Histamine Stimulated Small Intestine

Histamine Stimulated Small Intestine The longitudinal smooth muscle of the guinea-pig ileum small intestine contracts in response to acetylcholine. These contractions can be reduced by the application of adenosine and related compounds. The guinea-pig ileum is innervated by the enteric, sympathetic and parasympathetic divisions of the autonomic nervous system. The parasympathetic and enteric fibres release acetylcholine which acts on muscarinic receptors. The action of adenosine and its receptor antagonists can be assessed by comparing electrically induced contractions via electrical field stimulation and histamine induced contractions. Electrical field stimulation contractions cause presynaptic release of acetylcholine to produce contractions where as the histamine induced contractions cause postsynaptic contractile responses. Throughout this study adenosine and its receptor antagonist actions will be investigated and compared using electrical field stimulation and histamine. The contraction of the gut In gastrointestinal smooth muscles, researches show that there are two types of muscarinic receptors types that are present as targets to the neurotransmitter acetylcholine (Okamoto et al., 2002).Acetylcholine and its derivatives produce contractions by activating muscarinic receptors. The muscarinic receptors types are known as M2 and M3. Binding Studies have portrayed that the number of M2 receptors is greater than that of the M3 receptors however functional studies have shown that M3 muscarinic receptors play a fundamental role in mediating the contractile response (Eglen et al., 1996) and the functional role of M2 exists as unclear (Clague et al., 1985). The M3 receptor is coupled with G proteins, causing activation of phospholipase C and formation of inositol trisphosphate and diacylglycerol, which are expected to contribute in muscarinic receptor mediated smooth muscle contractions (Unno et al., 2005). They also mediate relaxation due to the release of nitric oxide from neighbo uring endothelial cells. M3 receptors in visceral smooth muscle contribute to the smooth muscle stimulating effect of muscarinic agonists. However the muscarinic receptor most abundant in the ileum is the M2 which cause an indirect contraction of the guinea-pig ileum by preventing the relaxing effect of drugs (Ehlert and Thomas, 1995). Both muscarinic receptor subtypes are activated by acetylcholine and produce a contractile response; however they vary in their transduction mechanisms and signalling pathways. Adenosine Adenosine has numerous diverse roles in normal physiology; such roles include promoting/maintaining sleep, regulating state of encouragement as well as local neuronal excitability and coupling cerebral blood flow to energy demand (Dunwiddie and Masino, 2001). It exists free in the cytosol of all cells and is transported in and out of all cells mainly using a membrane transporter(Rang et al., 2007). Under normal conditions, adenosine is formed intracellularly as well as extracellularly (Fredholm et al., 2001). ATP is stored in vesicles and released by exocytosis. It is also available in the cytosol of cells and is taken up and released via a specific membrane transporter. Released ATP and ADP are rapidly converted to adenosine by the action of tissue nucleotides. Studies have shown that there are pathways that contribute to adenosine formation, a) by the action of adenylate kinase and cystolic 5-nucleotidase, b) formation from hydrolysis of adenosine 3, 5 phosphate and c) formation by the action of S-adenosylhomocysteine (SAH) hydrolase. The pharmacological effects of adenosine include smooth muscle relaxation and inhibition of nerve activity, lipolysis and platelet aggregation(Daly et al., 1983). There is evidence that stimulation or inhibition is of adenylate cyclise is involved in adenosine action and therefore it has been concluded that adenosine is mediated by cyclic AMP. Based on its ability to inhibit cell function and thus minimise the metabolic requirements of cells, one of its functions may be as a protective agent released when tissue integrity is threatened. Adenosine exerts its physiological actions activation of a number of specific cell surface receptors. There are four different adenosine receptors known as A1, A2A, A2B, and A3. Some characteristics of these receptors are presented in Figure 1a. These subtypes have been distinguished on the basis of their agonist and antagonist selectivity. They belong to the G protein-coupled receptors. Mechanism of Adenosine action Adenosine A1 receptors are negatively coupled to the inhibition of adenylate cyclase, however they can act through other pathways such as stimulation of phospholipase C, activation of potassium channels and inhibition of N-type calcium channels (Zizzo et al., 2009). A1 receptors are coupled to Gi and G0 proteins and lead to inhibition of adenylate cyclase and consequently cause a decrease in cAMP (Ranjit, 2008). Adenosine A2A and A2B are coupled for activation of adenylate cyclise whereas A3 receptors have been shown to stimulate phospholipase C and D, to inhibit adenylate cyclase and to activate ATP sensitive potassium channel (Ralevic and Burnstock, 1998). Activation of these receptors require comparatively high amounts of adenosine. A2A and A2B receptors have a high and a low affinity for adenosine respectively. Receptor Subtype A1 A2A A2B A3 Transduction mechanism Inhibits adenylyl cyclase Activates adenylyl cyclase Activates adenylyl cyclase Inhibits adenylyl cyclase Primary distribution Brain (cortex, cerebellum, hippocampus). Dorsal horn of spinal cord. Eye, adrenal gland, atria Spleen, thymus, leukocytes, blood platelets. Straitopallidal GABAergic neurons, olfactory bulb Caecum, colon, bladder Testis, mast cells Tissue functions Antinociception, Hypothermia. Sedation, Sleep, Inhibition of lipolysis, Cardio and neuroprotection Reflex tachycardia, vasodilation, inhibition of platelet aggregation, sleep protection against ischemia Relaxation of vascular and intestinal smooth muscle, cytokine production, inhibition of cell proliferation Mast cell degranulation, coronary vasodilation and protection from reperfusion Selective antagonists DPCPX PSB 36 SCH 58261 PSB 1115 potassium salt MRS 3777 hemioxalate Figure 1a: Summary of adenosine receptors. Adenosine and the enteric functions of the Gut The enteric nervous system (ENS) consists of a compilation of neurons in the gastrointestinal nervous system which is capable of functioning independently of the central nervous system. It moderates motility, secretion, microcirculation, inflammatory and immune responses of the gastrointestinal tract (Altaf and Sood, 2008). The ENS is composed of extrinsic, which consists of parasympathetic and sympathetic divisions and the intrinsic component which encloses neurons. Intestinal functions results from an interaction between the ENS, smooth muscle and the mucosal/immune system. The network is regulated by several mediators; however there is consolidating evidence that adenosine is a significant regulating agent (Bueno, 2000) (Wood, 2004). Studies show that in the small intestine adenosine and adenosine derivatives where found to inhibit cholinergic transmission in guinea-pigs via a prejunctional action on neurotransmitter release (Gustafsson et al., 1978). The action of the A1 receptor s allowed mediation of the inhibitory action of adenosine in the cholinergic transmission(Shinozuka et al., 1985) of motor neurones innervating circular and longitudinal smooth muscle however A2A receptors have been reported to reduce the cholinergic motor responses(Gustafsson et al., 1985a; Gustafsson et al., 1985b). Histamine Histamine has a role as a primary transmitter or neuromodulator and it is widely distributed within mammalian tissues. (Izzo et al., 1998). Histamine is a vasoactive substance to be identified in the body which can rapidly metabolise and holds properties of being highly polar and not diffusing readily across cell membranes or the blood-brain barrier. It is stored in mast cells and basophils of blood and has two receptors known as H1 and H2. The release of histamine could cause changes in the cardiovascular system and induce anaphylactic shock. Histamine has been shown to induce gastric acid secretion through the H2 receptors linked to cyclic AMP production in oxyntic cells. Researches show that gastric cells of the guinea-pig may have a class of binding sites for histamine which shows no relationship to adenylate cyclase and the H2 receptor. Histamine creates a spasmogenic effect on the intestine that results from H1 receptor stimulation(Guy A. and Settipane, 1988-1989). There are three histamine subtypes known as H1, H2 AND H3 and all three have been identified to be present in the guinea pig small intestine. Studies show that H1 receptor subtypes mediate the contraction of the longitudinal muscle in the small intestine (Izzo et al., 1998). However researchers also state that the effect of histamine is predominantly due to the interaction with H1 receptors located on smooth muscle cells and moderately due to the interaction H2 receptors present on myenteric plexus interneurones (Bauer and Matusak, 1988). AIMS The aim is to confirm the prejunctional action of adenosine and examine whether adenosine has the additional ability to relax the smooth muscle directly. The project will use histamine to contract the smooth muscle and the objective is to find out whether adenosine can reduce these contractions and if so is the concentration range similar to that needed to inhibit the contractions to the electrical field-stimulation? It will also be investigated what adenosine receptor subtype is involved (A1, A2A, A2B, A3 identified using selective antagonists). METHOD Animals and preparation of tissue Dunkin Hartley guinea-pigs (250g +) of male sex that had previously been fed Harlan 2040, the guinea-pig diet and ad lib filtered tap water, were obtained from Harlan UK. They were group housed and provided with grade 6 woodchip and hay bedding. Their enrichment consisted of plastic and cardboard fun tunnels, plastic igloos and gnawing blocks. Furthermore they were kept at room temperatures of 19-23 °C and at room humidity of 45-65%. They were provided with 12 hours light and 12 hours of dark lighting. The guinea-pigs were stunned by a blow to the head and sacrificed by exsanguination. Two segments of 3cm length were removed from the distal part of the small intestine, for each tissue the ends were tied with cotton threads to the tissue holder and then suspended in 20ml organ baths containing Krebs solution (composition in mM: NaCl, 118; NaHCO3, 25; Glucose, 11; KCl, 4.7; CACl2, 2.5; KH2PO4, 1.18; MgSO4, 1.18). This was aerated with 95% O2 and 5% CO2 and maintained at 37 °C. The tissues were left for 30minutes to equilibrate under a resting tension of 1g before starting the stimulation. Experimental protocol The organ baths were equipped with parallel electrodes which allowed electrical field stimulation to be transmitted at a frequency of 0.1Hz, 40V, 0.5ms pulse duration. Contractions of the ileum were measured with isometric transducers (ADInstruments Force Transducers), amplified and recorded onto a data capture system (Lab Charts on the PC). The tissues were allowed to stabilise in the organ baths in order to reach steady contractions. Figure 1b represents the experimental set up. C:UsersHomeDocumentsDSC00308.JPG Figure 1b shows the laboratory designed set up for the experiment, with a set of two organ baths. There were several parts (a-e) to the experiments to be carried out on the ileum. n is the number of ileum used throughout the experiment n=18. The number of experiments carried out on the ileum was 56. Effect of Adenosine-the experiment consisted of stimulating the tissues continuously with electrical field stimulation and adding cumulative concentrations of adenosine (10-11M 10-4M) to the organ baths and the responses were recorded. Effect of Histamine- the tissues were stimulated with histamine, cumulative concentrations of histamine (10-11M 10-4M) were added to the organ bath and responses were measured. The concentration 110-6M gave the maximum response and a steady contraction, it was used to contract the tissue with adenosine. Effect of Adenosine in the presence of Histamine- the concentration of histamine that gave the maximum and steady response was added to organ bath. The tissue was permitted to stabilise in order to reach steady contractions. Once reached, cumulative concentrations of adenosine were added (10-8M 10-4M) in order to observe the responses of the ileum to adenosine in the presence of histamine. Effect of PSB36(10-8M) SCH58261(10-7M) to confirm identity of receptors being investigated, cumulative dose-response curves for induced contractions by histamine were observed for adenosine in the presence of selective antagonists, PSB36 and SCH58261. An experiment was also carried out, which involved electrical field stimulation to contract the tissue, adenosine was added in the presence of these antagonists. Effect of Atropine Atropine concentrations of 10-6M 10-7M were added to establish the effects of atropine on the electrically field stimulated ileum. For each drug that was being tested except atropine, the experiment was repeated at least six times. The tissue was washed out three times at least after an experiment was completed and was allowed to recover before another experiment was carried out. The electrical field stimulation was also switched off each time the tissue was washed out. Chemicals and drugs The drugs that were used consisted of Adenosine hemisulphate salt, Histamine diphosphate salt and Atropine sulphate salt which were all purchased from Sigma-Aldrich, Poole, UK. PSB36 and SCH58261 and DMSO (Dimethyl sulfoxide) were purchased from Tocris -Cookson, Bristol, UK. All drugs were dissolved in distilled water with exceptions of PSB36 AND SCH58261 which were diluted with DMSO.10ml of stock solution were made up in each case. Statistical Analysis All drug concentrations presented were final bath concentrations. The drug effects were expressed as twitch contraction (g). All data were given as means  ± S.E.M, where n represents the number of animals from which tissues were taken and on which observations were made. Inhibitory effects by adenosine in the field stimulated guinea pig ileum were measured and the responses of ileum twitch contraction were recorded for each concentration applied. This was repeated when using adenosine receptor antagonists. Adenosine responses were fitted onto concentration-response curve. Effects of histamine stimulated guinea pig ileum were also recorded. Adenosine responses and its receptor antagonist response were measured and plotted. 3.0 RESULTS a. b. Figure 2. The effect of adenosine concentrations in the guinea-pig ileum. Data are means  ±S.E.M and are expressed as an average of contractions (g). a. Representative traces showing inhibitory responses induced by adenosine. b. Concentration response curve for adenosine representing the average twitch response (g) when cumulative adenosine concentrations were added. Each point with bar represents the mean  ± S.E.M (n=6). Figure 3a: Original trace illustrating twitch response abolished by atropine 10-6M final bath concentration. b. c. Figure 3. Influences of atropine and potent and selective A1 adenosine receptor antagonist PSB36 10-7M AND 10-8M on guinea-pig ileum. b. Twitch responses of the guinea-pig ileum preparation to electrical field stimulation in the presence of PSB36 10-7M (n=6) and PSB36 10-8M (n=4), compared to twitch responses to adenosine alone. The experiments carried out were not paired. Each point with bar represents the mean  ± S.E.M. c. Contractions of the guinea-pig ileum preparation stimulated by histamine in the presence of PSB36 10-7M (n=6) and PSB36 10-8M (n=4), compared to responses to adenosine when stimulated with histamine (n=6). The experiments carried out were not paired. Each point with bar represents the mean  ± S.E.M. a. b. Figure 4. Summarises the effect of potent and selective A2A adenosine receptor antagonist SCH58261 10-7M on guinea-pig ileum. a. Twitch responses of the guinea-pig ileum preparation to electrical field stimulation in the presence of SCH58261 10-7M (n=6), compared to twitch responses to adenosine alone. The experiments carried out were not paired. Each point with bar represents the mean  ± S.E.M. b. Contractions of the guinea-pig ileum preparation stimulated by histamine in the presence of SCH58261 10-7M (n=6), compared to responses to adenosine when stimulated with histamine (n=6). The experiments carried out were not paired. Each point with bar represents the mean  ± S.E.M. Figure5a. A concentration-response curve illustrating the effects of adenosine on the guinea-pig ileum when the tissue is stimulated with histamine. . Each point with bar represents the mean  ± S.E.M (n=6). Figure 5b. Responses of the guinea-pig ileum to cumulative concentrations of histamine. Each point with bar represents the mean  ± S.E.M (n=8). Electrical field stimulated guinea-pig ileum produced reproducible twitch responses to adenosine. Adenosine concentrations ranging from 10-8M final bath concentration caused concentration dependent inhibitory effects. Administration of increasing adenosine concentrations decreased electrically evoked acetylcholine release from the cholinergic nerve endings of the ileum (Figure2). Figure 2b clearly portrays that adenosine has no effect at low final bath concentrations of 10-11M. Atropine 10-6M final bath concentration abolished the twitch responses to electrical field stimulation confirming they were produced by cholinergic nerve stimulation (Figure3). In the presence of selective A1 adenosine receptor antagonist PSB36 10-7M and 10-8M concentration and electrical field stimulation, the twitch responses to adenosine decreased, when adenosine was applied at higher concentrations, the twitch responses became smaller as acetylcholine release was inhibited and completely prevented by PSB36. Figure 3a shows the curve shifted to the right when PSB36 10-8 was administered compared to the curve of adenosine. When PSB36 10-7 was applied there is a slight shift of the curve to the right compared to the adenosine curve. The effects of the antagonist PSB36 are seen significantly at 10-8M final bath concentration as the shift of the curve is greater. The highest response the ileum produced was as at adenosine concentration of 1 x 10-8M, the responses lowered slightly at 1 x 10-6M and consequently decreased rapidly at 1 x 10-5M final bath concentrations. Histamine induces contractions in the ileum. Addition of cumulative concentrations of adenosine in the presence of PSB36 10-7M produced small responses compared to the contractions produced in the presence of PSB36 10-8M. The effect of PSB36 10-8M caused a rightward shift compared to the curve representing the effect of adenosine in the presence of histamine (Figure 3b). Electrically field stimulated ileum in the presence of the selective adenosine receptor competitive antagonist SCH58261 produced smaller responses (Figure 4a). Following administration of cumulative concentrations the responses decreased however produced no right shift in the dose response curve. Histamine excites the tissue causing it to contract and producing a high response, when adenosine is applied in the presence of SCH58261, the responses are inhibited and acetylcholine release is decreased and thus there is a decrease in the shape of the curve in Figure 4b. The results expressed in Figure 5a illustrate the inhibitory effects of adenosine in the ileum. Figure 5b illustrates the effects of histamine concentrations on the ileum. The experiment was carried out to investigate the best concentration to use so that a maximum and strong, reproducible contraction would be produced; the figure confirmed 110-6M final bath concentration to give the highest and steady contraction of the tissue. Moreover this permitted to obtain a dose-response curve for adenosine with histamine providing a suitable starting concentration for each drug at 110-8M. DISCUSSION The results of this present study show that adenosine plays an inhibitory role on muscular contractility in guinea-pig ileum. Adenosine prevents the neuroeffector transmission in guinea-pig ileum. The action of adenosine appeared to be cholinergic prejunctional in nature, this is portrayed when adenosine is applied to electrically field stimulated guinea-pig ileum(Gustafsson et al., 1985b). The action of adenosine on histamine stimulated guinea-pig ileum in the absence and presence of adenosine antagonists also indicates reduction in neuroeffector transmission however due to postjunctional action. The effect of adenosine on the guinea-pig ileum can be observed in Figure 2. Adenosine produced a dose-dependent depression on the response. It reduced the electrically evoked acetylcholine release from the ileum. A1 and A2 receptors have been reported to reduce acetylcholine release in the gastrointestinal tract(Tomaru et al., 1995). Adenosine released from neuronal endings is thought to have direct actions on smooth muscle as they illustrate relaxant neurotransmitters in the gastrointestinal tract(Storr et al., 2002). Atropine is a competitive antagonist for the muscarinic acetylcholine receptor, consequently when applied to the ileum at 10-6M final bath concentration; there is rapid inhibition of response confirming that the twitch responses were produced by cholinergic nerve stimulation. Adenosine inhibited the twitch response of the electrically stimulated guinea-pig ileum preparation, in the presence of PSB36 10-8M final bath concentration there was a right shift in the adenosine curve thus interpreting that higher concentrations were required to lower the twitch response. The general trends that Figure 3a displays is that the curves have the same form; the linear proportions of the curves are parallel. The traces help to show the changes in the response curve to adenosine and adenosine selective receptor antagonist PSB36. There is a slight fall in tension when adenosine 310-7M was applied in the presence of PSB36 10-8M; however there was a rapid decrease when adenosine 110-5M was administered causing the right shift in the Figure. Upon cumulative additions of adenosine to field stimulated guinea pig ileum the concentration required to inhibit acetylcholine release was of 310-7M, the effects diminish once concentration of adenosine 110-5M was added providing evidence that adenosine has the ability to relax smooth muscle in the ileum. Since PSB36 is a potent and selective A1 adenosine receptor antagonist, the A2A receptors increase electrically induced twitch contractions in the guinea pig ileum, which contributes to assistance of acetylcholine release (Storr et al., 2002). The effects of adenosine in the presence of PSB36 10-7M 10-8M to histamine stimulated guinea pig ileum can be observed in Figure 3b. Histamine administration to the guinea pig ileum caused a tonic histamine contraction which was followed by after-relaxation response, and application of adenosine inhibited the acetylcholine release. The ileum responses were reduced significantly with lower concentrations of adenosine in the presence of PSB36 10-7M and 10-8M compared to the concentrations of adenosine required in the electrically field stimulated ileum confirming that A1 receptors are the subtype present in the guinea pig ileum which cause the inhibition of acetylcholine release. SCH58261 did not significantly affect the position of the rightward shift however additions of cumulative adenosine concentrations caused reduction in the tension produced by the ileum. Large standard error bars can be observed in the figures, these may be due to human handling errors, i.e. micropipetting errors, administrating less or more concentration of adenosine or antagonists. Protein build up causing contamination in organ baths can also contribute to acquiring inaccurate results. Particular cells of the tissue may have become inactive at that moment of time. Furthermore it could be that the piece of thread holding the tissue may have become loose i.e. equipment errors and consequently tension was not measured accurately. It could also be due to unknown errors. Evidence that adenosine inhibits cholinergic neuroeffector transmission in the ileum by a prejunctional action on acetylcholine release can be of functional importance as adenine compounds are released during stimulation of intestinal nerves (Tomaru et al., 1995). Antagonists selective for adenosine receptors are beneficial in the research treatment of numerous conditions including cardiovascular, neurodegenerative and inflammatory diseases. In summary, the present study has confirmed the existence of presynaptic A1 receptors on the parasympathetic nerve terminals in the guinea pig ileum which upon activation causes inhibition of electrically induced neurogenic, cholinergic twitch contractions.

Causes of high unemployment in Zimbabwe Essay

Introduction: The unemployment rate is the proportion of the economically active population that is unemployed and actively looking for employment. In 1990, Zimbabwe embarked on a programme of Economic Reforms popularly known as Economic Structural Adjustment Programme (ESAP) and 1991-1992 saw one of the worst droughts. With close to 70% of the population living in the rural areas (CSO 1992) and dependent on agriculture for their livelihood, this constituted a major disaster. One result of these events was increased migration to the urban areas by people in search of employment. A further drought in 1995-1996 compounded the effect. Worsening economic conditions plus ever increasing corruption and crime have been the norm since 1995. Unemployment is currently soaring and the current rate stands at 70%. This has been from retrenchments, business closures e.t.c. According to EMCOZ survey, about 6000 jobs in the different sectors of the economy were lost by the end of 2001. The figure for 2002 was much higher as a result of the worsening business environment as the government fails to create opportunities to stimulate industrial expansion. Causes of Unemployment Unemployment is Zimbabwe has been caused by quite a number of factors. Most of these are mainly because of political reasons. The following are some of the factors that are causing unemployment: Sluggish investment and growth Weak export performance Poor macroeconomic policy environment The investment/business climate is unfriendly Population growth rate/age structure The growth path – reliance on primary products – is suboptimal Geography (proximity to South Africa, no direct access to the sea) Tertiary Education These are now explained below: Sluggish investment and growth The investment and growth of the Zimbabwe Economy has been shrinking of late. This has had a significant impact on the Zimbabwean companies. In the past 3 years, over 500 companies closed operations because of prohibitive operational conditions characterized by high input costs, hard currency shortages, high levels of interest rates, inflationary levels as well as the uncompetitive export market. Both the company and the government has been failing to effectively invest and thereby slowing growth. As a result, this has resulted in massive unemployment. Weak export performance Usually governments and exporters worry most about the foreign elasticity of demand for the exports. But in Zimbabwe today the most important is undoubtedly the domestic elasticity of supply of exports. This is reflected in the export volume numbers. In 2003, tobacco prices are still virtually unchanged from last year and higher than in previous years, but volumes are down by two-thirds. This then means that if we have very few goods that we are exporting, no we end up having a weak generation of foreign currency which we direly need for all our imports. This has significantly impacted on most organizations who eventually resort to the black market for the foreign currency. Poor macroeconomic policy environment The role of monetary policy is crucial because macroeconomic policy affects  the REAL economy, largely through the credit and capital markets. At the start of the 21st century monetary policy is the most powerful weapon that governments have at their disposal. Monetary policy influences interest rates (directly) and exchange rates (indirectly). It also influences investment, and thereby economic growth and employment. It has major implications for the financial markets – bonds and equities And today, its most important role is that of ensuring price stability. All this seem to have been ignored in the Zimbabwean scenario, where the macroeconomic policies are arm twisted just for the sake of political expediency. As a result, many sectors have been affected, and no jobs were created and thus an increase in unemployment. The investment/business climate is unfriendly The more profitable and attractive the business investment climate, the more firms will want to raise new money to expand and the more they will issue bonds. During a business boom or upswing the supply of bonds rises. The investment climate in Zimbabwe is not sufficiently favorable to attract the type of Foreign Direct Investment needed to transform exports. There are so many regulations concerning capital repatriation and profit/dividend remittability. This discourages investment and hence at the same time increasing unemployment. Population growth rate and age structure The population in Zimbabwe has been increasing at a decreasing rate, but the fact that the population is increasing without a complimentary increase in job opportunities, this therefore means all the job candidates are jobless. The growth path – reliance on primary products – is suboptimal Zimbabwe has been relying mostly on the products which are just primary. Such dependence has had no joy being found for the thousands of youths in Zimbabwe who are looking for jobs. Geography (proximity to South Africa, no direct access to the sea) Zimbabwe is a landlocked country and has been relying mostly on its neighbours namely South Africa and Mozambique. This has placed the country in a state of disadvantage hence the employment creation rate going down. Tertiary Education A number of tertiary colleges have sprung up in Zimbabwe, and yet the existing infrastructure is unable to absorb the swelling numbers of youths seeking training opportunities. There is also a high mismatch of skills acquired from training on one hand and the labour market opportunities on the other has led to increased job seekers. Seriousness of the problem: The issue of unemployment in Zimbabwe has reached such alarming levels which have brought discontent among the citizens of the country. This has been evidenced by the massive increases in the crime rates and other issues which include prostitution. This whole lot is as a result of a number of job seekers who are on the market failing to secure anything. Effects of Land Resettlement and HIV-AIDS on unemployment HIV and AIDS has been much talked about and discussed in Zimbabwe. This deadly incurable disease and virus has brought about much untold suffering and orphans. This also means that the number of job seekers flowing into the market will fall sharply. This might be a blessing in disguise in that it will provide a partial solution, but it will also highly likely slow the growth rate of the economy and thereby the rate of job generation. The issue about the effect of HIV-AIDS is two fold as it erodes both the employed and the unemployed. In the long run, there might end up there being very few numbers seeking for employment. The high levels of people who are  joining the job market make this a good pessimism. The massive land reform initiated by so-called war vets and the government produces more losers than winners. More than half a million farm workers have already lost their jobs and source of income, without gaining any of the redistributed land. Those displaced from the farms have found themselves on the job market. This then means that instead of solving a problem, the government has created more problems for itself. The problem with that is that this produces a chain of other problems interrelated to the farming business. On another note, if the land resettlement programme was well managed, this could bring a partial solution to the problem. This could temporarily create self-sustaining jobs for the rural community. The only problem is that the government in principle banned all commercial agriculture and villagised the whole country into small villages. This can never be a lasting solution to the unemployment problems as agriculture’s share of total employment falls as economies develop. Thus in the long run, this ceases to be a solution. Many hopes are on the informal sector which people say could expand given enough resources and incentives. Unfortunately, unemployment has risen far beyond the capacity of formal sector establishment while employment in the informal sector has grown phenomenally. Others, however, argue that expansion of the informal sector would generate new and equally serious economic problems – destroying the viability of formal sector operations, worsening crime levels, and devastating the environment, negatively affect national health programmes and affect state revenue inflows. Those in the informal sector remain an economic burden for the country because their incomes cannot meet basic needs and that most, if not all, operators subsist below the poverty datum line. It is a pre-requisite for employment creation in Zimbabwe to be enhanced by mobilisation of resources in capital markets through an unprecedented improvement of savings as a percentage of the Gross Domestic Product (GDP)  to around 25 percent so that funds would be invested and hence forth job creation. But to achieve this, the country should offer competitive investment incentives such as consistently low inflation and interest rates, stable foreign exchange rates, minimum state controls, low taxation and a politically stable environment. Improvement of conditions of services in the sector could be sustainable because of low wages, and there is need to realise that the economy could be stimulated through the rural sector, small scale and medium enterprises or large corporations. Conclusion All the stake holders, citizens and the government must all be actively involved the reduction of unemployment. Without this combined effort and commitment, unemployment is likely to continue rising since the economic conditions are worsening and it is becoming more difficult for the companies that had survived before to continue surviving. If things are left unattended to as they at the moment, unemployment will grow to be a self created time-bomb for the government and will eventually build enough pressure in it to force it to explode.

Meaning of life †Human Essay

?According to Albert Camus â€Å"You will never be happy if you continue to search for what happiness consists of. You will never live if you are looking for the meaning of life. † People can define happiness in various ways, for ones it means achieving their set goals while for others happiness means serving for society, and finally some people interpret happiness as finding the meaning of their life. People can spend their whole time only searching for the meaning of life, and they forget or ignore the life and real time that passes by. Unfortunately, you can search for the meaning of life and still not find it, or it can come to you with age. Significant events such as surviving the airplane or car crashes or losing the important people in one’s life, force humans to reconsider their values or beliefs, and can help to find the true meaning of life. Meaning of life is something that comes with the age, wisdom or experience. It is also hard to define what the meaning of life is, for it can be easily misinterpreted with the goals or values. I do not have my own meaning of life yet, for I am young, I have not so much experience in my life, and I cannot actually define what the meaning of life is. To begin with, I am not fully mature as a person because I am only twenty years old and my life has just started. Consequently, wanting to enjoy all the charms of my young life I try not to think about difficult topics such as meaning of life. I value my time that I have now, so I want to spend it learning and gaining an experience. The only thing I can figure out in this research on meaning of life, is that people value one thing – time. Having time we can find something or someone, develop ourselves and etc. Theoretically, we can do everything when we have time, but when we have time and do not have someone for whom we can spend it – our life becomes meaningless. Life becomes meaningful when we can spend time on objects and subjects that are important for us. As I am living with my parents, I do not even think about how to earn money, rise future generation and become independent person. I do not have to be a breadwinner at home, and I do not have to work yet. I do not have children, so I do not take the responsibility for treating my children right. However, it would be helpful to find out the meaning of life before I become a parent, for it would help me to raise my children right. My life is easier now, so I do not stop to think about the meaning of my life. Although I am dependent on my parents because they give me shelter, food and opportunity to get an education, I feel that being independent also would lead to thoughts about the meaning of life. Being a young adult give me the opportunity to gain an experience that could help me find the meaning of life. I am learning at the LCC university where professors from different countries tell their stories about their own life experience, and it seems that the person should have an experience in order to have a meaning of life. The experience of meeting different people, being introduced to different cultures, beliefs and values, and seeing the real adult life, all these experiences bring an insight about the meaning that the person can find in life. It is very difficult to find the right definition of meaning of life. When persons speak about creation of family or being a successful in work, it seems like goals and it is, but some people see it as the meaning. I can also assume that being happy and appreciative person has the real meaning in life, but is it the meaning of life? Maybe we should find the meaning that would lead us to feel happy and appreciative. I think that meaning of life does not even exist. There are only purposes. Love, family, friendship – are only purposes, and purpose is not the meaning. Why? Because they answer the question of approachability, we can reach it or not. Theoretically, if these things were meaningful, life would end when we reach all of them. Meaning is sort of general idea, which is accessible and equal to all. It cannot answer the question of feasibility. Actually, the meaning of life should by absolute verity. Overall, this is the topic that brings many thoughts to my mind. For now I can say that I do not have any specific meaning of my life so far. I am young, rebel, adventure seeking person, and the spirit that now lives in my soul gives me the opportunity to live and enjoy the fruits of my young adulthood years, and I rarely stop to think about the real meaning of life. I do not know whether it is right or wrong that I do not pay much attention for such topic. I believe that people become wiser with years, and that wisdom would bring the need to evaluate the life and to seek and find the meaning of it. I also cannot actually define what the meaning of life is, and I think that some people cannot find out it through their life. Overall, life is already meaningful as the person lives and breathes.

Civil Rights Movements During The World War II - 911 Words

Civil Rights Movements After the World War II, the United States has a significant impact in social changes on minorities’ social class status and gender. Women were not given equal rights to men and segregation in school between African American and White people to raise the issues to the roof. Veterans returned from the War had been treated badly and considered a lower class in society. Civil Rights movement involved many minorities group of people in the United States fight for the equal rights had been guaranteed in the Constitution, against racism, social class, and gender. It ended the segregation, racism, and gave society a different perspective on minority group of people in the United States. During the World War II, women played a role in the industrial and military through the workforce, helping the United States in building the country while in War and support troops from the warfare fighting for the nation. After the World War II, women had to lose their jobs over the veterans back from the War. Women were seen as no skill workers, home moms, and housewives. Of all the beneficial of post war, none of them rewards to women since veterans took more than the fifty percent of the work force. In the 1940s and 1950s, women continued their march into the workplace since traditional feminine roles of homemaker and mother (AP, 832). In the post war, young men and women tight up after they got back from the war. Baby boom is the huge explosion from births to returningShow MoreRelatedThe Civil Rights Movement During World War II955 Words   |  4 PagesDuring World War II, America as a nation faced many challenges both at home and abroad. Some of these challenges at home included Strikes and protests in war production factories, which was due to increasing differences between the government and employers, with the workers/labor unions. Another was the Civil rights movement for African-Americans, which advocated for equal rights for all Americans, when African Americans joined the war efforts by both joining the military and working in the war factoriesRead MoreThe Civil Rights Movement and World War II1075 Words   |  4 PagesAccording to president Franklin D. Roosevelt the future world shout be a world that people have essential human freedoms also known as the four freedoms; freedom of speech, freedom of worship, freedom from want, and freedom from fear. The reason of the United States took part in the World War II was to fight for human’s freedoms to liberate humanity in Europe and Asia, and to spread the American democracy to the entire world. â€Å"A revolution which goes on steadily, quietly adjusting itself to changingRead MoreWar : A Breath Of Change1715 Words   |  7 PagesWar: A Breath of Change in Literature World War II was a time of horrors, hardships, sicknesses, and deaths for people all around the world. It was, simply put, a time that showed what terrible acts mankind was capable of. The end of World War II left families scarred, brothers dead, and countries ruined. However, just as the phoenix rises from the ashes, so did a new world. World War II gave birth to a plethora of new ideas, such as the postmodernism movement which, without World War II, wouldRead MoreWorld War II : A Watershed Event1690 Words   |  7 PagesWorld War II was considered to be a watershed event in history by many historians. A watershed event is commonly referred to as an â€Å"event or period marking a turning point in a course of action or state of affairs†. World War II was an event that changed history and the aftermath wrecked most ideas of the future before the war. After the war every party wanted to not repeat this war, so instead of peace, the world rearmed with new technologies and huma nitarian ideologies to prevent any form of theRead MoreWorld War II and Social Equality1441 Words   |  6 PagesWorld War II and Social Equality World War II was a very important event in American history, but as bad as war is or seems to be there always seems to have better outcomes in the end. By the Japanese bombing Pearl Harbor on December 7, 1941 and bringing America into the war it opened the eyes of all Americans to the problems not only domestically but internationally and the biggest problem that was discovered after the completion of World War II was the level of social equality around the worldRead MoreFighting A War At Home And Abroad1643 Words   |  7 Pages FIGHTING A WAR AT HOME AND ABROAD OSCAR AGUILAR CYPRESS COLLEGE PROFESSOR JOSE M. ZAMORA May 12, 2015 Introduction World War II was a pivotal moment in U.S history for men and women of all colors. Years of hatred and violence were now going to be over looked by racial groups in order to fight against an overseas enemy. Racial groups contributed to the war effort despite having their civil rights violated, oppressed and even removed. Segregation during this period of war was very muchRead MoreMajor Historical Turning Points in Americas Current Society1650 Words   |  7 PagesMajor Historical Turning Points in Americas Current Society Name Institution Date Major Historical Turning Points in Americas Current Society Two greatest historical turning points in the World War II through 1970s Many historical events happened in the II world war as rescored in the 1970s. One of the major happenings was the Kent State shootings that happened in May 4, 1970. Ohio National Guardsmen were on duty as they guarded students who were on a strike in Kent state college. One ofRead MoreEssay on The Civil Rights Movement1708 Words   |  7 PagesThe civil rights movement comprised efforts of grassroots activists and national leaders to obtain for African Americans the basic rights guaranteed to American citizens in the Constitution. The key players in succeeding with the civil rights movement were the soldiers returning from the war, Martin Luther King Jr, Malcolm X, The Student Nonviolent Coordinating Committee (SNCC), and the anti-Vietnam War activists. During the civil rights movement, nearly every African American had experiencedRead MoreWars And Changes During The United States Essay1181 Words   |  5 PagesWars and Changes in The United States The United States of American is a superpower in the world. Although it just have almost 240 years’ history, it experienced more than 200 wars. As a saying does, â€Å" Bad times make a good man†, the United States never lack of great leaders. For example, George Washington, Abraham Lincoln, and Franklin Roosevelt were the three well-known presidents in the U.S. history. Additionally, wars and conflicts changed the United States directly and indirectly. ForRead MoreDBQ Questions781 Words   |  4 Pagesï » ¿DBQ QUESTIONS Writing the DBQ Civil War Assess the following quote: â€Å"Ultimately, the Civil War reduced sectional antagonism and made the United States truly ‘one nation.’† ____________________________________________________________________________________________________________________________________________________________ The Constitution Using information from the evidence below as well as your knowledge of the period, discuss the development of the United States Constitution as a

New Questions About Essay Topics for the Great Gatsby Answered and Why You Must Read Every Word of This Report

New Questions About Essay Topics for the Great Gatsby Answered and Why You Must Read Every Word of This Report You may also secure many discounts on our site which will help you to save some more money for future orders or anything you want to spend them on. Unfortunately, when any actual money on-line casino in the USA is sold to some other company this whole process has to be repeated. Posting a Whatsapp status, for instance, will demonstrate the amount of individuals who have seen it, and the real names of the folks who saw. After discovering our website, you will no longer will need to bother friends and family with these kinds of requests. Essay writing is a skill that you should cultivate to be able to pass your exams. It is possible to bet that we double check our essays so that you know you will get original work every moment. If you're looking for top essay writing companies, try out the mentioned above. Together with the UK Essay Help undergraduates find it impos sible to get worried about the time but delight in a complete life. What all you will need is getting the assistance from a specialist and EssaysChief is going to be the expert that you seek out. Utilise the aid of our service and don't be concerned about how you complete the school. Everyone has their wants and their wants. You are able to easily depend on us to find essay help as we have a tendency to assist and guide the students with the assistance of our professional experts. The Battle Over Essay Topics for the Great Gatsby and How to Win It So that is precisely what we do! The crucial feature is the fact that it's extra totally free chips and credits added to the starting balance at no cost. Finding Essay Topics for the Great Gatsby Because The Great Gatsby is told in the very first individual, there's some bias in just what the narrator describes. For instance, if you speak about Tom and Daisy Buchanan, you'll unquestionably wind up talking about society and class. He should have a great mansion so he could feel confident enough t o attempt to get Daisy. Myrtle, however, is another story. Thus, let's take a glance at a number of of the The Great Gatsby essay prompts you might locate impressive. Gatsby becomes corrupted because his principal purpose is to have Daisy. The odds are extremely great that you should compose a paper on The Great Gatsby. Whispered Essay Topics for the Great Gatsby Secrets It is intriguing to read and compose an essay about it. As you take into consideration The Great Gatsby and the subject of character flaws, consider how rich this topic is and the number of unique directions it may take. Employing the essay topics below for Great Gatsby in combination with the list of important quotes at the base of the webpage, you must have no trouble connecting with the text and writing a superb paper. Let's now look at every of those themes one by one (and make sure to take a look at the links to our whole theme breakdowns!) But it isn't the exact same deeply personal symbol it was in the very first chapter. The very first step is to choose a suitable topic when you're creating an essay on Literature. A Startling Fact about Essay Topics for the Great Gatsby Uncovered I think that it turned out to be a novel about foolishness and I'll never read it again. All of them have their own special definitions of the very same and aspire to shape their destinies using these personal beliefs. On the surface of it, the plot appears to be a standard story of broken hopes and expectations. The development of the language. The positive meaning also works nicely with the notion of a dock light. Fortunately our team is made up of professional writers which possess the capability to create remarkable content for you. Study Nick as a sign of honesty and Jordan as a sign of dishonesty. Don't hesitate to utilize it like an example and as an inspiration resource! In society today, individuals who are raised in hardship, carry the burdens of those that are raised easily. If however, you believe the endeavor is a little too much for, there is not any shame in contacting the professionals. One's prestige is joined to their social class. Thus, the more complex the prestige, the greater the social class.

William Shakespeares Hamlet - 964 Words

Weakness is an inadequate or defective quality in ones character that negates their strength that is often accentuated by an unsatisfactory situation. In William Shakespeares Hamlet, a characters inability to overcome their weakness due to it being emphasized by their unfortunate circumstance results in their tragic downfall. This is illustrated through Hamlets over thinking, Claudiuss ambition, and Gertrudes naive persona. Hamlets character is one that is very thoughtful and conscious, however some view these qualities as procrastination and over thinking. Even Hamlet himself acknowledges this in his soliloquy when he states: Why yet I live to say This things to do/ Sith I have cause and will and strength and means/ To dot. Examples gross as earth exhort me/ (4.4.46-48). Hamlet has all the motivation to strive for revenge with the untimely death of his father and his mothers incestuous and speedy marriage to Claudius, yet he still procrastinates the deed. Hamlet must overcome his constant over thinking of events and recognize in himself the strength and means to accomplish the required act. When Hamlet is finally presented the opportunity to get his revenge on Claudius, once again his feebleness arises as he talks himself out of killing him when he says: But in our circumstance and course of thought,/ ‘Tis heavy with him: and am I then reveng’d./ To take him in the purging of his soul, / W hen he is fit and season’d for his passage?(3.3.83-86).Show MoreRelatedWilliam Shakespeares Hamlet981 Words   |  4 PagesWilliam Shakespeare is a historic writer that is well known and wrote many plays in his lifetime. In most of his plays, if not all, he has incorporated hidden meanings and messages. The majority of his hidden meanings are controversial topics of his time period. In Shakespeare’s play, Hamlet, the controversial topic that is throughout the play is religion and the afterlife. Afterlife plays a big role in Hamlet and is discussed throughout the play. Multiple authors have written on the topic of afterlifeRead MoreWilliam Shakespeares Hamlet745 Words   |  3 PagesIn William Shakespeare’s Hamlet, Hamlet is a unique character due to his unpredictability. He is attempting to discover the truth in a way that no other character of Shakespeare’s has done. We find Hamlet in a state of deep melancholy due to the death of his father, as well as the very sudden and lewd marriage of his uncle and his mother. Hamlet is inspired by the player giving the speech about Hecuba witnessing the massacre of her husband, Priam. He goes off on his own, and he is bewilderedRead MoreWilliam Shakespeares Hamlet1482 Words   |  6 PagesIn one of William Shakespeare’s most notorious plays, Hamlet, Shakespeare uses multiple scenes filled with drama to add a certain extreme dimension to the play. In a story filled with drama, such as Hamlet, an author attempts to use intense dialogue and actions in order to invoke personal emotions and feelings in the hearts of the audience. Shakespeare attempted to have the audience feel the pain that Hamlet experienced, sense the feelings of revenge that were deep in the heart of the prince, andRead MoreWilliam Shakespeares Hamlet1308 Words   |  6 PagesWilliam Shakespeare’s play, Hamlet, has deep meaning and sorrow to its story. It has one of the most famous soliloquies ever to be w ritten in theater art, â€Å"To be, or not to be.† At first, reading Shakespeare’s writing seems difficult to understand and be interested in, but as the reader reads on and digs into the roots of the play, it truly grabs the reader’s attention and makes him/her want to know more of the thoughts behind Hamlet. Thus, the story of Hamlet begins and his personality shows throughoutRead MoreWilliam Shakespeares Hamlet 2214 Words   |  9 PagesMadness within: Bipolar William Shakespeare had the uncanny ability to read people then put into words how individuals reacted with one another. His most known playwright is â€Å"Hamlet†. Hamlet leads the opening of the play with grandeur; but, when his father’s ghost of comes to visit him telling of Hamlet’s uncle Claudius killed him. Hamlet schemes a plan pursuing revenge. Hamlet demonstrates depression exceptionally, in the presence of his mother and Uncle Claudius. Shakespeare’s character likely labeledRead MoreWilliam Shakespeares Hamlet Essay751 Words   |  4 PagesWilliam Shakespeares Hamlet Hamlet might well claim to be Shakespeares most famous play because of its language and the charm of its central character. Shakespeare wrote some thirty-eight plays. Taken individuallyRead More William Shakespeares Hamlet Essay1277 Words   |  6 PagesWilliam Shakespeares Hamlet Hamlet has been praised and revered for centuries as one of William Shakespeares best known and most popular tragedies. Based on its popularity, critics alike have taken various viewpoints and theories in order to explain Hamlets actions throughout the play. The psychoanalytic point of view is one of the most famous positions taken on Hamlet.   Ã‚  Ã‚  Ã‚  Ã‚     Ã‚  Ã‚  Ã‚  Ã‚  Psychoanalytic criticism is a type of literary criticism that analyzes and classifies many of the forms ofRead MoreWilliam Shakespeares Hamlet1172 Words   |  5 PagesHamlet is a complex story that uses many literary devices to help develop the characters in Hamlet. One dominant device is irony. The main plot of the story revolves around irony. Hamlet is a witty character and loves to use irony. Hamlet’s use of irony displays how he insults people, discovers useful information, and reveals his true character. The use of irony in this story helps to add depth to each character, which is why Hamlet is one of Shakespeare’s most complex stories. There are three typesRead MoreWilliam Shakespeares Hamlet Essay2474 Words   |  10 PagesWilliam Shakespeares Hamlet When first introduced to Hamlet he is a character full of pain and confusion, still mourning his father’s death, ‘But two months dead-nay, not so much, not two’.[1] The punctuation here highlights Hamlet’s anguish. Significantly, Hamlet is already portrayed as a misfit, as no one else within the court but Hamlet is wearing mourning clothes; in Shakespeare’s time it would have been worn for at least a year following the death of a king.Read MoreWilliam Shakespeares Hamlet710 Words   |  3 PagesIn Shakespeares tragedy Hamlet are very few female characters that is caused by the story - the son must avenge his fathers killer , the mother s uncle . Nevertheless images of Gertrude , Queen of the Danish and Ophelia , daughter of royal adviser Polonius , played in the tragedy very important role . In these two images are not simply embodied many typical female character traits - as worthy , and not so . In the process of communication with these women reveal deeper characters of Hamlet and

Run Lola Run Speech free essay sample

‘Run Lola Run’ is a film directed by Tom Tykwer that portrays many distinctively visual images through three themes; time, chance and life as a game. These themes are portrayed in the film explicitly through the composer’s effective use of techniques in creating uniquely visual images. Theme 1: Time is a very powerful force in people’s lives. Time is a focal theme displayed in the film ‘Run Lola Run’ and conveyed as a powerful aspect of the three runs throughout the film. A distinctively visual image relating to the theme time is when the screen shows three camera shots of Lola running, Manni impatiently waiting and a clock ticking in time. The visual technique applied is the use of insert shot; where a sequence of shots are displayed to portray an effective manner of time passing. Clocks are presented throughout the film. In the opening sequence a background sound of a clock ticking can be heard and the following misen-scene consists of a close up of a pendulum swinging ominously, then the camera pans upwards to reveal a demonic clock. We will write a custom essay sample on Run Lola Run Speech or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page The low angle shot of the clock emphasises the power of that time will have in the film. Overall the main theme time is a significant aspect of the film that is represented throughout the film through the use of distinctive visual images and techniques. Theme 2: Chance is a theme that is clearly portrayed in this film. The editing of this film highlights the major role that this theme plays in the lives of the characters. Images that represent the theme of chance during the film include the clippings that are shown of people that Lola runs into. These clippings show a flash forward in the people’s lives. These flash forwards clearly portray the theme of chance. Another significant scene which represents the theme of chance is the casino scene. Everyone in the casino crowd around Lola in the long shots that show the spectacle that she creates in the being so lucky. When she leaves, the audience is presented with a long shot of all the people who were in the casino staring blankly after her. When Lola rolls the dice in the casino we see close up shots of the dice and some of the scene is filmed in slow motion to indicate the gravity of what is happening and to draw the viewer’s attention. This also increases suspense for the audience. It is through the techniques of editing and shots and angles that the theme of chance is clearly portrayed. Theme 3: Another theme in the film is the notion of life as a game. Tykwer emphasises this theme using various visual images and techniques throughout certain scenes in the film. One effective technique that is implemented is animation. The image of an animated Lola running in the opening sequence and the animated Lola running down the spiral staircase at the beginning of each run creates a ‘game-like’ atmosphere. The use of this technique is to engage the viewers in a world running on the time of a game. A further image depicted throughout the film is the way Lola is given three chances to try and save Manni in the most efficient way possible. This is seen as a game as she is given another life every time she fails her previous attempt. Conclusion: Tykwer, uses a range of distinctively visual images and techniques to vividly portray the themes of time, chance and life as a game in the film ‘Run Lola Run’.