Monitoring Therapeutic Drugs: Strategies

Monitoring Therapeutic Drugs: Strategies This article provides an introduction into some of the current techniques and assays utilised in Therapeutic Drug Monitoring (TDM) TDM is a multi disciplinary function that measures specific drugs at intervals to ensure a constant therapeutic concentration in a patient blood stream. The selection of an analytical technique for TDM involves a choice between immunoassay and chromatography technique. Once the methodology has been chosen, there are also numerous options available within these categories including FPIA, EMIT, KIMS, HPLC and nephelometric immunoassay. An overview of each method is given and its processing of drugs. The future outlook in the methodology involved in TDM is also explored and discussed. INTRODUCTION Therapeutic drug monitoring (TDM) is a multi disciplinary function that measures specific drugs at selected intervals to ensure a constant therapeutic concentration in a patient blood stream. (Ju-Seop Kang Min Hoe Lee) The response to most drug concentrations is therapeutic, sub-therapeutic or toxic and the main objective of TDM is to optimize the response so the serum drug concentration is retained within the therapeutic range. When the clinical effect can be easily measured such as heart rate or blood pressure, adjusting the dose according to the response is adequate (D.J. Birkett et al). The practice of TDM is required if the drug meets the following criteria: Has a narrow therapeutic range If the level of drug in the plasma is directly proportional to the adverse toxic If there is appropriate applications and systems available for the management of therapeutic drugs. If the drug effect cannot be assessed by clinically observing the patient (Suthakaran and C.Adithan) A list of commonly monitored drugs is given in table 1. The advances in TDM have been assisted by the availability of immunoassay and chromatographic methods linked to detection methods. Both techniques meet the systemic requirements of sensitivity, precision and accuracy. Within both methods are many numerous options and will be further explored in this title. Ideally the analytical method chosen should distinguish between drug molecules and substances of similar composition, detect minute quantities, be easy to adapt within the laboratory and be unaffected by other drugs administrated. An overview of the current analytical techniques and future trends in TDM is emphasised in this title and its role in laboratory medicine. NEPHLEOMETRIC IMMUNOASSAY AND its USE IN TDM Immunoassays play a critical role in the monitoring of therapeutic drugs and a range of techniques in which the immunoassay can be existed exist. Nephleometric immunoassays are widely used for TDM and are based on the principle of hapten drug inhibition of immunoprecipitation. The precipitation is measured using nephelometric principles that measure the degree of light scattering produced. In some cases Turbidmetry principles can be applied to measure precipitation via the amount of transverse light. In nephleometric immunoassays, if the drug molecule is a monovalent antigenic substance, a soluble immunocomplex is formed. However if the drug molecule is a multivalent antigenic substance, whereby two drug moieties are conjugated to a carrier protein, the conjugate reacts with the antibody to form an insoluble complex. The insoluble complex may compose of numerous antigens and antibodies, thus scattering the light. Therefore nephleometry of turbidmetry techniques are required to measure the reaction. In respect to this principle precipitation inhibition of a drug can be measured. The test sample (serum) is introduced to a fixed quantity of polyhaptenic antigen and anti drug antibody. The serum drug antigen competes with polyhaptenic antigen for binding to the anti drug antibody. Any free drug present in the sample inhibits the precipitation between the antibody and polyhaptenic antigen. Therefore the drug concentration ids indirectly proportional to the formation of precipitate whi ch is quantified by a nephelometer. The more polyhaptenic antigen present, the more precipitate is formed until the maximum is encountered. Further addition of antigen causes a reduction in the amount of precipitate formed due to antigen excess. The use of nephelometric immunoassay for TDM is termed competitive due to the competitive binding for the sites on the antibody by the antigen. It also distinguishes the drug assay system from the conventional nephleometric immunoassay for proteins. Variations of this assay exist including: The use of saliva or CSF may be used as an alternative to serum. Both alternative matrixes contain less light scattering molecules and so a larger volume of sample is used in order to compensate. Turbidmetric methods may also be applied to quantitative immunoprecipation . turbidmetric analysis is preformed at a lower wavelength and similarly detects immunoprecipation like nephelometric techniques. End point analysis of immunoprecipitaion is commonly employed, however rate analysis is also applicable. Addition of formaldehyde blocks further precipitation and is utilised in end point analysis. Agglutination inhibition immunoassay can also be detected by nephelometric immunoassay systems in which the drug or hapten is directly linked onto the surface of the particle and is generally suitable for low serum drug concentration while precipitation inhibition detects concentration above 1ug/ml If homologus and heterologus drug concentrations are utilized for antibody and polyhaptenic antigen preparations, sensitivity and specificity may be increased. Polyclonal and monoclonal antibodies may be employed in this assay. The use of monoclonal antibodies removes any interference caused by antibody cross reactivity. Choosing a hybrid cell with the most desirable antibody is difficult and therefore is most likely to be less sensitive than the use of polyclonal antibodies Overall the nephelometric immunoassay is an excellent assay system for TDM. Advantages over other assay systems include its simplicity, speed and low cost. It is a homogenous method that requires no separation steps or isotopes. Only two reagents are required in limited amounts as if the antibody to antigen ratio is not optimum, the sensitivity is decreased. This is due to the formation of less precipitate in the absence of drug. In the presence of a drug, inhibition is less efficient. The sensitivity of the assay depends on antibody hapten binding, however it yields high specificity. Therefore nephelometric precipitation inhibition immunoassays are a novel technique in the clinical practice of TDM. (Takaski Nishikawa Vol 1, 1984) FLUORESCENCE POLARIZATION IMMUNOASSAY AND its USE IN TDM Fluorescence polarization immunoassay(FPIA) is a widely used 2 step homogenous assay that is conducted in the solution phase and is based on a rise in fluorescence polarization due to the binding of the fluorescent labelled antigen with antibody. The first step of the immunoassay involves the incubation of the serum sample with none labelled anti drug antibody. If the patient sample contains drug molecules, immune complexes will form between antibody and antigen. The second stage of this assay involves the addition of a flourscein labelled antigen (tracer) into the mixture(.Jacqueline Stanley 2002) The purpose of the flourscein tracer is to bind on any available sites on the drug specific antibody for detection purposes. If the first stage occurred in which the anti drug antibody formed a complex with the drug from the sample, less or no antigen binding sites will be available for the tracer to bind to. Consequently a higher proportion of the flourscein tracer is unbound in the solut ion. If the sample contains no drug an antigen, Step 1 does not occur and the anti drug antibodies will bind the flourscein antigen tracer. In this assay the degree of polarization is indirectly proportional to the concentration of drug present. (: Chris Maragos 2009) Fluorescence polarization is calculated to determine the concentration of drug present. Fluorscein labelled molecules rotate when they interact with polarised light. Larger complexes rotate less then smaller complexes and therefore remain in the light path. When the large immune complex is labelled with a fluorescent tracer, it is easily detected once present in the light path. If no drug was present in the sample, the availability of binding sites on the antibody entices the fluorscein tracer to bind, restricting its motion resulting in a higher degree of polarisation, Thus it is easy to identify that polarization is indirectly proportional to the concentration of drug present. The benefit of utilising FPIA in TDM includes the elimination of processed to separate bound and free labels, an indicator that this assay is time efficient. An unique feature of this assay is that the label used is a flurophore and the analytical signal involves the measurement of the fluorescent polarizatio n. ( Jacqueline Stanley 2002) A standard curve is constructed to determine the concentration of drug present and is easily reproducible due to the stability of the reagents utilized and the simplicity of the method. However FPIA has some limitations and is prone to interference from light scattering and endogenous fluorescent tracers in the samples. To help overcome these limitations variations on the technique is employed including: Use of a long wavelength label The fluorscein tracers utilized produce adequate signals, however light scattering events can interfere with these signals. The use of a long wavelength label permits extended fluorescence relaxation times which may be more sensitive for the detection of high molecular weight antigens on drugs. Use of CE-LIF The use of capillary electrophoresis with laser induced fluorescence detection enhances the sensitivity of this method. This competitive FPIA separates free and antibody bound tracers and utilizes LIFP as a detection system.( David S. Smith Sergei A 2008) Overall FPIA has proven to be a time and cost effective, accurate and sensitive technique in TDM and remains one of the most promising methods in this clinical field. ENZYME MULTIPLIED IMMUNOASSAY TECHNIQUE AND its USE IN TDM Enzyme Multiplied Immunoassay Technique (EMIT) is an advanced version of the general immunoassay technique utilising an enzyme as a marker. EMIT is a 2 stage assay that qualitatively detects the presence of drugs in urines and quantitatively detects the presence of drugs in serum.( David S. Smith Sergei A )Both the competitive and non-competitive forms of this assay are homogenous binding based that rapidly analyze microgram quantities of drug in a sample. in the competitive assay, the patient sample is incubated with anti drug antibodies. Antibody antigen reactions occur if there is any drug present in the sample. The number of unbound sites indirectly correlates with the drug concentration present. The second step involves the addition of an enzyme labelled specific drug which will bind to available binding sites on the antibody inactivating the enzyme. A enzyme widely used in EMIT assays is Glucose 6 Phosphate Dehydrogenase which primarily oxidises the substrate added (Glucose 6 Phosphate). The co-factor NAD+ is also reduced to NADH by the active enzyme. Any enzyme drug conjugate that is unbound remains active, therefore only in this case , can the oxidation of NAD+ to NADH occur. An increase in absorbance photometrically @ 340nm correlates with the amount of NADH produced. (Jacqueline Stanley 2002) A non competitive format of this assay also exists, where by drug specific antibodies are added in excess to the sample resulting in antigen antibody interactions if the drug is present. A fixed amount of enzyme drug conjugate is then added which occupy any unbound sites present on the antibody. The active enzyme that is unbound oxidised NAD+ to NADH indicating presence of free enzyme conjugate and subsequently drug molecules present. (chemistry.hull.ac.uk/) EMIT technology is becoming increasingly popular as a method to monitor therapeutic drug levels. Drugs monitored using this technique includes anti asthmatic drugs, anti epileptic drugs and cardio active drugs. Radioimmunoassay work on the same principle as competitive EMIT with the exception of the use of a radio isotope as a marker. Gamma radiation is emitted from the marker leading to a high level of sensitivity and specificity. As it uses radio isotopes it is not the most cost effective in todays modern environment. MICROPARTICLE IMMUNOASSAY AND its USE IN TDM Microparticle agglutination technology uses latex microparticles and plays a leading role in TDM in the quantitative measurement of carbarbapenzaine, phenytoin, theophylline and phenybarbital. Kinetic movement of microparticles in solution (KIMS) is a homogenous assay and is based on the principle of competitive binding between microparticles via covalent coupling. When free drug exists in the patient sample, it will bind to the antibody present. As a result the microparticle antigen complex fail to bind with the antibody and the formation of a particle aggregate does not occur. Micro particles in solution fail to scatter light causing a low absorbance reading. If the patient sample is negative for the drug, the micro particle drug complex binds to the antibodies. The complex that is formed upon binding blocks the transmitted light and causes light scattering resulting in increasing absorbance readings. Hence the degree of light scattering is inversely related to the concentration of drug present. Light scattering spectroscopy improves the sensitivity and quantitation of particle based immunoassays, thus making KIMS a highly sensitive and accurate technique in TDM. Its popularity has developed throughout the years for many reasons. Reagents required for this assay are in expensive and have high stability. KIMS is a universal assay and can be preformed on a variety of analyzers. The assay has minimal interference as a change of absorbance is measured as a function of time while absorbance readings of interfering substances do not alter with time.( Frederick P. Smith, Sotiris A. Athanaselis) CHROMATOGRAPHY AND its USE IN TDM For many years liquid chromatography has been linked to detection systems and its application in TDM is becoming incredibility popular. Liquid chromatography was initially employed in response to difficulties arising in Gas Chromatography (G.C) due to heat instability and non specific adsorption on surfaces. High Performance Liquid chromatography is the main chromatography technique utilized for TDM. Thin Layer Chromatography (T.L.C) and Gas Chromatography are other alternatives, however have limitations that suppress their use in TDM. A derivatization step must be performed for highly polar and thermo liable drugs for G.C to be successful. TLC has a poor detection limit and is unable to detect low concentration of drug present. HPLC has revolutionized the monitoring of TDM with rapid speed and sensitivity of analysis and can separate a wider variety of drugs compared to GC and TLC. For this reason, HPLC is considered the most widely adaptable chromatographic technique when coupled w ith UV detection and Mass Spectrophotometry for TDM.( Phyllis R. Brown, Eli Grushka) BASIC PRINCIPLES IN HPLC HPLC is a separation technique performed in the mobile phase in which a sample is broken down into its basic constituents. HPLC is a separation technique that employs distribution differences of a compound over a stationary and mobile phase. The stationary phase is composed of a thin layer created on the surface of fine particles and the mobile phase flows over the fine particles while carrying the sample. Each component in the analyse moves through the column at a different speed depending on solubility in the phases and on the molecule size. As a result the sample components move at different paces over the stationary phase becoming separated from one another. Drugs that are localised in the mobile phase migrate faster as to those that are situated in the stationary phase. The drug molecules are eluted off the column by gradient elution. Gradient elution refers to the steady change of the eluent composition and strength over the run of the column. As the drug molecules elute of HPL C is linked to a detection system to detect the quantity of drug present in the sample. Detection systems include mass spectrophotometry and UV detection. (Mahmoud A. Alabdalla Journal of Clinical Forensic Medicine) DETECTION SYSTEMS USED IN HPLC FOR TDM Detection of HPLC with a diode array ultraviolet detector has proved to be a sustainable application system in the identification after HPLC analysis. The use of UV detection allows the online possession the compounds UV spectra. These detection system absorb light in the range of 180-350nm. UV light transmitted passes through a sensor and from that to the photoelectric cell. This output is modified to appear on the potentiometric recorder. By placing a monochromatoer between and light source and the cell, a specific wavelength is created for the detection , thus improving the detectors specificity. A wide band light source can also be used as an alternative method. In this case the light from the cell is optically dispersed and allowed to fall on the diode array.( Mahmoud A. Alabdalla Journal of Clinical Forensic Medicine) HPLC can also be coupled to a mass spectrophotometer as a detection method. Mass spectrophotometry (MS) elucidates the chemical structure of a drug. Sensitivity of this technique is observed as it can detect low drug concentration in a sample. Specificity of this method can be futher enhanced by Tandem mass spectrophotometric analysis. This involves multiple steps of mass spectrophotometry. This is accomplished by separating individual mass spectrometer elements in space or by separating MS phases in time. (Franck Saint-Marcoux et al) FUTURE TRENDS IN TDM METHODOLOGY AGILENTS 1200 HPLC MICRO CHIP Agilents 1200 HPLC micro chip technology combines microfliudics with an easy use interface that confines the HPLC procedure tot his dynamic chip. The micro chip technology integrates analytical columns, micro cuvette connections and a metal coated electro spray tip into the chip to function as a regular HPLC analyzer. The compact chip reduces peak dispersion for a complete sensitive and precise technique. The microchip comes complete with an integrated LC system into sample enrichment and separation column. The operation of the chip is well defined and manageable upon insertion into the Agilent interface which mounts onto the mass spectrophotometer. The built in auto sampler loads the samples and the sample is moves into the trapping column by the mobile phase. Gradient flow from the pump moves the sample from the trapped column to the separation column. The drug is separated the same as the convention methods however reduced peak dispersion does produce better separation efficiency than the conventional method. This form of technology is currently in use in the United States but has not developed outside of the U.S(http://www.agilent.com) PHYZIOTYPE SYSTEM This is the latest application on the market for the treatment and monitoring of drugs associated with metabolic disorders. The PhyzioType system utilizes DNA markers from several genes coupled with biostatisical knowledge to predict a patients risk of developing adverse drug reactions. (Kristen k. Reynolds Roland Valdes) AMPLICHIP CYP450 TEST The Amplichip CYP450 Test is a new technology that has revolutionised the TDM of anti psychotic drugs. This test has been approved by the FDA in 2006 but is not currently in use in laboratories in Ireland. This test is used for the analysis of CYP2D6 and CYP2C19 genes, both of which have an influence in drug metabolism. The function of this test is to identify a patient genotype so their phenotype is calculated. Based on the patient phenotype, a clinician determines the type of therapeutic strategy he/she will commence (Kristen k. Reynolds Roland Valdes) DISCUSSION This paper illustrates the increasing role of immunoassay and chromatography techniques in the clinical laboratory routine monitoring of therapeutic drugs. Before an analytical technique is introduced into TDM it must meet the requirements of sensitivity, accuracy and specificity needed for most TDM applications. The methodology of TDM in todays clinical setting revolves around the use of immunoassays and chromatography techniques. A range of immunoassays was discussed revolving around their principle and advantages and limitations. The majority of immunoassays utilised in the TDM are homogenous based for rapid analysis and efficient turn around time for drug monitoring. Most immunoassays involved in TDM are based on the same principle of competitive binding for antibody. The factor that distinguishes each immunoassay is the detection methods used. Detection methods discussed in this reviewed include nephelometric techniques, flourscein labels, enzyme labels and the use of micro part icles. Each method relies on different detection principles as discussed, however characteristics common to all methods include accuracy, sensitivity and specificity. The methodologies discussed also are time and cost efficient, both essential in laboratory assays. Chromatographic techniques are also discussed with HPLC providing the most impact to TDM. Gas and thin layer chromatography are other chromatographic techniques, however neither can be utilised in TDM due to the limitations both techniques hold against TDM. . HPLC is a rapid sensitive method for the quantitation of drugs in a sample and for this reason is the most widely adaptable chromatographic technique applied in TDM. Like all chromatographic techniques drugs are separated based on the interaction of the drug with the stationary phase which determines the elution time. Detection methods primarily used are UV detection and mass spectrophotometry The final thought on this overview of TDM was an insight into the future of its methodology and applications .Future and approved methods are discussed given a brief outline on each. The constant development of methodologies and techniques in this area of TDM are ongoing constantly keeping the area of TDM one of the most fastest and interesting in clinical medicine. Literature Review: The Impact Of Legalized Abortion Literature Review: The Impact Of Legalized Abortion The publication of the controversial paper on legalised abortion and its affect on the rate of crime by Levitt and Donohue (2001) has resulted in widespread condemnation from a variety of sources, for example, Joseph Scheidler, executive direction of the Pro-Life Action league, described the paper as so fraught with stupidity that I hardly know where to start refuting it Crime fell sharply in the United States in the 1990s, in all categories of crime and all parts of the nation. Homicide rates plunged 43 percent from the peak in 1991 to 2001, reaching the lowest levels in 35 years. The Federal Bureau of Investigations (FBI) violent and property crime indexes fell 34 and 29 percent, respectively, over that same period. (Levitt, 2004) In his journal The impact of Legalized abortion on crime Levitt attempts to offer evidence that the legalization of abortion in 1973 was the chief contributor to the recent crime reductions of the 1990s. Levitts hypothesis is that legalized abortion may lead to reduced crime either through reductions in cohort sizes or through lower per capita offending rates for affected cohorts. The smaller cohort that results from abortion legalization means that when that cohort reaches the late teens and twenties, there will be fewer young males in their peak crime years, and thus less crime. He argues that the decision in Roe v Wade constitutes an abrupt legal development that can possibly have an abrupt influence 15-20 years later when the cohorts born in the wake of liberalized abortion would start reaching their peak crime years. In essence, Levitt puts forward the theory that unwanted children are more likely to become troubled adolescents, prone to crime and drug use, than wanted children are. As abortion is legalized, a whole generation of unwanted births are averted leading to a drop in crime two decades later when this phantom generation would have grown up. To back up this point, Levit t makes use of a platform from previous work such as (Levine et al 1996) and (Comanor and Phillips 1999) who suggest that women who have abortions are those most likely to give birth to children who would engage in criminal activity. He also builds on earlier work from (Loeber and Stouthamer-Loeber 1986) who concludes that an adverse family environment is strongly linked to future criminality. Although keen not to be encroach into the moral and ethical implications of abortion, Levitt, through mainly empirical evidence is able to back up his hypothesis by concluding that a negative relationship between abortion and crime does in fact exist, showing that an increase of 100 abortions per 1000 live births reduces a cohorts crime by roughly 10 per cent and states in his conclusion that legalized abortion is a primary explanation for the large drops in crime seen in the 1990s. One of the criticisms that can be levied against this study is its failure to take into consideration the effect other factors may have had in influencing crime rates during the 1980s and 1990s, such as the crack wave. Accounting for this factor, the abortion effect may have been mitigated slightly. Also Levitts empirical work failed to take into account the greater number of abortions by African Americans who he distinguishes as the race which commit the most amount of violent crime, and his evidence fails to identify whether the drop in crime was due to there being a relative drop in the number of African Americans. The list of possible explanations for the sudden and sharp decrease in crime during the 1990s doesnt stop at Levitts abortion/crime theory and Levitt himself in his 2004 paper identifies three other factors that have played a critical role. The first is the rising prison population that was seen over the same time period, and (Kuziemko and Levitt, 2003) attribute this to a sharp rise in incarceration for drug related offences, increased parole revocation and longer sentences handed out for those convicted of crimes, although there is the possibility of a substitution effect taking place where punishment increases for one crime, potential criminals may choose to commit alternative crimes instead. There are two ways that increasing the number of person incarcerated could have an influence on crime rates. Physically removing offenders from the community will mean the avoidance of any future crime they may plausibly commit during the time they are in prison known as the incapacitation affect. Also there is the deterrence effect, through raising the expected punishment cost potential criminals will be less inclined to commit a crime. As criminals face bounded rationality, expected utility gained from crime will have an effect on the amount of time spent devoted to crime. (Becker, 1968). A study conducted by Spelman (2000) examined the affect the incarceration rate would have on the rate of crime and finds the relationship to have an elasticity measure of -0.4 which means that an increase in the levels of incarceration of one percent will lead to a drop in crime of 0.4%. In Economic models of crime such as Becker (1968), improvements in the legitimate labor market make crime less attractive as the return earned from legitimate work increases. Using this model, the sustained economic growth that was seen in the 1990s (Real GDP per capita grew by almost 30% between 1991 and 2001 and unemployment over the same period fell from 6.8 to 4.8 percent) could be seen as a contributing factor to the drop in crime witnessed and many scholars (such as) have come to that conclusion. However, the improved macroeconomic performance of the 90s is more likely to be relevant in terms of crimes that have financial gains such as burglary and auto theft and does not explain the sharp decrease seen in homicide rates. Also, the large increase in crime seen in the 1960s coincided with a decade of improving economic growth, further corroborating the weak link between macroeconomics and crime (Levitt, 2004). One other explanation for the drop in crime and the most commonly cited reason can be seen in the growing use of police innovation, and an adoption of community policing. The idea stemmed from the broken window theory, which argues that minor nuisances, if left unchecked, turn into major nuisances (Freakonomics) The main problem with the policing explanation is that innovative police practices had been implemented after the crime rate had already began declining, and perhaps more importantly, the rate of crime dropped in cities that had not experienced any major changes in policing (Ouimet, 2004).

Essays --

Ultrasounds also known as ultrasonography is an imaging technique that uses high-frequency sound waves to make pictures of structures that bounce off internal body parts to create images for medical purposes. This high pitch frequency cannot be heard by the human ear. Over the years, these noninvasive procedures for the most part have replaced the invasive surgery. These procedures cause the patient less trauma and a lower risk of complications that could arise from the alternative surgery. Most ultrasound procedures are done by using a device on the outside of the body, though there are some ultrasounds that are transvaginal. A transvaginal ultrasound is a procedure that involves placing a tubular probe like stick inside the body. In a normal ultrasound procedure, the reflections of high-frequency sound waves that locate, measure and outline deep structures. The sound wave that is sent by an ultrasound Doppler transducer that will travel until it hits a boundary between tissues, wh ich get reflected back to the probe. An ultrasound procedure is also less expensive compared to the surgical procedure. Ultrasounds have become an important procedure in the medical field. These procedures allow specialist to quickly evaluate the patient’s condition, and enable doctors to treat the condition before it is out of hand. Over the years studies have researched ultrasounds and have become more popular and easier to perform, there are many types of ultrasounds such as prenatal ultrasounds, therapeutic ultrasounds, prostate ultrasounds, cardiac ultrasounds, breast ultrasounds, First, the prenatal ultrasound is the most common type of ultra sound. This ultrasound is what most mother look forward to during their pregnancy. These ultrasound sca... ...h as; gallbladder, liver, pancreas, kidneys, and spleen. These ultrasounds may be performed if the patient has pain in the abdomen, enlarged organs, gallstones, cancer, tumors, and many more conditions. Ultrasounds are used in clinical practices all over the world for many different reasons. Studies have shown that ultrasounds have substantial benefits. The Journal of the Canadian Chiropractic Association says â€Å"studies consistently reported that ultrasound has therapeutically beneficial effects on pain and functional outcomes.† (Assoc.) Ultrasounds have came a long way, and have almost replaced surgical procedures since surgeries cause so much trauma. Ultrasounds are painless procedures, and are done to provide pictures for the specialist to provide pictures to diagnosis abnormalities, help when doing procedures, and make sure unborn babies are growing normally.

A Freudian Perspective of Shakespeares Macbeth Essay -- GCSE English

Macbeth:   A Freudian Perspective   Ã‚  Ã‚  Ã‚  Ã‚   Macbeth and Lady Macbeth   We may take as an example of a person who collapses on reaching success, after striving for it with single-minded energy, the figure of Shakespeare's Lady Macbeth. Beforehand there is no hesitation, no sign of any internal conflict in her, no endeavour but that of overcoming the scruples of her ambitious and yet tender-minded husband. She is ready to sacrifice even her womanliness to her murderous intention, without reflecting on the decisive part which this womanliness must play when the question afterwards arises of preserving the aim of her ambition, which has been attained through a crime.    Analytic work has no difficulty in showing us that it is forces of conscience which forbid the subject to gain the long-hoped-for advantage from the fortunate change in reality. It is a difficult task, however, to discover the essence and origin of these judging and punishing trends, which so often surprise us by their existence where we do not expect to find them. For the usual reasons I shall not discuss what we know or conjecture on the point in relation to cases of clinical observation, but in relation to figures which great writers have created from the wealth of their knowledge of the mind. We may take as an example of a person who collapses on reaching success, after striving for it with single-minded energy, the figure of Shakespeare's Lady Macbeth. Beforehand there is no hesitation, no sign of any internal conflict in her, no endeavour but that of overcoming the scruples of her ambitious and yet tender-minded husband. She is ready to sacrifice even her womanliness to her murderous intention, without reflecting on the decisive part which this womanl... ... Die Braut von Messina, III v. Strachey and Tyson (eds.).   Ã‚   Endnote 2 Cf. Macbeth, Act III, sc. I: Upon my head they placed a fruitless crown, And put a barren sceptre in my gripe, Thence to be wrenched with an unlineal hand, No son of mine succeeding ...   Ã‚   Endnote 3 As is Richard III's wooing of Anne beside the bier of the King whom he has murdered.   Ã‚   Endnote 4 Freud had already suggested this in the first edition of The Interpretation of Dreams (1900), Standard Edition, IV 266. Strachey and Tyson (eds.).   Ã‚   Endnote 5 This does not appear to have been published. In a later paper on Macbeth Jekels (1917) barely refers to this theory, apart from quoting the present paragraph. In a still later paper, on The Psychology of Comedy, Jekels (1926) returns to the subject, but again very briefly. Strachey and Tyson (eds.).     

Environmental Degradation Essay

In 1987 The United Nations World Commission on Environment and Development (WCED) released a pioneering report concerning the environmental damage that is going on. Through the report, called â€Å"Our Common Future†, WCED passed a warning that soon the world would be facing intolerable levels of damage to the environment if we are not going to alter our way of living. It would also lead to the humans suffering due to it. The Commission explained that there is a pressing requirement of changing the speed as well as the trend of international economic growth so that it meets the capacity of the world. It said: â€Å"Humanity has the ability to make development sustainable to ensure that it meets the needs of the present without compromising the ability of future generations to meet their own needs. † (World Commission on Environment and Development, 1987: 8) After thoroughly analysing the situation it can be concluded that the environmental crisis has an impact on each of the nation in the world. However, the extent to which they are affected is different and depends on the way they consume and also their economic expansion. Just 25% of the global population consumes a very high percentage of the world’s fossil fuels and chemical goods; as high as 70% and 85% respectively. This unbalanced consumption also exists in the area of water. In the United States the per capita consumption of water goes as high as 2300m3 annually. In Canada the figure is at 1500m3 while in Britain it reaches up to 225m3. On the other hand, the developing countries have a much lower consumption, of between 20 and 40m3. The trends of usage for the forest goods plus several of the other goods comprise of a similar direct proportion to the figure of population of the 20% of the wealthiest communities. Due to such extravagant demands, a great burden is being placed on the national as well as the world’s natural resources. The other societies make up to about 80% of the population, and get less than 20% of the world capital. The consumption of these societies is much more humble. Environmental Challenge Presently, there is not enough attention, at least not in the degree that is required, being paid to the social concerns. Scientists are pointing out to the troubles that we are facing and which would make our survival difficult later on. Such troubles include warming globe, the earth’s ozone layer being depleted, the deserts consuming agricultural land. However, we are not responding to the warning in the appropriate manner; instead we ask them for further details. Initially it was thought that environmental degradation is primarily the concern of the richer countries and happens due to industrial affluence. However, now it is an issue for the developing countries as well. The very poor countries are caught in the descending coil of associated environmental and economic decline. Although there are hopes being expressed at every side, no pattern can be seen nor any kind of campaigns or rules which would console the poor and decrease the increasing gap between rich and poor countries. For the purpose of â€Å"development† we have collected weapons which can divert routes, which had been pursued since millions of years, and can form such a planet that our ancestors may not identify as being theirs. The biodiversity in the European continent is rapidly going down. Although Europe can be termed as wealthy and strong it does not seem that it has the practical ways for avoiding the decline. Birdlife International (Conservative Series 3) conducted a study and the results showed that 40% of the bird species are in an â€Å"unfavourable situation†. Since the past two decades the there has been a â€Å"substantial reduction† in one in four of Europe’s 514 bird species. It is ironic that such occurrences took place in the same years when there were the most conservative efforts made. A re-strengthening of the European legislation has taken place, there are now more nature reserves and parks, and certain species which had disappeared in the area have been reintroduced. Concerning this issue, in 2003 the European Research Commissioner Philippe Busquin said: â€Å"The time has come for coordinated European action to turn the tide on environmental threats†¦ For too long, we have exploited the Mediterranean and Black Sea areas, without considering the eventual consequences of our actions. We must invest in integrated programmes of research to deliver sustainable development solutions and long-term environmental protection for the benefit of our future generations. † (Europa, 2003). In 2008, the European Commissioner for Environment Stavros Dimas publically addressed the audience at Harvard University and talked over this issue. Dimas related what the European Union’s â€Å"ambitious environmental agenda† is. This included targeting 20% decline in the consumption of energy by the year 2020. This was, internationally, the first plus the greatest emissions trading plan. According to Dimas the agenda also targeted at using more and more of sustainable and renewable resources. Along with this Dimas emphasized that it is vital for there to be global collaboration on matters like climate change, biodiversity loss, and deforestation. The western world takes Eastern Europe as the place where there are smog and toxic spills. The priority of the communist regimes had been to intensify industrialization. Even though certain environmental rules exist in many areas and they were similar to those in the Western Europe, these were hardly ever implemented. Polluted rivers, toxic waste dumps, and the terrains and cities being blackened by soot was the consequence. The environmental standards of the European Union are harsh and these have been pushing these nations for the cleaning up of their ecological destruction regions. 15 years of leniency has been given to the states that have recently joined the union. However, this leniency is only for those regions where much investment is required, for example the building of water purification schemes. Several of the areas are already showing the signs of the clean-up attempts. For instance, there is the Black Triangle in Poland, Germany and the Czech Republic. This area was once of the most polluted regions globally. It supplied energy to the heating and heavy industries through the power plants which worked on coal. Due to this whole forests were destroyed. However, by 2000 there had been such a significant change due to the efforts that emissions of sulphur dioxide and solid particles were lessened by greater than 90% (Habeck, 2004). Other Challenges At the time when the terms of reference of the Commission were is discussion in 1982, some of the individuals proposed limiting the concerns to only â€Å"environmental matters†. This would not have been feasible. In fact it would be considered a major fault. The environment is not separate from our actions, determinations and requirements, and efforts to save only that and not look at other concerns would make the word â€Å"environment† a nuance of gullibility in certain political spheres. Certain others have restricted the term â€Å"development† to quite an inadequate centre, along the lines of â€Å"what poor countries should do to become richer†. Therefore, those in the global scene mechanically dismiss it as being something that the experts are to worry about, and the ones concerned with queries regarding â€Å"development assistance†. European expansion (Organisation for Economic Cooperation and Development [OECD], 2006) has formed a new â€Å"rural† Europe. Certain of the rural areas of Central plus the Eastern Europe are being structurally transformed (Fraser, 2005). Simultaneously, in Europe and the member nations social services are being subjected to modernisation and improvement (Kumar et al. , 2003). The researchers who are on the lookout for the construction of a dependable rural evidence base are facing confronts. They wish this to inform policy decisions and practice (European Commission [EC], 2006a; OECD, 2006). One of the challenges that they face happens to be the speed of transformation and the requirement for latest research (Commission for Rural Communities [CRC] 2006a). One more is the problem that they face to arrive at a mutual explanation of each of the two rural regions plus the social services so as to conduct a relative research in the European continent which is quite a varied region. Europe is also facing challenges in the area of labour. When the Europeans lose jobs they get upset. This may happen because of inside rivalry in the European Union or because of the international competition that they face from other continents like Asia, and also from Latin America and the United States. In those regions the European carmakers have initiated their plants. The private sector has not been forming any significant number of new jobs since as early as the 1970s, and about 20 million Europeans are not employed of which several may not be ever. Recently there was a survey held in Italy and the results showed that 38% of the participants though unemployment to be the most urgent challenge. This view was held by 58% of the respondents in France, whereas in Germany the figure was as high as 81%. The big nations that are at the centre of the euro region are languishing in the economic area but still they do not seem capable of coming to grips with the opening transformations which are required in such a planet of globalisation, spirited labour markets, and the portable capital pressures of our economies. In the situation when a European loses his job because of his firm setting up in India instead, it is probable that he would not get another job. Plus due to the reducing demographic base the liberal pension systems are being threatened. Several of the European nations are going down and are not being able to sustain their people. For example, by 2050 the population of the Italian nation would go down, from a 57 million to 45 million. By the same time greater than half of the population in Germany would be above 55 years of age. Europe requires that immigration takes place. But this happens to be a contentious means of raising the workforce, since there is a prevalent dread of a rising Muslim population. What is more important? The â€Å"environment† is the place where we live and for improving ourselves in the environment there has to be â€Å"development† taking place. That is to say that the two are indivisible. Additionally, the matters related to development should be perceived by the political chiefs as being important, as they think that their nations have achieved stability and the other countries should struggle at attaining that position. The routes that the industrialized countries take for the purpose of development are obviously indefensible. The decisions that such nations make for improvement, due to their large economic plus political authority, would greatly affect the capability of each person for the sustenance of human growth. This would not be just for them but also for the further generations ahead. Several of the important survival matters concern unbalanced expansion, poverty and population growth. All of these issues extraordinarily pressurize the world’s lands, waters, green areas, plus also other natural resources, not least in the developing nations. Chances and resources are wasted through the downward spiral of paucity and ecological deterioration. Especially it is wasting the human resources. Such associations between paucity, inequity, and ecological deterioration created a significant matter in the assessment and recommendations. There is a requirement of a new period of economic expansion. This expansion has to be powerful but also socially and environmentally sustainable. â€Å"The search for a demanding dynamic balance between economic prosperity, environmental responsibility and social safety is certainly the essential civilizational, and consequently also political, task of the first half of the 21st century† (Plut, 2000: 149). The geopolitical part and situation of Europe had been altered drastically since the past some decades. Being the backing for the European continent, the EU reacted in two methods to the market-, technology- and information-related confrontations of globalisation and the macro regional rivalry with the United States and Japan: with development and nearer interrelation. Nevertheless, the fact that whether the nonexistence of a wide-spread domestic marketplace had been the chief cause of a low level of rivalry of the international firms in the European continent is arguable. In the 1990s an even European Union market had been set up and this allowed for a more essential development of a shared policy also regarding the environment, transport, and communication network. In several ways the expansion of environment rules can possibly be recognized with a past of democratization of the European Union. The EU nations accepted the Amsterdam Treaty in the June of 1997 and its environment related content was influenced a lot due to the deepened political pressures plus also good structured agendas of non-governmental environmental groups and green political parties. Because of the several past environmental pressures in the AC10, the procedure of their modification to the environmental legislation of the EU15 may seem to be extremely challenging, enduring, and due to their reduced item quality and social disaster, in all probability also politically conflictnous. For the purpose of the incorporation into the European Union and also for the modification of the ecological legislation there would be a requirement of capital and this may turn out to be a great burden. The EU15 and the AC10 nations have similar environmental objectives. However, their initial situations, the time, and the means of change are far from identical. AC10 faced economic and social disasters in the beginning of transition and because of this there is no worry for the environment among them both; the people and the government. In 2000, the AC10 had just started developing environmental action programmes and also incorporating the European Union environmental principles into their legislations. Before the EU environmental policy and rules can be adopted completely, there is an anticipation of a longer modification era. There is an anticipation of this era especially in the area of transport, energy sector and agriculture (European Environment Agency, 1999). There are fears of AC10 repeating the mistakes, that the EU nations committed in the 1970s, in the probable era of heavy economic expansion between the years 2000 and 2010 (2015) (Plut, 2000). Conclusion Because of the deterioration of the environment the public health is being affected drastically and it is also leading to social inequity. For the meantime, the economically strong countries who are the causing it escape efficient management by the public. Under the new-liberal stick, environmental, communal and autonomous matters have previously not appeared to be so nearly connected. The effects happening due to the destruction of the environment have affected the developed nations along with the third world nations lately. Such effects have been in, for instance, the health. According to recent studies, hundreds of deaths taking place annually in the major European cities are due to the air pollution which happens because of the too much vehicle traffic. Several others have to undergo chronic asthma, this too for the same reason. Similarly, a large number the young people are suffering from leukaemia. These are the ones who live near waste recycling and storage centre near the Hague, Holland. Industrial pollution is also affecting the babies and infants and they are going to endure it throughout their lives, not only medically but also socially. Water resources are going down, so much so that there is a danger of scarcity. Whatever amount still is there has a poor quality. This is resulting in high prices of water and because of this an increasing number of people cannot get the municipal water supply since they cannot afford to pay the charges. Certain extremely poor Europeans even have to make use of mineral water due to the fact that they are not getting water in their taps. Such kinds of situations should provoke an environmental sense to be at the centre of attention. Concerning biodiversity, the environmental requirements of Europe, just like in other regions, challenge the fundamental judgement regarding the market system that is governed by great, private welfare. It has been frequently thought that environmental requirements are a mere â€Å"luxury†, or at the minimum not the most important issue to be worried about, in front the prevalent social crisis. Nevertheless, suggestions of environmental catastrophe are very well felt in the north and the south and they are reaching an increasing scope of views of our situations of life. Environmental matters have to be handled today, and not simply left for later years. This fact should have been taken into consideration previously; it should be considered even more now. References Anon. (2003). Turning the tide on environmental degradation: the EU examines ways to reverse damage in the Mediterranean and Black Seas. Europa, [Online] 28 May 2003. Available at: http://europa. eu/rapid/pressReleasesAction. do? reference=IP/03/769&format=HTML&aged=0&language=EN&guiLanguage=en [Accessed 9 May 2009]. Commission for Rural Communities (CRC). (2006a). Rural Disadvantage – Reviewing the Evidence. Cheltenham: Commission for Rural Communities. European Environment Agency. (1999). Environment in the European Union at the Turn of the Century. Copenhagen: EEA. European Commission. (2006a). Rural Development in the European Union – Statistical and Economic information – Report 2006. [Online] September 2006. Available at: http://ec. europa. eu/agriculture/agrista/rurdev2006/RD_Report_2006. pdf [Accessed 9 May 2009].

Petsmart Company Profile

Petsmart Inc. was founded in 1986 and is headquartered in Phoenix, Arizona. PetSmart is a provider of products, services and solutions for the needs of pets. It offers multiple lines of products for all the life phases of pets, and offers various pet services including: training, boarding day camp, and professional grooming. It also offers pet products through an e-commerce site, PetSmart. com, and operates a pet community site, pets. com. PetSmart also offers reptiles, fresh-water tropical fish, small pets, and birds. In addition, it provides pet services consisting of baths, teeth cleaning, grooming, toenail trimming, training, boarding, and day camp. According to Yahoo Finance, the company operates hospitals that offer boarding for dogs and cats, an on-call veterinarian, temperature controlled rooms and suites, daily specialty treats and play time, and day camp for dogs. The company does not sell dogs or cats, but provides space in most stores for adoption and animal welfare organizations to use. It features dog and cat foods, many of which are not available in supermarkets, warehouse clubs or other mass and general retail merchandisers, and also its proprietorship label foods According to Reuters, the company’s stores range in size from 18,000 to 27,000 square feet. It offers more than 10,000 items, including brand names, as well as a selection of its own brands across a wide range categories. PetSmart veterinary services consist of routine examinations and vaccinations, dental care, a pharmacy, as well as routine and complex surgical procedures. As of May 3, 2009, it operated 1,137 retail stores and 152 PetsHotels. Full-service veterinary hospitals in 734 of the company’s stores offer routine examinations and vaccinations, dental care, a pharmacy, and routine and complex surgical procedures. Medical Management International, Inc. operates 722 of these hospitals. PetSmart’s merchandise sales represented approximately 89. 6% of its net sales during the fiscal year ended February 1, 2009 (fiscal 2008). Merchandise generally falls into three main categories: hard-goods, consumables, and pets. Consumables merchandise sales includes pet food, treats, and litter. This categories sales comprised of 57% of its net sales in fiscal 2008. Pet services, which include grooming, training, boarding and day camp, represented 10. 4% of the company’s net sales in fiscal 2008. References _PETM: Summary for PetSmart, Inc- Yahoo! Finance. (n. d. ). Yahoo! Finance – Business Finance, Stock Market, Quotes, News. Retrieved March 5, 2010, from http://finance. yahoo. com/q? s=PETM_ _Reuters. com. (n. d. ). Business & Financial News, Breaking US & International News | Reuters. com. Retrieved March 5, 2010, from http://www. reuters. com/finance/stocks/companyProfile? symbol=PETM. O_

Creation Story Essay

Long ago, before the earth and all things in it, there was God Spongebob†¦. Spongebob said on the first day, â€Å"Let there be a ball of fire. To light us during daylight and burn those who sin against the law†. But then Barbie contested and suggested to change it into a disco ball so that everyone could party from night until dawn. On day two, Mickey Mouse defeated Lord Spongebob by drying him to death with a blower. He made the sky by means of cheese and nuts. On the third day, Mickey Mouse divorced his wife Minney and lived separately. Mickey opt to live underwater together with Aquaman while Minney stays on land with the butterfly fairies as they take good care of the flowers and trees. On day four , the sun, moon, and stars were created by the Justice League. On day five , thunderbirds, mermaids and fishes were created. On day six , Osama was God and he made politicians who considers themselves as animals of this world. They made people like them by uttering words of lies, battling during sessions in senate, rallying for higher compensation and cheating during elections. Other animals who were created are the kidnappers, criminals and policemen. Osama rested on the seventh day. He accidentally killed himself while testing one of his suicide planes. Cyclops saw it all and he said that it was good for Osama to die. With the help of the X-men, they made a garden home inside Noah’s ark on top of Mt. Everest. It was called the Garden of Chaos. He told them they could eat each other and rest in peace. The Aliens and Predators arrived during one of the NBA games and conquer the world. The only thing left were seaweeds, algae and underwater stuffs. Spongebob resurrected and decided to create a new world of his own. He named it the world of Autism.

How I Know My Mother Loves Me Essay

When I was very young, I was a sickly child. In fact, I had to spend most of my life away from school and in bed. Not surprisingly, I was miserable. I fretted a lot and constantly demanded my mother’s attention. I was a spoiled brat.During the day, I would demand that my favorite delicacies be served to me and that my favorite stories be read to me. At odd hours of the night, I would ask for a hot drink or a cookie, or just some company.†Mummy, stay with me!† was my constant whine.Not once was that demand refused. Not once did my mother groan or grumble. She answered every unreasonable demand of mine with unfailing patience. My mother would put everything aside to comfort me.My world was very small then. There was just me and Mummy. My world consisted of the feel of her cool palms soothing my brow and her floral scent as she leaned over me to tuck in my blanket. I remember her low voice, hushing me as I fretted about the pains in my joints. Most of all, I remember the look in her eyes, of deep concern for her sick child. That was how I knew my mother loved me then.Miraculously, I have outgrown my childhood ailments. Now that I am on the threshold of adulthood, my world has grown to include many exciting friends. Set free from the prison of the sickbed, I revel in the fun that the world has to offer.My relationship with my mother has suffered from my wild pursuit of fun. She criticizes my choice of friends and tries to enforce rules and regulations to curb my activities.Two nights ago, I stayed out way, way past my â€Å"curfew† hour, which is eleven o’clock. It was almost 1 a.m. when I reached my house. To make matters worse, I had been unable to call home to inform my mother that I would be delayed. There were no phones where we were â€Å"hanging out†. I knew that I was in for it!My mother flung open the door the minute she heard my friend’s car pull in. Her face was red, sweat was pouring down her temples. My friends made a quick exit as she ranted at me, her arms waving wildly. I didn’t say a word, in case one of those hands should find its mark on my face. I was ordered straight to bed.As I got into bed, she stood in my room, still ranting at me for my disobedience and â€Å"wild behavior†. I was tired. I just wanted to sleep. I looked up at her face to try to gauge if her scolding would be continuing much longer.Then I saw something familiar about the look in her eyes. It was the same look of concern that she had always had when I was so sick. I saw in her eyes all the fears that she had suffered that night as she waited for her daughter to return safely.This is how I know my mother loves me now.