The Latest Advances In Drug Manipulations Of The Immune System Essays

INTRODUCTION In order to provide a detailed analysis of recent pharmacological developments involving the human immune system, it is firstly necessary to introduce the innate and adaptive immune responses . Immunosuppressants and immunomodulators will be differentiated between and a selection of new and often experimental drugs belonging to each category will be provided. Specific drugs will be described including the pharmacokinetics and pharmacodynamics involved with each type. The possible clinical uses will be alluded to along with details from recent research. INNATE IMMUNITY Innate immunity is the first line of defence and comprises physical (skin), biochemical (complement, lysozyme) and cellular (macrophages, neutrophils) mechanisms (Katzung, 1998). All these mechanisms are non-specific, anti-microbial agents which work in conjunction with adaptive immune responses to provide a more effective system (Downie et. al., 1995). ADAPTIVE IMMUNITY The adaptive immune system is split into two mechanisms: humoral immunity and cell-mediated immunity. A basic understanding of these concepts is necessary for the purpose of understanding the specific effects of different immunopharmacological agents. HUMORAL IMMUNITY Humoral or antibody-mediated immunity is associated with B-lymphocyte cells. Antigens are foreign molecules that initiate an immune response, they have inherent immunogenicity (Tortora & Grabowski, 1996). Upon contact with an antigen, B-cells divide to produce a clone of plasma cells capable of the production of antibodies. Antibodies are immunoglobulins, modified blood proteins with a specific action against antigens. Five main sub-types of immunoglobulins have been identified of which IgG is the most abundant in bodily fluids (Hopkins, 1995). Several cells are known to initiate the process of plasma cell differentiation and are known collectively as antigen presenting cells (APCs) (Waller & Renwick, 1994). Lymphokines The antigen on the surface of the APC triggers TH-cells to produce hormone-like lymphokines (Lessof, 1993). Lymphokines are cytokines, regulators of the immune reactions which are produced by lymphocytes. Examples of these chemicals include interleukins, interferon and tumour necrosis factors. Their action involves the regulation of the proliferation, differentiation and activity of leukocytes (Dale et. al., 1994). The na... ...nours/himmun.html">http://www.pharm.uwa.edu.au/aussie/honours/himmun.html Kahan, B. D. (1998) History of Immunosuppression AT <a href="http://surgery.uth.tmc.edu/organ_transplant/historyimmu.html">http://surgery.uth.tmc.edu/organ_transplant/historyimmu.html Nijkamp, F.P. & Parnham, M. J. (1999) Principles of Immunopharmacology AT <a href="http://www.springer_ny.com/catalog/np/mar99np/3-7643-5780-0.html">http://www.springer_ny.com/catalog/np/mar99np/3-7643-5780-0.html Schultze, J. & Johnson, P. (1999) A Stimulating New Target for Cancer Immunotherapy IN The Lancet vol. 354, Oct. 9, 1999, pp1225-1226 Stadtlander Drug Distribution Co. Inc. (1998) Investigational Immunosuppressants for Transplantation AT <a href="http://www.stadtlander.com/feature/immunosuppren.html">http://www.stadtlander.com/feature/immunosuppren.html Swope, V.B; Abel-Malek, Z; Kassem, L. M. & Nordlund, J.J. (1991) Interleukins 1 Alpha & 6 & Tumor Necrosis Factor-Alpha are Paracrine Inhibitors of Human Melanocyte Proliferation & Melanogenesis AT <a href="http://www.biosyna.com/patent.htm">http://www.biosyna.com/patent.htm

Joyces Clay an Explication Essay -- essays papers

Joyces Clay an Explication Maria is a humble woman leading a life tinged with longing. She recognizes and values her independence, yet at the same time moves in a tide of inevitability towards the place molded out for her within the relatively staunch social caste system of Dublin. The substance of her individuality is put in jeopardy by is plasticity to external forces; she is a woman made of clay. It seems her calling within society is that of a nun, however it is evident that still flickering insider her is the dream to escape this imposed destiny, to live a life like the one depicted in the song she sings, I Dreamt that I Dwelt. The fundamental conflict between Maria's individuality and the pigeon holing forces of society is the underlying tension of the story. Joyce makes us feel that her chances are slim in standing against the currents leading her towards life in a convent. However, Maria's destiny is far from written, both literally and metaphorically, and so we are left with the esperance, however sm all, that she may break of the manacles of her born position and dare to lead a truly independent life. Maria is all things of a woman predestined to enter a convent. Even her name, meaning Mary, points to this ecclesiastical inertia. Early in the story it is Joe who says of her, "Mamma is mama but Maria is my proper mother." (Joyce, 96) Joyce knows in writing this the probability that all our minds will immediately spring to the a likely connection: that of the Mother Mary. Adding to this composite portraiture are Maria's tendencies of phrase, "Yes, my dear and No, my dear" (Joyce, 95) which, in our minds, easily adapt to the cliches of the convent Yes, my child and No, my child. Further, Maria is regarded as a "ver... ...use of selfless and humble nature of Maria, to wish for her the life she sings of in I Dreamt that I Dwelt. We fear however, that the likelihood of her ever leading a life so full of freedoms is made slim by her tragic inability to assert herself. Joyce forces the attentive reader to consider her place in society, and to examine how the balance plays out between the inner forces of self and the outer forces of society. In the end, after Maria has omitted the second verse of her song, the narrator tells us that "no one tried to show her her mistake." We are left to wonder if this instance is to be understood as representative of what the future holds for her. Will Maria ever be shown her mistake? Will she come upon it herself in a moment of introspection? Joyce is only mute to these queries, leaving us gently where he picked each of us up, to our own imaginations.

Business Model of Toyota :: essays research papers

Business Model of Toyota As one of the leading automobile manufacturers in the world, Toyota ranks within the top three worldwide. Due to their unique business model, they are now have a market share of 14% in the first four months of this year. That is an astonishing 2.3% jump from the previous year. According to Autodata.com, the Toyota City based automaker ranks fourth in United States sales. We have determined that their business model is an Integrated Low Cost – Differentiated Strategy. It involves finding the lowest operational cost along with a unique niche or strategy that separates them from the competition. Toyota’s new statement â€Å"Moving Forward†, reflects their plans and expectations for the future. This includes the known and the unknown factors that a business must face. In 2000, Toyota launched a new cost effective strategy called CCC21 (Construction of Cost Competitiveness for the 21st century), for Low Cost operational expenses. With this aspect Toyota plans to advance such initiatives globally, based on its policy of purchasing the world’s best parts at the lowest cost with the shortest lead times. According to Toyota, they have undertaken a manufacturing revolution that has fundamentally changed established practices; all the way back to the product development and design. They have done this by integrating four areas: design, production engineering, procurement, and component supply. They have achieved higher quality at lower costs by creating standardized, multipurpose components. Also the reduction in cost has heightened the value and fortifies the competitiveness of product. To do this, Toyota has required intensive coordination with its suppliers. Another factor of their Integrated Low Cost is that Toyota steadily feeds cost improvements back into the product to raise their value along with the fact that four Toyota’s seven corporate auditors are outside corporate auditors. Toyota’s Integrated Differentiated Strategy is very unique to the automotive industry. Its main focus, according to the president of Toyota, is that Toyota is not trying to rival other automakers; Toyota is trying to conquer customers with great products and service to obtain high customer satisfaction.

Reflection Paper No

What is the philosophy in your life? Explain the meaning. How did you arrive on that philosophy in your life? How will you apply in this philosophy in your everyday life? Everyone has philosophy in his or her life. In identifying and knowing the philosophy of every person's philosophy in life it could show the identity the personality and the characteristics of a certain person.But how about mine? What is the philosophy in my life? My philosophy in life is, â€Å"Success is tampered with the harsh realities in life. As look and re-read my philosophy in life is that it looks very simple, it is understandable, but the meaning of the philosophy in my life is not simple, it is not just as easy as that are being written and be read.I said this because the meaning of my philosophy is this, there is no victory unless a person will tackle and will experienced the bad and the wicked things that will give the person's life the downfall, but looking back to the realities that corresponds the r eal meaning f life is that there are the things that will make you feel worse, that even there will be a time that you will hate your life, and because of that it will result to the discouragement of achieving your ambitions, or your goals that will represent as the successes in life, it will also affect because discouragement will interrupt in getting on it, but as the others are telling that because of these trials, it will ensure that you have colors in life, that there is the meaning in your life. So instead of looking these trials as a problem, it is otter to say that, these problems gives me strength and use it , and make myself up and surely because of these it is surely because of the learning from the problems, it will help as a tool in achieving ones person achievement.

History of Aluminum Essay

atomic number 13 as a surface came to its being only 200 twenty-four hourss ago. However, Dmitry Eskin noteworthy that almost 2000 years ago, Pleny the older mentions a strange, light, and silver greyy metal in his Historia Naturalis which might indicate that aluminium may have been discovered accidentally and matchly forgotten (Eskin 2008, p. 1). Citing the work of Pleny the Elder, Eskin puts it One day a gold smith in Rome was allowed to show the emperor moth merelyterfly Tiberius a dinner plate of a refreshing metal. The plate was very light, and almost as bright as silver.The goldsmith told the emperor moth that he had make the metal from arena clay. He in addition assured the Emperor that only he, himself, and the gods knew how to produce these metal from clay. The emperor felt immediately, however, that all his treasures of gold and silver would decline in value if the great unwashed started to produce this bright metal of clay. Therefore, kinda of giving the goldsmith the regard expected, he ordered him to be beheaded (p. 1).The existence of this young metal was established by an Englishman H.Davy in 1808 which he echoed aluminium, but this frame was later changed to aluminium (USA). Thus, both aluminium (U. K. ) and aluminium continues to be use to call this metal. Nevertheless, it was not until 1825 that pure atomic number 13 was extracted by the Dane N. C. Oerested, though actually, he was only able to produce tiny amounts.Eskin pointed out that in the midst of 1827 and 1845, the German F. Wohler essential the frontmost performance to produce aluminium powder by reacting potassium with anhydrous atomic number 13 chloride (p. ). It was also Wohler who determined some physical properties of aluminum such as its density which according to Eskin, appeared to be the most remarkable indication of the new metal (p. 1). Citing the description of Jules Verne around this newly discovered metal in his From the Earth to the Moon i n 1865, Verne wrote This rich metal possesses the whiteness of silver, the indestructibility of gold, the tenacity of iron, the fusibility of copper, the agility of glass.It is easily wrought, is very widely distributed, forming the level of most rocks, is three times spark than iron, and seems to have been created for the purpose of furnishing us with the framework for our projectile (p. 2) By 1854, a cut chemist by the name of Henri Etienne Sainte-Claire Deville change the rule used by Wohler which facilitated the aluminum commercial convergenceion that resulted to the dropping of outlay from approximately $1200 per kilogram in 1852 to on the nose about forty dollars per kilogram in 1859.But aluminums damage remained bellly for voluminous use. Not huge when Charles Martin Hall discovered an chinchy method for the aluminum production. Mary Bellis noted that extracting pure aluminum was not indulgent as it is never found deliver in nature. This hindrance made alumi num a precious metal during this cessation, but with Martin halls invention of aluminum affector which was patented in 1888 had made aluminum processing easy that brought aluminum price down to an even glare at eighteen cents a jam (Bellis, Mary).According to the American society for metals, aluminum is the most abundant metal in the earths crust (ASM, ASM foreign Handbook Committee 1990, p. 35) was a learning of this century. It derives its name from the Latin alumen meaning bitterness. The ASM foreign utter that aluminum was first exhibited in 1855, but it was difficult to obtain during this period that it was more expensive than gold. During this time, companies producing aluminum had difficulty attracting buyers due to its high cost at $2 a lb.It was only later on one manufacturer discovered, it made good, inexpensive tea kettles that the price declined at cents a pound, and by the 1900 it was down to 32 cents per pound (p. 35). Production of aluminum however, was low until humanness War II, but in 1963, the aluminum industry which was undreamed of during the 1900, employed 35, 970 hoi polloi in 951 plants with payroll of $221, 567,000. Thus in the first seven months of 1968 alone, more than 412,000 Mg (450 tons) of aluminum were manikin in the unite States. John Gilbert Kaufman and Elwin L.Rooy pointed out that the first cardinal market for aluminum were the castings followers the commercialization of the Hall-Heroult electrolytic reduction process (p. 1). Kaufman and Rooy stressed that at first employment were merely limited to curiosities such as house numbers, hand mirrors, combs, brushes, tie clamps, and nonfunctional lamp housings that emphasized the light weight, facile finish, and novelty of the new metal (p. 1).Furthermore, Kaufman and Rooy cited that cast aluminum cookware was invented and was a congenial alternative to cast iron and heart pots, pans, and kettles (p. ). As the production of aluminum increases, its cost steadi ly declined, and by the end of the nineteenth century, grievous engineering application became economically viable (p. 1). From this point onward, the use of aluminum in some industry features prominently. Kaufman and Rooy stated that the use of aluminum played central role electrification. Aluminum was well suitable to the electrification demand of a low-density, corrosion resistant, and high-conductivity outfit and cable.Aluminum was also suited to contagious disease towers and cast installation hardware, and was also in demand to automotive pioneers who sought advanced materials and product forms to differentiate the performance and coming into court of their products (Kaufman & Rooy, p. 1). More importantly, Kaufman and Rooy noted that when the Wright Br others succeeded in unchewable flight, engine and other parts in cast aluminum represented the reference of a close collaboration with what would perplex the aviation industry (p. 1).The earliest mark rules for aluminum structures according to Randolph Kissell and Robert L.Ferry were developed at Alcoa around 1930 and were used to role the aluminum deck and floor beams installed on the Smithfield street Bridge in Pittsburg in 1933 (Ferry 2002, p. 217). After the publication of the American hostelry of Civil Engineers of an article entitled judicial admission for Structures of a Moderate Strength Aluminum Alloy of High Resistance to wearing in 1952 and similar other publications in 1956, major aluminum producers led by Alcoa as the number aluminum producer, followed by Reynolds and Kaiser began to developed structural design books for their product (Kissel & Ferry, p. 17).From this point on, aluminum has become important components of the construction manual series which include the following Section 1 specs for aluminum structures section 1A Commentary on Specifications for Aluminum Structure section 2 exemplifying Examples of Designs Section 3 Engineering entropy for Aluminum Structures and , section 5 Specification for Aluminum Sheet Metal give-up the ghost in Building Construction (p. 18). From its blue beginnings, the use of aluminum has evolve from honest curiosities such as house numbers, combs, pins, and other small items made from aluminum, to become an important material in almost blood line industries from automotive to aero space industry, to construction industry. infra is a classification table for aluminum which characterizes its description and its properties.