How the Industrial Revolution, post 1865, influenced migration and Research Paper

How the Industrial Revolution, post 1865, influenced migration and expanded civilization - Research Paper Example In this second industrial revolution, discovery and invention, acting as the catalysts played a major role in industrial and economic growth of the nation. These developments coupled with the developments in transportation and communications were responsible for the formation of organized industries with the emergence of big business empires in various industrial sectors such as steel and oil. Consequently the markets grew deep and wide for catering to the needs of the suppliers and consumers. These developments resulted into migration of people from different parts of the country to the urban industrial centers and different parts of the world to the US with the urban growth taking place at a rapid pace. These migrations were responsible for the diverse cultural background in the society. Industrial development The growth of industries was very fast during this period. The consumption of steel is an indicator for industrial development. The consumption of steel in the industrial and construction sector increased during this period and fuelled the growth of steel industry. The mass production of steel through innovative methods introduced by Carnegie made it cheaper and the demand for steel increased exponentially. This has accelerated construction of railroads across the country which stimulated the growth of business and industries by rendering mobility to the goods manufactured for reaching the customers throughout the country. Similarly, the growth of oil industry has changed the way the people were living in the US as its consumption was closely linked to general industrial growth, transportation and social life. Invention of telephone and telegraph aided industrial and economic growth further. â€Å"†¦the most dramatic improvement in the speed, breadth and reliability of news cov erage came with Samuel Morse's invention of the telegraph. Newspapers became the major customers of the telegraph companies, and the cost of telegraph transmissions led to the formation of wire services like the Associated Press, which was founded as a cooperative venture by New York newspapers in 1848† (Stephens). Freedoms to press, free market economy and the capitalist system of the country encouraged entrepreneurship, and it attracted people from all over the world to the US. The opportunities available in the industrial centers for employment, profession or education caused migration of people to urban areas. The new techniques used in agriculture have increased productivity. The proportion of people employed in agriculture has come down. The agricultural laborers from rural areas migrated to cities in search of employment. Steckel states, â€Å"The importance of migration to urban growth is also indisputable. Because birth rates were low but death rates were high, migra tion fueled urban growth during the 19th century. Indeed, many cities and towns would have declined in size without an inflow of people that replaced the excess of deaths over births† (p. 1). Capital formation and emergence of corporate companies Referring to New York Stock Exchange, Teweles & Bradley says, â€Å"The vast development of the railroads was particularly important to the Exchange since those corporations were the chief issuers of securities in the trading market. About 70,000

Psychological Treatment of Culturally Diverse Populations Research Paper

Psychological Treatment of Culturally Diverse Populations - Research Paper Example In contrast in 2000, the numbers fell down to 69%. The U.S. Census Bureau foresees that racial/ethnic minorities will constitute a numeric majority by the year 2050. However, other private researches made by the Council of National Psychological Associations for the Advancement of Ethnic Minority Interests (2000) anticipate that this demographic transformation will take place sooner. The following 2000 U.S. Census figures will provide us with an overall idea on some minority groups. The U.S. Census Bureau reported several conclusions on the bases of these statistics. Most importantly, they consider that it is impossible for the mental health clinician not to meet clients who differ in regards to race, ethnicity, and culture. Secondly, what is defined as therapy can vary considerably from the traditional understanding of the mental health professional. And last but not least, mental health workers have to become culturally competent in order to meet the needs of their clients. Attention to diversity and cultural competence and awareness are of great importance for the U.S. society since it has become increasingly diverse. In this paper I will focus my attention on ethical practice with patience from different cultural, ethnic and racial background. I will also concentrate on some recommendations for the psychological treatment of Mexican-American population. The American Psychologica... Guidelines for Providers of Psychological Services to Ethnic, Linguistic and Culturally Diverse Populations (APA, 1993) suggest comprehensible counseling and flexible perspectives for working with such individuals. It is of great importance that each psychologist remains sensitive to diversity issues and possesses general knowledge about the groups that seek mental health treatment. The American Psychological Association Ethics Code (APA, 1992) requires that psychologists are aware of "cultural, individual, and role differences" and "accord appropriate respect to the fundamental rights, dignity, and worth or all people (Principle D: Respect for People's Rights and Dignity, p. 1599)." Further, the psychologists are instructed by the APA Ethics Code (1992) to acquire the necessary training if he is to work with individuals of diverse background. Having the knowledge about the client's culture will aid the therapist to incorporate into the mental health treatment traditional spiritual and healing customs and will reinforce the partnership between the therapist and the patient. Aviera (2002) reports on multiple occasions when disclosing personal details "helps the Latino client feel that the therapist is a caring and real person (p.18)." Familiarity with one's culture, openness and genuineness of human interactions are of prime significance if the psychologist aims to work effectively with culturally diverse client. According to the numbers provided by the 2000 U.S. Census over 35 million identify themselves as Hispanic, which approximately makes 13 % of the total U.S. population. The majority 58.5% are of Mexican origin. Barona (2003) reports that "many ancestors of present-day Mexican Americans resided on this land when national borders were established more than

Anti-aging Mechanism Using Bacteriphages | Experiment

Anti-aging Mechanism Using Bacteriphages | Experiment We all have been familiar with many infectious diseases since many centuries ago. Some bacteria have killed millions of our lives, some viruses have great potential to consume many people health and wealth and both are still hugely haunting our humankind. We did discover Penicillin, scientists have developed many antibiotic and antiviral drugs to kill and combat against these bacteria and viruses. This is the war that will have no end. I have been thinking and studying about these microorganisms since my undergraduate degree emphasizing about the diseases and their basic features. In this study, I wanted to explore many facts about the bacteria and viruses for advantages of our medical sciences and I found out that there had been many researches and discoveries about using the bacteria and viruses for our goodness and amazingly there will be more and many potential for our future medical sciences. The most interesting thing I have studied is the prokaryotic viruses called Bacteriophage and they really have the very strong potential to be used as a weapon against many infectious diseases including multi drugs resistant bacteria infection and against cancer such as very deadly brain cancers and even the possible cure of many types of cancer by selectively targeting only the cancer cells without affecting the normal ones and I also have studied about the telomerase enzymes that have the potential against human cellular ageing. OBJECTIVES OF MY INDEPENDENCE STUDY As we are living on the world interacting with the ecosystems containing different sorts of unicellular and multi cellular organisms, most of our evolutions and pros and cons are tightly associated with these organisms and the first objective of my study is to know or link the beneficial effects we may obtain from our organisms by understanding them and also understanding ourselves scientifically. To know and if possible, to propose or to make the steps to develop very effective possible future anti cancer treatment using bacteriophage. To propose the possible anti-aging mechanism using bacteriphages. To develop drug which can be effectively used for the many multi drug resistant bacteria infections such as multidrug resistant Tuberculosis using bacteriophages and to identify the possible methods for the drug development and their respective infectious diseases with the delightful and precious help from my supervisor SCOPE After studying and emphasizing upon the general main advantages that we get from the bacteria and virus for our medical sciences, I want to focus my study upon the Bacteriophage viruses which can possibly be used as a vector for gene therapy and gene regulation for my desire against aging of human being and in another word against our inevitable part of our human life called death. Another scope is to use the phage as very specific cancer cell killing agent for many tumors containing specific surface markers or receptors such as brain cancers. I want to study by reading books and journals and also with my innovative thinking step by step, from general to details and to solve all the questions as much as I can and then to propose the very new techniques using molecular levels and receptors levels. Schedule If we want to know something, we must first understand it basically and so, my very first important thing to do is to know about the general important and some very detail characteristics of the bacteria and viruses. Without the general knowledge of them, it is not possible to find out more about them. Many reference books and internet links and help me with this part and to know the many beneficial effects of them for Medical Sciences. After this, my important plan is to study deeply inside the bacteriophage viruses and their current and future usage for Medicine and then accessing the knowledge with my innovative thinking and advices of my supervisor I hope that I will be able to learn, study and find many things about for Medical Sciences. 2. Bacteria 2.1: Introduction to bacteria All prokaryotic organisms are classified as bacteria and they are divided into eubacteria which includes all the bacteria of medical importance and archae-bacteria which is a collection of evolutionarily distinct organisms. TYPICAL BACTERIA: Most of them have shapes such as rod like, sphere or corkscrew. Their cells are smaller than the eukaryotic cells and all of them except the Mycoplasma have the rigid cell wall surrounding the cell membrane. Apart from the shapes, the cell wall defines whether the bacteria are Gram Negative or Gram Positive. Bacteria cells reproduce by binary fission. Atypical Bacteria are the distinct bacteria groups lacking of significant characteristics structural components or metabolic capabilities. They includes Chlamydia, Rickettsia and Mycoplasma etc. 2.2 ADVANTAGES OF BACTERIA FOR OUR BODY AND MEDICAL SCIENCE Although bacteria can cause many diseases and health problems to human being, they also have many beneficial effects for our human body and medical sciences. NORMAL FLORA: Many different micro-organisms mostly bacteria are continuously inhabiting the human body without giving any harm. Human body is usually sterile when a healthy new born enters the world. But, after birth, the body acquires normal flora from the environment and food. The very important fact is that the species of that flora can not be rigidly defined because they differ from one individual from another as a result of physiological differences, diet, age and geographic habitat. NORMAL FLORA AGAINST THE INVADING HARMFUL INFECTIONS The bacteria need receptors and nutrients for their metabolism. The invading infections will face with the competence of normal flora for these essential receptors and nutrients. Some bacteria of the bowel can even produce the antimicrobial substances so that the invading organisms can be killed. But, the substances producing bacteria themselves are immune to their own substances. These effects can reduce the possibility of the infectious diseases and act amazingly as a defense mechanism against the infections. GERM FREE ANIMALS: The significant of the normal floral are now well explored by studying the germ free animals which have no normal flora as conventional animals. They are produced by special cesarean sections and then they are maintained in special isolators. Experiments showed that in the germ-free animals, the alimentary lamina propria is underdeveloped, the motility of the GI tract is reduced and the intestinal epithelial renewal rate is just half of the normal conventional animals. In studies with antibiotic treated animals also suggest that the normal flora can protect our bodies from the pathogens. The researchers first treated the animals with Streptomycin to reduce the normal flora and then made them infected with the Streptomycin resistant Salmonella bacteria. In normal condition, about 10000000 Salmonella were needed to cause the establish infection but in Streptomycin pre treated ones, only 10 organisms were needed to cause infection. NORMAL FLORA FOR OUR IMMUNE SYSTEMS Bacteria colonization of a new born infant is the very powerful stimulus for the development of immune system. The studies showed that the antibodies concentration after infections is significantly reduced in germ-free animals indicating the defect in acquired immune system. Bacteria are also the important providers of important nutrients such as Vitamin K and they also help with digestion and absorption of nutrients. REFERENCES LIPPINCOTTs ILLUSTRATED REVIEWS of MICROBIOLOGY 2007 EDITION INTRODUCTION TO BACTERIA , page 1 -6 Normal Flora Page , 7 10 KAPLAN USMLE TEXT BOOK (MICROBIOLOGY)2009 EDITION HARRISONS PRINCIPLES OF INTERNAL MEDICINE 2006 3. VIRUSES 3.1 INTRODUCTION TO VIRUSES A virus is an infectious agent containing genome which is either RNA or DNA and a protein capsid designed to protect the genome. Many viruses have additional structure like envelope which is protein containing lipid bi-layer. The sort of nucleic acid in the virus is the most fundamental and important of properties of virus. The nucleic acid may be single stranded (ss RNA ss DNA) or double stranded (ds DNA or ds RNA). The Single stranded RNA genome are subdivided into the positive (+) polarity which is, of messenger RNA sense that can be used as template for protein synthesis. Negative (-) polarity or antisense which is complementary to the mRNA sense and so they can not be used as temperate for protein synthesis directly. 3.2 THE REPLICATION CYCLES OF VIRUSES The cycle begins with the attachment of the virus to the host cell called adsorption phase, 1. ADSORPTION: The initial attachment of a virus to the host cell is with the interaction between specific molecular structure on the surface of the virus and receptor molecules in the host membrane that can recognize the structure. The receptor molecules on the host cell membrane are specific for the family of the viruses and they are the molecular structures that usually carry out normal cell functions. The receptors for the viruses are present only on specific cells or are unique for one animal species. So, the absence or presence of the host cell receptors is so important determination for the susceptibility or resistance of a species to a given virus. If we can genetically manipulate the specific receptor affinity for the viruses, we will be able to attack or kill or change the desired targeted cells. Fig: HIV virus adhering to the cell, attachment is accomplished by the SU fragment of the env gene product on the surface of the HIV which binds to the CD4 molecule. So, the HIV viruses can only infect the helper T cells, monocytes and dendritic cells which contain the CD4 protein in their cell membrane. 2 PENETRATION: The two mechanisms the virons enter the cells crossing the cell membrane are the receptor-mediated endocytosis: the viron binds the cell surface receptor and the cell membrane invaginates enclosing the virion in and endocytotic vesicle (endosome). The virion then enters the cytoplasm by various mechanisms depending upon the viruses. It is facilitated by one or more viral molecules in general. C:Documents and SettingsuDesktopendoem.jpg f Membrane Fusion: Some enveloped viruses enter the cell by fusion with their envelopes with the membranes of host cells. Glycoproteins of the envelope can promote this and viral membrane then still remains associated with the plasma membrane of the cell and just the nucleocapsid is released into the cells. HIV viruses enter the cells by this fashion. 3 UNCOATING: This is the stepwise process of disassembly of the viron that enables the expression of the viral genes that carry out viral replications. Most of the steps occur inside the cells and depend on cellular enzymes and in rare occasions, newly synthesized viral proteins are needed to complete the process. The loss of one or more structural components of the viron will lead into the loss of ability to infect another cells reflecting as the eclipse period of the growth curve. 4 REPLICATION: DNA virus replication: There is a wide macromolecular event variation between families of viruses for the replication processes depending primarily upon the viral genome sizes. The smaller the viral genome, the more the virus must depend on the host cell to replicate. Also the mechanisms of replications for ss DNA viruses and ds DNA viruses are different. RNA virus replications Type 1: RNA viruses with a single stranded genome of (+) polarity that replicates with complementary (-) strand intermediate. In this, the infecting parental RNA serves as both mRNA and later as a template for synthesis of the complementary (-) strand. Type 2: Viruses with ssRNA genome of (-) polarity which replicate with a complementary (+) strand intermediate. (-) polarity genomes have two functions, one is to provide information for protein synthesis and the second is to serve as template for replication. But they can not accomplish without prior construction of complementary (+) strand intermediate. Type 3: Viruses with ds RNA genome: dsRNA genome is segmented, with each segment coding for one polypeptide. But, the eukaryotic cells do not have the enzyme to transcribe dsRNA. So, mRNA transcripts are produced by virus-coded, RNA dependent RNA polymerase (transcriptase) located in the sub viral core particle. This particle contains dsRNA genome and associated viral protein, including the transcriptase. In replications, the (+) RNA transcripts are not only used for translation, but also as templates for complementary (-) strand synthesis, resulting in the formation of dsRNA progeny. Type 4: Viruses with a genome of ssRNA of (+) polarity that is replicated with with a DNA intermediate: the conversion of a (+) strand RNA to a double-stranded DNA is accomplished by an RNA-dependent DNA polymerase, commonly known as reverse transcriptase, which is contained in the virion. The resulting dsDNA becomes integrated into the cell genome by a viral integrases action. Viral mRNA abd progeny (+) strand RNA genomes are transcribed srom this integrated DNA by the host cell RNA polymerase. 4 ASSEMBLY AND RELEASE OF PROGENY VIRUSES: The assembly of the nucleocapsids generally occurs in the cytoplasm for most RNA viruses and in the nucleus for most DNA viruses where the viral nucleic acid replications take place. REFERENCES LIPPINCOTTs ILLUSTRATED REVIEWS of MICROBIOLOGY 2007 EDITION , Unit-Viruses , 233-243 KAPLAN USMLE TEXT BOOK (MICROBIOLOGY) 2009 EDITION HARRISONS PRINCIPLES OF INTERNAL MEDICINE 2006 EITION BACTERIOPHAGE Introduction to Bacteriphages Bacteriophages are the viruses that replicate inside the bacterial cells. It contains nucleic acid encapsulated by the protective protein coat. The nucleic acid may be DNA or RNA depending on the phage and may be single stranded and some are double stranded ranging from the length of 3000 bases to 200,000 bases. The replication starts with the attachment of the virus to the receptors of the cell surface of bacteria. Then the phage injects the nucleic acid into the cell leaving all or most of the protein outside the cell. This is the obvious difference between the virus that infects the vertebrates and the virus that infect the bacteria. In former case, the virus is entirely taken up by the cell and its nucleic acid is released inside the cell. (1) The phage nucleic acid takes over the biosynthetic machinery of the cell to replicate its won genetic materials and to synthesize phage specific proteins. When new phage proteins and new phage DNAs have accumulated, they self-assembly into mature phage particles, the phage specific enzyme ( lysozyme ) that dissolves the bacterial cell wall and the phage is released from the bacteria. A single phage can produce millions of progeny at the expense of bacteria cells in culture. (1) (2) 4.2 Virulent phage Phage are classified as virulent or temperate depending on the nature of their relationship to the host bacterium. Infection of a bacterium by the virulent phage results in the lysis of the bacterium and death releasing newly replicated phage particles. One phage can produce hundreds of progeny within twenty minutes under optimal condition. The interesting thing about that virulent phage is that the phage that attack one bacterial species do not attack other species. (1)(2) That is a huge advantage to use phage as an antibiotic because the phage against E coli bacteria will only kill that species and will not affect the others including the normal floral of our human body. So, they will be the most specific antibacterial agent. (1) (2) 4.3 Temperate Phage The temperate phages are different from the virulent one in that they have two possible fates after infecting the bacterium. Some cause the lysis and death of the bacterium just like the virulent phages do but they do have another alternative outcome. After entering the cell, the phage DNA integrates with the chromosome of the host cell. During this state (prophage) the gene expression of the phage is continuously by a protein (repressor) encoded by the phage genome and therefore no new phage particles are produced, the host cell survives and the phage DNA replicate as part of the host cell. (1)(2) 4.4 LYSOGENIC BACTERIA The bacteria which carry the prophage are called lysogenic bacteria and this phenomenon is called LYSOGENY. The association of the phage and the bacteria is very stable unless the host DNA damage or the exposure to the ultraviolet light occurs. When the DNA damage occurs, the repression of phage gene is lifted and the lysis occurs and the host cells die. (1) (2) 4.5 MOLECULAR DETAIL OF LYSOGENY In Lysogenic mechanism, the genes for the lytic process will have to be turned off and this process is caused by the phage coded repressor gene. This may be proteins or sometimes anti sense RNA. The repressor genes can turn off almost all the transcriptional initiation and so most of the gene transcriptions including the essential ones for the lytic mechanism are inhibited. But the repressor gene acts only onto the few promoter genes and the gene for lysis mechanisms in late part of the processes are only indirectly inhibited by the lack of early gene transcriptions tuned off by the repressor proteins or anti sense RNAs. The early gene products are needed to activate the subsequent gene expressions and their absence make the whole lysis process inhibited. The repressors also promote their own transcriptions to ensure their functions. The lysogenic state is very stable and only one in 100000 cell divisions may undergoes lysis by spontaneous activation. There are also many ways to stop the lysogenic state in experimental such as heating in which the repressor proteins become denature, treating with the UV ultraviolet light in which the specific system called SOS system of the bacteria is activated. The SOS system is the global regulatory system which responds to DNA damage. The breakdown products such as oligonucleotides activate the Rec A proteins co-protease activity and this protein in turn inactivate the main protease protein called LexA and then repressors and the lysogeny state is ended. (1) (2) There is also a type of protein called anti-repressor protein and they inhibit the repressorss activities and this anti-repressor synthesis is turned off in the lysogenic cells by the maintenance protein called Mnt protein. CII gene: In order to achieve the stable lysogenic state, both the establishment of the repression of the lytic gene and the integration into the chromosome of the cell are needed. CII is a transcriptional activator which is coordinated with the lysogeny. Within the CII gene, the gene called CI gene which transcription needs the CII-dependent promoter establish the repression of the lytic genes. This promoter is activated only for a short period during lysogenization and after the repression has been established, the CII gene is repressed itself. The CI gene is then transcribed only from the pM gene which is the maintenance promoter gene. The another protein called Integrase which is essential in integrating of the phage nucleic acid with the chromosome is also transcribed from the CII dependent promoter called PI. The pAQ which is also the CII dependent promoter makes an antisense transcript that opposes the Q gene expression. Q genes products stimulate the late gene expression and late gene products which could kill and lyse the cell and they are not made by the CII expressing cells and so the CII gene is so essential for the lysogenic state and only these cells expressing CII gene effectively become lysogenic cells. (1) (2) REFERENCES LIPPINCOTTs ILLUSTRATED REVIEWS of MICROBIOLOGY 2007 EDITION Bacteriophage in chapter 7 Bacteria genetic , gene transfer , Page 60-61 RICHARD CALENDAR THE OXFORD TEXT BOOK OF THE BACTERIOPHAGE 2nd EDITION 2006 part II, Life of Phages, Page 66-104 BACTERIOPHAGE AS AN ANTIBIOTIC 5.1 WHAT PROPERTIES NEEDED AS AN ANTIBIOTIC? The antibiotic must be effective in the treatment of infection because of their selective toxicity. That means the drug should kill or effect against the invading desired organism without harming the cells of the host. In most of the cases, this toxicity is just relative rather than absolute, requiring that the concentration of the drug be carefully controlled to attack the microorganism while still being tolerated by the host. (1) 5.2 WHY PHAGES AS ANTIBIOTIC? As the PHAGE viruses can infect and kill the bacteria, they can be used as a drug targets against the Bacteria. Phage Therapy: Phage therapy is the use of lytic phages to kill specific bacteria as an alternative to antibiotic. The lytic mechanism of the Bacteriophages ensures the effective antibiotic mechanism of the Phages. The other useful thing is that the specific type of Bacteriophage attacks only the corresponding bacteria and so the other normal bacteria will not be affected by the specific Phage Therapy targeted to the aimed bacteria. So, the Phages have more specificity than all antibiotics in attacking the bacteria. 5.3 Host Vs Phages The phages are immunogenic and could initiate the immune responses. This effect may limit the uses of Phages because the Bacteriophages may be destroyed by our immune system even before attacking the desired target bacteria and also the strong immune responses may trigger the allergic reactions and also the human immune system produces antibodies against the Phages. Despite these matters, the good news is that their clinical uses reveal only very few side effects or allergic reaction. The best way to avoid the sensitization is to use the Phages only when it is necessary as in the case of multidrug resistant infection and using the Intra Venous IV Administration method. 5.4 BACTERIOPHAGE AGAINST TB Tuberculosis, one of the oldest diseases known to affect humans, is caused by bacteria belonging to the Mycobacterium tuberculosis complex. The disease usually affects the lungs, although in up to one-third of cases other organs are involved. If properly treated, tuberculosis caused by drug-susceptible strains is curable in virtually all cases. If untreated, the disease may be fatal within 5 years in more than half of cases. Transmission usually takes place through the airborne spread of droplet nuclei produces by patients with infectious pulmonary tuberculosis. MULTIDRUG RESISTANT TUBERCULOSIS: This condition arises when the Bacteria undergo point mutation in their genome which occurs at low but predictable rates. There are two types of drug resistant Primary drug resistant: This occurs when the strain infects the one who has never been treated before and Acquired drug resistant: In which, the resistant develops during treatment with inappropriate regimen. Apart from the resistant, some of the patients are not appropriate to give the usual dose of conventional treatment due to their co existing diseases like renal failure, hepatitis or liver failure. (1)(6) MYCOBACTERIOPHAGE Mycobacteriophages are the bacteriophages that infect against mycobacteria, the bacteria causing Tuberculosis and many other diseases like Leprosy. Mycobacteriophages were first discovered by the in 1946.They are the double stranded DNA viruses with non contractile tail belonging to the Siphoviridae family of the Bacteriophage. They also infect the pathogenic bacilli of the Mycobacterium Tuberculosis complex and now more than 250 mycobacteriophages have been indentified. They are either lytic or temperate. Some mycobacteriophages like DS6A can exclusively infect the Mycobacterium tuberculosis alone. Phages like 13, D 29, TM4, Bxz2 and Chel 2 infect both Mycobacterium tuberculosis and other Mycobacterium bacteria. Their morphological variation is limited but their genomes show extra ordinary genetic variability. The implications of phages in mycobacterial diseases may be greater than previously realized. (1) (2) (3)(7) 5.6 PHAGE THERAPY We can use lytic phages to kill specifically pathogenic bacteria as an alternative to antibiotics treatment especially for the multidrug resistant Tuberculosis. Lack of knowledge of bacteriophage biology and the quality monitoring during the preparation of therapeutic stocks had made the therapy difficult though the first known therapeutic use was in 1919.The M. Tuberculosis infections are hard to treat because the bacteria are naturally resistant to many antibiotic. The bacilli may remain in the latent or dormant state avoiding the action of drugs that require replication of the bacteria. So, the treatment of Tuberculosis requires multiple drugs for extended periods of time to effectively cure and avoid the drug resistant. The minimal duration for the treatment is four months with four drugs and then two months with two drugs. The most important thing is the emergence of multi drugs resistant strains and that makes the Phage Therapy more interested. (1) (2) (3) Dr Margaret Chan, the director-general of the World Health Organization said,The situation is already alarming, and poised to grow much worse very quickly. She and Bill Gates also stated that they only had little help from the modern drugs for the disease that is affecting 9 millions people each year killing nearly 2 millions of them. The conventional drugs are useless against some strains of tuberculosis and they addressed the situation OUT OF CONTROL and A POTENTIALLY EXPLOSIVE (5) TIM JOHNSON, Mc Clatchy Newspapers Animal study: One of the Mycobacteriophage, DS6A, showed reduction in the observed in the lesions in spleen, lungs and livers of guinea pigs infected with (Challenged with) Mycobacterium tuberculosis and the study showed that the anti bacterial effect of the phages is at least as good as Isoniazid monotherapy. The results are promising in the treatment of tuberculosis using phages. 5.7 MYCOBACTERIM INSIDE THE MACROPHAGES: Mycobacterium can reside in the macrophage cells of our immune system. They can even persist inside the phagolysosome where many bacteria and pathogens are killed. It was uncertain whether the mycobacteriophages can survive and replicate inside the hostile intra-cellular environment with reduced PH. (8)(9) 5.8 MYCOBACTERIUM SMEGMATIS, THE VEHICLE INTO THE MACROPHAGES: The above problem can be solved by using the vector bacterium Mycobacterium smegmatis. The technology was introduced in 2002. In this technology, the non-virulent bacteria Mycobacterium smegmatis act like a carrier into the macrophages. Macrophages infected with the Mycobacterium Tuberculosis or Mycobacterium avium were treated with the additional Mycobacterium smegmatis infected with Mycobacteriophage TM4. After they are ingested and destructed by the macrophages, the TM4 phages were released within the macrophages infecting and destroying the pathogenic bacteria even within the macrophages. The experiments showed the significant reduction of both the Mycobacterium tuberculosis and Mycobacterium avium. (9) 5.9 D29bacteriophages: This D29 are capable of entering the Macrophages without the need of any carrier and they can infect the mycobacterium and kill them effectively. So, the mechanisms of action of mycobacteriophages are completely different from the conventional drugs and will be so important in the multi-drug resistant cases. The Phage therapy also dose not need repeat dosing because the viruses do increase within the target bacteria and new virions are released on lysis. The endotoxin may be released into the body after the bacteria has been lysed and this could trigger the immune reactions but till now the clinical use of bacteriophages revealed only very few cases of side effects or allergic reaction indicating that our human body can really tolerate them. The other advantage is that they are cheaper and easier to produce than antibiotics. (10) REFERENCES LIPPINCOTTs ILLUSTRATED REVIEWS of MICROBIOLOGY 2007 EDITION HORACE T. ADAMS CONTEMPORARY TRENDS IN BACTERIOPHAGE RESEARCH 2009 EDITION RICHARD CALENDAR THE OXFORD TEXT BOOK OF THE BACTERIOPHAGE 2nd EDITION 2006 http://www.microphage.com/technology/phageBiology.cfm WHO, world health organization, Global Tuberculosis control Geneva Harrison text book of Practice of Medicine , USA 6th edition Fuller, KJ and Hatfull GF 1997 Mycobacteriophage L5 infection of Mycobacterium bovis BCG implications for phage genetic in the slow-growing mycobacteria Mol Microbiaol 26 755-766 Kaufmann SH 2002 Protection against Tuberculosis cytokines T cells and macrophages Ann Rheum Dis 61 Sulll 2 ii54-58 BroxmeyerL Sonsowaka DMiltner 2002 killing of Mycobacterium by a mycobacteriophage delivered by non virulent mycobacterium , model for phage therapy of intracellular bacterial pathogen, J infect Dis 1155-1160 Trollip A Albert H and Maskell 2001 Bacteriophage based technology for the rapid diagnosis and drug susceptibility testing of tuberculosis Am Clin Lab 20: 39-42 Phage as cancer curing agent 6.1 PHAGE DISPLAY is a process by which a peptide or a protein is expressed as an exterior fusion to a surface protein of a phage particle. The peptide or protein sequence can be deduced from its encoding DNA sequence that resides in the phage particle or in a transductant. Amplification of the DNA of interest can take place by phage/transductant propagation or by polymerase chain reaction PCR. By producing large amount of phage particles, each expressing a unique peptide or protein peptide and protein libraries can be obtained. The peptides or proteins interacting with defined molecular targets (most often proteins) can be isolated from such libraries by enrichments through repeated cycles of panning. So, the phage display can be regarded as a search engine of protein-target interaction. (1) Phages are bacterial viruses that have no native affinity to mammalian cells. But we can amazingly genetically reengineered to display peptides fusions to coat proteins that can recognize and bind to our mammalian cells. Oligonucleotide sequences encoding for foreign peptides are cloned into phage coat protein genes resulting in combinatorial libraries of billions of different phage clones displaying encoded peptides on their surfaces. This phage display libraries can be easily screened against various biological targets including the intact mammalian cells to give binding molecules with desired target-specific characteristics. Even the cell-specific peptides indentified through phage display can be used as delivery moieties for construction of gene therapy vectors, liposomes, or targeted drugs to diseased cells in many sorts of disorder including the cancer. (2)(3) 6.2 PHAGES AGAINST BRAIN TUMORS Malignant brain tumors are very difficult to treat because they are heterogenous, migrate far into adjacent essential brain normal tissues, are resistant to chemotherapy and radiotherapy and also protected by the blood brain barrier. (1) (4) The phage display might be so much effective against this fatal condition by following means. Phages can optimize the targeted delivery platforms to malignant brain cells using the cell specific peptides. The emerging of phage probes for profiling of brain tumors in individual patients and then making the personalized treatment based on the profiles of these tumors. To identify Death Penalty in Britain: Past and Present Death Penalty in Britain: Past and Present This paper analyses the past and future of the death penalty in Britain, examining the rationale for abolition in 1965 together with the potential and merits of re-introduction in the future. The death penalty was abolished in 1965 in Britain following a 1953 Royal Commission[1] and pressure by abolitionist groups. While the 1953 Report went outside its remit, to examine the effectiveness of hanging, it addressed the issues of deterrence and retribution; often heralded as the twin foundations of the death penalty and consequently used as the main arguments for the failure of the punishment. Bailey summarises deterrence theory by stating that â€Å"criminal sanctions must be severe enough to outweigh the pleasures†[2]. A fundamental concern is that deterrence can be broken down into various components. The apex of deterrence is a swift, public, just, and painful execution. A death penalty that combined all of these features could be said to have the maximum likelihood of deterring potential criminals. It is generally believed that the majority of death penalty mechanisms in existence lack at least three if not all four of these qualities. Whether the death penalty in fact deters is the subject of numerous studies; when read objectively they give no definite answer. Retribution is in many respects the antithesis of deterrence. Deterrence focuses on logic; retribution deals with the emotional reaction of society, with the oft quoted foundation being â€Å"an eye for an eye†[3]. In many respects this is concurrently the most and least powerful argument for the death penalty. It is difficult to argue, in particular in the most heinous cases, that society and specifically the victim’s relatives should not have the satisfaction of retribution. Concurrently it is an argument based on emotion; an element that justice strains to minimise. The fundamental difficulty was discussed by the US Supreme Court in Roper v Simmons[4] where Justice Kennedy made it clear that retribution can be justified only in certain cases; not in the case at hand. It is this fragmenting of the death penalty, with exceptions and splintered rationales developing, that has led to gradual reduction in the use of the death penalty. While a number of Royal Commission Reports and campaigns debated the issues mentioned above and below, it is likely that one particular argument dealt a hammer blow to the death penalty; the concept that innocent people may be executed. This realisation was a contributing factor to Justice Blackmun’s famous dissenting statement â€Å"I feel morally and intellectually obligated simply to concede that the death penalty experiment has failed†[5]. Year after year, new, modern evidence uncovers miscarriages of justice that lead to innocent men and women being released. In 1991 the ‘Birmingham Six’ were released following police errors and new evidence. Had they been convicted 30 years earlier, there would have been nothing more practical to do than grant posthumous pardons. Hood argued[6] that one of the main reasons for America still using the death penalty was that it was a populist measure. If this is so then there must be strong support for this argument of potential injustice, above the more specific, clinical reasoning, that persuades individual citizens of the dangers and risks that are inherent in the â€Å"machinery of death†. The modern addition to these time honoured theories is the popular focus on rehabilitation over punishment. The Criminal Justice System clarifies this by placing rehabilitation on an equal plane with punishment[7]. The rationale for this is uncomplicated and is based on the importance of working with the individual in order to help them contribute to society as a whole. The death penalty fairly obviously has no place within this new philosophy. The theoretical objections discussed above are merely the tip of an iceberg capable of sinking at least an ocean liner. Were there to be an inclination to re-introduce the death penalty, and in 1994 a bilateral coalition of 403 MPs favoured abolition, the European Convention on Human Rights would still have to be faced. Through the Human Rights Act, the United Kingdom is a signatory to the Act and is prohibited from imposing â€Å"degrading punishment†[8]. The issue has arisen predominantly with regard to cases of extradition to death penalty countries, and the courts have made it clear that even to extradite to such countries would constitute prohibited punishment. Further, to contemplate such a policy reversal would risk international condemnation. Amnesty have been vocal in condemning America and would turn their and others focus to Britain in an instant. While awareness of the factors above has been instrumental in 122 countries abandoning the death penalty either in its entirety or in practice[9], the evolution has also been the result of constant pressure from Human Rights groups including Amnesty International. Unlike America, Britain has traditionally been more dependent on the friendship of sister nations; a friendship that could conceivably shift dramatically. In short, the practical objections to a re-introduction of the death penalty would require a change in British foreign and domestic policy; the effects of which would be felt for decades. CONCLUSION This paper has addressed the death penalty in succinct terms; the question asks if it is the only way to â€Å"dramatically reduce crime†[10]. The analysis on deterrence and retribution show that far from this lofty status, there is no guarantee that it will reduce any crime. BIBLIOGRAPHY Bailey WC ‘Murder, Capital Punishment and Deterrence: A Review of the Literature’ (part of ‘The Death Penalty in America, Current Controversies’ Edited by Bedau H,  Published by Oxford University Press Hood R ‘Capital Punishment’ (1998) (part of ‘The Handbook of Crime and Punishment’ Edited by Tonry M,  Published by Oxford University Press Hood R ‘The Death Penalty: A World-wide Perspective’ 2nd Edition Turow S ‘Ultimate Punishment’,  Published by Picador GB Royal Commission on Capital Punishment: Report of the Royal Commission on Capital Punishment (1953) http://www.cjsonline.gov.uk/the_cjs/how_it_works/punishments_and_rehab/index.html http://web.amnesty.org/pages/deathpenalty-countries-eng European Convention on Human Rights Callins v Collins (1994)510 US 1141 Roper v Simmons (2004) 543 US 551 1 Footnotes [1] GB Royal Commission on Capital Punishment: Report of the Royal Commission on Capital Punishment (1953) [2] Bailey WC ‘Murder, Capital Punishment and Deterrence: A Review of the Literature’ [3] Exodus 21:23-25 [4] (2004) 543 US 551 [5] Callins v Collins (1994) 510 US 1141 [6] Hood R ‘Capital Punishment’ (1998) [7] http://www.cjsonline.gov.uk/the_cjs/how_it_works/punishments_and_rehab/index.html [8] Article 3 [9] http://web.amnesty.org/pages/deathpenalty-countries-eng [10] see question

Wealth and Greed - Do You Suffer from Affluenza? :: Argumentative Persuasive Essay Examples

Affluenza: A Human Created Disease With Profound Consequences Chances are that you haven't come across the disease known as affluenza, even if you have been an avid reader of newspapers and listener of news broadcasts. It is possibly the least discussed of the more debilitating diseases of our time. Strangeness characterizes this disease in many other ways too. Almost every one of us actively carries it. Its effects impact not only the immediate carrier but also society at large. Its symptoms are so commonplace that few people make a connection between the disease and the discomfort that it breeds. It infects rich and poor alike, and is beginning to imbed itself in younger and younger carriers. Oddly, those that do recognize the scourge that it sometimes brings are disparagingly referred to as hypocrites, elitists, party-poopers, or catastrophists. And most confusing, it is a disease that is socially acceptable among many of us. Wow, what a bizarre disease, huh? Yet, fortunately, known cures exist for this disorder but they require our dedicati on and perseverance to eradicate this pernicious malady. Defined by authors of a book with the same title, Affluenza is "a painful, contagious, socially transmitted condition of overload, debt, anxiety, and waste resulting from the dogged pursuit of more" (de Graaf et al.). In simple terms, affluenza is a disease that many of us suffer because we are too fixated on buying and consuming more and more. Do you think you or others you know might have it? But how would you know if you have it? What are the signs of this disease? According to some, affluenza is so encompassing in its effects on our psyches and our bodies that many symptoms of it do not appear different other more common disorders. Other symptoms are more easily distinguishable. Rather than spell out each symptom one by one, let's determine the extent to which you might have this disease through a series of questions. Answer the following questions with yes or no answers: 1. When you find yourself in a depressed mood, do you often get an impulse to buy something to soothe yourself?; 2. Do you often pay close to the minimum payment on your credit cards because of lack of available funds? 3. Do you work a job (either a 2nd job or an additional job to your spouse's) in order to afford the "luxuries" in life?; 4. Do you spend holidays with family members in facilities designated for consuming products-e.

Plato’s theory of Forms

Forms are defined as the objects or â€Å"things† we believe to see in which are not physically there, but in the form in which they are perceived. These Forms described in Plat's theory are only intellectually comprehended not physically. To Plato, nothing that is physical can be â€Å"Perfect,† perfect only exists in theory. But these Forms are not Ideas, simply because these forms existed before anyone was around to imagine these things.There were always â€Å"things† in shapes, or dutiful things, or quantities of things before there were people having ideas or giving names to these things. Plato was aware of the physical sense of things, but believed they had a lesser reality because they can always approximate their form and are always to some extent flawed. Aristotle on the other hand, disagreed with Plato on his theory of forms because he believed Plat's theory to be meaningless. Aristotle argument against Plato Is referred to as the Third man Argument.Ari stotle believed that if everything is unconnected by some type of outside form that relates everything together, there must be another form connecting that form with the first form and so on. He viewed the forms as Universals-Something that more than one Individual can be. Saying that something can be connected to more than one thing, so circularity, beauty, largeness and greenness are examples of universals because more than one thing can be circular, beautiful, large or green. So people, or animals or plants are not universals they are particulars because only one thing can be these things.I agree with Aristotle on his Idea of proving Plato wrong with universals and particulars. I think that these forms cannot Just end with one thing In common, that more than one adjective can be described per object. If something Is circular and that Is what Is In common, say the example are coins, they can also be silver, ridged, small, large, heavy, light, there are many ways of describing an o bject and their forms would be never ending. Plat's theory of Forms By landlubber's he believed Plat's theory to be meaningless.Aristotle argument against Plato is forms as Universals-something that more than one individual can be. Saying that I agree with Aristotle on his idea of proving Plato wrong with universals and particulars. I think that these forms cannot Just end with one thing in common, that more than one adjective can be described per object. If something is circular and that is what is in common, say the example are coins, they can also be silver, ridged, small, large, heavy, light, there are many ways of describing an object and their forms

All Quiet on the Western Front-Novel

â€Å"Men may have escaped the shells of battle but were often destroyed by war† How is this idea explored in the novel? â€Å"All Quiet on the Western Front† written by Erich Maria Remarque explores the idea that men have escaped the shells of battle but were often destroyed by war. Remarque presents the changes in Paul and his friends and by displaying the sense of isolation the men feel after the war by using a range of techniques. Remarque displays the changes in Paul and his friends by showing how the boys were once school boys who had an education and a future but war extinguished all innocence and hope for a future.The boys begin as an innocent class of twenty young men have the belief that war would be a glorious experience. â€Å"†¦Our heads were full of nebulous ideas which cast an idealized, almost romantic glow over life and even the war†¦Ã¢â‚¬  (p. 15)This enables the reader to comprehend how much of an impact the opinion of the older generation had. Remarque uses the technique of inclusive language â€Å"When we came out here we were cut off, whether we like it or not, from everything we had done up to that point. † (p. 4) to reveal the universal suffering of the men. When Paul returns home he realises that only those who experienced the war would truly understand the effect the war had on the individual. When Paul’s Mother talks to him about the war she tries to understand what Paul is suffering but Paul realises she truly has no idea. â€Å"She says ‘with the gas and all the rest of it’. She doesn’t know what she is saying†¦Ã¢â‚¬  (p. 116) This further destroys the men as they as no one truly understands what they’re feeling.Remarque continues to use metaphors during the text to demonstrate how the boys’ outlook on life has changed dramatically. â€Å"†¦The war has ruined us for everything†¦ We are no longer young men. We’ve lost any desire to conq uer the world. We are refugees. We are fleeing from ourselves. From our lives. † (p. 63) this quote emphasises how the war has killed everything inside of them that ever hoped for a future because the boys cannot literally flee from their lives. ‘We are refugees’ maintains the point that they will never be able to escape from the war and its effects.Lastly the metaphor â€Å"an abyss of suffering† finalises the amount of pain, grief and suffering the boys will face for the rest of their lives. On the surface it appears that the war has not impacted Paul and his way life but his struggles are imminent when he returns home on leave. Paul experiences a deep feeling of isolation when he returns home to find himself struggling to reconnect with civilisation. â€Å"The scenes existed once- but they will never return. They are gone, they are another world, a world that is in the past for us† (p. 7) This urges the reader to sympathise with Paul as he uses a sad, desperate tone of voice, wishing that he could become part of his old world again. â€Å"This sudden confrontation with the civilized world is too much for me. † (p. 174) This stresses the point that Paul has been away for so long, living in a completely different world of death, despair and fear that he is overwhelmed at the prospect of a clean bed and a proper toilet. When Paul returns home he develops an understanding of how a barrier has built itself between Paul and his old life.This quote further portrays the isolation Paul feels at home â€Å"’You are home, you are home. ’ But there is an awkwardness that will not leave me, I can’t get used to everything yet†¦ There is a veil and a few steps between me and them. † (p. 115) â€Å"Suddenly a terrible feeling of isolation wells up inside me. I can’t get back, I’m locked out; however much I might plead, however much I try†¦ and the past turns away from me. † ( p. 124) Remarque uses the tone of voice and words such as ‘I’ and ‘me’ to conclude that Paul is alone in his suffering and that at this point in time, he has no one to turn to.The metaphor ‘the past turns away from me’ allows the reader to fully comprehend how strong the barrier is that has formed and how isolated Paul feels when he describes how he feels as if his past is literally turning away from him and leaving him behind in the uncertainty and despair of war. Remarque effectively captured the idea of how although men escaped the shells of battle their lives were destroyed by the war. It reveals how the men evolved from being young and innocent with a family and future to knowing nothing but death and despair and having no hope for a future.

Vanishing Transistor essays

Vanishing Transistor essays The article The Amazing Vanishing Transistor Act found in the IEEE Spectrum discusses some of the new technologies that can be implemented for the transistor to increase its performance. Reducing its size can make the channel distance decrease causing the charge carries to have a shorter distance to travel. However, when reducing the size of the channel the gate has a harder time turning the channel off due to the lower threshold voltage that allows the carries to flow without a bias voltage. The first technique discussed to improve the transistor is to strain the silicon by replacing some silicon atoms with germanium atoms. This causes the distance between atoms to increase due to the germaniums larger size. The size change in the lattice changes the energy band structure along with reducing electron and hole collisions and decreasing their effective masses therefore increasing mobility. When the mobility increases, it allows for carriers to be more quickly accelerated by an electric field. This method isnt currently in production since if implemented on the current etch process (SOI), the smaller energy gap will cause more carriers to leak into the substrate. This would drive the power consumption up due to current being drawn but not used usefully. The best way to stop gate leakage is to increase the gate insulation with a material that has a higher dielectric constant. Currently, hafnium dioxide is being researched and appears to be the best candidate even though it appears to degrade carrier mobility. Hafnium dioxide gate insulation was combined with a strained silicon substrate and the two are compatible together. It appears this combination is able to have high mobility with low gate leakage. When the transistor continues to shrink its difficult to maintain a strong connection between the channel and gate with the current polysilicon gates. The highly doped polysilicon acts nearly ...