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  • Types Of Gene Therapy - Advantages And Disadvantages of Gene Therapy    By: Shalini Balan

    This article discusses about gene therapy and its different types with its benefits and disadvantages. Gene therapy technique was introduced for correcting defective genes responsible for disease development. Gene therapy is the insertion, alteration, or removal of genes within an individual's cells and biological tissues to treat disease. >> Category: Biotech Research
  • Principles of PCR - Polymerase Chain Reaction    By: amar nagesh

    Each and every laboratory will have different protocols for PCR operartion. In this article utility, principles and designing of primers in PCR is described >> Category: Biotech Research
  • Potential Economic Benefits From Microbial Enzyme - Proteases    By: soumya T.V

    Proteases are the highest value commercial enzyme. microbial proteases constitute the major share of the enzyme industry because of their number of practical applications in dairy, food, pharmaceutical, leather and detergent industries and collectively account for about 60% of the total worldwide enzyme sales. ability >> Category: Biotech Research
  • Biotechnological Possibilities For the Use and Application of Coir Fibre    By: soumya T.V

    The coconut husk fibres are predominantly composed of lignocellulosic material.Coir fibre is in great demand on account of its durability,water absorption,low cost & other properties. The coir industry can be made a biotechnology based one where the possibilities of this abundantly available raw material can be exploited to the greatest extent. >> Category: Biotech Research
  • A Detailed Review on Feeder-free Culture of Human Embryonic Stem Cells    By: Preethi Venkateswaran

    Human Embryonic Stem cells (hESC) are derived from blastocysts. They are grown in strict culture conditions and offer a promising future in applications such as cell therapy, drug development and drug discovery. It is known that hESC cells can be derived from mouse embryonic fibroblasts (mEF) or humans. >> Category: Biotech Research
  • Financial and Marketing Aspects of Qnexa    By: Preethi Venkateswaran

    Incidence and Prevalence of Obesity It is a well known fact that obesity is currently a growing concern which affects more than one-third of the American population. It is mainly caused due to the increase in body weight as a result of excessive accumulation of fat in the body. Obesity is linked to many life threatening diseases such as diabetes, hypertension and cardiovascular diseases. Obesity is defined as body mass index (BMI) of 30 or greater. BMI is calculated from a person's weight and height. >> Category: Biotech Research
  • Assessment of QNEXAA in the US Market    By: Preethi Venkateswaran

    The objective of this assessment was to evaluate QNEXA®, a drug for anti-obesity developed by Vivus Inc. During this work, the market opportunity for the drug, marketing strategy, financial aspects and the risks associated with it were reviewed. >> Category: Biotech Research
  • Vaccine For Rotavirus    By: Preethi Venkateswaran

    The development of a vaccine is the ultimate treatment against this virus. This vaccine must duplicate the role played by the natural immunity. Vaccine program must include the prevention of moderate to severe disease. Over the last 2-3 decades many vaccines have been developed of which the 'jennerian' vaccines were the first to be introduced. >> Category: Biotech Research
  • All About Rotavirus and It's Virology    By: Preethi Venkateswaran

    The name rotavirus comes from the Latin word 'rota' (means wheel), and it indeed looks like a wheel. Rotavirus, a non-enveloped virus with an 11-segment double stranded RNA genome, was first found in humans using electron microscopy in biopsies from children with acute gastroenteritis, before being first spotted in animals in 1960's. >> Category: Biotech Research
  • Degradation of Phenanthrene and Anthracene by Pseudomonas Strain    By: Hardik pathak

    A bacterial strain was isolated from a Mumbai coastal area. It was dosed with anthracene and phenanthrene, and, after 14 days of incubation, it had degraded 90% and 93% of the anthracene and phenanthrene, respectively. Anthracene showed four Metabolites and phenanthrene showed two metabolited.The metabolites were extracted and identified by UV-Visible light absorption, HPLc and GC MS. >> Category: Biotech Research
  • Physico-Chemical Properties of Petroleum Polluted Soil Collected From Transport    By: Hardik pathak

    In the last few years, large numbers of ecosystems have changed by the significant influence of human activity. Most of the petroleum goes in the ecosystem via leakage of coastal oil refineries. This fact evoked the interest of scientists to investigate the oil distribution system and its fate in the environment, especially the soil environment. Bioremediation of these contaminants is a prerequisi >> Category: Biotech Research
  • Challenges and Solutions in Pediatric Clinical Trials - Part III    By: Preethi Venkateswaran

    Perspectives of clinicians can also pose as a barrier for the recruitment of pediatric subjects. Clinicians are asked to recruit children for research studies. This involves time and effort as there is consent to be taken from parents and describe the studies to both the children and parents. This time could be used to treat patients instead. >> Category: Biotech Research
  • Need for Pediatric Formulations in Clinical Trials - Part II    By: Preethi Venkateswaran

    For most of the drugs, efficacy studies are not carried out for children differently but just cut and copy pasted from adult data. Disodium pamidronate is licensed for use in Paget's disease and osteolytic lesions and bone pain in multiple myeloma and breast cancer in adults, but it has also been used in a variety of pediatric conditions. >> Category: Biotech Research
  • Introduction to Pediatric Participation in Clinical Trials - Part I    By: Preethi Venkateswaran

    Medicine and healthcare, for all these years, have been evidence-based in the case of adults, and will continue to be so. However, the quality and efficacy of research in pediatrics are mostly based on anecdotal data and extrapolation of data from adult research. Over 50% of the medications used for children are used as 'off-label' and there have been no records of testing them in children. >> Category: Biotech Research
  • Proteasomes and Their Biological Significance    By: Sandhya Anand

    The article briefly summarizes the importance of proteasomes in drug designing, biological significance and exploratory studies on evolution. >> Category: Biotech Research
  • Adaptive Immune Responses to Fungal Infections    By: Preethi Venkateswaran

    The adaptive immune responses to fungal infection involve the cell mediated and humoral responses. The cell mediated responses include effector cells and the humoral effector molecules include antibodies which play a role in combating fungal infections. >> Category: Biotech Research
  • IPEX - A Detailed Review    By: Preethi Venkateswaran

    IPEX is immunodysregulation, polyendocrinopathy, enteropathy, X linked syndrome. It is a rare inborn error of the immune regulation characterised by early onset of one or more autoimmune diseases in boys. IPEX occurs due to mutations in Foxp3. >> Category: Biotech Research
  • Mechanism and Suppression by T Regulatory Cells    By: Preethi Venkateswaran

    T regulatory cells are very essential for the modulation of immune responses. There are four basic modes of action namely: 1. Suppression by inhibitory cytokines: Inhibitory cytokines like interleukin 10 and TGF- β have been mediators of Treg cell induced suppression. It was always thought that Tregs function in a contact dependent manner hence the involvement of IL10 and TGF β was thought twice about. Tregs control disease in a manner that is dependent on IL10 and TGF β. An allergen challenge occurs after which CD4+ effector T cells are stimulated and these produce large amounts of IL-10 in lung by allergen specific Tregs and these control diseases. >> Category: Biotech Research
  • Applications of Immobilized Enzymes    By: Aritri Ghosh

    Immobilized enzymes are applied for various production process of biological substances in commercial way. A brief nature of the use of immobilized enzyme is discussed here >> Category: Biotech Research
  • Techniques Used for Immobilization of Enzymes    By: Aritri Ghosh

    The commonly employed techniques for immobilization of enzymes are adsorptions, entrapment, covalent binding and crosslinking. Enzyme immobiliztion has many advantages and it is done my many processes which are desciribed here, >> Category: Biotech Research
  • Commercial Production of Enzymes    By: Aritri Ghosh

    Enzymes are needed in many biological research work and for medicinal purposes in a great quantity. Commercial processes are thus used for bulk production of several enzymes. >> Category: Biotech Research
  • T Regulatory Cells a Thorough Understanding    By: Preethi Venkateswaran

    It has been a misunderstanding that allergies and autoimmune diseases are caused due to imbalance in Th1/Th2 activity but this is due to the T regulatory cells (Tregs). The T regulatory cells were first named as suppressor cells as they suppress activation of the immune responses hence maintaining homeostasis and tolerance to self antigens. >> Category: Biotech Research
  • Cell Viability and Cytotoxicity Assays - Part 2    By: Aritri Ghosh

    These are the assays to determine cell viability and cell cytotoxicity. The tests to determine the cell viability and cell cytotoxicity have a short term result as they identify the dead or live cells at the time of the assays. Many times when the cells are subjected to toxicity such as exposure to drugs, irradiation etc the effects are not immediate. The effects are observed after several hours or sometime after some days. The assays based on the survival of cells like retention of regenerative capacity or reproductive capacity is preferred. >> Category: Biotech Research
  • Cell Viability and Cytotoxicity Assays - Part 1    By: Aritri Ghosh

    Cell viability and cell cytotoxicity are determined by several assays.Some of them are listed here. >> Category: Biotech Research
  • Assay Development For Drug Discovery    By: Preethi Venkateswaran

    In order to understand the pathophysiology of the disease, understanding the development of drug assays/screens that target essential and specific cellular and molecular processes that cause the disease. This in turn enhances the probability of discovering target- specific drug candidates that will be less toxic. >> Category: Biotech Research
  • Drug Development and Some Important Concepts with Examples    By: Preethi Venkateswaran

    Drugs are chemical compounds which prevent diseases and infections. Anciently plants/plant parts were used to ameliorate certain disease symptoms. Chinese/Indians/German herbal medicines have been used for years. The methodology to use plants for treatment is to isolate the pharmacologically active drug from the plant and hence treat. >> Category: Biotech Research
  • All About Elisa And Immunoelectrophoresis    By: Preethi Venkateswaran

    ELISA was developed in 1971 by two groups independently, namely Engvall and Perlmann, and Werman and Schuurs. Later Vollar and Clark and Adams utilized ELISA for detection of virus infection. >> Category: Biotech Research
  • Cytokines and Immune Responses to Trichuris Muris    By: Preethi Venkateswaran

    Trichuris muris infection is characterized by crypt hyperplasia, eosinophilia, goblet cell hyperplasia and mucosal mastocytosis. The T helper cells produced type 1 cytokines IFN-γ, lymphotoxin and IL-2; stimulated IgG2a production and cell mediated effector responses. The type 2 cytokines IL-4, IL-5, IL-6, IL-9 and IL-13 were secreted by Th2 cells in absence of type 1 cytokines and promoted production of IgE and IgG1. Resistance to intestinal nematodes was associated with the development of a Th2 response. >> Category: Biotech Research
  • Basic Principles of Genetic Engineering    By: Kanya Sasi

    Genetic engineering involves manipulation of the genetic material towards a desired end in a direct and pre-determined way. This is alternatively called recombinant DNA technology or gene cloning.In short Gene cloning is essentially the insertion of a specific piece of 'desired DNA' into a host cell in such a way the inserted DNA is replicated and handed onto daughter cells during cell division. >> Category: Biotech Research
  • Lyphocyte Populations and their Contribution During Trichuris Muris Infection    By: Preethi Venkateswaran

    The role of T cells in mediating resistance and susceptibility to the parasitic gastrointestinal nematode T. muris has been well defined. This is due to the existence of strains of mice which are resistant and susceptible to the parasite and early observations of polarized T helper responses in these strains. The importance of the thymus as a source of T cell was confirmed by careful observation >> Category: Biotech Research
  • Trichuris Muris Infection - Immune Response and Lifecycle    By: Preethi Venkateswaran

    Gastrointestinal helminth infections are widespread across the globe and throughout the animal kingdom where they are responsible for the loss of productivity in cattle and other livestock. They cause infections in humans too which has a considerable impact as they infect over 1 billion people worldwide. >> Category: Biotech Research
  • Similarities and Differences Between TCR and MHC    By: Preethi Venkateswaran

    Somatic hypermutation increases the BCR by bringing about point mutations in the V regions of both chains. The somatic mutations is brought about by an enzyme AID which is activation induced cytidine deaminase and this is expressed in B cells but do not occur in TCR genes. AID is active only in activated B cells and these increase DNA damage thereby leading to a mutation. >> Category: Biotech Research
  • Mechanisms in Major Histocompatibility Complex (MHC)    By: Preethi Venkateswaran

    There are many mechanisms which lead to polymorphisms. The mechanisms differ from MHC to antibody/TCR genes. >> Category: Biotech Research
  • Polymorphisms in Major Histocompatability Complex    By: Preethi Venkateswaran

    There are many genetic mechanisms which generate new alleles. New alleles arise by point mutations or by gene conversion. Here in gene conversion one gene is replaced in part by sequences from a different gene. Mutations can be replacement and silent substitution. >> Category: Biotech Research
  • Principles and Techniques Behind Bacterial Transformation    By: Lakshmi K Sugavanam

    The techniques employed in the insertion of plasmids into bacterial cells. Transformation was demonstrated by Frederick Griffith in 1928 when he discovered that a non-virulent strain of Streptococcus pneumoniae converted to a virulent form after exposure to heat-killed virulent strains. >> Category: Biotech Research
  • Restriction Digestion of DNA    By: Lakshmi K Sugavanam

    Importance of restriction digestion as a tool in DNA analysis. It is sometimes called as DNA fragmentation. >> Category: Biotech Research
  • Application of RAPD in Molecular Biology    By: Lakshmi K Sugavanam

    Why Random Amplification of Polymorphic DNA (RAPD) is an important Molecular Biology technique. It is a PCR reaction in which the amplified target DNA is unknown. A large genetic material (DNA) of unknown origin or composition can be effectively profiled using this technique. >> Category: Biotech Research
  • All About Major Histocompatibility Complex and Antibodies    By: Preethi Venkateswaran

    Major histocompatibility complex (MHC) occupies 3.6Mb on chromosome 6. Genes present in the MHC bind peptides of either intracellular or extracellular origin and present them to T cells. When these peptides are recognised as foreign the T cells initiate an immune response. So far there are 128 functional genes in MHC which are known. MHC is a multigene family which control self/nonself recognition >> Category: Biotech Research
  • Polymerase Chain Reaction - Applications of PCR    By: Lakshmi K Sugavanam

    A Molecular Biology tool that is used for amplification of minute quantities of DNA. It is used for amplification of DNA for cloning purposes and for creating hybridization probes. It can be used to identify DNA fingerprints and perform paternity testing. >> Category: Biotech Research
  • Metagenomics- The Key to Unculturable Microorganisms    By: Lakshmi K Sugavanam

    How metagenomics may offer access to unknown genes and metabolic pathways. Metagenomics is the genomic analysis of microbial communities directly from environmental samples. >> Category: Biotech Research
  • Immunoglobulin Genes and the B Cell Development    By: Preethi Venkateswaran

    The immune system recognizes foreign molecules (antigens) through special receptors which enables them to elicit an immune response against them. The adaptive immune system has B-lymphocytes as one of the main players which produce antibodies as their antigen recognizing molecules. Each antibody/immunoglobulin molecule has a unique recognition site which is specific for a particular epitope. >> Category: Biotech Research
  • Antibodies- Conserved and Variable Regions    By: Preethi Venkateswaran

    Antibodies are the secreted form of the B-cell receptor. An antibody is identical to the B-cell receptor of the cell that secretes it except for a small portion of the C-terminus of the heavy-chain constant region. In the case of the B-cell receptor the C-terminus is a hydrophobic membrane-anchoring sequence, and in the case of antibody it is a hydrophilic sequence that allows secretion. >> Category: Biotech Research
  • Siderophores the Iron Chelators    By: PIYUSH JOSHI

    Siderophores a low molecular weight protein molecules, which chelate the free iron present in the soil and thus making the iron unavailable to the deleterious microorganism and in turn help in Plant growth promotion. >> Category: Biotech Research
  • Immune System Components Involved in Defence Against Viruses    By: Preethi Venkateswaran

    T lymphocytes and Natural Killer (NK) cells are chiefly involved in defence against viruses. Besides these cells, B lymphocytes also play a role in defence, when the T lymphocytes attack the virus the B lymphocytes simultaneously produce antibodies. So that on exposure to the same virus for a second time, the antibody prevents infection. >> Category: Biotech Research
  • Immune System Components For Defence Against Intracellular Bacteria    By: Preethi Venkateswaran

    Mycobacterium tuberculosis is an intracellular pathogen; it grows inside the vesicles of (mostly) macrophages and dendritic cells (DCs). These bacteria are protected from the effects of antibodies and cytotoxic T cells. They cannot be destroyed as they escape acidification in the vesicles due to presence of mycolic acid in their cell walls. Thus, in order to destroy these T and NK cells are involved. >> Category: Biotech Research
  • Immune System Components For Defence Against Extracellular Pathogens    By: Preethi Venkateswaran

    The antibodies, phagocytes (neutrophils, monocytes, macrophages and dendritic cells) and complement are the major components of the immune system which provide defence against extracellular bacteria. Toll like receptors (TLRs) are also involved, they are present on the surface of the phagocytic cells and recognize specific patterns on the pathogens and are thus, able to phagocytosize them. >> Category: Biotech Research
  • Theories of Sex predominance | Women and Men Differences    By: Preethi Venkateswaran

    The body's innate aversion to self destruction is called as autoimmunity. This was first noted by Ehrlich and Morgenroth. It was found that the injection of self antigens failed to elicit an immune response in the autologous host. The goats which were immunized failed to recognise and produce their own antibodies. Thus was coined the concept horror autotoxicus. >> Category: Biotech Research
  • Autoimmunity - Overview and Classification of Autoimmune Diseases    By: Preethi Venkateswaran

    Immune system is like any other system which leads to failure of some or all the parts. This failure can lead to disastrous consequences. When the immune system fails to recognize its own cells and begins to destroy them the result is autoimmunity. It was Paul Ehrlich who coined autoimmunity and termed this condition as 'horror autotoxicus.' >> Category: Biotech Research
  • Xenotransplantaion - A Boon Or Bane (Part 1)    By: Preethi Venkateswaran

    The use of human organs for transplantation was the initial trend, but due to the shortage of human organs xenotransplantation came into picture. From an immunological perspective nonhuman animals would be better donors for transplantation of organs however, most of these species are either endangered or are too small to provide organs for the transplantation. Use of pigs avoided these problems. >> Category: Biotech Research
  • Transplantation: A Medical Breakthrough    By: Preethi Venkateswaran

    Transplantation has been a medical miracle. The use of organs from human organ donors, and their transplantation into patients having an organ failure has lead to successful allo-transplantations. The use of human organs for transplantation however, have led to acute shortage of human organs and have led to the death of many. In order to solve this problem organs from animals were considered. >> Category: Biotech Research

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