Chapter 1 Terminalia Catappa’s Antimicrobial Property Introduction With the emergence of new drug-resistant bacteria, it has been an on going problem on how to fight these pathogens. The common treatment is by using antibiotics but because of its resistance to the existing drugs, there is a constant need to develop new drugs which is very expensive. One way to help solve this is to use a plant based drugs, not only it’s cheaper but also has fewer side effects. There have been a lot of studies
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staphylococcaceae , which are composed of 32 species and 8 sub species in the genus staphylococcus, The staphylococci and non-motile, non-spore forming facultative anaerobes that grow by aerobic respiration or by fermentation, staphylococci are gram positive bacteria with diameters 0.5 and 1.5 μm and characterized by individual cocci, which divide in more than one plane to form the grape-like clusters. The cell wall of S aureus has a tough protective coat which is relatively amorphous in appearance, about 20
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Scientific Discovery Paper Penicillin is an antibiotic that destroys bacteria by destroying the cell wall of the microorganism. It does this by inactivating an enzyme necessary for the cross linking of bacterial cell walls. The enzyme is known as the Tran peptidase. It accepts the penicillin as a substrate, it the alkanolates a nucleophilic oxygen of the enzyme, rendering it inactive. Cell wall construction stops and the bacteria soon die. The antibiotic nature of the penicillin so due to the strain
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anaerobic bacteria. 1. Degradative mechanism Anaerobic bioremediation is a remediation technique which injects organics, which become electron donors, together with nutrient salts such as nitrogen and phosphorus into groundwater and degrades contaminants by anaerobic bacteria. It is known that PCE and TCE are dechlorinated reductively by anaerobic bacteria and degraded into dichloroethylene (DCE), vinyl chloride (VC), ethylene and likewise, ethane (Fig. 1). Various types of anaerobic bacteria can
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Associate Level Material Name Sci/162 Week 7 Foodborne Illness Date [pic]Hepatitis A ? What is the infectious agent (pathogen) that causes this infectious disease? For example, the name of the bacteria, virus, or parasite.[pic] There are several types of Hepatitis. Infectious hepatitis, which is commonly referred to as Hepatitis A, infects the liver via the virus of the same name. This is commonly spread through contamination from feces. The virus is transmitted among people through direct contact
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Simple organisms-unicellular Complex organisms-multicellular The cell was discovered by Reginald Hooke in between 1635-1703 • He used a slice cork under the microscope to discover and saw empty spaces, which he called cells Cells are the basic unit of life. • For any structure to be called a cell it will have to have 3 or 4 basic features o (animal) round, plasma membrane (outside), nucleus (middle of the cell), cytoplasm (in btwn the nucleus and the plasma membrane) have 3 components
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African Journal of Biotechnology Vol. 8 (14), pp. 3369-3376, 20 July, 2009 Available online at http://www.academicjournals.org/AJB ISSN 1684–5315 © 2009 Academic Journals Full Length Research Paper Effect of Bacillus subtilis on the growth and survival rate of shrimp (Litopenaeus vannamei) Hadi Zokaei Far1, Che Roos B. Saad1*, Hassan Mohd Daud2, Sharr Azni Harmin1 and Shahram Shakibazadeh1 1 Department of Aquaculture, Faculty of Agriculture, University Putra Malaysia, 43400 Serdang
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INTRODUCTION There are many reasons for knowing the identity of microorganisms. The reasons range from the knowing the causative agent of a disease in a patient, so as to know how it can be treated, to knowing the correct microorganism to be used for making certain foods or antibiotics. This study was done by applying all the methods that have been learned so far in the microbiology laboratory class for the identification of an unknown bacterium. MEDIA LIST Unknown Bacterium #5 Mannitol Salt
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questionbase.50megs.com AS-Level Revision Notes AS Biology – Revision Notes Unit 1 – Core Principles Biochemistry 1. Carbohydrates have the general formula (CH2O)x. 2. The simplest carbohydrates are monosaccharides, e.g. glucose (C 6H12O6), and are monomers. 3. Monosaccharides can join together to form disaccharides in a condensation reaction, forming a glycosidic bond. This can be broken by hydrolysis: 4. Polysaccharides are formed from multiple glycosidic bonds, and include starch
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produce new cells. The bacteria excel between the temperatures 40*-140*F also known as the “danger zone.” This supports the idea that the bacteria cannot grow at refrigerator or freezer temperatures. History: this is one of the most common causes of food poisoning in the word. Some researchers say the bacteria causes nearly one million sicknesses each year. This infection often occurs when foods are kept in large quantities and left out for a while before serving. This bacteria therefore effects
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