Nitrogen cycle Nitrogen gas is a colourless‚ odourless and non-toxic gas which makes up about 78 percent of the atmosphere. Nitrogen is extremely important to living material; in fact plants‚ animals and humans could not live without it. Sprent (1987) argued that nitrogen cycle is the most important process to living organisms after the carbon cycle. But nitrogen exists as dinitrogen (N2) in the atmosphere‚ which living things‚ particularly plants‚ cannot synthesize (citation) The process of nitrogen
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Presently‚ Consumers are rather conservative and conscious in accepting entirely new ingredients and products‚ and prefer to look for new benefits in more or less familiar products (Jongen and Meulenbery‚ 2005). However‚ the demands of consumers keep changing from time to time and these demands range from basic considerations such as improving food safety‚ shelf-life and reducing wastage to demands for increasingly sophisticated foods having special characteristics in terms of nutritional value
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Chapter 1 - Which one of the following is not a role for bioremediation? Curing infectious diseases - All of the following are examples of new emerging infectious diseases except Chickenpox - Normal microbiota: Beneficial microbial inhabitants of the body - Golden Age of Microbiology: Rapid discovery of basic microbiology principles - Re-emerging diseases: Once controlled by preventative public health measures they are now on the rise - Prions: Resistant to the usual sterilization procedures
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analysis suggests that these enzymes are also widespread in bacteria. The most well-known representative is CotA from Bacillus subtilis‚ an endospore coat protein with high thermostability (Hullo et al.‚ 2001). Other laccases have been found in Pseudomonas maltophila (Isono and Hoshino‚ 1989)‚ P.syringae (copA) (Cha and Chooksey‚ 1991)‚ Azospirillum lipoferum (Givaudan et al.‚ 1993)‚ Xanthomonas campesteris (Lee et al.‚ 1994)‚ Bacillus sp. (mnx G) (Van Waasbergen et al.‚ 1996)‚ B.sphaericus (Claus
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Aseptic Technique & Culturing Microbes Questions A. What is the difference between a bactericidal and bacteriostatic agent? What is the difference between sterilization and disinfection? Control of growth refers to the prevention of growth of microorganisms. This control is affected in two basic ways: by killing microorganisms or by inhibiting the growth of microorganisms
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(1992). Self-management of over-the-counter medications by older adults. Public Health Nursing ‚ 9 (1)‚ 29-36. Fleiszig‚ S. M.‚ Evans‚ D. J.‚ Do‚ N.‚ Vallas‚ V.‚ Shin‚ S.‚ & Mostov‚ K. (1997). Epithelial cell polarity affects susceptibility to pseudomonas aeruginosa invasion and cytotoxicity. Infection and Immunity ‚ 65 (7)‚ 2861-2867. Fraunfelder‚ F. T.‚ Bagby‚ G. C.‚ & Kelly‚ D. J. (1982). Fatal aplastic anemia following topical administration of ophthalmic chloramphenicol. American journal of ophthalmology
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Chapter 1 1. The scientist usually considered the first to see microorganisms‚ which he called "animalcules"‚ was A) Redi B) van Leeuwenhoek C) Pasteur D) Tyndall 2. The idea of Spontaneous Generation postulated that A) organisms could evolve into the next generation of organisms B) organisms could spontaneously combust C) organisms could spontaneously arise from other living organisms D) living organisms could spontaneously arise from non-living material 3. The work of Tyndall
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Objective: The target of this study was to evaluate the anthelmintic and antimicrobial activity of synthesissed quinoxaline-2‚3-Dione. Methods: The anthelmintic activity of selected newly synthesized 2‚ 3-dioxo-1‚ 2‚ 3‚ 4-tetrahydro quinoxaline-6-sulfonyl benzimidazole (s) were performed on adult earthworm (Pheretima Posthuma). The observation was made for the time taken to paralysis and/or death of individual worms up to four hours of the test period. Paralysis was said to occur when the worms
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Squalene is a linear triterpene formed via the MVA or MEP biosynthetic pathway and is widely distributed in bacteria‚ fungi‚ algae‚ plants‚ and animals. Metabolically‚ squalene is not only used as a precursor in the synthesis of complex secondary metabolites such as sterols‚ hormones‚ and vitamins‚ but also as a carbon source in aerobic and anaerobic fermentation in micro-organisms. Owing to the increasing roles of squalene as an antioxidant‚ anticancer‚ and anti-inflammatory agent‚ the demand for
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less peptidoglycan‚ has lipopolysaccharides‚ susceptible to EDTA Gram negative can be further differentiated into chlorophyllous (cyanobacteria) and achlorophyllous. Based on Gram staining Gram negative Escherichia coli Rhizobium Spirillum Pseudomonas Nostoc - cyanobacteria Oscillatoria - cyanobacteria Gram positive Staphylococcus aureus Streptococcus Bacillus Nostoc: akinete - a resting cell of cyanobacteria heterocyst - specialized nitrogen-fixing cells formed during nitrogen starvation
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