indicates whether a microbe uses the mixed acid fermentation pathway. If the pH falls to 4 or lower (acidic)‚ the indicator turns red‚ signaling a positive result. If the pH rises to 6 or above‚ the indicator turns yellow‚ signifying that the microorganism is negative for mixed acid production. U45 was negative for mixed acids
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Probiotics are live microorganisms which are believed to provide health benefits when consumed. The term probiotics meaning ‘for life’ (pro= ‘for’ or ‘in support’‚ biotic= ‘life’) is derived from Latin & Greek language. The term was first used by Lilly and Stillwell in 1965 to describe “substances secreted by one microorganism which stimulates the growth of another microorganism” i.e. which is exactly opposite of ‘antibiotics’‚ later in 1971 Sperti used the term probiotics to describe “tissue extracts
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to keep their taste & quality for long time certain care should be taken while using them. Moreover there are certain limits to how long food quality can be preserved (canned foods‚ n.d.). There are numerous microorganisms that can contaminate canned food products. One type of microorganism is the thermophilic bacteria. Their ability to produce spores resistant to heat and desiccation enables them to withstand the canning process and ‚ under favorable temperature conditions in storage‚ to cause
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surroundings which includes the abiotic component (the non living) and biotic component (the living) around us. The abiotic environment includes water‚ air and soil while the biotic environment consists of all living organisms – plants‚ animals and microorganisms. Environmental pollution broadly refers to the presence of undesirable substances in the environment which are harmful to man and other organisms. In the past decade or two‚ there has been a significant increase in the levels of environmental
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Biodegradation OF Xenobiotics . OVERVIEW Microorganisms play an important role in the removal of synthetic organic compounds from the environment. This chapter gives an overview of the evolution of biodegradation pathways and describes the strategies that microorganisms have evolved to transform important molecular structures. The actual effectiveness of biodegradation in the environment is determined by the bioavailability of the
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infection Asepsis- An environment that is free of harmful microorganisms. An aseptic technique ensures that only uncontaminated equipment and fluids come into contact with susceptible body sites. It should be used during any clinical procedure that bypasses the body’s natural defences. Using the principles of asepsis minimises the spread of organisms from one person to another. Aseptic techniques are used to reduce contamination from microorganisms. It involves strict guidelines that help to prevent infection
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Project 1: Antimicrobial Activity of Soil Isolates John Franklin Farrar Department of Biology and Microbiology and Biology Address BOX 22750 BOWEN HALL‚ RALEIGH‚ NC‚ 27607 Abstract: Isolation and characterization of microorganisms is a practice that aids in Increasing ones knowledge of a laboratory setting and it helps improve on Using sterile technique. Isolates of soil microbes can be categorized and Characterized based on a number of criteria ranging from gram-staining
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Effects of Antiseptics and Disinfectants Purpose: The purpose of this lab is to discover substances that can slow the growth of‚ or kill‚ microorganisms. Hypothesis: The antiseptic that will prevent the growth of bacteria the most is iodine. The disinfectant that will prevent the growth of bacteria the most is bleach. Procedure: To begin the lab‚ turn the agar plate over and divide the plate into four quadrants and label the agar plate whether you
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drug resistance. Because of drug resistance there are new ways of treating catheter associated urinary tract infections. Cranberry juice and cranberry extract consumed by women may interfere with microorganism attachment. Silver alloy catheters have also been shown to effect the adherence of microorganism. Silver also minimizes the formation of biofilm and migration to the bladder. Bacterial lysate is another UTI prevention method‚ which is a vaccine that introduces a small amount of E. coli into
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lab A. Define the term selectively toxic. Why is it an important feature of antimicrobial agents? Selective toxicity is the ability of a chemical or drug to kill a microorganism without harming its host. Selective toxicity is important to microbial agents because it enables these agents to inhibit or kill a microorganism by interacting with microbial functions or structures different from those of the host thereby showing little or no effect to the host. B. What are broad and narrow spectrum
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