- ECTOTHERMS are organisms that have a limited ability to control their body temperature. Their cellular activities generate little heat. Their body temperatures rise and fall with ambient temperature changes. Most organisms are ectotherms. Examples are plants‚ all invertebrates‚ fish‚ amphibians and reptiles - ENDOTHERMS are organisms whose metabolism generates enough heat to maintain an internal temperature independent of the ambient temperature. Examples are birds and mammals - EXTENSION (Not
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identify unknown bacteria provided. The identification of unknown bacteria is beneficial in many aspects of the research of microorganisms and also aids physicians to treat patients correctly. Various tests were performed to provide the fermentation abilities‚ presence of particular enzymes‚ and biochemical reactions. Qualitative observations were made on the tests in identification process. The data from experimentation provided sufficient results to suggest that the identity of unknown bacterium
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experiment. Information about these microorganisms include; (Jamie Symonds‚ Medium Rare) • These are small organisms that are classified as prokaryotic microorganisms. • Bacteria are unicellular
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more than 100 phytochemicals. It is used as sugar substitute. The extracts from leaves are used for the microbial assay and study the antimicrobial activity. The microbes used for the testing the activities are E.coli‚ Staphylococcus aureus‚ Bacillus subtilis‚ Salmonella typhi‚ Aspergillusniger‚ Candida parapsilosis‚ Trichophyton rubrum. With different concentrations of the extracts starting from 2.5µg/ml‚ 5.0µg/ml‚ 7.5µg/ml‚ 1.0µg/ml and the highest activity is shown by Staphylococcus aureus and
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characteristics of organisms in broth cultures can also be helpful. The major problems that may arise are contamination and species variations. These must be eliminated if good results are to be obtained. Materials 1. Nutrient agar plates of a) Sarcina lutea and Serratia marcescens b) Bacillus subtilis and Escherichia coli c) Streptococcus fecalis and Pseudomonas fluoroscens 2. 24 hour pour plate preparation of a) Serratia marcescens b) Sarcina lutea c) Bacillus subtilis d) Escherichia
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experiment carbohydrate catabolism was first tested under aerobic conditions. We began this by drawing three sections on the bottom of the petri plate‚ dividing it into three sections. Using a sterile loop‚ we streaked a single line of each culture Bacillus subtilis‚ Pseudomonal aeruginosa‚ and Escherichia coli‚ to each of the separate sections. The plate was incubated until the next lab period‚ where we then flooded the plate with Iodine and were able to observe and record starch Hydrolysis. (Table 1)
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margin and size. Pure cultures of microorganisms are those that are uniform and are of the same descendants of the same organism. The isolation of colonies by streak plate technique allows the obtainment of pure cultures which can be studied further. Good quality aseptic technique and proper sterilisation are a required to ensure that all samples produced are free from unwanted organisms that can lead to contamination of microbial cultures. Environmental factors such as temperature‚ osmotic pressure
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Microbiology Laboratory Report Identification of Unknown Bacteria 6O BIO 251-7H1 Gram Stain Summary: Out of 28 Unknown microorganisms‚ slant 6O was randomly selected‚ and subjected to testing in order to identify it’s species. Seventeen of the unknown bacteria were classified as Gram-negative bacilli: Corynebacterium pseudodiphtheriticum‚ Enterobacter aerogenes‚ Eschirichia coli‚ Flavobacter capsulatum‚ Helicobacter pylori‚ Klebsiella pneumonia‚ Klebsiella oxytoca‚ Proteus hauseri‚ Proteus
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CHAPTER I INTRODUCTION 1.1 Background Food is one of human sources of calorie‚ protein‚ fats‚ and nutrition. Yet‚ because of the highly nutritious content‚ food is susceptible to growth of microorganisms. By the presence of microorganisms in food‚ the food is more likely to have shorter shelf life. Thus‚ mostly it is resolved by the addition of antimicrobial substances to food‚ such as condiments and preservatives. Condiments and preservatives could inhibit the growth of microorganisms
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on the body of marine animals or internal organs of both aquatic and terrestrial animals. Amoeba reproduces asexually by binary and multiple fissions. They eat algae‚ bacteria‚ other protozoan‚ and tiny particles of dead plant or animal matter. Bacillus: They are rod shaped‚ gram positive bacteria found in soil and water. The largest are 2m across and 7m long. Most are aerobic but some under certain conditions can be facultative anaerobes. Each bacterium creates only one spore‚ which is resistant
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