has 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
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Biology 3210 Laboratory Lab Report 1 Detection of genetically modified maize in from commonly available corn food product Introduction A genetically modified organism (GMO) is an organism which has had its genome modified by the addition of genetic material from another species (Steynen‚ 2012). There are many debates surrounding genetically modified organisms on both personal levels‚ global levels and anywhere in between. There are issues on whether food produced with GMOs is safe‚ if it
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UNKNOWN LAB REPORT UNKNOWN NUMBER 54 Ron Williams 7-28-05 Bio 205 Prof. Curlee Fall 2005 Purpose 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 of the methods that have been learned so far in the microbiology laboratory
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a sample of contaminated dirt by running it through a series of identification techniques. Some of these techniques were simple staining‚ gram staining‚ and isolation techniques. The hypothesis of this experiment was that the bacterium is of the bacillus family due to the rod shape. Due to multiple complications with the PCR‚ a new hypothesis couldn’t be formulated. Methods: In this experiment‚ a 1 gram sample of contaminated dirt was taken and mixed with 100 mL of sterile water then shaken. After
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Genetic Engineering‚ Solving World Problems XXXXXXXXXXXXXXXXXXXX Research Paper for ENGL 135 Professor Krivokuca DeVry University April 24‚ 2013 Genetic Engineering‚ Solving World Problems Can you imagine a four year old girl; her name is Elli‚ being awakened from the sounds and pains of her grumbling stomach? Her cries are answered as her mother comes in‚ picks her up and tries to sooth and comfort her. However‚ what this four year old girl needs‚ her mother cannot provide—food. It has
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Canada Spees Lab 2 Prokaryotes Purpose: Performing this lab will help me better understand the characteristics of prokaryotes and compare them with eukaryotes. This lab will also help me visualize and better understand the physical description‚ and the different types of bacteria and how they stain‚ whether it be gram positive or gram negative. Hypothesis: If I read the textbook and use the resource websites‚ then I will be able to better understand prokaryotes and describe the structural characteristics
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conclusion‚ different staining techniques are used to determine the presence of certain exterior structures of the bacteria like the cell envelope or just to identify the basic shape and size of the microbe. In this experiment‚ the microbes E. coli‚ Bacillus sp and an unknown microbe from petri dish 1 were categorised as gram negative or gram positive and their shape was identified. These staining techniques are the correct way to identify the shape and size of microbes.
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Amanda Lab Report 1 Microbiology Laboratory Title – Differentiating Organisms using the Gram Stain Introduction The experiment conducted was based upon the known attributes of two different groups of bacteria‚ those that are gram positive‚ and those that are gram negative. Using a specific staining procedure‚ it is possible to differentiate the two types under a microscope The gram stain method of differentiation is possible because of differences in the cell membrane between the two categories
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Typhoid Fever Typhoid fever is a life-threatening disease of the intestinal system caused by the typhoid bacillus‚ Salmonella typhosa‚ which lives only in humans who carry it in their bloodstream and intestinal tract. Typhoid fever is spread when the bacteria is "shed" by infected people who handle food or fluids without washing their hands‚ or when sewage carrying the bacteria contaminates water‚ milk‚ and other foods. Although relatively rare since the advent of vaccines and improvement
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Aseptic technique Michele Pearson‚ Leah Christine Silver‚ and William Jarvis Purpose Aseptic technique is employed to maximize and maintain asepsis‚ the absence of pathogenic organisms‚ in the clinical setting. The goals of aseptic technique are to protect the patient from infection and to prevent the spread of pathogens. Often‚ practices that clean (remove dirt and other impurities)‚ sanitize (reduce the number of microorganisms to safe levels)‚ or disinfect (remove most microorganisms but not
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