Bacteria have to developed a variety of mechanisms that allow them to enter the cells of their host‚ whether to replicate or to transmit the pathogen. One method of this is through pili. Pili are thin rods anchored to the outer membrane of bacteria with an adhesin at the tip. This adhesin is what gives the bacteria their binding specificity. Pili can serve a variety of roles such as‚ adhesion or the transfer of material during bacterial conjugation. Fimbria are a type of pili that are solely for
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how they helped with discovering translation‚ these three experiments help lead to the discovery of DNA. Before Frederick Griffith’s experiment‚ no one knew anything about DNA or what it was. Frederick Griffith studied two types of Pneumococcus bacteria‚
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others were even more specific and used only for cocci bacteria .The first procedure have been done was to observe and record the morphology of the unknown sample. However‚ Gram stain should be done to be sure that unknown sample were gram positive and to identify cells morphology. After that biochemical tests were chosen for unknown identification . first of all was done the catalase test to differentiate between the two types of cocci bacteria ( Staphylococcus and Streptococcus ) . Since unknown
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Everyone gets a certain cold in their life time‚ I’ve had plenty of them along with everyone else in the world. Bacteria is found in many different places‚ but some bacteria is worse than others‚ which can get you sick on certain occasions. These colds are usually treated with a antibiotics and will go away in a short period of time. Some bacteria however will develop a resistance to these antibiotics and are known as super bugs. These super bugs kill millions of people every year and will continue
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or fluid appearance is visible. Bacteria and background don’t have a much of difference in color. Although‚ bacteria are defined and visible noted. Most of the time they are single round cells. In direct stain with crystal violet‚ again background is colorless and glossy. Bacteria is blue and some uneven grouping is noted. In this example the dye methylene blue stain is used. In indirect stain with Congo red stain‚ background is again colorless and glossy. Bacteria are orange to red and fine defined
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toothpaste to oral bacteria VS the effect of mouthwash to oral bacteria Problem: Bacteria in ones’ mouth causes many problems for oneself in the future. For example‚ gum diseases‚ bad breath‚ etc..‚ Toothpaste and mouthwash is promised to kill most of the bacteria in one’s mouth‚ but which is more effective at killing the bacteria and preventing future problems? This experiment and research is going to prove which is more effective at killing oral bacteria. Purpose:
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could achieved of which different products to test for my concluding idea. The type of bacteria that I am going to discuss and chosen is E-coli. I will also going to research the effectiveness of antibacterial cleaning products‚ for instance sanitizer. I will also‚ research which is the most effective product for the house hold and some other work places. Background Information What are Bacteria? Bacteria are found in: soil‚ radioactive waste‚ water‚ plants‚ animals‚ deep in the earth’s crust
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acidophilus in sodium alginate is an effective technique of protection under simulated gastrointestinal environment. ------------------------------------------------- Introduction Lactic acid bacteria (LAB) are the organisms most commonly used as probiotics. Probiotic bacteria‚ lactic acid bacteria (LAB)‚ which are typically associated with the human gastrointestinal tract‚ have been reported to suppress the growth of pathogens (Coconnier et al.‚ 1993; Kaur‚ Chopra‚ & Saini‚ 2002; Lehto &
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empirical method to distinguish the species of bacteria into two groups Gram-positive and Gram-negative based on the physicochemical properties of the cells. First‚ a smear was prepared by use a sterile transfer loop that been flamed to removes some bacteria from slant agar and placed on the slide; mixed with one drop of water and let air dried. After dried‚ heat fixation the slide by passed the slide over a flame quickly 2-3 times to stick bacteria to the slide. Next‚ the smear was sequence covered
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A bacteriophage (informally‚ phage) is a virus that infects and replicates within bacteria. The term is derived from ’bacteria’ and the Greek φαγεῖν phagein "to devour". Bacteriophages are composed of proteins that encapsulate a DNA or RNA genome‚ and may have relatively simple or elaborate structures. Their genomes may encode as few as four genes‚ and as many as hundreds of genes. Phage replicate within bacteria following the injection of their genome into the cytoplasm. Bacteriophage are among
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