Destinie Bradford Bio 1040 18 February 2013 Critical Analysis of DNA Replication in Bacteria DNA replication is a biological process that occurs in all living organisms and copies their DNA; it is the basis for natural inheritance. The process starts when one double-stranded DNA molecule produces two identical copies of the molecule. The cell cycle (mitosis) also pertains to the DNA replication/reproduction process. DNA replication‚ in eukaryotes‚ is controlled within the context of the cell cycle
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Bacteria iii. Chlamydomonas iv. Spirogyra v. Penicillum mycelium condidiophores vi. Cladophora vii. Volvox viii. Paramecium caudatum ix. Escherichia coli x. Bacillus subtilis xi. Staphylococcus aureus xii. Aspergillus condidiophores xiii. Amoeba Proteus
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Title Antimicrobial properties in different type of plants. Introduction A substance that kills or prevents the growth of microorganisms for example bacteria‚ fungi or protozoans is called an antimicrobial. This substance has 2 major roles which are to either kill microbes (microbiocidal) or prevent the growth of microbes (microbiostatic). Disinfectants are antimicrobial substances used on non-living objects outside the body. This substance included antibiotics‚ antifungals‚ antiprotozoals and
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plate seemed to show that E. coli did not have lipases because it did not have clear zones. Staphylococcus aureus seemed to have these clear zones meaning it can secrete lipases. The bacteria Bacillus subtilis did not grow well to see if there was a clearing. After doing some research‚ it was shown that B. subtilis is lipase positive so there should have also been some clear sones like the Staphylococcus aureus (Watson). The DNAse agar could not have been analyzed because HCl was not available to precipitate
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Med Res 2005; 36: 464-467 * Molan P.C. (1997) The antibacterial activity of honey. The nature of the antibacterial activity‚Bee World 73‚ 5–28. * Mundo MA‚ Padilla-Zakour OI‚ Worobo RW. Growth inhibition of foodborne pathogens and food spoilage organisms by select raw honeys. Int J Food Microbiol 2004; 97: 1-8. * Tumin N‚ Halim NA‚ Shahjahan M‚ Noor Izani NJ‚ Sattar MA‚Khan AH‚ et al. Antibacterial activity of local Malaysian honey. Malaysian J Pharma Sci 2005; 3: 1-10.
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hence‚ this study. The disc diffusion method was used to determine the antibacterial activity against gram positive and gram negative bacteria (standard strains and clinical isolates). Antibacterial activity was tested on E. coli‚ S. aureus‚ B. subtilis and P. aeruginosa. Results show that there was no formation of any zone of inhibition as observed after 24 hrs. Thus‚ this justifies the traditional use of the plant as decoction treatment for various ailments. Various concentrations of crude
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Engineering‚ Da-Yeh University‚ 112 Shan-Jiau Road‚ Da-Tsuen‚ Chang-Hwa 51505‚ Taiwan‚ ROC Accepted 9 April 2001 Abstract This review article deals with the chemistry and biosynthesis of poly-(c-glutamic acid) (c-PGA) produced by various strains of Bacillus. Potential applications of c-PGA as thickener‚ cryoprotectant‚ humectant‚ drug carrier‚ biological adhesive‚ ¯occulant‚ or heavy metal absorbent‚ etc. with biodegradability in the ®elds of food‚ cosmetics‚ medicine and water treatments are also
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Pure Culture Techniques In this first lab‚ you will be learning some very fundamental and important techniques. As is the case with most things‚ shorts cuts usually get you in trouble. This is especially true in Microbiology. The techniques you will be learning tonight‚ if mastered correctly‚ will make your life and learning experience in Microbiology much easier‚ if you don’t pay attention and practice these techniques incorrectly‚ well then……? Today you will be learning the following techniques:
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bacteria that retain the color from the primary stain is called gram-positive. Bacteria stain differently because of chemical and physical differences in the cell wall. Procedure For this lab we used three cultures; Escherichia Coli‚ Bacillus Subtilis‚ and Staphylococcus Epidermidis. Using a different slide for each sample we started by preparing and fixing each slide. Next we covered the slide with crystal violet for 30 seconds then rinsed with water. Next we covered the slide with Grams
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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. 1.0 Introduction Microbiology is the branch of biology that deals with microorganisms and their effect on other living organisms. Microbes are very small organisms which can only be viewed with the aid of
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