Theodor Wilhelm Engelmann was a German microbiologist whose 1882 experiment measured the effects of different colors of light on photosynthetic activity and showed that the conversion of light energy to chemical energy took place in the chloroplast. In 1881‚ he observed the movement of bacteria towards the chloroplasts in a strand of “Spirogyra” algae. Engelmann hypothesized that the bacteria were moving in response to oxygen generated by the photo synthetically active chloroplasts in the algae.
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The Effectiveness of Antimicrobial Agents Bacteria: Clearasil and Proactive Veronica Hillgren 11/16/12 FRI AM Question/ Hypothesis The purpose of my experiment is to find and compare the efficiency of Proactive™ and Clearasil™ acne products on certain bacteria. For myself‚ Clearasil™ works better than Proactive™ does when exposed to my pores‚ which are infested with bacteria. However‚ Proactive™ is widely known and has a large amount
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Purpose/Question being addressed: The purpose of this experiment is to determine which kind of drinks stain your teeth the most. The drinks that will be tested are tea‚ coke‚ and coffee. B. Research Facts/ Hypothesis: Research shows that the darker the drink is that you drink the yellower your teeth will become. Teeth are naturally white or off-white in color but build- up from foods and drinks such as coffee and tea over
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milk and preserve it from spoilage. These microorganisms that are used to ferment the product can be stained with the gram staining. Gram staining is the method of differentiating bacteria into 2 large groups of Gram-positive bacteria and Gram-negative bacteria based on their cell wall. Most of the bacteria or yeast in the starter cultures used are Gram-positive. Gram staining requires 4 types of solutions used in the procedure: crystal violet‚ mordant‚ alcohol and safranin. The Gram-positive microbes
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MATERIAL SAFETY DATA SHEET (MSDS) FOR PORTLAND CEMENT (Complies with OSHA and MSHA Hazard Communication Standards‚ 29 CFR 1910.1200and 30 CFR Part 47) CEMEX‚ INC. CEMEX CALIFORNIA CEMENT LLC VICTORVILLE CEMENT PLANT 16888 NORTH "E" STREET VICTORVILLE‚ CALIFORNIA 92394-2999 Section 1 - IDENTIFICATION Supplier/Manufacturer Emergency Contact Information CEMEX‚ Inc. CEMEX California Cement LLC Victorville Cement Plant 16888 North "E" Street Victorville‚ California 92394-2999
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Review Questions 1. Which type of S. pneumoniae strain is the most virulent‚ encapsulated or unencapsulated? 2. What allows S. pneumoniae to adhere to cell walls‚ phosphorylcholine or polysaccharide? 3. Which infections are most commonly caused by S. pneumoniae‚ arthritis & peritonitis or meningitis & bacteremia? both 4. What can society do to help protect itself from antimicrobial resistance‚ increase or decrease antimicrobial usage? Decrease usage 1. Staphylococcus aureus‚
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Increasing evidence suggests that the alarming rise in allergic and autoimmune disorders during the past few decades is at least partly attributable to our lack of exposure to microorganisms that once covered our food and us. As nature’s blanket‚ the potentially pathogenic and benign microorganisms associated with the dirt that once covered every aspect of our preindustrial day guaranteed a time-honored co-evolutionary process that established “normal” background levels and kept our bodies from overreacting
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Open Reading Frames * (ORFs) are regions with no stop codons. All genes reside in long open reading frames * Note that stop codons in other reading frames have no effect on the gene. * Can be searched in the genome sequence. Valid only for prokaryotes and lower eukaryotes. Protein Sequencing vs. DNA sequencing * We compare protein sequences‚ not DNA‚ because protein is more conserved in evolution than DNA * The organism’s survival depends on the protein being
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Title: preparation of films for staining Objective: to produce a thin smear of bacteria adhering to a clean microscope slide as preparatory to staining. Procedure: A. From broth cultures 1. Inoculating loop was sterilized using Bunsen burner and let to be cool before use it to obtain bacterial suspension from the tube. 2. The bacterial then placed in the center of the clean microscope slide. It also speared to produce thin films. 3. The films are set to air dry before wafting the slide gently
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7351_2006_1_S03 Rajiv Gandhi University of Health Sciences‚ Karnataka PM.D. [MICROBIOLOGY] DEGREE EXAMINATION Time: 3 Hours [Max. Marks : 100] PAPER I – GENERAL MICROBIOLOGY AND IMMUNOLOGY QP Code: 7351 Your answers should be specific to the questions asked. Draw neat labeled diagrams wherever necessary. Answer all questions LONG ESSAYS 1. 2. 2 X 20 = 40 Marks Discuss the production‚ properties and uses of monoclonal antibodies Discuss various in vitro antibiotic sensitivity
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