1. Researchers at the University of Adelaide, Australia, are proposing to control cyanobacteria with ultrasound. Research this topic using Internet resources, and answer the following questions: (a) What are cyanobacteria, and why are these bacteria important to control? (b) How are cyanobacteria traditionally controlled? (c) Why does the treatment propose using low-frequency ultrasound instead of high-frequency ultrasound?
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- Dichotomous key: d. Since gram-negative bacteria are generally more resistant to antibiotics such as penicillin, Gram staining can be used to inform appropriate antibiotic treatment for patients with bacterial infections. Based on the information in the key, infections caused by bacteria belonging to which genera would be most effectively treated with penicillin?8. What is a pure culture, and why is it important in microbiology?From chapter 15 of Modern Industrial Microbiology and Biotechnology(Okafor, N and okeke, C.B.2018) answer these under the chapter 1.Describe the relevance of supplementation of human and animal foods with amino acids.2. List methods of amino acid production.3. Briefly describe three types of microbiological methods of amino acid production.4. Describe the properties of Corynebacterium glutamicum which make it a novel organism for glutamic acid production.5. Why is it necessary to increase cell permeability for improved glutamic acid production?6. Discuss a method by which overproduction of amino acid is achieved.7. Explain how enzymes can be utilized to modify terminal pathways of amino acid synthesis.8. What are the advantages of the fed-batch fermentation over the batch fermentation in production of amino acids?
- 1) would you describe the contents of the soil-inoculated broth as being a “pure culture”? Why or why not? 2) How did the uninoculated broth differ in appearance from the broths inoculated with E. Coli and M. Luteus? And then how could you tell if a supposedly sterile, uninoculated broth was contaminated? Please explain in detail and highlight the important parts cuz I am confused and need help! Thanks1. Escherichia coli but not Pyrolobus fumarii will grow at 40°C, while P. fumarii but not E. coli will grow at 110°C. What is happening (or not happening) to prevent growth of each organism at the non-permissive temperature?1. What is the most common sterilization technique used in laboratories? 2. List at least 5 procedures of the aseptic technique and describe its uses. 3. Why is Gram stain one of the most important and widely used stains in bacteriology? 4. Explain the Gram staining technique in chronological order. Indicate the reagent used and the time of usage on each reagent.
- 53: Which of the following most correctly describes the type of lateral pressure used during an assessment stroke? A:feather- light lateral pressure B: moderate lateral pressure C: heavy lateral pressure D: enough lateral pressure to effectively remove the deposit 54: What is the term for the dense, non-mineralized , complex mass of colonies in a gel-like inter-microbial matrix? A: feather light lateral pressure B:moderate lateral pressure C: heavy lateral pressure D: enough lateral pressure to effectively remove the deposit1. What color does an acid-fast cell stain? 2. Identify two diseases that are caused by acid-fast bacteria. 3. In the endospore stain, what color do the endospores stain? 4. If you performed an endospore stain on Mycobacterium, what color cells would you expect tosee? Why? 5. How do capsules contribute to virulence of an organism? 6. Since you know what lophotrichous and amphitrichous arrangements look like, put thoseterms together to draw an amphilophotrichous bacterium. 7. Streptococcus pneumoniae that are capable of causing pneumonia are encapsulated bacteria(meaning they have a capsule). Describe what you would expect to see under themicroscope after performing a capsule stain with india ink and safranin.1. Where is staphylococcus aureus commonly found? 2. What staphylococcus aureus its significance in medical microbiology? 3. Is staphylococcus aureus an obligate aerobe or facultative anaerobes? 4. can staphylococcus aureus catabolism glucose or lactose? Does it produce strong acid products such as lactic or acetic acid? 5. Does staphylococcus aureus produce by product that are converted to alcohols?
- 6. Why is silver nitrate used in cauterization of wounds?1(a)What is a psychrotroph? (b)From what natural sources would you isolate a thermophile? A psychrophile? (C)How does temperature affect the growth of a microorganism? (D)State the temperature class for Escherichia coli, Bacillus sp, Aeromonas sp, Micrococcus luteus, and suggest their optimum growth temperature. 2 (a)Why is dilution important when determining microbe number? (B)How does a decrease in dye colour intensity affect the microbe ? (C)State the possible sources of error if plate counts and colour intensity of dilutions are incorrect or Precautions taken to prevent this from happening. ( this is not a graded assignment)1. Why is heating the inoculating loop so important in microbiology?2. Why is it that moist heat is chosen to be the most commonly used in sterilization? 3. What part of the flame is the best part to use to sterilize an inoculating loop or needle?