Examine the given table below. What conclusions can be drawn from the data regarding the effects of varying pH in bacterial activity? Explain and justify your points Table 1. Effect of different pH on Antibacterial Growth Diameter of Inhibition zone (mm) of different pH 7 6 8 30 21 15 42 34 21 50 41 33 30 22 20 Test organisms 5.8 33 44 54 Staphylococcus 33 aureus Escheichia coli S. typhi Bacillus subtilis 9 12 15 21 0

Examine the given table below. What conclusions can be drawn from the data regarding the effects of varying pH in bacterial activity? Explain and justify your points Table 1. Effect of different pH on Antibacterial Growth Diameter of Inhibition zone (mm) of different pH 7 6 8 30 21 15 42 34 21 50 41 33 30 22 20 Test organisms 5.8 33 44 54 Staphylococcus 33 aureus Escheichia coli S. typhi Bacillus subtilis 9 12 15 21 0

Aquaculture Science

3rd Edition

ISBN:9781133558347

Author:Parker

Publisher:Parker

Chapter2: Aquatic Plants And Animals

Section: Chapter Questions

Problem 2KA

See similar textbooks

Similar questions

Calibri Light (H.. v 11 A BIU ov Av A 2. Are bacteria unit- or multicellular? What about the chains or colonies seen in slides and. ヘ三 diagrams? Explain. A. Bacteria also play a role in the maintenance of healthy ecosystem. They help decompose decaying matter and help digest food in the guts of animals. 3. If a person is diagnosed with syphilis, which bacteria species is most likely the cause? A. Syphilis is usually a sexually transmitted disease, but it is occasionally acquired by direct nonsexual contact with an infected person, and it can also be acquired by an unborn fetus through infection in the mother 4. Think about Clostridium botulinum. Explain the terms below that describe this species. a. Gram-positive b. Anaerobic C. Motile d. Botulism 5. Explain why methicillin-resistant S. aureus (MRSA) is a problem in clinical medicine. 6. Do you see any nuclei in the specimens? What accounts for the colors of the cells? Explain. 7. Explain gram stain method in terms of how useful it is…
Search ew View Help O Editing v BIUQv Av A ニv三マ川 ... permitting the growth of gram positive bacteria. Is phenylethyl alcohol agar a differential or selective media? Selective media 5. A strain of Moraxella catarrhalis is able to grow on agar containing the antibiotic amoxicillin. You suspect this strain may contain the enzyme B-lactamase which inactivates amoxicillin, making it ineffective as an antibiotic. You grow the same strain in media containing amoxicillin and clavulanic acid (a B-lactamase inhibitor). What do expect the results to be; growth or no growth? Explain. s: On ENG 103 Project 1...pdf PDF Getting starte Personal Narrative..pdf PDF PDF
Answer the following questions briefly and concisely 1.How do bacteria in a chemostat and those in a batch culture vary from one another? 2. What happens in a chemostat if the dilution rate is higher than the organism's maximum specific growth rate? 3.Does a chemostat require the use of pure cultures? 4. Why would a complicated culture media for Leuconostoc mesenteroides be simpler to make than one with a fixed chemical composition?
use these OD numbers to plot growth curve for E. coli K12- and estimate generation time for this culture. Table 1. Absorbance (O.D.600) measured for growing culture of E. coli K12 (time course) Incubation time O.D.600 Incubation time O.D.600 O min 3 hrs 3 hrs 30 min 4 hrs 4 hrs 30 min 5 hrs 5 hrs 30 min 0.11 1.75 30 min 0.20 1.94 1 hr 1 hr 30 min 2 hrs 2 hrs 30 min 0.27 2.24 0.51 2.48 2.31 2.19 0.65 1.30
Antibiotic Code Zone of Inhibition (mm) S, I, or R? Penicillin P 15 Streptomycin S 8 Ampicillin A 25 Chloramphenicol C 14 Bacitracin B 5 QUESTIONS: Which antimicrobial agent was most effective against your organism? Can you determine from your results whether this antimicrobial agent will also be most effective against another bacterium? Why or why not? Is this technique measuring bacteriostatic effect, bactericidal effects, or both? Explain. 4) Consider the following list of hypothetical antibiotics, tested against Escherichia coli in a Kirby-Bauer test: Antibiotic Zone of Inhibition (mm) Astonostatin 12 Bodaciosporin 25 Crazifloxacin 5 Dorkimycin 16 When the above antibiotics were tested as treatments for E. coli infections in humans, it was found that Dorkimycin has virtually no effect on the infection, while Astonostatin is the most effective of the four antibiotics listed. Propose an explanation for this result. Based purely on these…
The following results were obtained from a disk diffusion test for a strain of Escherichia coli. Chemotherapeutic Zone of inhibition (mm) A 7 B 10 C 18 D 3 Which drug above (A, B, C, or D) is most effective against this E. coli strain? ***Which drug above (A, B, C, or D) is most effective against Staphylococcus aureus? Explain your answer.
8. A. Use Excel (or another graphing program) to draw the growth curve, In (X/X.) vs time, for bacteria grown in a 20 L suspension cell culture, given the following data: - initial concentration: 0.120 gdw cells/L Also report: - lag time: 1.5 hours - mass doubling time during exponential growth: 250 minutes - duration of exponential growth phase: 1 day (24 hours) - negligible time in the deceleration phase - 13 hours in the endogenous metabolism phase with no change in cell concentration - cell death rate with k = 0.0178 min -¹. B. What is the specific growth rate, µ? C. What is the maximum concentration of cells in the reactor? (gdw cells/L) and when does this occur? D. Other than time zero or the end of lag phase, at what time is the concentration of living cells in the reactor equal to the initial concentration of 0.120 gdw/L?
A Fig. 2 Result showing the effect of different germicidal soap on the growth of bacteria Guide questions: 1. Based from figure 2 which soap is most effective? Explain 2. Which is least effective? Explain 3. Explain the result of disc D.
1). SIM Tubes and TSI slants turn black if the organism is able to reduce iron compounds. For which organism(s) below would you expect a black reaction? Circle all that apply. Escherichia coli. Proteus vulgaris. Salmonella typhimurium. Alcaligenes faecalis. Shigella flexneri. 2). If Citrate is a sugar and fermentation generates an acid, why does the BromThymol Blue indicator in the media turn blue and not yellow? 3). Why is Salmonellosis associated with eggs? Can you get Salmonellosis from other animal sources?
The production of a product P from a particular gram-negative bacteria follows the Monod growth law max Cs Co Ks + C, rg = with max (a) The reaction is to be carried out in a batch reactor with the initial cell concentration of Cco = 0.1 g/dm³ and substrate concentration of Cso = 20 g/dm³. = 1 h-¹, Ks = 0.25 g/dm³, and Y₁ = 0.5 g/g. c/s = p/c Cc Cco + Yc/s(Cs0 - Cs) = Plot rg, -rs-re, Cs, and Co as a function of time. The reaction is now to be car (b) dilution rate at which wash-out out in a CSTR with Cso = 20 g/dm³ and Cco = 0. What is the occurs? (c) For the conditions in part (b), what is the dilution rate that will give the maximum product rate 0.15 g/g? What are the concentrations Cc, C₁, Cp, and ―r, at this value of D? (g/h) if Y
Imagine you have been given a liquid culture of yeast with a starting concentration of 3.67 x 10' cells/ml and are asked to carry out the sample dilution process shown in the figure below. 100μl 100μl 100μl 100μl 100μl 0.9ml 0.9ml 0.9ml H2O H₂O 6.9ml 0.9ml H₂O H₂O H₂O Original 10-1 102 10-3 104 Culture 105 100μl 100μl 100μl Plate A Plate B Plate C a. How many colonies should have been present on Plate A in this example? - Answers must be whole numbers as partial colonies are not expected. b. Imagine you carried out the same dilution scheme shown in the figure above, but now, you do not know the concentration of the original culture. If you counted 163 colonies on Plate B, what is the concentration of cells/ml in the original culture?
Hello, I want you pleaseeee to make a dichotomous key based on provided experiments to identify a an unknown bacterium mixture. It can be E. coli, B. Bulgaris, B subtilis, b aerogenes, m leuteus, s. Aureus, and s epidermisis. Make it based on these possible experiments: phenol red broth, mr/vp test, catalase test, oxidase test, nitrate reduction test, citrate utilization test, Malonate utilization test, decarboxylation test, starch hydrolysis test, dna hydrolysis test, lipid hydrolysis test, gelatin hydrolysis test, urea hydrolysis, SIM medium, triple sugar iron agar test, blood agar test. So far we have run a MAC agar and PEAA plate of the bacterium