Briefly explain why the 14C/12C ratio will decrease after the death of plants. A three- to four-sentence explanation is needed.
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Briefly explain why the 14C/12C ratio will decrease after the death of plants. A three- to four-sentence explanation is needed.
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- Give possible explanation why the American Heart Association recommend the use of canola oil or olive oil rather than coconut oil in cooking?The phenol concentration of wastewater was determined from three (3) parallel determinations, giving a mean of 0.513 μg L-1 and a standard deviation of 0.05 μg L-1. Decide at a risk level of 5% (or a confidence level of 95%) whether a reference value of 0.520 μg L-1 is statistically different.Suppose a city’s water supply has 0.2 ppb (1ppb=10-3 mg/L) of polychlorinated biphenyls (PCBs) in it. Using the PCB oral slope factor (7.7 (mg/kg-d)-1 and the EPA recommended exposure factors given in Table 6.14 below, (a) What would be the individual lifetime cancer risk for an adult male residential consumer?(b) In a city of 1 million people, use this risk assessment to estimate the number of extra cancers per year caused by the PCBs in the water supply. “Extra” cancers refers to cancers caused by PCBs (as opposed to other causes such as smoking, etc.)(c) Assume the average cancer death rate in the United States in 193 per 100,000 per year. How many cancer deaths would be expected in a city of 1 million? Do you think the incremental cancers caused by PCBs in the drinking water would be detectable?
- Consider the photos here which demonstrate antibiotic sensitivities of Staphylococcus aureus strains as determined by the Kirby-Bauer method. Abbreviations are as follows: C = chloramphenicol; CC = clindamycin; CZ = cefazolin; E = erythromycin; NOR = norfloxacin; OX = oxacillin; P = penicillin; RA = rifampin; SAM = sulbactam-ampicillin; SXT = sulfatrimethoprim; TE = tetracycline; VA = vancomycin. Imagine that only two cellular changes occurred in the original strain (the first image, on the top) that resulted in the resistance pattern of the strain in the second image (on the bottom). Which combination of mechanisms could explainthese results?Choose one or more: A.expression of efflux pumps B.overproduction of PABA C.production of β-lactamase D.altered penicillin-binding protein E.modification of either 50S or 30S ribosomal subunits F.altered DNA gyrasePlease note when values are from an external source/table. List any assumptions.Beginning with 2.0 ×104 cells/L, outline the Evans Blue method for counting viable and dead cells.
- Identify possible etiologic agents. (a) Enumerate diagnostic tests for the said etiologic agent and choose the one you will order for your patients. give answer asap pleaseHow many chloramphenicol capsules, each containing 250 mg, are needed to provide 25 mg/kg/day for 7 days for a person weighing 200 Ib? Nb. Write your solution on a clean paper and box your final answer. x (whole number) = Blank 1 capsules Blank 1 Add your answerYou have an order for 1 gram of Cefazolin in D5W 100 ml. You have added 5 ml of sterile water to the 1 gram vial to reconstitute powder. However the recommended manufacturer’s diluent amount is 10 ml of sterile water for a final concentration of 100 mg/ml. How would reconstituting the vial with 5 mls affect the concentration and the final calculated dose. Please answer with explanation ASAP. I will really upvote. Thanks
- Choose the best biomaterials (Metal, Polymer, Ceramic) for the following applications with the at least three reasons.Description of clinical trial process for the Pfizer-BioNTech. Incorporate the following key words: Length of trial; population diversity; efficacy; side effects Pfizer-BioNTechWrite any two places where methanogens can be found.