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Q1. Between March 2 and April10, five chronic peritoneal dialysis patients at one hospital became infected with Pseudomonas aeruginosa. Four patients developed peritonitis (inflammation of the abdominal cavity), and one developed the skin infection at the catheter insertion site. All patients with peritonitis had low- grade fever, cloudy peritoneal fluid, and abdominal pain. All patients had permanent indwelling peritoneal catheters that the nurse wiped with gauze that had been soaked with an iodophor solution each time the catheter was connected to or disconnected from the machine tubing. Aliquots of iodophor were transferred from stock bottles to small in- use bottles. Cultures from dialysate concentrate and the internal areas of the dialysis machines were negative; iodophor from a small in- use plastic container yielded a pure culture of P. aeruginosa. What improper method led to this infection?
Q2. In comparing the genomes of humans and those of our higher primates, it is seen that humans have a large metacentric pair we call chromosome among our 46 chromosomes, while the other primates of this group have 48 chromosomes and any pair like the human pair is not present; in its place the primate groups each have two pairs of midsize acrocentric chromosomes. What is the most possible explanation?
As a research scientist at Kellogg's, you are interested in ensuring that your crop of rice conforms to traditional properties found in the legendary Rice Crispy cereal.
Explain the principle and advantage of using a rapid identification system, such as the Enterotube. How would you rate the Enterotube system with conventional bacteriological procedures to identify members of the Enterobacteriaceae family? Why?
the reversion precisely reversed the original change that produced the typ- mutant allele.
Mating between black rats of identical genotype produced offspring as follows: 14 cream colored, 47 black, and nineteen albino.
In the jimsonweed plant, purple flowers are dominant to white. Self-fertilization of a particular purple-flowered jimsonweed produces 28 purple-flowered and 10 white-flowered progeny. What proportion of the purple-flowered progeny will breed true?
The forward primer was provided by the manufacturer as a lypophilized powder. If the manufacturer delivers 127.4 nmoles of this primer.
q1. a series of enzymes catalyze the reaction x y z a product a binds to the enzyme that converts x to y at a position
Which wavelengths of visible light carry the most energy? How does this relate to strategies for plant photosynthesis? Why was it important to mark the TLC plate with pencil?
You find out an unusual organism growing in the bark of a dying tree. Under a microscope, you observe that its cells are eukaryotic, have cell walls, and do not contain chloroplasts. Into what kingdom would you categorize this organism? Explain the d..
What error is the likely source of this intense color and are your results still valid?
Ampire females can not have children. Only human females can have half vampire / half human children. Both female and male vampires are venomous. List and describe the five pathogens described in the text that cause food poisoning.
Enzyme labeling can be used to map the structure of the active site of an enzyme using an affinity label, a molecule that is structurally similar to the substrate.
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