Principles of Instrumental Analysis
Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
bartleby

Concept explainers

bartleby

Videos

Textbook Question
Book Icon
Chapter 32, Problem 32.18QAP

The streptomycin in 500 g of a broth was determined by addition of 1.25 mg of the pure antibiotic containing 14C. The specific activity of this preparation was found to be 240 cpm/mg for a 30-min count. From the mixture, 0.112 mg of purified streptomycin was isolated which produced 675 counts in 60.0 min. Calculate the concentration in parts per million streptomycin in the sample.

Blurred answer
Students have asked these similar questions
Protein phosphatase 1 (PP1) helps regulate cell division and is a possible drug target to treat certain types of cancer. The enzyme catalyzes the hydrolysis of a phosphate group from myelin basic protein (MBP). The activity of PP1 was measured in the presence and absence of the inhibitor phosphatidic acid (PA). [MBP] (mg-mL-¹) 0.010 0.015 0.025 0.050 Vo without PA (nmol-mL-¹ min-¹) 0.0209 0.0355 0.0419 0.0838 Use the data in the table to construct a Lineweaver-Burk plot. What type of inhibitor is phosphatidic acid? Uncompetitive Noncompetitive Mixed inhibition Competitive Vo with PA (nmol-mL-¹ min-¹) 0.00381 0.00620 0.00931 0.01400
A trypsin enzyme assay was performed by mixing 50 µL of trypsin with 950 µL of substrate in a cuvette with a pathlength of 1.00 cm. The absorption coefficient for the product formed by this reaction at 480 nm is 4130 M-'cm'. The rate of change in absorbance at 480 nm was 0.129 abs/min. What is the rate of this reaction in units of µmol/min?
explain why? • Levofloxacin is a broad spectrum antibotic. It is reported that itis completely removed in an unchanged from the body and itselimination half life is 7 h. Determine the amount oflevofloxacin eliminated in urine at 10 h following IV bolusadministration of 6,25 mg/kg dose to a patient weighing 80 kg.a. 185,75 mgb. 314,25 mgc. 314,25 mg/kgd. 18,57 mg How long will it take to lose 75% of the administered doseof a drug from the body if the drug follows first orderprocess?a. 3,32 half livesb. 2,32 half livesc. 2.0 half livesd. None of the above
Knowledge Booster
Background pattern image
Chemistry
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Principles of Instrumental Analysis
Chemistry
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Cengage Learning
Enzymes - Effect of cofactors on enzyme; Author: Tutorials Point (India) Ltd;https://www.youtube.com/watch?v=AkAbIwxyUs4;License: Standard YouTube License, CC-BY
Enzyme Catalysis Part-I; Author: NPTEL-NOC IITM;https://www.youtube.com/watch?v=aZE740JWZuQ;License: Standard Youtube License