Homework Answers
We can expect a sample of soil taken from a garden to be positive for nitrate reductase (NR). The detection of this enzyme is reported (Abdelmagid and Tabatabai, 1986). It is also reported that the inactivation of nitrate reductase can be achieved at 40 degree celsius temperature and complete destruction by steam sterilization.
Nitrate reductase is an enzyme that catalyses the reduction of nitrate to nitrite. Nitrate is a naturally occuring form of nitrogen in soil, which is created by nitrification from ammonia. NR activity can be estimated by measuring the amount of nitrite being produced from nitrate .
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1. Would you expect a sample of soil taken from a garden to be positive for...
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1. A soil sample is taken from a small test hole in a soil borrow pit....
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Would you expect the dipeptide valylalanine to give a positive reaction with nitric acid solution? Why...
Would you
expect the dipeptide valylalanine to give a positive reaction with
nitric acid solution? Why or why not?
3, Would you expect the dipeptide valylalani Why or why not? alanine to give a positive reaction with nitric acid solution? 4. In the chromatogram below, calculate an Re for each component of the mixture. Which componert is probably the more polar compound? Solvent front Origin From a book or Internet source, find the pl of the amino acid lysine. What...
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1. You are given a 1 gram soil sample of unknown bacterial load. After doing 10-fold...
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A soil profile is shown below. The soil sample is taken from depth of 11m, a) Is it OC or NC soil? b) If it is loaded with A6= 28 t/m2 calculate the settlement of clay layer. For sand Ydry = 1.75 t/m and Ysat = 2.0 t/m3 For clay Xsat = 1.9 t/m3 6'o+A6 SC 6'o+A6 CsH Сен -log 1+ Sc log 087645) 610 1+eo 610 Sc CH 1+0 -log 6) + CCH 1+ -log (9729) 610 Sand 5m...
1. A soil sample is taken from a small test hole in a soil borrow pit. The volume of the test hole is 5 ft. The wet mass of the soil is 18 kg and the dry mass is 21 kg. The specific gravity of the soil solids is 2.65. ( m 35. 3147ft)(1 kge 2.205 lb) ( 1 lb= 0.2248 N) Determine: a. Wet and dry density (Mg/m) b. Wet and dry unit weight (pcf) C. Water content (%)...
Would you
expect the dipeptide valylalanine to give a positive reaction with
nitric acid solution? Why or why not?
3, Would you expect the dipeptide valylalani Why or why not? alanine to give a positive reaction with nitric acid solution? 4. In the chromatogram below, calculate an Re for each component of the mixture. Which componert is probably the more polar compound? Solvent front Origin From a book or Internet source, find the pl of the amino acid lysine. What...
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