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- A batch of raw milk was tested and found to contain a bacterial population of 8xl06cfu/ml. It is to be pasteurised at noc for 33 seconds. The average D value at 52°C for the mixed population is 11 min. The z value is 10°C.i)Explain the terms "D value" and "z value".ii)Calculate how many organisms will be left after pasteurisation.iii)Hpw much time will be needed at 62°C to accomplish the same degree oflethality?iv. How much time will be needed at 82°C to achieve the same degree oflethality?Using the HSAB theory, predict the direction of the ff. reactions and explain. a. CdI2 + CaF2 ↔️ CdF2+CaI2 b. NH2- + H20 ↔️ NH3 OH- c. H2Po4- + H2O ↔️ H3PO4 + OH-What is known as Ziegler–Natta catalysts ?
- Many enzymes are inhibited irreversibly by heavy metal ions such as Hg2+, Cu2+, or Ag+, which can react with essential sulfhydryl groups to form mercaptides:The affinity of Ag + for sulfhydryl groups is so great that Ag+ can be used to titrate —SH groups quantitatively. To 10.0 mL of a solution containing 1.0 mg/mL of a pure enzyme, an investigator added just enough AgNO3 to completely inactivate the enzyme. A total of 0.342 μmol of AgNO3 was required. Calculate the minimum molecular weight of the enzyme. Why does the value obtained in this way give only the minimum molecular weight?asdbas14naming of CrSO3 both in Old nomenclature and Stock system