Describe some of the methods to test the stability and structure properties of an Anhydrous product
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Describe some of the methods to test the stability and structure properties of an Anhydrous product
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- Explain what method is used to identify the solid structure of the catalyst (catalyst characterization) and what parameters can be known through this method?The authors have used a chiral HPLC column (separating phase) to analyze compounds 4 and 5. Briefly describe a) the way a chiral HPLC column works to separate natural products of the Actinopyrone family and b) briefly comment on the general applicability of chiral HPLC columns in natural products research.Determine the weight/volume of the chemicals needed to prepare the following solutions: a) 100 ml of 0.9% (w/v) saline (NaCl) b) 30 ml of 50% glycerol (v/v) c) Electrophoresis requires TAE, which is a specific mixture of Tris base, acetic acid, and EDTA. TAE is normally made as a 50X concentrated stock. Provide a recipe to make 40 ml of 50X TAE. The recipe for one liter of 50X TAE is as follows: 242g Tris base, 57.1 ml glacial acetic acid, 100 ml 0.5 M EDTA
- State the conditions (temperature and pressure) above which chloroform exists as a supercritical fluid and give a literature reference for this information.Define sterols.a) What are the differences between the synthetically prepared hydroxyapatite and biologically derived hydroxyapatite? b) How do you define porous and dense hydroxyapatite? Please explain the differences? c) What is the importance of Ca/P ratio? Give example.
- Lipids from an organic sample are extracted separately by column chromatography using the ff eluants: 1st eluant - chloroform: methanol: water (6:3:1) 2nd eluant - methanol: chloroform (9:1) 3rd eluant – petroleum ether: ethyl ether (1:1) Test results for each eluate are tabulated below. Identify the possible lipid present in each eluate. Test Reagents 1. KHSO4 2. HNO3,(NH4)3MoO4 3. CHCl3, acetic anhydride, conc. H2SO4 4. -naphthol, conc. H2SO4 5. Hydroxylamine HCl, FeCl3 6. ninhydrin reagent POSSIBLE LIPIDS: Triacylglycerol, cholesterol, sphingomyelin, lecithinWhat non-titrimetric method can be used to determine the iodine value of edible oil? Discuss its basic principles and general methods involved.If a sample of beeswax is found to have an acid number of 15.5 and saponification value of 71.2, the ester value of the sample is: