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Questions related from Huma Qureshi
While calculating the % yield of plant extract and fractions via liquid liquid partitioning, we divide actual extract yield by expected yield, How expected/theoretical/quantitative yield is...
12 December 2015 8,946 3 View
Generally we test all the organic fractions in search of activity based compound (e.g. for pesticidal activity we generally prepare organic fractions for different plant parts and select the most...
09 September 2015 706 2 View
what is exact meaning of antigiardial?
07 July 2015 7,313 0 View
Can anybody brief about or recommend a good document related to application of whole metabole analysis of certain plant, say for example any asteraceae member through LC/MS? What kind of...
06 June 2015 1,873 0 View
Methanol is polar, organic solvent. According to rule 'like dissolves like', this can extract organic, polar phytochemicals. Then why we extract our plant material initially with methanol and then...
03 March 2015 2,448 2 View
Botanists usually collect different plant parts, dry it and convert that into powder form for the extraction in different solvents. Why is intact fresh material not used for extractions?
02 February 2015 5,691 16 View
If somebody wants to assess the phytodiversity loss due to plant invasions, is the use of diversity and richness indices of invaded and non invaded sites and their comparison enough for a...
02 February 2015 5,959 3 View
If some one wants to check certain activity, say for example antimicrobial, for 4 or 5 different plants with aim to perform chemical characterization for plant showing highest activity, is this...
01 January 2015 7,249 13 View
I have tested different organic fractions of crude methanol extract of Parthenium hysterophorus leaves. Ethyl acetate fraction showed highest toxic activity. Now I would like to find out the most...
01 January 2015 8,103 4 View
Plant material is normally extracted after shade drying and grinding. Pulverized material is then extracted through different techniques like cold maceration or through soxhlet apparatus. If...
12 December 2014 2,617 10 View
Are Jaccard’s Similarity Index (JSI) and Sorenson’s Similarity Index (SSI) enough and reliable parameters for authentic comparison of plant community structures at two sites? If there are others...
12 December 2014 3,412 11 View
I want to enlist all the characterized secondary metabolites in a certain plant, what database/method I should adopt. So I can say with confidence, for example, that up till now 178 secondary...
12 December 2014 10,037 16 View