Huma Qureshi

12 Questions 16 Answers 0 Followers

Questions related from Huma Qureshi

How expected yield is estimated for %yield of plant extract?

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 8,941 3 View

Please comment the highlighted section for its acceptability...?

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 701 2 View

What is meant by antigiardial activity?

what is exact meaning of antigiardial?

07 July 2015 7,308 0 View

Application of whole metabolome analysis in plants?

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 1,867 0 View

What makes methanol more appropriate solvent?

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 2,439 2 View

Why do we extract dried, ground plant material instead of fresh one?

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 5,672 16 View

Can anyone recommend a protocol to assess phytodiversity loss due to invasions?

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 5,952 3 View

Is it necessary to test all organic fractions for selection of plant with highest activity?

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 7,242 13 View

Can anybody brief the key steps from isolation of most active fraction to most active phyto-compound?

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 8,099 4 View

How do I extract a pulpy plant tissue?

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 2,609 10 View

What are suitable parameters for comparison of species composition of paired sites?

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 3,407 11 View

Is there a database enlisting signature metabolites in particular plant species?

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 10,033 16 View