mohammad Anwar panezai Panezai

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Questions related from mohammad Anwar panezai Panezai

How to exprees the results of total phenolic contents as mg GAE/g dry weieght?

200 g fresh fruit puree is extracted with 200 ml of solvent on orbital shaker then filtration and desolvinization in rotary evaporator to obtain dry extract of 19 gram. Next 0.5 g extract was...

01 January 2019 7,829 5 View

Which solvent is apt for making different dillutions of crude extract of grape seeds, if the extraction was performed in acetone:water:acetic acid?

We have recently extracted the grape seeds with solvent mixture composed of acetone:water:acetic acid(90:9.5:0.5). Which solvent will be used or appropriate to make different dilutions of...

12 December 2018 8,587 6 View

Why my specrtophotometer does not show complete raw data of the desired scan range?

Hello we are working with shimadazu 1700 spectrophotometer compatible with PC. When i set the scan range from 400 to 900 nm for lambda max, after completion of the scan the raw data from 700 to...

12 December 2018 6,362 2 View

How to calculate extraction yield?

Most scientific papers have stated the formula for extraction yield calculation like this, The yield of extract (extractable components) expressed on dry weight basis of pulp was calculated...

06 June 2018 10,264 8 View

How to calculate TPC in GAE mg/g and GAEmg/100g dry weight basis?

My gallic acid curve is in the range of 50-250mg/L. Curve eqn is 0.0034x-0.0725 and abs value is 0.635. 1gram sample dissolved in 20ml from which 1ml was used in the TPC assay.

04 April 2018 10,036 0 View