Berberine
I have a procedure for analysis of total Glycyrrhic acid in Liquorice Dry Extract. But I want to evaluate 18β-glycyrrhizic acid. Can anybody tell me what is the percentage content of...
09 October 2014 1,861 2 View
I have a problem of high bio burden (TAMC TYMC E choli etc) in some of my products. I have managed to reduce Yeast and Fungi with dry heating at 100 C but i am not able to reduce E .Choli . Please...
06 July 2014 756 4 View
I have an analysis which involves the use of Potassium Bichromate but I am not able to find it in any chemical list. Are Potassium Dichromate and Potassium Bichromate the same thing or different?
08 September 2013 9,324 2 View
I have a assay where absorbance has to be measured and in which the A% value is given and I want to find out the % of the material present. The method is according to the pharmacopeia . please guide.
08 September 2013 4,245 7 View
Please suggest a simple method of determination of chloride in berberine tannate. The method given in JP (Japanese Pharmacopoeia) is very complicated and is very confusing. Please suggest any...
07 August 2013 3,101 2 View
Can anyone guide me about the mixing ratio of Polyol and MDI for the formation of Polyurethane foam(PUF) and Polyurethane coating liquid?
04 May 2013 9,839 1 View
With varying concentration of Linalyl acetate, Linalool and β-Caryophyllene, how is the fragrance and the quality effected? What is the significance of these compounds in oils of lavender? Does...
03 April 2013 1,832 2 View
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02 March 2013 3,169 2 View
I have a project on designing of extraction plant by super critical carbon dioxide, what are the essential steps?
31 December 2012 7,786 2 View
What is the ratio in which Sodium Hexametaphosphate should be added in the boiler water to prevent scaling?
31 December 2012 995 3 View
Hey there, As a synthetic chemist delving into theoretical calculations for my imidazolium-based organic molecules, I would greatly appreciate any guidance on the appropriate input instructions...
09 August 2024 5,444 7 View
I am currently working on LncRNA; to know the lncRNA-protein interactions I want to do RNA pull down assay, so I need to design primers with T7 promoter. I need assistance in this regard.
07 August 2024 6,622 1 View
Hi all! My thesis groupmates and I are working on purifying an E. coli bacteriophage. The phage was handed down to us by the previous thesis group, but they only managed to purify it to about...
06 August 2024 5,801 4 View
I have used Prussian blue nanoparticles as a redox couple. The PBNPs have been made using only one salt precursor. Also, during scan rate studies, a small oxidation peak can be consistently found...
31 July 2024 9,697 0 View
Hello Everyone, While doing Boehm titration, We use nahco3 in order to determine carboxylic acids. Then the mixture was agitated. After a while, the solution was filtred and HCl was added. After a...
29 July 2024 4,048 4 View
After deprotection of the tert-butyl ester to generate the carboxylic acid in chloroform with TFA, my compound‘s pyridine moiety forms a TFacetate ammonium salt (small molecule drug, not a...
29 July 2024 9,753 3 View
Hello, colleagues! There is commenting open for new upcoming edition of USP 1033. Validation target acceptance criteria is now different from what it used to be and it doesn't include Cpm....
23 July 2024 7,292 3 View
"The Correlation between Nutrition and Transport Mechanism under Abiotic Stress in Plants: A Comprehensive Review" by Muhammad Saleem, Jianhua Zhang, Muhammad Qasim, Rashid Iqbal, and Li Song,...
23 July 2024 9,109 0 View
when we grow biofilm in test tube, the pipette often do not reach near the content. so we have to decane it directly or use a smaller test tube.
17 July 2024 3,532 0 View
I'm currently using Roche anti-DIG-AKP Fab fragments to perform Southern Blot assays, but this reagent is delayed since november last year. It's anybody facing the same problem? If so, how are you...
15 July 2024 6,668 0 View
