Why am I getting singlet instead of triplet for my sample?

Both 1H and C13 NMR values of my sample can be assigned to a known molecule except at one place. From reference values and theoretical point of view, a methine proton (CH) near to a methylene...

10 November 2016 2,761 5 View

How do i detect difficult-to-stain saponins in TLC?

The only reagent that I could use to see something is Blood reagent but the handling of this reagent is not as easy as anyother reagents. The fraction of such interest has been tried with spray...

07 August 2016 7,371 3 View

TLC Solvent systems for methanol extract of bark?

Kindly share your experience, if any, with bark phytochemistry. It would be grateful if I get a good tlc mobile phase for studying methanol extracts of bark that is known to contain polyphenols.

08 September 2015 9,600 0 View

How can Soxhlet extraction be explained using a mixture of solvents?

05 June 2015 2,921 8 View

Is there a characteristic C13 peak in the NMR spectra for terpenoids and steroids?

Please tell me if there is any in order to distinguish the spectra of terpenoids and steroids.

04 May 2015 9,644 9 View

Does drying affect vitamin content of plant samples?

Can vitamins be estimated/analyzed from dried samples preferably dried at 40 degree celsius?

01 February 2015 1,744 11 View

Is there any negative impact of diethyl amine while using in column chromatography?

I would like to know if there is any especially while purifying a molecule and also in obtaining NMR spectrum of thus purified molecule. Does the presence of trace DEA or its impurities while...

01 February 2015 4,116 5 View

Has anyone ever used cheaper/small/moderate pressure pumps to increase the flow rate in columns?

I would like to have one for my RP open columns. Please share your experience and thoughts. Also please share what kind of pump you have employed for your work.

31 December 2014 5,521 5 View

Any easy explanatory notes about HMBC?

Looking for good explanatory notes to understand HMBC. Simple explanation with worked problem is also much appreciated.

11 December 2014 2,306 11 View

How do I remove perchloric acid from my samples so that it can be loaded onto HPLC columns?

It would be very helpful for my work if anyone can suggest a way to remove perchloric acid from my sample for further chromatographic studies.

10 November 2014 9,563 3 View

Guidelines for survey (question type) analysis?

Hi. Please tell me what guidelines should i need to follow for questionaries' type research work in India. It is not hospital based work, we are conduction basic institutional based qualitative...

03 March 2021 2,037 3 View

How to access MSCI KLD Stats and Sustainalytics?

Hello all, I'm currently working on my undergraduate thesis and I'm having difficulties trying to access KLD Stats and Sustainalytics because my campus Airlangga University and apparently other...

02 March 2021 8,525 1 View

Ideas for Phd's Thesis on pricing (Marketing)?

Hi everyone, I'm studying Marketing and I would like to write my PhD thesis on the topic of pricing. Any specific ideas?

02 March 2021 9,706 5 View

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02 March 2021 3,060 3 View

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02 March 2021 932 1 View

How to calculate BREQ 3 questionnaire?

how to calculate BEHAVIOURAL REGULATION IN EXERCISE QUESTIONNAIRE BREQ 3 ,which contain 24 questions and each question has 5 answers (0- Strongly disagree , 1-disagree, 2- Neither agree nor...

02 March 2021 811 3 View

Please suggest a good text book for "Research Methodology in Life Sciences". Which book would be good for PhD Scholars?

Please provide Book Title and author name

02 March 2021 9,059 3 View

How does Scientist/RG community evaluates a case study article and the impact of it on a researcher career?

An article that is published as a case study in the SJR listed journal. How much value is added to a researcher career? How it is evaluated by a scientific researcher/University admission...

02 March 2021 9,661 3 View

Could any one guide me, to write research proposal for grant? ?

We have one plant, the local people using this for controlling blood sugar, the toxicity and antidiabetic activity of the plant is not reported yet, please guide from whag should be the process ?...

02 March 2021 2,300 1 View

How to regulate SSCP temperature in simple PAGE?

I'd like to perform single-strand conformation polymorphism (SSCP) in my thesis, however I cannot control the temperature of the vertical PAGE since we are using the conventional tanks. Is there a...

02 March 2021 9,157 1 View