Surendra Nath

10 Questions 7 Answers 0 Followers

Questions related from Surendra Nath

Hii I want to Develop heat map visualization at village level for Telangana state, How to?

Hii colleagues, I have data set for a particular district of telangana state, India. The data is about area particulars - village level for Mango in Adilabad District, Telangana state, India and...

08 March 2020 5,711 5 View

Sex determination in papaya?

I have heard a lot about the impossibility of detecting sex of gynodioecious papaya by any possible means at the nursery stage. Is it really so? i have tried googling but in vain further...

25 July 2016 3,902 3 View

Most of scientists tell that the Error degree of freedom for any agricultural design should be >12, Why so?

While fixing agricultural experiment design such as CRD, RBD, LSD, SPD etc most of scientists caution that the error degree of freedom should be greater that 12. but can anybody let me know the...

01 May 2016 8,098 9 View

How to analyze or interpret DPPH data?

Friends, I have doe antioxidant assays DPPH and Total antioxidant activity (TAA) for extracts of marigold germplasm. After the procedures I have obtained the OD values but now I need to analyze...

04 March 2016 8,658 4 View

How can I extract free flowing lutein from marigold oleoresin in workable quantities?

I have extracted marigold oleoresin using petroleum ether and have confirmed the presence of lutein but want to quantify it. And also for nanoencapsulation purpose how to seperate pure lutein from...

07 June 2015 7,017 3 View

How much of lutein standard is generally needed for analytical purposes?

Since lutein standard is expensive, can somebody please specify around how much needs to be purchased, for my marigold analytical purpose.

15 March 2015 4,289 3 View

What are preparative, semipreparative and analytical HPLC?

Please help me in understanding the exact differences between analytical HPLC, semipreparative HPLC and preparative HPLC. I want to extract pure lutein compound from marigold oleoresin and people...

15 March 2015 970 6 View

Can someone suggest some materials that can be used as a standard lutein?

I'm studying on marigold oleoresin extract which contain lutein. For TLC, HPLC etc. studies I need standard to confirm its prescence. Sigma standard is available but it's too costly. INR...

06 March 2015 9,976 10 View

Cna anyone tell me how to practically do in vitro propagation for orchids using seed?

I have got Coelogyne pods and Knudson C medium for orchid seed germination, but since the seeds are too small and fibrous to handle, feel it extrmely difficult to do and sow uniformly on the...

05 March 2015 1,907 5 View

Can anyone help with extraction techniques, especially soxhlet?

I'm doing my research on lutein extraction from marigolds, and further its encapsulation. I have many articles regarding different methods, especially soxhlet, enzymatic extraction and...

25 October 2014 7,704 5 View