Jovale Vincent Tongco

14 Questions 81 Answers 0 Followers

Questions related from Jovale Vincent Tongco

Can anyone help me access this book or a portion of it?

Oliver, B. (1959). Medicinal Plants in Nigeria. Nigerian College of Arts, Science and Technology, Ibadan.Thanks in advance! Regards.

12 December 2014 744 1 View

Can anyone help me obtain this paper?

I need this article as main reference. I requested the full text from the authors here in RG but it seems like they are not yet members of this site. Thank you very...

07 July 2014 8,511 3 View

Does anyone have experience doing tyrosinase inhibitory measurements of crude plant extracts or isolated compounds?

I am looking for clear-cut protocols for the quantification of tyrosinase inhibition of plant extracts or isolated compounds from plant sources. What are the differences if crude extracts were...

03 March 2014 4,661 4 View

Is it possible to extract Cholecalciferol (Vitamin D3) from plants?

I may have detected vitamin D3 from my plant extracts using GC-MS. I searched the literature and came up with studies that say it's possible and others that says otherwise. What is your expert...

02 February 2014 7,511 11 View

Do you have any procedures or papers regarding analysis of phenols using HPLC-MS/MS?

I am planning to profile the phenolics in my plant extract using HPLC-MS/MS.

10 October 2013 5,554 4 View

UV-Visible Spectra Database - can anyone help?

Does anyone know a free online UV-Visible spectra database where someone can compare and verify their experimental spectra with? I am dealing with organic compounds (e.g. phenolics).

09 September 2013 2,186 12 View

Column chromatography of phenolics?

Can anyone provide some relevant information on using column chromatography in separating phenolics from crude plant extracts? Is it ok to use silica gel or do I have to use another type of...

09 September 2013 5,248 25 View

Does anyone have experience doing anti-inflammatory property measurements using interleukin-8 (IL-8) gene expression inhibition test?

Is it possible to test IL-8 gene expression inhibition on ethanolic extracts? I am planning to do anti-inflammatory property measurements of my leaf extracts. Please give me some advice and...

08 August 2013 6,581 3 View

Does anyone have experience with separating phenolics via column chromatography?

Please give me some pointers and things to consider in phenolics separation using column chromatography. What are your experiences in doing so? What specific solvents did you use to elute your...

08 August 2013 6,004 7 View

Does anyone have experience with qualitative and quantitative determination of cyanogenic glycosides in plant extracts?

I am planning to add either a qualitative detection or quantification of cyanogenic glycosides on my research. Please help me find protocols and methods in doing such analyses. Depending on the...

07 July 2013 10,032 6 View

ACE inhibition assay

I want to test the ACE inhibitory effect of my phenolic extracts. Can you give me a proper and suitable protocol for doing it? My phenolics came from the leaves of a plant material.

07 July 2013 6,419 10 View

Determination of Pb and Co in plant samples using AAS

Please include all necessary procedures and sample preparation (e.g wet digestion, dry ashing, etc.). If you have methods derived directly from AOAC, published article, or other standard...

06 June 2013 5,364 15 View

Chromatographic profiling

I'm thinking of using either 2D paper chromatography or column chromatography. Which do you think is better if I have many compounds on my sample and I want to estimate their quantity?

06 June 2013 2,258 6 View

Commercial tea extraction?

What solvent (system) would you recommend if I'm to extract major components from a commercial tea product. I am thinking of using acetone-water as my solvent. I am planning to do Soxhlet...

04 April 2013 6,766 9 View