Heather Joesting

4 Questions 1 Answers 0 Followers

Questions related from Heather Joesting

How long can you store extracted xanthophyll samples?

Samples were extracted following Thayer and Bjorkmann 1990 using 80% cold acetone and were stored in a freezer in HPLC vials. Should I expect degradation of pigments with time?

11 November 2018 9,729 2 View

Are there any labs whose service includes HPLC analysis of plant pigments?

I am working on a project examining the xanthophyll cycle in a sand dune herb species, and I have the opportunity to receive some funding. I have had some trouble with the analysis on the HPLC and...

09 September 2018 4,253 0 View

Supplier for xanthophyll pigment standards?

I am trying to find a supplier in the US to purchase HPLC pigment standards for the xanthophyll cycle pigments, specifically antheraxanthin. I have found a supplier for zeaxanthin and...

11 November 2017 6,462 3 View

Does anyone know of a method to isolate glandular trichomes from a leaf and determine the exudate?

I have observed what appears to be glandular trichomes on the coastal sand dune shrub Iva imbricata. I hypothesize that these trichomes function to exudate salt that may enter the leaves through...

12 December 2014 7,287 2 View