Any easy method of analyzing vitamin D in foods by HPLC?

Looking for method of extracting and analyzing vitamin D in foods by HPLC

24 February 2021 7,524 7 View

Is it possible to use too much lysis buffer?

We are using a mechanical pipetting machine to pipette lysed cells in buffer into a 96 well plate from a 24. The protocol asks for 100 uL of lysis buffer to be used in the 24 well plate, but this...

15 May 2016 7,043 6 View

Is the modern approach to cosmology fundamentally flawed?

With the substantial amount of anomalies, paradoxes and unexplained phenomenon in mainstream cosmology, one must question whether the modern approach in this field is sufficient. In most fields of...

25 October 2015 4,057 75 View

What is the most appropriate column (HPLC) for separating hydrocarbon, terpanes, steranes and aromatic steranes, and isorenieretanes?

I work with biomarkers applied to organic geochemistry, characterization of oil samples (petroleum), sediments, and rocks ... And intend to purify classes of hydrocarbon (saturated and...

19 September 2013 5,840 1 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Is my GFAP staining in right position?

I was differentiate hESC to astrocyte. In the second week of differentiation, I stained my cell with s100beta and GFAP. I expected that the staining site of GFAP would come from the cytoplasm,...

15 February 2021 8,982 1 View

Purified protein requires Calcium for activation, but the elution buffer I used seems to interact with Calcium, help?

09 February 2021 6,946 4 View

Why am I getting such large heats of dilution in my Isothermal Titration Calorimetry Experiment?

I am trying to measure binding of calcium to an expressed protein we are studying and am getting very large heats of dilution for the calcium solution in my control tests. We prepared a 1 M CaCl2...

07 February 2021 7,532 1 View

How can you accurately induce calcium overload and measure membrane potential in cultured Tg2576 neuronal cells using whole cell patch clamp method?

Hi there, I'm currently working on a project where i need to design an experiment but as i have little to no experience with this level of experimental design and no face to face help i am really...

22 January 2021 6,728 3 View

Can zinc based fixatives be used after enzymatic dissociation of neural tissue?

I am working on a FACS experiment with mouse neural tissue. I want to preserve all cell types as much as possible and the zinc fixation papers I have read use mechanical dissociation which can...

21 January 2021 4,430 1 View

Why calcium oxide nanoparticles becomes black at 650 degree temp?

Please tell me, which temp can I select for neglect black color of the Calcium oxide nanoparticles ..

14 January 2021 5,341 5 View

What acid can be used to dissolve limestone to extract microfossils?

I am trying to extract possible Loriciferans from mudstone, attempts with acetic acid (15%) and chloridric acid (37%) have failed to dissolve the rock, would a higher concentration (50%) of HCl...

17 December 2020 5,897 7 View

Can somebody recommend me a decent textbook to learn more about signaling pathways and their mechanistic principles in general?

I studied biochemistry and molecular biology in my bachelors and Immunology in my masters. I never came across a suitable course for general signaling pathways and principles. My interest is...

13 December 2020 5,690 5 View

How to quantify/detect change in fluorescence in calcium images from different sessions?

Hi, I have 2 3d tiff stacks collected by imaging along axial plane of mouse brain area in vivo from different days, before and after fluorescent viral injection. I want to detect changes in...

10 December 2020 5,046 3 View