We are looking for a Candicidin D standard ?

More Gerry/Gerre A Quinn's questions See All

What is the most recent antibiotic to be approved for clinical use that has a significantly different core structure from previous antibiotics?

I was looking for the most recent antibiotic to be approved for clinical use that has a significantly different structure from previous antibiotics. Preferrably sourced from the natural...

04 October 2023 3,314 3 View

How soon can changes in lifestyle/behaviour be detected in the epigenome?

If you can change your lifestyle/behaviour, how soon can these changes be detected in the epigenome? How long (estimate) would this change be detected in the majority of cells? Can this change...

21 July 2023 3,933 1 View

Does anyone have any insight on the best scale to measure self control as a means of self-regulation?

Hi there - hoping to get an SME on self-regulation theory who might be able to suggest the most valid scale that is a reasonable length. There seem to be many synonymous constructs, from...

20 September 2022 9,134 0 View

Is there a good resource on chicken whole genome sequence?

I am looking for the WGS of a variety of Chickens (Gallus gallus) such as Rode Island Red or White Leghorn. I realize there might not be a great diversity between these breeds but I would like to...

21 April 2022 5,231 1 View

Will heating bacterial supernatant extract to 100 C for 5 minutes precipitate proteins?

I am trying to identify some small molecules in a bacterial supernatant extract. I would like to remove proteins to make mass spectrometry easier. I have tried protein crash with ACN but the...

03 March 2021 4,819 4 View

Estimate sex-specific survival from mark-recapture data using multi-site, sex-specific cormack-jolly-seber model?

I am interested in identifying sex-specific survival rates. I have a long-term dataset of individually marked birds from one breeding colony. Of these, I am able to genetically sex a subset....

14 January 2021 7,549 4 View

Can someone please share how to add a spherical wrap / correction to a visual stimulus presented to mice using python?

Hi all I use psychopy 3 to show mice a visual stimulus on an LCD screen while preforming acute extracellular recordings in vivo. I understand that one should use a spherical wrap to the stimulus...

22 November 2020 8,103 2 View

How do I find out what publications cited my article?

How do I find out what publications cited my article? Ronald Quinn

11 October 2020 1,021 4 View

Recommendation for stereotaxics head fix for acute visual stimuli experiments in anesthetized mice?

Hi everyone While the anesthetized mouse is held with stereotaxis ear bars and bite bar, we record LFP signals from the visual cortex in response to gratings presented on a 5' screen in front of...

21 June 2020 417 0 View

Best GST antibody for Western blot?

Hi, I am performing GST purification, however, I am getting poor signal with my GST antibody at the recommended dilutions -...

11 June 2020 9,950 1 View

Which type of compound does lamda max of 218 indicate in a uv-vis spectrum of a partially purified compound through column and TLC?

A crude extract of fungal culture using EtOH was subjected to column and TLC and partially purified compound was obtained. UV vis spectrum of the compound/s has max absorbance at 218nm. The...

11 August 2024 9,801 2 View

Can you connect an HPLC to a Mass Spec only at a certain time point?

Can anyone explain this method? Especially the last statement where it says only at 1.5 to 2.5mins was the MS/MS connected to the UPLC. How is that possible, is it a feature in this specific...

11 August 2024 8,141 3 View

GC-MS retention index prediticon?

Hello experts, Does anyone know any free software about retention index prediction ?

08 August 2024 7,403 2 View

How to calculate CCS for Sodiated adduct ions and Multiply Charged Ions?

I'm currently working on calculating the collision cross section (CCS) for various ions, and I'm facing challenges when dealing with sodiated and multiply charged ions. Most of the resources I’ve...

08 August 2024 8,329 0 View

Can I use a HisTRAP column for affinity chromatography?

I'm working on selecting antibodies against a recombinant protein that has a His-tag. My idea is to first bind the recombinant protein to a HisTRAP column and then use this column for an affinity...

07 August 2024 505 3 View

Separation of organic acids-HPLC?

Hello What should be done to separate and identify organic acids in HPC when their RetTime is the same?Like oxalic acid with Propanoic Acid.or acids that have a very close RetTime.

07 August 2024 8,782 3 View

Why is electronic energy 0.000 for liquid crystal compounds and is invariable with temperature in Guassian 09 software?

Are there any suggestions or insights you can provide to help address this problem

06 August 2024 1,443 2 View

RNA later for the preservation of RNA in fecal samples at room temperature for one day (37°C)?

I am planning to collect human fecal samples for metatranscriptomic analysis using MGI. These samples are from indigenous people living in a region with high temperatures. I will have access to a...

06 August 2024 1,367 3 View

How can we use mobile apps for improving students' academic performance?

Mobile apps can be a powerful tool for enhancing academic performance, how can we use mobile apps for improving academic performance

04 August 2024 9,492 0 View

Why is TLC not a form of partition chromatography?

Why is TLC not a form of partition chromatography and paper chromatography not a form of absorption chromatography?

03 August 2024 7,035 3 View

Markus Christ

Hi Gerry,

maybe one of the following suppliers can help you:

Racechemical (https://www.chembuyersguide.com/partners/racechemical.html)

Sinochem (http://www.sinochem.com/en/1165.html)

DSKBioPharma (http://dskbiopharma.com/)

Chemexpress (http://www.chemexpress.com.cn/)

Regards

Markus

Gerry/Gerre A Quinn

Great, thanks Markus

Thanks for the answers. One of my colleagues emailed me with this company as a supplier TOKU-E.com .