Where can I find these two papers?

14 January 2021 1,572 3 View

After CRISPR and single-colony picking, cells reverted to WT?

Hi guys: I have been doing CRISPR knock-in and knock-out and one seemingly impossible scenario keeps happening. In the CRISPR knock-in attempt I tried to add a tag on a gene of interest, so I...

07 January 2021 190 3 View

Is there any ingredient I an add into formula to slow down gas generation from Vitamin C?

I know Vitamin C is unstable and tends to be oxidized quickly. The problem here is I made a Vitamin C beverage at pH 4-5, and it starts to generate gas in the packaging, especially at high...

13 December 2020 6,055 1 View

Why use STOP solution in ELISA?

At the last step for data analysis, we always use a STOP solution to stop the TMB oxidized by HRP. Why do we have to stop the reaction? Couldn't we measure the color wavelength of...

17 November 2020 5,177 3 View

Why case-controlled study is more bias prone than cohort study?

I noticed from several articles saying that case-controlled study is more bias prone than cohort study (in the context of cancer early detection using molecular marker). I spent sometime to try to...

17 November 2020 1,878 4 View

How to determine fluorescence quantum yield for photoswitchable/photochromic compounds?

How to determine FQY for photoswitchable compounds? I found most related publications didnt mention, or just said that they used "Absolute quantum yield spectrometer." I think such technique...

31 October 2020 8,002 5 View

Signal phase shift after analytical calculation?

Suppose we have a signal as x(t) = exp(i(omega*t + phi)), after a simple calculation as y(t) = 1/x(t). We can clearly see that there is a phase shift of Pi=180deg. However, using directly...

20 October 2020 4,923 5 View

How to perform statistic analysis for age range between two cohorts?

Hi, I was reading the paper (MicroRNA Expression, Survival, and Response to Interferon in... ). In Table 1, I'm wondering how did the authors calculate a p-value of 0.29 for Age? The age in Table...

20 October 2020 2,276 5 View

Is RNALater (Qiagen) or Nucleoprotect RNA (Macherey-Nagel) compatible with High Pure Viral Nucleic Acid Extraction Kit?

I am planning to preserve fresh bat guano in either RNALater or Nucleoprotect RNA but my lab has an excess of High Pure Viral Nucleic Acid Extraction Kits. Any idea if both reagents are compatible...

14 October 2020 2,848 2 View

Hi Dear, Could someone figure the pH out?

There are two Triz-base solutions, the pH of solution #1 is 6.85, the pH of solution #2 is 9.97. What is the pH after mixing the same volume (50 ml) solution together. Please figure it out step...

29 September 2020 1,741 6 View

How to visualise pathways from a phosphoproteomics dataset?

I am looking for something similar than Ingenuity Pathway Analysis (IPA) in which I can enter the proteins differentially phosphorylated and I can visualise the pathways these proteins are...

21 February 2021 8,923 4 View

What influences inter-day reproducibility in UPLC-MS/MS analysis?

I was analyzing some metabolites in human plasma. While the intraday precision of these metabolites was acceptable ( less than 20%), the interday precision was quite large. So what influences...

13 February 2021 9,183 9 View

A good day to you, Great minds. How do I evaporate hexane and Ethyl acetate extract of bacterial metabolite?

I'm really struggling with it. It takes hours on a water bath at 50 degrees

03 February 2021 1,619 3 View

Why some samples don't give any peaks in HPLC when the rest does?

Hello everyone, Last week we ran an HPLC assay with bacterial supernatant samples. The metabolites measured were SCFA and I used a dilution factor of 2 for some samples and 7 for others (because...

22 January 2021 8,667 6 View

LC-MS metabolomics data after annotation some have their compound name but no KEGG id or with KEGG id but no pathway. How to interprete?

Recently I have generated LC-MS metabolomics data. After annotation, some have their compound name but either no KEGG id or KEGG id but no pathway. How to interpret those compounds? Additionally,...

18 January 2021 1,938 3 View

How can I build a local KEGG db?

I want the info (gene name, metabolic pathway, and organism of origin) of some key identified metatranscriptome genes obtained from MG Rast (I have the sequences). The KEGG ftp site seems to...

12 January 2021 9,985 1 View

Is there any chemical or surgical method to induce hypoxia in mouse model?

Dear all, My question is about Inducible hypoxia in vivo (mouse model). I'm looking for some chemicals that can induce the pathway of hypoxia or some other techniques. If you now know something...

15 December 2020 866 6 View

What is the role of pO2 and pCO2 in cell culture?

Using a Nova bioprofile (https://www.fannin.eu/wp-content/uploads/2018/07/BioProfile-Flex.pdf) to sample my CHO culture daily I get various metabolite results and also pO2 and pCO2 results. I am...

13 December 2020 7,998 1 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

Analysis of significance by using R programming ?

Dear All, I have the data of metabolic pathways in case and control, well there are pathways which are represented several times due to the involvement of reactions in case, well now I would...

09 December 2020 4,494 5 View