How to deal with the recudtion of amplification efficiency of indexed primers?

Hi all, I am now working with ITS2 sequencing library preparation. I had observed that after introducing adapters, linkers and barcodes to a primer, the indexed primers have a much lower...

27 January 2021 5,045 3 View

How is linear form of plasmid circularized?

Hi all, I'm working on transforming E. coli with plasmid in a mixture of linear and circular form. What happened to the linear form once uptake? Do cells ligate them directly? Or cell DNase...

13 January 2021 8,336 4 View

How to interpret the centrality indices in network analysis?

I learned that in order to interpret the centrality indices, the CS coefficients resulted from a bootnet test are preferably above 0.5 and above 0.25 is acceptable. In my network, the CS...

29 October 2020 3,545 3 View

How to create a graph of psychopathology symptoms when conducting network analysis in R?

I've been working on the network analysis of adolescent depressive symptoms. I've estimated the network, the centrality indices and network stability using packages qgraph and bootnet. Then I want...

22 October 2020 5,591 3 View

How to interpret the results of NetworkComparison Test when conducting a network analysis in R?

25 September 2020 9,936 2 View

Does anybody know how to use the Lagranto model?

These days I wanted to run the Lagranto model to track water vapor transport path. But I got some trouble in installing an available version of Lagranto model. I attempted to use "conda install -c...

04 July 2020 5,417 4 View

Abaqus & Fortran complier linking problem ?

Hi, I am trying to run a vumat subroutine, but there is some abaqus-fortran linking issue. I use abaqus 6146 Micrasoft visual studio 14.0 parallel studio XE 2016 I added these command in my .bat...

25 February 2020 5,698 2 View

How is dhdl calculated in free energy calculation module of Gromacs?

In theory, dH/dL (or dV/dL in thermodynamic integration) originated from the difference in enthalpies of two distinct states lambda and lambda+dL. I wonder how the Gromacs module calculates the...

24 February 2020 1,970 3 View

What could cause these "frowning" bands seen in electrophoresis (SDS-PAGE)?

As part of my western blotting procedure, I ran my SDS-PAGE electrophoresis. Usually, I load in 2 lanes, 1 ladder (spectra broad range protein ladder) and my sample (sample lysate + Laemmli...

30 October 2019 6,607 16 View

3'deoxy ribonucleotide available?

Hi, I wonder if people know 3'deoxy ribonucleotide (i.e. with 2'OH) is commercially available? I didn't find any in the modified bases product section in IDT, thermo, or sigma. I'd like to use...

14 October 2019 8,376 3 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View

How to accurately quantify chitin?

Hi all, I have been working on the quantification of chitin in insect samples and feed for a while but I can notice that the quantification methods (e.g. exposure to HCl, NaOH, and weighing sample...

01 March 2021 1,843 2 View

Can someone suggest a way to prepare slides to observe under confocal microscope for observing fluorescent tagged proteins??

I am growing the cells on coverslips and transfecting the fluorescent tagged protein directly on them. Then i want to observe these cells under confocal microscope. Currently i am just using...

01 March 2021 6,142 3 View

Why does intensity drops as concentration increases?

Is there any reason for decrease in fluorescence emission intensity of HSA,BSA when increase the concentration ?

28 February 2021 3,653 4 View

Why my agarose gel staining sometimes looks not homogenic but like gradient (see the figure)?

I am worried about this overexposure of the upper part of the gel in the picture. Is it possible that this is the result of too much concentration of ethidium bromide? Why is there such a big...

25 February 2021 8,140 3 View

Quantifying leaking DNA from bacteria - what's the secret?

Hi, all! I need to determine if my treatment causes membrane damage in bacteria (S. aureus and E. cloacae), but I cannot use a fluorescent probe such as PI and similar ones because my compound is...

24 February 2021 2,006 2 View

Did anyone perform CD107a degranulation assay without the use of inhibitors like monensin?

I am planning to perform a degranulation assay using CD107a antibody. Some resources suggest to use inhibitors like monensin to inhibit the intracellular traficking and acidification of the...

21 February 2021 6,260 3 View

What is the stability of 2 3-dihydroxyquinoxaline in acidic water?

I'm developing a UHPLC assay, and the fluorescent product is 2,3-dihydroxyquinoxaline. The reaction to produce this requires hydrochloric acid (about 1.2 M). Will storage in this acidic...

20 February 2021 5,820 4 View

Interpretation of a fluorescence Emission spectrum ?

Hello, i work with a spectrometer which only render the fluorescence emission spectrum. Until now i just found how to interpret an exitation- and emission spectrum together to generate deeper...

20 February 2021 1,291 3 View

Good day sir/ma. Please, where can I have access to equipment for conducting XRF, XRD and SEM analysis?

I'm using blast furnace slag for stabilizing subgrade soil.

17 February 2021 7,333 3 View