If you can believe it, we have unopened Qiagen Ni-NTA resin from the early 90s that has never been opened. It still has a scent of ethanol and is blue in color. It has been kept in 4C since purchased. Would this still be good to use?
Hi, could anyone recommend a plasmid and/or protocol for reporter gene assay in S. cerevisiae? I want to assess the effect of growth conditions on a transcription factor, so I want to clone it`s...
01 March 2021 210 1 View
Trying to gather insight from an unresolved discussion with a colleague here, and either the available literature surrounding this topic and/or my keywords in search of are lacking. Context:...
21 February 2021 6,389 3 View
Dear colleagues, I was just wondering if you can suggest a good method to get a rough estimation to the concentration of O2 and H2O inside the glove box as unfortunately, our glove box doesn't...
17 February 2021 1,012 3 View
Hi! I am looking for some specific information in regards to the minimum amount of UV intensity required to begin the photo degradation process in polymers. I understand each polymer is...
15 February 2021 7,703 4 View
This large international conference will be held online this year due to COVID. I am submitting a paper to the Technology Enhanced Language Learning track (8). It is about a topic I have never...
15 February 2021 1,975 15 View
Hello, I'm currently running a PCA on a polytomous data set (5 point Likert). I want to create a discrimination index to narrow down my items before running the PCA. After looking around, I'm...
13 February 2021 3,517 2 View
This is a follow-up on an earlier question regarding mechanistics of vaccines: why current vaccines don't block transmission. In summary, they don't engage mucosal immune cells to produce IgA....
08 February 2021 8,321 3 View
Dear all, High beurocracy hihly complicate field ecolocial and evolutionary research nowadays. Nearly all tropical countries (maybe all?) requires research permit for performitng research and in...
04 February 2021 3,672 6 View
I want to perform the synthesis of a hydrogel and I want to know if I can polymerize NIPPAm with PEGmethacrylate or only with PEGacrylate?
02 February 2021 2,106 6 View
01 February 2021 4,616 3 View
Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...
03 March 2021 5,978 5 View
I need to prepare a solution of Napabucasin (inhibitor of cancer cell stemness) in dichloromethane. The drug is expensive, so maybe somebody already tried to do it. If it is soluble, what is the...
02 March 2021 9,945 3 View
The reaction of APTES with salicylaldehyde in ethanol leads to the formation of imine compound yellow solid which is mention in literature, but I am not getting yellow solid I don't know why? when...
28 February 2021 2,955 2 View
I recently switched the company where we buy our DMEM/F12 and i have noticed a signficant change in growth for my human olfactory neurosphere cell lines
24 February 2021 2,268 3 View
I am planning my protocol for my dissertation for an experiment quantifying bacterial (E. coli) biofilm formation on micro-plastic (5mm discs of polyethylene bags) by conducting a crystal violet...
23 February 2021 7,868 2 View
As a beginner in electrochemistry, I tried to obtain cyclic voltamograms of commercial anatase powder deposited on an ITO substrate or on Eteck. After several attempts, I noticed that my cyclic...
23 February 2021 3,175 3 View
I need to synthesize MoS2 nanosheets by alternate methods without pure water as a solvent.
22 February 2021 9,246 1 View
I am currently working on my dissertation and want to explore the role of competence as a mediator between the effect of colour of clothes on voting intention (focus on Western countries)....
21 February 2021 8,609 1 View
I have used Picral etchant (4.2 g Picric acid, 10 mL Acetic acid, 70 mL Ethanol, 10 mL distilled water) but it didn't work. Is there any alternative?
21 February 2021 2,558 5 View
What does the color of a spiro-ometad film indicate? I got purple, green, red, even black color of the spiro film. Is there anything we can get from the preliminary color analysis(e.g. oxidation...
21 February 2021 1,831 4 View