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

Hi everyone, how can we remove the snow-covered areas in global scale?

We obtained the global results using remote sensing reanalysis dataset. But the snow-coverd areas should be removed (like the blank area in the picture below, sources: Purdy et al., 2016). Does...

20 September 2020 3,463 5 View

How to add a scale bar for images acquired from Molecular Device Imagexpress pico?

I saved some images when I scanned certain area using imagexpress pico. But don't know how to add scale bar either in system or image J. I am wondering if anybody can provide some help on that?

17 September 2020 8,068 4 View

How should I design the N-terminal VC plasmid of BiFC assay?

I'm going to detect protein-protein interaction with BiFC assays and my target proteins are ER retention with KDEL motif. so I want to fuse VC to the N-terminal of my protein. My question is if...

22 July 2020 3,456 1 View

How to grow more BL21 auxothrophic strain cells?

Dear all, I have just purchased a BL21 auxothrophic strain (RF12) from Addgene. The cells come in the form of agar stab. I intend to grow more cells which will be ready to used for protein...

11 May 2020 8,384 3 View

Roche has stopped its Universal Probe primer design service, does anyone know where or how we can design primers to fit Universal Probe Library?

Roche announced the Universal Probe primer design service will be stop in the end of 2020, but the primer design website has already been shutted...

10 February 2020 4,745 2 View

How do we make multi Fatsa files?

Hi, previously I had used MUMer to run but the input are only able to upload 1 Fasta file. When I test run a reference and the sample it work great but when I combine my sample 1 and sample 2 data...

25 July 2019 3,681 1 View

Does anyone know of a cancer cell line with c-myc gene amplified?

Breast cancer cells preferred, but other cell lines work too. Thank you.

06 May 2019 5,018 4 View

Is it possible and beneficial to learn probability distribution of input data when we apply machine learning methods like artificial neural network?

Hello, everyone! In recent time I am learning an online course called "learning from data". The lecturer showed the below learning diagram you can find from this website:...

29 October 2018 2,510 3 View

How to select the internal reference for the pseudo reference electrode?

Dear all, While use the pseudo reference electrode, internal reference need to introduce. In the non-aqueous electrochemical system, ferrocene is most used in literature. However, in aqueous...

30 July 2018 3,746 4 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

Why Austenite grains in steel show much more twinning than ferrite grains?

It is oftentimes said to be a distinctive metallographic trait that differentiates a fully austenitic and a fully felly ferritic steel without etching that might distinguish between two. Why...

02 March 2021 728 2 View

Modeling viscosity using model of Chung?

Hello, As part of simulation of gases mixture and water, I need to calculate viscosity of the fluid components and I am using relationships proposed by Chung et al. (1988). The irony is while I...

25 February 2021 8,053 5 View

Are there any candidates for an Einstein's bare cosmological constant?

It is commonly accepted that General Relativity has its own 'bare' cosmological constant that contributes together with the cosmological constant resulting from vacuum energy density for an...

23 February 2021 5,448 8 View

Resistivity of PVD TiNx thin films vs. N2 flow?

In the PVD of TiN thin films (~100A), I've found the resistivity of the TiN films dropped from ~100 to 60um*cm with N2 flow increasing up to the metallic mode ending point; then the resistivity...

21 February 2021 1,864 2 View

Why is there cloudy white solution in flavonoid test tube?

I do flavonoid test for biscuit incorporated with muntingia fruit powder. Sample extracted with metanol (1:10 ,w/v), macerated 24h, sentrifuged and filtered. Supernatan used for analysis. I have...

08 February 2021 6,779 4 View

What is the maximum storage time for samples used in soil enzyme assays?

01 February 2021 4,616 3 View

Difference between assessing EC50 in presence of physiological levels of human serum albumin and alpha1 acid glycoprotein vs. % human serum?

01 February 2021 1,825 1 View

What are the thermodynamic and kinetic similarities and differences among dendrite formation during solidification of metals, ceramics and polymers?

Basic dendrite formation of metallic alloys are explained by thermal and constitutional degree of supercooling and most-supercooled band of liquid somewhat ahead of solidification front that...

30 January 2021 8,450 2 View