Why does the fatigue cracks initiate from surface to interior as the stress level decreases?

It is well known that low-cycle and high-cycle fatigue cracks initiate from the surface, while ultra-high cycle fatigue cracks initiate from the inside. I am very curious why this transformation...

17 January 2021 9,633 6 View

How to understand the chemo-mechanical coupling?

Recently, I came into contact with a new discipline named chemo-mechanical coupling. I found that chemo-mechanical coupling phenomena exist in many research areas, ranging from development of...

17 December 2020 1,065 3 View

I am working on membrane distillation model in COMSOL and I have some problems coming in it?

I need to add a latent heat flux of evaporation to the hot side boundary, which is a function of the pressure difference between the cold side and the hot side boundary.However, the pressure at...

16 December 2020 9,890 1 View

How to spin coat thin film for PEC devices (improve viscosity)?

I am trying to repeat the fabrication of BiVO4 (BVO) using the metal-organic deposition method. This is a well-reported way to make BVO thin film on FTO. So basically, I just dissolve Bi(NO3)3...

18 March 2020 8,405 7 View

Why ecology system allows virus exsit?

27 February 2020 5,293 3 View

Reliable PGP9.5 antibody to visualize intraepidermal nerve fibres in rat paw skin?

Hi, I'm looking for a reliable PGP9.5 antibody that can visualize INEF in rat paw skin. Most publications with good image on rat paw uses Ultraclone or AbD Serotec's rabbit anti-human antibody...

19 February 2020 979 2 View

Differential Scanning Calorimetry (DSC) protein aggregation?

I am working on Differential Scanning Calorimetry (DSC) for my protein. Mainly I want to check its melting temperature and enthalpy changes. I first tried two standard proteins ( BSA and...

17 February 2020 1,733 3 View

Why does DAB staining not work, given that TSA on the same tissue works?

I am staining for c-fos in ferret brain sections using this antibody (https://www.cellsignal.com/products/primary-antibodies/c-fos-9f6-rabbit-mab/2250). The sequence of ferret c-fos is highly...

09 January 2020 4,671 1 View

What gas flow rate should I choose for calcinating CaCO3 in the air ?

A lot of papers talk about calcination temperature, but little of them mention the gas flow rate. I find gas flow has a strong influence of my catalyst... I am preparing an organic Calcium...

18 November 2019 2,879 1 View

How to perform GC manual headspace sampling?

Hi everyone. May I know is there an established method for GC-FID headspace sampling? I did triplicates for the same concentration of analyte via manual sampling technique (using a air-tight gas...

17 July 2019 3,428 3 View

Polymer composites suddenly solidifies?

I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...

03 March 2021 7,540 4 View

Chlorinated organic formation in odor control scrubbers using hypochlorite?

I'm involved in a study of odor control technologies for municipal wastewater treatment plant. One of the control options involves a chemical 2-stage (acid/alkaline) packed bed scrubber. The...

03 March 2021 3,661 2 View

What solvent can I used for Paal Knorr reaction between 6-amino hexanoic acid and 2.5 hexanedione?

I am try to make the Paal Knorr reaction between 2.5 hexnedione and 6-amino hexanoic acid, my problem is type of solvent to use, because 6-hexaminohexanoic acid is soluble in water but I am not...

02 March 2021 4,443 2 View

How to polymerize TEOS?

I want to polymerize TEOS on a surface. I know that NH4OH is a preferred catalyst and an alcoholic solvent should be used .But I can not find certain amounts of each material to use. Does any one...

02 March 2021 1,404 6 View

Ester cleavage conditions?

Hi all, I need to cleave the ester in Ethyl 2-amino-1H-imidazole-5-carboxylate to make the carboxylic acid and retrieve the product from solution to use in downstream applications of linking to...

01 March 2021 8,766 3 View

How can extract ciprofloxacin hydrochloride disolve in water er to organic solvent such as dichloromethan or any other solvent?

I need a procedure to extract the ciprofloxacin hydrochloride from aqueous solution by using dichloromethane in detail,. I thank you very much.

01 March 2021 4,306 1 View

How to separate water from glycerol solvent in a solvent recovery vacuum distillation column?

I am currently doing my third year design project. I have been assigned to design a glycerol recovery column in vinyl acetate monomer production. The process unit before the recovery column is an...

01 March 2021 9,525 4 View

Does any one can help me choose a reasonable basis set for intermediate metal ions interactions with guanine (i.e Fe2+, Mn2+, Cu2+ and exc.)?

Hello every body Does any one has any idea to help me choose a reasonable basis set for intermediate metal ions (i.e Fe2+, Mn2+, Cu2+ and exc.) interactions with guanine or other DNA organic...

01 March 2021 6,187 2 View

How to make fractions of chloroform extract of plant, using seperating funnel?

28 February 2021 8,466 2 View

Why am i not getting solid after reacting APTES with salicylaldehyde?

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