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

What are anisotropic electrical and optical properties of a semiconductor due to?

In some materials, properties such as band gap, thermal conductivity differ along different crystallographic axes. What are the basics?

01 March 2021 1,923 3 View

How to address this issue in the analysis of Real-Time PCR results?

To dear Researchers, I was analyzing a series of concentration for estimation of Real-Time PCR efficiency. The concentration was 1:10. I used MS-excel to evaluate Slope. The result of slope was -8...

01 March 2021 8,683 4 View

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25 February 2021 5,713 1 View

Is the box plot of climatic indices better illustrate from daily data or annual data?

Hello, I hope you have a good time. I work on a research project about temperature indices. Due to the high number of indices, I only work on tables and maps on an annual time scale. In other...

19 February 2021 9,742 2 View

How can we determine the band gap of a composite material that is made up of a composition of direct and indirect band gap semiconductor materials?

I have a direct band gap material and an indirect band gap material. If I made a composite of both through physical mixing. Then how can I determine the band gap of such a material as the Tauc...

17 February 2021 8,104 4 View

How to best represent qPCR DD Ct or D Ct as a box plot?

I've been reading up on how to best represent qPCR data, specially on answers given on this site by Dr. Jochen Wilhelm. I understand box plots are the way to go, but I still don't understand them...

11 February 2021 7,228 3 View

I am desigining UWB antenna with ecllipse shaped patch on HFSS.Why gain is coming negative ?

I am attaching my design and result of Gains.S11 parameter is less than -10dB from 3.1 to 9.8 Ghz.Z11 magnitude also lies between 40 -60 ohm for this range .Still gain is negative. Pls help

29 January 2021 4,334 3 View

Where to add metamaterial unit cells in microstrip patch antenna to enhance the antenna parameters?

In order to enhance the antenna parameters, meta-material unit cells are added but where to load them is more advantageous either at ground plane or at the patch side, also is it necessary to add...

24 January 2021 2,999 4 View

Why the bandgap of CH3NH3PbCl3 films are different for spin-coating method and electrospinning method?

The observed bandgaps are 3.8 eV and 3.4 eV for spin-coated and electrospun films, respectively. What are the possible reasons?

08 January 2021 5,646 6 View

How to calculate the band potential of a semiconductor material using energy band gap?

I am looking for methods to calculate the band potential of ZnFe2O4 and Fe2O3.

05 January 2021 6,416 2 View