Negative result on natural product sample cholinergic assay?

i have been doing cholinergic assay on natural product and for some of the samples, i get negative value for the inhibition activity. can anyone help me explain the meaning of the negative value...

17 February 2021 4,118 1 View

How i can reduce the number of atoms using Vesta ?

I'm a new Vesta learner, I have downloaded cif of Ch3Nh3PbI3. Total number of atom in chemical formula for Ch3Nh3PbI3 is 12. But when i convert this cif to poscar file using Vesta, total number of...

14 January 2021 5,733 11 View

For a new biofertilizer what efficient methods should I follow to test it's quality(non-presence of pathogens, types &number of symbiotic microbes)?

Also it's effects on plants.

22 December 2020 2,318 3 View

How to convert 30 ng of PCR product in microlitres?

11 October 2020 5,619 3 View

What is meant by awaiting reviewer selection after being under review in scholar one online submission system?

I have a submitted a manuscript The status was for two month under review then turned awaiting reviewer selection

31 May 2020 688 3 View

What is the best way to dilute cisplatin and 5-flurouracil for cells drug treatment?

I have the drug in crystal form and i want to dilute them in a way that i can store them for a long time. i want to use them on my esophageal cancer cell lines (using RPMI-160 as my cell media).

23 March 2020 6,596 4 View

Changing Aspen Plus non-conventional component into a mixture of few conventional compounds?

I have performed a bio-refinery simulation on Aspen Plus using non-conventional components. Now, what I am willing to do is to specify one of the product (non-conventional) into a mixture of some...

12 February 2020 5,469 4 View

What are physical or structure parameters can determine from the XRD for the amorphous state?

Hello dear researchers, I have some XRD curves for some amorphous glasses system to confirm their glassy nature and I want use them in calculation of any physical parameters.

09 December 2019 2,201 6 View

What are the Elsevier dental journals free of charge? Any title kindkly ?

Free Elsevier dental journal

04 May 2019 1,206 1 View

Does this peak indicate titania nanoparticles ?

I wanna confirm If given peak represents the correctly synthesized titania nanoparticles... TIA

12 December 2018 2,621 4 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

What is the characteristic length to determine the Reynolds number for the scattered turbulent fluid flow?

Dear all, I just saw this example in FB on the difference between laminar flow and turbulent flow. The flow from a pipe hits the sink and scattered. The flow from the pipe is characterized as...

02 March 2021 1,999 5 View

How to quantify carbon deposition on CuZnAl catalyst?

Dear All, I want to quantify carbon deposition on the surface of the CuZnAl catalyst. I have tried thermogravimetric analysis, but I've got weight gain as the active Cu- get oxidised. Does anyone...

01 March 2021 1,907 3 View

Why Trivalent chromium start precipitating above PH 5 ? Moreover discuss difference between adsorption of chromium and precipitation of chromium ?

I am a student of MS Environmental Engineering and started my research phase. I am working on metal removal ( chromium iii ) by using activated carbon prepared from the agricultural feedstock. So...

01 March 2021 5,475 2 View

Can we distinguish the type of free fluid inside the pelvic and abdominal cavities whether blood or serous fluid using the ultrasound?

during ultrasound examination of acute abdomen, sometimes we see free fluid , can we know the type of fluid ,whether blood or not , using ultrasound only? if yes , what are the sonographic...

01 March 2021 7,476 4 View

How much pressure we can reduce at the outlet to avoid Reverse Flow?

I am simulating Heat Exchanger. I have tried and tested all the methods to resolve this issue from the internet like refining mesh, improving skewness and orthogonal quality ,extending outlet to...

01 March 2021 6,985 3 View

How to show arrows over the streamlines in CFD-post?

I follow this to make streamlines like the photos attached below: (software- CFD post-processing) First I plot the 2D streamline over a surface "streamline 1". them I plot a vector by the...

01 March 2021 8,668 3 View

How to increase mesh quality of a cfd model in ansys fluent?

How can one improve mesh skewness, orthogonality, aspect ratio?

28 February 2021 7,730 3 View

What is the density for pva electrospining?

I'm Juan Carlos, a high school student who is working with electropinning, I made an electropinning machine with a 21g needle and a 30kv high voltage source and the distance between my needle is...

28 February 2021 298 3 View