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

Post evaluation of close range photogrammetry experiments ?

I am performing a simple close range photogrammetry test and comparing outcomes of photogrammetry tools such as VisualSFM, Meshroom, Colmap etc. Kindly advice, what post evaluation tests/ criteria...

13 February 2021 6,410 3 View

In your experience what is the difference between G.652D and G.655D optical fiber. In field and in lab?

In our current era there is a big confusion about the usage of G.652 and G.655 optical fiber cable. Theoretically G.655 is much better than G.652 but the operator feel that G.652 is giving almost...

11 February 2021 4,006 8 View

Various schools have emerged in the study of comparative literature. Mention the most prominent of them in a nutshell.?

Various schools have emerged in the study of comparative literature. Mention the most prominent of them in a nutshell. And he talked about one of them?

09 February 2021 1,099 8 View

Data balancing before test/train split or only training data balancing. which is correct?

While reviewing technical articles, I encounter some papers where authors have used data balancing before splitting test and train (on full data), and some only balanced training data and let the...

04 February 2021 1,446 0 View

How can we measure disease severity of a pathogen in a crop?

severity index, measuring method and procedure detailed

01 February 2021 1,160 11 View

Why can't ANSYS Mechanical APDL detect the volume of my design ?

The 1st image shows the moment when I import my design(IGES) into the Mechanical APDL. The 2nd image occurs when I wanted to Operate>Boolean>Divide Volume By Area. The design is a regular...

28 January 2021 2,962 3 View

What is role of chronopharmacology or circadian rhythms in metabolic diseases including obesity, diabetes and cardiovascular diseases?

Chronopharmacology is branch of biological science which deals with daily life, sleep and wake, day and night, feeding and fasting and other effects. we can manage many diseases including...

18 January 2021 9,045 3 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

Why there is no effective vaccine against Congo Fever (CCHFV)?

Why there is no licensed vaccine available against congo fever? Besides what should be done to make the globally recognized Congo Vaccine?

11 January 2021 4,475 4 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

Multi effect distillation modeling in EES?

Dear colleagues If anyone has a model of multi-effect distillation in EES or MATLAB software, please send it to me.

24 February 2021 7,282 1 View

What is the best etching method for Mg-Ca alloy?

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

How to dilute Toxin-DMSO solution?

I have a concentrated solution of a toxin(50 micromolar) in DMSO 100%. I need to dilute it inorder to dilute both the toxin and DMSO wich can be toxic to cells. Which would you guys recommend to...

19 February 2021 7,447 2 View

How to dissolve lyophilized silk fibroin?

Dear members of the community, I am trying to concentrate silk fibroin to 25 % (w/v). Nevertheless, i am struggling with the concentration step. I successfully achieve concentrations of 5-6 % of...

16 February 2021 1,808 1 View

I have some problems with the mass transfer part of the CFD simulation of membrane distillation.Can anyone help me?

I am working on modeling of Direct Contact Membrane Distillation system with COMSOL Multiphysics software. I have some problems with the mass transfer part of the simulation because I don't know...

14 February 2021 379 2 View

What are effective methods for removal of iron from organic acids?

I am seeking methods to remove trace iron from organic acids, including acetic acid, propionic acid, and formic acid. Distillation works, but is expensive. I'm looking for alternatives to...

31 January 2021 984 3 View

Why do the absorbance values of different concentrations of ascorbic acid solutions mixed with DPPH free radicals stay constant?

26 January 2021 458 14 View

Why degradation of pesticides is maximum at specific pH by using nanoparticles and nanocomposite?

actually, I am degrading pesticides by using inorganic composites the pH of the pesticide in distilled water is neutral the pH of nanocomposite is also neutral then why maximum degradation takes...

23 January 2021 8,775 3 View

In order to simulate a DWC in steady state, how to put the unit operations in the flowsheet of any process simulator?

14 January 2021 3,938 6 View