How to find degree of deacetylation of chitosan colorimetrically?

I am working with low DD% chitosan. It doesn't dissolve completely in acidic solutions. How to calculate the degree of deacetylation by potentiometric and acid-base titration, UV spectroscopic...

27 January 2021 8,532 2 View

How can one determine the cause-effect relationship between two variables using linear/logistic regression analysis?

Isn't bi-directional effect/causality difficult to demonstrate? Could it be simply demonstrated by examining correlation, regression or any other metric to measure the goodness of fit? How can one...

17 August 2020 6,717 5 View

How to find if one sentence is negative of another using NLP ?

I have to do a project in which using the product description of any product at any e-commerce website and comparing it with all of the reviews of the product.I have to find out if the description...

26 February 2020 3,419 3 View

TLC cutting made easy, will it make TLC Cutting really easy?

I developed a device for cutting the TLC plates. This is my new invention and this design is registered. I wish to commercialize this product. Please let me know if it is useful for daily...

12 March 2018 4,598 14 View

What is the significance of Rf value of organic compounds in medicinal chemistry ?

Rf values (TLC and HPLC) are used to identify the drug molecules. However this information can be of great value in medicinal chemistry and drug discovery. I think there's a great correction...

30 December 2017 8,826 11 View

How to get user manual or tutorial video of ATOM, JTEX and VPSC7?

I'm working on severe plastic deformation of face centered cubic materials and require these software's user manual for texture analysis.

13 December 2017 4,528 3 View

Continuum shell elements SC6R and SC8R are based on a first-order shear deformation theory? as per ABAQUS User Guide?

Please suggest regarding use of "Continuum shell elements SC8R", for analysis of laminated composite plates subject to Thermal gradient loading. i'm trying to simulate this problem and interested...

26 April 2017 4,747 1 View

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05 April 2017 7,212 2 View

Why lattice parameter first increase then decrease in case of doping Cu in zinc iron ferrite ?

I am working on spinnel ferrite synthesis by hydrothermal and Sol gel route method

27 March 2017 6,497 3 View

What is the standard procedure for Reverse Phase column chromatography?

12 March 2017 193 12 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

Do I need to strip the PVDF membrane before staining it with colloidal gold?

Dear Colleagues, After running Western blot on PVDF membrane and detection using ECL, I would like to stain my PVDF with colloidal gold to be able to allign the ECL image with total proteins on...

02 March 2021 7,829 3 View

How can you bring two structures together to create an adhesive bond in LAMMPS?

I have created an Ice 1h crystalline structure and an Aluminium substrate structure and equilibrated both at 250K. Now I need to bring them together in a way that an adhesive bond is created....

01 March 2021 3,325 2 View

Why there are two peaks while using the mie plot of Silver nanoparticle?

Hi, I am trying to learn the theoretical modelling of silver nanoparticle using the Mie scattering theory. After that, I discovered a software named Mieplot developed by Philip Laven, where it...

25 February 2021 7,493 6 View

I am looking for a simple software program to model 3D chemical bonds. The purpose is to generate high-quality graphical abstracts. Any suggestion?

Hello everyone: I am looking for a simple software program to model chemical bonds. The purpose is to generate a high-quality graphical abstract for a top leading journal in the field of...

23 February 2021 8,012 3 View

How to interpret this FTIR spectrum of pyrolyzed hydrochar?

20 February 2021 2,840 3 View

What are the potential shell well and atomic solvation parameters for the boron atom?

I have a protein-ligand docking project. The ligand contains boron atoms that are not detected by Autodock software. To solve this problem, it is necessary to introduce the boron atom to...

19 February 2021 1,236 1 View

What is error #2070 in gaussian.how we do resolve it?

We want to ONIOM calculation in gaussian16. However, gaussian doesn't work. What should we do? Atom 15 layer R linked to atom 85 is also bonded to atom 161 in layer M bad...

15 February 2021 7,766 3 View

Which kind of validity should e established in case we want to conduct a survey using newly developed survey questionnaire?

I am conducting a survey using self developed questionnaire. I have established its face validity and content validity. Some expert reviewer has suggested I must establish the validity by...

11 February 2021 2,077 3 View

How to Remove different version of atom from pdb Crystal Structure for Docking Preparation?

I am new to Docking and MD, and currently try to catch on it. I try one of the webserver for docking, but unfortunately not working. it says " Your PDB contains multiple forms of the same residue...

08 February 2021 7,426 3 View