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

No title

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

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

How to calculate BREQ 3 questionnaire?

how to calculate BEHAVIOURAL REGULATION IN EXERCISE QUESTIONNAIRE BREQ 3 ,which contain 24 questions and each question has 5 answers (0- Strongly disagree , 1-disagree, 2- Neither agree nor...

02 March 2021 811 3 View

I am interested in medicinal chemistry field, which books are highly recommended to learn from?

I am at the beginner level in drug design and drug discovery, and I am interested to learn more about this field. Which books are highly recommended to start from and gives me all essential...

02 March 2021 8,437 2 View

Please suggest a good text book for "Research Methodology in Life Sciences". Which book would be good for PhD Scholars?

Please provide Book Title and author name

02 March 2021 9,059 3 View