1H NMR of alkoxides in CD2Cl2?

Hello! I am planning to get an alkoxide which should be potentially soluble in CH2Cl2. Do you think it is okay to use CD2Cl2 to get an NMR spectrum of the alkoxide? I am wondering if RO- anion...

25 November 2020 1,819 1 View

Arrays in VBA errors?

Colleagues, I wrote a function in VBA to calculate the values of a two-dimensional array. The principle of operation (I want to) is as follows: 1. The values entered were read and written in a...

09 June 2020 7,690 3 View

How can I use Kramers-Kronig rel. to reflectance spectrum to receive the absorbance spectrum?

Hello everyone! I'm in trouble now. I've faced a problem that I can't solve. I need to receive the absorbance spectrum from the reflectance spectrum using KK in matlab, and I'm having some...

19 February 2020 6,154 3 View

Any literature on Pakistani military ideology?

Dear colleagues! Could you name some useful articles and / or books on the ideological and political development of the Pakistani armed forces, especially on the role of India in the process ? How...

25 January 2020 3,423 3 View

Help with VBA code for Gauss elimination?

Colleagues, I wrote VBA code for function of Gauss elimination (in attached files). But I can't launch this function in Excel. I can't find it by her name in line for function's input. Could...

19 January 2020 5,155 5 View

Is there any authomatic devise or method to measure a resistance from temperature dependence in semiconductors (VO2)?

For now, the method we use to measure resistance from temperature dependence in vanadium dioxide (VO2) is really slow: you need to look at oscilloscope and thermometer and write down the numbers...

28 June 2019 4,107 3 View

Any books on the cartography of the British Empire?

Dear colleagues! Would you kindly name books or maybe articles on the history of the cartography of the British Empire and / or spatial perceptions in it? How the British created maps of their...

06 March 2018 7,662 3 View

Does anyone have primers for m2rtTA for mice genotyping?

I need a sequence of primers pair for mice genotyping, thank you.

28 March 2015 766 2 View

Protocol for micro chromatin Immunoprecipitation?

29 November 2014 6,051 2 View

What is the correct boundary condition at an impermeable wall for porous media flow?

The most common condition I have seen is vanishing of normal component of fluid velocity at the wall. It makes sense, because Darcy's law describes pore-averaged flow, and the fluid moves even...

30 November 2013 823 8 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

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 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

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

Looking for Materials with high thermal expansion coefficient and high temperature resistance?

03 March 2021 8,272 1 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 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