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Efficiency scores greater than 1 ?

To calculate the allocative efficiency of an agricultural crop using the SFA model, I obtained efficiency scores greater than 1. I'm wondering if this is normal. Pour calculer l'efficacité...

13 May 2024 2,764 1 View

Is the accuracy of EM and ML algorithms are different?

For estimating parameters of mixture densities, EM (Expected maximization) algorithm is used frequently. EM algorithm helps to get ride of dealing with complex likelihood function. What will be...

21 February 2024 2,671 1 View

NTC contamination in real time PCR with sybergreen?

Hi, I have NTC contamination in real-time PCR. I checked all suspicious items such as primers, master mix, and distilled water, and also the workspace. but unfortunately, I can not remove the...

27 May 2023 7,823 6 View

How do you show Van der waals interactions between a drug and its target on PyMol?

i am trying to show the van der waals interactions between a drug and its active site in pymol. i am able to display polar interactions such as hydrogen bonds, how ever i do not know how to...

03 March 2023 5,971 1 View

Pymol error in displaying interactions ?

Hi, i am trying to display an interaction between a drug and its active site on pymol. i have saved the coordinate file for the most favourable confirmation from Autodock. i then go into pymol...

21 February 2023 4,206 3 View

Optimising an organic molecule on Avogadro software, without changing the stereochemistry?

I am trying to optimise an organic molecule using Avogadro software, and when I draw the molecule according to the correct sterochemistry (some bonds coming towards the screen and some going away...

30 January 2023 9,773 3 View

Retrosynthetic analysis diagram ?

The m

14 January 2023 8,205 2 View

Which option is faster?

If I want to synthesize the product shown in the image, would it be faster to use option A as the starting material or option B. My goal is to synthesize the product in the space of 4-5 hours,...

01 January 2023 6,810 2 View

fjsjfajkha jkfkjafjhkjafj fasfafaf asfa afaf ?

asfasfczcz zczczc fsfjkzmnjhsuas asfaihfa asafafa asfafa

26 December 2022 3,841 9 View

How to classify dataset when number of features is different?

I calibrated a model to my dataset and I want to use parameters of this model as features. This model have parameter alpha that is periodic so for signal with period 'S' I will have alpha_1,...

08 December 2021 298 4 View

• What the possible Persistent Organic Pollutants and Heavy metals present in fluorspar, sediments, and water bodies around its mining area?

Approximate concentrations are require in compared with the WHO permissible limts

11 August 2024 2,723 1 View

Basis set and input instruction to calculate HOMO and LUMO using Orca for Imidazolium based organic salts?

Hey there, As a synthetic chemist delving into theoretical calculations for my imidazolium-based organic molecules, I would greatly appreciate any guidance on the appropriate input instructions...

09 August 2024 5,444 7 View

How to calculate CCS for Sodiated adduct ions and Multiply Charged Ions?

I'm currently working on calculating the collision cross section (CCS) for various ions, and I'm facing challenges when dealing with sodiated and multiply charged ions. Most of the resources I’ve...

08 August 2024 8,329 0 View

Separation of organic acids-HPLC?

Hello What should be done to separate and identify organic acids in HPC when their RetTime is the same?Like oxalic acid with Propanoic Acid.or acids that have a very close RetTime.

07 August 2024 8,782 3 View

How to convert g/kg Humic acid dose to kg/ha?

I used humic acid at 0.044 g/kg soil in my pot experiment. But finally, I have to recommend kg/ha. Each pot's soil weight was 11 kg. What is the solution?

02 August 2024 7,186 6 View

How to improve peaks separation in HPLC?

Hi everyone, I'd like to better separate two close peaks coming from a bioconversion sample, I'm currently using a C18 KromaPhase 4,6mm Ø.I. SCHARLAU, particle size (µm): 10, pore size (Å): 100,...

30 July 2024 435 3 View

Inquiry on Maximum Nucleic Acid Volume for 2.5 mL Liposome Solution?

I am currently working on a project involving liposomes and need to determine the maximum volume of siRNA that can be added to a 2.5 mL liposome solution with a total lipid concentration of 10...

30 July 2024 6,420 1 View

How can I use DFT-D3 correction ( Siesta version 5.0.1)?

Dear Siesta Users, I installed Siesta 5.0.1 and I want to use Grimme's D3 correction. According to the 5.0.1 manual, I could use a few parameters to include the D3 correction in the...

27 July 2024 5,748 0 View

EDC carbodiimide and NHS easter 's half life among different pH?

It has been long known that EDC carbodiimide and NHS easter's half life agains hydrolysis are highly related to pH. However, very surprisingly, not yet found a paper giving a table/chart of their...

25 July 2024 8,738 0 View

Mechanochemistry: ball to powder mass or ball to powder volume?

I run mechanochemical reactions that involves the use of a large amount of catalyst (1:1 molar ratio to the reactant). When I try to understand the effect of amount of catalyst on the reaction, I...

23 July 2024 9,938 1 View