How can we extract a small volume of dodecane (2ml) to be analysed using a gas chromatography device?

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Best way to reduce RT in GC while keeping good resolution?

I faced this question in one exam, What is the correct way to reduce Retention time in GC while keeping good resolution: 1- Using temperature gradient 2- Using Isothermal temp. program 3-...

20 April 2024 5,790 1 View

Which techniques that researchers and practitioners would used to understand the impacts and effectiveness of sustainable tourism practices?

In the context of sustainable tourism practices, several sampling techniques are used to gather data and information. These techniques help researchers and practitioners understand the impacts and...

20 October 2023 162 1 View

What is the difference between reverse transfection “neofection” using siPORT™ NeoFX Transfection Agent and standard transfection?

What is the difference between reverse transfection “neofection” using siPORT™ NeoFX Transfection Agent and standard transfection? Can we use any of them for MicroRNA transfection in human cell line ?

29 March 2023 2,335 2 View

Experimental group vs control group?

I need to conduct an experimental group for pregnant women. I divided participants into two groups: Group one perform breathing exercises in two positions. Group two performs breathing exercises...

16 January 2023 5,388 1 View

How convert string to numeric in a dataset?

I have a dataset (Excel file /Size1.4GB ) that have 8 sheets each one having 900,000 rows. I want to convert string to numeric. Moreover, normalization and scaling too.

16 November 2021 7,010 5 View

Why doesn't settlement change with increased geogrid reinforcement on Plaxis 2D?

I am modelling a simple 3-m height road embankment, with varying number of geogrid reinforcement. But the settlement values I get from no geogrid scenario, and the case with geogrid is the same....

05 October 2021 5,754 2 View

What criteria should be used in adopting a proper model for analyzing data in translation?

As far as translation is concerned, how can a translator choose a suitable model for analyzing the data he/ she has collected in order to get the best results? does he/she depend, for example, on...

31 March 2021 5,133 8 View

How to connect biomass with solar cells in the Homer Pro program?

How to connect biomass with solar cells in the Homer Pro program

28 March 2021 988 3 View

How much Frequent of Pulmonary Embolism in patients with Behcet Syndrome ?

Behcet Syndrome is an uncommon disease with an unknown etiology. it is more frequent in the Mediterranean, Middle East, and the Far East regions. there are rare reported PE cases in patients with BS.

27 July 2020 1,931 0 View

What is this EEG noise artifact (mouse skull screw EEG)?

I recently started running in-vivo electrophysiology experiments in mice, and unfortunately many of my recordings have been plagued by a persistent noise artifact which I cannot seem to get rid of...

26 March 2019 7,433 3 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