Hello all, I once read in some paper that addition of tetrahydrofuran(THF) increases sharpness of peak. Can I add THF to methanol gradient for PAHs separation?
how to take sample from unknown population? which research design and sampling method is recommended?
13 December 2023 4,316 3 View
Good day, all, What are the possible reasons for a decrease in the quantity of nitrogen adsorbed during BET analysis for 2 different samples?
08 October 2023 8,681 0 View
Flourescent material
11 July 2023 3,865 1 View
I need a relevant literature for the above question. Thanks.
30 June 2023 5,138 0 View
I have my data in excel. I want to determine the sources of the polycyclic aromatic hydrocarbons PAHs I analysed. Can somebody put me through step by step, please?
13 June 2021 9,595 5 View
Engine oil extraction from contaminated soil,10kg of contaminated soil+20ml of dicholoromethane+? of anhydrous sulphate
01 February 2021 9,807 1 View
Researching into Knowledge Management adoption and implementation frameworks in AEC for a developing economy and have been running short of gaps relating to cost management of infrastructure...
11 January 2020 8,938 3 View
How do you measure the performance/utilization of a healthcare department/clinic? What methods/approaches/techniques/tools do you use or suggest? You have to consider the human factor. The...
18 December 2019 2,051 9 View
We already now that while changing the duty cycle of DC/DC converter in order to track the MPP, the output voltage of the converter is going to be changed as well. So, the output voltage...
06 October 2019 9,001 5 View
I know there are double resonance experiments, mostly based on either photodissociation and fluorescence which are quite expensive. But I wonder if it is possible to do similar experiments in the...
22 January 2019 7,100 3 View
Do these peaks in the curve indicate primer dimer or non-specific products?
01 August 2024 7,466 0 View
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
Kindly share a research paper that explains the effect of Methanol and ethanol treatment on collagen based scaffolds. How it increases porosity and swelling. Kindly help me find a paper. Thank you
24 July 2024 3,937 0 View
In cases where the rotational of the magnetic field H is zero, we can define this field as the gradient of a scalar function defined as the magnetic scalar potential (similar to the electric...
21 July 2024 9,633 4 View
I do not know much about FTIR! The material Benzethonium Chloride USP was compared to a reference standard in regards to FTIR, as per the USP testing: Identification B. Infrared absorption (FTIR),...
16 July 2024 6,918 7 View
im studing gaussian 16 with reading paper about I-131 Metaiodobenzylguanidine in the paper "In a similar vein, nuclear magnetic resonance shielding values were investigated using the widely...
16 July 2024 6,040 4 View
I am searching for HPLC method to estimate Mirtazapine but i want to avoid HPLC-buffers as a mobile phase component. So, I am looking for alternative HPLC-solvent (acetonitrile, methanol etc.)...
14 July 2024 1,493 3 View
Where is the stream gradient usually greatest and relationship between the slope of the stream channel and the velocity of the stream?
13 July 2024 5,825 0 View
How do gradient and discharge change in a downstream direction and why are glacial valleys shaped differently from river valleys?
13 July 2024 9,228 3 View
What happens to the stream's discharge if the gradient of a stream increases and relationship between the gradient of a stream and the rate of water flow?
13 July 2024 5,085 2 View