How can I use N-Methyl-N-(trimethylsilyl)trifluoroacetamide, suitable for silylation?

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I have a question about Adam's Fusion. it's always performed using NaNO3, which can be a good alternative to NaNO3?

I need to a salt without any nitrogen in it

15 May 2024 6,684 1 View

PAST: why the sofware cuts the taxa names in multivariate clustering Classic Clustering?

Dear colleagues, I am faced with a problem that is as stupid as it is annoying. Processing a data matrix in PAST4, when I run a multivariate clustering survey, and in this case Classic clustering,...

16 February 2024 2,345 0 View

Measurement instruments to detect solitude in young adults?

Are there measurement instruments to detect solitude (i.e., positive valence of solitary experience) in young adults?

01 February 2023 1,834 0 View

Clustering qualitative data: which method is best?

I have a morphological characters quantitative/qualitative data matrix. The quantitative data can be easily dealt with with NJ clustering, but what about the qualitative data, where no distance...

11 December 2022 6,303 3 View

Has anyone had issues with the quantification of DNA and RNA after treatment of 5-aza-2'-deoxycytidine?

I'm treating a cell culture with 5-aza-2'-deoxycytidine to evaluate the effect of demethylation in gene expression. I've extracted the RNA and DNA and when measuring the quantity and the quality...

04 April 2022 8,307 1 View

Chemical equilibrium calculation issue?

Hi everybody: i need your help to solve this issue about chemical equilibrium calculation On this case my available datas are Volume: 1 L Temp: 25°C Reaction (already balanced) --> N2 (g) +...

29 November 2021 1,771 3 View

KOH: how to increase the etch rate of a specific crystal plane?

I'm using KOH to etch silicon, unfortunately I see that under a certain etch depth (less than about 250nm) the flanks does not look good because the etch rate is slower compared to the 100 plane...

07 February 2021 1,921 17 View

Terrestrial Manganese Mineralization deposit formation?

I've started a thesis(bachelor) on a Mn mine in Poggio S.Vicino(IT), i went for some field researches and to collect minerals in situ(Mn oxides) usually found as Coatings on other minerals such as...

04 January 2021 1,201 2 View

Does anyone know if there are any papers on Surface reconsturction of gold and platinum ?

I've found this Science paper about Au reconstruction: https://science.sciencemag.org/content/sci/255/5050/1416.full.pdf I need to know if there is a study how compare Pt and Au or anyway, if...

17 November 2020 8,880 0 View

Which questionnaire/scale should I use to "measure the effects" of socioemotional development influenced by an intervention in a highschool?

Requirements for the questionnaire/scale, it shoud: "measure" socioemotional learning (see definition of SEL here: https://casel.org/overview-sel/ ); possibly fit a pre-, mid- and post test...

20 October 2020 774 3 View

Which type of compound does lamda max of 218 indicate in a uv-vis spectrum of a partially purified compound through column and TLC?

A crude extract of fungal culture using EtOH was subjected to column and TLC and partially purified compound was obtained. UV vis spectrum of the compound/s has max absorbance at 218nm. The...

11 August 2024 9,801 2 View

Can you connect an HPLC to a Mass Spec only at a certain time point?

Can anyone explain this method? Especially the last statement where it says only at 1.5 to 2.5mins was the MS/MS connected to the UPLC. How is that possible, is it a feature in this specific...

11 August 2024 8,141 3 View

GC-MS retention index prediticon?

Hello experts, Does anyone know any free software about retention index prediction ?

08 August 2024 7,403 2 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

Can I use a HisTRAP column for affinity chromatography?

I'm working on selecting antibodies against a recombinant protein that has a His-tag. My idea is to first bind the recombinant protein to a HisTRAP column and then use this column for an affinity...

07 August 2024 505 3 View

AUX gas reading problem on QE with full MS and PRM method in one run?

Dear QE-users, In the method where full MS positive mode and PRM mode are used, we always get an incorrect auxiliary gas reading (41 instead of 25). This only happens in this method; other...

06 August 2024 4,953 0 View

Absorption coefficient of methane?

Hello, Can anyone provide me with the absorption coefficient of methane gas at 7.7 um? Any reference?

06 August 2024 980 5 View

How can I inoculate a lyophilized anaerobic bacteria into the culture medium without an anaerobic chamber?

There are anaerobic gas pak jars and environment providers in the laboratory that provide anaerobic environmental conditions for the growth of anaerobic bacteria. However, there is no anaerobic...

05 August 2024 4,945 3 View

Why is TLC not a form of partition chromatography?

Why is TLC not a form of partition chromatography and paper chromatography not a form of absorption chromatography?

03 August 2024 7,035 3 View

Is there any Indian Company or Startups, from any universiy or IITS, which manufacture Gas Chromatography instrument , i want to make a custOmized G?

or we can collaborate

01 August 2024 6,705 2 View