my method has been used so long that two of my peaks are noe coeluting.
Dear Professor Ekeberg,
I need to see the chromatogram and read your present temperature program before I can suggest anything. Can you provide them?
Hi, I am trying to fit growth functions on several levels of a fish population (global, by habitat, by size at maturation) by non-linear mixed effects models (since the age/length data originates...
24 September 2019 7,380 2 View
is the bigger LRI (Linear retention index) or RI (retention index) means bigger concentration or peak area or percentage of peak area for GC MS measurements?
16 June 2017 3,071 5 View
I need urgent help in data collecting for my research in educational leadership to identify student leadership perception of teachers at schools. The measurement tool can be quantitive or...
12 May 2015 8,067 3 View
For bone marrow trephines we use a glutaraldehyd fixative, which for internal reasons is imperative. Decalcification in EDTA has been changes from overnight at 35°C to a stirred bath at 45°C, but...
08 February 2015 8,850 10 View
I was wondering if, due to high imbalance with dosages in long term illnesses of adrenal gland(like Primal Adrenal deficiency) and broad spectrum of side effects (especially hydrocortisone)...
26 November 2014 7,337 4 View
I need to do pairwise alignment of nucleotide sequences of length 15-200 nt. Preferably, it should be written in C and accept *char variables for the sequences.
26 June 2013 5,853 3 View
We work with lipids in milk and usually I prefer using SPE. Can you recommend other methods to isolate (preparative) monoglycreides from diglycerides and from triglycerides?
01 January 2013 5,765 5 View
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 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
Hello experts, Does anyone know any free software about retention index prediction ?
08 August 2024 7,403 2 View
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
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
Program: g_mmpbsa, version 2024.1 Source file: extrn_apbs.cxx (line 152) Fatal error: Failed to execute command: $APBS pybYcUWA.in --output-file=pybYcUW.out
07 August 2024 6,066 0 View
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
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
Hello, Can anyone provide me with the absorption coefficient of methane gas at 7.7 um? Any reference?
06 August 2024 980 5 View
I am planning to collect human fecal samples for metatranscriptomic analysis using MGI. These samples are from indigenous people living in a region with high temperatures. I will have access to a...
06 August 2024 1,367 3 View