What is the procedure for determining the CFV in a bench-scale Forward Osmosis setup? This is my first time using the equipment. Should I initially calculate the mass change between the DS and FS over time to obtain the flow rate at 0 bar pressure?
Hi all, I made synthetic wastewater samples and I was wondering if the integrity of the ions might change if stored for long time outside the fridge before analysis. Say foe example, I prepare...
09 June 2024 2,706 0 View
I want to use this buffer in urine for NMR analysis
11 November 2023 5,721 1 View
Which anions from multi-elemental standard solution will elutes first in anion exchange chromatography?
12 September 2023 1,398 1 View
Which anions elutes first in anion exchange chromatography?
10 September 2023 9,510 1 View
which concentration between 2% and 5% nutric acid is better to use to prepare for ICP-OES standard solutions ? I have multi-elemental solution, I want to make a standard solution for calibration...
24 August 2023 1,576 0 View
Can I determine the cross-flow velocity in FO with pure water as a draw and feed solution? This is my first time working with a Forward Osmosis membrane, we dont have flow meter attached in the...
28 May 2023 6,325 0 View
Considering the density, how do I prepare a 1% nitric acid solution from 70% nitric acid to dilute my unknown concentrated sample (1ml) for ICP-OES. How much volume is required from 1% to dilute...
17 May 2023 585 0 View
how many times do I dilute my concentrated samples before ICP-OES analysis? For example, do I use 2% nitric acid for the dilution of my wastewater samples? and how many times?
03 May 2023 7,657 0 View
Do I have to dilute my urine samples with nitric acid before I analyse them in ICP-OES?
03 May 2023 5,901 0 View
What exactly is the 'initial water flux' in membrane systems and how do adjust it if for e.g I want the initial water flux of FO and RO to be the same
01 May 2023 793 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 have been getting a low plasma and no coating while doing rf sputtering of copper doped ZnS using a power of 140 watts and at pressure of 6.5x10-3 Mb.
07 August 2024 4,526 4 View
Hello, I suspect that a molecule I am using is causing bacteria to experience osmotic shock. What chemical properties should I look for to compare this capability with those of other substances?...
06 August 2024 977 1 View
I want to perform a CRISPRa/i library screening for candidate regulatory factors that affect pathogenic Th17 differentiation in PBMC. But I am wondering how to define the size of gene library, so...
31 July 2024 2,150 0 View
EDX analisys
31 July 2024 5,947 2 View
I am working on algal extract to which gas chromatography (Not GC-MS) spectrum I want to discover. My question is can we identify specific compounds using retention time if I compared the RT with...
29 July 2024 8,034 4 View
I have been running a MAGeCK test command on the terminal for a CRISPR screen to rank sgRNAs and genes based on the read count tables. However, I get only the plot of the top-ranked genes...
28 July 2024 9,811 1 View
if you have MRS broth already prepared, what is the manner you will follow for preparing hyper-sweet medium for screening of EPS producer LAB? what the concentration of saccharose or glucose you...
26 July 2024 6,606 0 View