CaCO3 in mass specra in positive mode?

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Impact of Climate Change on the Spread of Zoonotic Diseases in Subtropical Zones?

I have a few questions regarding that topic: 1. What technologies, both existing and in development, can enhance early detection or improve monitoring of disease spread? 2. What are all the...

06 March 2024 1,154 3 View

What environmental impacts may result from administering feed additives to cows in efforts to reduce gas emissions?

And are there any ethical concerns associated with this approach?

12 February 2024 7,555 0 View

What are the pros and cons of mariculture compared to livestock farming in terms of greenhouse gas emissions and economics?

Which option is most suitable when considering factors such as gas emissions, environmental consequences, and economic implications?

12 February 2024 7,864 3 View

What is the land in plastic extrusion die?

how long should the land in a plastic cable extrusion die should be?

12 December 2023 2,281 1 View

What are the best conditions to detect citrate in LC-MS?

I am trying to detect citrate in LC-MS. I ran the samples in both negative and positive modes. I performed direct injection (without a column) using an ESI ionization source. Thank you very much

16 May 2023 7,834 4 View

What are the best conditions for MS when trying to detect molecules+sugar?

I am trying to detect molecules that are connected with sugar. The device is HRMS with ESI and APCI ionization source, but none can do the job. Is it possible only with MALDI? or are there...

20 February 2023 1,348 6 View

How to measure/estimate media pH inside the incubator?

I am having an issue with measuring the pH of my media. I use D-MEM/F12 media (without buffer) and try to adjust it to pH = 7.4. Since I incubate it @ 37C / 5% CO2, I added 2.5 g/L of NaHCO3...

18 January 2021 4,106 1 View

Tips for collection of bovine umbilical cord?

We're interested in isolating MSCs from bovine umbilical cord (UC). We were wondering about these issues: 1. Most births occur at night, and we will probably be able to do the collection at the...

22 December 2019 1,317 0 View

Lactobacillus Reuteri minimal media?

As part of a research i am conducting i plan to analyze how different carbon sources in the growth media of L. reuteri effect the properties of the Supernatant derived from anaerobic growth. My...

15 June 2019 422 2 View

Does anyone have suggestions on how to grow Lactobacillus Reuteri in anaerobic conditions in order to harvest the liquid of fermentation products?

I'm looking specifically for the growth conditions i.e. on what substrate to grow the bacteria (preferably something that mimics a high fiber diet), for how long to grow in order to induce...

18 March 2019 8,357 3 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 8,140 3 View

GC-MS retention index prediticon?

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

08 August 2024 7,402 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 8,328 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

What is the prepared reference material that can be used in inductively coupled plasma optical emission spectrometry (ICP-OES) to measure REE and U ?

What is the prepared reference material that can be used in the ICPE-9820 Shimadzu Japan instrument, which employs inductively coupled plasma optical emission spectrometry (ICP-OES) to measure...

06 August 2024 1,896 1 View

RNA later for the preservation of RNA in fecal samples at room temperature for one day (37°C)?

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 1,365 3 View

How can major oxides determined by ICP-MS/ES be normalized to 100% volatile free? How does this connect with LOI?

I am analyzing cherts from different sources found within one specific geologic formation using ICP-MS/ES. My committee was asking this question about my analysis. I was not sure how to answer this

05 August 2024 7,902 3 View

Usage of internal standards in LC-MS/MS analysis?

Have you ever seen a LC-MS/MS method uses both internal standards and external standards (in matrix matching purpose) but the concentrations of internal standards are outside the calibration curve...

05 August 2024 3,082 6 View

Could dyes amplify the spectrum of light to a specific wavelength?

I am interested to know the behavior of dyes toward light. Specifically, Blue dyes re-emit the spectrum, especially from the green zone (known as principal in LED lamps, and blue dyes are known...

05 August 2024 3,289 1 View

Hello dear researchers. I would like to know what is a normalized mass in an EDX analysis?

EDX analisys

31 July 2024 5,946 2 View