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Questions related to Gas

What does a negative value of replication inhibition mean?

Dear all, Would someone please explain to me what does a negative value mean which is obtained during a cell based assay to test an antiviral drug i.e at 1 μM, substance A has RTqPCR replication...

11 January 2021 6,649 3 View

How to estimate or calculate the amount of potassium cation that can be exchanged in zeolite based on its CEC and convert to KOH concentration?

meq/g to KOH concentration

09 January 2021 3,176 3 View

Which heating methods do you recommend for establishing a poultry house (oil heater, gas heater, electric heater)?

I think a gas heater is better for the lower operating costs

04 January 2021 533 18 View

Physisorption depends on surface area of adsorbent only while chemisorption depends on surface area and surface charges or functional groups ?

Is my statement or understanding correct? Physisorption includes physical adsorption mechanism in which surface area plays important role. However for chemisorption, the mechanism involve are...

31 December 2020 4,076 5 View

How China is the biggest emitter of CO2 gas in the world?

26 December 2020 6,343 10 View

What is volume of gas sample to be injected into GC for analysis?

I'm currently working on a batch type gas phase photocatalytic reaction. For product analysis, i draw the gas samples from the reactor using a gas tight syringe and then inject directly into the...

23 December 2020 6,988 2 View

How to normalise the outlet concentration to the feed concentration for CO2/N2 mixed gas breakthrough data?

I have CO2 /N2 breakthrough data but I am finding it difficult to normalise the outlet concentration to the feed concentration. Please tell if there is any standard protocol to normalise the data .

20 December 2020 7,753 0 View

What is the methodology for modal analysis of plutonic rock thin sections?

For IUGS classification(QAPF) modal(volume% ) analysis of the plutonic rock is necessary. In thin section how can it be done?

20 December 2020 1,208 2 View

Design of a membrane system to remove CO2 from a flue gas current?

Hi all, I am trying to design a membrane system to remove the CO2 from a flue gas current, and I am having difficulties in finding information. Does anyone have any technical information,...

16 December 2020 3,864 2 View

Can anyone kindly explain a method to build a device to mix two non-reactive gases to specific ratios?

We are currently working on a project regarding the heat treatment of low-quality gemstones. We need to fill different gas mixtures into the tube furnace. Therefore we seek a method to mix two...

15 December 2020 7,294 3 View

What is the average stove efficiency for household gas stove especially in the Indian subcontinent?

In one paper, I saw it to be about 36%. But as the paper was published in 1997, shouldn't modern household gas stoves be more efficient?

15 December 2020 6,348 6 View

Is there any ingredient I an add into formula to slow down gas generation from Vitamin C?

I know Vitamin C is unstable and tends to be oxidized quickly. The problem here is I made a Vitamin C beverage at pH 4-5, and it starts to generate gas in the packaging, especially at high...

14 December 2020 6,211 1 View

Which is the best fast method for the quantification of soil urease activity in the lab?

I am investigating the ability of certain substances to inhibit the activity of the urease enzyme in soil, so as to reduce the hydrolysis of urea applied as a fertilizer. I am looking for a "fast"...

11 December 2020 8,598 3 View

Why does water vapour entering a non-hermetic electronic package (through a capillary) not reach equilibrium with the outside environment?

I am running an experiment in which I have packaged a moisture sensor in a small ceramic package (1cc) connected to a glass capillary with a leak rate somewhere around 1E-3 atm cc/s. I bake out...

10 December 2020 1,040 0 View

What happens to a gas after compressing it for 10 years?

Will it lose a fraction of its expansion power assuming it was insulated in this system? Because I am designing an insulated gas spring. what I want to know if the gas will lose some of its...

08 December 2020 6,294 3 View

How can i investigate the interaction between gas-rock or gas water rock in phreeqc?

I want to investigate the reaction between a mineral (Calcite) and a gas phase (H2) which has been stored at a depleted gas reservoir. I try to model this by defining a solution and put H2(g) as...

26 November 2020 9,030 1 View

How many and which spin multiplicities we should choose for optimization the adsorption of O2 gas with metal complexes?

I want to optimize the interaction between the the O2 molecule and a metal nanocluster, but I need to know which multiplicities I should choose?

26 November 2020 906 2 View

Does the electrolyte need to be saturated with hydrogen for measuring the hydrogen evolution reaction (HER)?

In most cases of measuring the HER the electrolyte is saturated with H2. Similarly for the OER it is saturated with O2. But I have also seen papers that saturate the electrolyte with N2 or Ar....

19 November 2020 4,692 2 View

Which gas is used for Bunsen burner in ASTM D6413 Vertical Flame Test?

I'm trying to make a Vertical Flame Test apparatus for flammability test of PVC based leather. I'm not sure about the type of gas which is to be used for generating the flame using bunsen burner.

10 November 2020 1,968 1 View

How to measure the CEC of zeolite using Ion chromatography ?

Using ion chromatography ,which concentration I should measure of exchanged ion or original ion? ：Na-A zeolite➡Ca-A Which ion concentration should I measure Na or Ca?

10 November 2020 346 1 View

Quantification of gases with FTIR?

i have quntified the gas sample which contain,H2O, CO2, HF,HCL,CO2,NO2 etc with the help of FTIR Gasmet DX400.. The dilution ratio was 1:10 .Nitrogen was used as a dilution gas. how can I find...

04 November 2020 5,150 2 View

Does anyone have more information on the geomagnetic storm of march 13th, 1989 and it's impact on the electric grid?

Hello, Does anyone have information on that geomagnetic storm and it's impact/influence on MV, HV and/or EHV electricity networks? Input will go to a group of Belgian Experts on HV/EHV networks...

28 October 2020 7,084 3 View

How to test Moisture content of brick that are coated with wax ?

Can i know how to test moisture content on solid bricks if the bricks have coated with wax , to be specific the surface of bricks is coated using paraffin wax and beeswax #bricksurface #brick...

26 October 2020 1,357 3 View

Is it possible to use gas chromatography for the analysis of water contaminated by hydrocarbons?

I am using a gas chromatograph to determine the composition of the petroleum fraction, is there a possibility to do an analysis of water contaminated with alkane rich hydrocarbons?

24 October 2020 10,073 3 View

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