Is anyone interested in GC/MS system co operation ?

More Mamoun S.M. Abd El-Kareem's questions See All

How can I prepare 300mg/L concentration of lead(II) nitrate ( Mol. Wt reffered is 331.21) incoorporated Luria-Bertani (LB) agar ?

I need to check the Heavy metal (lead) consumption assay using microbes at varying concentration in same media. ( 200mg/L to 2000mg/L).kindly help me to clear it.

19 January 2021 1,946 9 View

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Is it possible to activate these models with the presence of e-learning at the present time or are they somewhat difficult to implement?

29 December 2020 1,076 12 View

Is THC causing underlying paranoia in individuals?

In other words, is there a chemical impact caused by THC which could be activating neural correlates in the insular cortex (ic) of the brain? The increase in the sensory activating...

04 August 2020 967 4 View

Will genetic characteristics of bacterial isolate have stored for long time can change such as plasmid loss?

I hope get answers with evidence

02 May 2020 707 46 View

What methods should be used for analyzing PCR amplification products?

What method(s) should be used for analyzing PCR amplification products?

27 April 2020 7,499 8 View

What is the best in the genetic modification of plants, plant cell or chloroplasts and why?

cloning endotoxin gene in chloroplast

24 January 2019 8,093 3 View

Is it possible to write the ANN model equation based on the resulted weights?

Artificial neural network model

17 December 2018 598 5 View

Why 3-aminopropyltriethoxysilane coating of glass surfaces with water ?

05 July 2018 7,593 3 View

How to choose the k-point sampling and the planewaves energy cutoff ?

Should I fix the k-point density and then increase the energy cutoff in steps until convergence, or should I fix the energy cutoff and then increase the k-point density in steps?

16 June 2018 5,463 5 View

What are the most famous plant extracts used in green synthesis of nanoparticles ?

06 June 2018 8,760 12 View

Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View

How optimize the Size Exclusion Chromatography?

Hello! I'll do a size exclusion chromatography, but I only have an open column, and I'll perform the peptide extraction from yeast, using buffer lysis (sodium phosphate 50 mM/NaCl 30 mM/DNAse and...

01 March 2021 2,215 2 View

Do anyone here can help us in the field of molecular docking?

We have synthesized various metal complexes with different environment around the metals. Now to see the application of synthesized complexes we need this study also. we are also interested in...

01 March 2021 1,899 2 View

Precipitate after adding laemmli buffer to protein solution containing Potassium Acetate?

Hi, I am running a size exclusion chromatography experiment with a buffer containing Potassium Acetate as a salt. I analyse these fractions through SDS-PAGE. After boiling my SEC fractions in...

01 March 2021 2,622 3 View

Any research papers for extraction of nutrient deprivation on macroalgae? Analysed by HPLC-UV and GC/MS. Possibly from macroalgae genus Rhizoclonium?

I am doing my thesis on the nutrient deprivation on the macroalgae Rhizoclonium sp. I will be analysing the levels over a period of roughly 5 days by HPLC-UV and GC/MS. I will be using seawater as...

28 February 2021 6,477 1 View

Necessary tube lenght to cool Natural gas in a dry-ice cooling bath?

I have a tank which contains natural gas at 250 Bar and 293 Kelvin. I want to cool the gas in a dry-ice cooling bath to about 195 Kelvin. The gas will flow in a copper-tube through the bath with a...

27 February 2021 8,128 1 View

Exit velocity of natural gas from pressurized tank?

Hi Guys. I'm a mechanical engineer and have a bit trouble, would be very glad if you could help me with my questions. I have a pressurized tank which contains Natural Gas at 200 Bar and 293...

26 February 2021 6,253 3 View

Gas sensor response and recovery time independant of flow rate and chamber volume?

I am trying to obtain the response and recovery times for my gas sensor device. It appears the the response/recovery times are primarily dependant on the flow rate of the gas I inject into the...

26 February 2021 1,511 3 View

Why do a weight decrease for thermal degradation in nitrogen gas condition?

Hi all The question is related to TGA(Thermogravimetric analysis). Thermal degradation easily understood but why do samples weight decrease? altough just binding is broked, the weight of...

26 February 2021 1,100 5 View

Why do the air flow results vary totally when adding scalar in CFD ?

Dear All, We are using Autodesk cfd to calculate the air flow in a single sided naturally ventilated room, where air flow depends only on buoyancy due to temperature difference between inside and...

25 February 2021 9,602 4 View

Praveen Roylawar

Dear Sir

i'm totally new to gc-ms,lc-ms,hplc etc. i have my sample (infected tomato leaves) which i would like to analyze for phytohormone content like SA, JA,and ABA. I will very happy if you please guide me for sample preparation (extraction) for analysisng this phytohormone.

Mitesh Gor

I have different crude oil samples will u help me to sample preparation and analysis.