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18 November 2020 9,422 1 View

Why am I seeing a fluctuating GCMS baseline/ baseline noise?

I am working with a 7820A GC and 5977B MS. Recently, we changed the helium tank and since then we have been seeing baseline noise in the chromatogram which is high enough to interfere with my...

11 November 2020 6,520 2 View

What can these peaks in PL corresponds to ?

In Zno (pristine and doped) kindly help in the analysis of these PL results at exc. 510 and 380

26 May 2020 7,393 7 View

What can be the reason of getting a negative slope in W-H plot for my synthesised nano material ?

I got negative slope (W-H plot) in my synthesised nanomaterial and on doping that same material , I got negative slope again but it's value decreased . What can I conclude from it .

01 May 2020 2,230 10 View

How to increase the yield of extracellular DNA in extraction process from water samples?

I am using 1% CTAB for extracellular DNA extraction, followed by isopropanol precipitation, phenol chloroform extraction, ethanol precipitation and wash. How can I increase my yield?

02 March 2020 7,947 3 View

For studying electrocatalytic behaviour of a nanocomposite what should I do?

I have prepared MgO nanocomposite in powder form . I want to check its electrocatalytic properties but I have no expertise in making electrodes as it is also not my guide's field. Is there any...

10 December 2019 10,027 3 View

What are the possible effects of the laser incidence angle on the sample(tissue)? Can it reduce scattering?

I am trying to build an optical tomography sytem and generate a SHG. I was wondering if changing my laser incidence angle on my sample can reduce scattering by a bit? Or is it best to keep the...

19 November 2019 7,829 4 View

Why absorbance is increasing on adding doped semiconductor NP?

I hve prepared a Doped Zno with diff conc. For photodegradation of a phenolic pollutant I got absorbance value higher. Is it mean that it can't be used for it or I should try something else

04 November 2019 3,506 4 View

What is the standard procedure to purify gallic acid from fermented sample?

I have carried out the solid state fermentation of organic substrate using Aspergillus niger.I want to purify gallic acid from it.Can anyone suggest me simplest method to do it with references.

18 June 2019 8,156 3 View

Which type of phenol has retention time between 10.91 minutes?

I have analyzed my sample using LC-Ms. The sample was fermented organic waste sample. Aspergillus niger was the microorganism used.

10 June 2019 9,710 4 View

Looking for Materials with high thermal expansion coefficient and high temperature resistance?

03 March 2021 8,272 1 View

What are anisotropic electrical and optical properties of a semiconductor due to?

In some materials, properties such as band gap, thermal conductivity differ along different crystallographic axes. What are the basics?

01 March 2021 1,923 3 View

How to define and get results (stresses) for certain points of a model in abaqus, using python? When the size of the model changes?

I want to do a parameter study of a aixsymmetric cylinder in Abaqus. I want to create several jobs where I get the stresses for 3 different points in my model. These points are defined. I wrote a...

01 March 2021 10,078 1 View

LOAD DISPLACEMENT CURVES Stiffness increasing in ANSYS non linear analysis. HOW CAN I CORRECT IT?

Hi. I am doing non linear FE analysis using a new material beam under flexural 2 point loading using ANSYS. I have defined a bilinear material model. The solution has converged. In results I am...

01 March 2021 9,911 3 View

Joint behaviour in Abaqus is not captured well?

I am working on roof joint and trying to simulate the behaviour in Abaqus. I am successful in running the model but the final graph does not follow the experimental curve in the negative direction...

01 March 2021 6,661 3 View

What are the countries most affected by extreme rainfall as a result of climate change?

Increased heat, drought and insect outbreaks, all associated to climate change, have increased wildfires. Decreasing water supplies, declined agricultural yields, health impacts in cities owing to...

01 March 2021 7,168 9 View

How UAV or drone can be beneficial to better estimate crop yield?

As we know, crop yield estimation has been done traditionally with farmer's expert knowledge, deductive sampling in representative areas, and remote sensing with satellite imagery. Farmer's Expert...

01 March 2021 3,468 3 View

What is recommended for solid domain in ANSYS FLUENT?

Should I mesh the solid domain ? or should I use wall thickness? or Shell conduction? for Heat Transfer between two fluids of a Heat Exchanger. what is recommended?

01 March 2021 9,785 3 View

Heat exchanger with liquid Nitrogen as coolant?

I want to cool Natural Gas from 195 Kelvin to 138 Klevin in a heat exchanger by using liquid nitrogen as the coolant medium. When entering the heat exchanger, the liquid nitrogen will have a...

01 March 2021 6,450 5 View

How can i resolve the "final solutuin is not converged" error in Comsol for my heat transfer simulation??

I have been trying to simulate heat transfer problem in Comsol 5.5 for long time but it always throw an error stating: "Failed to find a solution. Maximum number of Newton iterations...

28 February 2021 8,626 3 View