Which transition metal salt precursor is best for doping? Why?

I would like to synthesize a transition metal doped TiO2 via solgel method. Hence, I would like to know which metal salt precursor to choose among Chloride, Nitrate, and Sulphate. A clear...

27 February 2021 4,285 3 View

Sequence of an unknown Oligonucleotide ?

Hi All, I do have a single-stranded oligonucleotide of 100 - 150 bases synthesized and the sequence is not known. How would I proceed to know the sequence .

04 February 2021 5,614 3 View

How to separate solid NHS-folate during the folic acid activation?

Am functionalizing the metal nanoparticle with folic acid. in the process I have taken folic acid in DMSO and added DCC and NHS to activate the carboxylic acid group of folic acid in the standard...

01 February 2021 9,890 3 View

In online GC-FID/TCD connect to flow reactor, why I am getting instable peak area in FID in every injection under same conditions?

We have online GC-FID and GC-TCD (Mod: 2014) connected with flow reactor system. This GC-FID/TCD is connected to a gas line coming from flow reactor system which I used for cascade reaction. In...

11 November 2020 4,999 6 View

Please suggest that the way of obtaining the concentration (in mol) from the gas mixture (N2=98%, Ethylene=1% and Butadiene=1%) is correct or not?

I have a gas mixture (N2=98%, Ethylene=1% and Butadiene=1%). I want to obtained the molar concentration of each components for 1mL volume of the gas mixture. For that purpose, I have used the...

29 September 2020 6,233 1 View

What should be the minimum and maximum dopant concentration to achieve best photocatalytic activity of any semiconductor?

I am working on modifying the band structure of TiO2 semiconductor for visible light photocatalytic activity. For this reason, I would like to dope the metal and/or nonmetal ions into the TiO2 to...

23 September 2020 1,063 6 View

How to calibrate a GC-FID where two of the components are gas phase & others are in liquid phase?

I am new in GC-FID and TCD measurement technique. I will analyze a gas stream at high temperature above 190 oC in the GC-FID system. I want to construct a calibration curve for the mixture of...

08 September 2020 6,073 3 View

Anybody has an experience on the DSSAT 4.7 model ? please let me know?

I am working on the DSSAT model, its a little bit harder than I think please help me?

04 May 2020 5,708 3 View

Why are the COVID-19 infection and mortality rates lower in India?

It is intriguing that the number of reported cases infected or died due to COVID-19 infection in India is comparatively much lower than the United States (US), China and other European countries.

18 April 2020 2,170 22 View

How to convert netcdf file in *.nc4 format to .csv or excel format containing data on planetary boundary layer height?

Monthly average data on Planetary boundary layer height is downloaded from disc.gsfc.nasa.gov. It is in netcdf file in *.nc4 format. How to convert this into .csv or excel format ?

15 December 2019 8,137 3 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

Is there a classification scheme for rock cavities or caverns with respect to their size and shape?

The range of forms and sizes of cavities in rock is very big. Is there a classification scheme for rock cavities regarding their size and shape?

02 March 2021 4,511 3 View

How the wettability of rock sample can be changed by ageing in pure hydrocarbon oils only?

I want to do wettability analysis of hydrocarbon oil (octane)/rock/surfactant solution system. but to do the analysis first I have to make rock surface oil-wet. Since hydrocarbon oil does not have...

27 February 2021 5,383 3 View

Any references about insects or animals that can damage or weathering of rock or fossil material?

Are there any references to insects or animals that can cause damage or weathering to the rock or fossil material? books or paper that would be nice. Thank you very much!

24 February 2021 6,805 3 View

Physical-chemical formation of stalactites/stalagmites. what promotes the formation/growth of these structures?

I know, or think I do, the basic idea behind these natural structures, as from what I know they form due to water dripping from the top leaving a salt deposit behind. But started to wonder about...

22 February 2021 1,400 4 View

Wave velocity and rock density paradox?

Practically it is known that seismic velocity increases as rock density increases, why then does the wave velocity equation involving elastic moduli and density indicate that velocity is inversely...

09 February 2021 1,843 3 View

Distribution of modes fields ?

Hi, We find a specific distribution of electric fields in structure for different frequencies which can be seen using em solvers and known as modes. I would like to know how we can choose the...

04 February 2021 10,043 3 View

Conversion of Vs to Vp in geophysical surveys of rock masses?

Dear colleagues I would like to have your kind opinions on the issue that concerns rock mechanics and geophysics in relation to it, for a very specific problem I have. I have attempted to find a...

03 February 2021 3,605 3 View

Is Handheld XRF analyzer useable? and accurate in geochemical test?

What is the different between Lab XRF and Hanheld XRF, is it accurate and useable to analyze sedimentary rocks?

23 January 2021 9,941 6 View

What's the correct way of treating ordinal variable as continuous in regression?

08 January 2021 920 16 View