How many species of living beings are there on the Earth?

10 August 2018 1 3K Report

Do we know the exact answer? What is estimated number of species on the Earth? Ho many species are already discovered/ described? Any exact figures?

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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

How to calculate average trend in maximum annual NDVI from MODIS?

I am wanting to calculate the average trend in maximum annual NDVI in Iceland from 2010-2020 using MODIS MYD13Q1 V6. How would I do this? I have currently inserted the NDVI bands from the MODIS...

02 March 2021 752 2 View

Where can I find atmospheric measurement profiles (temperature, density, etc.) between 300-800 km altitude?

I am investigating thermospheric mass density profiles between 300-800 km altitude. I would like to compare the variability with other parameters, including temperature, electron content,...

01 March 2021 5,902 3 View

Trouble with Charting with Google Earth Engine (Technical)?

Hello. I have a problem with the charting in google earth engine. I created an image collection by combining 5 image collections of five parameters and using ee.Join.inner ( ) and .apply ( )...

26 February 2021 7,084 2 View

How to compute the distance in km between two points inside the Earth?

Hello everyone. I am looking for a simple formula to compute the distance in Km between two points inside the Earth. I do not mean the usual problem between to cities (distance along the surface)...

02 February 2021 3,455 4 View

SAR X-Band constellation from Capella Space?

Dear all, I'd like to open here a sort of forum for understanding how the geodesists community is moving in view of the X-band SAR satellite constellation. The new constellation will offer new...

24 January 2021 6,248 0 View

How do you start building a data set for machine learning?

-Required are DEM/DTM satellite data from mountain ranges without glaciers. For example SRTM 30m. -The data has 3 parameters only. X, Y and Elevation. There is no need for georeference or...

22 January 2021 4,059 6 View

What are the natural background values of Major,Trace and REE elements in sediments deposited by Indian rivers?

We are working on geochemical analysis of sediments derived from eastern and western ghats of India.

20 January 2021 8,963 6 View

Anionic sulfate complexes of rare earth elements, are they real?

Can you please tell me if there are anionic sulfate complexes of rare earth elements? And, if so, can you advise sources where you could read about it. Thank you!

17 January 2021 8,812 2 View

Can someone kindly explain a method to generate kmz./kml. of a scanned raster image map using ArcGIS without changing its original resolution?

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14 January 2021 3,692 2 View

What is a variabel to analyze empirically or attest a theory of Malthus (Economic Major)?

I have a project to evidence Thomas Robert Malthus theory about a principal of population (Malthusian Spectre/Malthusian Trap). I want to attest, his theory about a relationship of population and...

02 January 2021 8,146 3 View