Has anyone ever done research on employment for people with disabilities especially in public service?

I am currently doing my research on employment rate of people with disability in public service. I would be glad if someone has done or is doing the same topic.

19 March 2020 4,631 3 View

What is the best condition for analysis of methanol and formaldehyde with Gas Chromatography in a FID detector?

We are having a problem analyzing methanol and formaldehyde in an aqueous sample. We have a HP-Carbowax and Rtx-1 column. What is the best column for separation of methanol and formaldehyde? What...

22 April 2014 4,724 5 View

What do you expect from IR spectra of nh4-zsm-5?

I don't know what the difference is between IR spectra for na-zsm-5 and nh4-zsm-5. Any suggestions for what is the right characterization for knowing the exchange of Na ions to NH4 ions from...

30 March 2014 4,249 3 View

Which of these three methods for calculating the concentration of a metal sample is true?

I am kind of confused calculating the concentrations of some metal samples in my work. I digested a sample with acid then diluted it in a 250 ml volumetric flask. When I measured with AAS the...

27 March 2014 7,185 45 View

What weight to calculate the concentration of hexavalent chromium in the metal plating? Is it the weight of sample or weight of the plating?

I determined the concentration of hexavalent chromium with spectrophotometer uv - vis with diphenylcarbazide, after the extraction with base solution from metal plating. for calculating the amount...

26 August 2013 7,672 3 View

Can we determine speciation of chromium in small steel parts?

Is it possible to determine the concentration of hexavalent and trivalent chromium in solid sample such as small steel parts? using uv-vis, aas, or icp-ms, probably How to extract hexavalent and...

14 July 2013 1,117 4 View

What are the different structures, reactivity and activity of ephedrine and pseudoephedrine?

What are the different structure, reactivity and activity of ephedrine and pseudoephedrine?

06 November 2012 8,985 1 View

Role of Rhizosphere microorganisms in Nutrition of Plants

Rhizosphere microorganisms are the main drivers of turnover of organic C, N, and P and thus recycling of organically bound nutrients, for example by ammonification and nitrification, but may also...

01 January 1970 3,761 3 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

Chlorinated organic formation in odor control scrubbers using hypochlorite?

I'm involved in a study of odor control technologies for municipal wastewater treatment plant. One of the control options involves a chemical 2-stage (acid/alkaline) packed bed scrubber. The...

03 March 2021 3,661 2 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

How Relativistic effects is one reason for lanthanide contraction?

The Lanthanide contraction which is the decrease in ionic radii of the elements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, is due to poor shielding of the 4f...

01 March 2021 2,272 4 View

Ester cleavage conditions?

Hi all, I need to cleave the ester in Ethyl 2-amino-1H-imidazole-5-carboxylate to make the carboxylic acid and retrieve the product from solution to use in downstream applications of linking to...

01 March 2021 8,766 3 View

How to replicate the well conditions of a crystal hit with 20%(w/v) isopropanol?

I had a crystal hit in a well with 0.1M HEPEs pH 7.5, 10%(w/v) PEG 4000, and 20%(w/v) isopropanol. Why is isopropanol in w/v here if it's just solvent? How do I recreate this well condition?

25 February 2021 9,761 1 View

How can we theoretically calculate Elemental analysis(percentage) of atoms in covalent organic framework?

For example in one research article the Elemental analysis values of COF-TpPa-1 ( Triformylphloroglucinol (Tp) (63 mg, 0.3 mmol), Paraphenylenediamine (Pa-1) (48 mg, 0.45 mmol) are as follows...

24 February 2021 1,265 6 View

How to Control Whiteflies in coconut leaves?

24 February 2021 1,005 1 View