What's the difference between sp. accumulation and rarefaction curve?

I've searched and got few info about these but those info unable to clear my concept! Can anyone help me to provide crystal clear concept?

11 December 2019 10,020 3 View

How can we calculate UV light intensity or its dose?

We use simple UV lamp (UV-C) to irradiate an insect. Is there any other source we can use? How to control the radiation dose? Please mention the source of UV-B.

01 February 2018 6,710 4 View

Seek your suggestion.

Can anyone suggest me some research work/idea in interdisciplinary area including Ecology and Biophysical Chemistry?

06 July 2017 3,928 3 View

Can anyone help with a problem regarding the preparation of polymer nanoparticles?

I'm preparing a drug loaded polymeric nanoparticle. Can anyone tell me how to add a solution of hydrophobic drug+PLGA+acetone into a 2% solution of PVA with a syringe? What measure should I take...

04 May 2014 4,762 2 View

Is measuring diameter in DLS concentration dependent of the sample?

A number of times I observed that the diameter varies with the concentration of the sample while measuring hydrodynamic diameter of a sample by DLS technique. Could someone explain the phenomenon?

11 December 2013 4,800 3 View

How to save our home: our Planet?

Today we need to think about our planet earth. As we know "Charity begins at home". So, being an individual how can we locally participate and act effectively to save our planet? This is an open...

07 August 2013 6,428 10 View

Does anyone have experience with excitation wavelength of EGCG?

I want to observe the emission spectra of the flavonoid, EGCG in flurimeter.

06 July 2013 867 1 View

Can anyone help me to identify these nanoparticles?

I'm working on polymer based nanoparticles. They are generally round in shape as evident from SEM results. Last week I got few perfectly 'triangular shaped' particles along with so called polymer...

06 July 2013 2,753 27 View

How to prepare samples for TEM?

I would like to do TEM for my polymeric nanoparticles. How can I prepare samples for TEM analysis? All types of suggestions welcome.

06 July 2013 8,367 1 View

How to get polymer nanoparticles in pure powdered form after lyophilization?

I'm currently engaged in preparing a drug loaded polymeric nanoparticle. Is it difficult to get final lyophilized polymer nanoparticles in "powdered" form? If yes, what would be the possible...

06 July 2013 1,002 4 View

Polymer composites suddenly solidifies?

I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...

03 March 2021 7,540 4 View

What solvent can I used for Paal Knorr reaction between 6-amino hexanoic acid and 2.5 hexanedione?

I am try to make the Paal Knorr reaction between 2.5 hexnedione and 6-amino hexanoic acid, my problem is type of solvent to use, because 6-hexaminohexanoic acid is soluble in water but I am not...

02 March 2021 4,443 2 View

How to polymerize TEOS?

I want to polymerize TEOS on a surface. I know that NH4OH is a preferred catalyst and an alcoholic solvent should be used .But I can not find certain amounts of each material to use. Does any one...

02 March 2021 1,404 6 View

How to calculate Total Flavonoid?

I analyzed flavonoid total spectrophotometry, the procedure as below: 2 ml supernatan added 5 ml dd.H2O, then added 0,15 ml NaNO2 5%, 5 minutes later added 0,15 ml AlCl3 10%, After 6 minutes,...

01 March 2021 6,722 1 View

How can extract ciprofloxacin hydrochloride disolve in water er to organic solvent such as dichloromethan or any other solvent?

I need a procedure to extract the ciprofloxacin hydrochloride from aqueous solution by using dichloromethane in detail,. I thank you very much.

01 March 2021 4,306 1 View

How to separate water from glycerol solvent in a solvent recovery vacuum distillation column?

I am currently doing my third year design project. I have been assigned to design a glycerol recovery column in vinyl acetate monomer production. The process unit before the recovery column is an...

01 March 2021 9,525 4 View

How to make fractions of chloroform extract of plant, using seperating funnel?

28 February 2021 8,466 2 View

Why am i not getting solid after reacting APTES with salicylaldehyde?

The reaction of APTES with salicylaldehyde in ethanol leads to the formation of imine compound yellow solid which is mention in literature, but I am not getting yellow solid I don't know why? when...

28 February 2021 2,955 2 View

can I treat waste water containing solvents and alcohol with electrocoagulation?

there are solvents and alcohol in the waste water of a factory that produces disinfectants. Increasing this waste water requires very serious operations. Can I treat this waste water with...

27 February 2021 2,609 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