Can we expect a reduction in the population of particles in SEM images in the form of particles and after making their films?

I took scanning electron microscope images of my samples in powder form and after coating their films. In powder form, a large number of particles can be seen however, in the films only a few...

06 July 2019 1,956 4 View

Which solvent is suitable for analysing the UV Vis spectra of a polydiacetylene compound?

I want to study UV Vis spectra of a polydiacetylene based compound. It is a polymer and is not soluble in most of the solvents. i tried dissolving it in ethanol, butanol, chloroform, DCM, THF, DMS...

09 October 2017 2,579 3 View

What makes some of the diacetylene compounds highly UV sensitive?

05 June 2017 2,994 4 View

How is shift in Raman peaks of polydiacetylenes related to change in their conjugation length?

The shift in Raman peaks implies increase or decrease of conjugation length of polydiacetylenes?

03 April 2017 1,698 3 View

Why is it important to purify a polydiacetylene compound before use? What are the methods to purify them?

If we use 10,12 pentacosadiynoic acid for a reaction, is it mandatory to purify it before use? How can it be purified, without loosing its color sensitivity?

02 March 2017 1,724 1 View

Does the nanoparticle form of monomers increase the chain length during radiation induced polymerization?

During radiation induced polymerization of diacetylenes will it be useful to prepare monomers in nano range to increase the chain length.

11 December 2016 6,764 4 View

How is excitation energy transferred from the side group to the triple bond in diacetylene?

Diacetylenes are a conjugated system consisting of two triple bonds. The solid state polymerization of diacetylenes proceeds as 1,4-addition to the conjugated triple bonds and gives rise to...

06 July 2016 8,663 1 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 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

What is the state of the drug inside solid lipid nanoparticles (SLNs)?

I am a little confuse with the mechanism of solid lipid nanoparticles (SLNs). The main point of encapsulating drugs into SLNs is because some drugs have low solubility in water. Therefore, SLNs...

01 March 2021 3,703 3 View

Why is the sum of the elements in a row in a Q matrix equal to zero?

When explaining substitution models, the substitutions are expressed as Q matrix. Why is the sum of the elements in a row zero?

28 February 2021 3,864 3 View

Does different dilution factors affect negatively on NH3 reading ?

I have a sample of treated water sample & asked to obtain ammonia conc. in sample using a machine with 5-25 ppm detection range. However, upon testing with different dilution factors, all...

27 February 2021 8,483 3 View

LEDs on Vis Light photo degradation of MB water sol via N doped TiO2 in a mini flume?

Good day to all, I have no experience with light emitting diodes. I am building a glass mini flume to demonstrate the photo degradation of Methylene Blue in water running over self cleaning...

26 February 2021 4,026 5 View

To date, according to health authorities, 30% of the population's diseases are initiated by drinking water pollution. Do you know this problem?

The main studies are as follows: * regular and timely receipt of information about the state of the environment using automated systems (stationary and mobile); * operational analysis of the...

23 February 2021 912 5 View

Multinomial probabilities and confidence intervals - obtaining the CI of the reference category?

Hi, Some background to my question: I have fitted 1st order multinomial Markov models with covariates. Since all probabiilties (for each row of the transition matrix) sum to 1, I estimate only...

22 February 2021 2,541 4 View

What are some underexplored theories and concepts in Activated Carbon as A Water Filter?

Hi, me and my team mates are currently planning to pursue the topic of Activated Carbon from Coconut as a Water Filter. And we would like to ask for your suggestions and knowledge on what specific...

22 February 2021 6,569 3 View

How to extract water soluble amino compound from after aqueous work up?

4-Dimethyl amino pyridine is used in reaction.Product formed contains amino group along with amide & is highly water soluble. To remove 4-DMAP aqueous work up done. Please give solution. Thanks.

21 February 2021 1,883 1 View