Why was long alkyl chains for water repellency properties forbidden?

In literature, there are a lot of research about using chemicals containing long chain alkyl groups to prepare water repellenct substrate. However I heard chemicals containing these groups were...

09 March 2015 1,149 9 View

1 nm thick MgO thin-film to be deposited on Si wafer using thermal evaporation. What will be the optimum deposition conditions?

Favourable conditions of base pressure, rate of deposition. Also, by which characterisation technique to be used to verify the thickness of the deposited film.

28 February 2021 3,640 3 View

Amorphous silica XRD peak at around 10 degree?

21 February 2021 3,417 5 View

How to prove the formation of a synthesis product using NMR ?

Hello, I am trying to identify the formation of a synthesis product. Knowing the precursors, I focused on the identification of the H-C long-range coupling between sites (a/b) and (a/c) using...

19 January 2021 8,438 5 View

How do you characterise stainless steel 17-4 PH microstructure fabricated by selective laser melting?

Hello everyone, My project is to investigate the microstructure of stainless steel 17-4 PH fabricated by selective laser melting. SS 17-4 PH is predominantly a martensite matrix with some...

20 December 2020 4,037 4 View

How to characterize the pore size of membrane filtration with bubble point method?

Hello everyone, I am having troubles with the bubble point measurement to find the pore size of my self-fabricated microfiltration membrane, and I couldn't find a proper answer anywhere else. It...

16 November 2020 7,574 1 View

Applications of Digital multimeters in current scientific research?

I am interested to know the research areas in which advanced multimeters (e.g. Rigol DM3058E or Fluke 8808A or any other multimeter) are used. I am aware that they can be used for: (a) 4-probe...

30 September 2020 8,176 2 View

How to best characterise a new salt?

I am wanting to synthesize a few aluminium salts. What is the best technique to characterise salts?

03 August 2020 8,543 4 View

What's the reason for the crossover of illuminated and dark JV curve in CIGS solar cells?

The distinct crossover anomalies are observed in my recent samples. It's explained in the book that there might be a barrier at the interface or in the absorber's near interface region.The barrier...

29 May 2020 675 4 View

Is there a way to convert MPN (most probable number) to CFU (colony forming unit)?

I am conducting a meta-analysis and most of my studies report values for bacterial analysis in CFU. However, I have one study which reports its microbial values in MPN. What should I do?

29 April 2020 662 5 View

I need to identify the genus of this colony just by its morphology, can somebody help me?

I know that: 1. It was grown on TSA under mesophilic conditions (~30 Celsius) for a week 2. the clearer and smoother colonies are E. coli (accidental contamination)

06 April 2020 8,764 3 View