Is there a correlation between oil polarity and required HLB in triglycerides?

Greetings! I am working with oils like wheatgerm, rice bran oil, watermelon seed oil in skincare formulations for emulsions. Is there a correlation between polarity index of the triglycerides...

05 September 2020 3,253 3 View

Where can i find the Relative polarity / polarity index of oils for cosmetic emulsions?

Hello all, I am looking for the list of polarity index of oils used in cosmetic emulsions. I could only find a limited list on http://www.freepatentsonline.com/y2004/0258654.html Can anyone...

26 August 2020 3,322 3 View

What is the microscope magnification required to study emulsion droplets in cosmetic lab?

Hello, I want to be able to study the droplets in oil in water and water in oil emulsions. I am setting up a small scale cosmetic lab for my learning purpose. Can anyone suggest what...

18 August 2020 4,219 3 View

Hello, Is non-ionic surfactant HLB system still relevant to the new natural emulsifiers? Has anyone found it not suitable working with HLB system?

I am a student learning organic skin care formulations with interest in natural emulsifiers like the OliveM series, Montanov Series etc. I understand that the HLB system is used for non-ionic...

01 August 2020 5,972 2 View

Looking for Materials with high thermal expansion coefficient and high temperature resistance?

03 March 2021 8,272 1 View

How to grow E.coli on the low salt LB agar plate with 50 or 100ug/ml of Blasticidin?

Hello, I would like to ask how to grow E.coli which resists 50 or 100ug/ml of Blasticidin. I have tried many methods by using low salt Luria-Bertain(LB) agar plate. However, no colonies grow. Let...

01 March 2021 2,027 2 View

Is anyone familiar with the cyclic compressive fatigue testing (BS EN 12697 - 25) ?

I would like to get more information on the cyclic compressive fatigue testing (BS EN 12697 - 25) which is typically done for bituminous material in pavement design. Any one can advise on the...

28 February 2021 2,004 3 View

Are there lab markers/pens resistant to Roti-Histol?

Hi, I'm looking for a pen/marker to write on the smooth, transparent (non-frosted) part of microscopy slides which does not get washed away by alcohols and most importantly Roti-Histol. I want to...

24 February 2021 9,902 5 View

Can we recognize signs of the "volatility clustering" property of a time series in its time domain plot?

My purpose is to recognize the volatility clustering property without statistical tests such as The Lagrange Multiplier (LM) test.

24 February 2021 4,150 3 View

Which microtomy technique do you suggest for thin and delicate root sectioning ?And, how to preserve and process the roots before sectioning?

We have thin roots of from 1 year old different species of plants. We are looking into anatomical details of the roots. What's the best method to preserve and process the roots once they are...

23 February 2021 1,898 1 View

I have a problem with kanamycin - why the kanamycin doesn't affect?

Hi everyone, I need to expression of GFP with pET28 plasmid in E. coli BL21(DE3) plysE. Transformed cells have kanamycin and chloramphenicol resistance. Normally, only transformed cells should...

22 February 2021 4,032 4 View

How does elongation affect the resistance of an electrode?

What are the testing rate for electrodes recommended by ASTM for cochlear implants. I am currently doing the 15mm/min elongatio testing.

22 February 2021 1,515 1 View

Resistivity of PVD TiNx thin films vs. N2 flow?

In the PVD of TiN thin films (~100A), I've found the resistivity of the TiN films dropped from ~100 to 60um*cm with N2 flow increasing up to the metallic mode ending point; then the resistivity...

21 February 2021 1,864 2 View

How we can measure Kemp % in wool without using of benzene?

Would you please let me to know about the methods for measurement of medullation and Kemp % on animal? My problem is that the wool sampling and sending to laboratory is not possible. So I would...

21 February 2021 7,260 4 View