Dear professors and colleagues, a blue spot develops on tlc which is seen in visivble light, but once i spray with anisaldehyde, heat it disappears?

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Does anyone have this article: the morphology and anatomy of. Yucca L. Ph.D. thesis, Univ. of Calif., Berkeley. . 1962.?

i need it desperately. thank you so much

31 December 2018 1,923 4 View

Are we supposed to have the same type of adducts for all peaks in ms spectra?

Dear ms experts is it possible to get some M+ ions, some M+ H, some M + 2H FOR different component in an extract but during the same run

09 October 2018 9,908 0 View

Is there a lab in Egypt which has counter-current chromatography device?

I need counter current technique to separate very close compounds

08 September 2016 5,879 2 View

Should a plant extract be dissolved in DMF or DMSO only for antimicrobial assay?

the extract dissolved in ethyl alcohol gave negative results...could it be due to poor diffusion to agar?

09 October 2015 2,631 10 View

Please can anyone send me the AOAC 2007 method for total phenolic content?

OFFicial methods of analysis of AOAC international. 18 th edition ..2007

07 August 2015 4,429 0 View

Controlling for pupil light reflex when analyzing pupil size time course?

I used eye tracking to examine how participants from two different populations (A and B) react to an image. Participants in population A exhibit larger pupil sizes over time, but they also have...

10 August 2024 3,229 0 View

How to fix errors in my heat transfer steel structure with reinforced concrete slab model Abaqus?

I have modelled a steel structure using beam elements in Abaqus and attached to this structure reinforced concrete slab. The analysis that I am making is heat transfer of the structure. The...

07 August 2024 1,028 0 View

Why does my protein refolded to beta sheet during thermal denaturation analysis?

Hi! So i attempted to understand a novel protein behavior towards heat application by analyzing its secondary structure change. I subjected the protein to a thermal denaturation analysis using...

06 August 2024 1,989 3 View

How to heat polymer for about 130° without oil bath ?

is there any other way to heat a polymer evenly other than oil bath if so what are those and how to use it

06 August 2024 947 1 View

What should I do with parameters that are not relate to my simulation in MyLake model?

I want to Estimate surface heat fluxes using MyLake, but I don't have all the initial values in model parameters section and other sections,is there a way?

04 August 2024 1,537 1 View

Z-average size from Dynamic Light scattering can it be lower than the original probe size?

Hi everyone, Recently I have been conducting Dynamic Light scattering experiments in a micellar solution at 5 and gel at 37 degrees of Celsius with latex particles of diameter 190-500 nm. While...

01 August 2024 1,168 4 View

While doing Chronoamperometry, when the light is turned off, why the current is not decreasing sharply?

Here, I have used Ag/AgCl as reference electrode and 0.5M KOH.

29 July 2024 4,538 3 View

What are the perfect mathematical model for a solar-powered ship implementation?

A computational study of heat flux on cylindrical surfaces using CNT hybrid nanofluids

28 July 2024 4,985 1 View

Seeking recommendations for equipment to mimic sunlight and heat up a greenhouse system?m?

I would like to conduct artificial sunlight experiments to mimic heat capture and air warming in a greenhouse system. The main objective is to heat up the temperature inside the greenhouse, not...

28 July 2024 4,006 2 View

Aqua regia not heating up?

I used Aqua regia to clean Au nanoparticles in the used glassware. But for some reasons, it is not heating up upon mixing. The color did change from no color to light orange. The Au NPs on the...

25 July 2024 4,390 0 View