Is there a way to estimate the boron concentration in boron-doped hydrogenated amorphous silicon from the infrared spectrum?

More Ketroussi Khadidja's questions See All

What is the purpose of comparing the biodiversity of entomofauna between two different ecosystem ?

what is the purpose of comparing the biodiversity of entomofauna between two different ecosystem?

24 September 2023 3,689 2 View

Bacterial RNA extraction by Trizol ?

after adding Isopropanol, and centrifuging, I’m not seeing visible white pellet at the bottom of the EP tube, is that means I proceed wrong ? please need some help !

24 May 2023 1,535 3 View

How can do a modalization of panel photovoltaic of third generation?

we need in this work a electric caracrisations of cells or panels photovoltaic of third generation as : organic, alliage,......etc

09 February 2023 9,126 3 View

How do we choose the initial parameters of the MSER?

Dear researchers, I would like to work with the algorithm Maximally stable extremal regions (MSER) for the skin lesion images. The MSER has 9 parameters. The problem is how do we choose the...

01 February 2023 2,130 0 View

I'm dealing with a moist olive pomace and i want to extract the polyphenols with the most inexpensive solvent ?

hello all I'm trying to extract the polyphenols from the moist olive pomace so I have to choose an inexpensive alternative solvent of methanol and ethanol , any help

24 October 2022 5,056 1 View

How do I prepare a 0.1 mM of DPPH from an already prepared solution of 0.1% DPPH?

I want to assess the radical scavenging activity of plants extracts using the DPPH method. My protocol is stating that I need to prepare 0.1 mM of DPPH in methanol. However I don't have the...

28 March 2022 8,040 5 View

How to calculate the received power using the transmission coefficient?

Hi there Having the results of the S21 (transmission coefficient) how one can deduce the received power? Or What is the relationship between both parameters? Thanks in advance

08 January 2022 7,242 5 View

Which solvent can I use to prepare a stock solution og my plant extracts?

I have extracted the plants using ethanol (70%), ethyl acetate and water and dried them as much as possible using. Now I want to know the total phenolic contents of the extracts using the Folin...

09 November 2021 4,305 4 View

How to quantify XRD phases?

Hi experts ! how to calculate the percentages of each phase for XRD analysis (phase quantification) ? what are the possible methods?

06 October 2021 4,957 5 View

What kind of database do you use for analyze XRD ?

Hello every one, I need information's about database used currently to analyze XRD ? how can I find it ? and it's possible to download?

29 September 2021 3,321 7 View

Why results of ROS flurescence are negative as there was no bacteria within?

Hello. I am working on ROS production of two systems: system A is cerium oxide and hydrogen peroxide, system B is cerium oxide nanoparticle, hydrogen peroxide and potassium bromide. I did some...

04 August 2024 5,974 3 View

How to Transform my handy-wavy explanation of why group I/II metals oxides in aqueous solution are basic into a rigorous argument?

I heard an explanation about something being a better proton acceptor or lone pair donor but that doesn't make sense. I couldn't explain in in terms of acid-base theory. The hand-waving way I saw...

03 August 2024 9,918 0 View

What is the ionic radius of Hydrogen anion? And how to know the exact ionic radii of the elements?

I'm trying to calculate the tolerance factors of the hydride perovskite and the value calculated by me and the reported values are contradictory. Need more clarity in using the correct ionic radii...

01 August 2024 2,614 1 View

How to make the concentration measurements for the hydrogen absorption/desorption in the metal hydride?

Hello Everyone! I am trying to create a metal hydride system where I am trying to create a temperature control with the emphasis on measuring the concentration of the hydrogen with the hydrogen...

29 July 2024 7,577 2 View

What change would occur in physics if the three different sizes of the proton and the two sizes of the deuteron accepted as new physical constants?

For people today, the enigma of the size of the proton still remains enigmatic. However, being myself a researcher in new physical theory which makes it possible to extend the different standard...

28 July 2024 7,823 1 View

Can anyone guide me the best method to analyze the XRD data???

I will be doing an XRD on a sample which is powdered in natured and is a hydrogenated compound. I would like to know how we can understand the individual components and components by using the...

28 July 2024 4,548 2 View

What is the right voltage sweep direction for characterization of HER kinetics?

In general, when performing a Tafel analysis for corrosion resistance measurements, a line voltage scan is performed from say -250 to +250 mV vs. OCV at low scan speed around 0.125 mV/s. However,...

25 July 2024 7,982 3 View

How to saturate steel samples with hydrogen?

I have tried to saturate ferritic steel with hydrogen using the electrolytic method and H2SO4. However, the effect was very poor even after 3 days of "saturation". Can anybody help in choosing a...

24 July 2024 4,393 2 View

When I am trying to distill triethyl amine while drying it over calcium hydride. How do I design the setup to let hydrogen escape without losing NEt3?

I am new to research. The boiling point of triethyl amine (NEt3) is 89 degrees centigrade. I am skeptical that when I will let the hydrogen escape which is getting generated in situ, I will also...

21 July 2024 7,284 4 View

How do i go about my research which is about the integration of solar and wind power to produce green hydrogen?

Let me say I have a solar plant in operation and I want to build up a wind power plant, and later make a hybrid so that I could power the electrolyser as load for green hydrogen production.

14 July 2024 9,547 4 View