What is the reason of weight gain in TGA curve of a HDPE polymer sample ?

HDPE samples were aged at higher temperatures in the presence of water and CO2 than the TGA test was performed in Nitrogen? Weight gain is seen in the curve? What could be the possible reason for...

16 January 2021 5,644 2 View

After extraction of essential oils from medicinal plants or plant parts, what are the possible ways to utilize the leftover?

If we extract the essential oil from a medicinal plant i.e., Ajwain seeds by hydro-distillation technique, it will yield about 2-3% essential oil. My question is about the remaining 97-98% portion...

16 December 2020 5,561 6 View

HOMER is used for optimal plant sizing and feasibility study across the globe, the optimal results are reliable?

Currently, solar installment at domestic level is at peak without any feasibility study. I used HOMER for an optimal plant size for green energy generation at community level. Please guide me...

15 November 2020 1,121 8 View

Why material with same structure and composition performs differently in RAMAN Spectroscopy?

I was carrying out RAMAN Spectroscopy for MOFs. I have been carried out the XRD and EDX analysis for three samples synthesized by a different protocol. The crystal structure and chemical...

13 September 2020 7,167 5 View

How can we determine doping concentration?

How can I find the exact doping concentration in a chemically synthesized material? As there is no possible reaction which produces the same doping concentration of initially added ratio in a...

02 September 2020 3,613 11 View

Why sample disappear during SEM imaging?

One of my colleagues is working on the synthesis of metal oxide nanoparticle. We got a surprising issue in SEM analysis. When we start SEM imaging the sample got disappear within few second while...

27 August 2020 1,949 6 View

How to get an XRD peak for 2nd coat (MgF2), which is coated on Cadmium Telluride glass substrate?

We coated Magnisum Fluoride (1.5 Molar) solution and Spin coated on Cadmium Telluride (CdTe) glass plate. Anealed (heated in oven) at 70*Celcius for 2 hours and then sent for XRD. But we got only...

19 August 2020 1,678 3 View

How to check number of publications and citations per year on a specific keywords?

Hi, Can somebody please explain how to collect the statics of number of publications and citations per year on a specific keyword? For example, I want to know the exact number of publications and...

22 July 2020 214 2 View

By reducing normal force the cofficient of friction COF increases in some cases. what is the main reason or reasons for this behaviour?

Tribology test conditions: Substrate thermoplastic, Counterpart steel ball. Using 1N normal force and 0.5N normal force, Speed 100 mm/s

21 July 2020 5,746 4 View

How to measure (or predict) health of a DC contactor or a DC relay ?

I need help in understanding the mechanism to measure/estimate health of DC contactors and DC relays used in industrial grade power systems. What are the mechanisms and tools used for this purpose...

10 May 2020 1,452 3 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Which is the most efficient etching solution for nickel based alloys?

Which solution reveals the microstructure and features of nickel-based alloys?

02 March 2021 2,221 3 View

Which reagent is best among 'Dimethylglyoxime" and "Dithiothreitol" for spectroscopic determination of Nickel ?

What I think is Dithiothreitol. As it is water-soluble and does not form a precipitate. But, the thing is it contains sulphur which is quite hazardous to aquatic animals.

01 March 2021 8,374 4 View

Can water be extracted from Olivine?

I have always been interested in geology and wondered about how unique structures of materials behave in different circumstances. I stumbled upon Olivine, the magnesium iron silicate, and heard...

28 February 2021 7,330 4 View

How does charge on working electrode changes with rising potential?

During performing CV of a GCE or modified GCE, we rise the potential in the first half of the cycle and reduce it in reverse half. During the first half, what is the nature of charge on GCE or...

25 February 2021 7,994 3 View

What is the detection limit of ED-XRF technique for transition metals in silicon ?

Hi everybody, please, can someone tell us if the transition metals (W, Fe, Ni, etc ...) in silicon destined for solar cell manufacturing can be detected by ED-XRF technique. Note that the...

18 February 2021 6,231 4 View

Passivation of chromium cast Iron in high temperature?

14 February 2021 2,157 3 View

Why ICP-MS test for Teflon filters that collected PM2.5, show really high results in the millions of ug/g ?

I analyzed soil and ash samples using ICP-MS for 28 metals, then I resuspended those samples to collect PM2.5 particles in a filter using a selective inlet inlet. My only issue that Fe and Al...

13 February 2021 7,592 3 View

How to interpret different leached phases of metapelites?

Extraction of three different phases of metapelites, mostly phyllites as the Carbonate phase, Fe-Mn Phase, and Silicate phase has been obtained. After doing ICPMS, different results have evolved....

11 February 2021 5,198 10 View

How can I take subsamples of water from a larger sample in a way that allows me to measure the iron content of the subsample?

I learned how to take subsamples with a magnetic stir bar, but I noticed iron particles stick to the bar, and I am having trouble finding a standard method to solve that problem. How can I take a...

04 February 2021 4,778 1 View