Nitrogen Graphene Quantum Dot(NGQD)

More Simeon Pama Sunday's questions See All

What are the conceptualize steps in the production of biodiesel using cashew nuts shell?

Block flow diagram for the production of biodiesel using cashew nuts shell

31 May 2024 4,480 0 View

Resource Supply gap and Capacity utilization: which of these is more critical for Small and Medium Scale enterprises in Sub-Saharan Africa?

Any economy with a sound SMSE will have less issue on youth unemployment. On paper, the economy of the region have invested a lot on the development of SMSE. However, the result has not change...

16 December 2023 7,468 1 View

What are efficient land-saving technologies available for application in the agricultural sector of Sub-Saharan Africa?

The population density in the Sub-Saharan region of Africa is mounting. As the region battled the increasing population, there are needs to plan for the future generation. The region needs a...

16 December 2023 4,320 2 View

How to calculate the double layer capacitance from a Nyquist plot graph of EIS ?

From the EIS plot i have ( ie Nyquist plot), for plant extract in an acidic medium for corrosion inhibition on mild steel, how can i find the inhibition efficiency, double layer capacitance and...

17 September 2023 9,690 5 View

How do dry graphene quantum dot?

Hello, How do you effectively dry graphene quantum dots in an aqueous solution in the lab?

25 August 2023 1,681 1 View

How do you feel when your article is accepted, especially in high impact factor journal?

Recently, the rejection rate is becoming alarming. The way people react when their papers are rejected seems not to be same when it happens in the opposite.

02 July 2023 1,967 12 View

Can you recommend a standardized scale for financial Literacy?

I need a standardized scale or questionnaire to measure financial literacy. Preferably, a financial literacy questionnaire that can be used among undergraduate students. Thanks.

02 June 2023 1,296 2 View

Can someone recommend a standardized self-medication behaviour/practice questionnaire for me?

I am looking at self-medication behaviour or practices among undergraduate students. I am looking for a standardized questionnaire items that i can either adopt or adapt for the purpose of my...

25 April 2023 3,803 2 View

Cp = a + bT +cT² + dT³. What does a,b,c and d mean. In energy balance calculations, they usually omit the "c" term or take it as zero. Why?

I'm currently working on my design project as a final student. I'm having some issues with the energy balance chapter, please if you can, also send me the heat capacity constants for SUCROSE,...

19 February 2023 5,154 2 View

Can real science laboratory experimental research project not be for award of Postgraduate qualifications in science education ?

In a situation that a science concept is taught only theoretically as abstract without method of demonstrating it for learner due to lack of already known method, but one wants to design and...

13 January 2023 6,504 1 View

What is the solvent for 8YSZ nano material?

I need to do some experiment with it in liquid form.

07 August 2024 613 3 View

How to use Density Functional Theory to calculate carrier mobilities of solid system?

Hello, everyone. I have tried to determine carrier motilities of some materials, by Density Functional Theory, using Quantum ESPRESSO. There are a few methods to do it, like a package called...

04 August 2024 8,894 1 View

Which solvent is better to dissolve with secondary metabolites extracted from fungi?

I work on MCF7 cell cell for anticaner purpose and I wa to do drug preperation the drug ( secondary metabolites extracted from Aspergillus) My question which solvent is better with these secodary...

03 August 2024 4,725 2 View

Short Synthesis of Graphene Oxide from Natural Graphite Flakes?

I am in search of a modified Hummer's method, which can be used to synthesis graphene oxide within 6-8 hours. As I am a student it is not allowed for us to work after 5 in the laboratory. So I am...

01 August 2024 8,368 2 View

I need to dissolve stigmasterol for an animal experiment, it hasn't dissolved in either DMSO or vegetable oil. Can anyone recommend the best solvent?

Hello everyone, I need to dissolve stigmasterol for an animal experiment, but it hasn't dissolved in either DMSO or vegetable oil. Can anyone recommend the best solvent for stigmasterol?

01 August 2024 7,504 2 View

For the moringa oleifera extract using ethanol as the solvent,what is the alternative method to concentrate the extract other than rotary evaporation?

99% pure ethanol was used for maceration also alternate methods along with the temperature and time to concentrate the extract can be specified

31 July 2024 5,113 4 View

How can I separate graphene from amorphous carbon of similar particle sizes?

The starting material is a finely ground powder. Some particles contain more graphene than others.

30 July 2024 3,978 2 View

HAs anyone used TGA to find activation enegy of water evaporation?

I have different polymer solutions and I hypothesize that water molecules are retained based on the water-polymer interactions, so the amount of free water is less to intercat with drug tablet....

28 July 2024 9,545 6 View

How can I use DFT-D3 correction ( Siesta version 5.0.1)?

Dear Siesta Users, I installed Siesta 5.0.1 and I want to use Grimme's D3 correction. According to the 5.0.1 manual, I could use a few parameters to include the D3 correction in the...

27 July 2024 5,748 0 View

Why methanol and sulphuric acid used in the analysis of polyhydroxyalkanoates (PHA) by GC-MS?

Why methanol and sulphuric acid, used in the analysis of polyhydroxyalkanoates (PHA) methyl esters by GC-MS? Additionally, why do we typically use non-polar solvents in GC-MS?

22 July 2024 1,210 2 View

Pavel Yudaev

Dear Simeon Pama Sunday. After evaporation of the solvent on a rotary evaporator, a fine powder is formed. To study the morphology of particles, transmission electron microscopy is necessary.

Best regards, Pavel Yudaev.

Simeon Pama Sunday

Hello Pavel,

Thank you for your response. Have you worked with NGQD that are oily after solvent evaporation?