I have a balanced panel data of 12 countries and nine indicators. which methodology would give better results and what is the rationale of using it?

I have a balanced panel data of 12 countries (5 countries are developing and rest are advanced economies) and nine indicators. which methodology would give better results and what is the rationale...

03 September 2020 5,417 2 View

Other than the analytical scoring, what is the best way to make the scoring of EFL students' writing performance more objective?

I am working on a study in which I need to adequately evaluate my EFL students' writing performance.

10 December 2018 2,769 49 View

How do I find the ''dopant percentage (at.%)'' during the manufacturing of doped ZnO nanoparticles by sol-Gel Process??

I want developed Ag-doped-ZnO nanoparticles by sol-gel process with different at% (0.1,0.2,0.3) of dopant material so, how can I find this at% of dopant material ?? Thank You.... Regards.

01 December 2018 7,263 3 View

What should be the control variable?

12 November 2018 8,319 2 View

What are the potential health risks due to massive distributed antenna systems in our Neighborhoods? any tips for protection ?

A huge number of antennas (transmitters and recievers devices) systems popping up over the bulding in our neighborhoods, for the internet and communication services. what is the possible risk of...

27 September 2018 7,196 9 View

What precautions should be used when pouring concrete in hot weather ?

Placing Concrete in Hot Weather Caution needs to be applied when placing concrete in hot weather what are they?

07 July 2018 9,165 13 View

What do you suggest of the following to increase the punching shear of a RC slab with the reason?

1_ increasing the slab thickness 2- using drop panel 3- using shear reinforcement 4- increasing the concrete compressive strength:

07 July 2018 5,327 10 View

Do you have training courses to make models for my thesis on climate change and food security in Senegal?

Currently I am a student in Master II at the Faculty of Economics and Management of the University Cheikh Anta Diop Dakar.I finish this higher level with a dissertation whose theme is "the impacts...

01 June 2018 8,422 4 View

What is the best method to extract RNA (including miRNA) from plasma if it is needed for NGS RNA sequencing?

Dear all, Few years ago, I used miRCURY Biofluids from Exiqon for extracting RNA from plasma for detecting miRNA by qPCR. However, this product is currently discontinued since Exiqon is now...

23 May 2018 6,880 4 View

Can you freeze whole blood, and then subsequently isolate PBMCs?

Hi, we are working in a very resource limited setting where the lab resources on site are very basic. We are doing serial blood sampling for drug concentrations, which includes overnight samples....

08 May 2018 746 11 View

Polymer composites suddenly solidifies?

I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...

03 March 2021 7,540 4 View

What solvent can I used for Paal Knorr reaction between 6-amino hexanoic acid and 2.5 hexanedione?

I am try to make the Paal Knorr reaction between 2.5 hexnedione and 6-amino hexanoic acid, my problem is type of solvent to use, because 6-hexaminohexanoic acid is soluble in water but I am not...

02 March 2021 4,443 2 View

How to polymerize TEOS?

I want to polymerize TEOS on a surface. I know that NH4OH is a preferred catalyst and an alcoholic solvent should be used .But I can not find certain amounts of each material to use. Does any one...

02 March 2021 1,404 6 View

How can extract ciprofloxacin hydrochloride disolve in water er to organic solvent such as dichloromethan or any other solvent?

I need a procedure to extract the ciprofloxacin hydrochloride from aqueous solution by using dichloromethane in detail,. I thank you very much.

01 March 2021 4,306 1 View

How to separate water from glycerol solvent in a solvent recovery vacuum distillation column?

I am currently doing my third year design project. I have been assigned to design a glycerol recovery column in vinyl acetate monomer production. The process unit before the recovery column is an...

01 March 2021 9,525 4 View

Precipitate after adding laemmli buffer to protein solution containing Potassium Acetate?

Hi, I am running a size exclusion chromatography experiment with a buffer containing Potassium Acetate as a salt. I analyse these fractions through SDS-PAGE. After boiling my SEC fractions in...

01 March 2021 2,622 3 View

How to make fractions of chloroform extract of plant, using seperating funnel?

28 February 2021 8,466 2 View

Why am i not getting solid after reacting APTES with salicylaldehyde?

The reaction of APTES with salicylaldehyde in ethanol leads to the formation of imine compound yellow solid which is mention in literature, but I am not getting yellow solid I don't know why? when...

28 February 2021 2,955 2 View

can I treat waste water containing solvents and alcohol with electrocoagulation?

there are solvents and alcohol in the waste water of a factory that produces disinfectants. Increasing this waste water requires very serious operations. Can I treat this waste water with...

27 February 2021 2,609 3 View

How to replicate the well conditions of a crystal hit with 20%(w/v) isopropanol?

I had a crystal hit in a well with 0.1M HEPEs pH 7.5, 10%(w/v) PEG 4000, and 20%(w/v) isopropanol. Why is isopropanol in w/v here if it's just solvent? How do I recreate this well condition?

25 February 2021 9,761 1 View