Conditions of using photometry analysis?

What is the concentration range that can be used in photometry?

10 November 2018 609 0 View

Prepare phenolphtalein 0.05%?

I read some papers about preparing phenolphtalein 0.05%. Add 0.05g phenolphtalein in a beacher and add 50mL ethanol 95% and 50mL distilled water. But I can exchange acohol content (such as 100mL...

10 November 2018 7,173 3 View

Why electrons don't directly move to hole transfer layer (HTL) in halide peroskite solar cell that flow round outer circuit?

And which layer is solid electrolyte in a halide peroskite solar cell?

10 November 2018 8,847 2 View

How to determine content of Ca2+ in CaHPO4.2H2O?

I can use HCl to dissolve CaHPO4.2H2O (CaHPO4.2H2O was created from Ca(OH)2 and H3PO4 with ratio 1:1, respectively) and use photometry method to determine PO43-. But Ca2+, how to determin Ca2+? If...

10 November 2018 869 3 View

Solubility of silicate?

Why Na2O.2SiO2 doesn't dissolve in water, otherwise 3Na2O.2SiO2 can dissolve in water?

09 October 2018 4,504 2 View

Mechanism of solar cell?

I don't understant about mechanism of solar cell. When light come in p-n juction is electron and hole will be separated at n semiconductor, p semiconductor, depletion region or all

08 September 2018 7,814 7 View

What is the mechanism of inhibiting ions in metallic incorrosion?

I read a article about metallic incorrosion (mild steel) by using new generations of phosphate based on anticorrosion pigments. This article have mentioned the modified pigments appeared to...

05 June 2018 2,508 0 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

Is CD44 degraded in lysosome together with hyaluronan after CD44 mediated endocytosis of hyaluronic acid?

Also when RHAMM binds hyaluronic acid, they get internalized, will RHAMM also be degraded? Or both CD44 and RHAMM will be transferred back to the cell membrane? Asking for breast cancer cell line...

01 March 2021 8,169 2 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

I want to performe MALDI-TOF MS for bacterial identification, I would appreciate it if anyone can tell me the matrix solution preparation protocol ?

based on what I've studied on multiple papers, for peptide and protein identification Alpha-cyano-4-hydroxycinnamic acid (CHCA) is an appropriate matrix to use, I also know that the CHCA powder...

26 February 2021 6,799 3 View