Does using a likert scale in my qualitative research will make it mixed method?

I am conducting a qualitative research and using two qualitative data collection tools (1. Reflective journal 2. Semi-structured interviews). In the reflective journal I have asked the...

10 December 2020 4,672 7 View

How to analyze DPPH antioxidant scavenging of AgNPs synthesized by natural methanolic extract?

How to make stock solution which diluted into various concentration (ex. 10, 20, 30 ppm) and added by DPPH solution. Then read by spectrophotometer UV-Vis? Should I sentrifuge the solution of...

10 December 2019 8,354 5 View

In TEM sample preparation what quantity of nanoparticle needs to be mixed in ethanol before ultra-sonication? min quantity that gives results?

I have to send sample in another city for TEM analysis, they said send prepared sample..

25 June 2019 5,113 3 View

How to simply fabricate homogenous boron nitride film on the slide glass?

Hello, i have a question regarding on surface fabrication technique, since i am not familiar with this work before. I am going to try to fabricate a thin boron nitride (BN) film on the bare glass...

03 December 2018 3,406 3 View

What is the minimum concentration of methanol extract of plant non-toxic to human cell-line? Should I use the extract and bacteria at the same time?

I am testing effect of plant extract on human cell line (hacat) infected with bacteria. My extract is prepared in methanol (10 g of plant in 100ml of methanol). What concentration of extract...

03 December 2018 2,169 3 View

Can restriction enzymes only be added to the end of a primer or is it possible to add it within the primer sequence?

Testing primers previously designed where restriction enzymes were located in the middle of the primer sequence but not sure whether this is actually possible.

02 May 2017 2,969 3 View

Could somebody help me about small scale endophyte fermentation ?

I have read some methods to start endophyte fermentation. Some using starter, and some are not. I wanna ask three question 1. how important is starter for small scale fermentation (100 mL) ? 2....

09 October 2016 7,720 10 View

When doing antioxidant assays (plants), would one need to generate a standard curve for the specific assay?

I will be doing the DPPH. SOD, CAT , AP and GR assays and was wondering how I'd determine if there is any effect when comparing my plant samples subjected to different abiotic and biotic stresses.

17 March 2015 4,066 5 View

How does to calculate treatment time for Cobalt-60 teletherapy unit in SAD/isocentric technique?

Treatment time (for teleterapy unit) is similar with monitor unit (for LINAC). Manual calculation for MU or time depends on dose delivery technique, there are SSD tech. and isocentric tech. To...

25 December 2014 3,099 3 View

Does anyone works with tobacco pathogens? If yes, will you be able to provide me with it?

01 January 1970 3,675 4 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

Why can't make aluminum nitride film successfully by use sputter?

We use reactive sputtering process to make aluminum nitride film, and want to make c-axis aluminum nitride film on a silicon substrate, but the crystal orientation cannot be seen with...

03 March 2021 7,975 3 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

How do I determine the degree of polymerization of PEG 400 based on NMR integration?

Hello, I am working on the photocatalytic degradation of PEG 400. I would like to know if it's possible to determine the degree on polymerization based on NMR integration, or by the MW of the...

02 March 2021 6,186 3 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

Ester cleavage conditions?

Hi all, I need to cleave the ester in Ethyl 2-amino-1H-imidazole-5-carboxylate to make the carboxylic acid and retrieve the product from solution to use in downstream applications of linking to...

01 March 2021 8,766 3 View

How to check the uv-vis absorption of nanoparticle by surface plasmon resonance?

I try to check the uv-vis absorption of Indium nanoparticle. Now I am measuring in solution, can I measure it in the form of a film?

01 March 2021 930 3 View

Can polymer concentrations be calculated based on the number average molecular weight?

Hello, I spin-cast two different polymers onto wafers and measure their height as a function of initial concentration. For polymer A, I have the weight-average molecular weight (Mw) as well as...

28 February 2021 7,882 2 View

1 nm thick MgO thin-film to be deposited on Si wafer using thermal evaporation. What will be the optimum deposition conditions?

Favourable conditions of base pressure, rate of deposition. Also, by which characterisation technique to be used to verify the thickness of the deposited film.

28 February 2021 3,640 3 View

POlymer+DMSO solution and moisture??

What could be the reason of moisture at the sides of Vial when I am preparing my polmyer+DMSO solution for membrane fabrication? What etiquettes I am possibly missing here?

28 February 2021 6,516 5 View