Can randomization be done after we get our data?

Let's say that we are doing an online survey among a group of people with the same profession - cross-sectional study. The population size identified, and sample size calculation is done. And...

26 August 2020 3,511 5 View

Hi. Anyone have come across this issue where the baseline is shifted like this when running the hplc? Is it due to contamination or else?

Mobile phase used is 5mM sulphuric acid , type of column is Bio-Rad Aminex

09 July 2020 9,321 7 View

Hi. Do you have any idea why the peak looks like that as I guess this is the solvent peak produced?

I have run the levulinic acid standard through hplc-refractive index detector with column and detector temp at 63 and 50 degree respectively. Mobile phase used is 0.005 M H2SO4 at flow rate 0.6...

12 November 2019 6,348 2 View

Can waterbased acrylic emulsion cause corrosion?

I've purchased a waterbased acrylic emulsion to be used on metal. However, after applying this coating on my carbon steel, the steel corrode immediately. I've been doing some reading and...

21 October 2019 4,790 3 View

Do we need to add alcohol (ex: ethanol) if we used acid catalyst in sol-gel method?

Currently, i'm preparing my nanosilica via sol-gel method, but the nanoparticle's size obtained is >100nm. I'm using TEOS as a precursor, acetic acid as catalyst and water as hydrolyzing agent....

02 October 2018 9,901 8 View

What is the best way to reduce the motility of Rotifer?

26 August 2016 7,679 3 View

I need to image mesoporous silica nanoparticles that are in ~100 nm size and do high resolution TEM to look at mesopores. what grids should I use?

Need to image mesoporous silica nanoparticles using the TEM. Also, need high resolution TEM images to see the mesoporous structure. Kindly suggest what kind of grids to use. Thanks, Shatadru

02 March 2021 1,787 2 View

12% ledeburitic cold work tool steel, etched for revealing retained austenite, any help for clarifying?

Hello everyone. Given microstructure image belongs to a 12% ledeburitic cold work tool steel (annealed and tempered). The sample was etched with picral (100 mL ethanol and 4 g picric acid). I...

02 March 2021 4,119 3 View

Is there a powerful system for the security of the systems distributed on IoT systems?

Is there a powerful system for the security of the systems distributed on IoT systems?

02 March 2021 3,858 10 View

What is Nano technology with coronavirus helpe the human..and is it nano mterals removal of covid19?

I anwar by adsorption or reaction ..but it is either more method...

02 March 2021 4,811 2 View

How to compare different concentrations of nanoparticles for characterization from ICP-MS?

I took measurements of different concentrations of 15 nm and 5 nm Au nano particle solutions. I'm trying to determine which concentration I measured gives the best reading overall. I also...

02 March 2021 7,626 1 View

How Relativistic effects is one reason for lanthanide contraction?

The Lanthanide contraction which is the decrease in ionic radii of the elements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, is due to poor shielding of the 4f...

01 March 2021 2,272 4 View

Can chitosan alone can act as a reducing agent for Cu(0) nanoparticle sythesis?

[Synthesizing Cu nanoparticles without using chemical reductants]

01 March 2021 8,359 1 View

What are the new 2D nanomaterials were used for Silver nanoparticles stabilization?

In the stabilization of AgNPs are vital in current research interest. However, some of the 2D nano-materials like graphene oxide, MoS2, etc... previously used to stabilize it. But still they shown...

01 March 2021 2,207 3 View

What is the state of the drug inside solid lipid nanoparticles (SLNs)?

I am a little confuse with the mechanism of solid lipid nanoparticles (SLNs). The main point of encapsulating drugs into SLNs is because some drugs have low solubility in water. Therefore, SLNs...

01 March 2021 3,703 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