ZnS oxidizes to ZnO!!why??

when I put my ZnS solution in the chemical bath, the ZnS oxidizes so there are ZnO peaks appearing because of the reaction with the oxygen in the air, despite the fact that I close the beaker...

14 February 2021 5,778 9 View

Are any database collected cell penetrating anticancer peptides ?

Dear researchers, Anticancer peptides(ACPs) with cell-penetrating properties can enter to cytoplasmic space of cancer cells and induce cell death. but, I could not find the database that...

29 January 2021 707 3 View

What to do with this Gaussian Convergence error?

Hi! I'm kind of a beginner with computational chemistry and I\m trying to study the interaction between copper ion and a graphitic carbon nitride quantum dot. the calculation converges with HF but...

02 January 2021 8,684 5 View

Can anodizing of stainless steel 304 make its surface non-electrical conductive?

Anodizing of SS304 creates a thick oxide layer on that. Is this layer non-electrical conductive? What thickness should be obtained in order to make the surface non-electrical conductive?

01 January 2021 3,359 4 View

How can psychoanalysis make solution for social issue?

how can we use psychoanalytic perspective for describing, meaning, understanding and solving social problems(such as ethical problems, political problems, ...)?

27 December 2020 9,314 13 View

Who is to be cited in the research/review articles?

When an author want to cite the work/idea/theoretical model/results/facts for publication purpose, who should s/he cited (giving citation credit)? (a) the first author (pioneer) who...

09 November 2020 6,929 3 View

What is the best method to zoning and classify the biomes, and ecoregions in a province?

Hi everyone What is the best method to zoning and classify the biomes, and ecoregions in a province? How is it done? I look forward to your valuable answers. Thank you

06 November 2020 5,614 11 View

Is there any advantage on adsorption process to be done at solution pH near to 7 (neutral)?

Generally, it has been reported that some of the adsorption phenomena are of pH dependent. Some studies have shown that the effective removal of contaminants from wastewaters/aqueous media can be...

04 November 2020 8,852 5 View

How can I do y-scrambling( y-randomization) to test the developed machine learning-based model ?

Dear researchers : y-randomization is one of the special tests of machine learning approaches. I want to evaluate my developed machine learning-based models, to predict active peptides, by...

26 October 2020 1,196 2 View

Which type (kind) of water is suitable for preparation of agar media for microbiological purposes?

Between tap water, distilled water, double distilled water and deionized water, which one is mostly recommended to be used to prepare agar media for microbiological purposes?

25 October 2020 6,093 34 View

How optimize the Size Exclusion Chromatography?

Hello! I'll do a size exclusion chromatography, but I only have an open column, and I'll perform the peptide extraction from yeast, using buffer lysis (sodium phosphate 50 mM/NaCl 30 mM/DNAse and...

01 March 2021 2,215 2 View

No title

01 March 2021 3,905 5 View

What test should I use to compare two or three means, if data is not normally distributed but sample size is > 30 in each group?

I personally feel this as a most confusing question. As per my understanding, if sample size is > 30, and sample is skewed, we can still use paramteric approach, as it will follow Z...

01 March 2021 1,587 6 View

Is it necessary to report effect size (ES) in statistics of biomedical research given that we already report p values routinely?

Pls share your thoughts

01 March 2021 7,330 4 View

Why there are two peaks while using the mie plot of Silver nanoparticle?

Hi, I am trying to learn the theoretical modelling of silver nanoparticle using the Mie scattering theory. After that, I discovered a software named Mieplot developed by Philip Laven, where it...

25 February 2021 7,493 6 View

How to calculate Z (the number of molecules in a unit cell) for calculating theoretical density?

I am trying to calculate the theoretical density of my ceramics materials. I use the formula below to calculate the theoretical density: Theoretical density = (Molecular weight x No. of molecules...

24 February 2021 3,823 2 View

How to handle studies which report perfect effect sizes in a meta-analysis using Pearson's r?

I'm in the process of updating a meta-analysis and in one of the new studies, effect sizes are reported as Tau-U. Two of the effect sizes are reported as Tau-U = 1.00. I am using Andy Field's...

24 February 2021 2,265 3 View

Sample size determination for non-parametric tests?

How do I run a a priori sample size determination for non-parametric tests, like the Mann-Whitney U-test and the Kruskall-Wallis or other non-parametric tests that accord with the unpaired t-test...

24 February 2021 166 6 View

How to determine a priori sample size for t-test with unequal means?

I need to conduct a a priori sample size determinations for t-test with unequal means, but I don't know the sizes of the groups nor the ratio of both groups... Can I do a sample size determination...

24 February 2021 8,289 3 View

What are alternatives to factor analysis for a small sample?

My sample size is too small to conduct a factor analysis. I created my own psychometric scale for measuring Effectiveness of Support, which contains 38 items (4 sub-scales) Im really struggling...

23 February 2021 9,287 12 View