How to recrystallization amine compound and it is not soluble in common organic solvents ?

How to recrystallization amine compound and it is not soluble in common organic solvents ?

19 January 2021 671 3 View

What is the ACTUAL COST OF A PUBLICATION??

Hi. It's 2021 January. Recently, I got to know that Elsevier has converted around 160 journals into some "Transformative Journals" and follow the recommendations under "Plan S"...

19 January 2021 9,985 2 View

What if an author has concluded wrong facts in his article and published in Elsevier ?

The question is that in what form of publication we can show true facts and prove the wrong facts invalid ?

29 December 2020 9,727 7 View

What is the difference between filler and fiber?

Explain in correct manner

28 December 2020 5,199 2 View

What should be done if someone 100% copied our article and published in a predatory journal ?

28 December 2020 8,982 10 View

Advantages and Disadvantages of Submitting Article in Special Issues of a Journal ?

What are those ?

21 December 2020 7,757 4 View

What is U matrix for Hosking & Wallis discordancy test based on L-comoments?

Hello everyone I would compute Hosking & Wallis discordancy test based on L-comoments for multivariate Regional Frequency Analysis. Please help me by answer to these questions. 1- Is that...

28 November 2020 8,152 2 View

In microscopy why "smaller the aperture, greater the depth of field"?

12 October 2020 3,636 2 View

How is the resolution of an image affected by the NA of the lens in microscopy?

NA= Numerical Aperture

12 October 2020 2,514 2 View

Which will have a larger Depth of Field: A Light Microscope or an Electron Microscope? Why/How?

The depth of field is the range of distance along the optical axis in which the specimen can move without detectable loss of sharpness.

11 October 2020 4,623 2 View

Logistical regression using SPSS for a dichotomous dependent variable, with an independent variable of 1, 2, 5 and 10 seconds?

I have an experiment with 28 participants The independent variable is the times 1, 2, 5, and 10 used as the cross hairs during a task These 4 times were tested using 4 different blocks, each...

03 March 2021 9,692 2 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

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 there a deep reason for using the squared modulus of the wave function as the probability density of the existence of the particle?

I think we were all surprised at the first time we got to know quantum mechanics that the squared modulus of the wave function is the probability density of the existence of the particle? The role...

28 February 2021 6,282 9 View

How could I process data in RCT to include it in meta-analysis?

I'm in the process of doing a meta-analysis and have encountered some problems with the RCT data. One of my outcom is muscle strength. In one study, I have three different measurements of muscle...

25 February 2021 7,603 3 View

Is it mandatory to specify Subjects Combinations in Generalized Linear Mixed Models (SPSS)?

Hi all, I have data with two levels: lets think of the classic example of students and schools. When running the analysis in SPSS and selecting the Random Effects, we can select (we can or we...

24 February 2021 7,379 4 View

ANCOVA controlling baseline in RCT - how to perform power analysis and sample size estimation?

Hi, I have a simple question. I am hoping to perform a power analysis/sample size estimation for an RCT. We will be controlling for baseline symptoms, and using post-treatment or change scores as...

19 February 2021 2,648 23 View

Small displacement measurement in vacuum?

Hello, I have a question. there is a circular thin foil which vibrates in vacuum, the foil restricted and moves up and down. it is like a diaphragm between two pipes . both sides are in vacuum but...

18 February 2021 8,075 3 View

How to predict the reaction pathway for electro organic synthesis?

Can anyone recommend some any software/models available that can predict substance reactivities and the reaction yield under a specific set of reaction conditions process and proposing pathways to...

17 February 2021 2,383 3 View

What is the best temperature to coat an ELISA plate?

Hello, I want to control the temperature of my ELISA plate during incubations to get consistent results. In general, what is the best temperature to coat the plate with antibody? I have been...

16 February 2021 2,377 7 View