Physical-chemical formation of stalactites/stalagmites. what promotes the formation/growth of these structures?

I know, or think I do, the basic idea behind these natural structures, as from what I know they form due to water dripping from the top leaving a salt deposit behind. But started to wonder about...

22 February 2021 1,400 4 View

Can the intensity of this broad band in XRD mask other crystaline phases present?

I obtained a XRD diffractogram with significant broad band at low 2theta levels, also around 30 2theta another smaller broad band appears. It all points out to the existence of an amorphous phase....

19 February 2021 8,414 4 View

How to measure a Neural Network complexity?

Does anyone know how to measure the complexity of an artificial neural network? Could you provide me references? Thanks a lot!

25 January 2021 2,710 10 View

What is the best method for removing power-line interference (PLI)?

In the paper A wavelet-based method for power-line interference removal i... we propose a new method for removing PLI. This method consists in identifying the ECG and noise frequency range for...

29 December 2020 9,233 3 View

Tools for analysis of interaction between lncRNAs and proteins/miRNAs?

Hi! I would like to know what tools I could use to analyze interactions between a new lncRNA and possible protein/miRNA targets. The biggest problem I had to find such tools is that the RNA we...

20 November 2020 8,331 3 View

Should I exclude a paper classified as low quality by the Newcastle-Ottawa tool from a systematic review without meta-analysis?

Hello! I'm working on a systematic review (without meta-analysis) and when evaluating the quality of the papers only one presented low quality. I did not find guidelines in the instrument itself...

04 November 2020 6,564 7 View

When will we have access to Brazilian agricultural censuses microdata publically available? Can Google and Microsoft help it?

Microdata are a wonderful way of analyzing specific issues in an heterogeneous environment. Brazil is wonderfully diverse country, and its countryside is also extremely heterogeneous. We have...

25 October 2020 8,900 2 View

Bioinformatic tools to determine ploidy in microbial genomes?

Looking for tools with proved accuracy to detect ploidy levels in microbial whole-genomes.

14 October 2020 4,273 3 View

Is it possible to use a muffle furnace without N2 atmosphere to make Biochars?

Greetings Everyone. I am reading several articles about biochars and notice several use N2 atmosphere inside the muffle furnace. can you produce biochars without this N2 atmosphere or other inert...

17 August 2020 8,992 6 View

Why Al target are melting at DC Magnetron sputtering deposition?

Dear all, i am depositing pure Al on a DC Magnetron sputtering tool and I am getting melted targets all the time. The target dimensions are: diameter 50mm and thickness 4mm. A bit of historical...

22 June 2020 3,780 1 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

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

How to replicate the well conditions of a crystal hit with 20%(w/v) isopropanol?

I had a crystal hit in a well with 0.1M HEPEs pH 7.5, 10%(w/v) PEG 4000, and 20%(w/v) isopropanol. Why is isopropanol in w/v here if it's just solvent? How do I recreate this well condition?

25 February 2021 9,761 1 View

How to increase solubility of Poly acrylic acid in Dioxane solvent?

I am working with Polyacrylic acid (100.000Da) and instead of water, I need to use another solvent (dioxane) to dissolve PAA. However, because of the high molecular weight, it's quite hard to...

25 February 2021 2,225 5 View