What's the effect of MgO impregnation over activated carbono on sugar clarification?

I'm trying to clarify sugar modifying activated carbon with diferentes oxides.

04 May 2019 4,530 2 View

I need to obtain an equation for calculation of pure urea in liquid phase. Has someone a refrence? Or a thermodynamic equation for this?

I'm developing a work that needs the density of pure liquid urea. It's liquid when the temperature is higher than 134 oC, but I didn't find references for this property.

10 November 2018 4,043 2 View

How to modulate the surface acidity of a zeolite in a stable manner for testing in gas phase alkylation reactions? Which dopants should be used?

I want to test zeolite catalysts in alkylation reactions for linear C6-C9 alkanes using with several exchanged metals. I want to use only one zeolitic support, but modulating its acidity.

10 November 2018 6,860 7 View

Are there specific models for adsorption / desorption of drugs in porous solids?

In studies of adsorption / desorption kinetics of drugs in zeolites, the kinetic models of 1st and 2nd order as in chemical kinetics give very similar results. Are there specific models for the...

04 May 2018 4,345 7 View

How to differenciate Bronsted acid sites in "nests" from isolated ones?

Is there a characterization technique to differentiate acidic sites of bronsted that accumulate in "nests" of those that are isolated? If so, how to differentiate and quantify them?

03 April 2018 8,076 2 View

Is it correct to use the infrared bands to calculate and monitor the evolution of crystallinity of zeolite gels?

We have prepared zeolites from gels with different aging times. The cristallinity is evaluated from the relationship between the intensity of 550 cm -1 band (ZSM-5) and the intensity of the silica...

02 March 2018 4,853 4 View

We've prepared MCM`s since 1999. There's a decrease of organization of very old calcined mesop. materials, despite of storage free of water. Why?

We have observed the decrease of organization of mesoporous materials that was stored for long periods is notorious. The calcined samples were stored free of water. Samples prepared several years...

02 March 2018 7,345 0 View

Do Ce-Zr solids in fuell cells present good proton conductivity? How to improve this property?

Ce-Zr can be synthesized by simple techniques. Good results in preparation and characterization indicate interesting possibilities.

01 January 1970 6,298 0 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

Precipitate after adding laemmli buffer to protein solution containing Potassium Acetate?

Hi, I am running a size exclusion chromatography experiment with a buffer containing Potassium Acetate as a salt. I analyse these fractions through SDS-PAGE. After boiling my SEC fractions in...

01 March 2021 2,622 3 View

Is it efficient to do liquid biopsy to investigate the gene expressions of the tumor?

To do liquid biopsy and look for specific gene expressions there are so many published papers. Thera are different protocols and procedures used to isolate circulating cell free RNA or mRNA from...

23 February 2021 7,326 5 View

How to prepare electrolyte of NaClO4 salt for Na-ion battery? Any problem with this salt?

Hello, I am trying to make anode for Na-ion batteries. I have no experience with preparation of the electrolyte for any batteries. NaClO4 salt are available and I am planning to use EC:PC as...

21 February 2021 8,132 1 View

Any Homemade Organic Synthesis Practices?

Hi everyone, I am a teacher of Heterocycles Synthesis, Is there a home practice that you recommend for undergraduate students? A simulator would also be useful Due to the pandemic, students...

18 February 2021 2,769 4 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

Has anyone encountered any problems with abm good microRNA primers for quantification of mature miRNAs?

I've been trying to quantitate mature microRNAs in 293T cells with and without 'X'. 2ug of total RNA (isolated by Trizol method) is converted to cDNA using All-in one microRNA cDNA synthesis kit...

17 February 2021 8,986 2 View

How to measure acetic anhydride solution with 18M sulfuric acid?

I am doing research on the synthesis of paracetamol. I am preparing acetic anhydride solution with a few drops a sulfuric acid and wish to measure the pH of this solution. However my pH meter...

14 February 2021 8,699 3 View

Does any one have experience with Autoclavable cell culture media (RPMI 1640/DMEM)? Does it work well?

12 February 2021 2,958 1 View

Best synthesis method for large scale silver nanoparticle synthesis with high yield?.Best post processing steps after nanoparticle synthesis?

I have chemically synthesized silver nanoparticle to combat microbes on wound site. I have used many methods of synthesis, but I found minimal field of silver NP product.I am getting whitish...

11 February 2021 4,964 13 View