Why the melting entalphy of samples of PP-g-MA is different but the peaks observed by XRD are very similar, how can be explained it?

The difractograms not show a variation of the intensity of the peaks, but the melting enthalphy obtained by DSC is changing with the AM grafted into PP.

10 November 2017 5,299 4 View

Which are the new tendencies in polymer materials research?

Read 1 answer by scientists to the question asked by Edwin A. Murillo on Mar 2, 2017

02 March 2017 8,095 1 View

How can make the integration of the peaks in a NMR spectrum by using the origin program?

03 April 2016 5,593 2 View

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By DSC analysis the polymer only shows a Tg

01 February 2016 5,953 4 View

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When I put the stress for a period of 600 s. After that I remove the stress, the rheometer take values of compliance or in the methodology have I add another parameter?

01 February 2016 9,906 1 View

How can I quantified the proportion of a phenol and formaldehyde employed on the synthesis of a resol?

I need to find the molar ratio of these materials in a final resol.

31 December 2015 3,739 3 View

Why one sample A presents higher complex viscosity than a sample B, but the behavior in a shear viscosity is opposite?

This behavior was exhibited by thermoplastic polymer functionalized on molten state

11 December 2015 4,238 9 View

How can I export results on a Zetasizer nanoseries (nano Z)?

I need to obtain quickly this information, but when I make clik in file and then on export results not appear the information required to obtain the plot

07 August 2015 3,316 7 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

Is CD44 degraded in lysosome together with hyaluronan after CD44 mediated endocytosis of hyaluronic acid?

Also when RHAMM binds hyaluronic acid, they get internalized, will RHAMM also be degraded? Or both CD44 and RHAMM will be transferred back to the cell membrane? Asking for breast cancer cell line...

01 March 2021 8,169 2 View

I want to performe MALDI-TOF MS for bacterial identification, I would appreciate it if anyone can tell me the matrix solution preparation protocol ?

based on what I've studied on multiple papers, for peptide and protein identification Alpha-cyano-4-hydroxycinnamic acid (CHCA) is an appropriate matrix to use, I also know that the CHCA powder...

26 February 2021 6,799 3 View

Can I use acetic acid with an ELITE WAX Perkin Elmer column for Gas Chromatography?

Hi! I would want to know if I can use acetic acid with an ELITE WAX Perkin Elmer column for Gas Chromatography. This column has a polyethylene glycol phase, but I can't find the manual to check...

22 February 2021 730 2 View

Can you perform the Murexide test on samples fixed in Formalin?

I have a fixed sample and would like to use the murexide reaction to test for uric acid composition. I no longer have fresh samples

22 February 2021 1,328 1 View

Is there an ideal incubation time of RGO-modified SPCE before subsequent use, i.e., electrochemical characterization or further modification?

I notice that upon washing and air-drying of my RGO/SPCE surface and characterizing again via DPV, the current response towards ferricyanide probe significantly decreases. My worry is that the...

22 February 2021 5,324 3 View

What is the best etching method for Mg-Ca alloy?

I have used Picral etchant (4.2 g Picric acid, 10 mL Acetic acid, 70 mL Ethanol, 10 mL distilled water) but it didn't work. Is there any alternative?

21 February 2021 2,558 5 View

Protocol for membrane extraction E. coli?

Hello! I am interested in determining whether a poly-unsaturated fatty acid I have engineered E. coli to produce is being incorporated into the membrane of the cells or if it is simply a free...

21 February 2021 7,447 2 View

What is the stability of 2 3-dihydroxyquinoxaline in acidic water?

I'm developing a UHPLC assay, and the fluorescent product is 2,3-dihydroxyquinoxaline. The reaction to produce this requires hydrochloric acid (about 1.2 M). Will storage in this acidic...

20 February 2021 5,820 4 View

Antibody amino acid sequence database to simulation?

Hello, I need your help. I am looking for a database of antibody amino acid sequences for later simulation in a program in order to analyze their structure. The antibodies I need to test...

18 February 2021 371 4 View