What are the useful methods for the hydroxyl content in evoh besides nuclear magnetism?

01 January 1970 0 947 Report

evoh has been unable to dissolve in the determination of nuclear magnetism, the use of DMSO solvent, in addition to nuclear magnetism there is any better method for the determination of hydroxyl content?

Badges
Science topic

Similar topics
Econ
Manufacturing
Industry

More 蔡少康 Cai's questions See All

How to regulate Ransome in criminal law?

Ransomware attack has become a common criminal pattern, but the governance of countries basically focuses on fraud and computer crime. Dear colleagues, I would like to ask you how the definition...

21 May 2024 262 8 View

Why can't the precursor dissolve in THF after removing the end group by AIBN?

I prepare the precursor with both hydroxy and Nitrogenous group on the side chain by RAFT. Then, through the method mentained in the following literature that add AIBN to wipe off the residue of...

11 May 2024 2,941 0 View

Why does EVA alcoholysis product evoh fail to dissolve in DMSO when determining nuclear magnetism?

使用购买的EVA（VA含量40%）产品，在甲苯溶液中溶解，然后添加了氢氧化钠和醇的混合溶液，浓度大概有1mol/l和0.25mol/l的。产品测试红外结果较为正常，但是在DMSO中一直无法溶解，困扰了很久。有没有做这方面研究的大佬可以解答一下或者讨论一下。是否自己合成的EVA再去做EVOH会好溶于dmso一些。

21 December 2023 7,565 0 View

Why does EVA alcoholysis product evoh fail to dissolve in DMSO when determining nuclear magnetism?

The purchased EVA (VA content 40%) product is dissolved in toluene solution, and then a mixture of sodium hydroxide and alcohol is added, the concentration is about 1mol/l and 0.25mol/l. The...

21 December 2023 8,974 3 View

What cause my DNA stuck at the top of my well and why are there 2 lines in between my smear??

I’m currently conducting research on telomeres in THP-1 cells. During my gel electrophoresis experiments using a 1% gel, I’ve encountered an issue where the DNA seems to be stuck at the top of the...

29 October 2023 9,561 7 View

Prepartion of styrene acrylic emulsion?

How to dissolve styrene-acrylic resin pellets(BASF Joncryl684) into a water/1,2-butanediol mixed solution to prepare an emulsion?

29 October 2023 2,745 0 View

Prepartion of styrene acrylic emulsion?

I dissolved the styrene acrylic resin (molecular weight 1500): 1,2-butanediol = 3:5（weight ratio）, added the emulsifier, and then slowly added it to the water containing the emulsifier using a...

27 October 2023 3,341 0 View

Target was not seen in the whole cell lysate but it was seen in the supernatant after IP?

I was recently doing a Co-IP work. And I got some weird result as show in the picture, the target protein was not seen in the whole cell lysate but it was seen in the supernatant after IP. The...

30 August 2023 7,220 0 View

I would like to ask a question about COMSOL coils, How to set up comsol to make it run?

I simulated a copper coil in comsol, applied a pulse excitation current to the coil, and set a probe around the coil to measure the potential. I used the mef module and transient research, but it...

03 July 2023 3,955 2 View

Is it possible to prepare polymethylmethacrylate from methacrylic acid and methanol monomers?

29 May 2023 2,903 1 View

Which solvent is better to dissolve with secondary metabolites extracted from fungi?

I work on MCF7 cell cell for anticaner purpose and I wa to do drug preperation the drug ( secondary metabolites extracted from Aspergillus) My question which solvent is better with these secodary...

03 August 2024 4,725 2 View

How to correctly use the UTE and ZTE pulse sequences in Bruker's ParaVision software?

I am using a Bruker 600M solid-state NMR spectrometer with a Micro 2.5 microimaging system. The test sample is a tube of 1M LiCl aqueous solution, and the nucleus detected is 1H. I am trying to...

01 August 2024 9,227 1 View

I need to dissolve stigmasterol for an animal experiment, it hasn't dissolved in either DMSO or vegetable oil. Can anyone recommend the best solvent?

Hello everyone, I need to dissolve stigmasterol for an animal experiment, but it hasn't dissolved in either DMSO or vegetable oil. Can anyone recommend the best solvent for stigmasterol?

01 August 2024 7,504 2 View

IHC profiler in image j software. has anyone used it to quantify nuclear DAB positivity?

Dear researchers. I tried using the IHC PROFILER in image j to quantify nuclear DAB staining. I followed the instructions in the original article by "Varghese F, Bukhari AB, Malhotra R, De A...

29 July 2024 2,229 0 View

How many events should be counted for the analysis of apoptosis with nuclear staining with Hoechst 33342 whit microscopy ?

Greeting How many events should be counted for the analysis of apoptosis with nuclear staining with Hoechst 33342 whit microscopy ? Are 100 events count sufficient and three repetitions for...

25 July 2024 7,520 0 View

What is the suitable solvent of MIL-100 for chemotherapy?

I synthesised a nanocarrier by conjugation MOF (MIL-100) with folic acid for use in chemotherapy but the samples didn't dissolve completely in aqueous solution or DMSO. Instead, they only...

19 July 2024 8,522 0 View

How Can I Resolve a Persistent Unwanted NMR Peak at 1.25 ppm?

Hello everyone, I am facing a consistent issue in my NMR spectra with an unwanted peak appearing at 1.25 ppm. This peak seems to vary with the amount of sample: it becomes more pronounced with...

15 July 2024 9,065 4 View

Kraft lignin and MMA(Methyl meth acrylate) free radical polymerization for synthesis of thermoplastics?

I am conducting free radical polymerization using Kraft lignin and MMA, with DMSO serving as the solvent and there is also an initiator. Following the reaction, I obtain a solution, but I am...

15 July 2024 9,827 1 View

Regarding solubility of Dorsomorphin in DMSO ?

I'm using Dorsomorphin (C24H25N5O) as one component in dual SMAD inhibition of pluripotent stem cells to differentiate into neurons alongwith SB431542. Now as to solubilizing 10mg SB in DMSO for...

11 July 2024 4,832 0 View

What are the criteria that must be retained for the development and validation of a qualitative NMR method ?

Dear Community, I would like to develop and validate a qualitative NMR method for the analysis of a specific category of chemicals, and my question is the following: What are the criteria that I...

08 July 2024 1,402 4 View