NMR peaks of PSS in D20?

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Measuring thickness of thin layers from QCM

how can you measure thickness of deposited films from QCM data?

05 June 2017 6,280 3 View

Problems with synthesizing PLL-OEG-Maleimide?

I am trying to synthesize PLL with OEG (30%)and Maleimide(20%) but for some unknown reasons I am not able to. Once I did manage to get the product but the obtained product had such low amount of...

01 February 2017 671 3 View

About semiconductor equation derivations

I want to derive the Poisson equation in respect to OFET so I need some suggestions for books where I can find the basic derivation of these semiconductor related equations. Any suggestions?

11 December 2016 5,350 2 View

Is the SiO2 thin film deposited on Si wafer negatively charged? or positively charged?

I want to know the charge property of the thin film of SIO2 deposited by plasma etching on Si wafers.

09 October 2016 6,093 2 View

Why the membrane of the silicon nitride nozzles are being cracked?

I have been working with nozzles made from silicon nitride wafers for biomedical applications. Recently i am facing a problem, after the substance is being sprayed from the nozzle, its sticking to...

08 September 2016 1,593 1 View

How two melting peaks in DSC of polypropylene can be merged into one crystallization peak?

The figure shows DSC cooling (blue) and 2nd heating (green) curves (step: 10 K/min) for a commercial sample supplied as Atactic Polypropylene (APP). The heating curve illustrates two major...

03 March 2021 5,857 3 View

How do I determine the degree of polymerization of PEG 400 based on NMR integration?

Hello, I am working on the photocatalytic degradation of PEG 400. I would like to know if it's possible to determine the degree on polymerization based on NMR integration, or by the MW of the...

02 March 2021 6,186 3 View

Do you know any MR image dataset?

I would like to research on MR images (0.5T and 3T). Can you please suggest some websites that I can download dataset including both 0.5T and 3T MR images? Thank you.

02 March 2021 7,735 3 View

Issues with Permeabilization during Flow Cytometry?

Hello Everyone. Currently I am working to characterize macrophages in the myocardium after ischemia-reperfusion injury in rats. Due to the low total cell number isolated from rat hearts I can...

01 March 2021 3,867 3 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

What is the state of the drug inside solid lipid nanoparticles (SLNs)?

I am a little confuse with the mechanism of solid lipid nanoparticles (SLNs). The main point of encapsulating drugs into SLNs is because some drugs have low solubility in water. Therefore, SLNs...

01 March 2021 3,703 3 View

What do I do with DLS peaks that are from the buffer?

I'm looking at the aggregation of my protein sample using DLS. Unfortunately, my buffer (20mM HEPES) also results in a set of peaks. These are at approximately 1 and 1000 d.nm. The lowest peak...

01 March 2021 9,015 2 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

Why is the sum of the elements in a row in a Q matrix equal to zero?

When explaining substitution models, the substitutions are expressed as Q matrix. Why is the sum of the elements in a row zero?

28 February 2021 3,864 3 View

What could be some reasons why unstimulated monocytes are getting activated?

Im doing PBMC isolation -> CD14+ enrichment using magnetic beads -> stimulation setup. My negative control is just cells in cRPMI but they seem to get activated over and over again.

28 February 2021 7,883 3 View

Anthony Foris

You might want to check out "NMR and FT-IR studies of sulfonated styrene-based homopolymers and copolymers" by Jin Chuan Yang, et al., Polymer, Volume 43, Issue 19, 1 September 2002, Pages 5125-5132. The homopolymers studied included sodium poly(styrene sulfonate). I do not have access to the full article, and do not know if it shows an actual NMR spectrum of NaPSS. Good luck in your research. AF.