Why is starch maleate pale yellow in color?

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Can anyone explain the observation of starch agglomeration in 1-ethyl-3-methylimidazolium acetate?

I am trying to dissolve starch(1wt.% w/w) in 1-ethyl-3-methyl imidazolium acetate (>97% purity, impurity

08 September 2017 9,034 2 View

Can DMSO in sample injections of 10 micro-litre volume harm a C-18,(200*4.6mm),Silica HPLC Column?

I have been trying to analyze 5-Hydroxymethylfurfural from starch.For this,I have to use DMSO to get good product selectivity,a halide catalyst and an ionic-liquid[EMIMCl/BMIMCl] to make the...

07 August 2015 9,066 10 View

How can I separate most of the DMSO from water-ionic liquid mixture by fractional crystallization?

I am using DMSO,water-IL and solid catalyst to synthesize HMF and managed to extract most of it from reaction media with diethyl ether.Following this,I am left with the spent catalyst+ionic liquid...

07 August 2015 8,500 6 View

How should I proceed to dissolve starch in water?

To dissolve starch in DMSO is a viable option but I don't know the approach and the associated physico-chemical changes that may happen in the starch.

03 April 2015 2,358 7 View

Alternative to mediation analysis?

I am currently working on my dissertation and want to explore the role of competence as a mediator between the effect of colour of clothes on voting intention (focus on Western countries)....

21 February 2021 8,609 1 View

Color of spiro-ometad film?

What does the color of a spiro-ometad film indicate? I got purple, green, red, even black color of the spiro film. Is there anything we can get from the preliminary color analysis(e.g. oxidation...

21 February 2021 1,831 4 View

Any information about dinitrosalisylic acid reagent end point color stability ?

I work on estimation of alpha amylase activity using dinitrosalisylic acid reagent If i put the reagent to stope the enzymatic reaction and allow the reagent to react with the produced reducing...

17 February 2021 7,402 4 View

Negative result on natural product sample cholinergic assay?

i have been doing cholinergic assay on natural product and for some of the samples, i get negative value for the inhibition activity. can anyone help me explain the meaning of the negative value...

17 February 2021 4,118 1 View

Has anyone performed a colorimetric RT-LAMP assay using Lucigens LavaLAMP kit?

Hi there, my lab recently opted to use LavaLAMP from Lucigen instead of the Warmstart kit from NEB. However, Lucigen has yet to create a colormetric kit for RT-LAMP, and adding phenol-Red (pH...

17 February 2021 5,399 1 View

What is the actual chemistry going on between iodate and ascorbic acid?

I am studying biochemistry at university, as part of the course we do several titration experiments. In our handouts, we were given the following half equations: IO3- + 6H+ + 4e- I+ +...

16 February 2021 8,731 1 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 anyone have a stack of images of action potentials or abnormal brain scans?

I need a stack of black and white .jpeg/.tiff/.jpg/.png images across time of either action potentials, neurons firing, or brain scans (comparing disease and normal brain, disease progression,...

09 February 2021 2,648 3 View

I am looking for a postdoc. Can anyone guide me in this respect?

My PhD thesis entitled as "Anticarcinogenic activity of Terpenoid containing plants against induced Hepatocellular Carcinoma (HCC). My extensive experimental work critically examined the potential...

08 February 2021 8,628 3 View

Did anybody use VISIONlite ColorCalc Software for liquid samples color analysis?

I would like to read about your experiences in the measurement of the color of liquid samples (wine, oil, or whatever) using a glass cuvette to calculate L* a* and b* parameters with the...

08 February 2021 6,619 4 View