I am synthesizing chalcone derivatives using 0.5ml 15M NaOH catalyzed Claisen Schmidt condensation. My product is all gummy. Any suggestions on how to resolve?
Hello, I hope everyone reading this is doing well during these tough times. I am doing my masters in business management and considering dissertation topics. I'm interested in taking an...
15 February 2021 594 26 View
I have images that I need to explain the color of the picture
02 December 2020 373 2 View
Does anyone have Matlab code to filter images? I am working to built modeling to image process that i need to filter image which show me clear to picture ,I can know the parameters of defect
02 December 2020 6,434 4 View
I have performed this reaction many times by using acetic acid as a solvent bt no cyclization occurs to form imide.
05 March 2020 6,051 3 View
acid can be converted into anhydride by sublimatiom?
05 March 2020 8,313 2 View
Dear colleagues, I have "leaf Area" measurements using the "LI-3100 Area meter" of cotton plants from different stages on June, July, August and September. The planting distance is 15 cm between...
12 February 2020 1,583 3 View
Hi I prepared a nanocomposite cathode LSCF-GDC and extracted its conductivity/resistivity data from Hall Effect Measurement System at room temperature. I am looking for a published paper, thesis...
18 December 2017 5,266 3 View
I am looking for a Post-Doctor position in Europe, USA or Canada for two years or more. Please if you have any suggestions or you have a position to offer you may contact me by e-mail :...
01 October 2017 5,145 1 View
I am trying to assess BTB integrity. Most articles show experiments with Biotin Tracer. But incase of Blood brain barrier Evans blue or albumin is used often. Why in case of BTB biotin tracer is...
27 September 2016 1,337 3 View
Basis/Principles of the signal secuences predictions
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Hi good day to everyone! I am actually studying the gel content of synthetic latex. Refer to ASTM 3616, gel content is measure of insoluble rubbers in the chosen solvent. So, I just would like to...
07 February 2021 605 4 View
Hello Everyone, I have done a uniaxial test on rubber and data (attached with the post) has been used in Abaqus to get YEOH's coefficient. But I am getting a warning that it is unstable? Can...
04 February 2021 5,975 3 View
Hello everyone, I am trying to model a damper in ABAQUS. I have obtained hyperelastic properties using a uniaxial tensile test and viscoelastic properties by relaxation test conducted in the...
09 January 2021 4,515 1 View
Hello Everyone, I have Time Domain DMA data of rubber i.e. loss modulus and storage modulus varying with time with constant 1 hz frequency. I need to convert it into prony coefficient. I need to...
09 December 2020 5,211 3 View
The correct combination of ingredients must be used in rubber formulation. Is there another means to prevent discolouration other than reformulating compounds?
03 December 2020 8,960 3 View
As of now, I am trying to explore the potential of using high/very high-resolution satellite imagery with machine learning (ML) to identify or map forest cover (e.g. rubber). As a newbie in this...
17 November 2020 7,187 3 View
All of the alkyd sample from rubber seed oil I have synthesized is always black in colour, such colour is not good for the production of white oil paint. I need help on what to do to achieve...
10 October 2020 9,860 1 View
I study the relation between the amount of sulfur of rubber compounds and the chemical resistance of rubber compounds to prepare rubber compounds using for lining acid contained.
14 September 2020 8,229 3 View
I have dehydroleucodine (DHL) and parthenolide (PTL) in powder form. This powder was left at -4C for a year. When the powder is redissolved in ethyl acetate or methylene chloride it rapidly forms...
02 August 2020 3,173 4 View
Hello, I can't understand why a low yield is obtained with the use of HCl in aldol condensation in acid catalysis for the synthesis of hydroxychalcone.
28 July 2020 7,853 5 View