Kishore Mallela

37 Questions 28 Answers 0 Followers

Questions related from Kishore Mallela

My polymer is glassy solid yet stuck to whatmann fiter paper. how can I obtain my polymer?

I precipitated the polymer in methanol and then tried to filter the polymer. However, my polymer stuck to whatman filter paper. how can I obtain the polymer now?

09 September 2018 462 2 View

I was not able to isolate the product from the DMSO . Please help me how to do it?

I want to synthesize the exo norbornene alcohol as was described in the reference.Macromolecules 2005, 38, 9455-9465. the problem is that I was not able to remove the DMSO solvent. Please help me...

07 July 2018 4,011 3 View

Is silica gel soluble/partially soluble in acetone?

we need to purify the pyrrolidone derivatives. When we checked the TLC, the compound Has Rf of 0.6 in acetone. But other solvents showed no movement of the spot from the base line. However, when I...

06 June 2018 2,432 3 View

Can I dry macromonomers with Norbornene end cap at 120 degrees centigrade for 4 hours?

I synthesized polymers of PEO with different molecular weights with Norbornene end cap. I want to dry the sample in order to perform for the Ring Opening Metathesis Polymerization. Can I dry my...

06 June 2018 2,361 4 View

Can we really trust the procedures published in the scientific journals?

I found that many procedures reported in the journals are not reproducable even when same conditions are maintained? why is it so?

11 November 2017 1,940 2 View

How to prepare 1, 1-Dipheynylmethyl Potassium ?

I want to prepare DPMK initiator for my polymerizations. Please give me a pdf file of the journal necessary.

09 September 2017 494 4 View

Is the refractive index of both monomer and polymer same?

i want to synthesise the polymer with refractive index contrast.

08 August 2017 4,422 4 View

How to remove moisture from the polyethers?

I synthesized polyethylene glycol. I need to remove moisture from the polymer. T tried freeze drying but it didn't work please suggest me some other method which removes moisture. Thanking You in...

08 August 2017 2,493 9 View

Please let me know about the good practical books for learning glass blowing techniques.?

glass blowing for Schlenk techniques

04 April 2016 1,025 2 View

What is the weight of the polymer 'polyisoprene' with a molecular weight of 10000?

please help me in calculating the weight of the polyisoprene whose molecular weight is 10000.

03 March 2016 1,048 0 View

Can anyone help me in converting micromolar concentration into ppb and ppm?

Please explain in detail so that I can figure out the calculation with full knowledge.

03 March 2015 10,056 9 View

Will histidine be affected by the buffer's sulfate group in HEPES and CHES buffers?

I want to do analytical tests regarding histidine in buffer systems. So if sulfate groups interact with histidine, please mention how I can avoid the problem.

02 February 2015 6,852 1 View

What is the pH range for BSA in which it does not unfold?

BSA is used in spectral studies i need to observe the BSA properties in folded state...

01 January 2015 1,900 4 View

How to dissolve aromatic peptides ?

I want to find the role of aromatic aminoacids in peptides.

01 January 2015 2,126 5 View

Do histidine, tryptophan and arginine amino acids degrade faster than others ?

I prepared peptides containing histidine, tryptophan and arginine amino acids and the next day when i measured the properties their properties are gone and not at all retained. I stored the...

01 January 2015 1,045 2 View

How do I theoritically calculate the absorbance of benzamide?

Does the amine group in benzamide has an effect on the absorbance of benzene?

01 January 2015 7,101 0 View

Can anyone help me in synthesis of secondary amine on solid phase?

please help me giving references as well as the suggestions.

12 December 2014 6,563 3 View

How can I remove acetic acid from water when the product contained is an aromatic amine?

i want to separate my product which is aromatic amine from acetic acid which is used as solvent . i used about 20ml of the acetic acid as solvent.

11 November 2014 5,565 15 View

What happens when Boc deprotection is done in a closed system in the case of solid phase synthesis?

I want to synthesize peptides in solid phase synthetic methods.

11 November 2014 2,484 5 View

Can orthoamino phenylboronic acid form amide bond with acid functionalized compound?

I want to synthesize the orthoamino phenylboronic acid derivatives.

10 October 2014 7,350 2 View

Can I use 150 mM NaCl solution to directly avoid cell rupture in aqueous solution ?

I want to do cell assays in buffer conditions and cells should not rupture .

10 October 2014 5,516 3 View

How do you prepare a Cu(I) solution for analytical assays?

I need to prepare a copper solution with a Cu(I) state.

10 October 2014 3,571 9 View

How to disrupt a beta sheet in buffer conditions near physiological pH?

I need to form and disrupt the beta sheets just by adding some external agent.please give me detailed work references and some help from your experiences as well.

10 October 2014 6,086 7 View

Can you comment on the use of peptides used as catalysts for organic reactions and the role of each amino acid in those peptides?

I want to us peptides as catalysts in organic reactions.

10 October 2014 8,467 1 View

Can anybody help me in doing experiment with Tetraphenylethene moiety used for labelling short peptide in UV titration?

When I labelled the peptides with tetraphenylethene and used them for titration with interacting biomolecules, the UV spectrum was showing very big noise some times and some times it was fine. I...

09 September 2014 8,667 1 View

What kind of side reactions does arginine derivative undergo?

I am using unsaturated moiety attached to the arginine amino acid

09 September 2014 4,824 1 View

Can beta sheets be formed with short peptides (say a tripeptide) ?

in need of short peptides to form beta sheets.

09 September 2014 1,543 5 View

Why don't the peptides synthesised based on the binding sites present in proteins behave the same way in solution phase?

I want to design peptides probes with fluorescent moieties labelled for detecting biomolecules.

08 August 2014 3,715 3 View

How can I explain the ratiometric response of TPE fluorophore?

I want to design a ratiometric sensor with Tetraphenylethene (TPE)

08 August 2014 1,594 2 View

What are the main reasons for the UV-Visible spectrum to occur below the zero value even though there is fluorophore present in the analyte?

I am trying to do titration based on the UV-Visible spectrometry.

08 August 2014 1,051 6 View

Does the cation-pi interactions really exist in the solution phase?

I want to investigate the cation -pi interactions, so that they can be used as required.

08 August 2014 3,894 4 View

Is there any website dedicated to explain how to handle each reagent especially those chemicals that are moisture sensitive?

i need to do many moisture sensitive reactions please give me the links of the websites that offer clear cut explainations on how the moisture, air and other enviromentally affected chemicals are...

01 January 1970 8,577 2 View

I want to remove moisture from the 18-crown-6 crown ether. Can anyone help me with the drying process?

I want to use 18-crown-6 as a complexing agent to the cation during the polymerization process. For this I need it to be moisture free.

01 January 1970 9,759 3 View

Can anyone help me with the deposition of potassium metal in required reactor?

Hello, I want to do the anionic polymerization using the potassium metal. However the potassium metal is not pure enough to be used as initiation system. please help me in the deposition of the...

01 January 1970 3,803 1 View

Can I use Alkoxide initiators for the anionic polymerization in high vacuum techniques?

I want to use alkoxide initiators for the polymerization of styrene. Can i use high vacuum techniques for the sodium alkoxide initiators.

01 January 1970 5,415 2 View

Can anyone give me PDF files of the glass blowing techniques?

I need to construct various glass apparatus fopr anionic polymerization. I couldn't find any texts through scifinder and google please help.

01 January 1970 2,400 0 View

How to remove inhibitors and impurities in the chemicals so that the become suitable for reactions?

I want to perform the metal catalyzed reactions. So can anyone list how the impurities affect the reactions which are metal catalyzed.

01 January 1970 6,535 3 View