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Questions related from Yasir Iqbal
Hi, I work on natural polymers i.e. gums polysaccharides. the pure materials are normally amorphous , i did a modification on a base material and its xrd showed an improvement and showed a broad...
11 July 2023 4,476 2 View
Hi, I am searching for commercially available nanotechnology based products i.e. in food, agriculture, packaging, health and textile. Thank you
13 March 2023 7,758 17 View
Hi, I have natural polysaccharides and their modified derivatives. I want to test them for antibacterial activity but some of samples are too viscous at 10mg/ml that they don't get into the tip of...
11 December 2021 7,698 7 View
I have prepared hydrogels , I want to determine antibacterial activity. Should I use them In gel form ? or I have also in solid dried powder form. What is the way of sample preparation form them...
11 July 2021 3,397 3 View
Please anyone tell me that how size exclusion chromatography is used in forensic science i.e. what type of analysis are carried out using this technique in forensics?
30 June 2018 8,082 3 View
I'm searching a reproducible method for green synthesis of ZnO nanoparticles by using plant extract as reducing agent which yield solid particles in quantity 1gm,
15 February 2018 3,181 5 View
I want to ask about courses, certifications or something like that is useful along with PhD in chemistry for personal development and knowledge building as well as those which are helpful in...
27 December 2017 485 2 View
Due to narrow peaks I can't see the elements mentioned in starting peaks of spectra. Help me read the spectra just to remove doubts ! Comment below.
19 December 2017 132 7 View
Aoa I have performed Dsc. the picture is attached. kindly help me explain the machine gave the detail under glass transition.. crystallinity id 1069.69 % what does it means ?
26 September 2017 500 5 View
I want to make the comparison graph for XRD analysis As like given in picture that i have uploaded. Kindly tell me a simple way or an easy software to compute my results like this or better ! thanks
25 September 2017 4,270 10 View
the figure show the gc-ms of essentail oil extracted from the seeds and leaves of plant. Guide me how to explain this especially base peak 55 and 97 what do they represent ?ot tell me how to...
27 August 2017 2,348 7 View
I am having trouble in explaning results zeta size have only one peak at 139.7 nm with 100% intensity then why zeta average size is 166nm if 139.7 is with 100% intensity with s.d 32..In zeta...
24 July 2017 5,033 3 View
the the levofloxacin disintegrates in stomach.. Can we make it colon specific by using enteric coating so that it absorption take place in colon??
18 July 2017 6,645 3 View
I carried out the superoxide activity SOD as per protocol and took reading at 560nm on spectrophotometer and similarly took absorbance of POD at 470nm. Now how to calculate SOD and POD values from...
02 July 2017 9,799 2 View
I need a protocol as like we determine tpc,tfc some easy rapid and biochemical method for the determination of vitamin B-6..?
14 April 2017 3,357 3 View
Actually I'm bit confused because there is very narrow difference between these all. Please anyone explain me precisely. Do share your Knowledge and share some useful precise material if availabe....
26 March 2017 7,203 5 View
like the Lambda max of my sample is 294nm in 0.1M 1.2pH HCL soln. If I use HCL soln of 1M or 2M the lambda max will be changed ???
01 March 2017 3,846 3 View
.. I want to check that binder and drug release through the tablets coated by the gum.. Kindly tell me the amount of gum as binder in each tablet. I have studied alot literature they have not...
23 February 2017 3,776 7 View
I am trying well diffusion method but my samples doesn't show antibacterial activities no zone is formed. what could be possible reasons? is there any modification for sample to show...
09 December 2016 123 16 View
i.e In which wavelength range the lambda max of silver nanoparticles must fall either they are produced form any method !
27 November 2016 3,920 9 View
I have DLS zeta sizer available using zeta sizer I want to estimate the molecular weight of my polymer, please tell me an efficient and easy way. I have read a little on some websites that it is...
01 January 1970 8,815 3 View
1.Looking for easy comprehensive and authentic books on analytical chemistry I am already using G.D christian Harris Quantitative chemical analysis Skoog and west I just want to explore some...
01 January 1970 8,979 8 View
Actually im bit confused who the one who gave the concept of nanotechnology for the first time...
01 January 1970 6,294 7 View
Actually my Silver nanoparticle sample was scanned upto 60theta and in that region it gave 2 peaks as reported previously in literature but in almost all literature there are atleast 3 peaks for...
01 January 1970 8,020 5 View
Hi, I did fractionation of my crude methanolic extract and got a hexane fraction strating from non polar to polar. I dried hexance fraction weighed 100mg out of it and resuspened in Hexane added a...
01 January 1970 5,677 6 View
Hi, Experts and Scientists I want to ask what the main characterizations you need to do for hydrogel based on natural polymer ( polymer - metal hydrogel or polymer -metal -polymer).
01 January 1970 1,892 3 View
I did xrd of Sodium alginate powder but received this spectra , is it possible for Sodium alginate to give this spectra ?
01 January 1970 9,589 5 View
