Explain in details how to prepare a solution of Chitosan in hydrochloric acid.
try to use 1% glacial acetic acid and it will dissolve, just keep it overnight
I have calculated the peak area from the XPS data. From this data how can I calculate the wt% of the material.
14 July 2024 6,951 1 View
I did some column tests in my lab where I needed to detect the DOC fractions using LC-OCD. For the abiotic columns I used sodium azide to restrict the biofilm formation. I did LC-OCD to detect the...
07 July 2024 468 0 View
I am trying to simulate the above truss in Abaqus to get its natural frequencies through Modal Analysis. The joints are connected through welding. However, I am unsure how to define the...
04 June 2024 4,071 1 View
I am trying to infecting huh 7 cell with plasma derived HCV but the infection cannot be established. Has anybody tried infecting any cell line with virus derived from plasma/serum?
03 April 2024 4,685 0 View
The so-called secular equation for a plane wave in piezoelectric medium can be written as f(c,α)=0. (and sometimes f(c,α,ω)=0). It is written in the literature that "for a given apparent wave...
06 February 2024 9,386 0 View
Can you please share one heart-touching picture ever taken or any picture that touched your heart deeply ?
08 January 2024 2,941 5 View
When I was acquiring half of my sample as live cells and half fixed, I used to get 30% positivity and now when Im taking the whole sample as live cells only, it increased to 90%. What is the...
19 December 2023 9,249 0 View
I have been working on the quantitative analysis of plant extract. For the determination of TPC and TFC I have taken four extracts hexane, ethyl acetate, methanol and aqueous. I was able to...
13 December 2023 7,671 4 View
Hello !! I am trying to purify a secreted protein from Expi293 cells and was expecting a cleaner Ni-NTA elution profile unlike what I got (attached picture). Inspite of OD260/280 being >1 -...
18 November 2023 3,219 5 View
Astrology: Is it scientific?
08 October 2023 8,143 5 View
Hello What should be done to separate and identify organic acids in HPC when their RetTime is the same?Like oxalic acid with Propanoic Acid.or acids that have a very close RetTime.
07 August 2024 8,782 3 View
Palmitic acid presence in aqueous fraction
05 August 2024 8,624 4 View
I used humic acid at 0.044 g/kg soil in my pot experiment. But finally, I have to recommend kg/ha. Each pot's soil weight was 11 kg. What is the solution?
02 August 2024 7,186 6 View
I am currently working on a project involving liposomes and need to determine the maximum volume of siRNA that can be added to a 2.5 mL liposome solution with a total lipid concentration of 10...
30 July 2024 6,420 1 View
My final research is about making chitosan/pva hydrogel for wound healing using gelatin as crosslinker. Last month, i made the thin film hydrogel and it turn well. It was okay. Last week, i make...
28 July 2024 2,794 6 View
I would like to know the role of the TFA (trifluoroacetic acid) used on reverse phase chromatography c-18 column. It's is often used with a concentration of 0.1% on the mobile phase.
23 July 2024 8,075 3 View
As mentioned in literature the addition of CaCO3 to MRS Agar media is considered as an indicator for lactic acid producing bacteria, so I wonder if we can add CaCO3 calcium carbonate to any other...
20 July 2024 7,504 0 View
I synthesised a nanocarrier by conjugation MOF (MIL-100) with folic acid for use in chemotherapy but the samples didn't dissolve completely in aqueous solution or DMSO. Instead, they only...
19 July 2024 8,522 0 View
I don't have the anaerobic generators (Anaeropac) so I'd like to try the candle-jar tecnique for the cultive of lactic acid bacteria
15 July 2024 8,890 2 View
15 July 2024 2,414 1 View