Gouranga Dutta

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Questions related from Gouranga Dutta

Why is the color of hydrogel loaded with CuO NPs shifting from ash black to ash green then blue?

We have prepared a carbopol-based hydrogel laden with CuO NPS for topical wound healing activity. However, after two to three days, the color of the gel changes from ash black to light green, and...

27 May 2023 3,131 2 View

How ZnO NPs shows both antioxidant and anticancer activity?

As we know Anticancer effect is shown because of ROS generation in cancer cell after treating with ZnO NPs, but if same particle having antioxidant properties (to minimize ROS generation in cell)...

05 January 2023 7,847 0 View

Zeta potential of ZnO NPs found -ve, means it's having -ve charge on surface but on XPS analysis confirm presence of Zn2+ ion. Kindly explain?

I did Zeta potential and also XPS for my ZnO nps it that i got potential of -25.6mv. but from XPS analysis it showcasing ZN2+ ions are present.. kindly explain how i have to describe. Thank you

03 December 2022 2,468 7 View

Is the particle size of a metal nanoparticle and the crystalline size of the same metal nanoparticle the same?

My DLS data shows the particle size of my product is 12-15th times bigger than the crystalline size derived from the XRD data. is this normal? please provide some highlights Thank You..

30 October 2022 3,884 8 View

What are the alternative polymer for chitosan with the similar properties? Specifically solubility in acidic conditions?

I want to know any synthetic or natural polymer with same type of acidic conditions solubility of chitosan for drug delivery.

07 October 2022 9,763 7 View

For polysaccharide Polymers like pectin which molecular weight is used for calculating the molar ratio for polymer conjugation synthesis?

The pectin MW showing for monomer is 194.14 g/mol, but in the pectin container, the MW is written 40000-100000. For conjugation synthesis, which MW will be taken to calculate the amount of pectin...

09 September 2022 1,811 2 View