Arpita Dey

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Questions related from Arpita Dey

How can one identify phytochemicals from the HPLC retention time and peaks in absence of standards?

Is MS or NMR recommended for further elucidation? Or, is there any standard library available and accessible?

06 February 2022 7,731 4 View

What protocol/method should be followed to determine ROS production during antibacterial assays?

How can we know the ROS production when we treat bacterial cells with an antibiotic agent?

29 December 2021 3,484 5 View

How antibacterial action of nanoparticles are affected by size and shape of the nanoparticles?

What is the role of size and shape of nanoparticles in their antibacterial activity? What is the mechanism of antibacterial action of the nanoparticles? And how does it depend on the target organism?

11 November 2021 3,094 9 View

Aggregation of metal nanoparticles

We synthesized metal and its oxide nanoparticles using plant-derived extract as a reducing agent without adding any surfactant. Highly crystalline NPs have formed as inferred from XRD and other...

01 January 1970 8,723 10 View

How are green synthesized metal/metal oxide nanomaterials (NMs) different from NMs prepared by physical and chemical methods?

In plant-based green synthesis, we use phytochemicals from plant extracts as reducing and/or capping agents. It helps to minimize or avoid the use of hazardous precursor reagents. Do...

01 January 1970 2,526 11 View

Sample preparation for GC-MS for phytochemicals analysis

What is the best protocol for preparing an extract from plant parts for GC-MS analysis? Shall we use mid-range polar solvents and/or solvents in the lowest polarity to the highest polarity range?...

01 January 1970 8,041 8 View