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Dipeptide-SWCNTs-based Supramolecular Hybrid Hydrogel
Subhasish Roy*

Prayogic Rasayan 2021, 5(3), 76-81

DOI: 10.53023/p.rasayan-20211111


A dipeptide appended pyrenebutyric acid’s amide forms hydrogel at basic pH with an estimated minimum gelation concentration of 0.29 % w/v. The hydrogel was characterized by using various microscopic and spectroscopic techniques. The gelator molecule itself can disperse pristine-single walled carbon nanotubes (SWCNTs) in basic aqueous medium and it can also form a hybrid hydrogel with SWCNTs. Fluorescence, morphological and rheological properties of the hybrid hydrogel were different from the native hydrogel.

Biopolymer-based Films and Coatings: Emerging Technologies to Extend Shelf-life of Fruits and Vegetables
L. Susmita Devi, Manashi Das Purkayastha, Avik Mukherjee, Santosh Kumar*

Prayogic Rasayan 2021, 5(3), 82-91

DOI: 10.53023/p.rasayan-20211211


Numerous published reports have demonstrated that biopolymer-based films and coatings can effectively reduce weight loss, and postharvest decay such as biochemical and microbial spoilage of coated fresh fruits and vegetables resulting in their postharvest shelf-life extension by a few days to as long as a month. This review is a comprehensive account on applications of biopolymer based active, composite coatings and films for sustainable packaging of fresh produce.

A short review on synthesis of dihydrophenanthrene, phenanthrene and its analogues by palladium-catalyzed reaction
Mitali Dewan, Rathin Jana*

Prayogic Rasayan 2021, 5(3), 93-101

DOI: 10.53023/p.rasayan-20211214


Use of transition metal compounds or complexes as catalysts or reagents in organic synthesis is an exciting field in research and numerous novel reactions which are impossible to achieve by conventional synthetic methods have already been discovered. Palladium catalysed C-C bond forming reaction is very important for the synthesis of carbocyclic compounds. In this mini review we have reviewed of some efficient methods for the construction of a dihydrophenanthrene, phenanthrene and its analogues by palladium-catalyzed reaction.