Publications by authors named "Vajiravelu Sivamurugan"

The waste management of polyethylene terephthalate (PET)-derived polyester (PES) textile is a global issue, and material recovery through chemical recycling can restore a circular economy. In our investigation, microwave-induced catalytic aminolysis and glycolysis of PES textile wastes using Ag-doped ZnO nanoparticles have been proposed. Ag-doped ZnO is prepared by the sol-gel method and characterised by XRD, FT-IR, UV-Vis, SEM-EDX and TEM.

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Azo dyes are highly toxic, which acts as a notable mutagen and carcinogen. This has a significant effect on human health, plants, animals, aquatic and terrestrial environments. Thus, the degradation of the azo dyes is exclusively studied using the conventional methods of which biodegradation is an eco-friendly approach.

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Though it was once known that upregulated Cannabinoid Receptor (CB1) and downregulated Fatty Acid Amide Hydrolase (FAAH1) are associated with tumour aggressiveness and metastasis, it is now clear that upregulated CB1 levels more than a certain point cause accumulation of ceramide and directs cells to apoptosis. Hence, CB1 analogues/FAAH1 blockers are explored widely as anticancer drugs. There are reports on CB1-agonists and FAAH1-blockers separately, however, dual activities along with ovarian cancer-specific links are not established for any natural compound.

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Article Synopsis
  • - The paper discusses the discovery of a unique high molecular weight monorhamnolipid from the bacterium Pseudomonas guganensis, different from the commonly studied di-rhamnolipids, which are usually linked to hydroxydecanoic acids.
  • - Isolation and characterization techniques, including FT-IR, GC-MS, and NMR, were used to analyze the compound, revealing its potential for degrading hydrocarbons like n-hexadecane.
  • - The study suggests that this bacterium creates a circular relationship by using n-hexadecane to produce rhamnolipids, which subsequently helps in further degrading hydrocarbons, indicating its potential as a bioemulsifier for cleaning polluted waters.
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We investigated the electron transport in Co-Pd ferromagnetic nanoparticles (Co 16%) cross-linked with oligo(phenyleneethynylene)diethanethiolate, which consists of three rotary phenylene moieties bridged by two acetylene groups, or icosane-1,20-dithiol, which consists of one alkane chain. Although the nanoparticles cross-linked with the alkane dithiols (the latter) have extremely high electrical resistance in electron transport, the resistance of the nanoparticles cross-linked with the conjugated molecules (the former) demonstrates a linear temperature dependence from room temperature to ca. 20 K; below that temperature, it has a weak temperature-dependent residual contribution with a resistance minimum around 7 K.

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The magnetic dipole-dipole interaction between nanomagnets having huge magnetic moments can have a strength comparable to that of the van der Waals interaction between them, and it can be manipulated by applying an external magnetic field of conventional strength. Therefore, the cooperation between the dipole-dipole interaction and the applied magnetic field allows the magnetic moments of nanomagnets to be aligned and organized in an ordered manner. In this work, a network of magnetic nanoparticles connected with flexible long-alkyl-chain linkers was designed to develop a "magnetic sponge" capable of absorbing and desorbing guest molecules with changes in the applied magnetic field.

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The present investigation delineates the synthesis of hexa-peri-hexabenzocoronene capped gold nanoparticles. The coronene derivative has been synthesized by cyclotrimerisation of carbazole and thioanisole bearing alkyne to form 1,2,4-substituted isomer and coplanarised through a Scholl reaction. AuNP with 3-5 nm size and narrow distribution were synthesized using coronene derivative as the capping agent.

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