http://irgu.unigoa.ac.in/drs/handle/unigoa/5626 2026-05-13T14:26:17Z http://irgu.unigoa.ac.in/drs/handle/unigoa/7860 Comparative evaluation of plasma-assisted and photochemical advanced oxidation processes for p-nitrophenol degradation in water Vaigankar, C.; Gaude-Agadyekar, V.; Kakodkar, E.; Kunkalekar, R.K.; Joshi, N. The present study examined the degradation of p-nitrophenol (PNP), a hazardous and long-lasting nitroaromatic contaminant commonly found in industrial wastewater, through a comparative analysis of various treatment methods utilizing CuO-Fe sub(2)O sub(3) mixed oxide catalysts. The effectiveness of adsorption, photocatalysis, photo-Fenton oxidation, catalytic ozonation, plasma treatment, and plasma-assisted catalytic oxidation was thoroughly evaluated under controlled settings. Among the evaluated catalysts, the C3 (CuFe sub(2)O sub(4)) catalyst exhibited the highest adsorption capacity and catalytic efficiency, facilitating the effective degradation of PNP via various advanced oxidation processes. Photocatalytic degradation under UV light resulted in significant PNP removal, whereas the UV-H sub(2)O sub(2)-catalyst system achieved nearly complete degradation (98-100 percent) within 10 min, owing to enhanced hydroxyl radical (.OH) generation via combined photolytic and catalytic processes. Catalytic ozonation further boosted degradation efficiency by facilitating the surface-mediated decomposition of ozone (O sub(3)) into reactive oxygen species. Plasma treatment produced several oxidizing agents, including O sub(3), nitrite (NO sub(2-), nitrate (NO sub(3)-), hydrogen peroxide (H sub(2)O sub(2)), and reactive radicals, which accelerated the oxidative degradation of PNP. This comparative assessment underscores the synergistic effect of catalyst-assisted radical generation in accelerating pollutant degradation and offers insights into selecting appropriate advanced oxidation methods for effectively treating nitroaromatic pollutants in water. 2026-01-01T00:00:00Z http://irgu.unigoa.ac.in/drs/handle/unigoa/7859 S-alkylated pyridyl-linked oxadiazole thione derivatives: Synthesis, dual Alpha-amylase/Alpha-glucosidase inhibition, and anti-inflammatory evaluation Shruthi, N.R.; Das, B.V.; Kamat, V.; Akki, M.; Barretto, D.A.; Poojary, B.; Venugopala, K.N. In type II diabetes mellitus, inhibition of the enzymes Alpha-amylase and Alpha-glucosidase is an effective strategy for managing postprandial hyperglycemia. Given the therapeutic significance of Alpha-amylase and Alpha-glucosidase inhibition, this study reports the synthesis of twelve S-alkylated pyridyl-linked oxadiazole thione derivatives from 2-chloronicotinic acid via a multistep synthetic route, evaluated as potential antidiabetic agents, which have been well characterized by FT-IR, sup(1)H/ sup(13)C NMR, and mass spectroscopic techniques. The synthesized compounds were docked with target proteins Alpha-glucosidase (PDB: 3L4Y) and Alpha-amylase (PDB: 4GQR). All synthesized compounds were assessed in vitro for their inhibitory activity against Alpha-amylase and Alpha-glucosidase, along with their anti-inflammatory potential. Compound 6f showed excellent Alpha-amylase and Alpha-glucosidase, and 6g showed anti-inflammatory properties among all the screened compounds. 2026-01-01T00:00:00Z http://irgu.unigoa.ac.in/drs/handle/unigoa/7842 Comments on "growth mechanism and physicochemical properties of L-threonine silver nitrate (LTSN) single crystal for frequency doubling and optical limiting applications" Petrosyan, A.M.; Srinivasan, B.R. The authors of a recent publication (Moses et al. in: J. Mater. Sci.: Mater. Electron. 37:307, 2026) report having grown and studied a new crystal "L-threonine silver nitrate" (LTSN) by the slow evaporation solution growth method. In this letter to the Editor, many points of criticism concerning the synthesis and characterization of the so-called LTSN crystal are described to prove that it is a material of unknown composition. 2026-01-01T00:00:00Z http://irgu.unigoa.ac.in/drs/handle/unigoa/7815 On the Existence of Triglycine Acetate, Triglycine Phosphate, Triglycine Oxalate and Triglycine Formate Petrosyan, A.M.; Srinivasan, B.R. The authors of a recent paper (Cryst. Res. Technol. 2022, 57, 2100130) report to have grown crystals of triglycine acetate (TGAc) by slow evaporation of an aqueous solution containing glycine and acetic acid in 3:1 molar ratio. The infrared spectrum and unit cell data of the so-called TGAc crystal confirm that it is, in fact, Alpha-glycine. The non-formation of any TGAc is due to no chemical reaction occurring between glycine and acetic acid. Another publication (Cryst. Res. Technol. 2022, 57, 2100262) describes the growth and characterization of a so-called triglycine oxalate (TGO) crystal. The unit cell data and infrared spectrum of the TGO crystal reveal that the crystal grown is, in fact, the well-known glycinium hydrogen oxalate. A critical analysis of the publications reporting on the growth of triglycine phosphate (TGP) and triglycine formate (TGF) crystals reveals that these are not what the authors claim them to be. Despite their names, the TGAc or TGP or TGO or TGF crystals are not analogs of the triglycine sulfate (TGS) crystal but serve as examples to highlight the importance of single-crystal structure refinement to avoid improper characterization. 2025-01-01T00:00:00Z