Purification, structural elucidation and anticancer activity of a compound extracted from Aspergillus fumigatus strain MF-1.

The fungus is a great source of secondary metabolites which may possess various biological activities for the treatment of human diseases and disorders. The present study aimed to identify the secondary metabolites from Aspergillus fumigatus strain MF-1 using analytical techniques (chromatographic and spectroscopic). The instruments includes H-NMR, C-NMR, DEPT, COSY, HMQC, FTIR and UV-Vis spectrophotometer were employed to study the extracted compound and the produced compound is 2,5-dioxocyclopentylamino-7-oxohepta-1,3,5-trienyl-2,5-dihydroxy-3-chlorophenyl-2,4,6-trimethyldeca-2,4-dienamide.

Hazardous heavy metals in the pristine lacustrine systems of Antarctica: Insights from PMF model and ERA techniques.

A comprehensive study was presented on the ecological risk, distribution, and quantitative source apportionment of heavy metals in the selected lacustrine systems of Schirmacher Hills using various environmental indices and methods. A total of 25 sediment samples from 16 lakes were collected around scientific research stations and analyzed for metals. Geochemical approaches and ecological risk assessment methods were implemented to characterize and evaluate the contamination level and associated risk in the lacustrine systems.

Photocatalytic degradation of polyethylene plastics by NiAlO spinels-synthesis and characterization.

Over past twenty years, daily usage of Microplastics (MPs) and their pollution are gradually increasing. Especially, the polyethylene bags were used for food storage. So their productivity as well discarding after use are rapidly growing and shown their great impact on the environment.

Fabrication of multifunctional TANI/CuO/Ag nanocomposite for environmental abatement.

During past decade, the ternary nanocomposite is ubiquitous in nanotechnology. Herein, a simple fabrication of cuprous oxide (CuO) and silver (Ag) nanoparticles into Tetraaniline (TANI) matrix by in situ-polymerization approach to attain Tetramer-Metal Oxide-Metal (TANI/CuO/Ag, shortly TCA) ternary composite was reported firstly. The synthesized materials were further characterized by a series of instrumental techniques to understand its structure, morphology and thermal properties.

Facile simultaneous synthesis of tetraaniline nanostructures/silver nanoparticles as heterogeneous catalyst for the efficient catalytic reduction of 4-nitrophenol to 4-aminophenol.

Nanocomposites of tetraaniline (TAN) nanostructures/silver nanoparticles (Ag NPs) were synthesized by an interfacial polymerization method using -phenyl-1, 4-phenylenediamine (NPPD), AgNO and ammonium persulphate (APS) as monomer, oxidizing agent in immiscible solvent toluene-water respectively. The structure and morphology of the as-prepared TAN and Ag NPs were investigated by UV-visible spectroscopy, Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and thermogravimetry (TG). The results of FTIR spectroscopy confirmed the formation of TAN and Ag NPs and those of XRD showed the presence of the face centred cubic (fcc) phase of Ag NPs.

Hydrogeochemistry of the deglaciated lacustrine systems in Antarctica: Potential impact of marine aerosols and rock-water interactions.

The deglaciated lacustrine systems in Grovnes, Larsemann Hills, East Antarctica was assessed for its solute dynamics and hydrogeochemical interactions. These pristine high latitude lacustrine systems serve as a natural laboratory to understand the interaction between hydrosphere, lithosphere and atmosphere thus providing valuable insights on the functioning of major biogeochemical cycles. A total of 14 fresh water lakes were identified and the water samples were analysed for its physico-chemical characteristics.