Methylaluminoxane Reactivities and Anionic Structures: From Small Oligomers to Large Sheets.

The structure and reactivity of small methylaluminoxane (MAO) species (MeAlO)n(Me3Al)m (n = 1-8) have been investigated using DFT (M06-2X), MP2, and CCSD(T) calculations. This hierarchy of methods reveals that DFT artificially stabilizes structures containing 4-coordinate oxygen atoms while higher-level calculations demonstrate a clear preference for structures with 3-coordinate oxygen and 4-coordinate aluminum centers. Analysis of ionization pathways shows these neutral MAO molecules form anions through either methide or Me2Al+ abstraction, with the latter mechanism dominant for sheet structures (n = 5-8).

Cytomorphological Spectrum of Hepatic Lesions on Ultrasonography (USG) or CT-Guided Fine-Needle Aspiration Cytology (FNAC) in a Tertiary Care Centre, Rajendra Institute of Medical Sciences (RIMS), Ranchi, Jharkhand, India.

Background Ultrasonography (USG)-guided fine-needle aspiration cytology (FNAC) of the liver is a primary diagnostic procedure for primary and metastatic hepatic lesions. Despite histopathology being the gold standard, the outcomes of ultrasound-guided fine needle aspiration cytology are encouraging. Aims and objective The purpose of the study is to determine the diagnostic utility of ultrasonography (USG) or computerized tomography (CT)-guided FNAC in the detection of liver lesions, to investigate cytomorphological patterns of liver lesions identified by guided FNAC, and, wherever feasible, to correlate FNAC diagnosis with histopathology and imaging modalities.

Sporosarcina hypophthalmichthys sp. nov. Isolated From Gastrointestinal Tract of Fish Hypophthalmichthys molitrix (Valenciennes, 1844).

A rod-shaped, motile, Gram-stain-positive bacterial strain RKN2, was isolated from gut of silver carp (Hypophthalmichthys molitrix) residing in Gobindsagar reservoir, Himachal Pradesh, India. Having the greatest sequence similarity to Sporosarcina koreensis F73 (98.51%), Sporosarcina luteola Y1 (98.

Challenges and effective tracking down strategies of antibiotic contamination in aquatic ecosystem.

A growing environmental concern revolves around the widespread use of medicines, particularly antibiotics, which adversely impact water quality and various life forms. The unregulated production and utilization of antibiotics not only affect non-targeted organisms but also exert significant evolutionary pressures, leading to the rapid development of antimicrobial resistance (AMR) in bacterial communities. To address this issue, global studies have been conducted to assess the prevalence and quantities of antibiotics in various environmental components including freshwater, ocean, local sewage, and fish.

Unveiling the ecotoxicological impact of microplastics on organisms - the persistent organic pollutant (POP): A comprehensive review.

Microplastics have been ubiquitous in our environment for decades, and numerous studies have revealed their extensive dispersion, reaching far beyond the surface of the land, soil, aquatic ecosystems. They have infiltrated the food-chain, the food web, even the air we breathe, as well as the water we drink. Microplastics have been detected in the food we consume, acting as vectors for hazardous chemicals that adhere to their hydrophobic surfaces.