Identifying the sources and variability of atmospheric aerosols is essential to understanding their impact on climate, air quality, and the health of living beings. Here, an attempt has been made to determine the sources and seasonal and interannual variability of aerosols over the monsoon dominated region of Mangaluru. At the ground surface, the daily mass concentration of dust ranges from 0.94 to 89.6 µg m⁻3, with an annual mean of 22.8 ± 15.8 µg m⁻3. In contrast, black carbon (BC) concentrations range from 0.12 to 2.74 µg m⁻3, with a mean annual value of 0.82 ± 0.59 µg m⁻3. A significant increasing trend in AOD is observed, with percentage changes per decade estimated using linear regression applied to the seasonal mean AOD time series, showing the strongest increase during winter (≈32.8
An eco-friendly and efficient route for synthesizing reduced graphene oxide (rGO) using Mimosa pudica leaf extract as a green reducing and stabilizing agent is reported. To address the limited understanding of structure–property relationships in green-synthesized rGO, a systematic study is performed. Analysis of graphene oxide (GO) and rGO using XRD, FTIR, Raman, and XPS confirms effective deoxygenation and restoration of sp2 domains. The spin-coated thin films of Mimosa pudica leaf extract reduced graphene oxide (MP-rGO) exhibit increased conductivity with a sheet resistance (Rs) of 373 ± 18 kΩsq−1 and high optical transmittance of 93.61
In this study, a nanocomposite hydrogel containing dextran (Dex), 4-acryloylmorpholine (AcM), 2-amido-2-methyl-1-propanesulphonic acid (AMPS), and silver nanoparticles (SNPs) was made by a microwave-assisted free radical polymerization method. The material was characterized by advanced analytical techniques and evaluated as a vehicle for the oral co-delivery of 5-fluorouracil (5-FU) and cisplatin (CPT) in cancer treatment. The drugs were encapsulated in the matrix from an aqueous solution. Subsequently, a release study was performed in pH 1.2 medium, as simulated gastric fluid and in pH 7.4 medium, as simulated intestinal fluid. The drug encapsulation efficiencies were 84.1
A green synthesis method was adopted in this work to formulate the copper oxide nanoparticles (CuONPs) from locally procured coffea arabica leaves. The synthesized CuONPs were combined with graphene nanoplatelets (GNPs) and then electrochemically polymerized with aspartic acid (AA) to develop a poly (aspartic acid) layered copper oxide nanoparticles-graphene nanoplatelets composite sensor (PALCGCS) to analyze vanillin (VN) in food samples by voltammetric techniques like cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Energy dispersive X-ray spectroscopy (EDXS) and X-ray diffraction (XRD) technique revealed the elemental composition and crystallinity of CuONPs. Furthermore, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) was employed to analyze and compare morphological and electrochemical features of PALCGCS and bare copper nanoparticles-graphene nanoplatelets composite sensor (BCGCS). The incorporation of CuONPs in the electrode material has evidently contributed to the augmented anodic current response. The modified sensor displayed high sensitivity towards VN with a limit of detection (LOD) of 0.05 µM and 0.16 µM in the linear range of 0.1 µM − 1.0 µM and 1.0 µM − 3.0 µM, respectively. Moreover, to validate the applicability, the designed PALCGCS was effectively employed in the detection of VN in various VN containing food stuffs.
The concentration of 222Rn in groundwater samples was analysed in the Gogi region of Yadgiri district, Karnataka, South India, an area known for its uranium mineralisation and for future mining activities. A total of 210 samples were analysed from various zones, with Gogi as the common centre for all study zones. The 222Rn bubbling method was employed to determine the activity concentration of 222Rn, which varied from 0.6 to 275.0 Bq/L. The concentration of 222Rn in most groundwater samples was comparable to levels observed in other parts of India and worldwide. The observed 222Rn activity concentration for the core zone was found to be higher than that in the other two zones. Only 10
