Polyhydroxyalkanoate Production by Methanotrophs: Recent Updates and Perspectives.

Methanotrophs are bacteria that consume methane (CH) as their sole carbon and energy source. These microorganisms play a crucial role in the carbon cycle by metabolizing CH (the greenhouse gas), into cellular biomass and carbon dioxide (CO). Polyhydroxyalkanoates (PHAs) are biopolymers produced by various microorganisms, including methanotrophs.

Appraising the factors favouring uranium mobilization and associated health risk assessment in groundwaters of north-western India.

An attempt has been made in this study to evaluate the factors favoring the uranium mobilization into the groundwater of Northwest India using uranium isotope activity ratio (U/U), radon (Rn) and environmental isotopes of water (H, O and H). The values range from 23 - 597 µg/L for total uranium and 634-3210 Bq/m for radon and the corresponding annual effective dose is estimated to be 18.9-490 µSv/a and 6.

Unravelling 30 ka recharge history of an intensely exploited multi-tier aquifer system in North West India through isotopic tracers - Implications on deep groundwater sustainability.

Northwest part of India is an agriculturally active region experiencing rapid rise in food production and steep decline in groundwater levels. The freshwater requirement is mostly met by regional aquifers which are inherently heterogeneous and undergoing extensive human inducted perturbations. These factors pose great challenge in planning sustainable groundwater management.

Fluoride Geochemistry and Exposure Risk Through Groundwater Sources in Northeastern Parts of Rajasthan, India.

Exposure to fluoride concentrations above a threshold of 1.5 mg/L can cause joint pains, restricted mobility, skeletal and dental fluorosis. This study aims to determine the hydrochemical evolution of the fluoride-rich groundwater and estimate the risk of fluoride exposure to the residents of semi-arid northeastern part of Rajasthan, India.

Distribution and correlation of radon and uranium and associated hydrogeochemical processes in alluvial aquifers of northwest India.

The spatial and vertical distributions of radon and uranium are evaluated in relation to the hydrogeology, geomorphology, and hydrochemistry of southwest Punjab. Radon activity of the groundwater ranges from 580 to 3633 Bq/m (shallow groundwater 580 to 2438 Bq/m and deep groundwater 964 to 3633 Bq/m), and uranium concentration varies from 24.4 to 253 μg/L (shallow groundwater 24.

A study on the role of hydrogeology on the distribution of uranium in alluvial aquifers of northwest India.

A study was undertaken to decipher the uranium distribution in relation to a number of hydrogeological factors in groundwater of southwest Punjab. Existing geological information for the region suggests that the shallow alluvial aquifer extends up to 50-70 m below ground level (bgl) and is in turn underlain by a deeper aquifer which extends to a depth of 250 m bgl. The presence of clayey units limits the vertical mixing of groundwater between the shallow and deep aquifers.

Isotope investigation on groundwater recharge and dynamics in shallow and deep alluvial aquifers of southwest Punjab.

Groundwater samples collected from the alluvial aquifers of southwest Punjab, both shallow and deep zones were measured for environmental tritium (H) and stable isotopes (H and O) to evaluate the source of recharge and aquifer dynamics. The shallow groundwater shows wide variation in isotopic signature (δO: -11.3 to -5.