A5081873440- Hydrocarbon exploration and reservoir analysis
- Plant Diversity and Evolution
- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Geochemistry and Geologic Mapping
- Petroleum Processing and Analysis
- Plant and animal studies
- Geological Studies and Exploration
- Coal and Its By-products
- Plant and Fungal Species Descriptions
- Plant biochemistry and biosynthesis
- Coal Properties and Utilization
- Fossil Insects in Amber
- Geological formations and processes
- Atmospheric and Environmental Gas Dynamics
- Geological and Geochemical Analysis
- Natural product bioactivities and synthesis
- Insect and Arachnid Ecology and Behavior
- Ecology and Vegetation Dynamics Studies
- Meat and Animal Product Quality
- Pleistocene-Era Hominins and Archaeology
- Microbial bioremediation and biosurfactants
- Evolution and Paleontology Studies
- Metabolomics and Mass Spectrometry Studies
- Collagen: Extraction and Characterization
Indian Institute of Technology Bombay
2015-2024
Jai Narain Vyas University
2018
Environment and Climate Change Canada
2015
Massachusetts Institute of Technology
2012-2013
Forschungszentrum Jülich
2005-2007
Dibrugarh University
1999
Melanin is a ubiquitous biological pigment found in bacteria, fungi, plants, and animals. It has diverse range of ecological biochemical functions, including display, evasion, photoprotection, detoxification, metal scavenging. To date, evidence melanin fossil organisms relied entirely on indirect morphological chemical analyses. Here, we apply direct techniques to categorically demonstrate the preservation eumelanin two > 160 Ma Jurassic cephalopod ink sacs confirm its similarity modern...
Infection of the genitourinary tract with Group B Streptococcus (GBS), an opportunistic gram positive pathogen, is associated premature rupture amniotic membrane and preterm birth. In this work, we demonstrate that GBS produces vesicles (MVs) in a serotype independent manner. These MVs are loaded virulence factors including extracellular matrix degrading proteases pore forming toxins. Mice chorio-decidual membranes challenged ex vivo resulted extensive collagen degradation leading to loss...
Abstract Insect faunas are extremely rare near the latest Cretaceous with a 24-million-year gap spanning from early Campanian to Eocene. Here, we report unique amber biota Upper (uppermost ~72.1 Ma) of Tilin, central Myanmar. The chemical composition Tilin suggests tree source among conifers, indicating that gymnosperms were still abundant in equatorial forests. Eight orders and 12 families insects have been found so far, making it known diverse insect assemblage Mesozoic. presence ants...
The evolution and diversification of ancient megathermal angiosperm lineages with Africa-India origins in Asian tropical forests is poorly understood because the lack reliable fossils. Our palaeobiogeographical analysis pollen fossils from Africa India combined molecular data fossil amber records suggest a tropical-African origin Dipterocarpaceae during mid-Cretaceous its dispersal to Late Maastrichtian Paleocene, leading range expansion aseasonal dipterocarps on Indian Plate. India-Asia...
Abstract Recent studies have suggested the presence of keratin in fossils dating back to Mesozoic. However, ultrastructural revealing exposed melanosomes many fossil keratinous tissues suggest that should rarely, if ever, be preserved. In this study, keratin's stability through diagenesis was tested using microbial decay and maturation experiments on various structures. The residues were analysed pyrolysis‐gas chromatography‐mass spectrometry compared unpublished feather hair published fresh...
The terpenoid compositions of the Late Cretaceous Xixia amber from Central China and middle Miocene Zhangpu Southeast were analyzed by gas chromatography-mass spectrometry (GC-MS) to elucidate their botanical origins. is characterized sesquiterpenoids, abietane phyllocladane type diterpenoids, but lacks phenolic abietanes labdane derivatives. molecular indicate that most likely contributed conifer family Araucariaceae, which today distributed primarily in Southern Hemisphere, widely occurred...
The sedimentary sequence containing lignite deposits in Gurha quarry of the Bikaner-Nagaur Basin (Rajasthan) has been investigated. samples from and allied shale horizons were evaluated for petrographical, palynological, palynofacies organic geochemical inferences, to depict source flora reconstruct palaeodepositional conditions prevailed during sedimentation. An assessment hydrocarbon generation potential these also made. results revealed dominance huminite macerals phytoclasts matter (OM)...