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Geochronological and genetic characterization of basaltic basement from western offshore basins in India

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Geoscience Frontiers 2024年第5期15卷 372-398页

作者： Piyush gupta Shakti Singh Rathore sandeep Singh Geochronology Laboratory KDMIPEOil and Natural Gas Corporation Ltd.9Kaulagarh RoadDehradun 248195India Department of Earth Sciences Indian Institute of TechnologyRoorkee 247667India

^(40)Ar-^(39)Ar geochronology,geochemistry,and Sr-Nd isotopic compositions of 30 core samples from 24 offshore drill wells in the Western offshore basins have been used to characterize the genetics of the volcanic basement from the Kutch,Mumbai,and Kerala-Konkan offshore *** from the volcanic basement rocks demonstrate extremely varied isotopic and geochemical fingerprints,which are suggestive of significantly diverse parent magma compositions and emplacement *** tholeiitic basement from Kutch Offshore basin has Ar-Ar ages that range between 60 Ma and 62 *** basement is characterised by a within-plate basalt signature,with depleted isotopic signatures similar to least contaminated Deccan Traps basalts,and a component of subducted crustal *** basement from Mumbai Offshore Basin has eruption ages between 63 Ma and 65 Ma and show a strong within-plate OIB *** and isotopic signatures are consistent with Renuion lavas and an enriched-end member of Deccan Traps ***,Kerala-Konkan Offshore Basin shows significant E-MORB affinity and is characterized by primitive-mantle signatures and least contamination from the upper continental crust,with ages of eruption between 60 Ma and 61 Ma based on obtained^(40)Ar-^(39)Ar *** study suggests that the Mumbai Offshore Basalts’mode of the eruption was comparable with onshore Deccan volcanism,whereas the basaltic basement in Kutch Offshore was formed after the main phase of Deccan eruption and may have been an offshoot of a"tail"of the main Deccan *** parent magma for the volcanic E-MORB basement in the Kerala-Konkan Offshore Basin is thought to have come from mixing along the Carlsberg Mid-Oceanic Ridge and the material from the Réunion plume with the northward movement of the Indian Plate during the Early *** is thought to have occurred concurrently with the formation of the Chagos-Laccadive Ridge.

关键词： ^(40)Ar-^(39)Ar geochronology Western offshore basins Kutch offshore basin Mumbai offshore basin Kerala-Konkan offshore basin

Current and New Drugs for COVID-19 Treatment and Its Effects on the Liver

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Journal of Clinical and Translational Hepatology 2021年第3期9卷 436-446页

作者： sandeep Satsangi Nitin gupta Parul Kodan Department of Apollo comprehensive Liver Care Apollo HospitalBangaloreKarnatakaIndia Department of Infectious Diseases Kasturba Medical CollegeManipal Academy of Higher EducationManipalKarnatakaIndia Department of Medicine All India Institute of Medical SciencesNew DelhiIndia

Corona virus disease(COVID)-19 is caused by the novel severe acute respiratory syndrome coronavirus-2(commonly referred to as SARS-CoV-2).In March 2020,the World Health Organization declared the COVID-19 outbreak a *** the target organ for the virus is primarily the lungs,with the recent understanding of the pathobiology of this disease and the immune dysregulation associated with it,it is now clear that COVID-19 affects multiple organ *** drugs and therapies have been tried or repurposed to combat the wrath posed by this *** October 22,2020,the USA Food and Drug Administration approved remdesivir for use in adults and pediatric patients(12 years of age and older).Several of the drugs being tried against COVID-19 have hepatotoxicity as their potential side *** review aims to provide the latest insights on various drugs being used in the treatment of COVID-19 and their effects on the liver.

关键词： COVID-19 Drugs Liver Drug-induced liver injury

Early Paleozoic basement diorite of arc-magmatism from Kutch basin, Western India

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Acta Geochimica 2024年第2期43卷 296-307页

作者： Piyush gupta sandeep Singh Shakti Singh Rathore Argha Narayan Sarkar Geochronology Laboratory KDMIPEOil and Natural Gas Corporation Ltd.9Kaulagarh RoadDehradun 248195India Department of Earth Sciences Indian Institute of TechnologyRoorkee 247667India

In this study,we report for theﬁrst time an Early Palaeozoic basement diorite from the drilled well Nirona-A in the Banni Half-Graben of the Kutch basin,western *** 40Ar–39Ar dates provided a plateau age of 441.84±2.66 Ma and another pseudo plateau of 441.28±5.82 to 388.08±16.65 Ma for the basement *** ages constrain the basement formation age to the Late Ordovician-Early Silurian *** obtained basement ages are correlatable with the later part of Cambro-Ordovician alkaline magmatism that has been reported from the Huqf area in Central Oman,whereas their lithological and petrographic correlativity with base-ment diorites occurring in the Dinsi Body of Nagar Parkar igneous complex in Pakistan can also be *** geochemical studies characterized the diorite with enrich-ment of LILE(Rb,Ba,and K)and LREE(La,Ce,Nd),strong depletion of HFSE(Nb,Sr,P,and Ti),along with weakly negative Eu *** geochemical signatures indicate their petrogenetic afﬁliation with mantle-derived magmas,as well as their tectonic setting to be arc-related,having post-collisional continental-arc type afﬁ****440 Ma basement of Kutch,therefore,appears to rep-resent the later thermal event associated with the reworked Neoproterozoic subduction-related suite from Greater India’s northwest edge,which has implications for Gond-wana assembly in the northwest Indian subcontinent.

关键词： Kutch basin 40Ar–39Ar ages Early palaeozoic basement Continental-arc magmatism Calc-alkaline magmatism

Techno-economic and environmental impact analysis of electric two-wheeler batteries in India

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Clean Energy 2024年第3期8卷 147-156页

作者： Aman gupta Ditipriya Bose sandeep Tiwari Vikrant Sharma Jai Prakash Department of Green Energy and Sustainable Development Zakir Husain College of Engineering and Technology Aligarh Muslim UniversityUttar Pradesh-202002India Battery Testing Facility National Institute of Solar EnergyGurugram-Faridabad RoadGwal PahariGurugram-122003HaryanaIndia

This paper presents a comprehensive techno-economic and environmental impact analysis of electric two-wheeler batteries in *** technical comparison reveals that sodium-ion(Na-ion)and lithium-ion(Li-ion)batteries outperform lead-acid batteries in various parameters,with Na-ion and Li-ion batteries exhibiting higher energy densities,higher power densities,longer cycle lives,faster charge rates,better compactness,lighter weight and lower self-discharge *** economic comparison,Na-ion batteries were found to be~12-14%more expensive than Li-ion ***,the longer lifespans and higher energy densities of Na-ion and Li-ion batteries can offset their higher costs through improved performance and long-term ***-acid batteries have the highest environmental impact,while Li-ion batteries demonstrate better environmental performance and potential for ***-ion batteries offer promising environmental advantages with their abundance,lower cost and lower toxic and hazardous material *** recycling processes can further enhance the environmental benefits of Na-ion ***,this research examines the potential of Na-ion batteries as a cheaper alternative to Li-ion batteries,considering India’s abundant sodium resources in regions such as Rajasthan,Chhattisgarh,Jharkhand and others.

关键词： electric two-wheelers environmental impact assessment lead-acid batteries lithium-ion batteries sodium-ion batteries techno-economic analysis

Predictors of Mortality at 28-days in Infection associated Acute Kidney Injury in Cirrhosis

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World Journal of Hepatology 2022年第3期14卷 592-601页

作者： Tarana gupta Naveen Ranga sandeep Kumar Goyal Department of Medicine Pandit Bhagwat Dayal Sharma Post Graduate Institute of Medical SciencesRohtak 124001HaryanaIndia Independent Researcher Kangra 176056Himachal PradeshIndia

BACKGROUND Acute kidney injury(AKI)in cirrhosis is important complication with poor *** infections are common cause for acute *** in cirrhosis lead to acute deterioration of hemodynamics leading to precipitation of *** To study predictors of mortality in patients with infection-associated AKI in *** This was a prospective,observational study conducted at Tertiary care centre from January 2018 till April *** 119 participants with cirrhosis of liver presenting with AKI were included into the *** was defined as per international club of Ascites-AKI criteria *** were grouped into infection AKI and non-infection ***-infection AKI included patients with diuretic induced AKI and pre-renal *** regression analysis was used to determine predictors of mortality at *** Out of 119 patients,alcohol(n=104)was most common etiology of *** infection AKI included 67(56%)patients and non-infection AKI(n=52)included pre-renal AKI in 36(30%)and diuretic-induced AKI in 16(14%)*** AKI had significantly higher bilirubin,higher international normalized ratio(INR),low serum sodium,higher total leukocyte count(TLC)and higher prevalence of hepatic encephalopathy(HE)as compared to non-infection *** AKI had higher progression of AKI(19/67 vs 2/52;P=0.01)and 28-d mortality(38/67 vs 4/5;P≤0.01)as compared to non-infection *** 28-d,non-survivors(n=42)had significantly higher bilirubin,higher INR,low serum sodium,higher TLC and higher prevalence of HE as compared to survivors(n=77).On subgroup analysis of Infection AKI group,on multivariate analysis,serum bilirubin as well as presence of HE were independent predictors of 28-d *** was no significant difference of mortality at 90-d between two *** Infection AKI in cirrhosis has a dismal prognosis with higher 28-d mortality as compared to noninfection *** bilirubin and presence of HE predict

关键词： Infection Acute kidney injury Mortality Cirrhosis Bilirubin Hepatic encephalopathy

Review of current progress in hole-transporting materials for perovskite solar cells

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Journal of Energy Chemistry 2022年第5期31卷 330-386页

作者： Prerna Mahajan Bhavya Padha Sonali Verma Vinay gupta Ram Datt Wing Chung Tsoi Soumitra Satapathi sandeep Arya Department of Physics University of JammuJammuJammu and Kashmir 180006India Department of Physics Khalifa University of Science and TechnologyAbu Dhabi 127788United Arab Emirates SPECIFIC College of EngineeringSwansea University Bay CampusFabian WaySA18ENSwanseaUnited Kingdom Department of Physics Indian Institute of Technology RoorkeeUttarakhand 247667India

Recent advancements in perovskites’ application as a solar energy harvester have been astonishing. The power conversion efficiency(PCE) of perovskite solar cells(PSCs) is currently reaching parity(>25 percent), an accomplishment attained over past decades. PSCs are seen as perovskites sandwiched between an electron transporting material(ETM) and a hole transporting material(HTM). As a primary component of PSCs, HTM has been shown to have a considerable effect on solar energy harvesting, carrier extraction and transport, crystallization of perovskite, stability, and price. In PSCs, it is still necessary to use a *** perovskites are capable of conducting holes, they are present in trace amounts, necessitating the use of an HTM layer for efficient charge extraction. In this review, we provide an understanding of the significant forms of HTM accessible(inorganic, polymeric and small molecule-based HTMs), to motivate further research and development of such materials. The identification of additional criteria suggests a significant challenge to high stability and affordability in PSC.

关键词： Hole transporting material Perovskite solar cells Power conversion efficiency Stability

Down-conversion materials for organic solar cells:Progress,challenges,and perspectives

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Aggregate 2022年第3期3卷 59-79页

作者： Ram Datt Swati Bishnoi Harrison Ka Hin Lee sandeep Arya Sonal gupta Vinay gupta Wing Chung Tsoi Faculty of Science and Engineering Sustainable Product Engineering Centre for Innovative Functional Industrial CoatingsSwansea UniversityBay CampusFabian WaySwansea SA18ENUK Advanced Materials and Metrology Division Council of Scientific And Industrial Research-National Physical LaboratoryDr.K.S.Krishnan MargNew Delhi 110012India Department of Physics University of JammuJammuJammu and Kashmir 180006India Department of Conducting Polymers Institute of Macromolecular ChemistryCzech Academy of SciencesPrague 616206Czech Republic Department of Physics Khalifa University of Science and TechnologyP.O.Box 127788Abu DhabiUnited Arab Emirates

Organic solar cells(OSCs)in terms of power conversion efficiency(PCE)and operational lifetime have made remarkable progress during the last decade by improving the active layer materials and introducing new *** newly developed wide bandgap organic donor and low bandgap acceptor molecules covered the absorption from the visible to the near-infrared *** the incident high energy region(UV)is not in favor of *** absorption causes thermalization losses and photoinduced degradation,which hinders the PCE and lifetime of ***,lanthanide and non-lanthanide-based down-conversion(DC)materials have been introduced,which can effectively convert the high-energy photons(UV)to low-energy photons(visible)and resolve the spectral mismatch losses that limit the absorption of OSCs in high energy incident ***,the DC materials also protect the OSCs from UV-induced *** DC materials were also proposed to cross the Shockley-Queisser efficiency limit of the solar *** this review,the need for DC materials and their processing method for OSCs have been thoroughly ***,the main emphasis has been given to developing lanthanides and non-lanthanides-based DC materials for OSCs,their applications,and their impact on photovoltaic device performance,stability,and future perspectives.

关键词： down-conversion down-shifting lanthanides organic solar cells photostability

Performance analysis of cow dung as an eco-friendly additive material for sustainable moulding and casting

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China Foundry 2019年第6期16卷 423-429页

作者： Manjunath Patel G C Kapil gupta Ganesh Chate Mahesh B Parappagoudar sandeep M Jayashankar Umesh M Daivagna Dept.of Mechanical Engineering PES Institute of Technology and ManagementShivamoggaAffiliated to Visvesvaraya Technological UniversityBelagaviIndia Dept.of Mechanical and Industrial Engineering Technology University of JohannesburgSouth Africa Dept.of Mechanical Engineering KLS Gogte Institute of TechnologyBelgaumAffiliated to Visvesvaraya Technological UniversityBelagaviIndia Dept.of Mechanical Engineering Padre Conceicao College of EngineeringVernaIndia Dept.of Mechanical Engineering Ballari Institute of Technology and ManagementBellaryAffiliated to Visvesvaraya Technological UniversityBelagaviIndia

In the present work,an attempt is made to partially replace high cost silica sand with sustainable eco-friendly *** practical utility of cow dung as an additive material that facilitates binding in sand moulds has been *** Taguchi method is used to plan and conduct nine experiments with three replicates *** analysis of variance study is performed to understand the practical significance of moulding sand variables,that is,percentage of cow dung,clay,water,and degree of ramming on sand mould *** conflicting multiple objective functions(maximize mould hardness,and minimize collapsibility and gas evolution)are optimized by utilizing the Data Envelopment Analysis Ranking(DEAR)*** optimal parameters i.e.6%of clay,4%of water,5%of cow-dung and 4 numbers of ramming strokes are obtained by applying a hybrid Taguchi-DEAR *** parameters show the best moulding properties are:mould hardness 55,gas evolution 5.9 ml·g-1,and collapsibility 470 g·***,a Lovejoy coupling made of aluminium is cast in the sand mould prepared with cow dung and without cow dung,with the optimum set of *** mechanical properties,surface finish,and microstructure of the casting cast with cow-dung are better than that without cowdung.

关键词： casting cow-dung optimization sand mould sustainability

onunion of paediatric talar neck fracture

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Chinese Journal of Traumatology 2014年第1期17卷 48-49页

作者： Nipun Jindal Parmanand gupta sandeep Jindal Department of Orthopaedics Government Medical Col- lege and Hospital Chandigarh India Department of Orthopaedics Giansagar Medical Col- lege and Hosiptal Banur Patiala India

Fractures of the paediatric talus are in- frequent injuries, most complicated by posttraumatic arthro- sis and avascular necrosis in the course of treatment. Non- union in children has not been reported before in literature. We report a case of a 12-year-old boy who had a nonunion of Hawkins type II fracture of talar neck. The nonunion was treated surgically with a good clinical outcome. The goalsof management in nonunion of paediatric talar neck fracture are different from those in fresh fractures. A suboptimal re- duction should be acceptable without trying a radical sur- gery which may cause further impairment.

关键词： Talus Fractures, ununited Paediatrics