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Lower-order transgressive-regressive cycles within a higher-order transgression at the basin margin:an aberrant intercalation of palaeosol and biostromal ichnofabrics from the early Miocene Kutch Basin,India

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Journal of Palaeogeography 2024年第4期13卷 906-923页

作者： Ayush Srivastava Sudipta Dasgupta seema Singh Bombay Ichnos Research Group Department of Earth SciencesIndian Institute of Technology Bombay(IIT Bombay)PowaiMumbaiMaharashtra 400076India Department of Geology Panjab UniversityChandigarh 160014India

The Chhasra Formation(CF)of Kutch Basin exemplifies a typical mixed siliciclastic-carbonate system with alternations of biostromal carbonate and fine-grained siliciclastic *** CF is subdivided into two members:the lower Claystone(CM)and the upper Siltstone(SM)*** CM outcrops(P1-P3)comprising buried palaeosols that formed under a specific environmental set-up involving imperfectly to poorly drained conditions,are exposed along the Berwali *** biostromal carbonate beds,alternating with the palaeosols,contain invertebrate bioclasts(bivalves,gastropods,echinoids,etc.)and are characterized by a paucispecific firmground Thalassinoides *** section P1,below the contact between the underlying palaeosol and overlying carbonate,Thalassinoides transforms into firmground Gyrolithes inside the palaeosol forming a compound *** palaeosol intervals of sections P1 and P2 consist of a Vondrichnus-Termitichnus-root trace ichnofabric defining the Termitichnus *** section P3,lenses of fully bioturbated siltstones with a monospecific firmground Thalassinoides ichnofabric can be observed within an overall silty palaeosol horizon,thereby,locally cross-cutting the pedogenic *** ichnofabrics of section P3 indicate polyphase pedogenesis with three stages:(1)initial stage:pedogenesis in siltstone of undefined depositional affinity which was obscured by pedogenic processes,(2)transient stage:recurring marine incursions and colonization by crustaceans within the lens-shaped palaeotopographic depressions overprinting the palaeosol,and(3)final stage:subaerial exposure and another preserved phase of *** CM shows an apparent low-order T-R(transgressive-regressive)cyclicity within a 3rd-order TST(transgressive systems tract)that is supported by pedogenic intensity,ichnofabrics,and reciprocal sedimentation near the Miocene basin margin,though the cyclicity can be the result of both autogenic and/or lowerorder allogenic changes.

关键词： Palaeosol Biostrome Ichnofabrics Chhasra Formation Transgressive-regressive cycles TST Kutch(Kachchh)Basin

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Update on pathology of retinoblastoma

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International Journal of Ophthalmology(English edition) 2018年第12期11卷 2011-2016页

作者： Lata Singh seema Kashyap Department of Ocular Pathology Dr.R.P.Centre for Ophthalmic Sciences All India Institute of Medical Sciences

Retinoblastoma is caused by mutational inactivation of both alleles of the RB1 gene, which maps to chromosome 13 q14 and encodes retinoblastoma protein that acts as a tumor suppressor. Histopathological high-risk features of retinoblastoma are predictive of metastasis or local recurrence. The focus of this update is to emphasize the recent advances in pathology, various molecular key pathways and genome wide approaches for newer potential therapeutic future targets associated with retinoblastoma tumor biology. This review article highlights the new biomarkers expressed by the retinoblastoma tumor for the better survival of patients.

关键词： retinoblastoma pathology molecular biology

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Seismic wave velocities of rare gas solids through elastic properties in Earth's lower mantle

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Science China Earth Sciences 2009年第10期52卷 1599-1611页

作者： seema GUPTA Suresh C. GOYAL Department of Physics Agra College Faculty of Engineering and Technology Raja Balwant Singh College

The expressions for second (SOE) and third order elastic (TOE) constants for rare gas solids are derived for comparative study of elastic behavior within the framework of many body potentials including the effect of p... 详细信息

关键词： elastic properties seismic wave velocities RGS

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Does litterfall from native trees support rainfed agriculture? Analysis of Ficus trees in agroforestry systems of southern dry agroclimatic zone of Karnataka, southern India

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Journal of Forestry Research 2013年第2期24卷 333-338页

作者： B. Dhanya Syam Viswanath seema Purushothaman Tree improvement and Propagation Division Institute of Wood Science and Technology College of Agriculture University of Agricultural Sciences Centre for Environment and Development Ashoka Trust for Research in Ecology and the Environment

Trees of the genus Ficus, integral components of indigenous rainfed agro-ecosystems of the southern dry agro-climatic zone of Karnataka, southern India, have traditionally been associated with the ecological service of soil quality enhancement in addition to various direct use benefits. We assessed the soil enrichment service of Ficus benghalensis L. a common Ficus species in these agroforestry systems, by quantifying nutrient return via litter fall. Litterfall estimation and chemical analysis of litter showed that F. benghalensis trees produce 3,512 kg ha-1 of litter annually which, on decomposition, can satisfy up to 76.70 % of N, 20.24% of P and 67.76% of K requirements of dryland crops annually per hectare. This can lead to an avoided cost of compost of US $ 36.46 ha-1·a-1 in dryland farming systems. The slow rate of decay of Ficus litter, as revealed in litter decomposition studies indicates its potential as ideal mulch for dryland soils. We discuss the complementarity between Ficus litterfall and cropping patterns in Mandya, and its implications for rainfed agricultural systems.

关键词： soil enrichment litter traps litter bags litter decomposition complementarity

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Intraocular fine needle aspiration cytology as a diagnostic modality for retinoblastoma

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International Journal of Ophthalmology(English edition) 2016年第8期9卷 1233-1235页

作者： Bhavna Chawla Anand Tomar seema Sen Mandeep S.Bajaj seema Kashyap Ocular Oncology & Paediatric Ophthalmology Service Dr.Rajendra Prasad Centre for Ophthalmic Sciences All India Institute of Medical Sciences Ocular Pathology Service Dr. Rajendra Prasad Centre for Ophthalmic Sciences All India Institute of Medical Sciences

INTRODUCTION The diagnosis of retinoblastoma(RB)is usually made by clinical examination and imaging modalities such as B-scan ultrasonography of the eye,CT scan and MRI of the *** role of fine needle aspiration cytology(FNAC)as a diagnostic modality for RB has been controversial,mainly due to concerns of tumor dissemination and extra-ocular spread[1-2].Although the majority of RB cases can be diagnosed without the need for any invasive procedure,in

关键词： FNAC RB

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Energy, economic and environmental performance assessment of a grid-tied rooftop system in different cities of India based on 3E analysis

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Clean Energy 2021年第2期5卷 288-301页

作者： Anupama Khare Saxena seema Saxena KSudhakar Department of Electrical and Electronics Engineering Rajiv Gandhi Proudyogiki Vishwavidyalaya(RGPV)Bhopal462036India Energy Centre Maulana Azad National Institute of TechnologyBhopal462003India Faculty of Mechanical and Automotive Engineering Technology Universiti Malaysia Pahang26600Malaysia

India is very rich in solar energy,with a total of 3000 sunshine hours annually in most *** installation of on-grid rooftop electricity-generation photovoltaic(PV)systems is currently undergoing substantial growth and extension as an alternate source of energy that contributes to Indian *** paper analyses the viability of mounting solar PV plants in distinct cities of India in various locations with different climate conditions such as Delhi,Bhopal,Udaipur,Ahmadabad,Thiruvananthapuram,Pune and *** technical feasibility of installing a 100-kWp system is evaluated using PVsyst software under local climatic *** performance ratio is between 70%and 80%,with a capacity utilization factor of 19-21%and estimated energy output of 170 MWh annually at all *** system produces 400-500 kWh of energy daily at a per-unit cost of INR 6-7(Indian rupees)in all *** lifespan of the system is~25-30 years,reducing about 150-170 tons of carbon-dioxide emission to the atmosphere every *** payback period of the system is~5-6 years,which defines its *** information would encourage organizations and individuals to install such PV plants on the rooftops of buildings to use solar electricity for meeting the energy demands of the country.

关键词： technical analysis solar photovoltaic system plant feasibility grid-connected system performance parameters

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Role of iron deficiency anemia in inflammatory bowel disease

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World Journal of Clinical Pediatrics 2024年第3期13卷 1-3页

作者： seema Rai Department of Pediatrics Guru Gobind Singh Medical College&HospitalFaridkot 151203PunjabIndia

Inflammatory bowel disease(IBD)is a relapsing chronic inflammatory disorder of the small and large gut with rising incidence and prevalence *** deficiency anemia is one of the most common extraintestinal manifestations of IBD,which correlates with the disease activity and tendency to relapse even after successful *** affects various aspects of quality of life,such as physical,cognitive,emotional,and workability,as well as healthcare *** anemia in IBD can be due to iron deficiency(ID)or chronic *** relative frequency of ID in IBD is 60%,according to some studies,and only 14%receive *** evaluation of ID is also tricky as ferritin,being an inflammatory marker,also rises in chronic inflammatory diseases like *** review of anemia in IBD patients involves other investigations like transferrin saturation and exploration of other nutritional deficiencies to curb the marker asthenia with which these patients often *** underscores the importance of timely investigation and treatment to prevent long-term *** can start oral iron therapy in certain ***,as inflammation of the gut hampers iron absorption,an alternative route to bypass the inflamed gut is usually recommended to avoid the requirement for blood transfusions.

关键词： Colitis Iron deficiency Anemia Inflammation Ferritin

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Comparative assessment of mechanical and chemical fluid diversion techniques during hydraulic fracturing in horizontal wells

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Petroleum Science 2023年第6期20卷 3582-3597页

作者： Maunish S.shah Subhash N.shah Drilling Cementingand Stimulation Research CenterDepartment of Petroleum EngineeringSchool of Energy TechnologyPandit Deendayal Energy UniversityRaisanGandhinagarGujaratIndia Mewbourne School of Petroleum and Geological Engineering The University of OklahomaNormanOKUSA

The application of fluid diversion during hydraulic fracturing is an evolving technology and has become popular amongst E&P operators over the past few *** primary objective of the fluid diversion is to improve hydraulic fracturing treatment by increasing stimulated reservoir volume and improving hydrocarbon *** is possible by achieving any of the following objectives:creating uniform distribution of treatment slurry within the target zone;treating unstimulated and under-stimulated zones;or by increasing fracture density by creating a complex fracture *** fluid diversion application is also helpful in decreasing the number of stages(by increasing stage length)for multi-stage plug-n-perf(PnP)fracturing *** is also applied to prevent fracture-driven interactions between adjacent wells,which is currently a major issue,especially in *** addition,for successful refracturing treatment,the diverter application is essential for isolating the existing fractures and redirecting the treatment slurry to the desired unstimulated *** diversion methods can be broadly categorized into the mechanical and chemical *** established mechanical diversion techniques are frac plugs,expandable casing patches,expandable liners,swellable packers,straddle packer assembly,sand plugs,frac sleeves,perforation ball sealers,and limited entry *** different chemical diversion techniques are particulates,fibers,gels,surfactants,perforation pods,and composite *** paper describes the current status of established mechanical and chemical diverter technologies and examines their comparative advantages and *** techniques are suitable for diverter application,but the technique is selected based on the desired objective and conditions of the wellbore and *** general guidelines for selecting diversion techniques and operational considerations are also provided in the *** diagnosis of diversion treatme

关键词： Fluid diversion Diverter Diverting agents Multi-stage fracturing Hydraulic fracturing Horizontal well

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Electrospinning of ABS nanofibers and their high filtration performance

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Advanced Fiber Materials 2020年第1期2卷 34-43页

作者： Shaohua Jiang Holger Schmalz seema Agarwal Andreas Greiner Macromolecular Chemistry Bavarian Polymer InstituteUniversity of BayreuthUniversitätsstraße 3095440 BayreuthGermany Bavarian Polymer Institute(BPI) University of BayreuthUniversitätsstraße 3095440 BayreuthGermany Present Address:College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037China

Acrylonitrile-butadiene-styrene(ABS)is a commercial polymer for widely industrial applications due to its good mechanical and physical ***,there are only countable reports regarding its fibers from *** investigation on its optimized electrospinning parameters is ***,ABS fibers with different fiber diameters were produced by *** electrospinning conditions,including the solvents,solution concentrations and amounts of different salt additives,have been comprehensively *** morphologies of electrospun ABS fibers are studied by scanning electron microscopy and Raman *** fiber diameters and coating densities are applied for filtration applications,which showed excellent filtration *** filtration efficiency of up to 99%,low pressure drop of<30 Pa,and high filtration quality factor of up to 0.477 are achieved from the electrospun ABS fibers coated on microfibrous polypropylene *** addition,the electrospun ABS fibers also shows good thermal stability and other applications such as oil/water separation.

关键词： Acrylonitrile-butadiene-styrene fiber Electrospinning Filtration Oil-water separation

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Variations in body melanisation, ovariole number and fecundity in highland and lowland populations of Drosophila melanogaster from the Indian subcontinent

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Insect Science 2008年第6期15卷 553-561页

作者： Subhash Rajpurohit Ravi Parkash seema Ramniwas Shama Singh Department of Biochemistry and Genetics Maharshi Dayanand University Rohtak 124001 India

We investigated geographical variations in three fitness-related traits （body melanisation, ovariole number and fecundity） in laboratory-reared offspring of 10 populations of Drosophila melanogaster. The populations were collected from adjacent lowland and highland localities （-80-100 km apart） in the tropical as well as subtropical regions （11.15-31.06°N） covering a linear distance about 3 000 kilometers from south to north on the Indian subcontinent. Persistence of within- as well as between-population differences at 21 ℃ suggest that observed variations in fitness-related traits have a genetic basis. Populations from higher altitudes showed consistently higher trait values （1.4-fold increase） as compared with their corresponding lowland populations. By contrast, latitudinal variations were about two-fold higher across the entire continent. Along latitude as well as altitude, population means showed higher correlation values （r 〉 0.98） between all the three fitness traits. However, on the basis of within-population analysis （assorted darker and lighter flies）, changes in body melanisation were significantly correlated with fecundity but not with ovariole number. Thus, analysis of within-population trait variability should be preferred as compared with data on population means for adaptive significance of fitness-related traits. In the present study, the role of climatic selection is evident from regression analysis with changes in annual average temperature of the sites of origin of populations along latitude as well as altitude.

关键词： altitude body melanisation Drosophila melanogaster fecundity latitude ovariole number

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