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Rift-associated ultramafic lamprophyre(damtjernite) from the middle part of the Lower Cretaceous(125 Ma) succession of Kutch,northwestern India: Tectonomagmatic implications

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Geoscience Frontiers 2018年第6期9卷 1883-1902页

作者： Rohit PANDey N.v.Chalapathi rao Prashant Dhote Dinesh PANDit A.K.Choudhary Samarendra Sahoo B.Lehmann Electron Probe Micro Analyzer Laboratory Department of Geology Centre of Advanced Study Banaras Hindu University Bhumi Geoservices 1 & 2 Maa Bamleshwari Nagar Godhani Railway Institute Instrumentation Centre Indian Institute of Technology Mineral Resources Technical University of Clausthal

Mineralogical,geochemical and isotopic(Sr and Nd) studies on the recently reported ca. 124 Ma'anorogenic lamproite' dyke from the Palanpur area, Kutch seismogenic rift zone, northwestern India, are presented. We propose a new classification for the dyke as a damtjernite(ultramafic lamprophyre; UML)based on its porphyritic-panidiomorphic texture, abundance of phlogopite, presence of nepheline in the groundmass, and the composition of liquidus phases such as olivine, phlogopite, magnetite, and clinopyroxene(diopside). The Palanpur UML is primitive(Mg# =74-77),silica-undersaturated(SiO_2vince(LIP). Bulk-rock(^(87)Sr/^(86)Sr)_i(0.70460-0.70461) and ε_(N)d(t)(+2.56 to-0.69) of the Palanpur UML signify derivation from a slightly depleted mantle source similar to that of asthenospheric magmas such as OIB. This is further attested to by the high incompatible trace element ratios(viz., La/Ba, Nb/U, Nb/La and Ta/Yb) that are typical of plume-type magmas. However, the Neoproterozoic T_(DM) depleted mantle Nd model ages( ～655-919 Ma) also necessitate some involvement of a lithospheric mantle component in its genesis. High bulk-rock Fe_2 O_3~t and TiO_2 contents require the involvement of a fertile peridotitic mantle source, whereas high La/Yb(60-80) implies a control by residual garnet. Higher Rb/Sr and lower Ba/Rb suggest phlogopite as a residual phase and high Nb and lower La/Sm favour carbonatite, rather than silicate melt as metasomatising agent. Low degrees of partial melting of a primitive garnet lherzolite mantle can account for the observed REE patterns in the Palanpur UML. The Palanpur UML shares a temporal similarity to the Kerguelen plume-derived Rajmahal basalts and associated alkaline rocks from the eastern India. The tectonomagmatic

关键词： Tectonomagmatism Cretaceous Ultramafic lamprophyre Rift Kutch India

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Enhancement of wear and ballistic resistance of armour grade AA7075 aluminium alloy using friction stir processing

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Defence Technology（防务技术） 2015年第1期11卷 10-17页

作者： I.SUDHAKAR v.MADHU G.MADHUSUDHAN REDDY K.SRINIvASA rao Department of Mechanical Engineering MVGRCE Vizianagaram India Defence Metallurgical Research Laboratory Hyderabad India Department of Metallurgical Engineering Andhra University Visakhapatnam India

Industrial applications of aluminium and its alloys are restricted because of their poor tribological properties. Thermal spraying, laser surfacing, electron beam welding are the most widely used techniques to alter the surface morphology of base metal. Preliminary studies reveal that the coating and layering of aluminium alloys with ceramic particles enhance the ballistic resistance. Furthermore, among aluminium alloys,7075 aluminium alloy exhibits high strength which can be compared to that of steels and has profound applications in the designing of lightweight fortification structures and integrated protection systems. Having limitations such as poor bond integrity, formation of detrimental phases and interfacial reaction between reinforcement and substrate using fusion route to deposit hard particles paves the way to adopt friction stir processing for fabricating surface composites using different sizes of boron carbide particles as reinforcement on armour grade 7075 aluminium alloy as matrix in the present investigation. Wear and ballistic tests were carried out to assess the performance of friction stir processed AA7075 alloy. Significant improvement in wear resistance of friction stir processed surface composites is attributed to the change in wear mechanism from abrasion to adhesion. It has also been observed that the surface metal matrix composites have shown better ballistic resistance compared to the substrate AA7075 alloy. Addition of solid lubricant Mo S2 has reduced the depth of penetration of the projectile to half that of base metal AA7075 alloy. For the first time, the friction stir processing technique was successfully used to improve the wear and ballistic resistances of armour grade high strength AA7075 alloy.

关键词： Armour grade aluminium alloy Friction stir processing Boron carbide Molybdenum disulphide Wear Ballistic resistance

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Flotation studies on low grade graphite ore from eastern India

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International Journal of Mining Science and Technology 2015年第3期25卷 415-420页

作者： vasumathi N. vijaya Kumar T.v. Ratchambigai S. Subba rao S. Bhaskar Raju G. CSIR-National Metallurgical Laboratory Madras Centre CSIR Madras Complex

A low grade graphite ore from eastern India was beneficiated by flotation to improve its quality. The ore was composed of 87.80%ash and 8.59%fixed carbon. Primary coarse wet grinding （d80：186 μm） followed by rougher flotation in Denver flotation cell using diesel as collector and pine oil as frother yielded a rougher concentrate. Regrinding （d80：144 μm） of this rougher concentrate was opted for further libera-tion of graphite. It was followed by cleaning in laboratory flotation column. This combined process of relatively coarse primary grinding followed by regrinding and cleaning in flotation column resulted in final concentrate of 7.44% yield with 89.65% fixed carbon and 6.00% ash. This approach of two-stage grinding to recover the flake graphite at the coarsest possible grind can help to minimize grinding energy costs. A conceptual flow sheet which is cost effective was developed based on this methodology.

关键词： Graphite Liberation Froth flotation Column flotation Flow-sheet development

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Heart failure in very elderly population-a profile of heart failure in patients over the age of eighty

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Journal of Geriatric Cardiology 2007年第1期4卷 20-24页

作者： christopher v. Chien Dani Hackner Ernst R. Schwarz Division of Cardiology and Comprehensive Transplant Center Department of Medicine Cedars Sinai Medical Center & University of California Los Angeles (UCLA) Los Angeles California USA

Objective Heart failure is an epidemic in the elderly, but there is a striking lack of data in this clinically important patient population. We investigated the demographics, cardiac performance, and medication management of a segment of the hospital popula- tion in at least their eighth decade of life. Methods We retrospectively reviewed 75 records of heart failure patients who were 80 years of age or older. Records were reviewed for demographic information, presence or absence of diastolic dysfunction, evaluation of ejection fraction, and medication usage including angiotensin-concerting enzyme (ACE) inhibitors, angiotensin receptor antagonists (ARBs), beta-adrenergic blockers, digoxin, and aldosterone antagonists. Assessment for contra-indications to ACE inhibitor or ARBs use was also performed to assess co-morbidities that limit treatment of heart failure. Results The population of very elderly with heart failure is heterogeneous. We found a higher proportion of females as well as higher rates of diastolic dysfunction in patients aged ≥ 90 years compared to patients between the ages of 80-89 years. Usage of ACE inhibitors, ARBs and beta-adrenergic blockers was strikingly low throughout the very elderly population. While co-morbid conditions limited use of agents in many cases, there was a lack of explicit contra-indication in most patients not on an ACE inhibitor or an ARB. Conclusions Heart failure is not a single disease processes, but a continuum of disease processes that vary with age. The elderly with heart failure are an undertreated population, in part due to the multitude of co-morbidities that affect them. Further prospective studies are needed to better understand the physiology and ideal treatment regiment in this growing population.

关键词： heart failure elderly octogenarians nonagenarians centenarians

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Chemical reaction effects on unsteady MHD flow past semi-infinite vertical porous plate with viscous dissipation

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Applied Mathematics and Mechanics(English Edition) 2011年第8期32卷 1065-1078页

作者： J.A.rao S.SHIvAIAH Department of Mathematics Osmania University Department of Mathematics Padmasri Dr.B.v.Raju Institute of Technology

The chemical reaction effect on an unsteady magnetohydrodynamic （MHD） flow past a semi-infinite vertical porous plate with viscous dissipation is analyzed. The governing equations of motion, energy, and species are transformed into ordinary differential equations （ODEs） using the time dependent similarity parameter. The resultant ODEs are then solved numerically by a finite element method. The effects of various parameters on the velocity, temperature, and concentration profiles are presented graphically, and the values of the skin-friction, Nusselt number, and Sherwood number for various values of physical parameters are presented through tables.

关键词： magnetohydrodynamic (MHD) chemical reaction porous medium viscous dissipation finite element method

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Antihyperglycemic and antihyperlipidemic activity of ethyl acetate fraction of Rhododendron arboreum Smith flowers in streptozotocin induced diabetic rats and its role in regulating carbohydrate metabolism

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Asian Pacific Journal of Tropical Biomedicine 2012年第9期2卷 696-701页

作者： Neeraj verma G Amresh PK Sahu Ch v.rao Anil Pratap Singh Department of Pharmacology Goel Institute of Pharmacy&SciencesFaizabad Road(Near Indira Canal) Department of Pharmacology School of Pharmaceutical SciencesSiksha'O' Anusandhan UniversityKalinga NagarGhatikia Pharmacognosy and Ethnopharmacology Division National Botanical Research Institute(Council of Scientific and Industrial Research)Rana Pratap Marg

Objective:To explore and identify the most potent antihyperglycemic fraction from the ethanol extract of Rhododendron arboreum(***)***:Normal and streptozotocin induced diabetic rats were treated with all four fractions of *** flowers for short term and with fraction 3 for long term *** completion of the treatment,a range of indicators were tested including fasting blood glucose,plasma protein,haemoglobin A1C,insulin secretion,body weight,blood lipid profile and carbohydrate metabolism regulating enzymes of ***:In short term study,the fraction 3(Active fraction)produced a significant(Pvel at a dose of 200 mg/kg after the treatment in the diabetic *** of active fraction(200 and 400 mg/kg)once daily for 30 d in streptozotocin diabetic rats resulted in a significant(Pvel,hemoglobin A1C,serum urea and creatinine with significant but a increase in insulin level similar to standard drug ***,the active fraction showed antihyperlipidemic activity as evidenced by significant(Pvery low density cholesterol levels coupled together with elevation of high density lipoprotein cholesterol in the diabetic ***:The active fraction of *** flowers decreases streptozotocin induced hyperglycemia by promoting insulin secretion and glycolysis and by decreasing gluconeogenesis.

关键词： Antihyperglycemic Antihyperlipidemic Ethanol Fraction Rhododendron arboreum Streptozotocin

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Co(Ⅱ),Ni(Ⅱ)和Cu(Ⅱ)与L-多巴和1,10-菲咯啉在低介电介质中三元配合物体系的化学物种(英文)

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无机化学学报 2012年第4期28卷 785-794页

作者： Ramaraju R Santhee Devi K v Nageswara rao G 安得那大学无机和分析化学系印度维沙卡帕特530003

对M髤[M=Co,Ni and Cu]与L-多巴（L）和1,10-菲咯啉（X）在的1,4-二氧杂环己烷（DOX）-水混合物【0~60%（v/v）】三元配合物体系在（303.0±0.1）K和离子强度为0.16 mol.L-1情况下进行pH滴定。结果表明：对Co髤和Cu髤而言,三元物种为MLX... 详细信息

对M髤[M=Co,Ni and Cu]与L-多巴（L）和1,10-菲咯啉（X）在的1,4-二氧杂环己烷（DOX）-水混合物【0~60%（v/v）】三元配合物体系在（303.0±0.1）K和离子强度为0.16 mol.L-1情况下进行pH滴定。结果表明：对Co髤和Cu髤而言,三元物种为MLX2H,MLXH,ML2X和MLX,但对Ni髤而言,三元物种为MLX2H,MLXH和MLX。三元物种的稳定性和浓度随介质的介电常数的变化趋势根据静电和非静电力作出解释。同时还给出了物种在不同pH值的DOX-水混合物中的分布图。根据滴定曲线推论了各种二元和三元配合物的生成。用两种方法解释了三元配合物比对应的二元配合物稳定的原因。

关键词：稳定常数 pH-滴定化学物种金属配体 1,4-二氧杂环己烷

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Deep learning ferroelectric polarization distributions from STEM data via with and without atom finding

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npj Computational Materials 2021年第1期7卷 1342-1352页

作者： christopher T.Nelson Ayana Ghosh Mark Oxley Xiaohang Zhang Maxim Ziatdinov Ichiro Takeuchi Sergei v.Kalinin Center for Nanophase Materials Sciences Oak Ridge National LaboratoryOak RidgeTNUSA Computational Sciences and Engineering Division Oak Ridge National LaboratoryOak RidgeTNUSA Department of Materials Science and Engineering University of MarylandCollege ParkMDUSA

Over the last decade,scanning transmission electron microscopy(STEM)has emerged as a powerful tool for probing atomic structures of complex materials with picometer precision,opening the pathway toward exploring ferroelectric,ferroelastic,and chemical phenomena on the atomic *** to date extracting a polarization signal from lattice coupled distortions in STEM imaging rely on discovery of atomic positions from intensity maxima/minima and subsequent calculation of polarization and other order parameter fields from the atomic ***,we explore the feasibility of polarization mapping directly from the analysis of STEM images using deep convolutional neural networks(DCNNs).In this approach,the DCNN is trained on the labeled part of the image(i.e.,for human labelling),and the trained network is subsequently applied to other *** explore the effects of the choice of the descriptors(centered on atomic columns and grid-based),the effects of observational bias,and whether the network trained on one composition can be applied to a different *** analysis demonstrates the tremendous potential of the DCNN for the analysis of high-resolution STEM imaging and spectral data and highlights the associated limitations.

关键词： Deep network ferroelectric

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Stress corrosion cracking behaviour of 7xxx aluminum alloys: A literature review

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Transactions of Nonferrous Metals Society of China 2016年第6期26卷 1447-1471页

作者： A.C.UMAMAHESHWER rao v.vASU M.GOvINDARAJU K.v.SAI SRINADH Department of Mechanical Engineering National Institute of Technology WarangalWarangal 506004India Nonferrous Materials Technology Development Centre Hyderabad-500058500005India

Stress corrosion cracking （SCC） is degradation of mechanical properties under the combined action of stress and corrosive environment of the susceptible material. Out of eight series of aluminium alloys, 2xxx, 5xxx and 7xxx aluminium alloys are susceptible to SCC. Among them, 7xxx series aluminium alloys have specific application in aerospace, military and structural industries due to superior mechanical properties. In these high strength 7xxx aluminium alloys, SCC plays a vital factor of consideration, as these failures are catastrophic during the service. The understanding of SCC behaviour possesses critical challenge for this alloy. The main aim of this review paper is to understand the effect of constituent alloying elements on the response of microstructural variation in various heat-treated conditions on SCC behavior. Further, review was made for improving the SCC resistance using thermomechanical treatments and by surface modifications of 7xxx alloys. Apart from a brief review on SCC of 7xxx alloys, this paper presents the effect of stress and pre-strain, effect of constituent alloying elements in the alloy, and the effect of environments on SCC behaviour. In addition, the SCC behaviours of weldments, 7xxx metal matrix composites and also laser surface modifications were also reviewed.

关键词： 7xxx aluminum alloy stress corrosion cracking heat treatment microstructure corrosive environment thermomechanical treatment

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Pathophysiology and Prevention of Paracentesis-induced Circulatory Dysfunction:A Concise Review

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Journal of Clinical and Translational Hepatology 2020年第1期8卷 42-48页

作者： Anand v Kulkarni Pramod Kumar Mithun Sharma T R Sowmya Rupjyoti Talukdar Padaki Nagaraj rao D Nageshwar Reddy Department of Hepatology Asian Institute of GastroenterologyHyderabadIndia Department of Gastroenterology Asian Institute of GastroenterologyHyderabadIndia

Annually,10%of cirrhotic patients with ascites develop refractory ascites for which large-volume paracentesis(LvP)is a frequently used therapeutic ***,although a safe method,is associated with circulatory dysfunction in a significant percentage of patients,which is termed para-centesis-induced circulatory dysfunction(PICD).PICD results in faster reaccumulation of ascites,hyponatremia,renal impairment,and shorter *** is diagnosed through laboratory results,with increases of>50%of baseline plasma renin activity to a value≥4 ng/mL/h on the fifth to sixth day after *** this review,we discuss the pathophysi-ology and prevention of PICD.

关键词： Refractory ascites Plasma renin activity Large-volume paracentesis Cirrhosis Portal hypertension

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