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Sharma, V.

• Effect of Different Fungicides on Storage Fungi and Germination of Acacia catechu Willd

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Authors

N. Pathania , N. P. Bhrot , V. Sharma , C. V. Sarswat

Source

Indian Forester, Vol 126, No 12 (2000), Pagination: 1351-1352

Abstract

No abstract

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• Response of Standard Rooting System to Leachates and Alcoholic Extracts from Difficult to Root Arboreal Species

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Authors

V. Sharma

Source

Indian Forester, Vol 138, No 2 (2012), Pagination: 142-145

Abstract

Leachates and alcoholic extracts (10%) from potential hardwood cutting material were prepared from Pinus wallichiana,Cedrus deodara, Abies pindrow, Thuja orientalis, Aesculus indica, Rhododendron arboreum, Magnolia grandifolia and Quercus incana, that grow around Shimla -the mid Himalayas. Rooting response of standard hypocotyl cutting system (Cucumis sativus L. 8 day old cuttings that form, on average, 14 ischolar_mains by ninth day of suspension in water at 25 ± 1°C continuous light) to 10, 100 and 1000 times dilutions of original extract were recorded. Concentrated leachates from wood of all species were toxic while ischolar_maining was slightly prormoted at 1000 and 100 times dilutions of original extract. Alcoholic extracts were toxic even at 100 times dilutions while 1000 times dilutions slightly promoted ischolar_maining of standard hypocotyl ischolar_maining systems. Residue of alcoholic extract applied after dissolution in water promoted ischolar_maining at 1000,100 and 10 times dilutions as well.

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• Some New Host Records of Root Knot Nematodes

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Authors

M. D. Mehrotra , V. Sharma

Source

Indian Forester, Vol 118, No 11 (1992), Pagination: 856-857

Abstract

No abstract

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• New Host Records of Nematodes

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Authors

V. Sharma

Source

Indian Forester, Vol 118, No 11 (1992), Pagination: 860-861

Abstract

No abstract

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• Meloidogyne Spp.- Cause of Root-knot of Important Forest Tree Species in Nurseries

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Authors

V. Sharma , M. D. Mehrotra

Source

Indian Forester, Vol 118, No 12 (1992), Pagination: 961-962

Abstract

No abstract

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• Occurrence of Root Knot Nematodes in forest Nurseries

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Authors

M. D. Mehrotra , V. Sharma

Source

Indian Forester, Vol 116, No 10 (1990), Pagination: 846-846

Abstract

No abstract

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• Late Miocene Planktonic Foraminifera of Interview Island, Bay of Bengal

Abstract Views :174  |  PDF Views:2

Authors

V. Sharma ¹, Ravindra Kumar ¹

Affiliations
1 Department of Geology, University of Delhi, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 27, No 6 (1986), Pagination: 508-511

Abstract

A sequence of clayey to sandy limestone exposed on the eastern coast of Interview Island, Bay of Bengal is studied for foraminiferal content. Twenty-seven species of planktonic foraminifera are reported. The species assemblage consisting of Globorotalia plesiotumida, Globigerinoides extremus, Neogloboquadrina acostaensis and Globorotalia (Tenuitella) anfracta suggests a Late Miocene age for the limestone unit. The assemblage is referable to Zone 17 of Blow (1969) and Zone 17A of Srinivasan and Kennett (1983) and represents the Neillian Stage (Srinivasan, 1978).

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• Late Miocene to Early Pliocene Radiolarian Biostratigraphy of Neill Island, Andaman Sea

Abstract Views :192  |  PDF Views:2

Authors

V. Sharma ¹, G. K. Sharma ¹

Affiliations
1 Deparment of Geology, University of Delhi, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 34, No 1 (1989), Pagination: 76-82

Abstract

104 species of radiolaria are recorded from a Late Miocene-Early Pliocene sequence exposed at Neill Island. The assemblage shows presence of a few reworked radiolarian species. The radiolarian zones proposed for low latitude areas are applicable in the present study. Two zones, viz., Didymocyrtis penultima Zone and Stichocorys peregrilla Zone, have been recognized in the sequence. Based on the study of pianktonic foraminifera of the same sequence by earlier workers, an integrated scheme of radiolarian and foraminiferal zones is presented.

Keywords

en

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• Radiolarian Occurrences in Surface Sediments of the Indian Ocean in Relation to Bottom Water Circulation

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Authors

V. Sharma ¹, A. K. Mahapatra ¹

Affiliations
1 Department of Geology, University of Delhi, Delhi 110007, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 35, No 3 (1990), Pagination: 251-261

Abstract

Occurrences of radiolaria in the surface sediments collected at 22 stations in the Indian Ocean are noted. While some samples contain abundant radiolaria, others show extremely poor concentration, or, are practically devoid of them. A distinct relationship is found between radiolarian abundance and deep water current systems. It is suggested that the occurrence of radiolaria is largely controlled by currents which are responsible for dissolving radiolarian skeletons. The assemblage is dominated by warm-water species and also contains a few cold-water forms. The cold-water species are believed to be transported by the Antarctic Bottom Waters (AABW) to the present area.

Keywords

Marine Geology, Indian Ocean, Palaeontology (Invertebrate).

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• Late Miocene (N eillian) Planktonic Foraminifera from Baratang Island, Andaman Sea

Abstract Views :177  |  PDF Views:2

Authors

Debashis Mazumdar ¹, V. Sharma ¹

Affiliations
1 Department of Geology, University of Delhi, Delhi 110007, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 37, No 5 (1991), Pagination: 482-491

Abstract

Neogene sequences exposed on the southwestern part of the Baratang Island have been assigned Early to Middle Miocene (?) and Late Miocene age. Biostratigraphically, the Late Miocene sequence is referable to Globorotalia (Globorotalia) plesiotumida Zone. A predominantly warm-water assemblage of planktonic foraminifera contains some cold-water species. Presence of these cold-water forms is linked with the Late Miocene climatic cooling.

Keywords

Miocene Foraminifera, Baratang Island, Biostratigraphy, Neogene.

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• Lithofacies Analysis, Benthic Foraminifera and Depositional Environments of the Chhasra Member: A Transgressive Tide and Storm Affected Early Miocene Sequence in Kachchh, India

Abstract Views :192  |  PDF Views:1

Authors

Sanjay Wahi ¹, S. K. Tandon ¹, V. Sharma ¹

Affiliations
1 Department of Geology, University of Delhi, Delhi 110 007, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 38, No 2 (1991), Pagination: 119-149

Abstract

A 40m thick Early Miocene sequence occurring near Naliya has been investigated for its sedimentary facies and benthic foraminiferal biofacies. The changing depositional environments of the sequence have been interpreted to represent (a) supratidal to (b) supratidal-intertidal and (c) subtidal (limited clastic influx) to ultimately subtidal (increased clastic influx) palaeoenvironments. The lowest part of the section shows evidence of emergence which together with benthic foraminiferal population dominated by Pararotalia nipponica - Loxostomwn lobatwn (water depths of 05-10m) suggests a supratidal environment.

The middle part of the stratigraphic interval has been subdivided into a lower and upper part on the basis of an intervening calcrete (calcretised shell limestone) horizon. The lower part of this interval represents lagoonal and high intertidal environments.

The upper part of this interval shows development of cross bedded and wave-rippled sandstones representing beach ridge-tidal inlet sequence. Other lithofacies include shell layers having predominance of one kind of organism. Some of these shell banks are wave sorted. Biofacies II -Hanzawaia nipponica - Cibicides lobatulus characterises this part of the section and indicates water depths of - 5Om.

The upper part of the sequence is composed of silt which contains Ammonia beccarii -Pseudorotalia gaimardi in abundance. This interval is frequently interspersed by oyster-Pecten beds and indicates subtidal environment with increased influx of siliciclastics.

The changing depositional environments show that these Early Miocene rocks represent a transgressive, tide-dominated, storm affected sequence.

Keywords

Lithofacies Analysis, Foraminifera, Chhasra Member, Kachchh, Gujarat, Early Miocene Sequence.

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• Radiolarian Biostratigraphy of Early Pliocene Sequences, Car Nicobar Island, Northeast Indian Ocean

Abstract Views :174  |  PDF Views:1

Authors

V. Sharma ¹, Surender Singh ¹

Affiliations
1 Department of Geology, University of Delhi, Delhi-110007, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 41, No 3 (1993), Pagination: 199-213

Abstract

A study of the radiolarian assemblage from the Sawai Bay Formation (Early Pliocene) exposed in Car Nicobar bland shows the presence of age diagnostic radiolarian taxa. Based on the radiolarian zonation applicable for the tropical Indian Ocean, three radiolarian zones are identified in this formation. These, in ascending order, are: Phormostichoartus doliolum zone, P. fistula zone and Stichocorys peregrina Zone. The radiolarian events (first and last appearances) recognised in the Car Nicobar sequences are discussed in relation to those in the Central Indian Ocean Basin. The proposed radiolarian zones are correlated with the previously proposed planktonic foraminiferal zone in the study area, and an htegrated biostratigraphic scheme is presented.

Keywords

Car Nicobar, Pliocene, Radiolarian Zonation, Micropaleontology, Northeast Indian Ocean.

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• Cretaceous and Middle Eocene Radiolaria from Ejected Sediments of mud Volcanoes of Baratang Island in Andaman Sea of the Northeastern Indian Ocean

Abstract Views :171  |  PDF Views:3

Authors

Hsin Yi Ling ¹, V. Sharma ², Surender Singh ², D. Mazumdar ², A. K. Mahapatra ²

Affiliations
1 Department of Geology, Northern Illinois University, DeKalb, Illinois 601 15, US
2 Department of Geology, University of Delhi, Delhi-110 007, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 45, No 4 (1995), Pagination: 463-469

Abstract

Radiolarians from seven samples of ejected sediments of mud volcanoes of Baratang Island in the Andaman Sea provide additional evidence for the presence of Cretaceousand MiddIe Eocene strata beneath the island. A general NNE-SSW alignment of the mud volcanoes suggests the structural control for their occurrence due to regional tectonics.

Keywords

Radiolaria, Mud Volcanoes, Cretaceous, Eocene, Andaman Sea, Indian Ocean

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• Early Miocene Radiolarian and Planktonic Foraminiferal Biostratigraphy, North Passage Island, Andaman Sea

Abstract Views :173  |  PDF Views:1

Authors

V. Sharma ¹, M. S. Srinivasan ², A. K. Mahapatra ¹

Affiliations
1 Department of Geology, University of Delhi, Delhi 110 007, IN
2 Department of Geology, Banaras Hindu University, Varanasi 221 005, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 42, No 2 (1993), Pagination: 154-162

Abstract

The Early Miocene sequences of North Passage Island iu the Andaman Sea have been studied for their siliceous and calcareous microfossil assemblages. 95 species of radiolaria and 27 species of planktonic foraminifera belonging to these two major groups of microfossils have been documented. An integrated radiolarian ancl planktonic foraminifera1 biostratigraphy is presented.

Keywords

Radiolaria, Planktonic Foraminifera, Biostratigraphy, Micropaleontology, Early Miocene, Andaman-Nicobar Islands.

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• Stratigraphy and Microfauna of Car Nicobar Island Bay of Bengal

Abstract Views :193  |  PDF Views:2

Authors

M. S. Srinivasan ¹, V. Sharma ¹

Affiliations
1 Department of Geology, Banaras Hindu University, Varanasi, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 14, No 1 (1973), Pagination: 1-11

Abstract

The paper gives a complete stratigraphic sequence of Car Nicobar strata for the first time since the work of Schwager. The Sawai Bay formation (consisting of a mudstone member and a limestone member) and the Malacca limestone formation belonging to Archipelago Group are proposed with their type localities defined at Car Nicobar island. Based on the known stratigraphic ranges of planktonic foraminifera, the following three zones are distinguished in ascending order: (1) Globorotalia tumida flexuosa zone, (2) Globigerina nepenthes zone, and (3) Globorotalia multicamerata-Pulleniatina obliqueloculata (s.s.) zone. An Early to Middle Pliocene age is assigned to Schwager's Car Nicobar foraminifera based on planktonic foraminiferal evidence. A comparison of the zonation of Car Nicobar island with zones proposed by Banner and Blow shows that Banner and Blows' sequence is most applicable, and is used in the present work as a basis for comparison.

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• Stability of Stratified Rivlin-Ericksen Fluid Permeated with Suspended Particles and Uniform Horizontal Magnetic Field in Porous Medium

Abstract Views :157  |  PDF Views:0

Authors

G. C. Rana ¹, V. Sharma ²

Affiliations
1 Department of Mathematics, NSCBM Govt. P. G. College, Hamirpur-177 005, IN
2 Department of Mathematics, Himachal Pradesh University, Shimla-171005, IN

Source

The Journal of the Indian Mathematical Society, Vol 80, No 1-2 (2013), Pagination: 173-182

Abstract

In this paper, we investigate the stability of stratified Rivlin-Ericksen elastico-viscous fluid permeated with suspended particles (fine dust) and uniform horizontal magnetic field in porous medium. By applying normal mode analysis method, the dispersion relation is derived and solved numerically. The system is found to be stable for stable stratifications and unstable for unstable stratifications as in the case of Newtonian fluid. The uniform horizontal magnetic field stabilizes the system for certain wave number range. The growth rates decrease with the increase of kinematic viscosity, kinematic viscoelasticity, suspended particle number density and magnetic field.

Keywords

Rivlin-Ericksen Elastico-Viscous Fluid, Magnetic Field, SusPended Particles, Porous Medium.

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• In Vitro Permeation Studies on Clonazepam from Proniosomes Based Niosomes for Transdermal Delivery

Abstract Views :192  |  PDF Views:99

Authors

P. Parashar ¹, V. Sharma ¹, K. Pathak ¹

Affiliations
1 Rajiv Academy for Pharmacy, Mathura, IN

Source

Journal of Pharmaceutical Research, Vol 8, No 1 (2009), Pagination: 61-65

Abstract

Proniosmal gel of clonazepam (CNZ) for transdermal delivery to provide controlled drug release was prepared by phase coacervation method using non ionic surfactants, cholesterol and egg lecithin. The formulations were investigated for surface morphology by scanning electron microscopy (SEM), particle size, entrapment efficiency, in-vitro drug release and in-vitro drug permeation. SEM enabled visualization of proniosomes of clonazepam and the vesicle size was found to be in the range of 1492.32 - 9865.68 nm with entrapment efficiency as high as 72.9%. Amongst the ten formulations designed, F2 and F6 were selected as the optimized formulations and incorporation of egg lecithin increased the entrapment efficiency of the selected formulations to more than 90%. The fabricated matrix transdermal patch exhibited more than 70% drug release in 24 hours.

Keywords

Clonazepam, Proniosomes, Transdermal Delivery, In Vitro Permeation.

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• Miocene Palynoflora from Inglis Island, Andaman Sea and its Palaeoecological Implication

Abstract Views :199  |  PDF Views:2

Authors

J. Daneshian ¹, S. Sarkar ², V. Sharma ³

Affiliations
1 Department of Geology, Teacher Training University, No-49 Mofatteh Ave, Tehran, IR
2 Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow - 226 007, IN
3 Department of Geology, University of Delhi, Delhi -110 007, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 70, No 1 (2007), Pagination: 147-157

Abstract

A nch palynofloral assemblage has been recorded for the first time from a stratigraphc section of the Inglis Formation at Inglis Island, Andarnan Sea, India Forty-six genera and fifty eight species belonging to differen botanical groups viz , dinoflagellate cysts, fungal remains, ptendophytic spores, and gymnospermous and angiospermous pollen have been recognized Geological ranges of some stratigraphically important palynotaxa suggest late Early Mioceneearly Middle Miocene age to the assemblage The recorded palynofloral assemblage is also closely comparable to that recorded horn late Early Miocene-Early Middle Miocene sediments of South Indla The palynoflora has been compared with the modem equivalents and it indicates a warm humid climate with high degree of rainfall during the deposition of the sequence In the area of investigation.

Keywords

Palynoflora, Late Early Miocene-Early Middle Miocene, Palaeoecology, Inglis Island, Andaman Sea

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• Miocene Radiolaria from Inglis Island, Andaman Sea

Abstract Views :191  |  PDF Views:2

Authors

V. Sharma ¹, J. Daneshian ¹, L. Bhagyapati Devi ¹

Affiliations
1 Department of Geology, University of Delhi, Delhi - 110 007, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 70, No 6 (2007), Pagination: 939-949

Abstract

Two radiolanan assemblages are distinguished in the Calocydetta (C) costata Zone of Early to Middle Miocene from a stratigraphic section of Inghs Island, Andaman Sea Fluctuations in percent abundance of cooler and warmer water taxa in the section indicate changing water mass conditions Water mass fluctuations in the form of cooling and warming of surface water have also been identified in the same stratigraphic interval from various tropical Indian Ocean DSDP and ODP sites by other investigators using oxygen isotope data.

Keywords

Radiolana, Miocene, Andaman Sea, Inghs Island, Andaman-Nicobar.

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• Rare Case of Ebstein Anomaly Presented as Supraventricular Tachycardia with Aberrancy in a 40 Year Old Adult Patient

Abstract Views :203  |  PDF Views:0

Authors

S. Samadhiya ¹, T. Nag ¹, M. Palsania ¹, R. Meena ¹, V. Hawa ¹, V. Sharma ¹, S. Chaudhary ¹, M. Maheshwari ¹, S. Maheshwari ²

Affiliations
1 Deptt of Medicine, Jawaharlal Nehru Medical College and Hospital, Kala Bagh, Ajmer, Rajasthan 305001, IN
2 Jawaharlal Nehru Medical College and Hospital, Kala Bagh, Ajmer, Rajasthan 305001, IN

Source

The Indian Practitioner, Vol 69, No 2 (2016), Pagination: 42-43

Abstract

Ebstein's anomaly is a congenital heart defect. The septal and posterior leaflets of the tricuspid valve are displaced toward the apex of the right ventricle called as atrialization of right ventricle. Most of them have interatrial communication. Ebstein's anomaly accounts for >1% of all cases of congenital heart disease. It has a high mortality rate in first few months of life and rarely patients with Ebstein's anomaly live up to adulthood. We here are presenting a case report of a 40-year-old male who presented with palpitation and lightheadedness and was found to be a case of Ebstein's anomaly with the late presentation in fourth decade of life.

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• Miocene Radiolaria from Nicholson and John Lawrence Islands, Andaman Sea

Abstract Views :178  |  PDF Views:2

Authors

V. Sharma ¹, J. Daneshian ¹

Affiliations
1 Department of Geology, University of Delhi, Delhi - 110 007, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 52, No 6 (1998), Pagination: 695-707

Abstract

One hundred and thirty three radiolarian taxa from two sections, one each at Nicholson Island and John Lawrence Island, Andaman Sea are reported. The assemblage is referable to upper Calocycletta costata Zone to lower Dorcadospyris alata Zone (late Early Miocene to early Middle Miocene, about 16.9 Ma to 15.9 Ma). Stratigraphic ranges of some selected species are compared with those in the deep sea drilling sites in the tropical Indian Ocean.

Keywords

Radiolaria, Micropaleontology, Miocene, Andaman-Nicobar Islands, Indian Ocean.

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• Organophosphorus Poisoning Complicated by Acute Myocardial Infarction-A Case Report

Abstract Views :205  |  PDF Views:1

Authors

M. Maheshwari ¹, V. Sharma ¹

Affiliations
1 J.L.N. Medical College, Ajmer, IN

Source

The Indian Practitioner, Vol 69, No 8 (2016), Pagination: 32-34

Abstract

Acute organophosphate (OP) poisoning represents a major health problem in developing countries where OP compounds are widely and easily available as pesticide. Toxicity due to these agents can affect many organs including lungs, brain and heart. The possible mechanisms for myocardial injury include sympathetic/parasympathetic overactivity, hypoxemia, acidosis, dyselectrolemia, and direct cardio toxicity. Cardiac manifestations consist of electrocardiographic ST-T segment changes, AV conduction disturbances and QT prolongation, leading to torsades de pointes and sudden cardiac death. Acute coronary syndrome as a complication of OP poisoning has been reported rarely. We report herein a fatal case of OP poisoning complicated by acute myocardial infarction.

Keywords

Organophosphorus Compound, Cardiac Toxicity, Myocardial Infarction.

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References

• International Programme on Chemical Safety, World Health Organization (WHO). Epidemiology of pesticide poisoning: harmonized collection of data on human pesticide exposure in selected countries. Geneva, Switzerland: WHO Press; 2004.
• Linden CH, Burns MJ, Mycyk MB. Poisoning, drug overdose and envenomation. In: Fauci AS, Braunwald E, Kasper DL, Hauser SL, Longo DL, Jameson JL, et al., editors. Harrison’s Principles of Internal Medicine. 17th ed. New York: McGraw-Hill; 2008. p.2741-8.
• Yamashita, M., M. Yamashita, J. Tanaka and Y. Ando, 1997. Human mortality in organophosphate poisonings. Vet. Hum. Toxicol., 39: 84-85
• Karki P, Ansari JA, Bhandary S, Koirala S. Cardiac and electrocardiographical manifestations of acute organophosphate poisoning. Singapore Med J 2004;45:385-9
• Kidiyoor Y, Nayak VC, Devi V, Bakkannavar SM, Kumar GP, Menezes RG. A rare case of myocardial infarction due to parathion poisoning. J Forensic Leg Med 2009;16:472-4.
• Madhu Pankaj, Kavita Krishna. Acute Organophosphorus Poisoning Complicated by Acute Coronary Syndrome JAPI 2014;62;62-63
• Ludomirsky A, Klein HO, Sarelli P, Becker B, Hoffman S, Taitelman U, Q-T prolongation and polymorphous (torsade de pointes) ventricular arrhythmias associated with Organophosphorus insecticide poisoning. Am J Cardiol 1982;49:1654-8.
• Yasue H, Touyama M, Shimamoto M, Kato H, Tanaka S. Role-of autonomic nervous system in the pathogenesis of Prinzmetal’s variant form of angina. Circulation1974;50:534-9.
• Karasu-Minareci E, Gunay N, Minareci K, Sadan G, Ozbey G. What may be happen after an organophosphate exposure: Acute myocardial infarction? J Forensic Leg Med 2012;19:94-6.

• Micropaleontology:Principles and Applications

Abstract Views :197  |  PDF Views:72

Authors

V. Sharma ¹

Affiliations
1 A4/404, Gardenia Glory, Sector 46, Noida, IN

Source

Current Science, Vol 111, No 10 (2016), Pagination: 1709-1709

Abstract

In recent years there has been a dearth of books on micropalaeontology written in modern perspective, especially in view of the knowledge gathered as a result of the study of microfossils from deep-sea cores obtained during various oceanographic expeditions in the last few decades. These studies revolutionized the concept of application of microfossils in unfolding geological problems, hitherto partially understood. The book under review fills this gap and is the latest contribution in the field of micropalaeontology.

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• Early Neogene Radiolarian Faunal Turnover in the Northern Indian Ocean: Evidence from Andaman-Nicobar

Abstract Views :190  |  PDF Views:0

Authors

V. Sharma ¹, Jahanbakhsh Daneshian ², L. Bhagyapati Devi ¹

Affiliations
1 Department of Geology, University of Delhi, Delhi - 110 007, IN
2 Department of Geology, Teachers' Training University of Tehran, Tehran, IR

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 78, No 2 (2011), Pagination: 157-166

Abstract

Two intervals of faunal turnover are revealed by the study of radiolarians from the Early to Middle Miocene sequence of Andaman-Nicobar belonging to Stichocorys wolffii-Calocycletta costata -Dorcadospyris alata zones. These faunal changes are reflected in the values of species diversity, change in abundance of taxa, origination and extinction events and change in radiolarian assemblages. One such faunal change is identified in the latest Early Miocene. The time of this faunal change is marked by the extinction of species like Carpocanopsis cingulata and appearance of Calocycletta costata, Giraffospyris toxaria, Acrocubus octopylus and Liriospyris parkerae, an increasing trend in percentage of cold water species and a decreasing trend in species diversity upwards. The interval coincides with the time of initiation of cooling of sea surface water. Another, and the most prominent faunal turnover of radiolarians is recognized in the Middle Miocene Dorcadospyris alata Zone at about 14.8-12.7 Ma and is characterized by almost complete disappearance of an earlier dominant assemblage and an increase in abundance of an assemblage that was practically absent in the older sequence. The time of this turnover can be correlated with the time of Middle Miocene cooling identified in the examined sequence.

Keywords

Faunal Turnover, Miocene, Early Neogene, Radiolarians, Indian Ocean, Andaman-Nicobar.

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References

• BERGGREN, W.A., KENT, D.V., SWISHER, C.C. III and AUBRY, M.P. (1995) A revised Cenozoic geochronology and chronostratigraphy. SEPM Spec. Publ., v.54, pp.129-212.
• BILLUPS, K., CHANNELL, J.E.T. and ZACHOS, J. (2002) Late Oligocene to early Miocene geochronology and paleoceanography from the subantarctic South Atlantic. Paleoceanogr., v.17, pp.1-11.
• BILLUPS, K. and SCHRAG, D.P. (2002) Paleotemperature and ice volume of the past 27 Myr revisited with paired Mg/Ca and O-18/O-16 measurements on benthic foraminifera. Paleoceanogr., v.17, pp.3-1 - 3-11.
• CAULET, J.P., NIGRINI, C. and SCHNEIDER, D.A. (1993) High resolution Pliocene -Pleistocene radiolarian stratigraphy of the tropical Indian Ocean. Mar. Micropaleont., v.22, pp.111-129.
• EHRMANN, W.U. and MACKENSEN, A. (1992) Sedimentological evidence for the formation of an East Antarctic ice sheet in Eocene/Oligocene time. Palaeogeo. Palaeoclimat. Palaeoeco., v.93, pp.85-112.
• FLOWER, B.P. and KENNETT, J.P. (1994) The middle Miocene climatic transition: East Antarctic ice sheet development, deep ocean circulation and global carbon cycling. Palaeogeo. Palaeoclimat. Palaeoeco.,v.108, pp.537-555.
• FLOWER, B.P. and KENNETT, J.P. (1995) Middle Miocene deep water paleoceanography in the southwest Pacific: relations with East Antarctic Ice Sheet development. Palaeoceanogr., v.10, pp.1095-1112.
• GUPTA, S.M. and FERNANDES, A.A. (1995) Supra- generic transfer function based late Miocene Paleomonsoonal changes in the northeastern Tropical Indian Ocean. Bull. Indian Geol. Assoc., v.28, pp.29-51.
• JOHNSON, D.A. (1974) Radiolaria from the eastern Indian Ocean, Deep Sea Drilling Project Leg 22. In: C.C. von der Borch, J.G. Sclater et al., (Eds.), Initial Repts. Deep Sea Drilling Project, Leg 22, v.22, pp.521-575.
• JOHNSON, D.A. (1990) Radiolarian biostratigraphy in the Central Indian Ocean, Leg 115. In: R.A. Duncan, J. Backman, L.C.Peterson et al. (Eds.), Proc. Ocean Drilling Program, Scientific Results, v.115, pp.395-409.
• JOHNSON, D.A. and NIGRINI, C. (1985) Synchronous and timetransgressive Neogene radiolarian datum levels in the equatorial Indian and Pacific Oceans. Mar. Micropalaeont., v.9, pp.489-523.
• JOHNSON, D.A., SCHNEIDER, D.A., KENT, D.V., NIGRINI, C.A. and CAULET, J.P. (1989) Plio-Pleistocene radiolarian events and magnetostratigraphic calibrations for the tropical Indian Ocean. Mar. Micropalaeont., v.14, pp.33-66.
• KELLER, G. and MACLEOD, N. (1992) Faunal turnover and depth stratification: their relationships to climate and productivity events in the Eocene to Miocene pelagic realm. In: K. Ishizaki and T. Saito (Eds.), Centenary of Japanese Micropaleontology. Terra Scientific Publishing Company, Tokyo, pp.1-14.
• KENNETT, J.P. (1977) Cenozoic evolution of Antarctic glaciation, the Circum-Antarctic Ocean, and their impact on global paleoceanography. Jour. Geophys. Res., v.82, pp.3843-3860.
• KUHNERT, H., BICKERT, T. and PAULSEN, H. (2009) Southern Ocean frontal system changes precede Antarctic ice sheet growth during the middle Miocene. Earth Planet. Sci. Lett., v.284, pp.630-638.
• LAZARUS, D., SPENCER-CERVATO, C., PIANKA-BIOLZI, M., BECKMANN, J.P., VON SALIS, K., HILBRECTHT, H. and THIERSTEIN, H. (1995) Revised chronology of Neogene Holes from the world ocean. Ocean Drilling Program, College Station, Texas, Tech Note 24.
• LECKIE, R.M. and WEBB, P.N. (1983) Late Oligocene-early Miocene glacial record of the Ross Sea, Antarctica: Evidence from DSDP Site 270. Geology, v.11, pp.578-582.
• LING, H.Y. and SAMUEL, M.A. (1998) Siliceous microfossil from Nias Island; their significance for the Tertiary paleoceanography of the Northeast Indian Ocean. Jour. Asian Earth Sci., v.6, pp.407-417.
• MAHAPATRA, A.K. and SHARMA, V. (1994) Trissocyclid Radiolaria form late Early Miocene sequences of Colebrook, North Passage and Great Nicobar Islands, Northeast Indian Ocean. Micropalaeont., v.40, pp.157-168.
• MILLER, K.G., WRIGHT, J.D. and FAIRBANKS, R.G. (1991) Unlocking the ice house: Oligocene- Miocene oxygen isotopes, eustasy and margin erosion. Jour. Geophys. Res., v.96, pp.6829-6848.
• MOORE, T.C., JR. (1973) Methods of randomly distributing grains for microscopic examination. Jour. Sed. Petrol., v.43, pp.904- 906.
• NIGRINI, C. (1991) Composition and biostratigraphy of radiolarian assemblages from an area of upwelling (northwestern Arabian Sea, Leg 117). In: W.V. Prell et al. (Eds.), Proc. Ocean Drilling Program, Scientific Results, v.117, pp.89-126.
• NIGRINI, C. and CAULET, J. P. (1992) Late Neogene radiolarian assemblages characteristic of Indo-Pacific areas of upwelling. Micropalaeont., v.38, pp.139-154.
• ROMINE, K. and MOORE, T.C., JR. (1981) Radiolarian assemblage distributions and paleoceanography of the eastern equatorial Pacific Ocean during the last 127000 years. Palaeogeo. Palaeoclimat. Palaeoeco., v.35, pp.281-314.
• SANFILIPPO, A. and NIGRINI, C. (1998) Code numbers for Cenozoic low latitude radiolarian biostratigraphic zones and GPTS conversion tables. Mar. Micropaleont., v.33, pp.109-156.
• SHACKLETON, N.J. and KENNETT, J.P. (1975) Paleotemperature history of the Cenozoic and the initiation of Antarctic glaciation: Oxygen and carbon isotope analyses in Deep Sea Drilling Project Sites 277, 279 and 281. In: J.P. Kennett, et al. (Eds.), Initial reports of the Deep Sea Drilling Projects, v.29, pp.743-755.
• SHACKLETON, N.J., BALDAUF, J.G., FLORES, J.A., IWAI, M., MOORE, T.C., JR., RAFFI, I. and VINCENT, E. (1995) Biostratigraphic summary for Leg 138. Proc. Ocean Drilling Program, Sci. Results, v.138, pp. 517-536.
• SHARMA, V. and DANESHIAN, J. (2003) Early Neogene radiolarian changes in the Northeast Indian Ocean and paleoceanographic implications: Evidence from the Andaman -Nicobar Islands. In: Ratanasathien et al. (Eds.), Proc. 8th International Congress on Pacific Neogene Stratigraphy, Chiang Mai, Thailand, pp.126-158.
• SHARMA, V. and DEVI L. BHAGYAPATI (2007a) New radiolarian zones in the Early to Middle Miocene of Andaman-Nicobar, Northern Indian Ocean. Jour. Palaeont. Soc. India, v.52, pp.155-158.
• SHARMA, V. and DEVI L. BHAGYAPATI (2007b) Neogene Oceanographic and climatic changes in the Northern Indian Ocean: Evidence from Radiolaria. Indian Jour. Mar. Sci., v.36, pp.361-368.
• SHARMA, V. and SINGH, S. (1997a) Early Neogene Radiolaria from Andaman-Nicobar Islands, Indian Ocean: paleoclimatic implications. In: S. Nishimura and R. Tsuchi (Eds.), Proc. Oji Seminar on Neogene Evolution of Pacific Ocean Gateways, IGCP-355, Japan, pp.80-102.
• SHARMA, V. and SINGH, S. (1997b) Late Neogene radiolarian events in Andaman-Nicobar Islands, Northeast Indian Ocean. Micropaleont., v.43, pp.21-28.
• SHARMA, V., SINGH, S. and RAWAL, N. (1999) Early Middle Miocene Radiolaria from Nicobar Islands, Northeast Indian Ocean. Micropaleont., v.45, pp.251-352.
• SHEVENELL, A.E., KENNETT, J.P. and LEA, D.W. (2004) Middle Miocene Southern Ocean cooling and Antarctic cryosphere expansion. Science, v.305, pp.1766-1770.
• SMART, C.W., THOMAS, E. and RAMSAY, A.T.S. (2007) Middle-late Miocene benthic foraminifera in a western equatorial Indian Ocean depth transect: Paleoceanographic implications. Palaeogeo. Palaeoclimat. Palaeoeco., v.247, pp.402-420.
• SRINIVASAN, M.S. and DAVE, A. (1985) Miocene sediments of Nancowry and Kamorta Islands: Their biostratigraphic and climatic record. Geol. Min. Met. Soc. India., v.52, pp.319- 334.
• SRINIVASAN, M.S., LOMBARI, G. and DAVE, A. (1983) Early Miocene planktonic foraminiferal and radiolarian zonation, Colebrook Island, Andaman Sea. Jour. Geol. Soc. India, v.24, pp.1-18.
• VERDUCCI, M., FORESI, L.M., SCOTT, G.H., SPROVIERI, M., LIRER, F. and PELOSI, N. (2009) The Middle Miocene climatic transition in the Southern Ocean. Evidence of paleoclimatic and hydrographic changes at Kerguelen plateau from planktonic foraminifers and stable isotopes. Palaeogeo., Palaeoclimat., Palaeoeco., v.280, pp.371-386.
• VERDUCCI, M., FORESI, L.M., SCOTT, G.H., TIEPOLO, M., SPROVIERI, M. and LIRER, F. (2007) East Antarctic Ice Sheet Fluctuations during the Middle Miocene Climatic Transition inferred from faunal and biogeochemical data on planktonic foraminifera (Ocean Drilling Program Hole 747A, Kerguelen Plateau) USGS OF -2007-1047 - 1047, Short Research paper 037 ; doi10.3133/of2007-1047.srp037
• VINCENT, E. and KILLINGLEY, J.S. (1985) Oxygen and carbon isotope record for the early and middle Miocene in the central equatorial Pacific (DSDP Leg 85). In: L. Mayer et al. (Eds.), Initial repts. Deep Sea Drill. Project., v.85, pp.749-769.
• VINCENT, E., KILLINGLEY, J.S. and BERGER, W.H. (1985) Miocene oxygen and carbon isotope stratigraphy of the Tropical Indian Ocean. In: J.P. Kennett (Ed.), The Miocene Ocean: Paleoceanography and Biogeography. Geol. Soc. Amer. Mem., v.163, pp.103-130.
• VINCENT, E., SHAKLETON, N.J. and HALL, M.A. (1991) Miocene oxygen and carbon isotope stratigraphy of planktonic foraminifers at Sites 709 and 758, Tropical Indian Ocean. In: J. Weissel, et al. (Eds.), Proc. Ocean Drilling Program, Scientific Results, v.121, pp.241-252.
• WOODRUFF, F. and SAVIN, S.M. (1989) Miocene deepwater oceanography. Paleoceanogr., v.4, pp.87- 140.
• WOODRUFF, F. and SAVIN, S.M. (1991) Mid-Miocene isotope stratigraphy in the deep sea: high resolution correlations, paleoclimatic cycles, and sediment preservation. Paleoceanogr., v.6, pp.755-806.
• WRIGHT, J.D. and MILLER, K.G. (1993) Southern Ocean influences on late Eocene to Miocene deepwater circulation. The Antarctic palaeonvironment: A perspective on Global Change. Antarctic Res., v.60, pp.1-25.
• WRIGHT, J.D., MILLER, K.G. and FAIRBANKS, R.G. (1992) Early and Middle Miocene stable isotopes: implications for deepwater circulation and climate. Paleoceanogr., v.7, pp.357-389.
• ZACHOS, J.C., PAGANI, M., SLOAN, L., THOMAS, E. and BILLUPS, K. (2001) Trends, rhythms, and aberrations in global climate 65 Ma to present. Science, v.292, pp.686-693.
• ZACHOS, J.C., STOTT, L.D. and LOHMANN, K.C. (1994) Evolution of early Cenozoic marine temperatures. Paleoceanogr., v.9, pp.353-387.

• Beneficial Effects of Tinospora cordifolia on Blood Profiles in Male Mice Exposed to Lead

Abstract Views :176  |  PDF Views:0

Authors

V. Sharma ¹, D. Pandey ¹

Affiliations
1 Bioscience and Biotechnology Department, Banasthali University, Banasthali - 304 022, Tonk, Rajasthan, IN

Source

Toxicology International (Formerly Indian Journal of Toxicology), Vol 17, No 1 (2010), Pagination: 8-11

Abstract

This study was carried out to evaluate in vivo protective role of aqueous extract of stem and leaves of Tinospora cordifolia (TC) on the toxic effects of lead on the hematological values. The lead-treated (5 mg/kg body weight, intraperitonially, once daily) male albino mice concurrently received either T. cordifolia stem or leaves extracts (400 mg/kg body weight, orally, once daily) for the duration of 30 days. The animals exposed to lead showed significant decrease in RBC and Hb level. Significant decline in WBC, DLC, and PCV was also noticed. Increase in MCV values displaying reciprocal relationship with RBC, PCV, and Hb values in lead-treated mice were also recorded. These influences of lead were prevented by concurrent daily administration of T. cordifolia stem and leaves extract. These results suggested that simultaneous supplementation of T. cordifolia protects against lead intoxication.

Keywords

Hematology, lead nitrate, mice, Tinospora cordifolia

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• Protective Role of Tinospora cordifolia against Lead-induced Hepatotoxicity

Abstract Views :163  |  PDF Views:0

Authors

V. Sharma ¹, D. Pandey ¹

Affiliations
1 Bioscience and Biotechnology Department, Banasthali University, Banasthali - 304 022, Tonk, Rajasthan, IN

Source

Toxicology International (Formerly Indian Journal of Toxicology), Vol 17, No 1 (2010), Pagination: 12-17

Abstract

The importance of Tinospora cordifolia stem and leaves extract was investigated for its possible hepatoprotective effect in Swiss albino male mice against lead nitrate induced toxicity. Oral administration of plant extracts prevented the occurrence of lead nitrate induced liver damage. The decreased level of tissue enzymes, i.e., superoxide dismutase (SOD), catalase (CAT) and increased level of aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), and acid phosphatase (ACP) were observed in mice treated with lead. Administration of aqueous stem extract (400 mg/kg body weight, orally) and aqueous leaves extract (400 mg/kg body weight, orally) along with the lead nitrate (5 mg/kg body weight, i.p. for 30 days) increased the activities of SOD and CAT and decreased the levels of AST, ALT, ALP, and ACP enzymes in mice. These biochemical observations were supplemented by histopathology/histological examinations of liver section. Results of this study revealed that plant extract could afford protection against lead-induced hepatic damage.

Keywords

Biochemical changes, histopathology, lead nitrate, liver, mice, Tinospora cordifolia

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