检索结果-南通市图书馆

mpaired flow-mediated vasodilatation in Asian Indians with erectile dysfunction

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2013年第5期15卷 652-657页

作者： Tanuj Bhatia Aditya Kapoor Jatinder Kumar Archana Sinha Priyadarshi Ranjan Sudeep Kumar Naveen Garg Satyendra-tewari Aneesh Srivastava Rakesh Kapoor Pravin K Goel Departments of Cardiology Sanjay Gandhi PGIMS Lucknow 226014 India Urology and Renal Transplantation Sanjay Gandhi PGIMS Lucknow 226014 India

Endothelial dysfunction is the postulated link between coronary artery disease （CAD） and erectile dysfunction （ED）. Brachial artery flow-mediated vasodilatation （FMD） is a non-invasive surrogate marker for endothelial function assessment. Despite Asian Indians representing a considerable global CAD burden, data on FMD and ED in these patients are lacking. Of the 225 patients undergoing coronary angiography, 72% had ED （assessed using the International Index of Erectile Function （IIEF-5） questionnaire）; ED was moderate to severe in 61% of the patients. ED patients had a higher incidence of severe and diffuse angiographic CAD, a greater number of coronary vessels involved and a lower mean brachial artery FMD （6.40%±4.60% vs. 9.10%±4.87%, P〈0.001） compared to non-ED patients. A progressive reduction in FMD was noted with increasing severity of ED. Impaired FMD （ ≤ 5.5%） was twice as common in ED patients （52% vs. 24% without ED）. Patients with impaired FMD had higher ED prevalence （85% vs. 62%） and lower mean I IEF-5 scores compared to those with normal FMD. Impaired FMD was a significant ED predictor independent of other risk factors （odds ratio, 2.33; 95% confidence interval： 0.59-9.23; P=0.03）. An inverse correlation between FMD and ED severity was observed （r=-0.22; P=0.004）. ED is common among Asian Indians with angiographically documented CAD. Patients with ED have impaired FMD independent of other risk factors, suggesting that endothelial dysfunction is the underlying pathophysiology. Urologists and cardiologists need to be aware of the association between ED, CAD and endothelial dysfunction.

关键词： Asian Indians brachial artery flow mediated vasodilatation erectile dysfunction (ED)

Cross Layer Design for Cooperative Transmission in Wireless Sensor Networks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Wireless Sensor Network 2011年第6期3卷 209-214页

作者： Kanojia Sindhuben Babulal Rajiv Ranjan tewari 不详

Several protocols and schemes have been proposed to reduce energy consumption in Wireless Sensor Net-works (WSNs). In this paper we employ farcoopt, a cross layer design approach with the concept of coop-eration among the nodes with best farthest neighbor scheme to increase the Quality of Service (QoS), reduce energy consumption, increases performance and end-to-end throughput. We present cooperative transmission to connect previously disconnect parts of a network thus overcoming the separation problem of multi-hop network. We show that this approach improves connectivity over 50% compared to multi-hop approaches and reduces the number of nodes necessary to provide full coverage of an area up to 35%. Simulation results show that on increase of data rates i.e. packet the network life time increases in farcoopt as compared to tra-ditional multi hop approach. The result of this analysis is presented in this work.

关键词： Cooperative Network Cross Layer Design Wireless Sensor Networks Energy Saving Communication Protocol Routing

Well Behaved Class of Charge Analogue of Adler’s Relativistic Exact Solution

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Modern Physics 2011年第6期2卷 481-487页

作者： Mamta Joshi Pant Bipin Chandra tewari 不详

We present a well behaved class of charge analogue of Alder’s (1974). This solution describes charge fluid balls with positively finite central pressure and positively finite central density;their ratio is less than one and causality condition is obeyed at the centre. The outmarch of pressure, density, pressure-density ratio and the adiabatic speed of sound is monotonically decreasing, however, the electric intensity is monotonically increasing in nature. The solution gives us wide range of parameter K (0.96 ≤ K ≤ 5.2) for which the solution is well behaved and appropriate for relativistic theory;therefore, suitable for modeling of super dense star. For this solution the mass of a star is maximized with all degrees of suitability and by assuming the surface density ρb = 2 × 1014 g/cm3. Corresponding to K = 0.96 and X = 0.35, the maximum mass of the star comes out to be 3.43 MΘ with linear dimension 32.66 Km and central redshift and surface redshift 1.09374 and 0.5509 respectively.

关键词： Charge Fluid Reissner-Nordstrom General Relativity Exact Solution

Seasonal effect on rooting behaviour of important bamboo species byculm cuttings

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Forestry Research 2012年第3期23卷 441-445页

作者： Y.A.Gulabrao R Kaushal S.K.tewari J.M.S.Tomar O.P.Chaturvedi G.B.Pant University of Agriculture&Technology Pantnagar 263145India Central Soil and Water Conservation Reserach&Training Institute Dehradun 248195India

We investigated the influence of season on the rooting be- haviour of eight important bamboo species viz., Bambusa balcooa, B. bambos, B. nutans, B. tuMa, B. vulgaris, Dendrocalamus giganteus, D. hamiltonii and D. strictus. We collected 2-3 node culm cuttings in three growing seasons viz. spring （March）, summer （June） and rainy （August） from superior candidate plus clumps （CPCs） centralized in the germplasm garden. Cuttings were placed horizontally in sand and were provided with intermittent misting at regular intervals. Bamboo species exhibited differential rhizogenesis behavior in different seasons. The study reveals significant variation in sprouting and rooting behaviour in different bamboo species. B. bambos had maximum rooting （78.89%）, followed by B. vulgaris （74.44%）. In general, the potential of different bamboo species for rooting was found to be in the order： B. bambos 〉 B. vulgaris 〉 B. balcooa 〉 D. hamiltonii 〉 B. tulda 〉 D. strictus 〉 D. giganteus 〉B. nutans. The maximum rooting was recorded in spring （56.67%）, which was closely followed by summer （54.58%）. In winter season, minimum rooting （36.67%） was observed. The interaction effect of species x season was also significant on sprouting and rooting pa- rameters. In B. balcooa, B. nutans, B. vulgaris, D. hamiltonii and D. strictus, cuttings collected in summer season showed maximum sprouting and rooting, whereas, B. bambos, B. tulda and D. giganteus had maximum rooting in spring. The maximum number of roots developed per cutting was observed in B. tulda （43.8） during spring season.

关键词： bamboos culm cutting rooting season sprouting

Influence of C-Axis Inter Unit Cell Resonant Tunneling on the Spectral Function in Bilayer Cuprates

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Physics 2011年第7期2卷 759-765页

作者： Ajay - B. S. tewari Govind - 不详

The role of intra unit cell coupling along with inter unit cell resonant tunneling between the copper-oxygen planes on the electronic spectral function in normal state of bilayer high Tc cuprates like Bi2Sr2CaCu2O8+x is investigated. The Hubbard model including terms representing hopping between the planes within the unit cell, and resonant tunneling between the planes in two adjoining cells is used along with the Green’s function equation of motion approach to obtain an expression of spectral function. The spectral function at (π,0) point of the Brillouin zone is numerically calculated. It is found that the intra unit cell coupling lead to splitting of spectral peak especially close to (π,0) point, while the inter unit cell resonant tunneling lead to a broadening in the spectral function and suppression of bilayer splitting in the normal state. In the presence of finite electron correlations the inter unit cell tunneling induce strong broadening in the spectral features. The electron correlations and inter unit cell tunneling is important in determining the shape of the spectral function in doped bilayer cuprates. These results are viewed in terms of the existing ARPES measurements on bilayer cuprates.

关键词： Multilayer Superconductors Electronic Structure Strongly Correlated Systems

An <i>in Vitro</i>Approach for the Conservation of <i>Meizotropis pellita</i>: An Endangered and Endemic Plant

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Plant Sciences 2013年第6期4卷 1233-1240页

作者： Lalit Singh Tapan Kumar Nailwal Lalit tewari Department of Biotechnology Bhimtal Campus Kumaun University Nainital India Department of Botany D.S.B. Campus Kumaun University Nainital India.

An efficient protocol for high frequency in vitro regeneration of Meizotropis pellita an endangered and endemic plant was developed. In vitro germination of the seeds of Patwa was achieved successfully after incubation for 10 -15 days and plantlets up to a height of 5 -7 cm with profuse rooting were observed after incubation for 7 weeks in hormone free MS medium. This in vitro germination totally reduced contamination that used to occur in the explant taken from the field. Callus induction and proliferation were observed in leaf explants after 15 -20 days of incubation in MS medium containing 2 -4, D (9.06 μM) alone or in combination with 2 -4, D (9.06 μM) + 2-iP (7.38 μM). Shoot regeneration was achieved from 2 months old callus explant in MS medium supplemented with BA (17.6 μM) + GA3 (1.0 μM). Shoot multiplication was also achieved from cotyledonary node of M. pellita in MS medium supplemented with Kinetin + GA3 (4.6 μM + 1.0 μM) or BA (13.2, 17.6 μM) + GA3 (1.0 μM) after 30 -45 days of incubation. IBA (4.9 μM) was more effective in root regeneration from micro shoots. The plantlets after acclimatization over a period of 1 month were further hardened in a polyhouse for two months. On the basis of available literature this is the first and significant study regarding the comparative effect of different PGRs on in-vitro propagation of Meizotropis pellita by using different explants and their subsequent effect on rooting. This significant study could be useful for large scale production of successfully hardened plants and conservation of this shrub.

关键词： Patwa Patwadanger Meizotropis pellita

Dissipative Spherical Gravitational Collapse of Isotropic Fluid

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Modern Physics 2015年第4期6卷 453-462页

作者： B. C. tewari Kali Charan Department of Mathematics Kumaun University S.S.J. Campus Almora India

We present a number of parametric class of exact solutions of a radiating star and the matching conditions required for the description of physically meaningful fluid. A number of previously known class of solutions have been rediscovered which describe well behaved nature of fluid distributions. The interior matter fluid is shear-free spherically symmetric isotropic and undergoing radial heat flow. The interior metric obeyed all the relevant physical and thermodynamic conditions and matched with Vaidya exterior metric over the boundary. Initially the interior solutions represent a static configuration of perfect fluid which then gradually starts evolving into radiating collapse. The apparent luminosity as observed by the distant observer at rest at infinity and the effective surface temperature are zero in remote past at the instant when collapse begins and at the stage when collapsing configuration reaches the horizon of the black hole.

关键词： Exact Solutions Radiating Star Gravitational Collapse Black Hole

Inflammation and Its Role in Prostate Cancer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Cancer Therapy 2014年第9期5卷 836-844页

作者： Rakesh K. Mishra Ashutosh K. tewari Department of Urology Icahn School of Medicine at Mount Sinai New York USA

Infections and inflammatory responses are linked to 20% - 300% of all deaths from cancer worldwide. Inflammatory responses play crucial roles at different stages of tumor development, including initiation, promotion, malignant conversion, invasion, and metastasis. Several studies point to an important role of inflammation in prostate growth, although the contribution of inflammation to benign prostate cancer is not completely understood. The basic and clinical research in the area, trying to understand the etiology of prostatic inflammation and its signaling pathway may help to develop the novel therapeutic interventions against prostate cancer development triggered by inflammation.

关键词： Prostate Cancer Inflammation Signaling

Spherical Gravitational Collapse of Anisotropic Radiating Fluid Sphere

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Astronomy and Astrophysics 2016年第2期6卷 155-165页

作者： B. C. tewari Kali Charan Jyoti Rani Department of Mathematics Kumaun University SSJ Campus Almora India Department of Mathematics SRMS College of Engineering and Technology Bareilly India

We here present a relativistic model for a spherically symmetric anisotropic fluid to study the various factors of physical and thermal phenomenon during the evolution of a collapsing star dissipating energy in the form of radial heat flow. We also proposed a table of some new parametric class of solutions which will be useful for constructing the new compact star models. The constructed algorithm obeys all the relevant requirements of a realistic model and matched with Vaidya exterior metric over the boundary. At the initial stage the interior solutions represent a static configuration of perfect fluid which then gradually starts evolving into radiating collapse. The apparent luminosity as observed by the distant observer at rest at infinity and the effective surface temperature are zero in remote past at the instant when collapse begins and at the stage when collapsing configuration reaches the horizon of the black hole.

关键词： Exact Solutions Anisotropic Fluid Spherical Gravitational Collapse Black Hole