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| 1 | MRI引导下超声聚焦对痛性骨转移瘤的姑息治疗显示文摘目的对标准治疗无效或不能进行标准治疗的痛性骨转移瘤病人进行MRI引导下超声聚焦姑息治疗的安全性和初期疗效的评估。 | D.Gianfelice C.Gupta W.Kucharczyk P.Bret D.Havill M.Clemons 赵静 | 2008 | 国际医学放射学杂志2008,31,A06: | 7 |
| 2 | Studies on impact sensitivity of nanosized trinitrotoluene (TNT) confined in silica processed by sol-gel method显示文摘Nano-sized trinitrotoluene(TNT) material restrained in silica gel has been prepared by using the sol-gel process to study the effect of varying porosity in gel on the sensitivity of TNT. The TNT content in the gel has been varied from 60 to 90 wt %(at fixed acetone/tetramethoxysilane ratio of 50). Also, for a fixed TNT content of 75 wt %, the pore structure in the gel has been varied by changing the ratio of silica gel precursor to the solvent. The resultant TNT–silica gel composites have been characterized using scanning electron microscopy, thermal analysis, small angle X-ray scattering and surface area analysis techniques. Impact sensitivity studies were carried out using Fall Hammer Impact Test. The results showed that the sensitivity of nanostructured explosives prepared by sol-gel process can be tailored precisely by controlling the process parameters. | s.v.ingale p.b.wagh p.u.sastry c.b.basak d.bandyopadhyay s.b.phapale satish c.gupta | 2016 | Defence Technology(防务技术)2016,12,1: | 1 |
| 3 | Toxic Potential of Palytoxin显示文摘This review briefly describes the origin,chemistry,molecular mechanism of action,pharmacology,toxicology,and ecotoxicology of palytoxin and its analogues. Palytoxin and its analogues are produced by marine dinoflagellates. Palytoxin is also produced by Zoanthids(i.e. Palythoa),and Cyanobacteria(Trichodesmium). Palytoxin is a very large,non-proteinaceous molecule with a complex chemical structure having both lipophilic and hydrophilic moieties. Palytoxin is one of the most potent marine toxins with an LD50 of 150 ng/kg body weight in mice exposed intravenously. Pharmacological and electrophysiological studies have demonstrated that palytoxin acts as a hemolysin and alters the function of excitable cells through multiple mechanisms of action. Palytoxin selectively binds to Na+/K+-ATPase with a Kd of 20 p M and transforms the pump into a channel permeable to monovalent cations with a single-channel conductance of 10 p S. This mechanism of action could have multiple effects on cells. Evaluation of palytoxin toxicity using various animal models revealed that palytoxin is an extremely potent neurotoxin following an intravenous,intraperitoneal,intramuscular,subcutaneous or intratracheal route of exposure. Palytoxin also causes non-lethal,yet serious toxic effects following dermal or ocular exposure. Most incidents of palytoxin poisoning have manifested after oral intake of contaminated seafood. Poisonings in humans have also been noted after inhalation,cutaneous/systemic exposures with direct contact of aerosolized seawater during Ostreopsis blooms and/or through maintaining aquaria containing Cnidarian zoanthids. Palytoxin has a strong potential for toxicity in humans and animals,and currently this toxin is of great concern worldwide. | Ji?í PATOCKA Ramesh C.GUPTA 吴庆华 Kamil KUCA | 2015 | Journal of Huazhong University of Science and Technology(Medical Sciences)2015,35,5: | 1 |
| 4 | Conductive Carbon Nanofiber–Polymer Foam Structures显示文摘 | Y.Yang M.?C.Gupta K.?L.Dudley R.?W.Lawrence | 2005 | Adv Mater2005,,16: | 1 |
| 5 | Seismic response attenuation of structures using shape memory alloy dampers显示文摘 | Y. M.Parulekar G. R.Reddy K. K.Vaze S.Guha C.Gupta K.Muthumani R.Sreekala | 2012 | Struct Control Health Monit2012,,1: | 1 |
| 6 | Novel generation of 9H-furo[3,2-b]chromen-9-ones from (E)-3-hydroxy-2-styrylchromones by excited state intramolecular proton transfer显示文摘到产量的代替的(E)-3-hydroxy-2-(1 鈥 ?methyl-2 鈥 ?phenylvinyl)-4-oxo-4H-1-benzopyrans 的 Photocyclisation 线性新奇 tricyclic 9H-furo [3,2-b ] chromen-9-ones 和尖熔化 tetracyclic xanthenones 被描述。 | Surinder Berar Urmila Berar Satish C.Gupta Ramesh C.Kamboj | 2008 | Chinese Chemical Letters2008,19,7: | 0 |
| 7 | Effect of solar wind plasma parameters on space weather显示文摘Today's challenge for space weather research is to quantitatively predict the dynamics of the magnetosphere from measured solar wind and interplanetary magnetic field(IMF) conditions. Correlative studies between geomagnetic storms(GMSs)and the various interplanetary(IP) field/plasma parameters have been performed to search for the causes of geomagnetic activity and develop models for predicting the occurrence of GMSs, which are important for space weather predictions. We find a possible relation between GMSs and solar wind and IMF parameters in three different situations and also derived the linear relation for all parameters in three situations.On the basis of the present statistical study, we develop an empirical model. With the help of this model, we can predict all categories of GMSs. This model is based on the following fact: the total IMF Btotalcan be used to trigger an alarm for GMSs, when sudden changes in total magnetic field Btotaloccur. This is the first alarm condition for a storm's arrival. It is observed in the present study that the southward Bzcomponent of the IMF is an important factor for describing GMSs. A result of the paper is that the magnitude of Bzis maximum neither during the initial phase(at the instant of the IP shock) nor during the main phase(at the instant of Disturbance storm time(Dst) minimum). It is seen in this study that there is a time delay between the maximum value of southward Bzand the Dst minimum, and this time delay can be used in the prediction of the intensity of a magnetic storm two-three hours before the main phase of a GMS. A linear relation has been derived between the maximum value of the southward component of Bzand the Dst, which is Dst =(-0.06) +(7.65)Bz+ t.Some auxiliary conditions should be fulfilled with this, for example the speed of the solar wind should, on average, be 350 km s-1 to 750 km s-1, plasma β should be low and, most importantly, plasma temperature should be low for intense storms. If the plasma temperature is less than 0.5 × 106 K then the Dst value will be greater than the predicted value of Dst or if temperature is greater than 0.5 × 106 K then the Dst value will be less(some nT). | Balveer S.Rathore Dinesh C.Gupta Subhash C.Kaushik | 2015 | Research in Astronomy and Astrophysics2015,15,1: | 0 |