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排序方式: 共有382条查询结果,搜索用时 15 毫秒
71.
N C Soni Ram Prasad Ashok Mohan M D Vora S Banerjee C V Tomy S K Malik H S Yadav K R K Rao 《Pramana》1989,32(6):801-809
Superconducting oxide-copper monoliths have been fabricated by shock-wave loading using cylindrical and plane geometries.
Bulk densities up to 96% T.D. have been obtained by varying detonation parameters. The superconducting properties, interface
bonding and microstructure of the compacts have been evaluated. 相似文献
72.
Parshant Batham S B Roy Shailendra Kumar A K Pradhan A K Grover P Chaddah Ram Prasad N C Soni 《Pramana》1995,45(3):261-269
Results are presented for study of nonlinear magnetization of a sintered YBa2Cu3O7−y pellet of different thickness of a sample subjected to very low magnetic field. On cooling the sample belowT
c in zero field a change, in the oscillatory structure of harmonics in increasing dc field is observed in very low ac magnetic
field. The effect of finiteness of the sample on the oscillatory structure and on the hysteresis of harmonics is also studied.
The results are explained qualitatively. 相似文献
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Hypochlorite‐Mediated Modulation of Photoinduced Electron Transfer in a Phenothiazine–Boron dipyrromethene Electron Donor–Acceptor Dyad: A Highly Water Soluble “Turn‐On” Fluorescent Probe for Hypochlorite 下载免费PDF全文
Disha Soni Naresh Duvva Deepak Badgurjar Dr. Tapta Kanchan Roy Dr. Surendra Nimesh Geeta Arya Dr. Lingamallu Giribabu Dr. Raghu Chitta 《化学:亚洲杂志》2018,13(12):1594-1608
A highly water‐soluble phenothiazine (PTZ)–boron dipyrromethene (BODIPY)‐based electron donor–acceptor dyad ( WS‐Probe ), which contains BODIPY as the signaling antennae and PTZ as the OCl? reactive group, was designed and used as a fluorescent chemosensor for the detection of OCl?. Upon addition of incremental amounts of NaOCl, the quenched fluorescence of WS‐Probe was enhanced drastically, which indicated the inhibition of reductive photoinduced electron transfer (PET) from PTZ to 1BODIPY*; the detection limit was calculated to be 26.7 nm . Selectivity studies with various reactive oxygen species, cations, and anions revealed that WS‐Probe was able to detect OCl? selectively. Steady‐state fluorescence studies performed at varied pH suggested that WS‐Probe can detect NaOCl and exhibits maximum fluorescence in the pH range of 7 to 8, similar to physiological conditions. ESI‐MS analysis and 1H NMR spectroscopy titrations showed the formation of sulfoxide as the major oxidized product upon addition of hypochlorite. More interestingly, when WS‐Probe was treated with real water samples, the fluorescence response was clearly visible with tap water and disinfectant, which indicated the presence of OCl? in these samples. The in vitro cell viability assay performed with human embryonic kidney 293 (HEK 293) cells suggested that WS‐probe is non‐toxic up to 10 μm and implicates the use of the probe for biological applications. 相似文献