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排序方式: 共有243条查询结果,搜索用时 62 毫秒
111.
Sarkar NR Rosendahl T Krueger AB Banerjee AL Benton K Mallik S Srivastava DK 《Chemical communications (Cambridge, England)》2005,(8):999-1001
A triggered release methodology of liposomal contents via the enzyme MMP-9 is described. 相似文献
112.
Non-singular static solutions for the SU(2) Yang-Mills field equations in the presence of external sources are presented. These solutions possess energies less than those of the magnetic dipole solutions, and can in fact have vanishingly small energies. 相似文献
113.
Natural frequencies and normal modes are obtained for in-plane, inextensional vibrations of a thin circular ring with equi-spaced, identical radial supports. A wave approach is used. Natural frequencies are determined from the propagation constants of the ring by considering it as an endless periodic structure. Normal modes are obtained by superposition of a pair of opposite-going free wave groups. Numerical results have been presented for both rigid and circumferentially guided supports. It has been shown that at certain frequencies two different natural modes can exist. This has been verified experimentally. 相似文献
114.
Adler J Bai Z Blaylock GT Bolton T Brient J Browder TE Brown JS Bunnell KO Burchell M Burnett TH Cassell RE Coffman D Cook V Coward DH DeJongh F Dorfan DE Drinkard J Dubois GP Eigen G Einsweiler KF Eisenstein BI Freese T Gatto C Gladding G Grab C Hauser J Heusch CA Hitlin DG Izen JM Kim PC Köpke L Labs J Li A Lockman WS Mallik U Matthews CG Mincer AI Mir R Mockett PM Nemati B Odian A Parrish L Partridge R Pitman D Plaetzer SA Richman JD Sadrozinski HF Scarlatella M Schalk TL Schindler RH 《Physical review letters》1990,64(22):2615-2618
115.
Coffman D DeJongh F Dubois GP Eigen G Hitlin DG Matthews CG Mincer A Richman J Weinstein AJ Wisniewski WJ Zhu Y Bolton T Bunnell KO Cassell RE Coward DH Kim PC Labs J Odian A Pitman D Schindler RH Toki W Wasserbaech S Drinkard JJ Gatto C Heusch CA Lockman WS Scarlatella M Sadrozinski HF Schalk TL Seiden A Weseler S Eisenstein BI Freese T Gladding G Izen JM Stockdale IE Tripsas B Mallik U Wang MZ Brown J Burnett TH Li AD Mir R Mockett PM Nemati B Parrish L Willutzki H 《Physical review D: Particles and fields》1992,45(7):2196-2211
116.
K. M. Biswas R. N. Dhara H. Mallik S. Halder A. Sinha-Chaudhuri A. Saha D. Ganguly P. De A. S. Brahmachari 《Monatshefte für Chemie / Chemical Monthly》1996,127(1):111-116
Summary The number of carbons represented by each signal of the phenylindoles1,4, and5 is measured quantitatively by integration of their13C NMR spectra, recorded after adding chromium(III) acetylacetonate to the sample solutions as a paramagnetic relaxation agent. Their carbon chemical shifts are assigned unambiguously; the literature assignments of4 are confirmed. By a comparative study of the carbon chemical shifts of1,4, and5, those of2 and3 are also assigned. Theortho carbons of the phenyl group of4 resonate upfield with respect to thepara carbon. Theortho carbons of the 2- and 3-phenyl moieties of1–3 and5, however, are found to absorb downfield from the correspondingpara carbons, probably because of steric and/or electronic effects exerted by their neighbouring phenyl group.
Kernresonanzspektroskopie, 6. Mitt. Einige quantitative Anwendungen der13C-NMR-Spektroskopie auf Phenylindole
Zusammenfassung Die Anzahl der durch jedes Signal der Phenylindole1,4 und5 repräsentierten Kohlenstoffatome wird durch Integration der nach Zusatz von Chrom(III)acetonylacetat als Relaxationsreagens aufgenommenen13C-NMR-Spektren bestimmt. Ihre chemischen Verschiebungen werden eindeutig zugeordnet; die Literaturwerte für4 werden bestätigt. Durch eine vergleichende Untersuchung der13C-chemischen Verschiebungen von1,4 und5 können jene von2 und3 ebenfalls zugeordnet werden. Dieortho-Kohlenstoffe der Phenylgruppe von4 sind gegenüber denpara-Kohlenstoffatomen zu höherem Feld verschoben. Für die 2- und 3-Phenyl-Substituenten von1–3 und5 kehren sich die Verhältnisse um, wahrscheinlich wegen sterischer und/oder elektronischer Effekte der benachbarten Phenylgruppe.相似文献
117.
Sahoo Sumanta Kumar Ratha Satyajit Rout Chandra Sekhar Mallik Archana 《Journal of Solid State Electrochemistry》2016,20(12):3415-3428
Journal of Solid State Electrochemistry - The study emphasizes on the scalable production and comparison of few layered graphene nanosheets (FLGNSs). The FLGNSs have been electrochemically... 相似文献
118.
Mosim Ansari Samapika Mallik Achintya Jana Alpana Nayak Neeladri Das 《Journal of polymer science. Part A, Polymer chemistry》2021,59(23):2959-2971
We report herein a new triptycene derivative ( 1 ) with an azo functional group. This molecule has been used as a monomer to yield two linear polymers ( TAFPs ) that have several triptycene units dangling from the linear polymer chain. TAFPs are soluble in organic solvents and are thermally stable. TAFPs can be cast into thin films. Further, these polymers are fluorescent with emission intensity increasing upon irradiation with ultraviolet light due to photoisomerization of the azo groups present in them. The fluorescence of TAFPs are quenched in the presence of C60, which supports their strong affinity for each other. Since both TAFP1 and TAFP2 form stable thin films of uniform thickness over large area coupled with their interaction with C60, these polymers may find potential applications in the development of optoelectronic devices or as molecular sensors in supramolecular chemistry. 相似文献
119.
Amal Bouraoui Rosy Ghanem Dr. Mathieu Berchel Dr. Véronique Vié Yann Le Guen Gilles Paboeuf Dr. Laure Deschamps Dr. Tony Le Gall Prof. Dr. Tristan Montier Prof. Dr. Paul-Alain Jaffrès 《Chemphyschem》2019,20(17):2187-2194
Cationic amphiphiles featuring two thioether functions in each lipid chain of bicatenar cationic amphiphiles are reported here for the first time. The physicochemical properties and transfection abilities of these new amphiphiles were compared with those of already reported analogues featuring either (i) saturated, (ii) unsaturated or (iii) mono-thioether containing lipid chains. The homogeneity of the series of new compounds allowed to clearly underscore the effect of bis-thioether containing lipid chains. This study shows that besides previous strategies based on unsaturation or ramification, the incorporation of two thioether functions per lipid chain constitutes an original complementary alternative to tune the supramolecular properties of amphiphilic compounds. The potential of this strategy was evaluated in the context of gene delivery and report that two cationic amphiphiles (i. e. 4 a and 4 b) can be proposed as new efficient transfection reagents. 相似文献
120.
Thander A Basak D Mallik B 《Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy》2004,60(10):2393-2398
The changes in the electronic absorption spectra (UV-Vis) (after photoexcitation) of poly(methyl methacrylate) (PMMA) thin films doped with a metallocene and containing chloroform molecules as impurities, have been studied as a function of photoexcitation wavelength (210-750 nm), photoexcitation time (duration), amount of metallocene in the film and amount of chloroform molecules present in the film. Photoeffects on the metallocenes have been observed, which depend significantly on the nature of the central metal atom of the metallocene and the results have been discussed on the basis of the electronic configuration of the metallocenes, which is under study. 相似文献