Michito Yoshizawa  Junichi Nakagawa  Kazuhisa Kumazawa  Muneki Nagao  Masaki Kawano  Tomoji Ozeki  Makoto Fujita 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2005,117(12):1844-1847

  相似文献   

    

Atsushi Toyota  Tadashi Yamaguchi  Asako Igashira‐Kamiyama  Tatsuya Kawamoto  Takumi Konno 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2005,117(7):1112-1116

  相似文献   

    

Takanori Ushio  Rui Tamura  Hiroki Takahashi  Nagao Azuma  Keiji Yamamoto 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》1996,108(20):2544-2546

  相似文献   

    

Arisawa M  Terada Y  Nakagawa M  Nishida A 《Angewandte Chemie (International ed. in English)》2002,41(24):4732-4734

  相似文献   

    

Fumie Takei  Hiroko Hayashi  Kiyotaka Onitsuka  Nagao Kobayashi  Shigetoshi Takahashi 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2001,113(21):4216-4218

  相似文献   

    

Masatsugu Ayabe  Atsushi Ikeda  Yohei Kubo  Masayuki Takeuchi  Seiji Shinkai 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2002,114(15):2914-2916

  相似文献   

    

Junichi Kondo  Atsushi Inoue  Hiroshi Shinokubo  Koichiro Oshima 《Angewandte Chemie (International ed. in English)》2001,40(11):2085-2087

  相似文献   

    

Kojima C  Hirano Y  Yuba E  Harada A  Kono K 《Colloids and surfaces. B, Biointerfaces》2008,66(2):246-252

Gold nanoparticles (Au NPs), which are extremely useful materials for imaging and photothermal therapy, typically require a drug delivery system to transport them to the affected tissue and into the cells. Since liposomes are approved as drug carriers, complexes of liposomes with Au NPs were considered ideal solutions to deliver Au NPs to the target site in vivo. In this study, we prepared complexes of various liposomes with Au NPs via physical absorption and characterized them. The time dependency of the surface plasmon resonance of this complex, which is a unique property of Au NPs, shows that the liposomes promote the formation of stable dispersions of Au NPs under isotonic conditions, even though intact Au NPs aggregate immediately. From a release assay of calcein from liposomes and transmission electron microscopy analysis, the Au NPs were complexed with liposomes without membrane disruption. These complexes could be formed by using cationic liposomes and polyethylene glycol-modified liposomes, as well as by using phosphatidylcholine liposomes, which are useful for drug and gene delivery. We proposed this kind of complex as a nanomedicine with diagnostic and therapeutic ability.  相似文献   

    

Takagai Y  Takahashi A  Yamaguchi H  Kubota T  Igarashi S 《Journal of colloid and interface science》2007,313(1):359-362

Adsorption behaviors of the high-valence metal ions Zr(IV), Hf(IV), Ti(IV), V(V), Nb(V), Ta(V), and Mo(IV) on desferrioxamine B (DFB) immobilization nylon 6,6 chelate fiber was investigated under highly acidic conditions. Though the complexes of DFB and the high-valence metal ions were extracted without selectivity by solvent extraction, the only zirconium ions showed higher adsorption percentages than that of other high-valence metal ions on the DFB immobilization nylon 6,6 chelate fiber. Adsorption properties were caused that limited the freedom of DFB by chemical immobilization. Especially, hafnium ions and zirconium ions, which have similar chemical properties, showed different adsorption behavior in highly acidic aqueous solutions. Zirconium ions were quantitatively adsorbed up to 13.5 micromol/g.  相似文献   

    

Kobayashi T  Yabushita A  Saito T  Ohtani H  Tsuda M 《Photochemistry and photobiology》2007,83(2):363-368

By using a sub-5-fs visible laser pulse, we have made the first observation of the vibrational spectra of the transition state during trans-cis isomerization in the retinal chromophore of bacteriorhodopsin (bR(S68). No instant isomerization of the retinal occurs in spite of electron promotion from the bonding pi-orbital to the anti-bonding pi*-orbital. The difference between the in-plane and out-of-plane vibrational frequencies (about 1150-1250 and 900-1000 cm(-1), respectively) is reduced during the first time period. The vibrational spectra after this period became very broad and weak and are ascribed to a \"silent state.\" The silent state lasts for 700-900 fs until the chromophore isomerizes to the cis-C13 = C14 conformation. The frequency of the C = C stretching mode was modulated by the torsion mode of the C13 = C14 double bond with a period of 200 fs. The modulation was clearly observed for four to five periods. Using the empirical equation for the relation between bond length and stretching frequency, we determined the transitional C = C bond length with about 0.01 angstroms accuracy during the torsion motion around the double bond with 1-fs time resolution.  相似文献