201
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Kolsia A, Naka K, Papafaklis M, Bourantas C, Tzimas T, Vakalis K, Fotiadis D, Michalis L. Tu-P10:517 Aortic pulse wave velocity as a predictor of the presence of CAD in subjects with suspected CAD and relationship with the metabolic syndrome. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)81217-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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202
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Wang X, Naka K, Wang C, Itoh H, Uemura T, Chujo Y. Layer-by-layer films based on charge transfer interaction of φ-conjugated poly(dithiafulvene) and incorporation of gold nanoparticles into the films. J Appl Polym Sci 2006. [DOI: 10.1002/app.24638] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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203
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Wang X, Naka K, Zhu M, Itoh H, Chujo Y. Microporous nanocomposites of Pd and Au nanoparticles via hierarchical self-assembly. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:12395-8. [PMID: 16343019 DOI: 10.1021/la0521387] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Microporous nanocomposites of Pd and Au nanoparticles were generated by utilizing electrostatic interaction between oppositely charged Au nanoparticles coated with carboxylate groups (Au-COO-) and spherical aggregates of Pd nanoparticles (Pd- NH3+) with a mean diameter of 80+/-20 nm stabilized and cross linked by octa(aminopropyl)silsesquioxane octahydrochloride (POSS-NH3+). Amide bonds were formed between the reactive ion couples that are well defined in the Pd-Au colloidal nanocomposites during a subsequent chemical reaction to generate more stable nanocomposites with improved chemical and physical properties.
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204
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Morisaki Y, Ouchi Y, Fukui T, Naka K, Chujo Y. Synthesis of oligomers including eight P-chiral centers and the construction of the 12-phosphacrown-4 skeleton. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.08.039] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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205
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Naka K, Itoh H, Chujo Y. Self-Assembly of Gold Nanoparticles Utilizing a Charge-Transfer Interaction between Carbazolyl and Dinitrophenyl Units. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2005. [DOI: 10.1246/bcsj.78.501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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206
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Naka K, Inagi S, Uemura T, Chujo Y. Amphiphilic Tetrathiafulvalene Derivative: Charge-Transfer Complexation Behavior in Solutions. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2005. [DOI: 10.1246/bcsj.78.519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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207
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Naka K, Inagi S, Chujo Y. Synthesis of soluble electron-donating polymers containing vinylogous TTF by oxidative dimerization of 1,4-bisdithiafulvenyl-2,5-dialkoxybenzene. ACTA ACUST UNITED AC 2005. [DOI: 10.1002/pola.20938] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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208
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Naka K, Itoh H, Chujo Y. Self-organized Wire-like Aggregates of Palladium Nanoparticles with Poly(amidoamine)dendrimer. CHEM LETT 2004. [DOI: 10.1246/cl.2004.1236] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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209
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Ohnishi S, Gu FL, Naka K, Imamura A, Kirtman B, Aoki Y. Calculation of Static (Hyper)polarizabilities for π-Conjugated Donor/Acceptor Molecules and Block Copolymers by the Elongation Finite-Field Method. J Phys Chem A 2004. [DOI: 10.1021/jp047935c] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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210
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Naka K, Itoh H, Chujo Y. Preparation of Gold Nanoparticles Protected by a Cubic Silsesquioxane and Their Monolayer Formation on a Glass Substrate. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2004. [DOI: 10.1246/bcsj.77.1767] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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211
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Naka K, Itoh H, Park SY, Chujo Y. Synthesis of Nanocomposites of Metal Nanoparticles Utilizing Miscible Polymers. Polym Bull (Berl) 2004. [DOI: 10.1007/s00289-004-0269-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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212
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Umeyama T, Naka K, Chujo Y. Spontaneous Ring-Collapsed Alternating Copolymerization of a Homocyclic Arsenic Compound and Phenylacetylene. Macromolecules 2004. [DOI: 10.1021/ma049113j] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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213
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Umeyama T, Naka K, Chujo Y. Radical Terpolymerization of Organoarsenic Homocycle, Phenylacetylene, and Vinyl or Butadienyl Monomers. Macromolecules 2004. [DOI: 10.1021/ma0356921] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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214
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Naka K, Keum DK, Tanaka Y, Chujo Y. Control Crystallization of Calcium Carbonate in Aqueous Solution with In-Situ Radical Polymerization of Sodium Acrylate as a Latent Inductor for Crystal Nucleation and Growth. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2004. [DOI: 10.1246/bcsj.77.827] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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215
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Itoh H, Tahara A, Naka K, Chujo Y. Photochemical assembly of gold nanoparticles utilizing the photodimerization of thymine. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:1972-1976. [PMID: 15801470 DOI: 10.1021/la0359777] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Irradiation of UV light to the solution of gold nanoparticles modified with thymine units resulted in the formation of aggregates comprising chemical cross-linking gold nanoparticles through the photodimerization of the thymine units. Transmission electron microscopy and UV-visible absorption measurement showed the aggregates consisting of the gold nanoparticles. The effect of thymine unit density on the nanoparticle surface and the concentration of the gold nanoparticles in solution to the aggregation process were studied by UV-visible absorption measurement.
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216
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Wang X, Naka K, Itoh H, Chujo Y. Self-organized Nanocomposites of Functionalized Gold Nanoparticles with Octa(3-aminopropyl)octasilsesquioxane. CHEM LETT 2004. [DOI: 10.1246/cl.2004.216] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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217
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Keum DK, Naka K, Chujo Y. The Sea Urchin-shaped CaCO3via Template Mineralization on Surface-functionalized Vaterite Particles by Tiopronin-protected Gold Nanoparticles. CHEM LETT 2004. [DOI: 10.1246/cl.2004.310] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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218
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Itoh H, Naka K, Chujo Y. Synthesis of Gold Nanoparticles Modified with Ionic Liquid Based on the Imidazolium Cation. J Am Chem Soc 2004; 126:3026-7. [PMID: 15012113 DOI: 10.1021/ja039895g] [Citation(s) in RCA: 365] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The synthesis and processing of nanoparticles consisting of metallic nanocrystal cores and organic monolayer shells promise interesting technological applications. Here, we report the synthesis of gold nanoparticles modified with ionic liquids based on the imidazolium cation. Aggregation-induced color changes of the gold nanoparticles in an aqueous solution were used as an optical sensor for anions via anion exchange of ionic liquid moiety. We also demonstrated the phase transfer of the gold nanoparticles from aqueous media to ionic liquid.
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219
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Umeyama T, Naka K, Nakahashi A, Chujo Y. Radical Copolymerization of Acetylenic Compounds with Phenyl-Substituted Cyclooligoarsine: Substituent Effect and Optical Properties. Macromolecules 2004. [DOI: 10.1021/ma035282c] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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220
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Umeyama T, Naka K, Chujo Y. Radical copolymerization of cyclic diarsine with vinyl monomers. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/pola.20092] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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221
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Umeyama T, Naka K, Chujo Y. Synthesis of poly(vinylene arsine)s through the ring-collapsed radical alternating copolymerization of an organoarsenic homocycle with aliphatic acetylenes and their properties. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/pola.20240] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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222
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Kalef-Ezra J, Michalis L, Bozios G, Tsekeris P, Katsouras CS, Naka K, Pappas C, Sideris DA. Effects of delayed (24 h postintervention) β-irradiation therapy after coronary angioplasty and stenting in de novo native coronary artery lesions. ACTA ACUST UNITED AC 2003; 4:176-81. [PMID: 15321054 DOI: 10.1016/j.carrad.2003.12.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2003] [Accepted: 12/23/2003] [Indexed: 11/24/2022]
Abstract
BACKGROUND The effects of brachytherapy performed 24 h postintervention in de novo native coronary artery lesions. METHODS AND RESULTS Thirty-nine patients with 39 de novo coronary artery lesions were randomised to prompt (immediately after intervention, n=21) or delayed (24 h later, n=18) beta brachytherapy ((90)Sr/(90)Y) after been successfully revascularized with stenting. Clinical follow-up data up to 21 months (median time) were compared. After irradiation and at 6-month follow-up, paired volumetric analysis of the stented segment and the 5-mm proximal and distal reference segments was performed; this included measurements of the external elastic membrane, lumen, plaque, and media (external elastic membrane minus lumen), stent and intima hyperplasia (stent minus lumen). Baseline clinical and angiographic characteristics were similar in the two groups. Postintervention measurements of stent, lumen, and intima hyperplasia volumes as well as postintervention minimum lumen cross-sectional areas were not different. In the stented segments and in the segments 5 mm proximal and distal to the stent, similar changes of all IVUS measurements were measured in the two patient groups, but in the lumen volume at the proximal stent edge of patients irradiated 24 h postinjury. At 21 months median follow-up time, target lesion revascularization (TLR) was performed in 8 patients (38%) in the prompt irradiation group compared with 3 (17%) in the delayed (P=.17). CONCLUSION Beta irradiation is similarly effective whether performed immediately after percutaneous coronary intervention or 24 h later.
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223
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Naka K, Chujo Y. Effect of anionic dendrimers on the crystallization of calcium carbonate in aqueous solution. CR CHIM 2003. [DOI: 10.1016/j.crci.2003.08.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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224
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Keum DK, Naka K, Chujo Y. Effect of Anionic Polyamidoamine Dendrimers on the Crystallization of Calcium Carbonate by Delayed Addition Method. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2003. [DOI: 10.1246/bcsj.76.1687] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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225
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Okuda M, Uemura Y, Naka K, Tatsumi N. Preparation of a purified fibrinogen calibration material for Clauss method and turbidimetric immunoassay possessing biological activity and antigenicity. CLINICAL AND LABORATORY HAEMATOLOGY 2003; 25:167-72. [PMID: 12755793 DOI: 10.1046/j.1365-2257.2003.00513.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Fibrinogen plays a major role in basic coagulation tests such as prothrombin time (PT), activated partial thromboplastin time (APTT) and thrombin time (TT). These show high interlaboratory variation because of inaccurate instrumental calibration. The same is true of the fibrinogen assay, despite its being a quantitative assay. Most medical laboratories use automated coagulometers and commercially available calibration materials (calibrators) to obtain an accurate fibrinogen value, but, when checked, calibrators have been found to deviate from the assigned value. The Japan Society of Laboratory Medicine (JSLM) has identified the need for a reliable plasma fibrinogen standard. To enhance the reliability of calibrator fibrinogen values and thereby remedy the poor precision and accuracy of plasma fibrinogen testing, we undertook the preparation of a standard calibration material applicable to both the Clauss method and turbidimetric immunoassay (TIA). The calibrator was prepared from fresh human plasma by glycine precipitation and virus inactivation followed by affinity chromatography to remove contaminated plasminogen. In the resulting product, clottable fibrinogen accounted for 95% of total protein and within-run precision showed a CV of less than 1.8%. We believe the preparation will become a candidate material for laboratory and manufacturer use in Japan.
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