bluuebunny/crossref_metadata_2025_split huggingface dataset:
Novel Dinuclear Manganese(III) Complexes with Tridentate and Bridging Tetradentate Schiff Base Ligands: Preparation, Properties and Catalase-like Function
Authors: Nakamura Toshio , Niwa Kenshin , Fujiwara Manabu , Matsushita Takayuki 
Published: October 2003

Abstract
Novel dinuclear manganese(III) complexes, MnIII2(N-PhO-sal)2(X-sal-m-xylylene) (X = H, 3-MeO) have been prepared by the ligand substitution reaction and characterized, where N-PhOH-salH and X-sal-m-xylyleneH2 denote N-2-hydroxyphenylsalicylideneamine and N,N′-di-substituted-salicylidene-m-xylylenediamine, respectively. These complexes have been found to decompose hydrogen peroxide catalytically (H2O2 /Mn &lt; 100), cycling their oxidation levels between Mn2 (III,III) and Mn2 (II,II) with dioxygen evolution.
A Regio- and Stereoselective Platinum(0)-Catalyzed Hydroboration of Allenes Controlled by Phosphine Ligands
Authors: Yamamoto Yasunori , Fujikawa Ryou , Yamada Akihiko , Miyaura Norio 
Published: October 2003

Abstract
The hydroboration of terminal allenes with pinacolborane was carried out at 50 °C in the presence of a Pt(dba)2/2PR3 catalyst. The formation of one of three possible monohydroboration products was regioselectively synthesized by choosing an appropriate phosphine ligand.
Synthesis of Tetrathiafluvalene Derivatives with Photochromic Diarylethene Moieties
Authors: Uchida Kingo , Masuda Go , Aoi Yoshifumi , Nakayama Koji , Irie Masahiro 
Published: October 2003

Abstract
Tetrathiafulvalene (TTF) derivatives with diarylethene moieties have been synthesized. A derivative having 2,4,5-trimethylthiophene rings as the aryl groups showed photochromism, while a derivative with 2,5-dimethylthiophene rings did not show any color change by UV irradiation. The different reactivity was ascribed to the difference in the conformation of thiophene rings in the two derivatives.
Preparation and Properties of Organic-Inorganic Hybrid Thin Films Containing Polysilane Segments from Polysilane-methacrylate Copolymers
Authors: Matsukawa Kimihiro , Fukui Shouji , Higashi Nobuyuki , Niwa Masazo , Inoue Hiroshi 
Published: October 2003

Abstract
Photo-radical copolymerization of 3-methacryloxypropyltrimethoxysilane was carried out by using polymethylphenylsilane as a macro-photoinitiator to form polysilanemethacryloxypropyltrimethoxysilane copolymers. Organic-inorganic hybrid thin films with highly dispersed polysilane segments were successfully prepared from the copolymers by a sol-gel method. Refractive index and surface morphology of the hybrid thin films were found to change by UV irradiation.
Synthesis of New Paramagnetic Heterodinuclear Complexes with Dithiolene Bridging Ligands, (Ph2C2S2)Fe(Cp′Ru)(μ-Ph2C2S2)2 (Cp′ = η5-C5H4SiMe3(CpS1), η5-C5Me5(Cp*)), by Replacement of a Metal Fragment
Authors: Kuge Katsuaki , Inomata Shinji , Tobita Hiromi , Ogino Hiroshi 
Published: October 2003

Abstract
Thermal reactions of (Ph2C2S2)4Fe2 with Cp′2Ru2(CO)4 (Cp′ = η5-C5H4SiMe3, η5-C5Me5 (Cp*)) gave new paramagnetic heterodinuclear complexes (Ph2C2S2)Fe(Cp′Ru)(μ-Ph2C2S2)2 bridged by two dithiolene ligands.
Nonlinear Optical Properties of Some Cholesterol Based Liquid Crystals
Authors: George Mathew , Das Suresh 
Published: October 2003

Abstract
Nonlinear optical (NLO) properties of some azobenzene linked cholesterol derivatives have been described. The presence of donor and acceptor moieties imparts electrooptical and NLO properties to these molecules. Their NLO properties have been studied by electric field poling as well as hyper-Rayleigh scattering techniques. Few of these compounds exhibited NLO activity comparable to that of quartz.
The Ruthenium-Catalyzed Addition of C-H Bonds in Aromatic Nitriles to Olefins
Authors: Kakiuchi Fumitoshi , Sonoda Motohiro , Tsujimoto Takuya , Chatani Naoto , Murai Shinji 
Published: October 2003

Abstract
The reaction of aromatic nitriles with triethoxyvinylsilane proceeded in the presence of a Ru(H)2(CO)(PPh3)3-catalyst to give the corresponding C-H/olefin coupling products in high yields. The nitrile group is capable of directing the ruthenium to the ortho C-H bond via π-bonded mode.
Luminescence Retrieval of [Ru(bpy)2(HNOIP)]2+: A Novel Molecular “Light Switch” for DNA
Authors: Liu Jin-Gang , Ye Bao-Hui , Chao Hui , Zhen Qi-Xiong , Ji Liang-Nian 
Published: October 2003

Abstract
A novel molecular “light switch”, [Ru(bpy)2(HNOIP)]2+ (HNOIP = 2-(2-hydroxy-5-nitrophenyl)imidazo[4,5-f][1,10]phenanthroline), for DNA was developed. In aqueous solution the suppressed luminescence can be revived by the presence of Poly[dA]·Poly[dT], Poly[dG]·Poly[dC] and calf thymus DNA.
Unexpected Discovery of a Novel Organic Gel System Comprised of [60]Fullerene-containing Amphiphiles
Authors: Oishi Kei , Ishi-i Tsutomu , Sano Masahito , Shinkai Seiji 
Published: October 2003

Abstract
A [60]fullerene-containing amphiphile bearing two ammonium groups was synthesized. When the methanol solution was left at room temperature for a few days, it was totally transformed into an organic gel. The transformation process was fully characterized by transmission electron microscopy and X-ray diffraction. This is the first example for the [60]fullerene-containing organic gel.
Relationship between Morphology and Na+ Content of Langmuir-Blodgett Mesoscopic Tapes Induced by a Change of pH
Authors: Sano Masahito , Kamino Ayumi , Shinkai Seiji 
Published: October 2003

Abstract
Langmuir-Blodgett (LB) films of a short chain carboxyazobenzene derivative on mica exhibit nearly straight tape structures 1 nm thick, 80 nm wide, and over several μm long at pH 7.0. Lowering pH causes the tapes to be wavy and irregular without coagulation. The fraction of straight tapes at a constant salt concentration increases smoothly till pH 7, then drops sharply. Above 8, no transfer occurs. The fraction of Na per molecule in the film also increases with pH and becomes 0.5 at pH 7. The wavy tapes are found to become straight even with a slight ionization. An importance of the charge distribution rather than the total charge density is suggested.
Hydrothermal Synthesis of Ruthenium-Substituted Heteropolyanion, [SiW11O39Ru(III)(H2O)]5− as a Water Soluble Oxidation Catalyst
Authors: Higashijima Michio 
Published: October 2003

Abstract
Tris(acetylacetonate)ruthenium, Ru(acac)3, successfully reacts with the lacunary heteropolyoxometalate, K8[SiW11O39] under hydrothermal conditions (6 MPa nitrogen at 200 °C), to give the mono-substituted heteropolyanion, [SiW11O39Ru(III)(H2O)]5−. The heteropolyanion shows notable activity on the air oxidation of alkylaromatics at 200 °C in water as solvent.
Self-Assembled Monolayers of Non-Heme Diiron(III) Model Complexes on Au(111) Electrode: Synthesis and Proton-Coupled Redox Behavior in Water
Authors: Inomata Tomohiko , Abe Masaaki , Kondo Toshihiro , Umakoshi Keisuke , Uosaki Kohei , Sasaki Yoichi 
Published: October 2003

Abstract
Self-assembled monolayers (SAMs) of non-heme diiron(III) biomimetic complexes have been prepared on Au(111) electrode surfaces to explore redox properties of diiron centers in aqueous solution in a wide pH range. The diiron(III) SAMs exhibited the proton-coupled electron-transfer reaction (1H+/1e−) in water.
Carbon as an Intermediate during the Carbon Dioxide Reforming of Methane over Zirconia-Supported High Nickel Loading Catalysts
Authors: Li Xinsheng , Chang Jong-San , Park Sang-Eon 
Published: October 2003

Abstract
Ni/ZrO2 catalysts with more than 10wt % Ni loading give a birth of a large amount of carbon deposition, but the carbon plays as an intermediate to react with CO2, which is contributed to both high activity and good stability towards carbon dioxide reforming of methane.
Low-temperature Methanol Synthesis Catalyzed over Pd/CeO2
Authors: Matsumura Yasuyuki , Shen Wen-Jie , Ichihashi Yuichi , Okumura Mitsutaka 
Published: October 2003

Abstract
Methanol is effectively synthesized from carbon monoxide and hydrogen at a reaction temperature as low as 170 °C over Pd/CeO2 in which the palladium species are cationic after reduction with hydrogen at 300 °C.
Pore Size Control of High Surface-Area Silica by Use of Citric Acid
Authors: Takahashi Ryoji , Sato Satoshi , Sodesawa Toshiaki , Kawakita Machiko 
Published: October 2003

Abstract
Pore size and pore volume of an amorphous silica with high specific surface area, ca. 1000 m2g−1, can be controlled in meso scale by using citric acid as a template in sol-gel reaction of tetraethoxysilane.
Selective Intercalation of Aromatic Molecules into Alkyltrimethylammonium Ion-Intercalated Graphite Oxide
Authors: Matsuo Yoshiaki , Hatase Kazuya , Sugie Yosohiro 
Published: October 2003

Abstract
Selective intercalation of aromatic molecules into alkyltrimethylammonium-intercalated graphite oxide (GO) was investigated. While pyrene, phenanthrene and azobenzene intercalate into cetyltrimethylammonium-intercalated GO and the repeat distance along c-axis increases drastically, anthracene does not intercalate.
Synthesis and Structure of Novel Oxalate-Bridged Hexanuclear Lanthanide(III)-Chromium(III) Complexes
Authors: Zhang Xing , Cui Yong , Zheng Fakun , Huang Jinshun 
Published: October 2003

Abstract
Hexanuclear lanthanide(III)-chromium(III) complexes [Ln2(μ-ox){Cr(bipy)(μ-ox)(ox)}4(H2O)6]·13H2O (Ln = Pr 1, Gd 2) (bipy = 2,2′-bipyridine and ox = oxalate dianion) have been synthesized by reaction of [Cr(bipy)(ox)2]− building blocks with Ln(III) ions. The structure of 1 has been determined by X-ray crystallography.
Neoilludins A and B, New Bioactive Components from Lampteromyces japonicus
Authors: Kuramoto Makoto , Tsukihara Takuya , Ono Noboru 
Published: October 2003

Abstract
Neoilludins A and B were isolated from Lampteromyces japonicus, and their structures were elucidated by spectroscopic analysis. Their relative stereochemistries were also clarified by detailed analysis of proton-proton coupling constants and NOE experiments. These compounds are cytotoxic and exhibit antibacterial activity.
High Temperature in situ Raman Spectroscopy of Oxide Species in Molten (Li+K) Carbonate Eutectic
Authors: Itoh Takashi , Abe Koji , Hisamitsu Yasunari , Mohamedi Mohamed , Nishizawa Matsuhiko , Abe Takayuki , Tomczyk Piotr , Uchida Isamu 
Published: October 2003

Abstract
In situ Raman spectra of active oxygen species present in solutions of potassium superoxide (KO2) in (62 + 38) mol% (Li + K)2CO3 eutectic at 650 °C were observed. We have attempted to obtain vibrational spectra of these entities by surface enhanced Raman scattering (SERS) technique.
Specific Binding of l-Alanine onto a Monolayer Composed of Polyallylamine Containing Poly(l-alanine) Graft Chains
Authors: Higuchi Masahiro , Taguchi Kazuhiro , Kinoshita Takatoshi 
Published: October 2003

Abstract
Polyallylamine having poly(l-alanine) as hydrophobic graft chains, (PAAgPAla), formed a monolayer at an air-water interface. The morphology of the monolayer was found to be strongly dependent on the aqueous pH. In the alkaline condition, the PAAgPAla formed a stable monolayer in which the graft polypeptide chains self-assembled at the interface to yield active domains specifically interact with aqueous l-alanine compared with its d-isomer.
Template Effect of Cholesterol-based Organogels on Sol-Gel Polymerization Creates Novel Silica with a Helical Structure
Authors: Ono Yoshiyuki , Nakashima Kazuaki , Sano Masahito , Hojo Junichi , Shinkai Seiji 
Published: October 2003

Abstract
The helical structure was introduced into the silica for the first time utilizing a template effect of a cholesterol-based organogel system. It was shown that the cationic charge dilutely distributed in the organogel fibers plays an essential role.
Poly[2-(4′-decyloxylphenyl)-1,4-phenylenevinylene]: A Novel Soluble Phenyl-Substituted Poly(p-phenylenevinylene) Derivative as Electroluminescent Material
Authors: Pei Jian , Yu Wang-Lin , Huang Wei , Heeger Alan J 
Published: October 2003

Abstract
A novel soluble phenyl-substituted PPV derivative, poly[2-(4′-decyloxylphenyl)-1,4-phenylenevinylene (DOP-PPV), is synthesized, which has PL quantum efficiency of 40% and emits bright green light from single layer light-emitting diode devices (ITO/DOP-PPV/Ca or Al) with the emission maximum at 520 nm and external quantum efficiency of ca. 0.3%.
Direct Reactions of Zirconacyclopentadienes with Halosilanes as a Convenient Synthetic Method for Siloles
Authors: Kanno Ken-ichiro , Kira Mitsuo 
Published: October 2003

Abstract
Direct reactions of 1,1-bis(cyclopentadienyl)zirconacyclopentadienes with various halosilanes afford the corresponding siloles in excellent yields. The reactions are very sensitive to the steric bulkiness of both zirconacyclopentadienes and halosilanes.
Partnership experiences: Involving decision-makers in the research process
Authors: Ross Suzanne , Lavis John , Rodriguez Charo , Woodside Jennifer , Denis Jean-Louis 
Published: October 2003

Objectives To describe researchers’ experiences with involving health system managers and public policy-makers (i.e. decision-makers) in the research process, and decision-makers’ experiences with the research process, including their assessments of the benefits and costs of the involvement, and their recommendations for facilitating it. Methods We conducted semi-structured interviews with principal investigators and research staff for the seven research programmes funded by the Canadian Health Services Research Foundation in the 1999 and 2000 competition years, and with the decision-makers they involved in the research programmes. Results We identify three models of decision-maker involvement - formal supporter, responsive audience, and integral partner - each of which yielded important contributions to the research process. Four factors - the stage of the research process, time commitment required, alignment between decision-maker expertise and programme needs, and an existing relationship between the researcher and decision-maker - influenced the role played by decision-makers. Conclusions While on balance a beneficial experience, the further promotion of decision-maker involvement in the research process should involve helping researchers and decision-makers identify strategic opportunities for decision-maker involvement and support the costs associated with the involvement. Consideration should also be given to undertaking and evaluating interactions between researchers and decision-makers outside of the research process.
Creating a new articulation between research and practice through policy? The views and experiences of researchers and practitioners
Authors: Denis Jean-Louis , Lehoux Pascale , Hivon Myriam , Champagne François 
Published: October 2003

Objectives In 1990, the Quebec Social Research Council - a body financing social research in Quebec, Canada -launched a new policy encouraging the development of social research units within health care organizations. Through financial incentives, it encouraged the implementation of long-term collaborations between researchers and practitioners with the purpose of transforming both scientific knowledge production and professional practices. This paper examines the perceptions of researchers and practitioners regarding the attributes and the usefulness of this collaborative research policy. Methods A self-administered survey was sent to all the researchers (n = 146; response rate 78.1%) and practitioners (n = 204; response rate 44.1%) involved in the 21 collaborative research teams funded in 1998. T-tests were performed in order to assess the difference between the perceptions of researchers and practitioners in five key dimensions of collaborative research. Results The results showed that, contrary to expectations, researchers and practitioners shared fairly similar views regarding the various dimensions of collaborative research. They both agreed that their involvement within collaborative research teams had contributed to the development of new skills and practices but had not facilitated their participation in external activities nor their involvement in networks and organizations that influence environments in which public policies and practices are deployed. They also both encountered some difficulties in putting the dimensions that they highly valued into practice. Conclusions Collaborative research within health care organizations succeeded in fostering the implementation of new modes of knowledge production and intervention. Nevertheless, special attention needs to be given to the development of strategies to reduce the discrepancies between values and practices.
Novel mode of knowledge production? Producers and consumers in health services research
Authors: Ferlie Ewan , Wood Martin 
Published: October 2003

Objectives To investigate (1) what type of knowledge production characterizes health services research -academically based (mode 1) or socially distributed (mode 2); (2) how leaders in health services research link to users of the research; (3) how this research is influenced by its funding base; and (4) the development and dissemination strategies of investigators. Methods Four purposively selected case studies of contrasting health services research groups generated early propositions (70 interviews). These led to a postal survey of key stakeholder groups in one English National Health Service region (199 responses, 53% response rate). Results Health services research in the UK is characterized by: a mix of mode 1 and mode 2 output indicators; strong external relationship building by group leaders; a powerful driver from external finance; and extensive dissemination and development activity. Conclusions Health services researchers may have to operate in both modes. Mode 1 retains considerable defensive power, so there are limits to the extent to which mode 2 research may develop.
Risking Basin Analysis Results II. The Influence of Erosion Uncertainties
Authors: Lerche I. 
Published: October 2003

This paper considers erosion variables and their uncertainties in terms of their influence on outputs of interest in basin analysis calculations. While one often knows with some considerable precision the initial deposition time and final end time of an erosion event, one does not know (as opposed to surmise) when erosion commenced during that time interval, nor does one know the amount of material that was deposited and later removed, nor does one know the lithologic properties of the eroded material. All three of these factors can be of importance in basin development. Using a recently developed extremely fast Excel burial history program, in conjunction with the very fast Monte Carlo program Crystal Ball, one can now rapidly sort out various uncertain factors for their influence on burial history outputs. Two sets of examples illustrate how one can determine which parameters associated with an erosion event dominate in their impact on basin analysis uncertainties. The first example allows the amount of material to be eroded and the time of erosion onset to be variable, while retaining the lithological properties of the eroded material, and investigates which of the two factors has the most dominant influence on oil and gas charge with time. Cumulative probabilities of obtaining oil and gas charges are given as well as relative contributions to variance from the two variables. By changing the underlying distributions from which the erosion amount and the onset timing are chosen, one also changes the cumulative probability of oil and gas charges as well as the relative contributions. This relative sensitivity is also examined. The second illustration sets the erosion amount and onset timing at fixed values but allows uncertainty in lithological properties of the material to be eroded, extreme examples use uncertainty in permeability representative of typical shale and sand lithologies, as well as the power index connecting permeability to porosity. The main concern in this example is to investigate the uncertainty in depth to overpressure isobars immediately after erosion, and to identify which of the lithological parameters is causing the largest effect. This problem is related to the fracture development of a basin with concomitant loss of generated hydrocarbons by such fracturing. The illustrations have been chosen for their simplicity of presentation so that one can see immediately the effects of uncertainties in parameters related to erosion events to the relative importance, relative contributions and relative sensitivity of basin outputs of interest, such as hydrocarbon charge and overpressure development and associated fracturing.
The Effect of Calcium Doping on the Surface and Catalytic Properties of Cobaltic Oxide Catalysts
Authors: Deraz Nasr-Allah M. 
Published: October 2003

The effects of calcium oxide doping (0.75, 1.5 and 3 mol% CaO) and calcination temperature (400, 500, 600 and 700°C) on different surface properties of Co3O4 were investigated. The structural properties of pure and doped oxide samples were determined by XRD methods, the textural properties were investigated via the adsorption of nitrogen at −196°C while the hydrogen peroxide decomposition activity of the investigated solids was determined by oxygen gasometric measurement of the reaction kinetics at 20–40°C. The dissolution of calcium ions in the Co3O4 lattice at temperatures in the range 400–600°C was accompanied by a marked decrease in the mean hydraulic radii (rh) and an increase in the surface area (SBET) and total pore volume (Vp) of the prepared oxide samples. In contrast, doping at 700°C brought about a decrease in the SBET and Vp values of the investigated solids. The catalytic activity for H2O2 decomposition on cobaltic oxide calcined at 400–700°C was found to decrease considerably on doping with CaO. The activation energy for sintering (ΔEs) of the pure and doped solids was determined from the variation in their SBET values as a function of the calcination temperature of these solids. Calcium oxide treatment resulted in a 50% increase in the activation energy of sintering of cobaltic oxide solid calcined at 400–600°C. This increase reflects the role of CaO doping in hindering the sintering of cobaltic oxide.
Primary Prevention of Coronary Heart Disease in the Elderly
Authors: Dornbrook-Lavender Kimberly A , Pieper John A , Roth Mary T 
Published: October 2003

OBJECTIVE: To review relevant literature supporting the use of antihypertensive agents, lipid-lowering agents (i.e., statins), and aspirin therapy for the primary prevention of coronary heart disease (CHD) in an elderly patient population (age ≥65 y). DATA SOURCES: A MEDLINE search (1988–January 2003) was conducted. STUDY SELECTION AND DATA EXTRACTION: Primary and tertiary literature involving the uses of antihypertensives, statins, and aspirin therapy in the elderly were reviewed. DATA SYNTHESIS: Mortality due to CHD in the US population has decreased 40–50% over the last 30 years; however, CHD remains the leading cause of morbidity and mortality in elderly persons. As the population continues to age, the number of older adults eligible for primary prevention will rise. The American Heart Association clinical practice guidelines for the primary prevention of CHD were updated in 2002; however, they are based on findings from clinical trials that enrolled predominantly middle-aged white men. The recommendations for elderly individuals are predominantly extrapolated from subgroup analyses of randomized clinical trials or cohort studies. This literature suggests that elderly persons are candidates for primary prevention measures and experience reductions in coronary events when treated with appropriate therapies. CONCLUSIONS: Data suggest that use of antihypertensives, statins, and aspirin therapy in the elderly appears effective to an extent similar to, and often greater than, that observed in younger patients. We believe these agents should be prescribed to all appropriate high-risk elderly patients. Ongoing and future studies will more clearly elucidate the benefits of primary prevention therapy, particularly in persons ≥75 years of age.