bluuebunny/crossref_metadata_2025_split huggingface dataset:
Enantioselektive Diels‐Alder‐Cycloadditionen via Präorganisation an einem chiralen Lewis‐Säure‐Templat
Authors: Bienaymé Hugues 
Published: July 2007

Der Schlüssel zum Erfolg bei asymmetrischen Diels‐Alder‐Cycloadditionen ist die Präorganisation der Reaktanten durch kovalente und koordinative Bindungen (dative Ti‐O‐Wechselwirkungen). Sogar mit problematischen, einzähnigen, C2v‐symmetrischen Maleinsäureimid‐Dienophilen wurden die gewünschten Cycloaddukte in hohen Ausbeuten mit beachtlicher Enantioselektivität gebildet [Gl (a)]. R1 = H, CH3; R2 = CH3, PhCH2, p‐BrC6H4CH2, (R)‐PhCH2(CH3).magnified image
Stabilisierung von atomarem Stickstoff im Innenraum von C60
Authors: Mauser Harald , Hirsch Andreas , Van Eikema Hommes Nicolaas J. R. , Clark Timothy , Pietzak Björn , Weidinger Alois , Dunsch Lothar 
Published: July 2007

Die konkave innere Oberfläche von C60 ist so inert gegenüber der Bildung kovalenter Bindungen, daß sogar atomarer Stickstoff im Quartett‐Grundzustand als eingeschlossener Gast stabil ist (siehe rechts). Computerchemische und ESR‐Untersuchungen. liefern eine Erklärung für dieses beispiellose Verhalten.magnified image
Nichtnatürliche Anthrachinon‐Kohlenhydrat‐Hybride: Design, Synthese, DNA‐Bindung und Cytotoxizität
Authors: Toshima Kazunobu , Ouchi Hiromi , Okazaki Yoriko , Kano Takaaki , Moriguchi Makoto , Matsumura Shuichi , Asai Akira 
Published: July 2007

Unter Intercalation bindet das Anthrachinon‐Kohlenhydrat‐Hybrid 1 sequenzselektiv an DNA. Entscheidend hierfür und für die so vermittelte Cytotoxizität von 1 ist die Hybridstruktur, wie sie auch in vielen natürlichen Antitumor‐Antibiotica vorkommt. Das Enantiomer von 1 ist wegen des deutlich geringeren Intercalationsvermögens ca. sechsmal weniger cytotoxisch.magnified image
Eine neue Technik zum Aufbau dünner, definierter Multischichtfilme
Authors: Laschewsky André , Mayer Bernd , Wischerhoff Erik , Arys Xavier , Jonas Alain , Kauranen Martti , Persoons André 
Published: July 2007

Abwechselnde Physisorption und chemische Aktivierung kennzeichnen das hier vorgestellte Verfahren zur Synthese dünner, definierter organischer Beschichtungen (schematisch rechts gezeigt). Eine Vielzahl von Verbindungen eignet sich für dieses Verfahren, mit dem selbst nichtzentrosymmetrische Filme zugänglich sind.magnified image
Polykationische Dendrimere
Authors: Stoddart J. Fraser , Ashton Peter R. , Shibata Kazusato , Shipway Andrew N. 
Published: July 2007

45 positiv geladene Zentren weist das durch eine effiziente konvergente Synthese erhaltene Dendrimer auf, dessen Struktur schematisch rechts dargestellt ist. Schlüsselschritt der Reaktionsfolge zum Aufbau der einzelnen Generationen ist die sehr glatt verlaufende Menschutkin‐Reaktion.magnified image
Periodische Struktur eines einzelnen Blattes eines tuchartigen Makromoleküls ‐ Untersuchung des “atomaren Tuchs” mit Rastertunnelmikroskopie
Authors: Takami Tomohide , Ozaki Hiroyuki , Kasuga Mayumi , Tsuchiya Takao , Ogawa Ayumi , Mazaki Yasuhiro , Fukushi Daiji , Uda Masayuki , Aono Masakazu 
Published: July 2007

Allseitig verknüpfte parallelogrammartige Ringe sind das charakteristische Strukturmerkmal des unten gezeigten “atomaren Tuches” 1. Dieses Makromolekül läßt sich durch Photopolymerisation einer Monoschicht von Tetrainmolekülen herstellen, die aus der Gasphase auf Graphit abgeschieden wurde. Mit der strukturellen übereinstimmung zwischen Graphitsubstrat und atomarem Tuch ist es möglich, dessen Elementarmasche zu bestimmen.magnified image
Ein cyclischer Octadecaeisen(III)‐Komplex: ein molekulares Achtzehner‐Rad
Authors: Watton Stephen P. , Fuhrmann Peter , Pence Laura E. , Lippard Stephen J. , Caneschi Andrea , Cornia Andrea , Abbati Gian Luca 
Published: July 2007

Eine D3d‐symmetrische Struktur (siehe Bild rechts) charakterisiert den Komplex 1. Dieses ringförmige Molekül enthält 18 High‐spin‐FeIII‐Zentren, zwischen denen antiferromagnetische Wechselwirkungen auftreten. Bei dem als Doppelsalz der Zusammensetzung 1·6 Et4N(NO3)·15 CH3OH·6 Et2O·24 H2O isolierten Komplex handelt es sich um die bisher größte ringförmige Eisen(III)‐Verbindung. [{Fe(OH)(XDK)Fe2(OCH3)4(O2CCH3)2}6] 1magnified image
PHONA‐PNA‐Cooligomere: Nucleinsäure‐Mimetica mit interessanten Eigenschaften
Authors: Peyman Anusch , Uhlmann Eugen , Wagner Konrad , Augustin Sascha , Weiser Caroline , Will David W. , Breipohl Gerhard 
Published: July 2007

Die Mischung machts: PHONA‐PNA‐Cooligomere wie 1 (T=1‐Thymyl) vereinen die hervorragenden Bindungseigenschaften der PNAs mit den verbesserten physikalischen Eigenschaften der PHONAs, insbesondere deren guter Wasserlöslichkeit.magnified image
Monitoring is the best policy
Authors: Brinker Ervin 
Published: July 2007

AbstractTWO YEARS ago the board of Summit Pointe, a community mental health authority in Battle Creek, Michigan, began implementing Policy Governance. The board completed the drafting of its ends policies in the summer of 1998. But well before the ends policies were completed, the board implemented a comprehensive approach to monitoring its policies and its performance that it is following rigorously. Board Leadership asked the CEO of Summit Pointe to explain this monitoring approach and how it is working. In Carver on the Case (page 4), John Carver comments on it.
Policy governance and school boards? You've got to be kidding!
Authors: Dawson Linda J. , Quinn Randy 
Published: July 2007

AbstractLinda J. Dawson is president of the Aspen Group International, Inc.; Randy Quinn is a founding partner of the Aspen Group. As former executives at the Colorado Association of School Boards, the authors tried numerous times to interest members in Policy Governance. Their story reveals that perseverance can pay off. The authors also share insights on implementing Policy Governance that will be helpful to readers on all kinds of boards. Dawson and Quinn are hosts of an upcoming conference in Hilton Head that will focus on all aspects of using Policy Governance. They can be contacted at aspengrpintl@csn.net or (303) 478‐0125.
Linking with owners: The dos and don'ts
Authors: Moore Jannice 
Published: July 2007

AbstractIn the past two issues of Board Leadership, the feature articles explored first the imperative under Policy Governance of linking with your organization's owners and then how one board went about this work. Now, in the last of our articles on ownership linkage, Jannice Moore, an independent consultant and coach to governing boards, offers some practical tips for ensuring that the ways you reach out to owners will yield the kind of in‐depth information necessary to shape effective ends policies.
Two people in the CEO role: Can it work?
Authors: Raso Catherine 
Published: July 2007

AbstractAt times, the CEO job may look so challenging and appear to require such a wide breadth of knowledge and experience that boards are moved to ask, “Can one person really do it all?” This is when many boards consider actually putting two people in this position rather than one. Although it is possible using Policy Governance to delegate the CEO role to two individuals, it requires an enormous amount of discipline to avoid the problems that inevitably come with such a decision. Policy Governance consultant Catherine Raso recently worked with a board that was struggling with this decision and has done a lot of thinking about the pros and cons of the dual CEO. We asked her to share what she has learned with Board Leadership.
Creating your policy governance tool kit
Authors: Oliver Caroline 
Published: July 2007

AbstractThe Board that is working hard to use Policy Governance faces a special challenge when searching for tools to help it do its work. It needs to make sure that the tools it chooses and the tools it develops on its own are truly a help and not a hindrance in getting the full benefits of Policy Governance. Caroline Oliver, a governance consultant based in Canada and editor of The Policy Governance Fieldbook Practical Lessons, Tips, and Tools from the Experiences of Real‐World Boards (San Francisco: Jossey‐Bass, 1999), sheds some light on what kind of tools are helpful and how to choose wisely.
Sustaining policy governance
Authors: Conduff Michael A. 
Published: July 2007

AbstractMost boards work very hard to implement Policy Governance, but what happens years later when most or all of the members involved in that work have been replaced? Because Policy Governance is as much about how board members approach their jobs as it is about policy, ensuring that Policy Governance lives on is a major challenge. We asked Mike Conduff, board consultant and CEO of an organization whose board has been struggling with the question of how to ensure the sustainability of Policy Governance, to consider what it takes to meet this challenge. Mike can be contacted at mconduff@myriad.net.
Board access to the internal auditor
Authors: Carver John 
Published: July 2007

AbstractMore and more organizations are beginning to create a position for an ethics officer or internal auditor. Such a position can be a great asset to an organization, but it is fraught with ambiguity. To whom does this auditor report? Is it a staff position under CEO authority? Or is it a staff position intended to report to the board? If the latter, how can the integrity of the CEO's position be maintained? In this brief article, John Carver clarifies how such a position can function effectively in a Policy Governance board.
Three‐Component Entanglements Consisting of Three Crescent‐Shaped Bidentate Ligands Coordinated to an Octahedral Metal Centre
Authors: Durola Fabien , Russo Luca , Sauvage Jean‐Pierre , Rissanen Kari , Wenger Oliver S. 
Published: July 2007

Abstract3,3′‐Biisoquinoline ligands (biiq) L, bearing aromatic substituents on their 8 and 8′ positions, have been used to generate interwoven systems consisting of three crescent‐shaped ligands disposed around an octahedral metal centre. Mono‐ligand complexes of the type [ReL(CO)3py]+ (py: pyridine) have also been prepared, leading to sterically non‐hindering complexes in spite of the endotopic nature of the chelate used. The three‐component entanglements have been prepared by using either FeII or RuII as gathering metal centre. The synthetic procedure is simple and efficient, affording fully characterised complexes as their PF6 or SbCl6 salts. X‐ray crystallography clearly shows that the crescent‐shaped ligands do not repel each other in the tris‐chelate complexes. In an analogous way, the ReI complexes show open structures with no steric repulsion between the L ligand and the ancillary CO or py groups. The FeL3 or RuL3 compounds are very unusual in the sense that, contrary to all the other tris‐bidentate chelate complexes made till now, the three organic components are tangled up, in a situation which will be very favourable to the formation of new non trivial topologies of the catenane type.
Fortifying competitive intelligence systems with shadow teams
Authors: Rothberg Helen N. 
Published: July 2007

AbstractShadow teams, specialized entities within a competitive intelligence system, are charged with “shadowing” and learning everything possible about a specific competitor. A team that can think, reason, and react like the competitor can quickly provide management with actionable intelligence about the rival's behavior as needs develop. As with the overall CI function, shadow teams need to operate outside the structural confines of the organization and should report unfiltered analysis directly to strategic players. Careful initiation and monitoring of early team development, and ample technical training, are vital, as are clear, measurable goals. Teams should be kept small, or consist of “champions” with access to a ring of experts within the firm. Team members should be diverse, with a variety of dispositions, and preferably not so tenured with the firm that they've forgotten how to think “outside the box.” Case examples are provided showing why shadow teams work—and why they fail. © 1997 John Wiley & Sons, Inc.
Competitive intelligence in business process engineering: II Study at digital equipment corporation
Authors: Hennedy Larry 
Published: July 2007

AbstractBusinesses undergoing reengineering efforts must rely on analytical data and management insight to design and implement processes that most effectively address market needs. These design efforts require endorsement and support by the most senior management and require a fundamentally different approach to market success than past business models and information would dictate. Therefore, competitive and externally‐generated analysis is key to understanding the opportunities, risks, and potential investment profiles that will move a changing organization toward competitive advantage in dynamic markets. This article references a reengineering design process successfully implemented within Digital Equipment Corporation's Computer Systems Division in 1994–1995. In moving from a functional to a product‐oriented business model, Digital employed competitive intelligence (CI) to analyze and evaluate new organizational designs and business process systems by defined market segments and competitors, and by projecting accepted economic principles. CI research efforts included information on competitive positions, potential shifts in product line positioning, tradeoff scenarios from one system type to another, pro forma investment, and market share analyses. © 1997 John Wiley & Sons, Inc.
Using competitive intelligence to develop a strategic management action‐oriented measurement system
Authors: Sullivan Mark 
Published: July 2007

AbstractCompetitive Intelligence can play an important role in developing an action‐oriented measurement system that, by focusing on “process” measurement rather than traditional “results” measurement, allows management to monitor and improve performance in real time. The goal: an overall management measurement system integrated into operating and tactical measurement systems, producing a seamless connection between what operators measure on the plant floor and what senior managers track at the management level to ensure that strategies are being properly evolved. This network of measures is derived tkom an integrated and aligned set of measures popularly known as “balanced scorecards,” and from a Total Quality Management paradigm that focuses on identifying customer‐defined “quality.” Competitive intelligence can establish what those quality measures should be, as well as ensure that the firm keeps up with the shifting of quality. © 1997John Wlky & Sons, Inc. © 1997 John Wiley & Sons, Inc.
Theoretical Study of Remote Substituent Effects on X–H(X=CH2, NH, O) Bond Dissociation Energies of Azulene
Authors: Yu Yi‐Yun , Fu Yao , Liu Lei , Guo Qing‐Xiang 
Published: July 2007

AbstractIn the study, the X–H (XCH2, NH, O) bond dissociation energies (BDE) of para‐substituted azulene (Y‐C10H8X‐H) were predicted theoretically for the first time using Density Functronal Theory (DFT) methods at UB3LYP/6‐311++g(2df,2p)// UB3LYP/6‐31+g(d) level. It was found that the substituents exerted similar effects on the X–H BDE of azulene as those on benzene, except for 6‐substituted 2‐methylazulene. Owing to the substituent‐dipole interaction, the reaction constants (ρ+) of 2‐ and 6‐Y‐C10H8X‐H (XNH and O only) varied violently. The origin of the substituent effects on the X–H BDE of azulene was found, by both GE/RE and SIE theory, to be directly associated with variation of the radical effects, although the ground effects also played a modest role in determining the net substituent effects.
Effects of some Nitrogen Bases on the Oxygenation of Tetralin with Sodium Periodate Catalyzed by Manganese(III) meso‐Tetraphenylporphyrin as a Model Compound of Cytochrome P‐450
Authors: Reza Tayebee 
Published: July 2007

AbstractThe effect of some nitrogen bases on the oxygenation of tetralin by sodium periodate, catalyzed by Mn(TPP)OAc, was evaluated. A series of eight bases, including imidazole, pyridine, and quinuclidine, was used. Binding of axial ligand to the four‐coordinate Mn(III)‐center influenced the efficiency and selectivity of the catalytic oxygenation system.
Polystyrene‐supported Phenol/DMAP: an Efficient Binary Catalyst System for CO2 Fixation to Give Cyclic Carbonates
Authors: Qi Chao‐Rong , Jiang Huan‐Feng , Wang Zhao‐Yang , Zou Bo 
Published: July 2007

AbstractPolystyrene‐supported phenol (PS‐PhOH) was successfully synthesized by alkylation reaction of phenol with 2% DVB cross‐linked chloromethylated polystyrene and characterized by IR spectra and elemental analysis. In conjunction with an organic base such as DMAP, DBU, triethylamine (Et3N), diethylamine (Et2NH) or pyridine, the PS‐PhOH could effectively catalyze the coupling reaction of carbon dioxide with epoxides to give cyclic carbonates in high yield and selectivity under mild conditions. The binary catalyst system of the PS‐PhOH/DMAP was found to be the most active. The influence of reaction temperature, carbon dioxide pressure and reaction time on the yield of product was carefully investigated. The PS‐PhOH could be recycled by simple filtration for at least up to ten times without loss of catalytic activity.
Rapid Thermolysis Studies of [Pb2(TNR)2(CHZ)2(H2O)2]·4H2O and Cd(CHZ)2(TNR)(H2O)
Authors: Zuo Xiao‐Li , Qiao Xiao‐Jing , Sun Yuan‐Hua , Zhang Tong‐Lai , Zhang Jian‐Guo , Yang Li , Wang Shao‐Zong 
Published: July 2007

AbstractT‐jump/FT‐IR spectroscopy was used to study the rapid thermal decomposition activity of [Pb2(TNR)2(CHZ)2(H2O)2]·4H2O and Cd(CHZ)2(TNR)(H2O) under 0.1 MPa Ar atmosphere. The results show that the main gaseous products of [Pb2(TNR)2(CHZ)2(H2O)2]·4H2O are NH3, H2O and HONO, while CO and NO are the major gaseous products of flash pyrolysis of Cd(CHZ)2(TNR)(H2O). Thus Cd(CHZ)2(TNR)(H2O) is not an eco‐friendly and chemically compatible primary explosive. Both compounds liberate volatile metal carbonate, oxide and isocyanate compounds. The combustion temperature and products of the two compounds were calculated by Real code. The results of theoretical calculation show that the combustion temperature of [Pb2(TNR)2(CHZ)2(H2O)2]·4H2O is higher than that of Cd(CHZ)2(TNR)(H2O), there is no HNCO in the combustion products and the amount of NO is less than the experiment result from T‐jump/FTIR.
Study on the Interaction between Lanthanide Cationic Porphyrin Complex and Bovine Serum Albumin
Authors: Liu Peng , Liu Yi , Li Xi , Huang Wei‐Guo 
Published: July 2007

AbstractThe interaction between lanthanide cationic porphyrin and bovine serum albumin (BSA) was studied by fluorescence and UV‐Vis spectrum. The static quenching of BSA was observed in the presence of YbTMPyP. According to the thermodynamic parameters, this binding was regarded as "enthalpy‐driven" reaction. Furthermore, YbTMPyP is so close to the residues of BSA that molecular resonance energy transfer occurs between them. Besides, the red drift and hypochromicity of absorption spectrum of YbTMPyP were accompanied with the binding reaction.
Thermogravimetric Studies of Deposited Potash Impregnated for Flame‐Retardancy into a Cotton Fabric
Authors: Mostashari S. M. , Nia Y. K. , Baie S. 
Published: July 2007

AbstractThe effect of potash as a nondurable finish on the flammability of 100% cotton fabric (plain 180 g/m2) was investigated. The bone‐dried weighed fabrics were dipped into suitable concentrations of potash, with a volume of 100 mL at 20–2 °C. The impregnation was followed by means of squeeze rolls and drying at 110 °C. The samples were then reweighed with analytical precision. After conditioning overnight by using our "vertical flame tester" the optimum add‐on values to impart flame‐retardancy to cotton fabric was determined and expressed by 0.80 g of potash per 100 g fabric to be an efficient addition. Thermogravimetric analysis of pure cotton, treated cotton with potash at its optimum efficiency for donation of flame‐retardancy into cotton fabric was fulfilled and the thermograms were compared and commented. The effectiveness of this hydroxide was attributed to the heat dissipation by the remaining consumed material during the combustion. The results obtained are in favor of "Dust or Wall Effect Theory".
Amperometric Sensor Based on Neutral Red‐Doped Silica Nanoparticles Coupled with Microdialysis for the Measurement of Glutamate in the Rat Striatum
Authors: Li Xiao‐Hua , Xian Yue‐Zhong , Xie Zong‐Hong , Min Hong , Li Chen‐Xin , Jin Li‐Tong 
Published: July 2007

AbstractAmperometric sensor based on neutral red‐doped silica (NRSiO2) nanoparticles (NPs) was fabricated and coupled with a microdialysis sampling system for the detection of glutamate (Glu) in the rat striatum. The NRSiO2 NPs [about (45±3) nm] were prepared with water‐in‐oil (W/O) microemulsion method, and characterized by transmission electron microscope (TEM) technique. The neutral red (NR) doped in silica network could maintain its high electroactivity and behave as an excellent electron mediator for electrocatalysis of hydrogen dioxide. Furthermore, the silica surface could prevent the leakage of NR, hence, the stability of biosensor was improved. The novel Glu biosensor showed a linear range from 5.0×10−7 to 1.5×10−4 mol/L, with a detection limit of 2.0×10−7 mol/L(S/N3).
Does 18fluoro‐fluorodeoxyglucose positron emission tomography improve recurrence detection in patients treated for head and neck squamous cell carcinoma with negative clinical follow‐up?
Authors: Salaun Pierre Y. , Abgral Ronan , Querellou Solène , Couturier Olivier , Valette Gérald , Bizais Yves , Kraeber‐Bodéré Françoise 
Published: July 2007

AbstractBackground.The aim of this study was to determine the benefits of 18fluoro‐fluorodeoxyglucose positron emission tomography (18F‐FDG PET) in the detection of head and neck squamous cell carcinoma (HNSCC) recurrence in patients with negative clinical follow‐up.Methods.Whole‐body 18FDG‐PET was performed in 30 patients treated for HNSCC without any clinical element for recurrence.Results.Twenty‐one negative PET and 9 positive results were seen. One patient with abnormal 18F‐FDG uptake in the laryngeal area did not have recurrent HNSCC (false positive). Eight had proven recurrence. The sensitivity and specificity of 18F‐FDG PET for the diagnosis of HNSCC recurrence were 100% (8/8) and 95% (21/22), respectively. The positive predictive value was 89% (8/9). The negative predictive value was 100% (21/21). The overall accuracy was 97% (29/30).Conclusion.The results of our study confirm the high effectiveness of 18F‐FDG PET in assessment of HNSCC recurrence and suggest that it is more accurate than conventional physical examination follow‐up alone. © 2007 Wiley Periodicals, Inc. Head Neck 2007