bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Alk‐2‐ynoic Acids
Authors: Evano G. 
Published: October 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Carboxylic Acids: Synthesis from Alkenes (Excluding Reactions with Carboxylic Acid Derivatives)
Authors: Evano G. 
Published: October 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Rolling Circle Amplification: Applications in Nanotechnology and Biodetection with Functional Nucleic Acids
Authors: Zhao Weian , Ali M. Monsur , Brook Michael A. , Li Yingfu 
Published: October 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Oxidatively Generated Damage to the Guanine Moiety of DNA: Mechanistic Aspects and Formation in Cells
Authors: Cadet Jean , Douki Thierry , Ravanat Jean‐Luc 
Published: October 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Chemical Selectivity Through Control of Excited‐State Dynamics
Authors: Olivucci Massimo , Santoro Fabrizio 
Published: October 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Gold‐Catalyzed Cycloisomerizations of Enynes: A Mechanistic Perspective
Authors: Jimenez‐Nunez Eloisa , Echavarren Antonio M. 
Published: October 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Bio‐Inspired Synthetic Pathways and Beyond: Integrative Chemistry
Authors: Prouzet Eric , Ravaine Serge , Sanchez Clement , Backov Renal 
Published: October 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Mechanistic Insights into Phosphoprotein‐Binding FHA Domains
Authors: Liang Xiangyang , Van Doren Steven R. 
Published: October 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Contrasting Disease and Nondisease Protein Aggregation by Molecular Simulation
Authors: Fawzi Nicolas Lux , Yap Eng‐Hui , Okabe Yuka , Kohlstedt Kevin L. , Brown Scott P. , Head‐Gordon Teresa 
Published: October 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Multiple‐Replica Exchange with Information Retrieval
Authors: Athènes Manuel , Calvo Florent 
Published: October 2008

AbstractThe parallel tempering simulation method was recently extended to allow for possible exchanges between non‐adjacent replicas. We introduce a multiple‐exchange variant which naturally incorporates the information from all replicas when calculating statistical averages, building on the related virtual‐move method of Coluzza and Frenkel (ChemPhysChem 2005, 6, 1779). The method is extensively tested on three model systems, namely, a Lennard‐Jones cluster exhibiting a finite size phase transition, the Lennard‐Jones fluid, and the 2D ferromagnetic Ising model. In all cases, the present method performs significantly better and converges faster than conventional parallel tempering Monte Carlo simulations. The standard deviations are also systematically decreased with respect to virtual moves.
Educational effect of online lecture using streaming technology
Authors: Akiyama Hidenori , Teramoto Akemi , Kozono Kazutake 
Published: October 2008

AbstractA conventional lecture on laser engineering had been done in a lecture room till 1999. Content using on‐demand streaming method was made for an online lecture of laser engineering in 2000. The figures and equations used in the conventional lecture and the voice recorded for the online lecture were converted to Real Media. Then an online lecture was provided to students by using a Helix Universal Server. The trial of the online lecture was done only for the students who wanted to take the online lecture course in 2000. The online lectures have been recognized as credits for graduation by the change of a law since 2001. About 100 students have registered for the online lecture of laser engineering every year since 2001. Here, three years' questionnaire surveys of the online lecture are summarized, and results of examinations on the conventional lecture for two years and on the online lecture for three years are compared. It is recognized for the lecture on laser engineering that the educational effect of the online lecture is comparable to or better than that of the conventional lecture. © 2008 Wiley Periodicals, Inc. Electron Comm Jpn, 91(3): 37– 44, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecj.10072
Synthesis, Structural, Magnetic and Thermal Characterization of {[Cu(bipy)]2(μ‐HP2O7)(μ‐Cl)}·H2O
Authors: Ikotun Oluwatayo F. , Higbee Elizabeth M. , Ouellette Wayne , Lloret Francesc , Julve Miguel , Doyle Robert P. 
Published: October 2008

AbstractCopper(II) hydroxide reacts with 2,2′‐bipyridine (bipy) and sodium pyrophosphate in a 2:2:1 stoichiometric ratio under ambient conditions at pH 1.6 in water. The resulting neutral dinuclear CuII complex features a bridging set containing bridging monoprotonated pyrophosphate and a monoatomic chloro bridge (making this the first pyrophosphate bridged coordination complex containing an alternate, additional halide bridge between the metal centers). Single‐crystal X‐ray diffraction studies revealed the complex to be {[Cu(bipy)]2(μ‐HP2O7)(μ‐Cl)}·H2O. The structure consists of a dimeric copper(II) system with each metal ion in a square pyramidal geometry. The asymmetric [Cu(bipy)]2+ units are bridged by bis‐bidentate pyrophosphate and an axially bridging chlorine atom. The incorporation of an additional bridge (halide) and the presence of protonated pyrophosphate (HP2O73–) in the structure are both rare for this family of structures. Intermolecular π–π interactions between the bipy ligands from adjacent dinuclear complexes and hydrogen bonding between the lattice water molecule and the bridging chloro atom create a 1D network. Variable‐temperature magnetic susceptibility measurements show the occurrence of a weak antiferromagnetic interaction with a maximum at 3.0 K. The analysis of the magnetic data in the whole temperature range (1.9–300 K) allows the determination of the value of the intramolecular magnetic coupling (J = –3.19 cm–1, the Hamiltonian being defined as Ĥ = –JŜA. ŜB). This value of J is significantly lower than that observed for the analogous dicopper(II) system devoid of the bridging chloro group. Reasons for this difference and its importance are discussed.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
RTSVC: Real‐time system for visual control of robots
Authors: Bugarin Eusebio , Kelly Rafael 
Published: October 2008

AbstractThis article presents an image processing system that can work in hard real‐time. Compared with systems that use the traditional multiprocessor architecture approach, this computer system takes advantage on recent technological advances and it is designed to work with a single processor PC under RTLinux. Its programming environment is similar to C programming language and it offers a friendly graphical user interface. The performance of the system is illustrated by means of experiments applied to visual guidance of mobile robots via velocity fields using a fixed high‐speed camera. The experiments were carried out with a strict sampling frequency of 100 Hz. © 2008 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 18, 251–256, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).
Ellagic acid: Characterization as substrate of polyphenol oxidase
Authors: Muñoz‐Muñoz Jose Luis , Garcia‐Molina Francisco , Garcia‐Molina Maria , Tudela Jose , García‐Cánovas Francisco , Rodriguez‐Lopez Jose Neptuno 
Published: October 2008

AbstractEllagic acid has been described as an inhibitor of tyrosinase or polyphenol oxidase and, therefore, of melanogenesis. In this work, we demonstrate that ellagic acid is not an inhibitor, but a substrate of mushroom polyphenol oxidase, an enzyme which oxidizes ellagic acid, generating its o‐quinone. Because o‐quinones are very unstable, we used an oxymetric method to characterize the kinetics of this substrate, based on measurements of the oxygen consumed in the tyrosinase reaction. The catalytic constant is very low at both pH values used in this work (4.5 and 7.0), which means that the Michaelis constant for the oxygen is low. The affinity of the enzyme for the substrate is high (low K), showing the double possibility of binding the substrate. Moreover, a new enzymatic method is applied for determining the antioxidant activity. Ellagic acid shows high antioxidant activity (EC50 = 0.05; number of electrons consumed by molecule of antioxidant = 10), probably because of the greater number of hydroxyl groups in its structure capable of sequestering and neutralizing free radicals. © 2008 IUBMB IUBMB Life, 61(2): 171–177, 2009
Structural changes in squid (Loligo japonica) collagen after modification by formaldehyde
Authors: Fu Xueyan , Xue Changhu , Jiang Lina , Miao Benchun , Li Zhaojie , Xue Yong 
Published: October 2008

AbstractBACKGROUND: Formaldehyde (FA) has been suggested to cause changes in texture and functional properties in some marine species. It was therefore hypothesised that FA may affect collagen, a fundamental constituent of the extracellular matrix in squid.RESULTS: Two types of collagen, I and V, were isolated by pepsin digestion and differential salt precipitation. Type V collagen contained higher proportions of isoleucine, leucine, and lysine and lower proportions of alanine and hydroxyproline. The effects of FA on pepsin‐solubilised squid collagen were examined by differential scanning calorimetry and Raman spectroscopy. The squid collagen showed a transition temperature (Tm1) of 37.2 ± 0.2 °C, which was significantly reduced in the presence of 2 and 10 mmol L−1 FA. In the presence of 1, 2 and 10 mmol L−1 FA an additional peak (Tm2) was also observed at 77.7 ± 0.1, 78.4 ± 0.1 and 62.7 ± 0.2 °C respectively, suggesting FA–collagen interactions. Treatment with 2 mmol L−1 FA increased the I940/I1005 ratio from 1.09 to 1.66 and shifted the 990 and 1245 cm−1 bands. The tyrosine doublet ratio (I850/I830) was also increased about threefold, suggesting that α helix, β sheet type and random coil structures were changed by FA.CONCLUSION: The secondary structure of squid collagen can be affected by FA through hydrophobic interactions. Copyright © 2008 Society of Chemical Industry
Sub‐2 μm HPLC coupled with sub‐ppm mass accuracy for analysis of pharmaceutical compound libraries
Authors: Stroh Justin G. , Petucci Christopher J. , Brecker Scott J. , Nogle Lisa M. 
Published: October 2008

AbstractRecent advances in accurate mass analysis are poised to allow the high‐throughput production of accurate mass data on many more compounds than was previously available. It is shown that sub‐ppm mass accuracy (producing elemental compositions) can be obtained on a simple TOF mass spectrometer operating in the manufacturer's standard mode. Concomitantly, there have been important technological advances in LC with respect to speed of analysis using sub‐2 μm particle columns. Much of the sub‐2 μm work in the literature has been under the label ultra performance LC (UPLC), however, we show that very high‐speed results can be obtained using other manufacturer's pumps by using elevated column temperatures. Using elevated temperatures, HPLC peak widths on the order of 1 s can be obtained. We report the coupling of these two technologies (sub‐ppm mass accuracy MS with high‐speed HPLC) for the rapid analysis of compounds entering pharmaceutical libraries.
Results of in utero atrial septoplasty in fetuses with hypoplastic left heart syndrome
Authors: Marshall Audrey C. , Levine Jami , Morash Donna , Silva Virginia , Lock James E. , Benson Carol B. , Wilkins‐Haug Louise E. , McElhinney Doff B. , Tworetzky Wayne 
Published: October 2008

AbstractObjectivesNeonates with hypoplastic left heart syndrome and intact or highly restrictive atrial septum have a high rate of mortality. We sought to assess the effect of prenatal intervention intended to create atrial septal defects in fetuses with this diagnosis.MethodsWe reviewed the medical records and imaging of all fetuses undergoing intervention for atrial septal defect creation in the setting of hypoplastic left heart syndrome and intact atrial septum. The procedures were performed with a percutaneous cardiac puncture under the guidance of ultrasonography. For the 21 interventions, patient and procedural characteristics were analyzed to identify predictors of neonatal outcome.ResultsOf 21 procedures attempted between 24 and 34 weeks' gestation, 19 were technically successful. Fetal demise occurred in two cases. The size of the created defect varied and measured at least 3 mm in six fetuses. Among 19 neonates, a larger atrial septal defect was associated with higher oxygen saturation and less need for intervention prior to surgical single‐ventricle palliation.ConclusionsTechnically successful atrial septal defect creation in fetuses with hypoplastic left heart syndrome and intact atrial septum results in atrial septal defects of varying size; defects of at least 3 mm in diameter appear to confer postnatal benefit. Copyright © 2008 John Wiley & Sons, Ltd.
Low levels of maternal serum PAPP‐A in early pregnancy and the risk of adverse outcomes
Authors: Spencer C. A. , Allen V. M. , Flowerdew G. , Dooley K. , Dodds L. 
Published: October 2008

AbstractObjectivesTo determine if low maternal serum level of pregnancy associated plasma protein A (PAPP‐A) measured in early pregnancy can predict adverse pregnancy outcomes and to examine the gestational age (GA) sampling interval for these outcomes.MethodsThis was a nested case‐control study from a prospective cohort of women recruited at < 20 weeks of gestation in Halifax, NS. Cases (n = 248) were defined as women who had a fetal loss or developed preeclampsia, severe pregnancy‐induced hypertension (PIH), or small for gestational age infant (SGA). Controls (n = 244) were frequency matched to cases by GA at the time of serum sampling (6 to < 20 weeks GA). Participant information was obtained from questionnaires and medical chart reviews.ResultsWomen with a low PAPP‐A measure [⩽0.4 multiples of the median (MoM)] had an adjusted odds ratio of 2.1 [95% confidence interval (CI) 1.3–3.6] compared to others (>0.4 MoM). However, performance as a screening test was poor [sensitivity = 38.7%; specificity = 81.6%; positive likelihood ratio (LR) = 2.1; negative LR = 0.75]. In the adjusted model, the10‐ to 14‐week GA period was the only time period where low PAPP‐A was significantly associated with adverse outcomes.ConclusionsWomen with a low PAPP‐A early in their pregnancy have twice the risk of an adverse outcome, though PAPP‐A as a one‐time single marker test has limited value. Copyright © 2008 John Wiley & Sons, Ltd.
Synthesis and photophysical properties of a novel green fluorescent polymer for Fe3+ sensing
Authors: Hu Yulin , Wang Baoyan , Su Zhixing 
Published: October 2008

AbstractBACKGROUND: In recent years, environmental pollution has become a major concern for industrial societies. The design of highly selective and sensitive sensor materials has become a very important scientific goal.RESULTS: A novel 4‐amino‐substituted 1,8‐naphthalimide dye with intense green fluorescence was synthesized. The dye was then copolymerized with methyl methacrylate. The presence of metal cations (Ca2+, Mg2+, Cr3+, Mn2+, Fe3+, Fe2+, Co2+, Ni2+, Cu2+ and Zn2+) could quench the fluorescence intensity of a tetrahydrofuran solution of the dye and the copolymer at different levels. The effect of Fe3+ was much stronger than that of the other cations. There was a good linear correlation between F0/F (F0 and F are the fluorescence intensities in the absence and presence of the metal ions, respectively) and the Fe3+ concentration in the range 1.33 × 10−7–4.00 × 10−4 mol L−1. The polymeric sensor in a film state exhibited a dynamic response to Fe3+ in the concentration range from 3.44 × 10−6 to 3.04 × 10−3 mol L−1 and the average response time was about 20 s.CONCLUSION: In view of the selectivity and rapid responsivity of the polymer sensor studied, it could be used as a new polymeric sensor for water pollution by Fe3+ cations. Copyright © 2008 Society of Chemical Industry
Size‐dependent photoluminescence blinking statistics of single CdSe/ZnS nanocrystals
Authors: Ito Yuichi , Matsuda Kazunari , Kanemitsu Yoshihiko 
Published: October 2008

AbstractWe studied the photoluminescence (PL) blinking statistics of single CdSe/ZnS nanocrystals at room temperature. It was found that the on ‐ and off ‐time statistics of PL blinking obey power‐law distributions for various nanocrystal sizes. The electron tunneling model between a nanocrystal and the matrix explains the size‐dependent power‐law exponents that characterize the PL blinking statistics, qualitatively. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Ultrafast insulator‐metal transition in VO2: interplay between coherent lattice motion and electronic correlations
Authors: Leitenstorfer A. , Kübler C. , Lopez R. , Halabica A. , Haglund R. F. , Huber R. 
Published: October 2008

AbstractThe multi‐THz conductivity of VO2 recorded during a photoinduced insulator‐metal transition directly reveals the femtosecond dynamics of V‐V stretching modes and electronic correlations. The strongly correlated character of the electronic system leads to a transient behaviour of the conductivity that cannot be understood in a Born‐Oppenheimer picture. Based on our measurements with a time resolution of 12 fs and recent theoretical simulations for the electronic structure in steady state, we suggest a novel qualitative model for the non‐thermal phase transition. The extremely high speed for the photoinduced phase transition is elegantly explained via a directed wave packet motion in the electronically excited state of the dimer that transfers the crystal structure of the insulator into the configuration of the metallic phase. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Demonstration of confocal sum frequency microscopy
Authors: Locharoenrat Kitsakorn , Sano Haruyuki , Mizutani Goro 
Published: October 2008

AbstractWe have obtained the first confocal microscopic sum frequency (SF) intensity images, using ZnS polycrystals as a sample. We have found different contrasts in the SF intensity images when the incident beams were focused at different depths in the ZnS sample. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Encoding Absolute Configurations with Chiral Enantiophore Descriptors. Application to the Order of Elution of Enantiomers in Liquid Chromatography
Authors: Del Rio Alberto , Gasteiger Johann 
Published: October 2008

AbstractNew chiral descriptors based on pharmacophore perception around the chiral center are used for the prediction of the orders of elution in chiral chromatography and are associated to the absolute configurations. This approach, in which the descriptors are based on the analysis of the strategic atoms around the stereogenic center, allows to describe the chirality of pharmacophore points in the ligand that are supposed to be important for the enantioselective recognition mechanism. ChirBase, a database for chiral chromatography, was used to extract 51 pairs of enantiomers separated on the commercially available Whelk‐O1 chiral stationary phase. Modeling of the data with various techniques such as decision trees and artificial neural network were performed and high values of correct predictions were obtained with all modeling techniques, namely with more than 95% for training sets, about 85% for cross‐validations, and about 80% for the external test set. The descriptors were used to collect precise and straightforward information about the mechanism of diastereomeric complexations as well as to elucidate the molecular requirements for obtaining a given elution order in a chiral separation. Since the descriptors completely denote the chirality of the enantiomers, the prediction of a new compound allows to unambiguously assign the absolute configurations to a given order of elution. This application opens new perspectives not only in the field of chiral High Performance Liquid Chromatography (HPLC) separations but also to boost the chemoinformatic research toward effective and relevant chiral descriptors derived from the pharmacophore perception that are likely to be important in many areas of chemistry and drug design.