bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cucurbitacin B 2‐Sulfate and Cucurbitacin Glucosides from the Root Bark of Helicteres angustifolia.
Authors: Chen Zong‐Tsi , Lee Shwu‐Woan , Chen Chiu‐Ming 
Published: April 2007

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, please click on HTML or PDF.
RhI‐Catalyzed Bimolecular Cyclization Between Two Different 1,5‐Bisallenes: A Combinatorial One‐Step Approach to Heterosteroids and Mechanistic Implications.
Authors: Ma Shengming , Lu Lianghua 
Published: April 2007

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, please click on HTML or PDF.
Glyscavins A (Ia), B (Ib) and C (Ic), New Phenolic Glycoside Antioxidants Produced by a Fungus Mycelia sterilia F020054.
Authors: Moon Byung‐Sik , Ryoo In‐Ja , Yun Bong‐Sik , Bae Kyung‐Sook , Lee Kap Duk , Yoo Ick‐Dong , Kim Jong‐Pyung 
Published: April 2007

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, please click on HTML or PDF.
First Total Synthesis of (.+‐.)‐Verrucosapyrone A.
Authors: Komiyama Takuzo , Takaguchi Yutaka , Tsuboi Sadao 
Published: April 2007

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, please click on HTML or PDF.
Thioglucosides from the Seeds of Raphanus sativus L.
Authors: Duan Li‐Xin , Feng Bao‐Min , Wang Wei , Chen Fang , Cai Guang‐Ming , Pei Yue‐Hu , Wang Yong‐Qi 
Published: April 2007

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, please click on HTML or PDF.
Studies Toward the Total Synthesis of Irumamycin: Stereoselective Preparation of the C(15)—C(27) Segment via Two‐Directional Chain Synthesis.
Authors: Hirose Tomoyasu , Sunazuka Toshiaki , Yamamoto Daisuke , Mouri Mutsumi , Hagiwara Yoshiaki , Matsumaru Takanori , Kaji Eisuke , Imura Satoshi 
Published: April 2007

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, please click on HTML or PDF.
Synthesis of (‐)‐(5R,6S)‐6‐Acetoxyhexadecanolide, a Mosquito Oviposition Attractant Pheromone of Culex pipiens fatigans.
Authors: Sabitha Gowravaram , Swapna R. , Reddy E. Venkata , Yadav J. S. 
Published: April 2007

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, please click on HTML or PDF.
Design, Synthesis and Biological Evaluation of a Macrocyclic Discodermolide/Dictyostatin Hybrid.
Authors: Paterson Ian , Gardner Nicola M. 
Published: April 2007

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, please click on HTML or PDF.
Bioactive Microbial Metabolites. Part 30. Absolute Configuration and Antitumor Activity of Myxochelin A Produced by Nonomuraea pusilla TP‐A0861.
Authors: Miyanaga Satoshi , Obata Takamasa , Onaka Hiroyasu , Fujita Tsuyoshi , Saito Noriko , Sakurai Hiroaki , Saiki Ikuo , Furumai Tamotsu , Igarashi Yasuhiro 
Published: April 2007

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, please click on HTML or PDF.
La(OH)3 and La2O3 Nanobelts — Synthesis and Physical Properties.
Authors: Hu Chenguo , Liu Hong , Dong Wenting , Zhang Yiyi , Bao Gang , Lao Changshi , Wang Zhong L. 
Published: April 2007

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, please click on HTML or PDF.
Antihelminthic Activity of Some Newly Synthesized 5(6)‐(Un)substituted‐1H‐benzimidazol‐2‐ylthioacetylpiperazine Derivatives.
Authors: Mavrova Anelia Ts. , Anichina Kamelya K. , Vuchev Dimitar I. , Tsenov Jordan A. , Denkova Pavletta S. , Kondeva Magdalena S. , Micheva Mitka K. 
Published: April 2007

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, please click on HTML or PDF.
Differential Calorimetric Analysis of the Binary System Sb—Zn
Authors: Adjadj Fouzia , Belbacha El‐djemai , Bouharkat Malek 
Published: April 2007

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, please click on HTML or PDF.
Fischer Carbene Complexes: Beautiful Playgrounds to Study Single Electron Transfer (SET) Reactions
Authors: Sierra Miguel A. , Gomez‐Gallego Mar , Martinez‐Alvarez Roberto 
Published: April 2007

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, please click on HTML or PDF.
The Copper‐Catalyzed Asymmetric Allylic Substitution
Authors: Alexakis Alexandre , Malan Christophe , Lea Louise , Tissot‐Croset Karine , Polet Damien , Falciola Caroline 
Published: April 2007

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, please click on HTML or PDF.
Asymmetric Synthesis of Monofluorinated Compounds Having the Fluorine Atom Vicinal to π‐Systems
Authors: Prakesch Michael , Gree Danielle , Gree Rene 
Published: April 2007

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, please click on HTML or PDF.
New Synthetic Methods Utilizing Conjugate Addition of Nucleophiles to 1‐Chlorovinyl p‐Tolyl Sulfoxide
Authors: Satoh Tsuyoshi , Sugiyama Shimpei 
Published: April 2007

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, please click on HTML or PDF.
Structural‐Based Engineering for Transferases to Improve the Industrial Production of 5′‐Nucleotides
Authors: Suzuki Ei‐ichiro , Ishikawa Kohki , Mihara Yasuhiro , Shimba Nobuhisa , Asano Yasuhisa 
Published: April 2007

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, please click on HTML or PDF.
Dye‐Sensitized Solar Cells Consisting of Ionic Liquid and Solidification
Authors: Ogomi Yuhei , Kato Takehito , Hayase Shuzi 
Published: April 2007

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, please click on HTML or PDF.
Molecular Similarity Concept and Its Use for Predicting the Properties of Chemical Compounds
Authors: Skvortsova M. I. , Stankevich I. V. , Palyulin V. A. , Zefirov N. S. 
Published: April 2007

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, please click on HTML or PDF.
Influence of NO on the Reduction of NO2 with CO over Pt/SiO2 in the Presence of O2
Authors: Li Ming‐Shi , Seshan K. , Lefferts Leon 
Published: April 2007

AbstractReduction of NO2 with CO in the presence of NO and excess oxygen, a model mixture for flue gas, over a 0.1% Pt/SiO2 catalyst was studied. The related reaction mechanisms, such as oxidation of CO and NO, were discussed. It was found that there was a narrow temperature window (180–190 °C) for the reduction of NO2 by CO. When the temperature was lower than the lower limit of the window, the reduction hardly occurred, while when the temperature was higher than the upper limit of the window, the direct oxidation of CO by O2 occurred and thereby NO2 could not be effectively reduced by CO. The presence of NO shifted the window to higher temperatures owing to the inhibition effect of NO on the activation of O2 on Pt, which made it possible to reduce NO2 by CO in flue gas.
DFT Study on the Origin of the Enantioselectivity of (S)‐4‐Hydroxylproline‐Catalyzed Direct Aldol Reaction between Acetone and 4‐Nitrobenzaldehyde
Authors: Fan Jian‐Fen , Wu Li‐Fen , Sun Yun‐Peng 
Published: April 2007

AbstractDFT‐B3LYP calculations were carried out to study the enantioselectivity of the (S)‐4‐hydroxylproline‐catalyzed direct aldol reaction between acetone and 4‐nitrobenzaldehyde. Four transition structures associated with the stereo‐controlling step of the reaction have been determined. They are corresponding to the anti and syn arrangements of the methylene moiety related to the carboxylic acid group in enamine intermediate and the si and re attacks to the aldehyde carbonyl carbon. The effect of DMSO solvent on the stereo‐controlling step was investigated with polarized continuum model (PCM). The computed energies of the transition states reveal the moderate enantioselectivity of the reaction.
Catalytic Kinetic Spectrophotometric Method for Determination of Phosphate Ion
Authors: Mitic Snezana , Zivanovic Valentina , Obradovic Mirjana , Tosic Snezana , Pavlovic Aleksandra 
Published: April 2007

AbstractThe kinetic method for the determination of phosphate microamounts was described. The developed method is based on catalytic effect of phosphate on sodium pyrogallol‐5‐sulphonate (PS) by dissolved oxygen. The reaction was followed spectrophotometrically by measuring the rate of change in the values of the absorbance of the oxidation product at 437 nm. The optimum reaction conditions are PS (0.44×10−3 mol·L−1) and HClO4 (3.6×10−6 mol·L−1) at 25 °C. Following this procedure, phosphate can be determined with a linear calibration graph up to 0.23 µg·mL−1. The interference effect of several species was also investigated and it was found that the most common cations and anions did not interfere with the determination. The developed procedure was successfully applied to the determination of phosphate in natural waters and soil.
Synthesis and Structure of a Novel Organic‐Inorganic Hybrid Polyoxovanadate, [Ni(bpp)2]2(V4O12) (bpp=1,3‐bi‐4‐pyridylpropane)
Authors: Zhang Li‐Juan , Hu Zheng‐Jun , Zhang Zhuo , Guo Hong‐You 
Published: April 2007

AbstractA novel organic‐inorganic hybrid polyoxovanadate, [Ni(bpp)2]2(V4O12) (bpp=1,3‐bi‐4‐pyridylpropane), was hydrothermally synthesized from a mixture of NiCl2·6H2O, NH4VO3, bpp, EtOH and H2O. The crystal structure consists of 2∞[Ni(bpp)2]2+, two‐dimensional networks interpenetrating perpendicularly with each other, and (V4O12)4−, cyclic tetranuclear clusters linking the 2∞[Ni(bpp)2]2+ networks to form a three‐dimensional coordination framework. The crystal belongs to tetragonal space group I41/a with unit cell parameters, a=2.14705 nm, c=1.29293 nm. UV‐Vis‐NIR reflectance spectroscopy study revealed insulator nature for the crystal with an optical energy gap of 2.70 eV.
Flow cytometric CD34+ stem cell enumeration: Lessons from nine years' external quality assessment within the Benelux countries
Authors: Levering Wilfried H. B. M. , Preijers Frank W. M. B. , van Wieringen Wessel N. , Kraan Jaco , van Beers Wil A. M. , Sintnicolaas Kees , van Rhenen Dick J. , Gratama Jan W. 
Published: March 2007

AbstractBackground:A biannual external quality assurance (EQA) scheme for flow cytometric CD34+ haematopoietic stem cell enumeration has been operational in the Benelux countries since 1996. In an evaluation of the results of 16 send‐outs, we studied the effects of the methods used on assay outcome and whether or not this exercise was effective in reducing between‐laboratory variation.Methods:Data were analyzed using robust multivariate regression. This approach is relatively insensitive to outliers and is used to assess the effect of methodological aspects of CD34+ cell counting on the bias and variability.Results:Five variables were associated with significant bias of absolute CD34+ cell counts: (i) unique laboratory number (ULN), (ii) gating strategy; (iii) CD34 mAb fluorochrome; (iv) type of flow cytometer, and (v) method of sample preparation. In addition, ULN and platform methodology (i.e., single vs. dual) contributed significantly to the variability of this assay. Overall, the variability in results of CD34+ cell enumeration has declined with time; in particular, after a practical workshop in which participants were trained to use the “single platform ISHAGE protocol.”Conclusions:Between‐laboratory variation in CD34+ cell enumeration can be reduced by standardization of methodologies between centres. Our approach, i.e., EQA with targeted training and feedback in response to reported results, has been successful in reducing the variability of CD34+ cell enumeration between participants. © 2007 Clinical Cytometry Society
Injektionsverfahren zur nachträglichen Abdichtung von Mauerwerk – neueste Erkenntnisse
Authors: Balak Michael 
Published: April 2007

AbstractIm Rahmen des Forschungsprojektes “Hydrophobierende und/oder porenverschließende Injektionsmittel” (gefördert durch die FFG Forschungsförderungsgesellschaft) wurden die Wirksamkeit und die Anwendungsgrenzen von hydrophobierenden und/oder porenverschließenden Injektionsmitteln zur nachträglichen Horizontalabdichtung von Mauerwerk unter besonderer Berücksichtigung der Einbringungsart untersucht. Obwohl Injektionsmittel zur nachträglichen Horizontalabdichtung bereits seit Jahrzehnten eingesetzt werden, zeigt die praktische Erfahrung immer wieder, dass die geforderten Ziele nicht erreicht werden. Im Rahmen einer wissenschaftlichen Arbeit wurde bestätigt, dass in ca. 60 % der gewerblichen Anwendungsfälle die geforderten Wirksamkeitskriterien nach ÖNORM B 3355‐1 nicht eingehalten wurden und dass durch die private Anwendung (Injektionsflaschen) sich dieser Wert noch erheblich erhöht.In Abhängigkeit des Durchfeuchtungsgrades (gering, mittel, hoch), der Einbringungsart (Injektionsflaschen, Nieder‐ bzw. Hochdruckverfahren, Impuls‐Sprühverfahren, Hohldochtverfahren) und des Wandbildners (Ziegelmauerwerk) wurden an einem Objekt in Wien und im Labor die Anwendungsgrenzen und die Wirksamkeit von acht Injektionsmitteln untersucht.
Baukonjunktur und Mauerwerksbau
Authors: Leuck Hans Georg 
Published: April 2007

AbstractHaben wir es nun endlich geschafft, seit einem Jahrzehnt wieder positiv über den Bau zu denken? Wer die zahlreichen Konferenzen am Rande der diesjährigen BAU in München und den Messeverlauf selbst verfolgt hat, kommt einerseits zu dem Schluss: Verhaltener Optimismus macht sich in der Tat breit! Ebenso eindeutig ist aber der Ruf zu hören, dass es nun darum geht, den Aufschwung auch wirklich zu verstetigen, damit er nicht nur ein vorübergehendes Gefühl bleibt.
Mikrowellen‐Rasterfeuchtemessungen – morphologische Beschreibung typischer Feuchteschäden in Bauwerken
Authors: Göller Arndt 
Published: April 2007

AbstractGrundvoraussetzung für die fachgerechte Sanierung von Feuchteschäden in Bauobjekten ist eine Diagnose. Gegenüber den bisher noch weit verbreiteten punktuell arbeitenden Messverfahren bieten Rasterfeuchtemessungen deutlich verbesserte Aussagekraft, liefern sie doch als Ergebnis Bilder der Feuchteverteilung in Bauteilen. Damit lassen sich alle in der Baupraxis auftretenden Feuchteschäden eindeutig klassifizieren und zuordnen. Die Erkennung von Kondensatfeuchten, aufsteigenden Feuchten oder Leckagen, die Detektion von Feuchteschäden aufgrund von Wärmebrücken und die Unterscheidung dieser Schäden von normaler Baurestfeuchte ist damit kein Problem mehr.
DGfM: Mauerwerk 2/2007
Authors: Rast Ronald 
Published: April 2007

Abstract1. DGfM‐Fachgespräch: Praxistipps und Hinweise aus der Rechtsprechung für die Bewertung von MauerwerkskonstruktionenMauerwerk auch im Nichtwohnbau eine echte AlternativeDeutscher Mauerwerkskongress 2007: Perspektiven für den MauerwerksbauDGfM‐Newsletter: Bereich Markt; Bereich Technik; Aktuell; Termine
Adrenal corticosteroids, their receptors and hypertension
Authors: Hu Xiao , Bolten Charles W. 
Published: April 2007

AbstractMineralocorticoids and glucocorticoids are primarily synthesized in the adrenal cortex, and play key roles in mediating physiological responses under stressful conditions, such as lack of water or nutrients. Both types of corticosteroid elevate blood pressure and elevated levels of these steroids are found in hypertensive patients. The major mineralocorticoid and glucocorticoid in humans are aldosterone and cortisol, respectively. Aldosterone activates the mineralocorticoid receptor (MR) and cortisol the glucocorticoid receptor (GR). In this overview, the clinical and genetic evidence that both MR and GR are involved in blood pressure regulation is reviewed as are the mechanisms by which MR and GR regulate blood pressure in response to agonists. MR antagonists have been used to treat hypertension. However, GR antagonists have not been fully explored in the clinic. Based on the prevalence of abnormal mineralocorticoid and glucocorticoid signaling in hypertension patients, it is proposed that antagonizing these adrenal corticosteroid receptors will provide benefit in treating hypertension. Drug Dev. Res. 67:871–883, 2006. © 2007 Wiley‐Liss, Inc.
Translating subjective language in letters of recommendation: the case of the sexist professor
Authors: Biernat Monica , Eidelman Scott 
Published: April 2007

AbstractLetters of recommendation typically use subjective language that is open to interpretation. In three studies, participants “translated” letters of recommendation for female and male applicants written by sexist, anti‐sexist, or “control” professors. Predictions were based on the shifting standards model [Biernat, Manis, & Nelson, 1991], the attributional principle of augmentation [Kelley, 1971, and models of “correction” for contamination [e.g., Wilson & Brekke, 1994]. Participants translated equivalent letters as indicating lesser ability in female than male applicants, particularly when the letter writer was described as sexist, but own impressions of the candidate diverged from those of the sexist writer. Differential standard use and attributional augmentation did not appear to be responsible for these effects. Instead, writer sexism triggered dislike and corrective processes in impression formation. Copyright © 2007 John Wiley & Sons, Ltd.
On the reliability of tower‐shaped structures under seismic excitations
Authors: Zembaty Zbigniew 
Published: March 2007

AbstractThis paper considers the problem of random vibrations and the reliability of slender tower‐shaped structures subjected to seismic excitations. Applying the concept of evolutionary spectra and the uniformly modulated random process as a model of strong ground motion, the response statistics are derived. Peak response values and reliability are then estimated. Results are related to Modified Mercalli and Arias intensities. With the aid of the Fast Fourier Transform technique a numerical analysis of peak response and reliability of a high‐rise reinforced concrete chimney has been carried out. Results indicate the location of seismic failures in the upper half of the shaft of the chimney. Finally, the paper briefly examines the influence of strong motion duration on the peak response and reliability.
Displacement‐proportional friction (DPF) in base isolation
Authors: Tadjbakhsh Iradj , Lin B. C. 
Published: March 2007

AbstractThe theoretical implications of an isolation mechanism that utilizes progressively increasing frictional resistance is investigated. This type of frictional resistance can be provided by the tightening together of a set of friction plates by compressive forces that increase with relative separations of the building and the foundation. The mathematical model of the device is developed and its numerical solutions are obtained. It is shown that in comparison with dry friction alone significant reductions in acceleration transmissibility and relative displacement transmissibility can be obtained.
Stochastic analysis of rigid foundation filtering
Authors: Harichandran Ronald S. 
Published: March 2007

AbstractThe effect of the space–time variation of earthquake ground motion on the translational response of structures supported on large rigid mat foundations is considered. A stochastic space–time ground motion model, based on the analysis of recordings from the SMART‐1 seismograph array in Lotung, Taiwan, is used. Random vibration theory is utilized to obtain an expression for the reduction in the maximum structural response, for a specified probability level and strong motion duration. Numerical computations are performed to examine the sensitivity of the reduction in structural response to various ground motion and structural parameters. The results indicate that spatial correlation and travelling wave effects give rise to significant reductions in structural responses when the seismic waves have low apparent propagation velocities. Utilization of this result in the design of structures on large foundations should yield substantial cost savings.
An error analysis of truncated starting conditions in step‐by‐step time integration: Consequences for structural dynamics
Authors: Hulbert G. M. , Hughes T. J. R. 
Published: March 2007

AbstractMost of the step‐by‐step time integration algorithms for structural dynamics require an initial acceleration vector to be specified, in addition to displacement and velocity vectors. A consistent initial acceleration vector may be calculated by solving the equations of motion at the initial time, while a truncated initial acceleration vector is obtained by setting the acceleration values to zero. Although the truncated starting procedure decreases computational effort, it is shown to affect accuracy adversely. For the structural dynamics algorithms considered herein, the rate at which the numerical solution converges to the exact solution is O(Δt) when the truncated starting procedure is used, compared to O(Δt2) when consistent initial acceleration values are used.
Analytical models for the rigid body motions of skew bridges
Authors: Maragakis Emmanuel A. , Jennings Paul C. 
Published: March 2007

AbstractThe rigid body motions of the bridge deck, along with the impact between the bridge deck and the abutments, were the source of extensive damage on skew highway bridges during the 1971 San Fernando earthquake. In this paper, a model for the rigid body motions of skew bridges is presented and analysed. The focus of the model is the appropriate representation of the impact between the bridge deck and the abutments and the explanation of the inducement of in‐plane rotational vibrations of the bridge deck as the result of this impact. A simplified model is briefly described first, and the kinematic mechanism of the problem is explained. Then, the analysis of a more detailed and realistic model follows. This model is applied on a short skew bridge located in Riverside, California. The response of this bridge to several earthquake shakings revealed that the planar rigid body rotations of the deck are induced primarily as a result of the skewness of the deck and the impact between the deck and the abutments.