bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Synthesis and Antibacterial Activity of Some New 2,5‐Disubstituted‐1,3,4‐oxadiazole Derivatives.
Authors: Somani Rakesh R. , Shirodkar Prabhakar Y. , Kadam Vilasrao J. 
Published: December 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: Synthesis of 2‐Arylpiperidines by Palladium Couplings of Aryl Bromides with Organozinc Species Derived from Deprotonation of N‐Boc‐Piperidine.
Authors: Coldham Iain , Leonori Daniele 
Published: December 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: A Convenient Synthesis of Pyrrolo[2,3‐b]pyridines and Pyrido[2′,3′:5,4]pyrrolo[2,3‐d]pyrimidines.
Authors: Abdel‐Mohsen Shawkat A. , Geies Ahmed A. 
Published: December 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: Cu2O‐Catalyzed Tandem Ring‐Opening/Coupling Cyclization Process for the Synthesis of 2,3‐Dihydro‐1,4‐benzodioxins.
Authors: Bao Weiliang , Liu Yunyun , Lv Xin , Qian Weixing 
Published: December 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: Design, Synthesis, and Antimicrobial Activity of Fused Triheterocyclic Nitrogen Systems Involving Tetrazolo[1,5‐b][1,2,4]triazines.
Authors: Taha Mamdouh A. M. , El‐Badry Susan M. 
Published: December 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: Two‐Step Regio‐ and Stereoselective Synthesis of cis‐Vinylstannanes.
Authors: Mirzayans Paul Malek , Pouwer Rebecca H. , Williams Craig M. 
Published: December 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: Lancifodilactone G: Insights about an Unusually Stable Enol
Authors: Chenoweth David M. , Chenoweth Kimberly , Goddard William A. III 
Published: December 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: Synthesis and Structure—Activity Relationships of Berberine Analogues as a Novel Class of Low‐Density‐Lipoprotein Receptor Up‐Regulators.
Authors: Yang Peng , Song Dan‐Qing , Li Ying‐Hong , Kong Wei‐Jia , Wang Yan‐Xiang , Gao Li‐Mei , Liu Shu‐Yu , Cao Rui‐Qiang , Jiang Jian‐Dong 
Published: December 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: Three New Compounds from Kadsura longipedunculata.
Authors: Sun Han‐Dong , et al. et al. 
Published: December 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: Synthesis and Biological Evaluation of Novel Isopropanolamine Derivatives as Non‐Peptide Human Immunodeficiency Virus Protease Inhibitors.
Authors: Zhou Lijun , Yang Qingang , Wang Yong , Hu Youhong , Luo Xiaomin , Bai Donglu , Li Shukun 
Published: December 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: Organometallic Synthesis of Nanoparticles
Authors: Amiens C. , Chaudret B. 
Published: December 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: Nucleophilic Difluoromethylation and Trifluoromethylation Using Tetrakis(dimethylamino)ethylene (TDAE) Reagent
Authors: Medebielle Maurice , Dolbier William R. Jr. 
Published: December 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: 2‐Heteroatom‐Substituted Aldehydes and Sugar Aldehydes
Authors: Eckhardt M. 
Published: December 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: 2,2‐Diheteroatom‐Substituted Aldehydes
Authors: Harmata M. 
Published: December 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: Aliphatic and Alicyclic Aldehydes: Synthesis by C‐3 Elongation
Authors: Goettlich R. 
Published: December 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: Aliphatic and Alicyclic Aldehydes: Synthesis by C‐2 Elongation
Authors: Goettlich R. 
Published: December 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: Palladium‐ or Nickel‐Catalyzed Cross‐Coupling Reactions with Organozincs and Related Organometals
Authors: Negishi Ei‐ichi , Hu Qian , Huang Zhihong , Wang Guangwei , Yin Ning 
Published: December 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: Synthesis and Reactions of Allenylzinc Reagents
Authors: Marshall James A. 
Published: December 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: Dynamic Behavior of Organozinc Compounds
Authors: Guijarro Albert 
Published: December 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: Carbopalladation—Cyclopalladation Sequences
Authors: Catellani Marta , Motti Elena 
Published: December 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: The Origins of Photocatalysis
Authors: Teichner S. J. 
Published: December 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 Principles and Applications of Resonance Energy Transfer
Authors: Andrews David L. 
Published: December 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.
Direct Visualization of the Chemical Mechanism in SERRS of 4‐Aminothiophenol/Metal Complexes and Metal/4‐Aminothiophenol/Metal Junctions
Authors: Sun Mengtao , Xu Hongxing 
Published: December 2008

AbstractDirect visualization of photoinduced tunneling charge transfer (TCT) in an Au5/para‐aminothiophenol (PATP)/Ag6 junction in which Au and Ag clusters form the first and second layer, respectively, is provided by the charge difference density (see picture; green and red stand for holes and electrons, respectively).magnified imageWe theoretically investigate the mechanism of chemical enhancement of surface‐enhanced resonance Raman scattering (SERRS) of para‐aminothiophenol (PATP)/metal complexes and metal/PATP/metal junctions. The method of charge difference density is used to visualize intracluster excitation and charge transfer (CT) between PATP and metal during the process of resonant electronic transitions. It is found that the selective enhancement of the b2 mode in SERRS spectra result not only from Albrecht’s A term (the Frank–Condon term), but also from the Herzberg–Teller term (Albrecht’s B mechanism) via resonant CT. For the metal/PATP/metal junctions, the calculated results reveal that the Raman spectrum is of SERRS nature and the nontotally symmetric b2 mode is strongly enhanced at the incident wavelength of 1064 nm when Au and Ag nanoparticles are the first and second layer, respectively, and the dominant enhancement mechanism is the Herzberg–Teller term in chemical enhancement via tunneling charge transfer (intervalence electron transfer from the Ag cluster to the Au cluster). When the first and second layers were inverted (i.e. the Ag and Au nanoparticles are the first and second layers, respectively), the Raman spectrum at an incident wavelength of 1064 nm is due to normal Raman scattering, and the nontotally symmetric b2 mode is not strongly enhanced. Our theoretical results not only support the experimental findings, but also provide a clear physical interpretation.
Synthesis, structure and photoluminescence of a 3D pillared heterometallic coordination polymer containing 2D inorganic cadmium‐potassium‐oxide layer subunits
Authors: Liu Qing‐Yan , Wang Yu‐Ling , Liu Jiu‐Hui 
Published: December 2008

AbstractSelf‐assembly of Cd(NO3)2 with o ‐phthalic acid monopotassium salt (KHphth) in the presence of ethylenediamine (en) produced a new heterometallic coordination polymer [CdK2(phth)2(en)0.5(H2O)]n (1). Single‐crystal X‐ray analyses reveal that it crystallizes in a monoclinic space group P 21/c. a = 11.6707(6) Å, b = 8.1019(4) Å, c = 20.9503(11) Å, β = 94.6640(10)o. The complex displays an en‐pillared 3D framework, which is constructed from 2D [CdK2(phth)2(H2O)]n layers featuring uncommon inorganic cadmium‐potassium‐oxide layers containing potassium‐oxide layers. In the solid state, complex 1 shows photoluminescence with the maximum emission intensities at 355 nm upon excitation at 312 nm. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Pellet – Plasma Interaction: an Analysis of Pellet Injection Experiments by Means of a Multi‐Dimensional MHD Pellet Code
Authors: Lengyel L.L. , Schneider R. , Kardaun O.J.W.F. , Burhenn R. , Zehrfeld H.P. , Veselova I.Yu. , Senichenkov I.Yu. , Rozhansky V.A. , Lalousis P.J. 
Published: December 2008

AbstractThis work is aimed at the analysis of pellet injection experiments by means of a magnetohydrodynamic code that computes the processes of pellet ablation, expansion, ionization, and magnetic confinement of the ablated substance. In particular, experimental pellet injection scenarios stemming from the tokamak ASDEX‐Upgrade (D2 pellets) and the stellarator W7‐AS (carbon pellets) are analyzed by means of this time‐dependent quasithree‐dimensional MHD pellet code. Pellet penetration depths measured in ASDEX‐Upgrade at LFS (low‐field‐side) and HFS (high‐field‐side) pellet injection, are compared with computational results.It was found that the penetration depths of deuterium pellets observed in about twenty randomly selected LFS and HFS injection scenarios could accurately be reproduced by a single code in which drift effects were intentionally ignored. This may be understood as an indication of the negligible effect drift exerts on the ablation process. At the same time, the distribution of the ablated and partially ionized substance may very well be affected by the drift of the ionized particles in the direction of the decreasing magnetic field.With the help of the Dα radiation patterns observed, the magnitudes of the heat fluxes affecting the pellet and the ablation cloud were estimated. The calculations show that the thermal heat fluxes (electron and ion) acting along the magnetic field lines are not sufficient to explain the size of the radiating filaments observed.The effect of extra‐thermal electrons on the ablation history of pellets injected in W7‐AS is demonstrated: the particle end energy fluxes causing measured pellet ablation profiles are determined.Based on a statistically well‐designed computational data set, an empirical scaling of the penetration depths in terms of the background plasma parameters was attempted. It is shown that the form of the temperature profile of the background plasma cannot be ignored while deriving scaling laws; the specification of the central or the bulk temperature alone is insufficient.Quantitative data are provided for the magnitudes of various additional processes such as the anomalous thermal conduction across the field lines or the grad(B)‐induced drift of the shielding cloud surrounding the pellet.The modelling of supersonic gas jets, a fuelling method that appears to be an alternative to pellet injection, is also considered. Since the massive stream of a cold gas represents a disturbance for the recipient plasma similar to that of a pellet, its dynamics can be described by the same means as the evolution of pellet clouds. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Triflic Acid Mediated Dealkylative Lactonisation via NMR‐Observable Alkyloxonium Intermediates
Authors: Muñoz M. Paz , Lloyd‐Jones Guy C. 
Published: December 2008

AbstractTrifluoromethanesulfonic acid (TfOH) efficiently induces the dealkylative cyclisation of pent‐4‐enoates to generate γ‐lactones with high selectivity. For primary alkyl esters bearing an additional alkene, only monolactonisation occurs, even in the presence of excess TfOH. The kinetics of the reaction have been studied by 1H NMR spectroscopy, which reveal that the TfOH acid undergoes a self‐catalysed reaction with the pent‐4‐enoate to generate an oxonium triflate intermediate (rate ≈ kobsd.[TfOH]2[ester]1), possibly via the dimer (TfOH)2. The oxonium triflate intermediate then evolves to the γ‐lactone according to unimolecular kinetics, liberating MeOTf in an SNi reaction. 2H‐labelling experiments with TfOD suggest that the acid protonates the carbonyl moiety of the ester, with subsequent intramolecular delivery of D+ to the alkene. The resulting carbocation is transient, being rapidly captured intramolecularly to generate the oxonium species. Reversibility in this step mediates equilibration of diastereomeric oxonium intermediates via the carbocation. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
Recent progress of polar stationary phases in CEC and capillary liquid chromatography
Authors: Dong Xiaoli , Wu Ren'an , Dong Jing , Wu Minghuo , Zhu Yan , Zou Hanfa 
Published: December 2008

AbstractThe stationary phases including the nonpolar and polar stationary phases in microscale separations have been greatly developed. This review describes the recent progress of the polar stationary phases (PSPs) with the focus on their preparation and the interesting applications in the field of CEC and capillary liquid chromatography (CLC) covering the literatures from the middle of 2006 to the middle of 2008. The PSPs described herein were summarized into three types as open‐tubular, particle‐packed and monolithic stationary phases for either CEC or CLC, and the separation mechanisms are of hydrophilic interaction, chiral selection, ion‐exchange and/or electrostatic interaction, etc. After overviewing the literatures published in the last 2 years, the research efforts on PSPs for CEC and CLC have been remaining in the fabrication of open‐tubular and monolithic capillary columns; whereas, the research endeavor of PSPs on particulate‐packed format seemed to decline most likely due to the commercial availability of various packing particles for CEC and CLC.
Die Festgesteinsschildmaschine, Interaktion zwischen Gebirge und Vortriebssystem, Kompetenz‐ und Risikoverteilung
Authors: Lauffer Harald 
Published: December 2008

AbstractFestgesteinsschildmaschinen mit ihren Bauformen Einfachschild (TBM‐S) und Doppelschild (TBM‐DS) haben sich einen wesentlichen Markanteil erobert. Sie werden für einen Vortrieb im Festgestein geringer Standzeit im nachbrüchigen bis gebrächen Gebirge empfohlen. Die Überlegungen über die Interaktion zwischen Gebirge und Vortriebssystem bestätigen die Annahme, dass eine systematische Gebirgsstützung weder im Schneidradbereich noch im Schildbereich gegeben ist. Unter gewissen Umständen kann es jedoch im Schildbereich zur Ausbildung eines sekundären Traggewölbes im aufgelockerten Gebirge kommen. Es zeigt sich, dass vermutete negative Wirkungen des Schneidrads auf die Ortsbrust nicht auftreten und das Lösen weitgehend schonend erfolgt. Der Einsatz von Schaum zur Auffüllung von Nachbrüchen und zur Stabilisierung des Gebirges hat sich bewährt. Portalbereiche und Bereiche geringer Überdeckung sind erforderlichenfalls möglichst vorweg von über Tage aus zu ertüchtigen.Im Fall von Nachbruch‐ und Verbrucherscheinungen an der Ortsbrust und der Tunnelleibung können Maschinenparameter wie Drehmoment und Vorschubkraft und Bohrkopfdetails das Verhalten einer Festgesteinsschildmaschine in dieser Grenzsituation stark beeinflussen. Da das Baugrundrisiko grundsätzlich dem Auftraggeber zuzuordnen ist, muss sich der Auftraggeber mit diesen Szenarien intensiv auseinandersetzten und eventuell entsprechende Vorgaben für die Gestaltung der TBM machen ohne den Auftragnehmer allzu sehr einzuschränken. Für einen erfolgreichen Vortrieb mit Festgesteinsschildmaschinen im Grenzbereich ist eine partnerschaftliche Zusammenarbeit in allen Phasen der Bauabwicklung von der Vergabe, über die Abstimmung der TBM‐Details bis zur Abwicklung des Vortriebs von größerer Bedeutung. Kürzere und längere, planbare und ungeplante Unterbrüche sind bei TBM‐Vortrieben unvermeidbar und systembedingt. Die baubetrieblichen Risiken von Unterbrüchen sind der Auftragnehmer‐Sphäre, die Folgen für das Verhalten des Gebirges aufgrund einer verlängerten Stehzeit sind der Risikosphäre des Auftraggebers zuzuordnen.
37. Geomechanik‐Kolloquium in Freiberg
Authors: Hausdorf Axel 
Published: December 2008

AbstractDas 37. Geomechanik‐Kolloquium, das gemeinsam vom Lehrstuhl fürGebirgsund Felsmechanik/Felsbau am Institut für Geotechnik der TU Bergakademie Freiberg, dem IfG – Institut für Gebirgsmechanik GmbH, Leipzig, sowie dem Verein Freiberger Geotechniker e. V. (VFG) veranstaltet wurde, fand mit über 160 Teilnehmern am 14. November 2008 in Freiberg statt. In seiner Begrüßung zur Eröffnung des Kolloquiums unterstrich Professor Heinz Konietzky, Inhaber des veranstaltenden Lehrstuhls fürGebirgsund Felsmechanik, die Bedeutung der Forschung auf dem Gebiet der Geomechanik und stellte dabei aktuelle Forschungsprojekte an seinem Lehrstuhl vor:– Untersuchungen zur Herstellung hochfester Materialien (z. B. für die Verwendung als Bohr‐ und Gewinnungswerkzeuge) aus Mitteln der Krüger‐Stiftung,– Mikromechanische Untersuchung und Modellierung heterogener Systeme,– Untersuchung und Simulation der Verwitterung von Kreidesandstein.