bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: New Biologically Active Epidioxysterols from Stereum hirsutum.
Authors: Cateni Francesca , Doljak Bojan , Zacchigna Marina , Anderluh Marko , Piltaver Andrej , Scialino Giuditta , Banfi Elena 
Published: February 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 Highly Stereocontrolled Total Synthesis of Dysiherbaine.
Authors: Takahashi Keisuke , Matsumura Takashi , Ishihara Jun , Hatakeyama Susumi 
Published: February 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: Scope and Mechanism of Direct Indole and Pyrrole Couplings Adjacent to Carbonyl Compounds: Total Synthesis of Acremoauxin A and Oxazinin 3.
Authors: Richter Jeremy M. , Whitefield Brandon W. , Maimone Thomas J. , Lin David W. , Castroviejo M. Pilar , Baran Phil S. 
Published: February 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: Enantioselective Synthesis of (‐)‐Platensimycin Oxatetracyclic Core by Using an Intramolecular Diels—Alder Reaction.
Authors: Ghosh Arun K. , Xi Kai 
Published: February 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: Rapid Access to Polyprenylated Phloroglucinols via Alkylative Dearomatization—Annulation: Total Synthesis of (.+‐.)‐Clusianone.
Authors: Qi Ji , Porco John A. Jr. 
Published: February 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: 7‐(3‐Benzyloxypropyl)apigenin (I), a Novel Cytotoxic Flavone Derivative
Authors: Park Kwang‐su , Kim Jinyoung , Lee Chae Woon , Park Jisook , Park Hyung Soon , Chong Youhoon 
Published: February 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: Preparation, Reactivity, and Thermal Stability of Nanoscaled Group III‐V Semiconductors
Authors: Xie Yi , Guo Qixun 
Published: February 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 Electrochemistry: Origins, Development, and Future
Authors: Geiger William E. 
Published: February 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: Aldehyde N,N‐Dialkylhydrazones as Neutral Acyl Anion Equivalents: Umpolung of the Imine Reactivity
Authors: Brehme Rainer , Enders Dieter , Fernandez Rosario , Lassaletta Jose M. 
Published: February 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: Probing Glycans with the Copper(I)‐Catalyzed [3 + 2] Azide—Alkyne Cycloaddition
Authors: Hanson Sarah R. , Greenberg William A. , Wong Chi‐Huey 
Published: February 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: Alkaloids
Authors: Dalton David R. , Mascavage Linda M. , Wilson Michael 
Published: February 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 Remarkable Metal‐Catalyzed Olefin Metathesis Reaction
Authors: Hoveyda Amir H. , Zhugralin Adil R. 
Published: February 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: IUPAC‐NIST Solubility Data Series. Part 83. Acetonitrile: Ternary and Quaternary Systems
Authors: Sazonov Valerii P. , Shaw David G. , Skrzecz Adam , Lisov Nikolai I. , Sazonov Nikolai V. 
Published: February 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: Crystal Engineering: A Holistic View
Authors: Desiraju Gautam R. 
Published: February 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.
Waste management modeling with PC‐based model — EASEWASTE
Authors: Bhander Gurbakhash S. , Hauschild Michael Z. , Christensen Thomas H. 
Published: February 2008

AbstractAs life‐cycle‐thinking becomes more integrated into waste management, quantitative tools are needed for assessing waste management systems and technologies. This article presents a decision support model to deal with integrated solid waste management planning problems at a regional or national level. The model is called EASEWASTE (environmental assessment of solid waste systems and technologies). The model consists of a number of modules (submodels), each describing a process in a real waste management system, and these modules may combine to represent a complete waste management system in a scenario. EASEWASTE generates data on emissions (inventory), which are translated and aggregated into different environmental impact categories, e.g. the global warming, acidification, and toxicity. To facilitate a “first level” screening evaluation, default values for process parameters have been provided, wherever possible.The EASEWASTE model for life‐cycle‐assessment of waste management is described and applied to a case study for illustrative purposes. The case study involving hypothetical but realistic data demonstrates the functionality, usability, and flexibilities of the model. The design and implementation of the software successfully address the substantial challenges in integrating process modeling, life‐cycle inventory (LCI), and impact assessment (LCIA) modeling, and optimization into an interactive decision support platform. © 2008 American Institute of Chemical Engineers Environ Prog, 2008
Chitin synthesis inhibitor effect on Aedes aegypti populations susceptible and resistant to organophosphate temephos
Authors: Martins Ademir Jesus , Belinato Thiago Affonso , Lima José Bento Pereira , Valle Denise 
Published: February 2008

AbstractBACKGROUND: In Brazil, dengue vector control is hampered by the resistance of Aedes aegypti L. populations to organophosphates (OPs). Insect growth regulators (IGRs) are a promising alternative, as their mechanisms of action are different from those of conventional insecticides. The authors analysed the effect of the IGR triflumuron, a chitin synthesis inhibitor, on the Ae. aegypti insecticide‐susceptible strain Rockefeller, as well as on field populations both susceptible (TemS) and resistant (TemR) to the OP temephos.RESULTS: Triflumuron arrested development and inhibited adult emergence of the Rockefeller strain in a dose‐dependent way (EI50 and EI90 of 0.8 and 1.8 µg L−1 respectively). A direct relationship between triflumuron concentration and the precocity of its effects was evident. TemS and TemR temephos resistance ratios (RR90) were 4.5 and 13.8, triflumuron RR90 being 1.0 and 1.3 respectively.CONCLUSION: The IGR triflumuron exhibited a dose‐dependent effect against the reference Ae. aegypti Rockefeller strain. It was also effective against two field populations, regardless of their OP resistance status. The present results are discussed in the context of utilization of chitin synthesis inhibitors as potential alternatives in the control of Ae. aegypti in Brazil. Copyright © 2008 Society of Chemical Industry
Hopping energy relaxation of localized excitons in GaP(N)
Authors: Niebling T. , Rubel O. , Heimbrodt W. , Stolz W. , Baranovskii S. D. , Klar P. J. , Geisz J. F. 
Published: February 2008

AbstractLow‐temperature kinetics of the energy transfer of localized optical excitations in a nitrogen‐doped GaP bulk sample with a nitrogen content of 2.1 % is studied by means of time‐resolved spectroscopy. Both spectral and time dependence of the photoluminescence decay are described quantitatively in a time range from nanoseconds to microsecond by a phenomenological theory of hopping and energy relaxation of localized excitons. The density of localized states and their energy distribution are determined by comparison of experiment and theory. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Hopping transport of interacting carriers in disordered organic materials
Authors: Novikov Sergey V. 
Published: February 2008

AbstractComputer simulation of the hopping charge transport in disordered organic materials has been carried out explicitly taking into account charge‐charge interactions. This approach provides a possibility to take into account dynamic correlations that are neglected by more traditional approaches like mean field theory. It was found that the effect of interaction is no less significant than the usually considered effect of filling of deep states by noninteracting carriers. It was found too that carrier mobility generally increases with the increase of carrier density, but the effect of interaction is opposite for two models of disordered organic materials: for the non‐correlated random distribution of energies with Gaussian DOS mobility decreases with the increase of the interaction strength, while for the model with long range correlated disorder mobility increases with the increase of interaction strength. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Photoconductivity in amorphous selenium blocking structures
Authors: Reznik A. , Baranovskii S. D. , Rubel O. , Jandieri K. , Rowlands J. A. 
Published: February 2008

AbstractPhotoconductive properties of the first practical a‐Se avalanche photosensor (hole drift mobility, photocurrent response time, quantum yield of charge photogeneration and avalanche multiplication gain) have been studied. It has been shown that hole transport and avalanche multiplication mechanisms in multilayered a‐Se blocking structure used in practical photosensors are similar to those observed in a‐Se monolayers confined between insulating layers and used for the first manifestation of avalanche effect in this material by Juska and Arlauskas, phys. stat. sol. (a) 59, 389 (1980). It is suggested that combination of high avalanche gain (up to 1000) with high quantum efficiency of charge photogeneration (almost 100%) and fast photocurrent time response (∼ 1 ns) makes a‐Se avalanche photosensor a promising candidate to replace vacuum photomultiplier tubes for application in medical radiation imaging. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Effect of screening on slow relaxation of excess conductance in two‐dimensional array of tunnel‐coupled quantum dots
Authors: Stepina N. P. , Koptev E. C. , Nenashev A. V. , Dvurechenskii A. V. , Nikiforov A. I. 
Published: February 2008

AbstractThe excess conductivity relaxation in two‐dimensional array of tunnel‐coupled Ge/Si quantum dots (QDs) was studied for the samples with Coulomb and screened‐Coulomb interaction in hopping regime. The screening of long‐range electron‐electron (e‐e) interaction in the sample with metal plane, put close to the dot layer, was revealed in the crossover from Efros‐Shklovskii variable‐range hopping to the Mott one. It was shown that the relaxation both in interacting and non‐interacting systems is described by stretched exponential law. Characteristic time for the unscreened sample linearly scales with the exciting field. Screening of the electron‐electron interaction suppresses the dependence of the relaxation behavior on the bias voltage and accelerates the relaxation process. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Tribological and electrical study of fluorinated diazonium films as dry lubricants for electrical contacts
Authors: Alamarguy David , Benedetto Alessandro , Balog Mirela , Noël Sophie , Viel Pascal , Derf Franck Le , Houzé Frédéric , Sallé Marc , Palacin Serge 
Published: February 2008

AbstractThe need to operate in extreme environmental conditions (ultra high vacuum, high temperatures, aerospatial, etc.) and the miniaturisation toward microelectromechanical system is demanding new materials in the field of low‐level electrical contacts lubrication. A dry and chemically immobilised layer avoiding the traditional wet lubricating fluids would have many advantages.We report here the first results on films obtained by the electrochemical reduction of different diazonium salts and their use as protective coatings able to lubricate the metallic surfaces of an electrical contact while preserving at the same time electrical conduction.The physicochemical properties of the films, elaborated from various diazonium salts, were studied by cyclic voltammetry and ATR FT‐IR spectroscopy. Atomic force microscope was combined with a home‐made wide‐range current measurement system to investigate simultaneously the mechanical and electrical interactions between the doped diamond conductive tips and the evaporated gold surfaces coated with the diazonium films. The analysis of the simultaneous mechanical and electrical properties of the films in a nanocontact situation is shown to bring much insight into the electrical contact application. Copyright © 2008 John Wiley & Sons, Ltd.
Cervical length for prediction of preterm birth in women with multiple prior induced abortions
Authors: Visintine J. , Berghella V. , Henning D. , Baxter J. 
Published: February 2008

AbstractObjectiveTo determine whether transvaginal sonographic cervical length predicts preterm birth in women with multiple prior induced abortions.MethodsThis was a retrospective cohort study using the Thomas Jefferson University Prematurity Database. Patients with a singleton pregnancy and a history of more than one induced abortion were identified. Exclusion criteria were cerclage and indicated preterm birth. Subjects were followed with transvaginal ultrasound measurement of the cervix between 14 and 24 weeks' gestation and grouped into those with and those without a short cervix; a cervical length of < 25 mm was considered short. The primary outcome was spontaneous preterm birth at < 35 weeks.ResultsFifteen of the 65 (23%) women with more than one induced abortion included in the study had a short cervix. The demographics and risk factors were similar between those with and those without a short cervix. The overall incidence of preterm birth was 21.5% (14/65); in women with a short cervix the incidence was 47% (7/15) and in women without a short cervix it was 14% (7/50). The sensitivity, specificity and positive and negative predictive values of a short cervix in the prediction of preterm birth were 50%, 84%, 47% and 86%, respectively. The relative risk of a short cervix for spontaneous preterm birth was 3.3 (95% CI, 1.4–7.4).ConclusionA cervical length of < 25 mm on transvaginal ultrasound is predictive of preterm birth in women with more than one prior induced abortion. Women with multiple prior induced abortions and a short cervix have a 3.3‐fold greater chance of spontaneous preterm birth compared with those with a cervical length of ≥ 25mm. Copyright © 2008 ISUOG. Published by John Wiley & Sons, Ltd.
Psychosocial Conditions of Women Awaiting Genetic Counseling: A Population‐based Study
Authors: Mikkelsen Ellen M. , Sunde Lone , Johansen Christoffer , Johnsen Søren P. 
Published: February 2008

AbstractThe decision whether to undergo genetic counseling for hereditary breast and ovarian cancer is complex. Knowledge about the psychosocial conditions of women who are awaiting counseling is sparse. We aimed to compare the psychosocial conditions of women awaiting genetic counseling with those of women in two reference groups. We included 567 women referred to genetic counseling for hereditary risk of breast or ovarian cancer (Genetic Group), 689 women referred to mammography (Mammography Group) and a random sample of 2,000 women from the general population (Population Group). One to 4 weeks before the first counseling session or mammography, data were collected by questionnaires. Both women affected with cancer and unaffected women in the Genetic Group appeared to have a somewhat higher prevalence of cancer‐specific‐distress than the corresponding reference groups. Further research on the effect of pre‐ counseling interventions appear warranted in addition with exploring a potential association between waiting time and cancer‐specific distress.
Balloon borne observations of backscatter, frost point and ozone in polar stratospheric clouds at the South Pole
Authors: Rosen James M. , Kjome Norman T. , Oltmans Samuel J. 
Published: February 2008

Concurrent backscatter and ozone measurements were made with near‐simultaneous frost point soundings over the South Pole when the center of the 1990 winter vortex was at or very near that location. The initial water vapor concentration in the stratosphere was ∼5ppmv and decreased to ∼1.5–2.0 ppmv as cooling took place. By mid‐July the stratospheric temperature had decreased to the frost point and heavy polar stratospheric cloud (PSC) activity was observed presumably due to the condensation of water vapor. The lowest water vapor concentrations observed correspond to saturated air at the lowest temperatures encountered. The slow recovery of the water vapor concentration during spring warming indicates that the 12 to 22 km altitude region in the vortex is not readily penetrated by outside air.The observed large decrease in PSC backscatter above ∼14 km before the stratosphere began to warm is consistent with loss of particles by sedimentation leading to significant dehydration and denitrification, The region of PSC activity in July is noted to be in the same region in which ozone depletion and the persistent dehydration is observed later in the year. At the end of August heavy PSC activity was observed in the lower stratosphere and upper troposphere, consistent with earlier observations from NASA aircraft. These lower clouds were in a region that apparently was still experiencing cooling. No compelling evidence was found supporting earlier claims that PSC layers are anti‐correlated with ozone inside the vortex.
An overview of the post‐Messinian paleoenvironmental history of the western Mediterranean
Authors: Thunell R. , Rio D. , Sprovieri R. , Vergnaud‐Grazzini C. 
Published: February 2008

A review of the Pliocene‐Pleistocene paleoenvironmental history of the western Mediterranean is presented based on micropaleontological and geochemical studies of Ocean Drilling Program (ODP) leg 107 material and marine outcrops in southern Italy. The calcareous plankton biochronology proposed for the Mediterranean by Rio et al. (1990 and 1991a) provides the necessary age control for determining the timing of major climatic and oceanographic changes in the region. The early Pliocene period in the Mediterranean was not a time of warm, stable climate; rather, it was marked by relatively high‐amplitude climatic oscillations. In marginal areas, these climatic oscillations resulted in the rhythmic deposition of limestone‐marl couplets which have an average duration of approximately 19,000 years. It is proposed that these sedimentary couplets are the result of precessionally induced changes in monsoon intensity which in turn cause variability in coastal divergence and upwelling. The δ18O and the calcareous plankton (foraminifera and coccoliths) records for Tyrrhenian Sea ODP site 653 reveal a cooling of surface waters at ∼3.1 Ma. Coincident with this cooling is an increase in the frequency of diatomite formation in southern Italy (Bianco section). The global cooling at ∼2.4 Ma and the associated expansion of northern hemisphere glaciation resulted in a shift to more arid conditions in the Mediterranean region. This climate change may have altered the Mediterranean water balance, resulting in the establishment of antiestuarine water exchange with the Atlantic at this time.The δ18O record for site 653 is also marked by a sharp cooling across the Pliocene/Pleistocene boundary. In the boundary stratotype section at Vrica, this cooling is manifested as an increase in the abundance of the planktonic foraminifer Neogloboquadrina pachyderma.
Satellite and ground observations of HIPAS VLF modulation
Authors: Kimura I. , Wong A. , Chouinard B. , Okada T. , Mccarrick M. , Nagano I. , Hashimoto K. , Wuerker R. , Yamamoto M. , Ishida K. 
Published: February 2008

Joint experiments between the new Japanese satellite EXOS‐D (Akebono) and the HIPAS (High Power Active stimulation) facility located at Fairbanks, Alaska were made in 1989. The HF radiation was modulated in amplitude by 2.5 kHz signal. On November 28, 1989, EXOS‐D detected the VLF signal at an altitude of 2300 km with an E field of 15 μV/m and a B field of 0.25 pT. The angle between the wave normal and the geomagnetic field was found to be less than 20°.Simultaneous ground observations were made using loop antennas at a distance about 35 km from HIPAS. The 2.5 kHz signal amplitude there at the time of the satellite observation was 1.3 pT. If this wave magnetic field is assumed to be due to an ionospheric AC current of 0.65 A, the signal strength at the satellite is roughly consistent within a factor of 3, which is much better consistency than those observed by James et al. (1984).