bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: CYCLIC DIAZASTANNYLENES. XIV. TETRAMERIC 1‐OXA‐2‐SILA‐3‐AZA‐4Λ2‐STANNETIDINES WITH S4 SYMMETRY
Authors: VEITH M. , GROSSER M. 
Published: April 2016

AbstractDas Stannylen (II) setzt sich mit dem Trimethoxybenzaldehyd (I) zu dem Trimethoxybenzaldehyd‐tert.‐butylimin (IV) und der im Titel genannten Verbindung (III) um.
ChemInform Abstract: ARYLATION AND VINYLATION OF IRON PORPHYRINS. DOUBLE ELECTROCHEMICAL INDUCTION OF A NUCLEOPHILIC SUBSTITUTION
Authors: LEXA D. , SAVEANT J.‐M. 
Published: April 2016

AbstractMittels cyclisch‐voltammetrischer Untersuchungen wird gezeigt, daß durch Elektrolyse einer Mischung von Aryl‐ oder Vinylhalogeniden (4‐Brombenzonitril, Iodbenzol, 1‐Bromnaphtha1in, 1‐Brom‐2,2‐bis‐[4‐chlorphenyl]‐ ethylen) mit einem Eisenporphyrin 0‐Aryl‐ und o‐Vinyleisenporphyrine gebildet werden.
ChemInform Abstract: Cobalt(II) Complexes of o‐Dimethylaminophenyldimethylphosphine, o‐Dimethylphosphinophenyldimethylarsine and Related Ligands.
Authors: HALE A. L. , LEVASON W. , TUTTLEBEE H. E. 
Published: April 2016

AbstractDer Ligand L′ bildet mit Co‐halogeniden und ‐thiocyanat in EtOH oder 2‐Propanol nur l:l‐Komplexe (Ia), die pseudo‐ tetraedrisch koordiniert sind, liefert aber in Gegenwart von Co‐perchlorat in der gleichen Reaktion fünffach‐koordinierte low‐spin‐2:1‐Komplexe (III).
ChemInform Abstract: METAL ION COMPLEXES OF AMINO ACIDS. PART II. THE COPPER COMPLEXES OF THE α‐ AND β‐ISOMERS OF N‐OXALYL‐L‐α,β‐DIAMINOPROPIONIC ACID
Authors: O'BRIEN P. , NUNN P. B. 
Published: April 2016

AbstractDie Cu‐Komplexe (I) und (II) wurden durch Reaktion äquimolarer Lösungen von Cu‐acetat und den Monohydraten der beiden Aminosäuren dargestellt unddurch Absorptionsmaxima, IR‐ und ESR‐ Spektren charakterisiert.
ChemInform Abstract: Complexes of the Platinum Metals. Part 22. Synthesis and Molecular Dynamics of 1,3‐Diaryltriazenido Derivatives.
Authors: CRESWELL C. J. , QUEIROS M. A. M. , ROBINSON S. D. 
Published: April 2016

AbstractDa bei bisher bekannten Reaktionswegen ausgehend von Metallhydriden oder Metall(0)‐Komplexen der Bereich der Triazenido‐Komplexe begrenzt ist, wurden Reaktionen mit Halogenidkomplexen als Ausgangsverbindungen in Gegenwart von NEt3 untersucht.
ChemInform Abstract: STEREOSPECIFIC TOTAL SYNTHESIS OF AJUGARIN‐IV
Authors: KENDE A. S. , ROTH B. , KUBO I. 
Published: April 2016

AbstractNach an sich bekannten Verfahren wird aus dem Octalindion (I) in 21 Stufen da‐s Insekticid Ajugarin‐IV (II) synthetisiert.
ChemInform Abstract: A CONVENIENT SYNTHESIS OF 4‐HYDROXYESTRADIOL TRIACETATE (ESTRA‐1,3,5(10)‐TRIENE‐3,4,17β‐TRIOL TRIACETATE)
Authors: KIRK D. N. , SLADE C. J. 
Published: April 2016

AbstractÖstradiol (Ia) reagiert mit Quecksilber(II)‐acetat in Gegenwart von Perchlorsäure zum Quecksilberderivat (Ib), das über das Diacetat in ein Gemisch aus 4‐Hydroxy‐östradioltriacetat (II) und Östradioldiacetat (III) umgewandelt wird.
ChemInform Abstract: STUDY OF MICROBIAL TRANSFORMATION PRODUCTS OF 19‐HYDROXYSITOSTEROL
Authors: KOLYVANOVA T. S. , BAYUNOVA B. I. , GABINSKAYA K. N. , KOROBOVA YU. N. , GRINENKO G. S. 
Published: April 2016

AbstractMan erhält das 3‐Acetat des 19‐4Hydroxy‐sitosterins (V) ausgehend von Sitosterin‐3‐acetat (I) (Sitosterin ist aus Abfällen der Holzverarbeitung zugänglich) über die Zwischenstufen (II), (III) und (IV) auf dem skizzierten Weg.
ChemInform Abstract: FLUOROSTEROIDS. VII. SYNTHESIS AND BIOLOGICAL ACTIVITY OF 6α‐FLUORO‐16α,17α‐ISOPROPYLIDENEDIOXYPREGNA‐1,4‐DIENE‐11.BETA# .,21‐DIOL‐3,20‐DIONE DERIVATIVES.
Authors: RYZHKOVA V. M. , GUSAROVA T. I. , GRINENKO G. S. , GERASIMOVA M. L. , BYKOVA T. M. , KLUBNICHKINA G. A. , TEREKHINA A. I. , GRITSINA G. I. , KURGLOVA O. N. , ANTIPOVA L. A. 
Published: April 2016

AbstractDie Einführung der Al‐Doppelbindung in das Pregnenolon (I) zu (II) gelingt mit Hilfe von Selenigsäuredimethylester oder auf mikrobiellem Wege mittels Corynebacterium simplex.
Gyration and Permittivity of Ethylenediammonium Sulfate Crystals
Authors: Nichols Shane , Martin Alexander , Choi Joshua , Kahr Bart 
Published: April 2016

AbstractEthylenediammonium sulfate (EDS) crystals were grown from aqueous solution and cleaved into thin (100–500 micron) plates. The 422 point group of EDS was confirmed by X‐ray diffraction. The constitutive relations of EDS crystals were determined through generalized ellipsometry with an instrument that uses four photoelastic modulators (4PEM). The optical rotation at 500 nm, for example, was + 22.9°/mm along the optic axis and − 12.1°/mm perpendicular to the optic axis for the P41212 crystals. Enantiomorphous twins frequently form across the (001) plane. Mirrored halves must be separated by cleavage in advance of optical measurements. Chirality 28:460–465, 2016. © 2016 Wiley Periodicals, Inc.
Verbesserung von Kunstharzbeschichtungen durch Nanopartikel mit maßgeschneiderter Oberflächenmodifizierung
Authors: Kockmann Alexander , Hesselbach Jutta , Schilde Carsten , Kwade Arno , Garnweitner Georg 
Published: April 2016

AbstractPolymere Nanokomposite erfahren heutzutage zunehmende Bedeutung für die Erzeugung funktioneller Beschichtungen. Zu diesem Zweck werden maßgeschneiderte modifizierte Nanopartikel in eine Harzmatrix eingebracht und die Eigenschaften einer so erzeugten Beschichtung wesentlich verbessert. In dieser Arbeit wird der Zusammenhang der gesamten Prozesskette, von der Synthese bis zur Charakterisierung der Schichten, mit besonderem Blick auf die partikuläre Oberflächenchemie untersucht. Auf diese Weise kann dieser Einfluss aus einer Hand überprüft und Randeffekte weitgehend vermieden werden.
Increased MMP‐7 expression in biliary epithelium and serum underpins native liver fibrosis after successful portoenterostomy in biliary atresia
Authors: Kerola Anna , Lampela Hanna , Lohi Jouko , Heikkilä Päivi , Mutanen Annika , Hagström Jaana , Tervahartiala Taina , Sorsa Timo , Haglund Caj , Jalanko Hannu , Pakarinen Mikko P. 
Published: April 2016

AbstractThe molecular mechanisms underlying progressive liver fibrosis following surgical treatment of biliary atresia (BA) remain unclear. Our aim was to address hepatic gene and protein expression and serum levels of matrix metalloproteinases (MMPs) and their tissue inhibitors (TIMPs) after successful portoenterostomy (PE), and relate them to histological signs of liver injury, clinical follow‐up data and biochemical markers of hepatic function. LIver biopsies and serum samples were obtained from 25 children after successful PE at median age of 3.3 years. Serum MMP concentrations were determined by enzyme‐linked immune sorbent assay. Hepatic gene expression of MMPs and TIMPs was analyzed using real‐time reverse‐transcription PCR. Liver expression of MMP‐7 and cytokeratin‐7 was studied using immunohistochemistry. Despite effective clearance of biochemical and histological cholestasis following PE, BA patients showed increased hepatic gene expression of MMP‐7 (29‐fold, p < 0.001), MMP‐2 (3.1‐fold, p < 0.001), MMP‐14 (1.7‐fold, p = 0.007), and TIMP‐1 (1.8‐fold, p < 0.001), when compared to controls. Similar to a biliary epithelial marker cytokeratin‐7, expression of MMP‐7 localized in biliary epithelium of bile ducts and ductal proliferations and periportal hepatocytes and was increased (p < 0.001) in relation to controls. BA patients had 6‐fold higher serum levels of MMP‐7 (p < 0.001), which correlated positively with hepatic MMP‐7 gene (r = 0.548, p = 0.007) and protein (r = 0.532, p = 0.007) expression. Patients showed a positive correlation between biliary MMP‐7 expression and Metavir fibrosis stage (r = 0.605, p = 0.001) and portal fibrosis grade (r = 0.606, p = 0.001). Neither similarly increased MMP‐7 expression nor correlation with liver fibrosis was observed in patients with intestinal failure‐associated liver disease and comparable Metavir stage. In conclusion, our findings support an unique role of altered hepatic expression of MMP‐7 in the progression of liver fibrosis after successful PE and introduce a potential therapeutic target to pharmacologically extend native liver survival by inhibiting MMP‐7 hyperactivity. Serum MMP‐7 may be a valuable postoperative prognostic tool in BA.
A new device color gamut boundary description algorithm based on irregular segmentation
Authors: Yin Zhang , Yongwen Jiang , Maohai Lin 
Published: April 2016

AbstractThe description of device color gamut is very important for color gamut mapping, which plays an important role in cross‐media color reproduction. To get a more accurate color gamut boundary, several gamut boundary description (GBD) methods have been presented in the past; however, many problems still exist in the current algorithm (e.g., accuracy and speed). In this study, we propose a new device GBD method based on irregular segmentation and evaluate it against other GBD algorithms. In the irregular segmentation method, the device color gamut is divided into the high‐chroma and the low‐chroma color parts, and the high‐chroma parts are divided into more segments through the CIELAB a*b* plane when calculating color gamut descriptors. After that, in each segment, the radii between the color points and the center point are calculated. For the color points located in the high‐chroma parts, the color point with the biggest radius is selected as the gamut boundary descriptor, and for that in the low‐chroma parts, if the corresponding outer segments are empty, the color point with the biggest radius is selected as the gamut boundary descriptor. Then, the gamut boundary descriptors are visualized in CIELAB color space using triangulation method. Finally, the irregular segmentation method is evaluated in contrast with other GBD methods using gamut mismatch index. The results show that the irregular segmentation method performs better in accuracy and has smaller variance. © 2016 Wiley Periodicals, Inc. Col Res Appl, 42, 173–181, 2017
Diastereoselective Three‐Component Cascade Reaction to Construct Oxindole‐Fused Spirotetrahydro­furochroman Scaffolds for Drug Discovery
Authors: Qiu Lin , Wang Dongwei , Lei Yubing , Gao Lixin , Liu Shunying , Li Jia , Hu Wenhao 
Published: April 2016

AbstractA one‐pot synthesis of new oxindole‐fused polycyclic scaffolds is reported. The process involves a three‐component [3+2] cycloaddition followed by cyclization through an intramolecular Michael addition. The reaction gives easy access to oxindole‐fused spirotetrahydrofurochromans in moderate to good yields with high regio‐ and diastereoselectivity. These compounds could be useful for for drug discovery. Further modification was achieved by reduction of the nitro group, and intramolecular amide formation to give the corresponding lactams. The resulting heterocyclic products show good inhibitory activity against the enzyme PTP1B in vitro.
Baylis–Hillman Acetates in Synthesis: Copper(I)/tert‐Butyl Hydroperoxide Promoted One‐Pot Oxidative Intramolecular Cyclization Protocol for the Preparation of Pyrrole‐Fused Compounds and the Formal Synthesis of (±)‐Crispine A
Authors: Basavaiah Deevi , Lingaiah Balthu , Reddy Guddeti Chandrashekar , Sahu Bharat Chandra 
Published: April 2016

AbstractA convenient one‐pot protocol for the synthesis of benzo‐fused and indole‐fused indolizines from Baylis–Hillman acetates was developed. This strategy involves CuBr/tert‐butyl hydroperoxide promoted oxidation, intramolecular cyclization, and aromatization as key steps. The efficacy of this methodology was demonstrated by the formal synthesis of (±)‐crispine A, a biologically active molecule.
Commercial Copper Foam as an Effective 3D Porous Electrode for Nonenzymatic Glucose Detection
Authors: Bie Lili , Luo Xue , Kang Luqi , He Daiping , Jiang Ping 
Published: April 2016

AbstractCommercially available copper foam (CF) was used as a 3D porous electrochemical sensing platform for nonenzymatic glucose detection. CF shows high electrocatalytic activity towards glucose oxidation and can be used directly for glucose electrochemical sensing without any pretreatment. The sensor exhibits high performance towards glucose in 0.1 M NaOH solution with the linear range from 1 μM to 0.5 mM, the sensitivity of 5.85 mA mM−1 cm−2 and the detection limit of 0.5 μM (S/N=3) simultaneously. Furthermore, the sensor shows a high selectivity for glucose against the common interferences and good reliability for glucose detection in human serum samples.
Structural collapse correlative analysis using phenomenological fiber hinge elements to simulate two‐directional column deteriorations
Authors: Kasai Kazuhiko , Nam Tran‐Tuan , Maison Bruce F. 
Published: April 2016

SummaryThis paper presents three‐dimensional nonlinear dynamic analyses of a full‐scale four‐story steel building tested to collapse in 2007 at the E‐Defense shake‐table facility in Japan, using strong ground motion. Local buckling and consequent strength deterioration of all six columns at the first‐story level were observed as the main reason for the building collapse. Fiber hinge element that consists of fibers discretizing the column cross section is used model each end of the column. It has zero length but considers finite yield‐zone length for the fiber to simulate elastoplastic behavior and local buckling. Other parts of the building are modeled by standard column, beam, truss, and spring elements. Despite the unavoidable limitation of the parameters defining the fiber hinge element's properties that are empirically determined from the behavior of the cantilever column tested using an identical steel member, the analysis using the element appears to simulate well the column behavior because of the axial load and biaxial bending moment whose relative magnitudes differ considerably because of the locations. The analysis results indicate different deterioration patterns of the columns and effects of complex loading such as compression and tensile axial load applied alternately, additional high frequency axial load caused by vertical accelerations, and shifting of the principal directions of the bending moments cycle by cycle. Responses such as story drift, accelerations, base shear, and energy dissipation are also simulated well, and progress of local deterioration in the first‐story columns and global soft‐story mechanism is clarified by the analysis. Copyright © 2016 John Wiley & Sons, Ltd.
Advanced CFD Analysis of an Air‐cooled PEM Fuel Cell Stack Predicting the Loss of Performance with Time
Authors: Fink C. , Karpenko‐Jereb L. , Ashton S. 
Published: April 2016

AbstractThe PEM fuel cell simulation package developed by AVL List GmbH is coupled with a semi‐empirical degradation model describing the dependency of material parameters on operating conditions. The CFD model calculates the 3D distributions of electronic/ionic potentials, velocity, pressure, phase volume fractions, gas species mass fractions, and temperature in all solids and fluids of PEM fuel cell stacks, as well as water concentration and hydraulic pressure in the membrane. The degradation model modifies membrane and catalyst layer parameters according to local operating conditions and given operating time during the simulation run‐time. Calculated distributions of current density and temperature are compared to experimental data of an air‐cooled PEM fuel cell stack obtained with segmented measurement plates. For the validation of the degradation model, calculated current density decay vs. operating time are compared to through‐life polarization measurements. The good agreement between measurement and simulation demonstrates the ability of the model to predict the complex physical phenomena taking place in PEM fuel cells with high accuracy.
Cenozoic positive inversion tectonics and its migration in the East China Sea Shelf Basin
Authors: Zhang Guohua , Li Sanzhong , Suo Yanhui , Zhang Jianpei 
Published: April 2016

AbstractBased on detailed analysis of the inversion tectonics in each of the secondary tectonic units of the East China Sea Shelf Basin (ECSSB), this paper suggests that the Cenozoic positive inversion tectonics in the basin are typically anticlines of various shapes associated with thrusts. Four stages of tectonic inversions are recognized in the basin related to the Oujiang Movement (T80), the Yuquan Movement (T30), the Huagang Movement (T20) and the Longjing Movement (T12), and these four inversion stages are temporally and spatially distinct. Temporally, the tectonic inversion in the West Depression Group tended to weaken, relatively, from the Oujiang Movement (T80) to the Huagang Movement (T20), while the Longjing Movement (T12) does not show an obvious inversion signature. Spatially, the Longjing Movement tectonic inversion in the Xihu and Diaobei sags of the East Depression Group shows a pronounced reduction in intensity from north to south. The tectonic inversion in the East Depression Group tended to intensify, relatively, from the Yuquan Movement (T30), through the Huagang Movement (T20) to the Longjing Movement (T12). The intensity distribution, migration and evolution of Cenozoic inversions in the ECSSB are local responses to the synthetic effect of the convergence and subduction rates, and direction changes between the Pacific and Eurasian plates and/or between the Indian and Eurasian plates. In particular, the eastward migration of positive inversion tectonics in the ECSSB is closely and successively related to the formation of the East Depression Group and the opening of the Okinawa Trough. Copyright © 2016 John Wiley & Sons, Ltd.
LSD alters eyes‐closed functional connectivity within the early visual cortex in a retinotopic fashion
Authors: Roseman Leor , Sereno Martin I. , Leech Robert , Kaelen Mendel , Orban Csaba , McGonigle John , Feilding Amanda , Nutt David J. , Carhart‐Harris Robin L. 
Published: April 2016

AbstractThe question of how spatially organized activity in the visual cortex behaves during eyes‐closed, lysergic acid diethylamide (LSD)‐induced “psychedelic imagery” (e.g., visions of geometric patterns and more complex phenomena) has never been empirically addressed, although it has been proposed that under psychedelics, with eyes‐closed, the brain may function “as if” there is visual input when there is none. In this work, resting‐state functional connectivity (RSFC) data was analyzed from 10 healthy subjects under the influence of LSD and, separately, placebo. It was suspected that eyes‐closed psychedelic imagery might involve transient local retinotopic activation, of the sort typically associated with visual stimulation. To test this, it was hypothesized that, under LSD, patches of the visual cortex with congruent retinotopic representations would show greater RSFC than incongruent patches. Using a retinotopic localizer performed during a nondrug baseline condition, nonadjacent patches of V1 and V3 that represent the vertical or the horizontal meridians of the visual field were identified. Subsequently, RSFC between V1 and V3 was measured with respect to these a priori identified patches. Consistent with our prior hypothesis, the difference between RSFC of patches with congruent retinotopic specificity (horizontal–horizontal and vertical–vertical) and those with incongruent specificity (horizontal–vertical and vertical–horizontal) increased significantly under LSD relative to placebo, suggesting that activity within the visual cortex becomes more dependent on its intrinsic retinotopic organization in the drug condition. This result may indicate that under LSD, with eyes‐closed, the early visual system behaves as if it were seeing spatially localized visual inputs. Hum Brain Mapp 37:3031–3040, 2016. © 2016 Wiley Periodicals, Inc.
Neural correlates of spatial and nonspatial attention determined using intracranial electroencephalographic signals in humans
Authors: Park Ga Young , Kim Taekyung , Park Jinsick , Lee Eun Mi , Ryu Han Uk , Kim Sun I. , Kim In Young , Kang Joong Koo , Jang Dong Pyo , Husain Masud 
Published: April 2016

AbstractFew studies have directly compared the neural correlates of spatial attention (i.e., attention to a particular location) and nonspatial attention (i.e., attention to a feature in the visual scene) using well‐controlled tasks. Here, we investigated the neural correlates of spatial and nonspatial attention in humans using intracranial electroencephalography. The topography and number of electrodes showing significant event‐related desynchronization (ERD) or event‐related synchronization (ERS) in different frequency bands were studied in 13 epileptic patients. Performance was not significantly different between the two conditions. In both conditions, ERD in the low‐frequency bands and ERS in the high‐frequency bands were present bilaterally in the parietal cortex (prominently on the right hemisphere) and frontal regions. In addition to these common changes, spatial attention involved right‐lateralized activity that was maximal in the right superior parietal lobule (SPL), whereas nonspatial attention involved wider brain networks including the bilateral parietal, frontal, and temporal regions, but still had maximal activity in the right parietal lobe. Within the parietal lobe, spatial attention involved ERD or ERS in the right SPL, whereas nonspatial attention involved ERD or ERS in the right inferior parietal lobule. These findings reveal that common as well as different brain networks are engaged in spatial and nonspatial attention. Hum Brain Mapp 37:3041–3054, 2016. © 2016 The Authors Human Brain Mapping Published by Wiley Periodicals, Inc.
Identification of extreme events using drought indices and their impact on the Danube lower basin discharge
Authors: Mares Constantin , Mares Ileana , Mihailescu Mihaela 
Published: April 2016

AbstractIn this study extreme droughts and extremely wet periods in the Danube upper and middle basin (DUMB) have been highlighted with specific indices. The most widely used indices have been considered to estimate both the dry and wet phenomena severity and the frequency or spatio‐temporal extension. The climatic condition of 15 meteorological stations situated in the Danube basin has been evaluated using four indices: Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), Weighted PDSI (WPLM) and Palmer Z‐index (ZIND). The four indices have been analysed separately for each of the four seasons between 1901 and 2000. First the internal structure of the time series of the four indices has been analysed separately. Then the overall temporal characteristic has been analysed by means of the principal component of the Multivariate Empirical Orthogonal Functions decomposition of the four indices (PC1‐MEOF). For the discharge in the Danube lower basin, station Orsova has been chosen, representing an integrator of the discharges from the DUMB. A very close connection has been found between Palmer indices and Danube discharge in all seasons (with correlation coefficients greater then 0.80) excepting the spring season. A classification in five classes of both the four indices separately and the PC1‐MEOF has been achieved in order to highlight extreme events. The impact of phenomena quantified by Palmer indices in DUMB upon discharges in Danube lower basin is evident. It was demonstrated in this study that the Greenland‐Balkan Oscillation (GBO) influences the south‐east European hydro‐climatic regime more than the North Atlantic Oscillation (NAO) Index. Copyright © 2016 John Wiley & Sons, Ltd.