bluuebunny/crossref_metadata_2025_split huggingface dataset:
Grundlagen für materialeffizientes Planen und Bauen
Authors: Ortlepp Regine , Gruhler Karin , Schiller Georg , Ortlepp Sebastian 
Published: September 2016

AbstractDer Bausektor verbraucht große Mengen an natürlichen Ressourcen und erzeugt hohe Mengen an Bau‐ und Abbruchabfällen. Es ist allerdings abzusehen, dass sich Veränderungen in der politischen Rahmensetzung auch zukünftig auf das Bauwesen auswirken werden. Die Bundespolitik fokussiert auf eine verstärkte Kreislaufführung insbesondere ressourcenrelevanter Mengenabfälle, zu denen vor allem die mineralischen Stoffe gehören. Die bundeseinheitliche Harmonisierung des Wasser‐, Bodenschutz‐ und Abfallrechts wird dazu führen, dass die heute üblichen Verwertungsmöglichkeiten als mineralische Ersatzbaustoffe in technischen Bauwerken oder bei der Verfüllung (sog. Downcycling) eingeschränkt werden. Um ein in Zukunft hochwertiges Recycling zu ermöglichen, stellt sich unter anderem die Frage, welche Mengen an Materialien aus den vorhandenen Bauwerksbeständen diesem Prozess zugeführt werden können. Eine Basis für die systematische und wirtschaftliche Nutzung von Ersatzbaustoffen bildet dabei das Wissen über die Menge und Verteilung der Baustoffe, da der erreichbare Verwendungsgrad neben bautechnischen Anforderungen an die Bauprodukte auch von der Verfügbarkeit entsprechender Rezyklatmengen im Verhältnis zum allgemeinen Bedarf an Baustoffen abhängt.Der vorliegende Artikel richtet sich thematisch an die Fachverbände der Baustoffhersteller, Planer sowie weitere für Ausschreibungen verantwortliche Personen. Er soll Einblicke in den vorhandenen Bauwerksbestand geben und dabei helfen, zukünftige Entwicklungstendenzen hinsichtlich der Verfügbarkeit sowie des Bedarfs an hochwertigen Ersatzbaustoffen einzuschätzen. Am Beispiel der Nichtwohngebäude (NWG) in Deutschland wird ein Verfahren vorgestellt, Materialbestände zu quantifizieren. Der Quantifizierungsprozess der Baustoffzusammensetzung erfolgt dabei in drei Schritten:

Ermittlung der Gesamtnutzfläche für Deutschland und Aufteilung nach Gebäudetypen;
Berechnung der Materialkoeffizienten (MKZ) in Bezug auf verschiedene Gebäudetypen;
Bestimmung des gesamten Materialbestands und dessen jährlicher Veränderungen.

Die wichtigsten Ergebnisse sind Nutzflächen und MKZ für die in der Bautätigkeitsstatistik ausgewiesenen unterschiedlichen NWG‐Arten sowie die Materialmasse des deutschen NWG‐Bestands insgesamt. Die Gesamtmaterialmasse von NWG in Deutschland beträgt ca. 6,8 Mrd. t. Dies entspricht 44 % des gesamten Gebäudebestands. Durch Abriss‐ und Sanierungsmaßnahmen verlassen diesen Bauwerksbestand jährlich ca. 38 Mio. t mineralische Materialien, für welche entsprechende ökologisch und ökonomisch tragbare Verwertungswege zur Verfügung stehen müssen.
Langzeiterfahrungen an einer Gabionenkonstruktion
Authors: Lehmann Jens , Fischer Joachim , Burkert Andreas , Mietz Jürgen 
Published: September 2016

AbstractAnhand der hier vorliegenden Untersuchungsergebnisse kann eine umfassende Einschätzung des Korrosionszustands einer Gabionenkonstruktion aus Drähten mit Zink‐Aluminium‐Überzug nach 20 Jahren Einsatzzeit in Abhängigkeit von unterschiedlichen Expositionsbedingungen einzelner Bereiche vorgenommen werden. Die festgestellten Massenverluste der Zink‐Aluminium‐Überzüge waren an den Untersuchungspositionen, insbesondere hinsichtlich der verschiedenen Expositionsbedingungen der Probenentnahmestellen, unterschiedlich ausgeprägt. Gabionendrähte, die im direkten Bodenkontakt standen, wiesen dabei die geringsten Restauflagen auf. Atmosphärisch beanspruchte sowie durch Vlies vor direktem Bodenkontakt geschützte Gabionendrähte zeigten dagegen etwas größere Restauflagen. Über den Drahtumfang wurden bei allen untersuchten Gabionendrahtproben stark variierende Schichtdicken festgestellt, was offensichtlich herstellungsbedingte Ursachen hatte. Die Untersuchungen an der Gabionenkonstruktion haben gezeigt, dass die Annahme einer mittleren linearen Abtragsrate des metallischen Überzugs von 1 μm/a unter den hier untersuchten Bedingungen ein realistischer Wert ist. An örtlichen Positionen bei direktem Bodenkontakt kann dieser Wert aber deutlich größer werden, sobald sich die Aggressivität des Bodens erhöht. Eine Rotrostbildung war an den Drahtproben nicht feststellbar.
Activity in primary motor cortex during action observation covaries with subsequent behavioral changes in execution
Authors: Aridan Nadav , Mukamel Roy 
Published: September 2016

AbstractIntroductionObserving someone else perform a movement facilitates motor planning, execution, and motor memory formation. Rate, an important feature in the execution of repeated movements, has been shown to vary following movement observation although the underlying neural mechanisms are unclear. In the current study, we examined how the rate of self‐paced index finger pressing is implicitly modified following passive observation of a similar action performed at a different rate.MethodsFifty subjects performed a finger pressing sequence with their right hand at their own pace before and after passive observation of either a 1‐min video depicting the task performed at 3 Hz by someone else or a black screen. An additional set of 15 subjects performed the task in an MRI scanner.ResultsAcross all 50 subjects, the spontaneous execution rate prior to video observation had a bimodal distribution with modes around 2 and 4 Hz. Following video observation, the slower subjects performed the task at an increased rate. In the 15 subjects who performed the task in the MRI scanner, we found positive correlation between fMRI signal in the left primary motor strip during passive video observation and subsequent behavioral changes in task performance rate.ConclusionWe conclude that observing someone else perform an action at a higher rate implicitly increases the spontaneous rate of execution, and that this implicit induction is mediated by activity in the contralateral primary motor cortex.
Possible mechanisms of Leukoagglutinin induced apoptosis in human cells in vitro
Authors: Kochubei Tetiana , Kitam Volodymyr , Maksymchuk Oksana , Piven Oksana , Lukash Lyubov 
Published: September 2016

AbstractLeukoagglutinin is one of the phytohemagglutinin isolectins isolated from Phaseolus vulgaris. In our recent study, we showed that this lectin is able to influence the growth of human cancer cells in vitro. In addition, using the acridine orange and ethidium bromide staining, we found that leukoagglutinin can induce apoptosis. In order to understand the molecular mechanisms of induction of apoptosis, we performed computational modeling with subsequent experimental verification of theoretical data in vitro. We developed computational models of leukoagglutinin interaction with pro‐ (FasR and TNFR) and anti‐apoptotic (IGF‐1 and EGFR) receptors, and confirmed that leukoagglutinin may specifically interact with these receptors. Furthermore, we proved that leukoagglutinin can induce apoptosis in cancer (HEp‐2) and non‐cancer (4BL) cells, and observed that PHA‐L is able to induce apoptosis through the up‐regulation of Bax protein and activation of the effector caspase‐3 and initiator caspase‐8. However, these proteins have no effect on the Bcl‐2 expression level.
Differential protein abundance of a basolateral MCT1 transporter in the human gastrointestinal tract
Authors: Al‐mosauwi Hashemeya , Ryan Elizabeth , McGrane Alison , Riveros‐Beltran Stefanie , Walpole Caragh , Dempsey Eugene , Courtney Danielle , Fearon Naomi , Winter Desmond , Baird Alan , Stewart Gavin 
Published: September 2016

AbstractBacterially derived short chain fatty acids (SCFAs), such as butyrate, are vital in maintaining the symbiotic relationship that exists between humans and their gastrointestinal microbial populations. A key step in this process is the transport of SCFAs across colonic epithelial cells via MCT1 transporters. This study investigated MCT1 protein abundance in various human intestinal tissues. Initial RT‐PCR analysis confirmed the expected MCT1 RNA expression pattern of colon > small intestine > stomach. Using surgical resection samples, immunoblot analysis detected higher abundance of a 45 kDa MCT1 protein in colonic tissue compared to ileum tissue (P < 0.001, N = 4, unpaired t‐test). Importantly, MCT1 abundance was found to be significantly lower in sigmoid colon compared to ascending colon (P < 0.01, N = 8–11, ANOVA). Finally, immunolocalization studies confirmed MCT1 to be abundant in the basolateral membranes of surface epithelial cells of the ascending, transverse, and descending colon, but significantly less prevalent in the sigmoid colon (P < 0.05, N = 5–21, ANOVA). In conclusion, these data confirm that basolateral MCT1 protein abundance is correlated to levels of bacterially derived SCFAs along the human gastrointestinal tract. These findings highlight the importance of precise tissue location in studies comparing colonic MCT1 abundance between normal and diseased states.
From Lignocellulosic Biomass to Furfural: Insight into the Active Species of a Silica‐Supported Tungsten Oxide Catalyst
Authors: Bhaumik Prasenjit , Dhepe Paresh Laxmikant 
Published: September 2016

AbstractA sol–gel‐synthesized silica‐supported tungsten oxide catalyst that has Lewis acidity was characterized and employed as a solid acid catalyst in the synthesis of furfural directly from lignocellulosic biomass (isolated xylans and crop wastes). In a one‐pot method, 71 % furfural formation from isolated xylan was possible using a water/toluene (1:2 v/v) biphasic solvent system at 170 °C after 10 h over 10 wt % WO3/SiO2. The WO3/SiO2 catalyst in the selective conversion of pentosan from crop wastes (bagasse, wheat straw, and rice husk) yielded 72–87 % furfural under the optimum reaction conditions. Additionally, the catalyst presented excellent recyclability in at least eight runs after simple water washing. From the catalyst characterization studies, it was suggested that silicotungstic‐type acid species are anchored on the WO3/SiO2 catalyst that help to achieve a good catalytic activity.
Bis(cyclopropenium)phosphines: Synthesis, Reactivity, and Applications
Authors: Mehler Gerlinde , Linowski Pawel , Carreras Javier , Zanardi Alessandro , Dube Jonathan W. , Alcarazo Manuel 
Published: September 2016

AbstractA straightforward route for the preparation of a set of bis(cyclopropenium)‐substituted phosphines is reported. Due to their dicationic nature, these ligands depict an excellent π‐acceptor character. The effect of the ligand substituent pattern on the catalytic activity of the metal complexes thereof derived is also studied. Whereas sterically demanding biaryl groups directly attached to the phosphorus atom seem to facilitate elementary steps such as the product release from the catalyst, long chain dialkylamino groups on the cyclopropenium units maximize the catalysts solubility and, thus, allow the use of typical apolar solvents such as toluene. Importantly, all new ligands prepared can be easily handled in air. Finally, the impact of the newly prepared dicationic phosphines in hydroarylation reactions is demonstrated. In particular, their use in the synthesis of several naphtho[1,2‐b]furanes and naturally occurring naphthalene derivatives such as Calanquinone C is reported.
How Does Solvation Affect the Binding of Hydrophilic Amino Saccharides to Cucurbit[7]uril with Exceptional Anomeric Selectivity?
Authors: Wang Jianping , Jang Yoonjung , Khedkar Jayshree K. , Koo Jin Young , Kim Yonghwi , Lee Chang Jun , Rhee Young Min , Kim Kimoon 
Published: September 2016

AbstractCucurbit[7]uril (CB[7]) is known to bind strongly to hydrophilic amino saccharide guests with exceptional α‐anomer selectivities under aqueous conditions. Single‐crystal X‐ray crystallography and computational methods were used to elucidate the reason behind this interesting phenomenon. The crystal structures of protonated galactosamine (GalN) and glucosamine (GluN) complexes confirm the inclusion of α anomers inside CB[7] and disclose the details of the host–guest binding. Whereas computed gas‐phase structures agree with these crystal structures, gas‐phase binding free energies show preferences for the β‐anomer complexes over their α counterparts, in striking contrast to the experimental results under aqueous conditions. However, when the solvation effect is considered, the binding structures drastically change and the preference for the α anomers is recovered. The α anomers also tend to bind more tightly and leave less space in the CB[7] cavity toward inclusion of only one water molecule, whereas loosely bound β anomers leave more space toward accommodating two water molecules, with markedly different hydrogen‐bonding natures. Surprisingly, entropy seems to contribute significantly to both anomeric discrimination and binding. This suggests that of all the driving factors for the strong complexation of the hydrophilic amino saccharide guests, water mediation plays a crucial role in the anomer discrimination.
Computational Study of the Stability of Nanotube Fragments
Authors: Fantini Beatrice , Faglioni Francesco 
Published: September 2016

AbstractExtremely short (<1 nm) fragments of zig‐zag carbon nanotubes are studied with ab‐initio techniques to determine their geometric and electronic structure as well as their magnetic susceptibility. It is found that for lengths of a few carbon–carbon bonds, each fragment can be viewed as composed of crowns, that is, zig‐zag rings of carbon atoms along the circumference of the tube. In this case, two kinds of electronic structures are found, depending on whether the number of carbon atoms in each crown is even or odd. Systems comprising three or more crowns either have a high spin ground state or involve a charge transfer across the length of the fragment. Conjugation changes qualitatively when the length of the fragment approaches and surpasses its girth. Indications regarding the predicted chemical stability and electronic response are provided and interpreted in terms of current densities induced within each crown by a magnetic field along the tube axis.
Factors Affecting the Performance of Champion Silyl‐Anchor Carbazole Dye Revealed in the Femtosecond to Second Studies of Complete ADEKA‐1 Sensitized Solar Cells
Authors: Sobuś Jan , Gierczyk Błażej , Burdziński Gotard , Jancelewicz Mariusz , Polanski Enrico , Hagfeldt Anders , Ziółek Marcin 
Published: September 2016

AbstractRecord laboratory efficiencies of dye‐sensitized solar cells have been recently reported using an alkoxysilyl‐anchor dye, ADEKA‐1 (over 14 %). In this work we use time‐resolved techniques to study the impact of key preparation factors (dye synthesis route, addition of co‐adsorbent, use of cobalt‐based electrolytes of different redox potential, creation of insulating Al2O3 layers and molecule capping passivation of the electrode) on the partial charge separation efficiencies in ADEKA‐1 solar cells. We have observed that unwanted fast recombination of electrons from titania to the dye, probably associated with the orientation of the dyes on the titania surface, plays a crucial role in the performance of the cells. This recombination, taking place on the sub‐ns and ns time scales, is suppressed in the optimized dye synthesis methods and upon addition of the co‐adsorbent. Capping treatment significantly reduces the charge recombination between titania and electrolyte, improving the electron lifetime from tens of ms to hundreds of ms, or even to single seconds. Similar increase in electron lifetime is observed for homogenous Al2O3 over‐layers on titania nanoparticles, however, in this case the total solar cells photocurrent is decreased due to smaller electron injection yield from the dye. Our studies should be important for a broader use of very promising silyl‐anchor dyes and the further optimization and development of dye‐sensitized solar cells.
ChemInform Abstract: Structural Insights into the Thermal Decomposition Sequence of Barium Tetrahydrogenorthotellurate(VI), Ba[H4TeO6].
Authors: Weil Matthias , Stoeger Berthold , Gierl‐Mayer Christian , Libowitzky Eugen 
Published: September 2016

AbstractSingle crystals of Ba[H4TeO6] (I), Ba[H2TeO5] (II), Ba[Te2O6(OH)2] (III), and Ba[TeO4] (IV) are prepared by a diffusion method (I), under hydrothermal conditions (II and III), and by solid state reaction (IV), respectively.
ChemInform Abstract: Ternary Perovskite Nickel Titanate/Reduced Graphene Oxide Nano‐Composite with Improved Lithium Storage Properties.
Authors: Li Meng , Fan Xiulin , Xiao Xuezhang , Huang Xu , Jiang Yiqun , Chen Lixin 
Published: September 2016

AbstractNiTiO3/reduced graphene oxide (RGO) composites with a particle size of 40—50 nm are prepared by solvothermal reaction of equimolar amounts of Ni(NO3)2 and Ti(OPr)4 in citric acid/EtOH (autoclave, 190 °C, 12 h) followed by calcination at 600 °C and heating of the as‐prepared powder in an EtOH suspension of GO (120 °C, 12 h).
ChemInform Abstract: Noncentrosymmetric Selenide Ba4Ga4GeSe12: Synthesis, Structure, and Optical Properties.
Authors: Yin Wenlong , Iyer Abishek K. , Li Chao , Lin Xinsong , Yao Jiyong , Mar Arthur 
Published: September 2016

AbstractBa4Ga4GeSe12 is prepared by solid state reaction of a 4:2:1 molar mixture of BaSe, Ga2Se3, and GeSe2 (evacuated silica tubes, 1173 K, 72 h).
ChemInform Abstract: Effect of Alkali Cations on Two‐Dimensional Networks of Two New Quaternary Thioarsenates (III) Prepared by a Facile Surfactant‐Thermal Method.
Authors: Yan Dongming , Hou Peipei , Liu Chang , Chai Wenxiang , Zheng Xuerong , Zhang Luodong , Zhi Mingjia , Zhou Chunmei , Liu Yi 
Published: September 2016

AbstractNaAg2AsS3·H2O (I) and KAg2AsS3 (II) are prepared by surfactant‐thermal (solvothermal) reaction of a 2:1:0.5:2 molar mixture of NaOH (KOH), Ag, As2S3, and S in N2H4·H2O (or en for (II)) and PEG‐400 (autoclave, 130 °C, 7 d, 95% and 98% yield of (I) and (II), resp.).
ChemInform Abstract: Mild and Selective Catalytic Hydrogenation of the C=C Bond in α,β‐Unsaturated Carbonyl Compounds Using Supported Palladium Nanoparticles.
Authors: Nagendiran Anuja , Pascanu Vlad , Bermejo Gomez Antonio , Gonzalez Miera Greco , Tai Cheuk‐Wai , Verho Oscar , Martin‐Matute Belen , Baeckvall Jan‐E. 
Published: September 2016

AbstractTwo catalysts consisting of palladium nanoparticles supported either on a siliceous mesocellular foam (PDC‐1) or on a metal‐organic framework (PDC‐2) are evaluated in the title reaction of some unsaturated substrates and compared with the results obtained from Pd‐C.
ChemInform Abstract: Palladium‐Catalyzed Difluoromethylthiolation of Heteroaryl Bromides, Iodides, Triflates and Aryl Iodides.
Authors: Wu Jiang , Liu Yafei , Lu Changhui , Shen Qilong 
Published: September 2016

AbstractThe reaction has a broad substrate scope, thus tolerating a diverse range of heteroaryl halides and triflates as well as variously functionalized aryl iodides.
ChemInform Abstract: Oxidative Nucleophilic Aromatic Amination of Nitrobenzenes.
Authors: Khutorianskyi V. V. , Sonawane M. , Posta M. , Klepetarova B. , Beier P. 
Published: September 2016

AbstractThe oxidative nucleophilic aromatic amination of nitrobenzenes (II) and (IV) with lithium salts of arylamines (I) leads to N‐aryl‐2‐nitroanilines.
ChemInform Abstract: A General Palladium‐Catalyzed Hiyama Cross‐Coupling Reaction of Aryl and Heteroaryl Chlorides.
Authors: Yuen On Ying , So Chau Ming , Man Ho Wing , Kwong Fuk Yee 
Published: September 2016

AbstractThe reaction can be run with low catalyst loadings (0.05‐1 mol%).
ChemInform Abstract: Chiral Phosphorus‐Olefin Ligands for the RhI‐Catalyzed Asymmetric Addition of Aryl Boronic Acids to Electron‐Deficient Olefins.
Authors: Chen Qian , Li Liang , Zhou Guangli , Ma Xiaoli , Zhang Lu , Guo Fang , Luo Yi , Xia Wujiong 
Published: September 2016

AbstractThe developed ligands allow for an efficient, highly enantioselective transformation of cyclic and acyclic α,β‐unsaturated carbonyl compounds according to the title reaction.
ChemInform Abstract: The Different Roles of a Cationic Gold(I) Complex in Catalysing Hydroarylation of Alkynes and Alkenes with a Heterocycle.
Authors: Mehrabi Tahmineh , Ariafard Alireza 
Published: September 2016

AbstractUsing DFT calculations, the mechanism of twofold hydroarylation of terminal alkynes with pyrrole catalyzed by a cationic gold(I) complex is investigated.
ChemInform Abstract: Potassium‐Exchanged Zirconium Hydrogen Phosphate [α‐Zr(KPO4)2]‐Catalyzed Synthesis of 2‐Amino‐4H‐pyran Derivatives under Solvent‐Free Conditions.
Authors: Rosati Ornelio , Pelosi Azzurra , Temperini Andrea , Pace Vittorio , Curini Massimo 
Published: September 2016

AbstractThe one‐pot three component reaction between dimedone derivatives, malonitrile or cyanoacetate and aryl, alkenyl or alkyl aldehydes provides the title products in generally high yields.
ChemInform Abstract: Oxadendralenes in Asymmetric Organocatalysis for the Construction of Tetrahydroisochromenes.
Authors: Hammer Niels , Leth Lars A. , Stiller Julian , Jensen Magnus E. , Joergensen Karl Anker 
Published: September 2016

AbstractStarting from oxadendralenic dienals and various aldehydes cyclic oxadendralenic intermediates are formed which further react in a one‐pot manner with vinyl ethers to form complex tetrahydroisochromenes with up to five stereogenic centers in high yields and with excellent diastereo‐ and enantioselectivities.
ChemInform Abstract: Evaluation of 5‐cis‐Substituted Prolinamines as Ligands in Enantioselective, Copper‐Catalyzed Henry Reactions.
Authors: Kaldun Johannes , Prause Felix , Scharnagel Dagmar , Freitag Frederik , Breuning Matthias 
Published: September 2016

AbstractThe newly synthesized ligands prove useful in the scalable Henry reaction of aromatic, hetaromatic and aliphatic aldehydes.
ChemInform Abstract: Rhodium‐Catalyzed Desymmetrization by Hydroformylation of Cyclopentenes: Synthesis of Chiral Carbocyclic Nucleosides.
Authors: You Cai , Wei Biao , Li Xiuxiu , Yang Yusheng , Liu Yue , Lv Hui , Zhang Xumu 
Published: September 2016

AbstractA Rh‐catalyzed desymmetric hydroformylation of 3‐substituted cyclopentenes constitutes an efficient approach to chiral cyclopentane carboxyaldehydes.
ChemInform Abstract: Amino Acid‐Promoted C—H Alkylation with Alkylboronic Acids Using a Removable Directing Group.
Authors: Zhang Yu , Jiang Hang , Chen Dushen , Zhang Yanghui 
Published: September 2016

AbstractPyridylsilyl‐directed C—H alkylation reaction with alkylboronic acids occurs in the presence of a palladium catalyst and an essential amino acid ligand.
ChemInform Abstract: Mild Metal‐Free Hydrosilylation of Secondary Amides to Amines.
Authors: Huang Pei‐Qiang , Lang Qi‐Wei , Wang Yan‐Rong 
Published: September 2016

AbstractIn situ activation of carboxylic amides with triflic anhydride and 2‐fluoropyridine allows the direct one‐pot reduction to the corresponding secondary amines with 1,1,3,3‐tetramethyldisiloxane and B(C6F5)3 as the catalyst.
ChemInform Abstract: Stereoselective Synthesis and Modelling‐Driven Optimization of Carane‐Based Aminodiols and 1,3‐Oxazines as Catalysts for the Enantioselective Addition of Diethylzinc to Benzaldehyde.
Authors: Szakonyi Zsolt , Csor Arpad , Csampai Antal , Fueloep Ferenc 
Published: September 2016

AbstractA library of title ligands (12 examples) is prepared starting from (S)‐(‐)‐perillaldehyde and tested in the reaction of aldehydes (III) with ZnEt2.
ChemInform Abstract: Highly Regioselective meta Arylation of Oxalyl Amide‐Protected β‐Arylethylamine via the Catellani Reaction.
Authors: Han Jian , Zhang Li , Zhu Yan , Zheng Yongxiang , Chen Xiaolan , Huang Zhi‐Bin , Shi Da‐Qing , Zhao Yingsheng 
Published: September 2016

AbstractAn approach to achieve the high site selective meta‐C—H arylation of β‐arylethylamine via palladium norbornene catalysis under assistance of a N,O bidentate directing group is developed.