bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Impact of Absolute Importance and Processing Overlaps on Prospective Memory Performance
Authors: Walter Stefan , Meier Beat 
Published: September 2015

SummaryProspective memory is the ability to remember an intention at an appropriate moment in the future. Prospective memory tasks can be more or less important. Previously, importance was manipulated by emphasizing the importance of the prospective memory task relative to the ongoing task it was embedded in. This resulted in better prospective memory performance but also ongoing task costs. In the present study, we simply instructed one group of participants that the prospective memory task was important (i.e., absolute importance instruction) and compared them with a group with relative importance instructions and a control group. The results showed that absolute importance leads to an increase in prospective memory performance without enhancing ongoing task costs, whereas relative importance resulted in both increased prospective memory performance and ongoing task costs. Thus, prospective memory can be enhanced without ongoing task costs, which is particularly crucial for safety‐work contexts. Copyright © 2015 John Wiley & Sons, Ltd.
Recent Advances of α‐Isothiocyanato Compounds in the Catalytic Asymmetric Reaction
Authors: Han Wen‐Yong , Zhao Jian‐Qiang , Zuo Jian , Xu Xiao‐Ying , Zhang Xiao‐Mei , Yuan Wei‐Cheng 
Published: September 2015

Abstractα‐Isothiocyanato amides, esters and phosphonates have emerged as new types of versatile reagents for various organo‐ and metal‐catalyzed asymmetric cascade reactions, which have attracted increasing interest of many chemists. In this review, recent advances of α‐isothiocyanato compounds for the asymmetric cascade aldol/cyclization, Mannich/cyclization, Michael/cyclization, diverse [3+2] cyclization, and self‐cyclization/addition reactions are summarized and classified according to the types of acceptors.magnified image
Asymmetric Hydroazidation of Nitroalkenes Promoted by a Secondary Amine‐Thiourea Catalyst
Authors: Bellavista Tiziana , Meninno Sara , Lattanzi Alessandra , Della Sala Giorgio 
Published: September 2015

AbstractChiral β‐nitro azides are obtained by asymmetric addition of azides to nitroalkenes, with an enantioselectivity of up to 82% ee. The reaction, promoted by an easily accessible secondary amine‐thiourea catalyst, is performed with azidotrimethylsilane in the presence of benzoic acid. Products with different aliphatic β‐substituents are obtained in good yields and with the highest enantioselectivity reported to date. The presence of a secondary amine group was found to be crucial to achieve high stereocontrol.magnified image
Isolation and Characterization of Well‐Defined Silica‐Supported Azametallacyclopentane: A Key Intermediate in Catalytic Hydroaminoalkylation Reactions
Authors: Hamzaoui Bilel , Pelletier Jérémie D. A. , El Eter Mohamad , Chen Yin , Abou‐Hamad Edy , Basset Jean‐Marie 
Published: September 2015

AbstractIntermolecular catalytic hydroaminoalkylation of unactivated alkene occurs with silica‐supported azazirconacyclopropane [SiOZr(HNMe2)(η2‐NMeCH2)(NMe2)]. Mechanistic studies were conducted using surface organometallic chemistry (SOMC) concepts to identify the key surface intermediates. The azametallacyclopentene intermediate {SiOZr(HNMe2)[η2‐NMeCH2CH(Me)CH2](NMe2)} was isolated after treating with 1‐propylene and characterized by FT‐IR spectroscopy, elemental analysis, 1H 13C HETCOR, DARR SS‐NMR and DQ TQ SS‐NMR. The regeneration of the catalyst was conducted by dimethylamine protonolysis to yield the pure amine.magnified image
Organocatalytic Enantioselective Friedel–Crafts Alkylation of 1‐Naphthol Derivatives and Activated Phenols with Ethyl Trifluoropyruvate
Authors: Montesinos‐Magraner Marc , Vila Carlos , Blay Gonzalo , Fernández Isabel , Muñoz M. Carmen , Pedro José R. 
Published: September 2015

AbstractAn organocatalytic enantioselective Friedel–Crafts alkylation of a series of substituted 1‐naphthol derivatives and activated phenols with ethyl trifluoropyruvate, catalyzed by a quinine‐derived squaramide, is presented. Good yields and high to excellent enantioselectivities of the Friedel–Crafts alkylation products were obtained.magnified image
Women's facial attractiveness is related to their body mass index but not their salivary cortisol
Authors: Han Chengyang , Hahn Amanda C. , Fisher Claire I. , Debruine Lisa M. , Jones Benedict C. 
Published: September 2015

ObjectivesAlthough many theories of human facial attractiveness propose positive correlations between facial attractiveness and measures of actual health, evidence for such correlations is somewhat mixed. Here we sought to replicate a recent study reporting that women's facial attractiveness is independently related to both their adiposity and cortisol.MethodsNinety‐six women provided saliva samples, which were analyzed for cortisol level, and their height and weight, which were used to calculate their body mass index (BMI). A digital face image of each woman was also taken under standardized photographic conditions and rated for attractiveness.ResultsThere was a significant negative correlation between women's facial attractiveness and BMI. By contrast, salivary cortisol and facial attractiveness were not significantly correlated.ConclusionsOur results suggest that the types of health information reflected in women's faces include qualities that are indexed by BMI but do not necessarily include qualities that are indexed by cortisol. Am. J. Hum. Biol. 28:352–355, 2016. © 2015 Wiley Periodicals, Inc.
How does childhood socioeconomic hardship affect reproductive strategy? Pathways of development
Authors: Sheppard Paula , Pearce Mark S. , Sear Rebecca 
Published: September 2015

ObjectivesIn high‐income populations, evidence suggests that socioeconomic disadvantage early in life is correlated with reproductive strategy. Children growing up in unfavorable rearing environments tend to experience earlier sexual maturity and first births. Earlier first births may be associated with higher fertility, but links between socioeconomic disadvantage and larger family size have rarely been tested. The pathways through which early disadvantage influences reproduction are unknown. We test whether physiological factors link childhood adversity to age at first birth and total children.MethodsUsing data from the Newcastle Thousand Families Study, a 1947 British birth cohort, we developed path models to identify possible physiological traits linking childhood socioeconomic status, and poor housing standards, to two reproductive outcomes: age at first birth and total children. We explored birth weight, weight gain after birth, childhood illnesses, body mass index at age 9, age at menarche, and adult height as possible mediators.ResultsWe found direct, negative effects of socioeconomic status (SES) and housing on age at first birth, and of housing on fertility. Although we found links between childhood disadvantage and menarche and height, neither of these were significantly correlated with either reproductive outcome. Age at first birth completely mediates the relationship between childhood adversity and total fertility, which we believe has not been empirically demonstrated before.ConclusionsWhile there are some links between childhood adversity and child health, we find little evidence that physiological pathways, such as child health and growth, link early childhood adversity to reproductive outcomes in this relatively well‐nourished population. Am. J. Hum. Biol. 28:356–363, 2016. © 2015 The Authors American Journal of Human Biology Published by Wiley Periodicals, Inc.
Larger FVC and FEV1 among Tibetans compared to Han born and raised at high altitude
Authors: Weitz Charles A , Garruto Ralph M. , Chin Chen‐Ting 
Published: September 2015

ABSTRACTObjectivesThis study compares forced vital capacity (FVC) and Forced Expiratory Volume at 1 Second (FEV1) of Tibetans with those of Han who were born and raised at high altitude.Materials and MethodsFVC and FEV1 tests were conducted among 1,063 children and adolescents between the ages of 6 and 20 years, and 184 adults between the ages of 21 and 39 years who had lived their entire lives at 3200 m, 3800 m and 4300 m in Qinghai Provence, Peoples Republic of China.ResultsEven though FVC and FEV1 values of Han born and raised at high altitude are generally lower than those of Tibetans through age 15 in girls and age 16 in boys, differences are largely explained by variation in stature (height‐squared) and chest circumference. Among older adolescents and adults, the FVC and FEV1 values of Tibetans are significantly larger than those of Han born and raised at high altitude; and are much larger than would be predicted, based on stature and chest circumference.DiscussionThese results indicate that the large FVC and FEV1 values of Tibetan adults develop primarily from an accelerated pattern of lung growth that begins during mid‐to‐late adolescence and possibly extends into young adulthood. This developmental pattern is not only distinct from that of Han born and raised at high altitude, but also from those of Andean Quechua and Aymara. The pace of lung function growth may therefore represent another feature distinguishing the Tibetan from the Andean pattern of adaptation to high altitude hypoxia. Because of this, a search for features in the Tibetan genome related to this lung function growth phenotype might be productive and important. Am J Phys Anthropol 159:244–255, 2016. © 2015 Wiley Periodicals, Inc.
Reversible Calcium(II)‐Ion Binding through an Apparent pKa Shift of Thermosensitive Block‐Copolymer Micelles
Authors: Custers Johannes P. A. , van Nispen Sjoerd F. G. M. , Can Aydin , de La Rosa Victor R. , Maji Samarendra , Schubert Ulrich S. , Keurentjes Jos T. F. , Hoogenboom Richard 
Published: September 2015

AbstractThere is an increasing need for smart materials capable of removing multivalent ions from aqueous streams without the inconvenience of brine regeneration as in ion‐exchange processes. Herein, we present a thermoresponsive micellar system consisting of polystyrene–poly(methoxy diethyleneglycol acrylate) block copolymer surfactants modified with carboxylic acid end groups (PS‐PMDEGA‐COOH) that can be used to switch between the adsorption and desorption of divalent calcium(II) cations by a mild temperature trigger, thus providing a new type of thermoregenerable ion‐adsorbing materials. The switch of calcium(II)‐binding capacity is demonstrated to result from a shift in the pKa value of the carboxylic acid groups by the collapse and redissolution of the PMDEGA block and the associated change in local polarity.
A Flexible Photoactive Titanium Metal–Organic Framework Based on a [TiIV3(μ3‐O)(O)2(COO)6] Cluster
Authors: Bueken Bart , Vermoortele Frederik , Vanpoucke Danny E. P. , Reinsch Helge , Tsou Chih‐Chin , Valvekens Pieterjan , De Baerdemaeker Trees , Ameloot Rob , Kirschhock Christine E. A. , Van Speybroeck Veronique , Mayer James M. , De Vos Dirk 
Published: September 2015

AbstractThe synthesis of titanium–carboxylate metal–organic frameworks (MOFs) is hampered by the high reactivity of the commonly employed alkoxide precursors. Herein, we present an innovative approach to titanium‐based MOFs by the use of titanocene dichloride to synthesize COK‐69, the first breathing Ti MOF, which is built up from trans‐1,4‐cyclohexanedicarboxylate linkers and an unprecedented [TiIV3(μ3‐O)(O)2(COO)6] cluster. The photoactive properties of COK‐69 were investigated in depth by proton‐coupled electron‐transfer experiments, which revealed that up to one TiIV center per cluster can be photoreduced to TiIII while preserving the structural integrity of the framework. The electronic structure of COK‐69 was determined by molecular modeling, and a band gap of 3.77 eV was found.
Reactive Magnetospinning of Nano‐ and Microfibers
Authors: Tokarev Alexander , Trotsenko Oleksandr , Asheghali Darya , Griffiths Ian M. , Stone Howard A. , Minko Sergiy 
Published: September 2015

AbstractReactive spinning of nano‐ and microfibers that involves very fast chemical reactions and ion exchange is a challenge for the common methods for nanofiber formation. Herein, we introduce the reactive magnetospinning method. This procedure is based on the magnetic‐field‐directed collision of ferrofluid droplets with liquid droplets that contain complementary reactants. The collision, start of the chemical reaction, and the fiber drawing are self‐synchronized. The method is used to synthesize, cross‐link, and chemically modify fiber‐forming polymers in the stage of fiber formation. The method provides new opportunities for the fabrication of nanofibers for biomedical applications.
Enantioselective Construction of Spiroindolines with Three Contiguous Stereogenic Centers and Chiral Tryptamine Derivatives via Reactive Spiroindolenine Intermediates
Authors: Zhuo Chun‐Xiang , Zhou Yong , Cheng Qiang , Huang Lin , You Shu‐Li 
Published: September 2015

AbstractThe highly efficient synthesis of the enantioenriched spiroindolines by iridium‐catalyzed asymmetric allylic dearomatization and reduction is presented. Spiroindolines containing three contiguous stereogenic centers were obtained with excellent diastereo‐ and enantioselectivity. In addition, a chiral tryptamine derivative could be easily accessed in good yield with excellent ee value through an unprecedented dearomatization/retro‐Mannich/hydrolysis cascade reaction of an indole derivative.
Synthese von Komplexen mit anomalen “protischen” N‐heterocyclischen Carbenen
Authors: Jin Hanpeng , Tan Tristan Tsai Yuan , Hahn F. Ekkehardt 
Published: September 2015

AbstractNeutrales 4‐Iod‐N‐ethylimidazol (3) kann oxidativ an [Pt(PPh3)4] addiert werden, wobei in Gegenwart von Tetraalkylammoniumsalzen die Komplexe trans‐[4], trans‐[5] und trans‐[6] gebildet werden, die einen anionischen, am C4‐Atom gebundenen Heterocyclus mit einem unsubstituierten Ring‐Stickstoffatom enthalten. Der Komplex trans‐[4] reagiert mit der Protonenquelle NH4I unter Protonierung des Ring‐Stickstoffatoms und Bildung des Komplexes trans‐[7]I, der einen NH,NR‐substituierten aNHC‐Liganden trägt. Die Reaktion von trans‐[4] mit CH3I führt zum Komplex trans‐[8]I mit einem klassischen aNHC‐Liganden mit zwei alkylierten Ring‐Stickstoffatomen.
Aniline Dearomatization and Silver‐Catalyzed [3+3] Dipolar Cycloaddition: Efficient Construction of Oxocino[4,3,2‐cd]indoles from 2‐Alkynylanilines and 2‐Alkynylbenzaldoximes
Authors: Han Dandan , He Qiuqin , Fan Renhua 
Published: September 2015

Abstract2‐Alkynylanilines are attractive starting materials in indole synthesis because of their ready availability. Herein, a one‐pot stepwise procedure is reported for efficient construction of multisubstituted oxocino[4,3,2‐cd]indoles from 2‐alkynylanilines and 2‐alkynylbenzaldoximes. The method comprises the oxidative dearomatization of 2‐alkynylanilines, the silver‐catalyzed [3+3] cycloaddition with 2‐alkynylbenzaldoximes, and subsequent thermal radical skeletal rearrangement and aromatization.
Experimentelle und theoretische Untersuchung der Existenz von CuII, CuIII und CuIV in Kupfercorrolen
Authors: Sinha Woormileela , Sommer Michael G. , Deibel Naina , Ehret Fabian , Bauer Matthias , Sarkar Biprajit , Kar Sanjib 
Published: September 2015

AbstractDie üblichen Oxidationsstufen des Kupfers in stabilen Komplexen sind +I und +II. CuIII‐Komplexe werden oft als Zwischenstufen in der Bio‐ und Homogenkatalyse in Betracht gezogen. In letzter Zeit wurden CuIV‐Spezies als mögliche Intermediate in der Oxidationskatalyse postuliert. Trotz der Bedeutung der höheren Oxidationsstufen des Kupfers gibt es nur wenig spektroskopische Untersuchungen solcher Verbindungen, wobei für CuIV‐Komplexe keine derartigen Informationen vorliegen. Wir berichten hier über die Synthese und Charakterisierung dreier Kupfercorrole. Die Kombination von Elektrochemie, UV‐vis‐NIR/EPR Spektroelektrochemie, XANES Messungen und DFT‐Rechnungen weist auf drei definierte Redoxzustände dieser Moleküle hin, mit Kupfer in den Oxidationsstufen +II, +III und +IV. Die vorliegenden Ergebnisse sind die erste spektroskopische und theoretische Untersuchung einer CuIV‐Verbindung und beschreiben eine Redoxserie, bei der CuII, CuIII und CuIV in derselben molekularen Umgebung diskutiert werden.
Versatile and Efficient Site‐Specific Protein Functionalization by Tubulin Tyrosine Ligase
Authors: Schumacher Dominik , Helma Jonas , Mann Florian A. , Pichler Garwin , Natale Francesco , Krause Eberhard , Cardoso M. Cristina , Hackenberger Christian P. R. , Leonhardt Heinrich 
Published: September 2015

AbstractA novel chemoenzymatic approach for simple and fast site‐specific protein labeling is reported. Recombinant tubulin tyrosine ligase (TTL) was repurposed to attach various unnatural tyrosine derivatives as small bioorthogonal handles to proteins containing a short tubulin‐derived recognition sequence (Tub‐tag). This novel strategy enables a broad range of high‐yielding and fast chemoselective C‐terminal protein modifications on isolated proteins or in cell lysates for applications in biochemistry, cell biology, and beyond, as demonstrated by the site‐specific labeling of nanobodies, GFP, and ubiquitin.
A Bioinspired Molybdenum Complex as a Catalyst for the Photo‐ and Electroreduction of Protons
Authors: Porcher Jean‐Philippe , Fogeron Thibault , Gomez‐Mingot Maria , Derat Etienne , Chamoreau Lise‐Marie , Li Yun , Fontecave Marc 
Published: September 2015

AbstractA molybdenum–dithiolene–oxo complex was prepared as a model of some active sites of Mo/W‐dependent enzymes. The ligand, a quinoxaline–pyran‐fused dithiolene, mimics molybdopterin present in these active sites. For the first time, this type of complex was shown to be active as a catalyst for the photoreduction of protons with excellent turnover numbers (500) and good stability in aqueous/organic media and for the electroreduction of protons in acetonitrile with remarkable rate constants (1030 s−1 at −1.3 V versus Ag/AgCl). DFT calculations provided insight into the catalytic cycle of the reaction, suggesting that the oxo ligand plays a key role in proton exchange. These results provide a basis to optimize this new class of H2‐evolving catalysts.
Comparative Catalytic Activity of Group 9 [Cp*MIII] Complexes: Cobalt‐Catalyzed CH Amidation of Arenes with Dioxazolones as Amidating Reagents
Authors: Park Juhyeon , Chang Sukbok 
Published: September 2015

AbstractA procedure for the [Cp*CoIII]‐catalyzed direct CH amidation of arenes with dioxazolone has been developed. This reaction proceeds under straightforward and mild conditions with a broad range of substrates, including anilides. A comparative study on the catalytic activity of Group 9 [{Cp*MCl2}2] complexes revealed the unique efficiency of the cobalt catalyst.
The Hairpin Furans: Easily Prepared Hybrids of Helicenes and Twisted Acenes
Authors: Geng Xin , Donahue James P. , Mague Joel T. , Pascal Robert A. 
Published: September 2015

AbstractThe thermal reaction of a cyclopentadienone with 6,6′‐dimethoxy‐5,5′‐binaphthoquinone gives, in a single step, a molecular ribbon consisting of two twisted aromatic systems fused to a heteropentahelicene. Such molecules constitute a new class of chiral polycyclic aromatic compounds, the “hairpin furans”.
Enantioselective Synthesis of Spiroindenes by Enol‐Directed Rhodium(III)‐Catalyzed CH Functionalization and Spiroannulation
Authors: Reddy Chidipudi Suresh , Burns David J. , Khan Imtiaz , Lam Hon Wai 
Published: September 2015

AbstractChiral cyclopentadienyl rhodium complexes promote highly enantioselective enol‐directed C(sp2)‐H functionalization and oxidative annulation with alkynes to give spiroindenes containing all‐carbon quaternary stereocenters. High selectivity between two possible directing groups, as well as control of the direction of rotation in the isomerization of an O‐bound rhodium enolate into the C‐bound isomer, appear to be critical for high enantiomeric excesses.
Rhodium(III)‐Catalyzed ortho‐Heteroarylation of Phenols through Internal Oxidative CH Activation: Rapid Screening of Single‐Molecular White‐Light‐Emitting Materials
Authors: Li Bijin , Lan Jingbo , Wu Di , You Jingsong 
Published: September 2015

AbstractReported herein is the first example of a transition‐metal‐catalyzed internal oxidative CH/CH cross‐coupling between two (hetero)arenes through a traceless oxidation directing strategy. Without the requirement of an external metal oxidant, a wide range of phenols, including phenol‐containing natural products, can undergo the coupling with azoles to assemble a large library of highly functionalized 2‐(2‐hydroxyphenyl)azoles. The route provides an opportunity to rapidly screen white‐light‐emitting materials. As illustrative examples, two bis(triphenylamine)‐bearing 2‐(2‐hydroxyphenyl)oxazoles, which are difficult to access otherwise, exhibit bright white‐light emission, high quantum yield, and thermal stability. Also presented is the first example of the white‐light emission, in a single excited‐state intramolecular proton transfer system, of 2‐(2‐hydroxyphenyl)azoles, thus highlighting the charm of CH activation in the discovery of new organic optoelectronic materials.
Bonding performance and fracture morphology of a hybrid multiscale epoxy adhesive on oil‐covered substrates
Authors: Zhang Zhongwei , Tan Yefa , Wang Xiaolong , Tan Hua , Hong Xiang 
Published: September 2015

ABSTRACTA hybrid multiscale epoxy adhesive reinforced with a combination of short carbon fibers and rubber nanoparticles was prepared for bonding oil‐covered aluminum substrates. The shear performance of the bonded joints was investigated as a function of the oil layer thickness. Scanning electron microscopy and energy‐dispersive X‐ray analysis studies were carried out to evaluate the oil‐diffusion behavior near the substrate–adhesive interface. The results show that the shear strength decreased, whereas the distribution range of the testing results increased as the oil layer thickness increased. When the oil layer was thinner than 10 μm, the oil‐accommodating adhesive could be used directly without degreasing, whereas over 96% of the bonding strength could be retained with almost no change in the failure probability. The analysis of Weibull distribution indicated that the shear strength and Weibull modulus were 18.89 MPa and 13.503, respectively. By analyzing the relationship between the shear strength results and the failure model of the fracture surface, we found a correlation. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 42898.
Preparation and properties of octadecylamine modified graphene oxide/styrene‐butadiene rubber composites through an improved melt compounding method
Authors: Wang Chunwei , Liu Zijin , Wang Shifeng , Zhang Yong 
Published: September 2015

ABSTRACTOctadecylamine modified graphene oxide/styrene‐butadiene rubber (GO‐ODA/SBR) composites are prepared by a novel and environmental‐friendly method called “Improved melt compounding”. A GO‐ODA/ethanol paste mixture is prepared firstly, and then blended with SBR by melt compounding. GO‐ODA sheets are uniformly dispersed in SBR as confirmed by scanning electron microscope, transmission electron microscopy, and X‐ray diffraction. The interfacial interaction between GO‐ODA and SBR is weaker than that between GO and SBR, which is proved by equilibrium swelling test and dynamic mechanical analysis. GO‐ODA/SBR show more pronounced “Payne effect” than GO/SBR composites, indicating enhanced filler networks resulted from the modification of GO with ODA. GO‐ODA/SBR composite has higher tensile strength and elongation at break than SBR and GO/SBR composite. The tensile strength and elongation at break for the composite with 5 parts GO‐ODA per hundred parts of rubber increase by 208% and 172% versus neat SBR, respectively. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2016,133, 42907.