bluuebunny/crossref_metadata_2025_split huggingface dataset:
Le bois de chauffage utilisé dans les campings de la Montérégie : un vecteur potentiel de propagation de l’agrile du frêne
Authors: Godmaire Hélène , Galvez Quentin 
Published: June 2013

L’agrile du frêne (Agrilus planipennis) est un insecte ravageur exotique qui s’attaque et tue toutes les espèces de frênes. Depuis sa détection à Carignan en Montérégie en 2008, la région fait l’objet de surveillance, car le potentiel destructeur de l’insecte est immense. Un des plus grands risques de dispersion de l’agrile du frêne réside dans le déplacement de produits infestés, en particulier du bois de chauffage. Dans le cadre de cette étude, nous nous sommes penchés sur les déplacements du bois de chauffage en Montérégie en interrogeant les commerçants de bois ainsi que les usagers et les propriétaires de camping. Le but de l’étude a été de documenter ces déplacements de bois de chauffage afin d’évaluer s’il existe réellement un risque et, dans l’affirmative, d’identifier des pistes de solution. L’enquête a révélé qu’il y avait un manque de connaissance de l’agrile du frêne et des risques qu’il pose tant chez les propriétaires de camping que chez les campeurs. Elle a aussi montré qu’environ 20 à 30 % des campeurs apportaient leur propre bois de chauffage, une voie potentielle de dispersion de l’insecte. Nous avons éprouvé beaucoup de difficultés à entrer en contact avec les commerçants, de sorte que nous devons revoir notre stratégie de collecte d’information pour cette catégorie d’utilisateurs. En conclusion, la mise sur pied d’une campagne d’information et de formation intensive s’avère essentielle afin de mobiliser tous les intervenants du milieu. De la même manière, la création d’un système de traçabilité du bois permettrait d’assurer qu’aucun bois infesté ne soit déplacé sur le territoire de la Montérégie.
Première mention du saltique d’Adanson, Hasarius adansoni (Savigny et Audouin, 1825) (Araneae : Salticidae : Hasariinae), au Canada
Authors: Brisson Jean Denis , Simard Claude 
Published: June 2013

La découverte au Canada d’une espèce tropicale d’araignée à l’intérieur d’un édifice n’est pas surprenante en soi ; ce qui l’est cependant, c’est la présence d’une petite population établie depuis quelques années dans un pavillon de l’Université Laval, à Québec. Plusieurs mâles, femelles, adultes et juvéniles du saltique d’Adanson (Hasarius adansoni [Savigny et Audouin, 1825]) ont en effet été trouvés dans un aménagement intérieur de plantes tropicales de l’atrium du pavillon de l’Envirotron. Nous précisons les conditions de la découverte, la position taxinomique de l’espèce, sa répartition géographique, favorisée par les activités humaines et son mode d’alimentation possible sur des fourmis, entre autres, évoluant sur les plantes tropicales d’intérieur.
Nanostructured membranes based on cellulose acetate obtained by electrospinning. Part II. Controlled release profile and microbiological behavior
Authors: Nista Silvia Vaz Guerra , D'Ávila Marcos Akira , Martinez Elizabeth Ferreira , Silva Almenara de Souza Fonseca , Mei Lucia Helena Innocentini 
Published: June 2013

ABSTRACTNanofiber membranes of cellulose acetate (CA) were produced with four mixtures of solvents, that is, acetic acid/water, acetone/water, dimethylacetamide (DMAc)/acetone, and DMAc/acetone/water, with the incorporation of the drug gentamicin sulfate at two concentrations. We evaluated the influence of the drug concentration in the electrospinning process. The best membrane produced in this stage was the membrane electrospun with the DMAc/acetone/water solvent mixture, whose process was shown to be viable and did not alter the membrane diameter or aspect with the variation of the drug concentration. Membranes prepared in this way and loaded with 50% of the drug were used for the studies of the release kinetics. Comparisons between the release profiles of the same membranes coated with hydroxypropyl methylcellulose, Eudragit L100, and electrospun CA nanofibers were carried out. The best results on the drug‐release profile were obtained with the membrane coated with nanofibers of CA, which caused a decrease of 9 h in the burst effect. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 2772–2779, 2013
Hispanic ethnicity and acculturation, maternal age and the risk of gastroschisis in the national birth defects prevention study
Authors: Khodr Zeina G. , Lupo Philip J. , Canfield Mark A. , Chan Wenyaw , Cai Yi , Mitchell Laura E. 
Published: June 2013

IntroductionStudies indicate that gastroschisis is associated with maternal age, ethnicity, and acculturation. This analysis was conducted to further define the associations between gastroschisis and parental Hispanic ethnicity and acculturation, and to determine whether such associations vary by maternal age.Methods:This study was based on data from mothers of 753 gastroschisis cases and 6,496 control infants in the National Birth Defects Prevention Study. The relationships between gastroschisis and both parental Hispanic ethnicity and acculturation, within maternal age strata (<20 versus ≥20 years at conception), were assessed using logistic regression and principal component analyses.Results:The risk of gastroschisis in offspring of women <20 years old was not significantly associated with parental Hispanic ethnicity or acculturation. Among mothers ≥20 years old, US‐born non‐Hispanic white parents had a lower risk of gastroschisis in offspring as compared to either US‐born Hispanic (odds ratios [ORs] ranging from 0.55 to 0.60) or English‐speaking Hispanic (ORs ranging from 0.58 to 0.65) parents. Further, compared with US born Hispanic women ≥20 years, the risk of gastroschisis was lower for Hispanic women who had lived in the US <5 years (OR=0.35, 95% confidence interval [CI]: 0.17, 0.74) or who migrated to the US at ≥20 years (OR=0.47, 95% CI: 0.25, 0.88).Conclusion:These results provide further evidence that gastroschisis risk is associated with ethnicity and some aspects of acculturation. Additionally, these associations were limited to the offspring of women who are ≥20 at the time of conception. Birth Defects Research (Part A) 97:538‐545, 2013. © 2013 Wiley Periodicals, Inc.
SAR study and conformational analysis of a series of novel peptide G protein‐coupled receptor kinase 2 inhibitors
Authors: Gomez‐Monterrey Isabel , Carotenuto Alfonso , Cipolletta Ersilia , Sala Marina , Vernieri Ermelinda , Limatola Antonio , Bertamino Alessia , Musella Simona , Grieco Paolo , Trimarco Bruno , Novellino Ettore , Iaccarino Guido , Campiglia Pietro 
Published: June 2013

ABSTRACTG protein‐coupled receptor kinase 2 (GRK2) plays a central role in the cellular transduction network. In particular, during chronic heart failure GRK2 is upregulated and believed to contribute to disease progression. Thereby, its inhibition offers a potential therapeutic solution to several pathological conditions. In the present study, we performed a SAR study and a NMR conformational analysis of peptides derived from HJ loop of GRK2 and able to selectively inhibit GRK2. From Ala‐scan and d‐Ala point replacement, we found that Arg residues don't affect the inhibitory properties, while a d‐amino acid at position 5 is key to the activity. Conformational analysis identified two β‐turns that involve N‐terminal residues, followed by a short extended region. These information can help the design of peptides and peptido‐mimetics with enhanced GRK2 inhibition properties. © 2013 Wiley Periodicals, Inc. Biopolymers 101: 121–128, 2014.
Gib der Blüte Zucker!
Authors: Lauschke Karin 
Published: June 2013

AbstractBevor Pflanzen blühen, überprüfen sie ihre Energiereserven. Wie sie das anstellen, war lange ein Rätsel. Nun wurde das Schlüsselmolekül entdeckt: Der Zucker Trehalose‐6‐Phosphat überwacht den Energiegehalt und reguliert die Blütenbildung.
A sensitive LC‐MS/MS method for the quantification of febuxostat in human plasma and its pharmacokinetic application
Authors: Vaka Venkata Rami Reddy , Inamadugu Jaswanth Kumar , Pilli Nageswara Rao , Ramesh Mullangi , Katreddi Hussain Reddy 
Published: June 2013

ABSTRACTAn improved, simple and highly sensitive LC‐MS/MS method has been developed and validated for quantification of febuxostat with 100 μL human plasma using febuxostat‐d7 as an internal standard (IS) according to regulatory guidelines. The analyte and IS were extracted from human plasma via liquid–liquid extraction using diethyl ether. The chromatographic separation was achieved on a Zorbax C18 column using a mixture of acetonitrile and 5 mm ammonium formate (60:40, v/v) as the mobile phase at a flow rate of 0.5 mL/min. The total run time was 5.0 min and the elution of febuxostat and IS occurred at 1.0 and 1.5 min, respectively. A linear response function was established for the range of concentrations 1–6000 ng/mL (r > 0.99). The precursor to product ion transitions monitored for febuxostat and IS were m/z 317.1 → 261.1 and 324.2 → 262.1, respectively. The intra‐ and inter‐day precisions (%RSD) were within 1.29–9.19 and 2.85–7.69%, respectively. The proposed method was successfully applied to pharmacokinetic studies in humans. Copyright © 2013 John Wiley & Sons, Ltd.
Synthesis of Phenylethenyl Methyl Carbonate by Methoxycarbonylation of Phenylacetaldehyde with Dimethyl Carbonate
Authors: Wu D. , Chen Z. 
Published: June 2013

AbstractA novel and convenient route for the synthesis of phenylethenyl methyl carbonate by the methoxycarbonylation of phenylacetaldehyde with dimethyl carbonate was developed in the presence of solid base catalysts. The results showed that solid bases with moderate strength such as MgO favored the formation of phenylethenyl methyl carbonate, and the yield of phenylethenyl methyl carbonate could be linearly correlated with the amount of moderate basic sites. The function of basic catalysts was mainly ascribed to the activation of phenylacetaldehyde via the abstraction of α‐H by the base sites.
Systematic Selection of Metalloporphyrin‐Based Catalysts for Oxygen Reduction by Modulation of the Donor–Acceptor Intermolecular Hardness
Authors: Masa Justus , Schuhmann Wolfgang 
Published: June 2013

AbstractIncisive modulation of the intermolecular hardness between metalloporphyrins and O2 can lead to the identification of promising catalysts for oxygen reduction. The dependency of the electrocatalytic reduction of O2 by metalloporphyrins on the nature of the central metal yields a volcano‐type curve, which is rationalized to be in accordance with the Sabatier principle by using an approximation of the electrophilicity of the complexes. By using electrochemical and UV/Vis data, the influence of a selection of meso‐substituents on the change in the energy for the π→π* excitation of manganese porphyrins was evaluated allowing one to quantitatively correlate the influence of the various ligands on the electrocatalysis of O2 reduction by the complexes. A manganese porphyrin was identified that electrocatalyzes the reduction of oxygen at low overpotentials without generating hydrogen peroxide. The activity of the complex became remarkably enhanced upon its pyrolysis at 650 °C.
ChemInform Abstract: Crystal Chemistry, Band Engineering, and Photocatalytic Activity of the LiNb3O8—CuNb3O8 Solid Solution.
Authors: Sahoo Prangya Parimita , Maggard Paul A. 
Published: June 2013

AbstractLi1‐xCuxNb3O8 (0 ≤ x ≤ 1) solid solutions are prepared by solid state reaction of stoichiometric amounts of Li2CO3, Cu2O, and Nb2O5 (evacuated silica tube, 750 °C, 2 d).
ChemInform Abstract: Preparation, Characterization and Photocatalytic Activity of CuBi2O4/NaTaO3 Coupled Photocatalysts.
Authors: Deng Yongyong , Chen Youjian , Chen Bingang , Ma Jianhua 
Published: June 2013

AbstractA series of p‐n heterojunction photocatalysts p‐CuBi2O4/n‐NaTaO3 is prepared by a grinding—annealing method.
ChemInform Abstract: Growing Crystalline Chalcogenidoarsenates in Surfactants: From Zero‐Dimensional Cluster to Three‐Dimensional Framework.
Authors: Xiong Wei‐Wei , Athresh Eashwer Umesh , Ng Yu Ting , Ding Junfeng , Wu Tom , Zhang Qichun 
Published: June 2013

AbstractCrystals of new thioarsenates are prepared using three different surfactants as reaction media.
ChemInform Abstract: syn‐Selective Kobayashi Aldol Reaction Using Acetals.
Authors: Tsukada Hiroyuki , Mukaeda Yuki , Hosokawa Seijiro 
Published: June 2013

AbstractChiral silyl dienol ether (I) reacts with acetals in the presence of a Lewis acid to afford syn‐adducts such as (III) and (V) as major products.
ChemInform Abstract: Visible‐Light‐Induced Synthesis of a Variety of Trifluoromethylated Alkenes from Potassium Vinyltrifluoroborates by Photoredox Catalysis.
Authors: Yasu Yusuke , Koike Takashi , Akita Munetaka 
Published: June 2013

AbstractA new and facile visible‐light‐induced synthesis of title compounds (III)/(IV) using a Ru‐photoredox catalyst is reported.
ChemInform Abstract: Solvent Dependent Reductive Defluorination of Aliphatic C—F Bonds Employing Sm(HMDS)2.
Authors: Janjetovic Mario , Traeff Annika M. , Ankner Tobias , Wettergren Jenny , Hilmersson Goeran 
Published: June 2013

AbstractPrimary, secondary, and tertiary alkyl fluorides (I) can be efficiently reduced using stoichiometric amounts of Sm(HMDS)2 in hexane.
ChemInform Abstract: Grignard Allylic Substitution Reaction Catalyzed by 1,2,3‐Triazol‐5‐ylidene Magnesium Complexes.
Authors: Nomura Ryosuke , Tsuchiya Yuji , Ishikawa Hiroyuki , Okamoto Sentaro 
Published: June 2013

AbstractThe title complexes, generated in situ, efficiently catalyze the substitution reaction of allylic and propargylic compounds with Grignard reagents.
ChemInform Abstract: Arylation of Geminally Activated Nitroethenes.
Authors: Baichurin R. I. , Aboskalova N. I. , Trukhin E. V. , Berestovitskaya V. M. 
Published: June 2013

AbstractHighly electron‐deficient compounds such as cyano‐ and acylnitroethenes are suitable nitroalkylating agents for N,N‐dimethylaniline.
ChemInform Abstract: Cu(OAc)2‐Catalyzed Thiolation of Acyl C—H Bonds with Thiols Using TBHP as an Oxidant.
Authors: Yuan Yan‐qin , Guo Sheng‐rong , Xiang Jian‐nan 
Published: June 2013

AbstractOptimized conditions allow the coupling of formamides (I) with various thiols through direct oxidation of acyl C—H bonds to produce thiocarbamates (40 examples).
ChemInform Abstract: A PEG Bridged Tertiary Amine Functionalized Ionic Liquid Exhibiting Thermoregulated Reversible Biphasic Behavior with Cyclohexane/Isopropanol: Synthesis and Application in Knoevenagel Condensation.
Authors: Luo Jun , Xin Tantan , Wang Yinglei 
Published: June 2013

AbstractA novel tertiary amine functionalized polyethylene glycol bridged dicationic ionic liquid is synthesized and used as facile and recyclable catalyst and co‐solvent in Knoevenagel condensation reactions of aromatic aldehydes with active methylene compounds.
ChemInform Abstract: Synthesis of an Alkylthio‐Substituted Dibenz[a,j]anthracene with Improved Solubility via the Oxidative Photocyclization of 1,3‐Distyrylbenzene Derivatives.
Authors: Toyoshima Takuya , Yoshida Satoshi , Watanabe Soichiro 
Published: June 2013

AbstractThe oxidative photocyclization of various 2‐substituted 1,3‐distyrylbenzenes is studied.
ChemInform Abstract: α‐Carboxy‐β‐lactones from Photoinduced Ring Contraction of 3‐Diazodihydrofuran‐2,4‐diones.
Authors: Beneke Julia , Schobert Rainer 
Published: June 2013

AbstractIn the presence of alcohols or thiols, formation of β‐lactones via Wolff rearrangement takes place.
ChemInform Abstract: Facile, Eco‐Friendly, Catalyst‐Free Synthesis of Polyfunctionalized 2‐Aminopyrroles
Authors: Yu Wanwan , Chen Wenteng , Liu Shen , Shao Jiaan , Shao Zhanying , Lin Haili , Yu Yongping 
Published: June 2013

Abstractvia reaction of vinyl azides with α‐cyano derivatives
ChemInform Abstract: [3 + 2] Cycloadditions of α‐Acyl Ketene Dithioacetals with Propargylamines: Pyrrole Synthesis in Water.
Authors: Ren Chuan‐Qing , Di Chong‐Hui , Zhao Yu‐Long , Zhang Jing‐Ping 
Published: June 2013

AbstractVarious polysubstituted pyrroles are synthesized in a single step.
ChemInform Abstract: 3‐Bromooxindoles as Nucleophiles in Asymmetric Organocatalytic Mannich Reactions with N‐Ts‐Imines.
Authors: Li Jianhao , Du Taiping , Zhang Gang , Peng Yungui 
Published: June 2013

AbstractThis direct asymmetric Mannich reaction of N‐unprotected 3‐bromooxindoles, catalyzed by a quinidine‐derived thiourea organocatalyst, affords products with vicinal tertiary and brominated quaternary stereogenic centers in good diastereo‐ and enantioselectivities.
ChemInform Abstract: Thermal Transformations of Alk‐1‐enyl‐N‐phthalimidoaziridines.
Authors: Kuznetsov M. A. , Voronin V. V. 
Published: June 2013

AbstractThe thermal transformation of different alk‐1‐enyl‐N‐phthalimidoaziridines depends strongly on their substitution pattern.
ChemInform Abstract: Gold‐Catalyzed Addition of N‐Hydroxy Heterocycles to Alkynes and Subsequent 3,3‐Sigmatropic Rearrangement.
Authors: Kumar Manish , Scobie Martin , Mashuta Mark S. , Hammond Gerald B. , Xu Bo 
Published: June 2013

AbstractThe two‐step procedure represents an efficient oxygen transfer protocol which incorporates a nucleophilic oxygen atom into an alkyne group.
ChemInform Abstract: Gold Catalyzed Stereoselective Tandem Hydroamination—Formal Aza‐Diels—Alder Reaction of Propargylic Amino Esters.
Authors: Fustero Santos , Bello Paula , Miro Javier , Sanchez‐Rosello Maria , Maestro Miguel A. , Gonzalez Javier , del Pozo Carlos 
Published: June 2013

AbstractThe overall sequence of the tandem reaction presented here leads to nitrogen‐containing tetracycles under formation of 4 bonds and five stereocenters, in most cases as single diastereoisomers.
ChemInform Abstract: Aldol Reactions of 2‐Thioxotetrahydropyrimidin‐4(1H)‐ones: Stereoregulations from Endo‐ and Exocyclic Chiral Centers.
Authors: Kumar Varun , Kumar Kapil , Pal Anang , Khatik Gopal Lal , Nair Vipin A. 
Published: June 2013

AbstractReactions of the compounds (I) with aldehydes proceed with high anti‐stereoselectivity giving a mixture of two diastereoisomers.
ChemInform Abstract: Organocatalytic Enantioselective Strecker Reaction of Cyclic Trifluoromethyl‐Ketoimines.
Authors: Xie Hexin , Song Aiguo , Song Xixi , Zhang Xinshuai , Wang Wei 
Published: June 2013

AbstractHigh yields and enantioselectivities are obtained for substrates bearing a ‐CF3 function at C‐4.
ChemInform Abstract: The First Synthesis of 7‐(Hydroxymethyl)thiepane‐3,4,5‐triols from D‐(‐)‐Quinic Acid.
Authors: Shih Tzenge‐Lien , Gao Wei‐Lin 
Published: June 2013

AbstractUsing D‐(‐)‐quinic acid as chiral building block, a series of novel seven‐membered‐ring thiosugars are synthesized.
ChemInform Abstract: Polyoxygenated Diterpenoids of the Eunicellin‐Type from the Chinese Soft Coral Cladiella krempfi.
Authors: Cai You‐Sheng , Yao Li‐Gong , Di Pascale Antonio , Irace Carlo , Mollo Ernesto , Taglialatela‐Scafati Orazio , Guo Yue‐Wei 
Published: June 2013

AbstractFour new diterpenoids (I‐III) have been isolated together with five already known, structurally related diterpenoids.
ChemInform Abstract: New Cyclic Tetrapeptides and Asteltoxins from Gorgonian‐Derived Fungus Aspergillus sp. SCSGAF 0076.
Authors: Bao Jie , Zhang Xiao‐Yong , Xu Xin‐Ya , He Fei , Nong Xu‐Hua , Qi Shu‐Hua 
Published: June 2013

AbstractAspergillipeptides A‐C (Ia‐c) and asteltoxin B (II) are isolated and characterized.
ChemInform Abstract: FexCo3‐xO4 Nanoporous Particles Stemmed from Metal—Organic Frameworks Fe3[Co(CN)6]2: A Highly Efficient Material for Removal of Organic Dyes from Water.
Authors: Hu Lin , Huang Yimin , Chen Qianwang 
Published: June 2013

AbstractFe3[Co(CN)6] is obtained from an aqueous solution of K3[Co(CN)6] and FeSO4 in the presence of poly(vinylpyrrolidone) at room temperature.
ChemInform Abstract: Technological Prospection on Solid‐State Fermentation
Authors: Gasparotto Juliana M. , Kuhn Raquel C. , Foletto Edson L. , Jacques Rodrigo J. S. , Guedes Jerson V. C. , Jahn Sergio L. , Mazutti Marcio A. 
Published: June 2013

AbstractReview: 75 refs.
Achiral‐to‐Chiral Transition in Benzil Solidification: Analogies with Racemic Conglomerates Systems Showing Deracemization
Authors: El‐Hachemi Zoubir , Arteaga Oriol , Canillas Adolf , Crusats Joaquim , Sorrenti Alessandro , Veintemillas‐Verdaguer Sabino , Ribo Josep M. 
Published: June 2013

ABSTRACTExperimental results show that benzil (1,2‐diphenyl‐1,2‐ethanedione), an achiral compound that crystallizes as a racemic conglomerate, yields by solidification polycrystalline scalemic mixtures of high enantiomeric excesses. These results are related to those previously reported in this type of compounds on deracemizations of racemic mixtures of crystal enantiomorphs obtained by wet grinding. However, the present results strongly suggest that these experiments cannot be explained without taking into account chiral recognition interactions at the level of precritical clusters. The conditions that would define a general thermodynamic scenario for such deracemizations are discussed. Chirality 25:393–399, 2013. © 2013 Wiley Periodicals, Inc.
DNA‐Nanotechnologie
Authors: Simmel Friedrich C. 
Published: June 2013

AbstractDie herausragenden molekularen Erkennungseigenschaften von DNA‐Molekülen werden seit nunmehr zwei Jahrzehnten zur Erschaffung von künstlichen Molekülstrukturen verwendet. Nach der anfänglichen Herstellung von einfachen molekularen Objekten und gitterähnlichen Strukturen hat mit der Erfindung der DNA‐Origami‐Technik die Komplexität der Strukturen in den vergangenen Jahren stark zugenommen. Nun ist die Konstruktion nahezu beliebiger molekularer Nanostrukturen aus DNA in zwei und gar drei Dimensionen möglich – und erste konkrete Anwendungen in Biomedizin und Nanotechnologie sind greifbar. Neben statischen molekularen Konstruktionen können auch dynamische Systeme entwickelt werden, so z.B. molekulare Maschinen, molekulare Motoren sowie molekulare Computer. Die Kombination dieser Funktionen in integrierten Systemen führt gegenwärtig zur Entwicklung erster molekularer “Roboter” und Fertigungslinien für die Nanotechnologie.
Primo Levis Erzählung Kohlenstoff und ihre mögliche Vorlage
Authors: Soentgen Jens 
Published: June 2013

AbstractPrimo Levis 1975 publiziertes Buch Il sistema periodico (Das periodische System, deutsch 1987) wurde 2006 bei einer Befragung des Imperial College in London zum “best science book ever” gekürt. Es ist eines der bekanntesten literarischen Werke mit chemischem Inhalt. Es gliedert sich in 21 Element‐Erzählungen, die berühmteste von diesen ist die vom Kohlenstoff. Im folgenden versuche ich, den Nachweis zu führen, dass diese Geschichte eine Vorlage hatte, nämlich die Erzählung ‘Lebensgeschichte eines Kohlenstoffatoms’ von Helmut Schmid, die 1946 erschien. Ziel des folgenden, kurzen Vergleichs ist, die besonderen literarischen Qualitäten von Levis Version noch besser wahrzunehmen.