bluuebunny/crossref_metadata_2025_split huggingface dataset:
Charge transfer effects on the Fermi surface of Ba0.5K0.5Fe2As2
Authors: Nazir S. , Zhu Z.Y. , Schwingenschlögl U. 
Published: January 2011

AbstractAb‐initio calculations within density functional theory are performed to obtain a more systematic understanding of the electronic structure of iron pnictides. As a prototypical compound we study Ba0.5K0.5Fe2As2 and analyze the changes of its electronic structure when the interaction between the Fe2As2 layers and their surrounding is modified. We find strong effects on the density of states near the Fermi energy as well as the Fermi surface. The role of the electron donor atoms in iron pnictides thus cannot be understood in a rigid band picture. Instead, the bonding within the Fe2As2 layers reacts to a modified charge transfer from the donor atoms by adapting the intra‐layer Fe‐As hybridization and charge transfer in order to maintain an As3‐ valence state.
Primates of All Types Swing Through the Pages of The Anatomical Record
Authors: Laitman Jeffrey T. , Albertine Kurt H. 
Published: January 2011

AbstractPainting of a spider monkey (Ateles) in an arboreal setting, gripping tree branches with hands, feet, and prehensile tail. Superimposed is a radiograph of a spider monkey (Ateles) tail (USNM 536100). The original painting is in acrylic, by Tim D. Smith. A special thanks to Leo W. Smith for allowing us to use his bedroom wall mural for the cover of this issue.
Exogenous Material in the Inner Ear of the Adult Port Jackson Shark, Heterodontus Portusjacksoni (Elasmbranchii)
Authors: Mills Morena , Rasch Ron , Siebeck Ulrike E. , Collin Shaun P. 
Published: January 2011

AbstractPrevious studies have suggested that the inner ear of some benthic species of elasmobranchs contain only exogenous material within their otoconial organs, a unique feature within vertebrates. However, these examinations have not accounted for the possibility of otoconial degeneration or used modern experimental methods to identify the materials present. Both of these issues are addressed in this study using inner ear samples from the adult Port Jackson shark, Heterodontus portusjacksoni. A comparison of the otoconial mass in fixed specimens over short and medium time scales reveals that over those timescales the degeneration of calcium carbonate‐based otoconia does not occur and confirms that calcium carbonate‐based otoconia are not found within the otoconial organs of H. portusjacksoni. Additionally, microanalysis of the chemical composition and ultrastructure of the otoconial mass using energy dispersive X‐ray microanalysis and scanning electron microscopy confirms that the entire otoconial mass is comprised of exogenous silicon dioxide particles, bound within a carbon matrix. This exogenous material is suggested to play an equivalent role to the otoconia found in other species of elasmobranchs, and allows both hearing and vestibular control to occur in benthic sharks that spend their lives foraging within a sandy substrate. Anat Rec, 2011. © 2011 Wiley‐Liss, Inc.
Synthesis of 2‐Mercaptobenzimidazole Derivatives as Potential Anti‐microbial and Cytotoxic Agents
Authors: Hosamani Kallappa M. , Shingalapur Ramya V. 
Published: January 2011

AbstractA series of novel 2‐(1H‐benzimidazol‐2‐ylsulfanyl)‐N‐(4‐oxo‐2‐phenyl‐thiazolidin‐3yl)‐acetamide 5a–j have been synthesized from various aldehydes and 2‐(5‐phenyl‐[1,3,4]‐oxadiazol‐2‐ylmethylsulfanyl)‐1H‐benzimidazole 6a–j from various benzoic acids. These compounds were screened for their in‐vitro anti‐bacterial activity against Staphylococcus aureus and Enterococcus faecalis as Gram positive, Klebsiella pneumoniae and Escherichia coli as Gram negative bacterial strains and for in‐vitro anti‐fungal activity against Asperigillus fumigatus and Candida albicans. The in vitro cytotoxic properties were studied using brine shrimp bioassay. Results revealed that, compounds 5b, 5d, 5g, 5i, 6b, 6e, 6f, and 6i showed excellent activity against a panel of microorganisms. The cytotoxic activities of 5b, 5g, 5i, 6b, 6f, 6h, and 6i were found to be good. All the newly synthesized compounds were characterized by elemental analysis, IR, 1H‐NMR, 13C‐NMR and MS.
An oral developmental neurotoxicity study of decabromodiphenyl ether (DecaBDE) in rats
Authors: Biesemeier John A. , Beck Melissa J. , Silberberg Hanna , Myers Nicole R. , Ariano John M. , Radovsky Ann , Freshwater Les , Sved Daniel W. , Jacobi Sylvia , Stump Donald G. , Hardy Marcia L. , Stedeford Todd 
Published: January 2011

AbstractBACKGROUND:Decabromodiphenyl ether (DecaBDE; CASRN 1163‐19‐5) is a flame retardant used in a variety of manufactured products. A single oral dose of 20.1 mg/kg administered to mice on postnatal day 3 has been reported to alter motor activity at 2, 4, and 6 months of age.METHODS:To further evaluate these results, a developmental neurotoxicity study was conducted in the most commonly used species for studies of this type, the rat, according to international validated testing guidelines and Good Laboratory Practice Standards. DecaBDE was administered orally via gavage in corn oil to dams from gestation day 6 to weaning at doses of 0, 1, 10, 100, or 1,000 mg/kg/day. Standard measures of growth, development, and neurological endpoints were evaluated in the offspring. Motor activity was assessed at 2 months of age. Additional motor activity assessments were conducted at 4 and 6 months of age. Neuropathology and morphometry evaluations of the offspring were performed at weaning and adulthood.RESULTS:No treatment‐related neurobehavioral changes were observed in detailed clinical observations, startle response, or learning and memory tests. No test substance‐related changes were noted in motor activity assessments performed at 2, 4, or 6 months of age. Finally, no treatment‐related neuropathological or morphometric alterations were found.CONCLUSIONS:Under the conditions of this study, the no‐observed‐adverse‐effect level for developmental neurotoxicity of DecaBDE was 1,000 mg/kg/day, the highest dose tested.Birth Defects Res (Part B)92:17–35, 2011.© 2011 Wiley‐Liss, Inc.
Vergleich berechneter und gemessener Verformungen der Vorpommernbrücke über die Warnow in Rostock
Authors: Podeyn Dirk , Mertzsch Olaf , Cramer Harald 
Published: January 2011

AbstractBei Spannbetonkonstruktionen ist grundsätzlich ein Nachweis der Verformungen erforderlich. Ausgehend von allgemeinen Betrachtungen zum Nachweis der Bauteilverformungen werden wesentliche materialseitige Einflüsse auf die Verformungsvorhersage diskutiert. Es wird deutlich, dass eine genaue Berechnung der Verformung nur bedingt möglich ist. Am Beispiel der Vorpommernbrücke über die Warnow in Rostock wird der Einfluss von nichtlinearen Materialgesetzen auf die Verformungsvorhersage verdeutlicht. Der Vergleich der Berechnungsergebnisse mit den Messwerten der Verformungen ergab eine gute Übereinstimmung.Comparison of Calculated and Measured Deformations of the West‐Pomerania‐Bridge in RostockGenerally, a proof of the deformations of prestressed concreteconstructions is required. On the basis of a general consideration of the structural deformations the influence of significant material characteristics on the predicted deformations is discussed in this paper. It will be obvious, that an accurate estimation is only possible in a restricted manner. The West‐Pomerania‐Bridge over the Warnow in Rostock serves as an example, to show the influence of non‐linear material‐laws on the predicted deformations. The comparison of the calculated deformations with the measurements results in a good agreement.
Tragverhalten und Dauerhaftigkeit einer schlanken Textilbetonbrücke
Authors: Hegger Josef , Kulas Christian , Raupach Michael , Büttner Till 
Published: January 2011

AbstractAuf der Schwäbischen Alb wurde eine ältere Fußgängerbrücke aus Stahlbeton durch eine neue Brücke aus Textilbeton ersetzt, die durch die Kombination von textilbewehrtem Beton und einer Vorspannung ohne Verbund eine außergewöhnliche Schlankheit erreicht. Bei einer Betondeckung von nur 1,5 cm für die Bewehrung aus technischen Textilien war ein im Vergleich zu Stahlbetonbauteilen ungewöhnlich filigraner mehrstegiger Plattenbalkenquerschnitt als Überbau ausführbar. In dem vorliegenden Beitrag werden Untersuchungen zu den Werkstoffen, zum Tragverhalten und zur Dauerhaftigkeit vorgestellt. Das Tragwerk, die Bemessung und Konstruktion sowie insbesondere das Schwingungsverhalten sind Gegenstand eines separaten Beitrags in diesem Heft.Load‐Bearing Behavior and Durability of a Slender Textile Reinforced Concrete BridgeAn older pedestrian bridge was replaced by a new bridge made of textile reinforced concrete (TRC) in Southern Germany. A remarkable slenderness was achieved by using a combination of TRC and an unbounded prestressing. The concrete cover of only 1,5 cm makes it possible to design an uncommonly slender Tbeam with seven webs and which is used as superstructure. The article deals with the experimental investigations of the material properties, load‐bearing behaviour and durability. The design and construction, especially the dynamic behaviour, of the bearing structure is described in a separate article in this issue.
Resection of hepatocellular carcinoma in patients without cirrhosis
Authors: Smoot R L , Nagorney D M , Chandan V S , Que F G , Schleck C D , Harmsen W S , Kendrick M L 
Published: January 2011

Abstract

Background
Outcomes for patients with hepatocellular carcinoma (HCC) without cirrhosis and factors associated with disease progression remain unclear. The goals of this single-institution study were to define the outcomes for such patients, and to determine factors associated with survival and disease progression.

Methods
This was a retrospective review of consecutive patients with HCC without cirrhosis who underwent hepatic resection between 1985 and 2003. Survival was estimated by the Kaplan–Meier method and risk factors were identified by Cox proportional hazards models.

Results
A total of 143 patients were enrolled, of whom 29·4 per cent had identifiable risk factors for chronic liver disease. Major resection (at least three segments) was undertaken in 63·6 per cent of patients. The operative mortality rate was 3·5 per cent. Median disease-free survival was 2·4 years. Multivariable analysis revealed presence of multiple tumours as the only independent predictor of tumour recurrence. Median overall survival was 3·3 years. Factors independently associated with decreased overall survival were multiple tumours, high histological grade, perioperative transfusion, male sex and age at least 66 years.

Conclusion
Patients with HCC but without cirrhosis have acceptable outcomes after resection. Specific risk factors for the development of HCC in these patients have yet to be defined.
Size‐ and Shape‐Dependent Activity of Metal Nanoparticles as Hydrogen‐Evolution Catalysts: Mechanistic Insights into Photocatalytic Hydrogen Evolution
Authors: Kotani Hiroaki , Hanazaki Ryo , Ohkubo Kei , Yamada Yusuke , Fukuzumi Shunichi 
Published: January 2011

AbstractThe catalytic activity of Pt nanoparticles (PtNPs) with different sizes and shapes was investigated in a photocatalytic hydrogen‐evolution system composed of the 9‐mesityl‐10‐methylacridinium ion (Acr+–Mes: photocatalyst) and dihydronicotinamide adenine dinucleotide (NADH: electron donor), based on rates of hydrogen evolution and electron transfer from one‐electron‐reduced species of Acr+–Mes (Acr.–Mes) to PtNPs. Cubic PtNPs with a diameter of (6.3±0.6) nm exhibited the maximum catalytic activity. The observed hydrogen‐evolution rate was virtually the same as the rate of electron transfer from Acr.–Mes to PtNPs. The rate constant of electron transfer (ket) increased linearly with increasing proton concentration. When H+ was replaced by D+, the inverse kinetic isotope effect was observed for the electron‐transfer rate constant (ket(H)/ket(D)=0.47). The linear dependence of ket on proton concentration together with the observed inverse kinetic isotope effect suggests that proton‐coupled electron transfer from Acr.–Mes to PtNPs to form the PtH bond is the rate‐determining step for catalytic hydrogen evolution. When FeNPs were used instead of PtNPs, hydrogen evolution was also observed, although the hydrogen‐evolution efficiency was significantly lower than that of PtNPs because of the much slower electron transfer from Acr.–Mes to FeNPs.
Synthesis and Isomerization Studies of Cyclotrisazobiphenyl
Authors: Reuter Raphael , Wegner Hermann A. 
Published: February 2011

AbstractWe report an efficient synthesis of cyclotris[(E)‐3′‐(biphenyl‐3‐yldiazenyl)] compounds (CTBs). An unsubstituted CTB molecule is accessible in four steps in 10 % yield overall, whereas a hexa(methoxymethyl ether) CTB analogue was prepared in nine steps (26 % yield). The final macrocyclization step was accomplished in up to 80 % yield by using a metal‐template effect. Furthermore, the photochromic properties were investigated, and all four isomers were detected and characterized by NMR spectroscopy. A strong influence from the solvent and the irradiation wavelength on the switching process was observed. Irradiation in pyridine yielded the highest amount of the all‐Z isomer in the photostationary state. For a full conversion to the all‐E isomer, the reaction has to be heated to 45 °C. The isomerization to the all‐E isomer is slow at room temperature, with a half‐life time of the all‐Z isomer of more than nine days in dimethyl sulfoxide (DMSO). Conditions were established to access each possible isomer as the major component in the photostationary state.
ChemInform Abstract: A Series of New Ternary and Quaternary Compounds in the LiI—GaIII—TeIV—O System.
Authors: Kong Fang , Xu Xiang , Mao Jiang‐Gao 
Published: February 2011

AbstractA systematic search of new compounds in the title system leads to the new isomeric ternary compounds (III) and (IV) (very low yield) and the quaternary compounds (VII) and (VIII).
ChemInform Abstract: A New Palladium Precatalyst Allows for the Fast Suzuki—Miyaura Coupling Reactions of Unstable Polyfluorophenyl and 2‐Heteroaryl Boronic Acids.
Authors: Kinzel Tom , Zhang Yong , Buchwald Stephen L. 
Published: February 2011

AbstractPolyfluorophenylboronic acid and five‐membered heteroaromatic boronic acids are used as coupling partners for Suzuki—Miyaura reactions in the presence of a newly developed precatalyst.
ChemInform Abstract: Pyrrolidine‐Based Dicationic Acidic Ionic Liquids: Efficient and Recyclable Catalysts for Esterifications.
Authors: Liu Xiaofei , Zhao Yingwei , Li Zhen , Chen Jing , Xia Chungu 
Published: February 2011

AbstractA highly efficient and eco‐friendly esterification is achieved by a series of novel dicationic ionic liquids (the most efficient is shown in the scheme).
ChemInform Abstract: Palladium‐Catalyzed [1,3]‐O‐to‐C Rearrangement of Pyrans Toward Functionalized Cyclohexanones.
Authors: Brioche Julien C. R. , Barker Thomas A. , Whatrup David J. , Barker Michael D. , Harrity Joseph P. A. 
Published: February 2011

AbstractRearrangement of the pyran‐based aryl enol ethers proceeds with nearly complete diastereoselectivity affording the (E)‐trans products, regardless whether (E)‐ or (Z)‐substrates are being used.
ChemInform Abstract: Highly Selective Aldol Condensation Using Amine‐Functionalized SiO2—Al2O3 Mixed‐Oxide under Solvent‐Free Condition.
Authors: Abbaspourrad Alireza , Javad Kalbasi Roozbeh , Zamani Farzad 
Published: February 2011

AbstractThe effects of solvent, temperature, catalyst support and amine loading on conversion and selectivity are studied.
ChemInform Abstract: One‐Pot Two‐Step Oxidative Cleavage of 1,2‐Arylalkenes to Aryl Ketones Instead of Arylaldehydes in an Aqueous Medium: A Complementary Approach to Ozonolysis.
Authors: Sharma Naina , Sharma Abhishek , Kumar Rakesh , Shard Amit , Sinha Arun K. 
Published: February 2011

AbstractThe title reaction is applicable to diverse aromatic and polyaromatic arylalkenes bearing electron‐donating or ‐withdrawing groups on the aromatic ring.
ChemInform Abstract: Rearrangement of 5‐Phenylthiazolidine‐2,4‐diones to Chiral α‐Ketoamides via α‐Elimination.
Authors: Munive Laura , Bernes Sylvain , Sansinenea Estibaliz , Ortiz Aurelio 
Published: February 2011

AbstractBased‐mediated reaction of thiones (I) in the presence of acetyl chloride gives diones (III) which undergo unexpected rearrangement in basic media to produce aryl‐α‐ketoamides (IV).
ChemInform Abstract: Rhodium‐Catalyzed Interconversion Between Acid Fluorides and Thioesters Controlled Using Heteroatom Acceptors.
Authors: Arisawa Mieko , Yamada Toru , Yamaguchi Masahiko 
Published: February 2011

AbstractThe equilibrium transfer can be used to synthesize acid fluorides in the presence of hexafluorobenzene [cf.
ChemInform Abstract: Oxidation of Arylthiourea by Cetyltrimethylammonium Dichromate.
Authors: Sahu Sandhyamayee , Sahoo Prangya Rani , Patel Sabita , Mishra B. K. 
Published: February 2011

AbstractIf the reaction is carried out in the absence of acetic acid the yields of the desired products (II) decrease along with an increase of corresponding aryl isonitriles (III).
ChemInform Abstract: 2‐[3‐(2‐Aminoethylsulfanyl)propylsulfanyl]ethanamine Bearing Dansyl Subunits: An Efficient, Simple and Rapid Fluorometric Sensor for the Detection of Mercury(II) Ions.
Authors: Wanichacheva Nantanit , Kamkaew Anyanee , Watpathomsub Supranee , Lee Vannajan Sanghiran , Grudpan Kate 
Published: February 2011

AbstractTitle compound (I) exhibits highly sensitive and selective on‐off Hg2+ fluorescence quenching behavior in aqueous MeCN solutions.
ChemInform Abstract: An Unexpected Skeletal Transformation of 1,4‐Dihydroxythioxanthen‐9‐one on Treatment with Iodic Acid: The First Construction of the 2‐(5‐Oxofuran‐2‐ylidene)‐1‐benzothienyl‐3‐one Core.
Authors: Loskutov Vladimir A. , Gatilov Yurii V. , Shteingarts Vitalij D. 
Published: February 2011

AbstractTreatment of substrate (I) with HIO3 results in formation of the corresponding trione and an unexpected rearrangement product (II).
ChemInform Abstract: Pyrroloindoles. Part 22. Optimization of Preparative Methods for Some Isomeric Pyrroloindoles.
Authors: Samsoniya Sh. A. , Chikvaidze I. Sh. , Kadzhrishvili D. O. , Targamadze N. L. 
Published: February 2011

AbstractTwo alternative routes for the synthesis of angular and linear pyrroloindoles are developed.
ChemInform Abstract: Regioselective Palladium‐Catalyzed Arylation of 4‐Chloropyrazoles.
Authors: Mateos Carlos , Mendiola Javier , Carpintero Mercedes , Minguez Jose Miguel 
Published: February 2011

AbstractA library of 5‐arylchloropyrazoles is prepared using a wide range of para‐, meta‐substituted aryl bromides and a 3‐pyridyl bromide [cf.
ChemInform Abstract: Synthesis and Antimicrobial Activity of Certain Benzimidazole and Fused Benzimidazole Derivatives.
Authors: Eisa Hassan M. , Barghash Alaa‐eldin M. , Badr Sahar M. , Farahat Abdelbasset A. 
Published: February 2011

AbstractCompounds (VI), (IX), (XIV), and (XVII) show interesting antibacterial activity against E.
ChemInform Abstract: Synthesis and Antifungal Activity of Novel 5‐Substituted 4‐(1,3,4‐Thiadiazol‐2‐yl)benzene‐1,3‐diols.
Authors: Matysiak Joanna , Skrzypek Alicja , Niewiadomy Andrzej 
Published: February 2011

AbstractTwelve target compounds are prepared in a one‐pot reaction and screened in vitro against 5 phytopathogenic fungi.
ChemInform Abstract: A Direct Intramolecular C—H Amination Reaction Cocatalyzed by Copper(II) and Iron(III) as Part of an Efficient Route for the Synthesis of Pyrido[1,2‐a]benzimidazoles from N‐Aryl‐2‐aminopyridines.
Authors: Wang Honggen , Wang Yong , Peng Changlan , Zhang Jiancun , Zhu Qiang 
Published: February 2011

AbstractElectron‐withdrawing substituents in the meta position of the aniline moiety and any position of the pyridine ring are unfavorable in this reaction.
ChemInform Abstract: Novel Thienopyridine Derivatives as Specific anti‐Hepatocellular Carcinoma (HCC) Agents: Synthesis, Preliminary Structure—Activity Relationships, and in vitro Biological Evaluation.
Authors: Yang Li , et al. et al. 
Published: February 2011

AbstractThe most potent compound (VIIa) exhibits hepatocellular carcinoma (HCC)‐specific anticancer activity and can specifically inhibit the proliferation of the human hepatoma HepG2 cells.
ChemInform Abstract: Easy and Efficient Copper‐Catalyzed Synthesis of Bicyclic Pyrimidinones under Mild Conditions.
Authors: Guo Qi , Yang Haijun , Liu Hongxia , Jiang Yuyang , Fu Hua 
Published: February 2011

AbstractThe title pyrimidones, containing six‐, seven‐, or eight‐membered rings, are prepared via cascade reactions of corresponding 2‐bromocycloalk‐1‐enecarboxylic acids (I) with amidines or guanidines under mild conditions.
ChemInform Abstract: Synthesis and Characterization of Polycarbonyl Compounds via Their BF2‐Adducts.
Authors: Kersten Laura , Roesner Stefan , Hilt Gerhard 
Published: February 2011

Abstract1,4‐Hydrovinylation reaction of 2,3‐dimethyl‐ or 2,3‐dipropyl‐1,3‐butadienes [cf.
ChemInform Abstract: Facile Synthesis of Hypersilylated Aromatic Compounds by Palladium‐Mediated Arylation Reaction.
Authors: Lesbani Aldes , Kondo Hitoshi , Sato Jun‐ichi , Yamanoi Yoshinori , Nishihara Hiroshi 
Published: February 2011

AbstractA variety of variably substituted aryl iodides is transformed into the title hypersilylated compounds by a novel mild protocol, that leaves the Si‐Si bonds intact.
ChemInform Abstract: The Synthesis of a Chiral β‐Amino Acid Derivative by the Grignard Reaction of an Aspartic Acid Equivalent.
Authors: Pan Xianhua , et al. et al. 
Published: February 2011

AbstractA novel approach to the enantiopure β‐amino acid derivative (IV), a key intermediate in the synthesis of the new dipeptidyl peptidase IV inhibitor sitagliptin, is developed.
ChemInform Abstract: Microwave‐Assisted Synthesis of 3‐Aryl‐pyrimido[5,4‐e][1,2,4]triazine‐5,7‐(1H,6H)‐dione Libraries: Derivatives of Toxoflavin
Authors: Todorovic Nick , Giacomelli Andrew , Hassell John A. , Frampton Christopher S. , Capretta Alfredo 
Published: February 2011

Abstract15 examples
ChemInform Abstract: Flavonoids from Dracocephalum tanguticum and Their Cardioprotective Effects Against Doxorubicin‐Induced Toxicity in H9c2 Cells
Authors: Wang Shu‐Qi , Han Xiu‐Zhen , Li Xia , Ren Dong‐Mei , Wang Xiao‐Ning , Lou Hong‐Xiang 
Published: February 2011

Abstractisolation, structure elucidation and evaluation of antioxidant and cytoprotective activities of 17 flavonoids including the new flavonoids (I) and (II), preliminary structure—activity relationships
ChemInform Abstract: New Stilbenoid with Inhibitory Activity on Viral Neuraminidases from Erythrina addisoniae.
Authors: Nguyen Phi Hung , Na MinKyun , Dao Trong Tuan , Ndinteh Derek Tantoh , Mbafor Joseph Tanyi , Park Jaeyoung , Cheong Hyeonsook , Oh Won Keun 
Published: February 2011

AbstractTwo new stilbenoids (I) and (II) are isolated along with seven known flavonoid compounds from the root bark of Erythrina addisoniae.
ChemInform Abstract: Optical Resolution of Single‐Walled Carbon Nanotubes Through Molecular Recognition with Chiral Diporphyrin Nanotweezers
Authors: Peng Xiaobin , Wang Feng , Bauri Ajoy Kumar , Rahman A. F. M. Mustafizur , Komatsu Naoki 
Published: February 2011

AbstractReview: 56 refs.