bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Efficient One‐Pot Synthesis of 14‐Substituted‐14H‐dibenzo[a,j]xanthenes Using Boric Acid under Solvent‐Free Conditions.
Authors: Karimi‐Jaberi Zahed , Keshavarzi Mohsen 
Published: August 2010

AbstractThe inexpensive catalyst allows the preparation of the biologically interesting products (IIII) in excellent yields within a short time.
ChemInform Abstract: 4‐Alkoxycarbonyl‐2‐(2‐pyridyl)thiazoles and Their Complexes with CuII and CoII. Molecular and Crystal Structure of Copper 4‐Ethoxycarbonyl‐2‐(2‐pyridyl)thiazole Dichloride.
Authors: Majouga A. G. , Beloglazkina E. K. , Frolov V. V. , Moiseeva A. A. , Zyk N. V. 
Published: August 2010

AbstractThe synthesis of ligands (IV) and (VI), the preparation of their Cu(II), Co(II) and Ni(II) complexes, as well as the electrochemical behavior of these ligands and complexes are presented.
ChemInform Abstract: Highly Enantioselective Hydrogenation of Quinoline and Pyridine Derivatives with Iridium‐(P‐Phos) Catalyst.
Authors: Tang Wei‐Jun , Tan Jing , Xu Li‐Jin , Lam Kim‐Hung , Fan Qing‐Hua , Chan Albert S. C. 
Published: August 2010

AbstractThe Ir‐catalyzed enantioselective hydrogenation of quinolines with the P‐Phos ligand is carried out at high S/C ratios (up to 50000) with high TON values (up to 43000) and excellent e.e.
ChemInform Abstract: Alk‐2‐yn‐1‐amines in the Synthesis of Substituted Quinolines in the Presence of Palladium Complexes.
Authors: Shaibakova M. G. , Makhmudiyarov G. A. , Khalilov L. M. , Paramonov E. A. , Ibragimov A. G. , Dzhemilev U. M. 
Published: August 2010

AbstractSubstituted quinolines are synthesized in an effective one‐step procedure via reaction of o‐iodoaniline with alk‐2‐yn‐1‐amines.
ChemInform Abstract: Intramolecular Aldol Reaction of N‐Acylated (2‐Aminophenyl)‐α‐oxoacetic Acids: Rapid Access to Tri‐ and Tetracyclic 1,2‐Dihydroquinolin‐2(1H)‐ones.
Authors: Hellal Malik , Cuny Gregory D. 
Published: August 2010

AbstractAll substrates are prepared following the sequence A)/B) shown for examples (III).
ChemInform Abstract: Thieno[2,3‐d]pyrimidines in the Synthesis of Antitumor and Antioxidant Agents.
Authors: Aly Ashraf A. , Brown Alan B. , Ramadan Mohamed , Gamal‐Eldeen Amira M. , Abdel‐Aziz Mohamed , Abuo‐Rahma Gamal El‐Din A. A. , Radwan Mohamed F. 
Published: August 2010

AbstractChemical synthesis and preliminary investigation of antitumor and antioxidant activities are reported.
ChemInform Abstract: Synthesis of Some Quinazolines Derived from 6,8‐Dibromo‐2‐(2‐carboxyphenyl)‐4H‐3,1‐benzoxazin‐4‐one as Antimicrobial Agents.
Authors: Nassar I. F. 
Published: August 2010

AbstractSome of the new compounds, e.g. (V) and (XVI), exhibit antimicrobial activities against Gram‐positive bacteria, while compound (IX) is only active against Gram‐negative bacteria.
ChemInform Abstract: Totally Regio‐ and Stereoselective Synthesis of (E)‐3‐Arylidene‐3,4‐dihydro‐2H‐1,4‐benzoxazines under Palladium Catalyst.
Authors: Chowdhury Chinmay , Brahma Kaushik , Mukherjee Sanjukta , Sasmal Anup Kumar 
Published: August 2010

AbstractA general one‐pot Pd‐catalyzed synthesis of the target compounds (E)‐3‐arylidene‐1,4‐benzoxazines starts from inexpensive and readily available starting materials.
ChemInform Abstract: Diastereoselective Synthesis of Fused [1,3]Oxazines from Ethyl Pyruvate, Activated Acetylenes and N‐Heterocycles.
Authors: Yavari Issa , Mirzaei Anvar , Hossaini Zinatosadat , Souri Sanaz 
Published: August 2010

AbstractThe 1:1 zwitterionic intermediates obtained from the reaction of various heterocycles with activated acetylenes such as (III) or (VIII) are trapped by ethyl pyruvate (II) to give highly functionalized fused [1,3]oxazines.
ChemInform Abstract: Experimental and Theoretical Studies of a One‐Flask Synthesis of 3H‐1‐Benzazepines from 2‐Haloanilines and α,β‐Unsaturated Ketones.
Authors: Greer Edyta M. , et al. et al. 
Published: August 2010

AbstractThe reaction is successful starting from 2‐fluoroaniline to afford the target compounds in moderate yields.
ChemInform Abstract: Facile Synthesis of Acyclic Analogues of Carbocyclic Nucleoside as Potential anti‐HIV Pro‐Drug.
Authors: Siddiqui Ibadur R. , Singh Pravin K. , Srivastava Vishal , Singh J. 
Published: August 2010

AbstractA novel, environmentally friendly protocol for the high yielding synthesis of pharmaceutically useful nucleoside analogues (VI) (10 examples) is developed.
ChemInform Abstract: Chemoselective Coupling Reactions of 5,7‐Dimethoxyphthalide with the Remotely Functionalized Alkyl Iodides: Facile Racemic Synthesis of Helicobacter pylori Antibiotics.
Authors: Singh Mandeep , Argade Narshinha P. 
Published: August 2010

AbstractThe synthesis includes various CJ molecules and sporotricale methyl ether (IV).
ChemInform Abstract: Preparation of Single Site Catalysts on Oxides and Metals Prepared via Surface Organometallic Chemistry
Authors: Basset Jean‐Marie , Baudouin Anne , Bayard Francois , Candy Jean‐Pierre , Coperet Christophe , De Mallmann Aimery , Godard Gregory , Kuntz Emile , Lefebvre Frederic , Lucas Christine , et al. et al. 
Published: August 2010

AbstractReview: 136 refs.
ChemInform Abstract: Targeting α‐ versus β‐3 Integrin: Design and Applications of Mono‐ and Multifunctional RGD‐Based Peptides and Semipeptides
Authors: Auzzas L. , Zanardi F. , Battistini L. , Burreddu P. , Carta P. , Rassu G. , Curti C. , Casiraghi G. 
Published: August 2010

AbstractReview: 248 refs.
Rate‐based modelling of reactive absorption of acid gases in an aqueous methyldiethanolamine (MDEA) solution
Authors: Falahat R. , Montazer‐Rahmati M. M. , Bolouri O. 
Published: August 2010

AbstractIn this work different tools for accurate prediction of acid gas absorption are used. At first, simulation of reactive absorption is carried out using the RATEFRAC module of Aspen Plus, which is tested against pilot plant data. The limitations and disadvantages of this module are presented. In order to present a more predictive approach a rate‐based model for the gas scrubbing process is developed. In this model the assumption of thermodynamic equilibrium is considered only at the gas–liquid interphase. Chemical equilibrium among the reacting species in the liquid phase is assumed just for the bulk phase. Mass transfer is modelled using mass transfer coefficients calculated from available correlations which are then improved using an enhancement factor to account for the chemical reactions. The validity of the suggested model is established by comparison of model results with published pilot plant data. The prediction results using the proposed model are improved by around 17% AAD for CO2 and around 7.5% AAD for H2S compared to simulation results using Aspen Plus.
A population‐based competing‐risks analysis of the survival of patients treated with radical cystectomy for bladder cancer
Authors: Lughezzani Giovanni , Sun Maxine , Shariat Shahrokh F. , Budäus Lars , Thuret Rodolphe , Jeldres Claudio , Liberman Daniel , Montorsi Francesco , Perrotte Paul , Karakiewicz Pierre I. 
Published: August 2010

AbstractBACKGROUND.Patients treated with radical cystectomy represent a very heterogeneous group with respect to cancer‐specific and other‐cause mortality. Comorbidities and comorbidity‐associated events represent very important causes of mortality in those individuals. The authors examined the rates of cancer‐specific and other‐cause mortality in a population‐based radical cystectomy cohort.METHODS.The authors identified 11,260 patients treated with radical cystectomy for urothelial carcinoma of the urinary bladder between 1988 and 2006 within 17 Surveillance, Epidemiology, and End Results registries. Patients were stratified into 20 strata according to patient age and tumor stage at radical cystectomy. Smoothed Poisson regression models were fitted to obtain estimates of cancer‐specific and other‐cause mortality rates at specific time points after radical cystectomy.RESULTS.After stratification according to disease stage and patient age, cancer‐specific mortality emerged as the main cause of mortality in all patient strata. Nonetheless, at 5 years after radical cystectomy, between 8.5% and 27.1% of deaths were attributable to other‐cause mortality. The 3 most common causes of other‐cause mortality were other malignancies, heart disease, and chronic obstructive pulmonary disease. The most prominent effect on cancer‐specific mortality was exerted by locally advanced bladder cancer stages. Conversely, age was the main determinant of other‐cause mortality. Interestingly, even after adjusting for bladder cancer pathologic stage, cancer‐specific mortality was higher in older individuals than their younger counterparts.CONCLUSIONS.The current study provides a valuable graphical aid for prediction of cancer‐specific and other‐cause mortality according to disease stage and patient age. It can help clinicians to better stratify the risk‐benefit ratio of radical cystectomy. Hopefully, these findings will be considered in treatment decision making and during informed consent before radical cystectomy. Cancer 2011. © 2010 American Cancer Society.
Ontology mapping: as a binary classification problem
Authors: Mao Ming , Peng Yefei , Spring Michael 
Published: August 2010

AbstractOntology mapping (OM) seeks to find semantic correspondences between similar elements of different ontologies. OM is critical to achieve semantic interoperability in the World Wide Web. To solve the OM problem, this article proposes a non‐instance learning‐based approach that transforms the OM problem into a binary classification problem and utilizes machine learning techniques as a solution. Same as other machine learning‐based approaches, a number of features (i.e. linguistic, structural, and web features) are generated for each mapping candidate. However, in contrast to other learning‐based mapping approaches, the features proposed in our approach are generic and do not rely on the existence and sufficiency of instances. Therefore, our approach can be generalized to different domains without extra training efforts. To evaluate our approach, two experiments (i.e. within‐task vs cross‐task) are implemented and the SVM (support vector machine) algorithm is applied. Experimental results show that our non‐instance learning‐based OM approach performs well on most of OAEI benchmark tests when training and testing on the same mapping task; and the results of approach vary according to the likelihood of training data and testing data when training and testing on different mapping tasks. Copyright © 2010 John Wiley & Sons, Ltd.
Charge Separation in Wurtzite/Zinc‐Blende Heterojunction GaN Nanowires
Authors: Wang Zhiguo , Li Jingbo , Gao Fei , Weber William J. 
Published: August 2010

AbstractThe electronic properties of wurtzite/zinc‐blende (WZ/ZB) heterojunction GaN are investigated using first‐principles methods. A small component of ZB stacking formed along the growth direction in the WZ GaN nanowires does not show a significant effect on the electronic property, whereas a charge separation of electrons and holes occurs along the directions perpendicular to the growth direction in the ZB stacking. The later case provides an efficient way to separate the charge through controlling crystal structure. These results have significant implications for most state of the art excitonic solar cells and the tuning region in tunable laser diodes.
Melanin‐Containing Films: Growth from Dopamine Solutions versus Layer‐by‐Layer Deposition
Authors: Bernsmann Falk , Ersen Ovidiu , Voegel Jean‐Claude , Jan Edward , Kotov Nicholas A. , Ball Vincent 
Published: August 2010

AbstractFilms formed by oxidation of dopamine are of interest for functionalisation of solid–liquid interfaces owing to their versatility. However, the ability to modulate the properties of such films, for example, permeability to ionic species and the absorption coefficient, is urgently needed. Indeed, melanin films produced by oxidation of dopamine absorb strongly over the whole UV/Vis part of the electromagnetic spectrum and are impermeable to anions even for a film thickness as low as a few nanometers. Herein we combine oxidation of dopamine to produce a solution containing dopamine–melanin particles and their alternating deposition with poly(diallyldimethylammonium chloride) to produce films which have nearly the same morphology as pure dopamine–melanin films but are less compact, more transparent and more permeable to ferrocyanide anions.
Preliminary validation of an ultra‐brief version of the Penn State Worry Questionnaire
Authors: Berle David , Starcevic Vladan , Moses Karen , Hannan Anthony , Milicevic Denise , Sammut Peter 
Published: August 2010

AbstractThe Penn State Worry Questionnaire (PSWQ) is widely regarded as the gold standard self‐report questionnaire for pathological worry. However, the factorial structure of the scale remains contentious. We sought to determine whether a psychometrically sound brief version of the PSWQ, which avoids contentious items and yet incorporates the essential features of pathological worry, could be derived from the existing PSWQ item pool. After inspecting items of the PSWQ and the findings of previous factor analytic studies, three items were selected that capture the essence of pathological worry (i.e., high frequency, perceived uncontrollability and multiple domains of worry), according to the Diagnostic and Statistical Manual of Mental Disorders (Fourth Edition). We then compared the psychometric properties of the 3‐item PSWQ with the full PSWQ in a sample of 225 clients attending an anxiety disorders clinic. Despite its brevity, the 3‐item PSWQ had internal consistency comparable with that of the standard PSWQ, and performed equally well with regards to convergent and discriminant validity, in screening for a generalized anxiety disorder diagnosis and in detecting change with treatment. The 3‐item ultra‐brief version of the PSWQ is quick to administer, simple to score and possesses psychometric properties very similar to the 16‐item version. Further research should confirm the psychometric properties of the 3‐item version when administered independently of the other items and assess the scale's test–retest reliability. Copyright © 2010 John Wiley & Sons, Ltd.Key Practitioner Message:• The 3‐item version of the Penn State Worry Questionnaire (PSWQ) captures the essence of pathological worry, as defined by the Diagnostic and Statistical Manual of Mental Health Disorders (Fourth Edition).• The 3‐item version of the PSWQ appears to have similar psychometric properties to the full, 16‐item version, and is therefore a good measure of pathological worry.• The 3‐item PSWQ is quick to administer in time‐pressured clinical settings.• The 3‐item PSWQ is simple to score and does not include reverse‐keyed items.
EDTA‐assisted synthesis of rose‐like ZnO architectures
Authors: Li Zhen , Fang Yaoguo , Peng Liwei , Pan Dengyu , Wu Minghong 
Published: August 2010

AbstractRose‐like ZnO nanostructures were prepared by a low‐temperature solution route with assistance of ethylenediaminetetraacetic acid disodium (EDTA‐2Na). The morphology of ZnO nanostructures was found to change from nanowire arrays to rose‐ and tower‐like architectures with increasing the molar ratio of EDTA‐2Na/Zn2+. Also, the shape evolution of ZnO nanostructures with time was observed from flat nanosheets to wrinkled nanosheets and to rose‐like nanostructures. EDTA‐2Na as a strong complexing agent was found to play a key role in the shape evolution. Photoluminescence spectra show that the rose‐like ZnO architectures have more defects than the nanowire arrays. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
[cis‐(1,3‐Diene)2W(CO)2] Complexes as MOCVD Precursors for the Deposition of Thin Tungsten – Tungsten Carbide Films
Authors: Jipa Ilona , Heinemann Frank W. , Schneider Andreas , Popovska Nadejda , Siddiqi M. Aslam , Siddiqui Rehan A. , Atakan Burak , Marbach Hubertus , Papp Christian , Steinrück Hans‐Peter , Zenneck Ulrich 
Published: August 2010

AbstractTungsten ‐ tungsten carbide thin films are deposited by metal‐organic (MO)CVD on silica‐coated silicon wafers using [cis‐(1,3‐butadiene)2W(CO)2] and [cis‐(1,3‐cyclohexadiene)2W(CO)2], respectively, as tunable precursor complexes. The compounds are prepared through photochemical ligand exchange reactions from [W(CO)6] and fully characterized, including X‐ray structure determination and detailed differential thermal analysis (DTA)/thermogravimetry (TG) investigations. Gas‐phase diffusion coefficients and the vapor pressure of the compounds are calculated. The MOCVD experiments are performed in a vertical cold‐wall reactor and the exhaust gas is analyzed by gas chromatography (GC). X‐ray photoelectron spectroscopy (XPS), X‐ray diffraction (XRD), atomic force microscopy (AFM), and scanning electron microscopy (SEM) measurements are utilized for film characterization. Consequences of the high oxophilicity of freshly formed tungsten surfaces, consecutive surface reactions of the complex ligands, film growth, and film properties are discussed. Inside the layers, tungsten carbide is identified as the main component.
Sox14 is required for transcriptional and developmental responses to 20‐hydroxyecdysone at the onset of drosophila metamorphosis
Authors: Ritter Amanda R. , Beckstead Robert B. 
Published: August 2010

AbstractThe steroid hormone 20‐hydroxyecdysone (20E), by means of a heterodimer consisting of two nuclear receptors, the Ecdysone receptor (EcR) and Ultraspiracle (Usp), triggers the major developmental transitions in the Drosophila life cycle through the regulation of genetic hierarchies. We have previously demonstrated that the Sox14 transcription factor is a primary response gene to 20E/EcR/Usp complex. In this study, we show that mutations in sox14 result in prepupal and pupal lethality with animals displaying a multitude of defects in 20E developmentally regulated pathways. In addition, through Northern blot and microarray analyses of sox14 mutant animals, we demonstrate that Sox14 is required for the proper expression of 20E‐ and non–20E‐regulated genes at the onset of metamorphosis. We also show that the Sox14‐regulated gene set correlates well with Sox14 expression in a variety of larval and adult tissues. Thus, Sox14 is a critical transcription factor required for 20E signaling at the onset of metamorphosis. Developmental Dynamics 239:2685–2694, 2010. © 2010 Wiley‐Liss, Inc.
Antimicrobial properties of 1‐monoacylglycerols prepared from undecanoic (C11:0) and undecenoic (C11:1) acid
Authors: Doležalová Magda , Janiš Rahula , Svobodová Hana , Kašpárková Věra , Humpolíček Petr , Krejčí Jiří 
Published: August 2010

AbstractAntimicrobial activity of monoacylglycerols (MAG) with odd number of carbons prepared from undecanoic (MAG C11:0) and undecenoic (MAG C11:1) was investigated. Data showed that both studied substances successfully inhibited Gram‐positive cocci (Staphylococcus aureus) and spore‐forming rods (Bacillus cereus). Gram‐negative bacteria were highly resistant against MAG C11:0 and showed considerable tolerance against MAG C11:1. Minimum inhibitory concentration (MIC) of MAG C11:1 was possible to determine for Escherichia coli only. Complete inhibition of three fungi genera (Alternaria, Cladosporium, Trichothecium) was achieved using MAG C11:1 with a concentration higher than 750 µg/mL. The growth of Aspergillus niger, Mucor racemosus, Phoma, Scopulariopsis, Trichoderma was significantly reduced. Generally, MAG C11:1 was more efficient than MAG C11:0 against all tested microorganisms. Due to a rich production of degradation enzymes, some fungi species surprisingly adapted their metabolism during growth and were even able to utilise tested MAG as a source of carbon.Practical applications: MAG composed of fatty acids with odd number of carbons in molecule are a promising group of substances applicable in food industry and cosmetics. They represent materials with broad spectrum of antimicrobial activity, especially against Gram‐positive bacteria. More efficient MAG C11:1 with a double bond in molecule can be recommended for reduction of S. aureus that cause food enterotoxicosis.
A Novel Approach to the Evaluation of the Importance of Steric and Electronic Effects in SNAr Reactions: A Computational, Thermodynamic and 1H and 13C NMR Study of “Meisenheimer‐Type” Adducts in the Benzo[b]thiophene Series
Authors: Consiglio Giovanni , Cosimelli Barbara , Guernelli Susanna , Lanza Camilla Zaira , Sancassan Fernando , Spinelli Domenico , Stenta Marco 
Published: August 2010

AbstractThe synthetically useful nucleophilic attack on nitrobenzo[b]thiophenes, a starting point for ring‐opening/ring‐closure pathways to different heterocyclic systems, has been investigated in detail. 3‐Nitrobenzo[b]thiophene (9) and 2‐nitrobenzo[b]thiophene (10) react with sodium methoxide in either DMSO or methanol to give the relevant “Meisenheimer‐type” adducts 9′ and 10′, identified by NMR spectroscopy. A UV study indicated that the equilibrium constants for the formation of 9′ at 293 K are 10.1 and 40 700 L mol–1 in methanol and in DMSO, respectively. Competition reactions showed that the stability constant of 10′ is lower than that of 9′: accordingly, DFT [B3LYP/6‐31+G(d,p)] calculations indicate that the formation of 9′ is thermodynamically more favoured than that of 10′ both in the gas phase and in DMSO. The reason for the opposite sequence in the stability constants previously found for the corresponding gem‐dimethoxy Meisenheimer adducts 7′ and 8′ was therefore investigated in depth and appears to be a consequence of different steric interactions in the starting compounds, 2‐methoxy‐3‐nitro‐(7) and 3‐methoxy‐2‐nitrobenzo[b]thiophene (8), respectively. A study of 13C NMR chemical shift changes accompanying the formation of adducts 9′ and 10′ confirms that the formation of the adduct exhibiting the larger stability constant is accompanied by a smaller π electron density redistribution, as we have previously found in other cases all governed by electronic effects. The opposite behaviour is observed in the formation of the gem‐dimethoxy adducts 7′ and 8′, which is a consequence of the predominance of steric effects. Further outcomes of more general interest deal with the aromatic character of benzo[b]thiophenes. NMR spectroscopic data and calculated bond lengths show that in the studied reactions the benzene ring, unlike the thiophene one, is scarcely affected by methoxide addition, retaining its nearly “full” aromatic character. Benzocondensation increases the stability constants of σ‐adducts mainly because of a marked reduction in the aromatic character of the thiophene ring in the substrates.
Photooxidation of Dithiaethyneporphyrin
Authors: Berlicka Anna , Latos‐Grażyński Lechosław , Szterenberg Ludmiła , Pawlicki Miłosz 
Published: August 2010

AbstractThe oxidative degradation of the contracted carbaporphyrinoid 3,8,13,18‐tetraphenyldithiaethyneporphyrin, which contains an acetylene moiety embedded in the macrocyclic framework, was investigated. The light‐induced, regioselective cleavage of the macrocyclic ring was observed during exposure to dioxygen affording four open‐chain diastereomers terminated by carbonyl groups. Studies on the regioselectivity of the process showed that the thiophene was cleft together with the 8‐aryl substituent, which proved the primary attack of dioxygen at the C8–C9 bond. Diastereomers {4Z,10E}, {4Z,10Z}, {4E,10E}, and {4E,10Z} [the arrangement with respect to C4–C5 and C10···C13 conjugated bonds given] differ by the orientation of the terminal pyrrolone unit with respect to the 5‐phenyl substituent and by the geometry around the cumulene fragment. Thermal {4Z,10E}–{4Z,10Z} and {4E,10E}–{4E,10Z} isomerization was detected and was confirmed by exchange cross‐peaks in the ROESY map. The molecular structures of the {4Z,10E} and {4E,10E} stereoisomers were established by X‐ray analysis. Density functional theory (DFT) was applied to model the molecular and electronic structure of {4Z,10E}, {4Z,10Z}, {4E,10E}, and {4E,10Z}. The very small energy difference observed between suitable diastereomers accounts for their coexistence in solution (0.48 kcal/mol for {4Z,10E}, {4Z,10Z}; 0.63 kcal/mol for {4E,10E}, {4E,10Z}).