bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: A Green Procedure for the Regio‐ and Chemoselective Hydrophosphonylation of Unsaturated Systems Using CaO under Solventless Conditions.
Authors: Martinez‐Castro Elisa , Lopez Oscar , Maya Ines , Fernandez‐Bolanos Jose G. , Petrini Marino 
Published: November 2010

AbstractDiethyl phosphite (II) and diphenylphosphine add to a series of unsaturated derivatives using CaO as basic promoter under solventless conditions.
ChemInform Abstract: Chiral N,N′‐Dioxide‐Yb(III) Complexes Catalyzed Enantioselective Hydrophosphonylation of Aldehydes.
Authors: Chen Weiliang , Hui Yonghai , Zhou Xin , Jiang Jun , Cai Yunfei , Liu Xiaohua , Lin Lili , Feng Xiaoming 
Published: November 2010

AbstractThe addition of small amounts of pyridine to the reaction mixture promotes both reactivity and enantioselectivity.
ChemInform Abstract: Solvent‐ and Catalyst‐Free Reaction of (Aminomethyl)phosphonates with Epoxides: Synthesis of Novel {[(2‐Hydroxyethyl)amino]methyl}phosphonates.
Authors: Kaboudin Babak , Sorbiun Mina 
Published: November 2010

AbstractRing opening of epoxides (II) with (aminomethyl)phosphonates (I) occurs at the sterically less hindered position on the epoxide to afford the title compounds (III) in moderate to good yields.
ChemInform Abstract: Organic Dyes with Remarkably High Absorptivity; All Solid‐State Dye Sensitized Solar Cell and Role of Fluorine Substitution.
Authors: Chou Pi‐Tai , et al. et al. 
Published: November 2010

AbstractNew organic dyes are synthesized, among which compound (IIb) having a fluorine substitution attains excellent all solid‐state DSSC performance.
ChemInform Abstract: Ansellone A (I), a Sesterterpenoid Isolated from the Nudibranch Cadlina luteromarginata and the Sponge Phorbas sp., Activates the cAMP Signaling Pathway.
Authors: Daoust Julie , Fontana Angelo , Merchant Catherine E. , de Voogd Nicole J. , Patrick Brian O. , Kieffer Timothy J. , Andersen Raymond J. 
Published: November 2010

AbstractIn connection with the investigations, the absolute configuration of alotaketal A is revised to its enantiomeric structure (II).
ChemInform Abstract: H2SO4—SiO2: Highly Efficient and Novel Catalyst for the Ferrier‐Type Glycosylation.
Authors: Zhou Jia Fen , Chen Xuan , Wang Qing Bing , Zhang Bo , Zhang Li Yan , Yusulf Abdullah , Wang Zhong Fu , Zhang Jian Bo , Tang Jie 
Published: November 2010

AbstractThe reaction of glucal (I) with alcohols affords 2,3‐unsaturated glucopyranosides in high yield and α‐selectivity.
ChemInform Abstract: Synthesis of (.+‐.)‐Diospongin A: A Hetero‐Diels—Alder and C‐Glycosylation Approach.
Authors: More Jesse D. 
Published: November 2010

AbstractThe stereoselective synthesis of title compound (VII) is based on the Diels—Alder reaction catalyzed by ACC and a final anchimeric assistance‐controlled C‐glycosylation of the acetate (V).
ChemInform Abstract: Antimelanogenic Fatty Acid Derivatives from the Tuber‐Barks of Colocasia antiquorum var. esculenta.
Authors: Kim Ki Hyun , Moon Eunjung , Kim Sun Yeou , Lee Kang Ro 
Published: November 2010

Abstractisolation and antimelanogenic activity of new monoglyceride (S)‐(I) and nine known fatty acid derivatives
A context‐aware semantic similarity model for ontology environments
Authors: Dong Hai , Hussain Farookh Khadeer , Chang Elizabeth 
Published: November 2010

AbstractWhile many researchers have contributed to the field of semantic similarity models so far, we find that most of the models are designed for the semantic network environment. When applying the semantic similarity model within the semantic‐rich ontology environment, two issues are observed: (1) most of the models ignore the context of ontology concepts and (2) most of the models ignore the context of relations. Therefore, in this paper, we present a solution for the two issues, including a novel ontology conversion process and a context‐aware semantic similarity model, by considering the factors of both the context of concepts and relations, and the ontology structure. Furthermore, in order to evaluate this model, we compare its performance with that of several existing models' performance in a large‐scale knowledge base, and the evaluation result preliminarily proves the technical advantage of our model in ontology environments. Conclusions and future works are described in the final section. Copyright © 2010 John Wiley & Sons, Ltd.
Synthesis and Photocatalytic Activity of Perovskite Niobium Oxynitrides with Wide Visible‐Light Absorption Bands
Authors: Siritanaratkul Bhavin , Maeda Kazuhiko , Hisatomi Takashi , Domen Kazunari 
Published: November 2010

AbstractPhotocatalytic activities of perovskite‐type niobium oxynitrides (CaNbO2N, SrNbO2N, BaNbO2N, and LaNbON2) were examined for hydrogen and oxygen evolution from water under visible‐light irradiation. These niobium oxynitrides were prepared by heating the corresponding oxide precursors, which were synthesized using the polymerized complex method, for 15 h under a flow of ammonia. They possess visible‐light absorption bands between 600–750 nm, depending on the A‐site cations in the structures. The oxynitride CaNbO2N, was found to be active for hydrogen and oxygen evolution from methanol and aqueous AgNO3, respectively, even under irradiation by light at long wavelengths (λ<560 nm). The nitridation temperature dependence of CaNbO2N was investigated and 1023 K was found to be the optimal temperature. At lower temperatures, the oxynitride phase is not adequately produced, whereas higher temperatures produce more reduced niobium species (e. g., Nb3+ and Nb4+), which can act as electron‐hole recombination centers, resulting in a decrease in activity.
Irxl1 mutant mice show reduced tendon differentiation and no patterning defects in musculoskeletal system development
Authors: Kimura Wataru , Machii Masashi , Xue XiaoDong , Sultana Nishat , Hikosaka Keisuke , Sharkar Mohammad T.K. , Uezato Tadayoshi , Matsuda Masashi , Koseki Haruhiko , Miura Naoyuki 
Published: November 2010

AbstractSummary:Irxl1 (Iroquois‐related homeobox like‐1) is a newly identified three amino‐acid loop extension (TALE) homeobox gene, which is expressed in various mesoderm‐derived tissues, particularly in the progenitors of the musculoskeletal system. To analyze the roles of Irxl1 during embryonic development, we generated mice carrying a null allele of Irxl1. Mice homozygous for the targeted allele were viable, fertile, and showed reduced tendon differentiation. Skeletal morphology and skeletal muscle weight in Irxl1‐knockout mice appeared normal. Expression patterns of several marker genes for cartilage, tendon, and muscle progenitors in homozygous mutant embryos were unchanged. These results suggest that Irxl1 is required for the tendon differentiation but dispensable for the patterning of the musculoskeletal system in development. genesis, 2011. © 2010 Wiley‐Liss, Inc.
A communication aid and computer input system using only the human eye
Authors: Arai Kohei , Yajima Kenro 
Published: November 2010

AbstractA communication aid using only the human eye is proposed. A set of candidate characters is displayed on a relatively small computer screen and a light head‐mounted display (HMD) that is attached to glasses worn by the user. When the user looks at a candidate character with the left eye, an image of the right eye is taken with a small and light web camera that also is mounted on the glasses. The proposed system can select one character out of 81 characters, with two layers of 9 by 9 character candidate screen images. There is also another selection image including control keys and frequently used sentences. By using image matching between a previously acquired template image for each candidate character and the currently acquired image, the proposed system can determine which of the candidate characters has been selected. By the combined use of blinking and fixed gaze, the proposed system can determine the user‐selected key among the candidates. The blink detection method employs a morphologic filter to avoid erroneous pupil detection due to eyebrows and shadows. Thus the user can input sentences. The user can also edit the sentences, which are then read by a text‐to‐speech (TTS) software tool. Thus the system helps handicapped and disabled persons without voice to communicate with others, because the only function required for conversation is the human eye. In addition, the proposed system can be used as an input system for wearable computing systems. Test results obtained with 6 nondisabled persons showed that the proposed system worked at an acceptable speed of about 1.5 second per character. © 2010 Wiley Periodicals, Inc. Electron Comm Jpn, 93(12): 1–9, 2010; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.10317
Effect of Temperature on the Catalytic Ability of Electrochemically Active Biofilm as Anode Catalyst in Microbial Fuel Cells
Authors: Liu Ying , Climent Victor , Berná Antonio , Feliu Juan Miguel 
Published: November 2010

AbstractIn this study we report the effect of temperature on the catalytic ability of an electrochemically active biofilm based on mixed‐culture to oxidize acetate and found the optimum temperature showing maximal catalytic activity and power output. Electrochemical characterization of biofilm and power output and internal resistance of microbial fuel cell (MFC) have been investigated at different temperatures. When temperature increased from 30 to 45 °C the catalytic ability of biofilms to oxidize acetate increased following the Arrhenius law with apparent activation energy of 44.85 kJ/mol. At temperatures higher than 48 °C, however, the bioelectrocatalytic current decreased. At 53 °C the bacterial metabolism was in inactivation. The optimum working temperature of the biofilm was 45 °C, producing current of 1339 µA cm−2. This current was almost three times higher than 527 µA cm−2 at 30 °C. The MFC performance at different temperatures showed consistent temperature dependence to that of a semi‐batch cell, which implies that anode catalytic ability in MFC is the main limit factor for increasing power output. A maximum power output of 1065 mW m−2 was also observed at 45 °C and it was 1.5 times higher than 764 mW m−2 at 30 °C. The increased MFC performance from 30 °C to 45 °C is lower in comparison with about three times higher increase in semi‐batch cells. This could be due to other factors such as proton migration rate in membrane of MFC, which can be seen from that the internal resistance value of 121.5 Ω in the MFC at 45 °C was only slightly lower than 177.6 Ω at 30 °C. Also, some other factors such as cell configuration which would limit the power output and can be further optimized. This work contributes to the study of influence from temperature on anodic electrochemically active biofilm activity and their subsequent influence on MFC performance and reports the optimal temperature for biofilm activity based on mixed‐culture.
Viable tumor in postchemoradiation neck dissection specimens as an indicator of poor outcome
Authors: Ganly Ian , Bocker Jennifer , Carlson Diane L. , D'Arpa Salvatore , Coleman Maria , Lee Nancy , Pfister David G. , Shah Jatin P. , Patel Snehal G. 
Published: November 2010

AbstractBackgroundThe objective of this study was to determine the prognostic significance of viable tumor in postchemoradiation neck dissection specimens in patients with squamous cell carcinoma of the laryngopharynx.MethodsRetrospective analysis identified 181 patients treated with primary concurrent chemoradiation for carcinoma of the laryngopharynx at Memorial Sloan‐Kettering Cancer Center between the years 1995 and 2005. Of these, 56 patients had a comprehensive neck dissection either as a planned or salvage procedure. Neck dissection specimens were analyzed by a single pathologist for the presence of viable tumor. The presence of viable tumor was correlated to the timing of neck dissection after chemoradiation and to tumor response. Overall survival (OS), disease‐specific survival (DSS), and recurrence‐free survival (RFS) were determined by the Kaplan–Meier method, and correlation to tumor viability was determined with the log‐rank test.ResultsNineteen (33%) patients had viable tumor in their neck dissection specimens. Viable tumor was higher in patients who had a less‐than‐complete response to chemoradiation compared with those who had a complete response (42% vs 25%, p = .1). There was no correlation to timing of neck dissection. The 5‐year OS, DSS, and RFS were significantly lower in patients who had viable tumor in their neck dissection specimens (OS 49% vs 93%, p = .0005; DSS 56% versus 93%, p = .003; RFS 40% vs 75%, p = .004).ConclusionsPatients with viable tumor in postchemoradiation neck dissection specimens had a poorer outcome compared with patients with no viable tumor. © 2010 Wiley Periodicals, Inc. Head Neck, 2010
Chitosan‐poly(ε‐caprolactone)‐poly(ethylene glycol) graft copolymers: Synthesis, self‐assembly, and drug release behavior
Authors: Chen Chen , Cai Guoqiang , Zhang Haiwen , Jiang Hongliang , Wang Liqun 
Published: November 2010

AbstractBiodegradable tri‐component graft copolymers, chitosan‐poly(ε‐caprolactone)‐poly(ethylene glycol) (CPP), were synthesized via a mild route, using sodium dodecyl sulfate‐chitosan complex (SCC) as a precursor. Both PCL and PEG could be conveniently conjugated to the hydroxyl sites of chitosan without the need of tedious chemical protection/deprotection processes, thereby leaving the amino groups of chitosan intact. The self‐assembly and release behavior of the copolymer micelles were investigated. Paclitaxel and rutin were used as model drugs. Spherical micelles could be formed through self‐assembly of CPP in aqueous media. The micelle diameter increased with PEGylation degree and ranged from 30 to 45 nm. The incorporation of drugs into the micelles significantly raised the micelle diameter and diversified the micelle morphologies. The micelles were further subjected to glutaraldehyde treatment to prolong the release of the incorporated drugs. It was found that the crosslinking process shrunk the drug‐loaded micelles. In addition, the micelles were endowed with self‐luminescent properties after crosslinked with glutaraldehyde. By increasing crosslinking density, the release duration of the model drugs could be prolonged. © 2010 Wiley Periodicals, Inc. J Biomed Mater Res Part A, 2010.
Carbon dioxide flux in the centre of Łódź, Poland—analysis of a 2‐year eddy covariance measurement data set
Authors: Pawlak Włodzimierz , Fortuniak Krzysztof , Siedlecki Mariusz 
Published: November 2010

AbstractContinuous measurements of carbon dioxide turbulent flux F carried out with the eddy covariance method have been made in Łódź since F July 2006. The measurement point (Lipowa Station) is located in the west part of the densely built‐up city centre, where artificial surfaces clearly prevail over natural terrain. The measurement system includes a Kipp and Zonen's (Delft, Holland) CNR1 net radiometer, RMYoung (Traverse City, Michigamn, USA) 81000 sonic anemometer and Li‐cor (Lincoln, Nebraska, USA) 7500 open path H2O/CO2 infrared gas analyser. Sensors are installed on the high tower 20 m above the roof of the building and 37 m above the ground, so the measurement height exceeded the urban canopy layer more than twice. The diurnal and annual variability of carbon dioxide flux for the period July 2006 to August 2008 is analysed in the article. The results show the characteristic features in diurnal and annual courses of F. Independently from the season, positive (upward) fluxes of the order of 0–15 µmol m−2 s−1 prevail in the data. During the cold season, an increase in turbulent CO2 exchange is observed (F quite often exceeded 30 µmol m−2 s−1). This can be attributed to anthropogenic CO2 emissions, which are particularly strong in winter due to, among other things, mineral fuel combustion during domestic heating. The average monthly fluxes are positive in all seasons, which means that emission of CO2 in the surroundings of the measurement point prevails over its uptake. Apart from the season, the maximum flux occurred during the day and the minimum during the second part of the night. Wintertime monthly averaged fluxes are much higher than summertime ones. The observed increase in CO2 exchange during weekdays in comparison with weekends can be caused by the weekly rhythm of traffic in the surroundings of Lipowa Station. Copyright © 2010 Royal Meteorological Society
Do satisfied customers bad‐mouth innovative products?
Authors: Parthasarathy Madhavan , Forlani David 
Published: November 2010

AbstractFor many years marketing academics have recommended, and practitioners have implemented, organization‐wide programs that measure customers' levels of satisfaction with a firm's offerings because it is believed that satisfied customers are both more likely to continue using a previously adopted product and less likely to engage in negative word‐of‐mouth communication. Given the ubiquity of product‐review forums resulting from today's increasing levels of e‐commerce, this paper pairs cause constructs from the diffusion literature with effect constructs from the satisfaction and services literatures to reconsider that perspective. Specifically, it examines the relationships bet‐ween six perceived innovation attributes known to influence a new product's diffusion process and two post‐adoption behaviors, satisfaction and negative word‐of‐mouth communication. The results quash previous assumptions that satisfaction mediates negative word‐of‐mouth communication and reveal that satisfied customers do speak ill of previously adopted products. Implications for both theory and practice are also presented. © 2010 Wiley Periodicals, Inc.
Mn‐bicine: A low affinity chelate for manganese ion enhanced MRI
Authors: Seo Yoshiteru , Satoh Keitaro , Watanabe Kazuto , Morita Hironobu , Takamata Akira , Ogino Takashi , Murakami Masataka 
Published: November 2010

AbstractThe toxicity of free Mn2+ is a bottleneck for the in vivo application of manganese ion enhanced MRI. To reduce free Mn2+ concentration ([Mn2+]), a low affinity chelate reagent: N,N‐bis(2‐hydroxyethyl)glycine (bicine) was used. Considering the conditional association constant of Mn‐bicine at pH 7.4 (102.9 M−1), (i) a 100 mM Mn‐bicine solution should contain about 10 mM of free manganese ion, but (ii) free manganese will make up 3/4 of the final plasma concentration (0.5 mM) with an intravenous infusion of 100 mM Mn‐bicine. The T1 relaxivity of Mn‐bicine in a 5 mM Mn‐bicine solution was estimated as 5 mM−1 sec−1 at 24°C, 7 T in a pH range of 6.8–7.5. Mn‐bicine demonstrated a tendency for better contractility when employed with an isolated perfused frog heart, compared with MnCl2. A venous infusion of 100 mM Mn‐bicine (8.3 μmol kg−1 min−1) showed a minimal decrease and maintained a constant heart rate level and arterial pressure in rats, while rats infused with 100 mM of MnCl2 showed a significant suppression of the hemodynamic functions. Thus, Mn‐bicine appears to be a better choice for maintaining the vital conditions of experimental animals, and may improve the reproducibility of manganese ion enhanced MRI. Magn Reson Med, 2010. © 2010 Wiley‐Liss, Inc.
Catalytic activation of histone acetyltransferase Rtt109 by a histone chaperone
Authors: Kolonko Erin M. , Albaugh Brittany N. , Lindner Scott E. , Chen Yuanyuan , Satyshur Kenneth A. , Arnold Kevin M. , Kaufman Paul D. , Keck James L. , Denu John M. 
Published: November 2010

Most histone acetyltransferases (HATs) function as multisubunit complexes in which accessory proteins regulate substrate specificity and catalytic efficiency. Rtt109 is a particularly interesting example of a HAT whose specificity and catalytic activity require association with either of two histone chaperones, Vps75 or Asf1. Here, we utilize biochemical, structural, and genetic analyses to provide the detailed molecular mechanism for activation of a HAT (Rtt109) by its activating subunit Vps75. The rate-determining step of the activated complex is the transfer of the acetyl group from acetyl CoA to the acceptor lysine residue. Vps75 stimulates catalysis (> 250-fold), not by contributing a catalytic base, but by stabilizing the catalytically active conformation of Rtt109. To provide structural insight into the functional complex, we produced a molecular model of Rtt109-Vps75 based on X-ray diffraction of crystals of the complex. This model reveals distinct negative electrostatic surfaces on an Rtt109 molecule that interface with complementary electropositive ends of a symmetrical Vps75 dimer. Rtt109 variants with interface point substitutions lack the ability to be fully activated by Vps75, and one such variant displayed impaired Vps75-dependent histone acetylation functions in yeast, yet these variants showed no adverse effect on Asf1-dependent Rtt109 activities in vitro and in vivo. Finally, we provide evidence for a molecular model in which a 1∶2 complex of Rtt109-Vps75 acetylates a heterodimer of H3-H4. The activation mechanism of Rtt109-Vps75 provides a valuable framework for understanding the molecular regulation of HATs within multisubunit complexes.
Match activities of top‐class female soccer assistant referees in relation to the offside line
Authors: Mallo Javier , Cala Antonio , González Frutos Pablo , Navarro Enrique 
Published: November 2010

AbstractThe aim of this study was to examine the match activities of top‐class female assistant referees (mean age 34.8 years, s=3.5; stature 1.64 m, s=0.05; weight 58.1 kg, s=7.4; body mass index 21.6 kg · m–2, s=2.4) in relation to the offside line. Computerized match analyses were performed on 14 top‐class assistant referees during 10 matches (a total of 20 observations) from the 2006 Fédération Internationale de Football Association (FIFA) under‐20 Women's World Championship held in Russia. In addition, the position of the second last defensive player of both teams was calculated throughout the matches to determine the distance from the assistant referee to the offside line. The total distance covered during a game was 5594 m (s=473), of which 27% was sideways movements (1492 m, s=135). High‐intensity activities (>13 km · h–1) accounted for 1999 m (s=371). Mean distance from the offside line during the entire match was 1.06 m (s=0.26). Total distance covered, high‐intensity activities, and distance from the offside line were not different (P>0.05) between the two halves of the game or consecutive 15‐min match periods. Our results show that: (1) the kinematic demands placed on top‐class female assistant referees are similar to those of top‐class male assistant refereeing except for the amount of high‐intensity activities, and (2) assistant referees were able to maintain the distance from the offside line during the match, which suggests an ability to keep up with the pace of the play throughout the match.