bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Synthesis of Dihydrothienopyridine Derivatives Fused with Triazole Rings.
Authors: Abranyi‐Balogh Peter , Milen Matyas , Dancso Andras , Frigyes David , Pongo Laszlo , Keglevich Gyoergy 
Published: August 2013

AbstractThe title compounds are obtained by reaction of 4‐(methylsulfanyl)‐6,7‐dihydrothieno[3,2‐c]pyridine with acid hydrazides.
ChemInform Abstract: Highly Fluorescent, π‐Extended Indenopyrido[2,1‐a]isoindolone Derivatives Prepared by a Palladium‐Catalyzed Cascade Reaction.
Authors: Chamas Zein el abidine , Marchi Enrico , Modelli Alberto , Fort Yves , Ceroni Paola , Mamane Victor 
Published: August 2013

AbstractA new series of the title compounds is prepared and the photophysical properties in CH2Cl2 are determined.
ChemInform Abstract: Synthesis of Indolizines and Heterocyclic Chalcones Catalyzed by Supported Copper Nanoparticles.
Authors: Albaladejo Maria Jose , Alonso Francisco , Yus Miguel 
Published: August 2013

AbstractThe authors describe the synthesis of different substituted indolizine derivatives via a multicomponent reaction and the synthesis of heterocyclic chalcones with the same starting materials but without addition of a solvent.
ChemInform Abstract: Reaction of 1,2‐Dialkyldiaziridines and 1,2,3‐Trialkyldiaziridines with Methyl Propiolate in Ionic Liquids and in Organic Solvents.
Authors: Petukhova Vera Yu. , Fershtat Leonid L. , Kachala Vadim V. , Kuznetsov Vladimir V. , Khakimov Dmitriy V. , Pivina Tatyana S. , Makhova Nina N. 
Published: August 2013

AbstractThe reaction of diaziridines of type (I) with methyl propiolate (II) is studied.
ChemInform Abstract: Novel 3‐(2‐Oxo‐2H‐benzo[b][1,4]oxazin‐3‐yl)propanoates from Dimethyl 2‐Oxoglutarate and Test of Their Biological Activity.
Authors: Hachama Kamel , Khodja Mohamed , Moulay Saad , Boutoumi Hocine , Hennig Lothar , Sicker Dieter 
Published: August 2013

AbstractThe title compounds (III) are obtained from 2‐aminophenols and dimethyl 2‐oxoglutarate under mild reaction conditions.
ChemInform Abstract: Ring Expansions within the Gold‐Catalyzed Cycloisomerization of O‐Tethered 1,6‐Enynes. Application to the Synthesis of Natural‐Product‐Like Macrocycles.
Authors: Simonneau Antoine , Harrak Youssef , Jeanne‐Julien Louis , Lemiere Gilles , Mouries‐Mansuy Virginie , Goddard Jean‐Philippe , Malacria Max , Fensterbank Louis 
Published: August 2013

AbstractThe gold‐catalyzed cycloisomerization of O‐tethered 1,6‐enynes proceeds via a small‐sized ring expansion leading to the tricyclic compounds that contain a substituted dihydropyran moiety.
ChemInform Abstract: The Unexpected and Facile Molybdenum Mediated Formation of Tri‐ and Tetracyclic Pentathiepins from Pyrazine‐Alkynes and Sulfur.
Authors: Zubair Muhammad , Ghosh Ashta Chandra , Schulzke Carola 
Published: August 2013

AbstractTitle compounds (II) and (IV) are formed by the reaction of alkynyl‐substituted heterocyclic precursors (I) and (III) with elemental sulfur in the presence of molybdenum oxo bis‐tetrasulfide.
ChemInform Abstract: 3,5‐Bis(arylidene)piperid‐4‐ones Containing 1,3,2‐Oxazaphosphorinane Moieties: Synthesis and Antitumor Activity.
Authors: Shipov Anatolii E. , Makarov Mikhail V. , Petrovskii Pavel V. , Rybalkina Ekaterina Yu. , Nelyubina Yulia V. , Odinets Irina L. 
Published: August 2013

AbstractIntroduction of oxaphosphorinane moieties into the backbone of the title piperidones results in compounds possessing high antitumor properties toward human carcinoma cell lines.
ChemInform Abstract: Dioxirane Oxidation of 2‐Aryl‐1‐vinyl‐1,1‐diphosphane Dioxide: A Convenient Approach for the Synthesis of Novel 1,2‐Epoxy‐2‐aryl Ethylgembisphosphonates.
Authors: Fotsing Marthe Carine Djuidje , Coville Neil , Mbianda Xavier Yangkou 
Published: August 2013

AbstractThe title compounds (IV) are obtained by direct epoxidation of 2‐arylvinyl‐1,1‐diphosphonate derivatives (III) with ethyl methyl dioxirane, generated in situ from potassium hydrogen monopersulfate and butanone in a phase transfer system.
ChemInform Abstract: Enantioselective Synthesis of α‐Amino‐γ‐sulfonyl Phosphonates with a Tetrasubstituted Chiral α‐Carbon via Quinine‐Squaramide‐Catalyzed Michael Addition of Nitrophosphonates to Vinyl Sulfones.
Authors: Bera Kalisankar , Namboothiri Irishi N. N. 
Published: August 2013

AbstractTitle compounds (III) and (V) are suitable precursors for the synthesis of amino‐sulfonyl phosphonates such as (VII), which in turn is amenable for alkylation in α‐position to the sulfonyl group.
ChemInform Abstract: Non‐Pd Transition Metal‐Catalyzed Hydrostannations: Bu3SnF/PMHS as an Tin Hydride Source.
Authors: Maleczka Robert E. Jr. , Ghosh Banibrata , Gallagher William P. , Baker Aaron J. , Muchnij Jill A. , Szymanski Amy L. 
Published: August 2013

AbstractThis describes an effective in situ source of Bu3SnH for hydrostannations of alkynes with various metal catalysts.
ChemInform Abstract: Nickel‐Catalyzed α‐Glycosylation of C(1)‐Hydroxyl D‐myo‐Inositol: A Formal Synthesis of Mycothiol.
Authors: McConnell Matthew S. , Yu Fei , Nguyen Hien M. 
Published: August 2013

AbstractFormal synthesis of mycothiol is accomplished via Ni‐catalyzed α‐glycosylation of the C(1)‐hydroxyl group of myo‐inositol (II) with C(2)‐N‐substituted trifluoroacetimidate donors, such as (I).
ChemInform Abstract: Organocatalyzed Knoevenagel‐Addition — Simple Access to Carbon Chain‐Elongated Branched Carbohydrates.
Authors: Voigt Benjamin , Matviitsuk Anastassia , Mahrwald Rainer 
Published: August 2013

AbstractA chain‐elongation of terminal protected and unprotected carbohydrates via a Knoevenagel‐addition process of 3‐keto‐esters is presented.
ChemInform Abstract: A Short and Elegant Synthesis of (.+‐.)‐Streptopyrrolidine.
Authors: Shaameri Zurina , Ali Sharifah Hidayah Sharif , Mohamat Mohd Fazli , Yamin Bohari M. , Hamzah Ahmad Sazali 
Published: August 2013

AbstractA short synthesis of the natural (4R,5R)‐streptopyrrolidine (I) and its unnatural (4S,5S) enantiomer is described.
Bimetallic Iridium–Carbene Complexes with Mesoionic Triazolylidene Ligands for Water Oxidation Catalysis
Authors: Petronilho Ana , Woods James A. , Bernhard Stefan , Albrecht Martin 
Published: August 2013

AbstractTwo new diiridium–triazolylidene complexes were prepared as bimetallic analogues of established mononuclear water oxidation catalysts. Both complexes are efficient catalyst precursors in the presence of cerium ammonium nitrate (CAN) as sacrificial oxidant. Up to 20000:1 ratios of CAN/complex, the turnover limitation is the availability of CAN and not the catalyst stability. The water oxidation activity of the bimetallic complexes is not better than the monometallic species at 0.6 mM catalyst concentration. Under dilute conditions (0.03 mM), the bimetallic complexes double their activity, whereas the monometallic complexes show an opposite trend and display markedly reduced rates, thereby suggesting a benefit of the close proximity of two metal centers in this low concentration regime. The high dependence of catalyst activity on reaction conditions indicates that caution is required when catalysts are compared by their turnover frequencies only.
Zero‐forcing multi‐way relaying with sum rate maximisation
Authors: Wang Fanggang , Yuan Xiaojun 
Published: August 2013

AbstractWe investigate a wireless multi‐way relaying framework, in which a multi‐antenna relay carries outprecode‐and‐forward, that is, the relay collects and precodes the noisy signals from the users and then forwards the precoded signals to the desired users. We focus on the zero‐forcing (ZF) approach in which each user receives its signal of interest from one other user without suffering from the interference from the remaining users. We derive an optimal form of the ZF precoder that is generic for pairwise/non‐pairwise multi‐way relaying with/without network coding. Simulation results indicate that the proposed ZF relaying scheme with network coding considerably outperforms existing schemes. Copyright © 2013 John Wiley & Sons, Ltd.
Synthesis and Characterization of a New Fluorine‐Containing Polybenzimidazole (PBI) for Proton‐Conducting Membranes in Fuel Cells
Authors: Li X. , Qian G. , Chen X. , Benicewicz B. C. 
Published: August 2013

AbstractA new type of fluorine‐containing polybenzimidazole, namely poly(2,2′‐(2,2′‐bis(trifluoromethyl)‐4,4′‐biphenylene)‐5,5′‐bibenzimidazole) (BTBP‐PBI), was developed as a candidate for proton‐conducting membranes in fuel cells. Polymerization conditions were experimentally investigated to achieve high molecular weight polymers with an inherent viscosity (IV) up to 1.60 dl g–1. The introduction of the highly twisted 2,2′‐disubstituted biphenyl moiety into the polymer backbone suppressed the polymer chain packing efficiency and improved polymer solubility in certain polar organic solvents. The polymer also exhibited excellent thermal and oxidative stability. Phosphoric acid (PA)‐doped BTBP‐PBI membranes were prepared by the conventional acid imbibing procedure and their corresponding properties such as mechanical properties and proton conductivity were carefully studied. The maximum membrane proton conductivity was approximately 0.02 S cm–1 at 180 °C with a PA doping level of 7.08 PA/RU. The fuel cell performance of BTBP‐PBI membranes was also evaluated in membrane electrode assemblies (MEA) in single cells at elevated temperatures. The testing results showed reliable performance at 180 °C and confirmed the material as a candidate for high‐temperature polymer electrolyte membrane fuel cell (PEMFC) applications.
A validated multi‐scale model of a SOFC stack at elevated pressure
Authors: Henke M. , Willich C. , Westner C. , Leucht F. , Kallo J. , Bessler W. G. , Friedrich K. A. 
Published: August 2013

AbstractThis paper presents a multi‐scale model of a solid oxide fuel cell (SOFC) stack consisting of five anode‐supported cells. A two‐dimensional isothermal elementary kinetic model is used to calculate the performance of single cells. Several of these models are thermally coupled to form the stack model. Simulations can be carried out at steady‐state as well as dynamic operation. The model is validated over a wide range of operating conditions including variation of temperature, gas composition (both on anode and cathode side), and pressure. Validation is carried out using polarization curves and impedance spectra. The model is then used to explain the pressure‐induced performance increase measured at constant fuel utilization of 40%. Results show that activation and concentration overpotentials are reduced with increasing pressure.
Clinical outcomes among patients with head and neck cancer treated by intensity‐modulated radiotherapy with and without adaptive replanning
Authors: Chen Allen M. , Daly Megan E. , Cui Jing , Mathai Mathew , Benedict Stanley , Purdy James A. 
Published: August 2013

AbstractBackgroundThe purpose of this study was to determine the effect of adaptive replanning on clinical outcome among patients treated by intensity‐modulated radiotherapy (IMRT) for head and neck cancer.MethodsThree hundred seventeen patients underwent IMRT with daily image‐guidance for newly diagnosed squamous cell carcinoma of the head and neck to a median dose of 66 Gy (range, 60–74 Gy). Of these 317 patients, 51 (16%) underwent adaptive radiotherapy with modification of the original IMRT midway during treatment.ResultsThe 2‐year local‐regional control was 88% for patients treated with adaptive replanning compared with 79% for patients treated without (p = .01). The median time to local‐regional recurrence for the 4 patients treated by adaptive radiotherapy was 7 months (range, 3–15 months) with all failures occurring within the high‐dose planning target volume (PTV).ConclusionAlthough the use of routine replanning is probably not necessary, our findings do suggest a significant benefit in appropriately selected patients. © 2014 Wiley Periodicals, Inc. Head Neck 36: 1541–1546, 2014
Hypothyroidism after 3‐dimensional conformal radiotherapy and intensity‐modulated radiotherapy for head and neck cancers: Prospective data from 2 randomized controlled trials
Authors: Murthy Vedang , Narang Kushal , Ghosh–Laskar Sarbani , Gupta Tejpal , Budrukkar Ashwini , Agrawal Jai Prakash 
Published: August 2013

AbstractBackgroundThe purpose of this study was to determine the incidence of hypothyroidism after chemoradiation in head and neck squamous cell cancer (HNSCC).MethodsOne hundred twenty‐two patients treated with 3‐dimensional conformal radiotherapy (3DCRT; 70 Gy/35#) or intensity‐modulated radiation therapy (IMRT; 66 Gy/30#) in 2 identical simultaneous randomized trials were studied. Thyroid function was assessed at baseline and every 3 to 6 monthly thereafter. Development of subclinical (thyroid‐stimulating hormone [TSH] >4.67 μIU/mL) or biochemical (T4 <4.5 μg/dL) hypothyroidism was noted. Multivariate analyses were done to determine the factors associated with hypothyroidism.ResultsAt a median of 41 months, 55.1% of the patients developed hypothyroidism (39.3% subclinical, 15.7% biochemical). The IMRT arm had higher subclinical hypothyroidism (51.1% vs 27.3%; p = .021) peaking around 1 year postradiotherapy in both arms. Younger age, hypopharynx/larynx primary, node positivity, higher dose/fraction (IMRT arm), and D100 were statistically significant factors for developing hypothyroidism.ConclusionPostradiotherapy hypothyroidism peaks at 1 year. Higher dose per fraction possibly led to greater incidence of hypothyroidism in the IMRT cohort. © 2014 Wiley Periodicals, Inc. Head Neck 36: 1573–1580, 2014
Material properties of aged human mitral valve leaflets
Authors: Pham Thuy , Sun Wei 
Published: August 2013

AbstractThis study aimed to characterize the mechanical properties of aged human anterior mitral leaflets (AML) and posterior mitral leaflets (PML). The AML and PML samples from explanted human hearts (n = 21, mean age of 82.62 ± 8.77‐years‐old) were subjected to planar biaxial mechanical tests. The material stiffness, extensibility, and degree of anisotropy of the leaflet samples were quantified. The microstructure of the samples was assessed through histology. Both the AML and PML samples exhibited a nonlinear and anisotropic behavior with the circumferential direction being stiffer than the radial direction. The AML samples were significantly stiffer than the PML samples in both directions, suggesting that they should be modeled with separate sets of material properties in computational studies. Histological analysis indicated the changes in the tissue elastic constituents, including the fragmented and disorganized elastin network, the presence of fibrosis and proteoglycan/glycosaminoglycan infiltration and calcification, suggesting possible valvular degenerative characteristics in the aged human leaflet samples. Overall, stiffness increased and areal strain decreased with calcification severity. In addition, leaflet tissues from hypertensive individuals also exhibited a higher stiffness and low areal strain than normotensive individuals. There are significant differences in the mechanical properties of the two human mitral valve leaflets from this advanced age group. The morphologic changes in the tissue composition and structure also infer the structural and functional difference between aged human valves and those of animals. © 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 102A: 2692–2703, 2014.
Validation of a population of patient‐specific adult acquired flatfoot deformity models
Authors: Spratley E. Meade , Matheis Erika A. , Hayes Curtis W. , Adelaar Robert S. , Wayne Jennifer S. 
Published: August 2013

ABSTRACTAdult acquired flatfoot deformity (AAFD) is a degenerative disease resulting in malalignment of the mid‐ and hindfoot secondary to posterior tibial tendon dysfunction and increasing implication of ligament pathologies. Despite the complex 3D nature of AAFD, 2D radiographs are still employed to diagnose and stage the disease. Computer modeling techniques allow for accurate 3D recreations of musculoskeletal systems for the investigation of biomechanical factors contributing to disease. Following Institutional Review Board approval, the lower limbs of six diagnosed AAFD sufferers were imaged with MRI, photographs, and X‐ray. Next, a radiologist graded the MRI attenuation of eight soft‐tissues implicated in AAFD. Six patient‐specific rigid‐body models were then created and loaded according to patient weight, graded soft‐tissues, and extrinsic muscles. Model function was validated using clinically relevant kinematic measures in three planes. Agreement varied depending on the measure, with average absolute deviations of <7° for angles and <4 mm for distances. Additionally, the clinically favored AP talonavicular coverage angle, ML talo‐1st metatarsal angle, and ML 1st cuneiform height showed strong correlations of R2 = 0.63, 0.75, and 0.85, respectively. Thus, computer modeling offers a promising methodology for the non‐invasive investigation of in vivo kinematic behavior in pathologic feet and, once validated, may further be used to investigate biomechanical parameters that are difficult to measure clinically. © 2013 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 31:1861–1868, 2013
Short‐term effects of application of different rates of inorganic P and residue P on soil P pools and wheat growth
Authors: Alamgir Md , Marschner Petra 
Published: August 2013

AbstractPhosphorus (P) can be added to soil as inorganic P or crop‐residue P, but little is known about how these two forms of P addition affect soil P pools and how their effect changes with the rate of P addition. A glasshouse experiment was conducted to assess the effect of inorganic P and P added as residues at different rates on (1) soil P pools at two time points: immediately after amendment and 42 d later, and (2) growth and P uptake by wheat at flowering (day 42). Three types of legume residues (faba bean young shoot, chickpea mature shoots with pods, and white lupin mature shoots without pods) were added to a loamy‐sand soil at a rate of 5 or 15 g residue kg–1. Inorganic P was added at four different rates (3, 10, 30, and 100 mg P kg–1) to give P‐addition rates corresponding to the total P added with the different residues at the two residue rates. Soil P pool concentrations (microbial P, resin‐P, NaHCO3‐P, NaOH‐P, HCl‐P, and residual P) and wheat growth and P uptake (shoot and root) were measured after 6 weeks. Compared to inorganic P addition, P added with residues led to a 10%–80% greater increase in shoot biomass at the two highest P‐addition rates. Wheat P uptake was positively correlated with resin‐P and microbial‐P concentrations in residue‐P‐amended soil, but with resin‐P and NaOH‐Piconcentrations in soil amended with inorganic P. The concentration of HCl‐P decreased by up to 30% from day 0 to day 42 in the residue treatments and that of residual P decreased by about 20% in all treatments during this period suggesting that these nonlabile P pools are quite dynamic and could serve as P source for plants.
Determinants of health‐promoting lifestyle behaviors among arab immigrants from the region of the levant
Authors: Aqtash Salah , Van Servellen Gwen 
Published: August 2013

AbstractArab immigrants in the United States are at risk for heart disease, stroke, and diabetes. We explored health‐promoting lifestyle behaviors among Arab immigrants to the United States from the Middle Eastern region of the Levant. In 218 male and female Arab adults surveyed with the revised Health‐Promoting Lifestyle Profile (HPLP‐II), the mean for the HPLP‐II was 2.73 (range 1–4), with spiritual growth and interpersonal relations the most frequently reported practices and physical activity the least frequently practiced dimension of health‐promoting behaviors. Multiple linear regression analysis highlighted four determinants of health‐promoting lifestyle behaviors: health insurance, acculturation, self‐efficacy, and social support. Health promotion programs serving Arab immigrants should take these determinants into consideration. © 2013 Wiley Periodicals, Inc. Res Nurs Health 36: 466–477, 2013.
Drug–drug interactions in a cohort of hospitalized elderly patients
Authors: Pasina Luca , Djade Codjo D. , Nobili Alessandro , Tettamanti Mauro , Franchi Carlotta , Salerno Francesco , Corrao Salvatore , Marengoni Alessandra , Iorio Alfonso , Marcucci Maura , Mannucci PierMannuccio 
Published: August 2013

ABSTRACTPurposeThe aim of this study is to assess the prevalence of patients exposed to potentially severe drug–drug interactions (DDIs) at hospital admission and discharge and the related risk of in‐hospital mortality and adverse clinical events, readmission, and all‐cause mortality at 3 months.MethodsThis cross‐sectional, prospective study was held in 70 Italian internal medicine and geriatric wards. Potentially severe DDIs at hospital admission and discharge; risk of in‐hospital mortality and of adverse clinical events, readmission, and all‐cause mortality at 3‐month follow‐up.ResultsAmong 2712 patients aged 65 years or older recruited at hospital admission, 1642 (60.5%) were exposed to at least one potential DDI and 512 (18.9%) to at least one potentially severe DDI. Among 2314 patients discharged, 1598 (69.1%) were exposed to at least one potential DDI and 1561 (24.2%) to at least one potentially severe DDI. Multivariate analysis found a significant association with an increased risk of mortality at 3 months in patients exposed to at least two potentially severe DDIs (Odds ratio 2.62; 95% confidence interval, 1.00–6.68; p = 0.05). Adverse clinical events were potentially related to severe DDIs in two patients who died in the hospital, in five readmitted, and one who died at 3 months after discharge.ConclusionsHospitalization was associated with an increase in potentially severe DDIs. A significant association was found for mortality at 3 months after discharge in patients with at least two potentially severe DDIs. Careful monitoring for potentially severe DDIs, especially those created at discharge or recently generated, is important to minimize the risk of harm. Copyright © 2013 John Wiley & Sons, Ltd.
A PSO‐based maximum power point tracking for photovoltaic systems under environmental and partially shaded conditions
Authors: Sarvi Mohammad , Ahmadi Saeedeh , Abdi Shirzad 
Published: August 2013

AbstractTo increase the efficiency of photovoltaic (PV) systems, maximum power point (MPP) tracking of the solar arrays is needed. Solar arrays output power depends on the solar irradiance and temperature. Also the mismatch phenomenon caused by partial shade will affect the output power of solar systems and lead to the incorrect operation of conventional MPP tracker. Under partially shaded conditions, the solar array power–current characteristic has multiple maximum. This paper presents a maximum power point tracking (MPPT) with particle swarm optimization method for PV systems under partially shaded condition. The performance of the proposed method is compared with perturb and observe (P&O), improved P&O, voltage‐based maximum power point tracking and current‐based maximum power point tracking algorithms, especially, under partially shaded condition. Simulation results confirm that proposed MPPT algorithm with high accuracy can track the peak power point under different insolation, temperature and partially shaded conditions, and it has the best performance in comparison with four mentioned MPPT algorithms. Also under rapidly changing atmospheric conditions, the P&O algorithm is diverged. Copyright © 2013 John Wiley & Sons, Ltd.