bluuebunny/crossref_metadata_2025_split huggingface dataset:
Enhanced Aerobic Epoxidation of Styrene with Copper(II), Cobalt(II), Iron(III), or Oxovanadium(IV) Salen Complexes Immobilized onto Carbon‐Coated Fe3O4 Nanoparticles Hybridized with Graphene Sheets
Authors: Li Zhifang , Wu Shujie , Zheng Dafang , Ding Hong , Wang Xiufang , Yang Xiaoyuan , Huo Qisheng , Guan Jingqi , Kan Qiubin 
Published: March 2014

AbstractCore–shell structural magnetic nanocatalysts, involving carbon‐coated magnetic Fe3O4 nanoparticles supported on graphene oxide sheets (mildly reduced graphene oxide (MRGO)/Fe3O4@C) and carbonaceous coatings on magnetic Fe3O4 nanoparticles (Fe3O4@C), for immobilizing metal (CuII, CoII, FeIII or VOIV)–salen complexes were prepared by a facile, green, and efficient chemical approach and first applied in the aerobic epoxidation of styrene with air as the oxidizing agent. The prepared catalysts were characterized by different techniques, such as XRD, TEM, FTIR spectroscopy, inductively coupled plasma atomic emission spectroscopy, TEM, thermogravimetric analysis, Raman spectroscopy, and X‐ray photoelectron spectroscopy. The magnetic nanocatalysts MRGO/Fe3O4@C–salen–M (M=Cu, Co, Fe, or V) exhibited higher catalytic reactivity than that of the corresponding Fe3O4@C–salen–M (M=Cu, Co, Fe, or V) species possibly owing to site isolation, good dispersion of magnetic Fe3O4 nanoparticles, and an efficiently synergistic effect between the metal complexes and the supports. Furthermore, MRGO/Fe3O4@C–salen–Co exhibited up to 92.3 % conversion of styrene and 59.2 % selectivity to the styrene oxide upon using air as the oxidizing agent and showed good recoverability with negligible loss in activity and selectivity within successive runs owing to superparamagnetism. Most importantly, these materials can be easily recovered by simple magnetic separation.
Easily Regenerable Solid Adsorbents Based on Polyamines for Carbon Dioxide Capture from the Air
Authors: Goeppert Alain , Zhang Hang , Czaun Miklos , May Robert B. , Prakash G. K. Surya , Olah George A. , Narayanan S. R. 
Published: March 2014

AbstractAdsorbents prepared easily by impregnation of fumed silica with polyethylenimine (PEI) are promising candidates for the capture of CO2 directly from the air. These inexpensive adsorbents have high CO2 adsorption capacity at ambient temperature and can be regenerated in repeated cycles under mild conditions. Despite the very low CO2 concentration, they are able to scrub efficiently all CO2 out of the air in the initial hours of the experiments. The influence of parameters such as PEI loading, adsorption and desorption temperature, particle size, and PEI molecular weight on the adsorption behavior were investigated. The mild regeneration temperatures required could allow the use of waste heat available in many industrial processes as well as solar heat. CO2 adsorption from the air has a number of applications. Removal of CO2 from a closed environment, such as a submarine or space vehicles, is essential for life support. The supply of CO2‐free air is also critical for alkaline fuel cells and batteries. Direct air capture of CO2 could also help mitigate the rising concerns about atmospheric CO2 concentration and associated climatic changes, while, at the same time, provide the first step for an anthropogenic carbon cycle.
Controlling the Size and Composition of Nanosized Pt–Ni Octahedra to Optimize Their Catalytic Activities toward the Oxygen Reduction Reaction
Authors: Choi Sang‐Il , Xie Shuifen , Shao Minhua , Lu Ning , Guerrero Sandra , Odell Jonathan H. , Park Jinho , Wang Jinguo , Kim Moon J. , Xia Younan 
Published: March 2014

AbstractElectrocatalysts based on Pt–Ni alloys have received considerable interest in recent years owing to their remarkable activities toward the oxygen reduction reaction (ORR). Here, we report the synthesis of nanosized Pt–Ni octahedra with a range of controlled sizes and compositions in an effort to optimize their ORR activities. If we employed benzyl ether as a solvent for the synthesis, we could readily control the edge lengths of the Pt–Ni octahedra in the range of 6–12 nm and keep the Pt/Ni atomic ratio at around 2.4 by varying the amount of oleylamine added into the reaction system. If we adjusted the amount of Ni precursor, the atomic ratio of Pt to Ni in the Pt–Ni octahedra could be controlled in the range of 1.4–3.7 and their edge lengths were kept at 9 nm. For the catalysts with a Pt/Ni atomic ratio around 2.4, their specific ORR activities (per unit surface area) increased monotonically as the edge length increased from 6 to 12 nm. However, the mass activities (per unit mass of Pt) of these Pt–Ni octahedra showed a maximum value at an edge length of 9 nm. The specific and mass activities for the Pt–Ni octahedra with an edge length of 9 nm but different compositions both showed peak values at a Pt/Ni atomic ratio of 2.4.
Metabolic, hormonal characteristics and genetic variants of TCF7L2 associated with development of gestational diabetes mellitus in Mexican women
Authors: Reyes‐López Ruth , Pérez‐Luque Elva , Malacara Juan Manuel 
Published: March 2014

AbstractBackgroundVariation in TCF7L2 gene is associated with type 2 diabetes and with gestational diabetes mellitus in several populations, but there are no data in Mexican women with gestational diabetes mellitus. In this study, we examined metabolic and hormonal measurements as well as TCF7L2 genetic variants.MethodsWe selected 108 pregnant women with normal glucose tolerance and 90 with gestational diabetes mellitus according to 2010 American Diabetes Association criteria matched for gestational week. We collected data on blood pressure, body mass index (BMI) and concentrations of blood glucose, HbA1c, lipids profile, insulin and glucagon‐like peptide‐1 (GLP‐1). The genotyping of rs7903146 and rs12255372 polymorphisms were made with polymerase chain reaction–restriction fragment length polymorphism.ResultsActual and pre‐gestational BMI, fasting glucose and HbA1c were higher (p < 0.001), and high‐density lipoprotein cholesterol was lower (p < 0.02) in gestational diabetes mellitus women than euglycemic women. No significant differences were found for lipids, insulin and homeostasis model assessment—insulin resistance. Gestational diabetes mellitus women had high GLP‐1 levels (32 vs 24, p < 0.004) and decreased β‐cell function (266 vs 438, p < 0.001). The frequency of rs12255372 risk allele in gestational diabetes women was significantly higher than that in euglycemic women (χ2 = 8.96; p < 0.003) and confers a risk for gestational diabetes mellitus (OR = 9.1, 95% CI 2.8–29, p < 0.0002; and OR = 4.3, 95% CI 1.6–11.4, p < 0.003 based on dominant and co‐dominant model, respectively). The generalized linear model showed that low beta function, high pre‐gestational BMI and rs12255372 risk allele are independently associated with gestational diabetes.ConclusionsThe elevated GLP‐1 levels in gestational diabetes women suggested some abnormality in insulin secretion. The low β‐cell function, high pre‐gestational BMI and rs12255372 risk allele are risk factors independently associated with the development of gestational diabetes. Copyright © 2014 John Wiley & Sons, Ltd.
A novel potential therapy for vascular diseases: blood‐derived stem/progenitor cells specifically activated by dendritic cells
Authors: Porat Yael , Assa‐Kunik Efrat , Belkin Michael , Krakovsky Michael , Lamensdorf Itschak , Duvdevani Revital , Sivak Galit , Niven Mark J. , Bulvik Shlomo 
Published: March 2014

AbstractBackgroundVascular diseases are a major cause of morbidity and mortality, particularly in diabetic patients. Stem/progenitor cell treatments with bone marrow‐derived cells show safety and promising outcomes, albeit not without some preprocedural adverse events related to cell collection and mobilization. We describe a novel technology for generating a therapeutic population (BGC101) of enriched endothelial progenitor cells (EPCs) from non‐mobilized blood, using dendritic cells to specifically direct stem/progenitor cell activity in vitro.Methods and resultsSelected immature plasmacytoid and myeloid dendritic cells from 24 healthy and two diabetic donors were activated with anti‐inflammatory and pro‐angiogenic molecules to induce specific activation signals. Co‐culturing of activated dendritic cells with stem/progenitor cells for 12–66 h generated 83.7 ± 7.4 × 106 BGC101 cells with 97% viability from 250 mL of blood. BGC101, comprising 52.4 ± 2.5% EPCs (expressing Ulex‐lectin, AcLDL uptake, Tie2, vascular endothelial growth factor receptor 1 and 2, and CD31), 16.1 ± 1.9% stem/progenitor cells (expressing CD34 and CD184) and residual B and T helper cells, demonstrated angiogenic and stemness potential and secretion of interleukin‐8, interleukin‐10, vascular endothelial growth factor and osteopontin. When administered to immunodeficient mice with limb ischemia (n = 40), BGC101 yielded a high safety profile and significantly increased blood perfusion, capillary density and leg function after 21 days. Cell tracking and biodistribution showed that engraftment was restricted to the ischemic leg.ConclusionsThese observations provide preliminary evidence that alternatively activated dendritic cells can promote the generation of EPC‐enriched stem/progenitor cells within a 1‐day culture. The resulting product BGC101 has the potential for treatment of various vascular conditions such as coronary heart disease, stroke and peripheral ischemia. Copyright © 2014 John Wiley & Sons, Ltd.
Bismuth Film Electrodes for Adsorptive Stripping Voltammetric Determination of Sunset Yellow FCF in Soft Drinks
Authors: Królicka Agnieszka , Bobrowski Andrzej , Zarębski Jerzy , Tesarowicz Iwona 
Published: March 2014

AbstractThe bismuth film electrode was used to record well‐developed voltammograms of azo food coloring Sunset Yellow FCF (SY). The employed Bi(III)/HClO4 plating solutions produced very adhesive and mechanically stable films that were applied in both stationary and flow conditions. The influence of the dimensions of the glassy carbon support, plating solution concentration and potential was discussed. The sensitivity of SWV was sufficient to obtain a linear calibration curve for low concentration levels of SY (below 0.1 mg/L; LOD=1 µg/L, linear range 4.4–87 µg/L). The measurements in a flow system were considered as a tool for the determination of relatively high concentrations (>1 mg/L; LOD=300 µg/L, linear range 300–8800 µg/L) of SY.
Solid Contact Nitrate Ion‐Selective Electrode Based on Ionic Liquid with Stable and Reproducible Potential
Authors: Wardak Cecylia 
Published: March 2014

AbstractA simple, fast and cheap method of preparation of solid contact nitrate ion‐selective electrode is proposed. The electrode membrane phase consist of only three components: PVC, plasticizer and ionic liquid (IL).The ionic liquid trihexyltetradecylphosphonium chloride is used in triple function as ionophore, as lipophilic ionic component in order to reduce membrane resistance, and as transducer media in order to stabilize the potential of internal Ag/AgCl electrode. The electrical properties of the membrane were studied by electrochemical impedance spectroscopy and the influence of the interfacial water film was evaluated by potentiometric water layer test.
Synthesis of Ultrathin GeO2–Reduced Graphene Oxide (RGO) Sheets for a High‐Capacity Lithium‐Ion Battery Anode
Authors: Ma De‐Long , Yuan Shuang , Huang Xiao‐Lei , Cao Zhan‐Yi 
Published: March 2014

AbstractGeO2 is a promising high‐performance anode material for Li‐ion batteries (LIBs) because of its high theoretical reversible capacity, low operation voltage, and high thermal stability. Herein, a simple, cheap, and easily scaled‐up synthetic procedure for preparing ultrathin GeO2–reduced graphene oxide (RGO) sheets is proposed and realized through a freeze‐drying method. The as‐prepared GeO2–RGO show non‐aggregated graphene sheets and homogeneously dispersed GeO2 nanoparticles. As a high‐performance anode material for LIBs, the composite shows a high specific capacity (1200 mAh g−1 at current density of 100 mA g−1), good cycling performance, and rate capability.
The relationships between stressful life events during childhood and differentiation of self and intergenerational triangulation in adulthood
Authors: Peleg Ora 
Published: March 2014

This study examined the relationships between stressful life events in childhood and differentiation of self and intergenerational triangulation in adulthood. The sample included 217 students (173 females and 44 males) from a college in northern Israel. Participants completed the Hebrew versions of Life Events Checklist (LEC), Differentiation of Self Inventory‐Revised (DSI‐R) and intergenerational triangulation (INTRI). The main findings were that levels of stressful life events during childhood and adolescence among both genders were positively correlated with the levels of fusion with others and intergenerational triangulation. The levels of positive life events were negatively related to levels of emotional reactivity, emotional cut‐off and intergenerational triangulation. Levels of stressful life events in females were positively correlated with emotional reactivity. Intergenerational triangulation was correlated with emotional reactivity, emotional cut‐off, fusion with others and I‐position. Findings suggest that families that experience higher levels of stressful life events may be at risk for higher levels of intergenerational triangulation and lower levels of differentiation of self.
LESSONS FROM THE PROGRESS OF KOREA'S ENVIRONMENTAL IMPACT ASSESSMENT SYSTEM IN THE AGRICULTURAL SECTOR
Authors: Heo Namjoo 
Published: March 2014

ABSTRACTKorea's massive agricultural projects have frequently exceeded the ecosystem's resilience, resulting in many environmental problems. Korea sought to remedy this situation via policy and adopted an environmental impact assessment (EIA) system. However, the EIA system needed to be modified for the agricultural sector. This is because agricultural development plans are somewhat different from urban or industrial development plans in terms of impact intensity and their multifunctional traits. Since adopting the system in 1977, Korea has gradually improved its EIA system in favour of wise use and strong implementation in the agricultural sector. Even though there is much that can still be improved upon in terms of compromise by stakeholders (including farmers), Korea has recently achieved some success by providing a unified channel for EIA work, an interactive platform for stakeholders, a specific EIA guideline suitable for the agricultural sector, and strong enforcement of EIA implementation. Korea's EIA development with respect to the agricultural sector can be a useful reference for all developing countries that are eager to realize systematic sustainable agricultural development. Copyright © 2014 John Wiley & Sons, Ltd.
Early Changes in Bone Density, Microarchitecture, Bone Resorption, and Inflammation Predict the Clinical Outcome 12 Weeks After Conservatively Treated Distal Radius Fractures: An Exploratory Study
Authors: Meyer Ursina , de Jong Joost J , Bours Sandrine GP , Keszei András P , Arts Jacobus J , Brink Peter RG , Menheere Paul , van Geel Tineke ACM , van Rietbergen Bert , van den Bergh Joop PW , Geusens Piet P , Willems Paul C 
Published: March 2014

ABSTRACT

Fracture healing is an active process with early changes in bone and inflammation. We performed an exploratory study evaluating the association between early changes in densitometric, structural, biomechanical, and biochemical bone parameters during the first weeks of fracture healing and wrist-specific pain and disability at 12 weeks in postmenopausal women with a conservatively treated distal radius fracture. Eighteen patients (aged 64 ± 8 years) were evaluated at 1 to 2 and 3 to 4 weeks postfracture, using high-resolution peripheral quantitative computed tomography (HR-pQCT), micro-finite element analysis, serum procollagen type-I N-terminal propeptide (P1NP), carboxy-terminal telopeptide of type I collagen (ICTP), and high-sensitive C-reactive protein (hsCRP). After 12 weeks, patients rated their pain and disability using Patient Rated Wrist Evaluation (PRWE) questionnaire. Additionally, Quick Disability of the Arm Shoulder and Hand (QuickDASH) questionnaire and active wrist range of motion was evaluated. Linear regression models were used to study the relationship between changes in bone parameters and in hsCRP from visit 1 to 2 and PRWE score after 12 weeks. A lower PRWE outcome, indicating better outcome, was significantly related to an early increase in trabecular bone mineral density (BMD) (β −0.96 [95% CI −1.75 to −0.16], R2 = 0.37), in torsional stiffness (−0.14 [−0.28 to −0.004], R2 = 0.31), and to an early decrease in trabecular separation (209 [15 to 402], R2 = 0.33) and in ICTP (12.1 [0.0 to 24.1], R2 = 0.34). Similar results were found for QuickDASH. Higher total dorsal and palmar flexion range of motion was significantly related to early increase in hsCRP (9.62 [3.90 to 15.34], R2 = 0.52). This exploratory study indicates that the assessment of early changes in trabecular BMD, trabecular separation, calculated torsional stiffness, bone resorption marker ICTP, and hsCRP after a distal radius fracture provides valuable information regarding the 12-week clinical outcome in terms of pain, disability, and range of motion and validates its use in studies on the process of early fracture healing. © 2014 American Society for Bone and Mineral Research.
Do antioxidants inhibit oxidative‐stress‐induced autophagy of tenofibroblasts?
Authors: Kim Ra‐Jeong , Hah Young‐Sool , Sung Chang‐Meen , Kang Jae‐Ran , Park Hyung Bin 
Published: March 2014

ABSTRACTRecent research on tendinopathy has focused on its relationship to programmed cell death. Increased autophagy has been observed in ruptured rotator cuff tendon tissues, suggesting a causal relationship. We investigated whether autophagy occurs in human rotator cuff tenofibroblast death induced by oxidative stress and whether antioxidants protect against autophagic cell death. We used H2O2 (0.75 mM) as oxidative stressor, cyanidin (100 µg/ml) as antioxidant, zVAD (20 µM) as apoptosis inhibitor, and 3‐MA (10 mM) as autophagy inhibitor. We evaluated cell viability and known autophagic markers: LC3‐II expression, GFP‐LC3 puncta formation, autolysosomes, and Atg5‐12 and Beclin 1 expression. H2O2 exposure increased the rates of cell death, LC3‐II expression, GFP‐LC3 puncta formation, and autolysosomes. After we induced apoptosis arrest using zVAD, H2O2 exposure still induced cell death, LC3‐II expression, and GFP‐LC3 puncta formation. H2O2 exposure also increased Atg5‐12 and Beclin 1 expressions, indicating autophagic cell death. However, cyanidin treatment reduced H2O2‐induced cell death, LC3‐II expression, GFP‐LC3 puncta formation, and autolysosomes. Cyanidin and 3‐MA similarly reduced the cell‐death rate, and Atg5‐12 and Beclin 1 expression. This study demonstrated that H2O2, an oxidative stressor, induces autophagic cell death in rotator cuff tenofibroblasts, and that cyanidin, a natural antioxidant, inhibits autophagic cell death. © 2014 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 32:937–943, 2014.
Meniscus regeneration by syngeneic, minor mismatched, and major mismatched transplantation of synovial mesenchymal stem cells in a rat model
Authors: Okuno Makiko , Muneta Takeshi , Koga Hideyuki , Ozeki Nobutake , Nakagawa Yusuke , Tsuji Kunikazu , Yoshiya Shinichi , Sekiya Ichiro 
Published: March 2014

ABSTRACTWe compared the effect of syngeneic and allogeneic transplantation of synovial mesenchymal stem cells (MSCs) for meniscus regeneration in a rat model. Synovium was harvested from the knee joints of three strains of rats. The anterior half of the medial meniscus in both knees of F344 rats was removed and 5 million synovial MSCs derived from F344 (syngeneic transplantation), Lewis (minor mismatched transplantation), and ACI (major mismatched transplantation) were injected into the knee of the F344 rats. At 4 weeks, the area of the regenerated meniscus in the F344 group was significantly larger than that in the ACI group. Histological score was significantly better in the F344 and Lewis groups than in the ACI group at 8 weeks. DiI labeled cells could be observed in the knee joint in the F344 group, but were hardly detected in the ACI group at 1 week. The number of macrophages and CD8 T cells at synovium around the meniscus defect was significantly lower in the F344 group than in the ACI group at 1 week. Syngeneic and minor mismatched transplantation of synovial MSCs promoted meniscus regeneration better than major mismatched transplantation in a rat meniscectmized model. © 2014 The Authors. Journal of Orthopaedic Research Published by Wiley Periodicals, Inc. J Orthop Res 32:928–936, 2014.
Determining breast cancer axillary surgery within the surveillance epidemiology and end results‐Medicare database
Authors: Schmocker Ryan K. , Caretta‐Weyer Holly , Weiss Jennifer M. , Ronk Katie , Havlena Jeffrey , LoConte Noelle K. , Decker Marquita , Smith Maureen A. , Greenberg Caprice C. , Neuman Heather B. 
Published: March 2014

BackgroundUse of sentinel lymph node biopsy (SLNB) is under‐reported by cancer registries' “Scope of Regional Lymph Node Surgery” variable. In 2011, the Surveillance Epidemiology and End Results (SEER) Program recommended against its use to determine extent of axillary surgery, leaving a gap in the utilization of claims data for breast cancer research. The objective was to develop an algorithm using SEER registry and claims data to classify extent of axillary surgery for breast cancer.MethodsWe analyzed data for 24,534 breast cancer patients. CPT codes and number of examined lymph nodes classified the extent of axillary surgery. The final algorithm was validated by comparing the algorithm derived extent of axillary surgery to direct chart review for 100 breast cancer patients treated at our breast center.ResultsUsing the algorithm, 13% had no axillary surgery, 56% SLNB and 31% axillary lymph node dissection (ALND). SLNB was performed in 77% of node negative patients and ALND in 72% of node positive. In our validation study, concordance between algorithm and direct chart review was 97%.ConclusionsGiven recognized inaccuracies in cancer registries' “Scope of Regional Lymph Node Surgery” variable, these findings have high utility for health services researchers studying breast cancer treatment. J. Surg. Oncol. 2014 109:756–759. © 2014 Wiley Periodicals, Inc.
Passive pin reflection frequency selective surface for interference reduction in the built environment
Authors: Davenport Christopher J. , Rigelsford Jonathan M. 
Published: March 2014

ABSTRACTProposed is a passive periodic pin reflection frequency selective surface (PR‐FSS) suitable for installation in indoor environments to reduce interference caused by multiple cochannel wireless transmitters. The PR‐FSS is developed from a comb reflection FSS and provides comparable performance with the use of less material. © 2014 The Authors. Microwave and Optical Technology Letters Published by Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1424–1427, 2014
Compact wideband printed flower slot antenna
Authors: Tang Ming‐Chun , Ziolkowski Richard W. , Xiao Shaoqiu 
Published: March 2014

ABSTRACTThe design and testing of a compact flower slot antenna suitable for WLAN and WiMAX operations is reported in this article. The antenna consists of a flower shaped slot which is fed with a 50‐Ω microstrip line terminated with a circular patch stub. The measured results show that it offers a wide, 115.2% fractional bandwidth (from 2.11 to 7.84 GHz). Moreover, desirable radiation performance characteristics, including relatively stable and omnidirectional radiation patterns, are obtained over this range. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1465–1468, 2014