bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Influence of Alkali Metal Ions on the Stability and Reactivity of Chromium(III) Superoxide Moieties Spanned by Siloxide Ligands
Authors: Wind Marie‐Louise , Hoof Santina , Herwig Christian , Braun‐Cula Beatrice , Limberg Christian 
Published: February 2019

AbstractIn recent years, it has become clear that the presence of redox‐inactive Lewis acidic metal ions can decisively influence the reactivity of metal–dioxygen moieties that are formed in the course of O2 activation, in molecular complexes, and metalloenzymes. Superoxide species are often formed as the primary intermediates but they are mostly too unstable for a thorough investigation. We report here a series of chromium(III) superoxide complexes [L2Cr]M2O2(THF)y (L=−OSiPh2OSiPh2O−, M+=Li+, Na+, K+ and y=4, 5), which could be accessed, studied spectroscopically and partly crystallized at low temperatures. They only differ in the two incorporated Lewis acidic alkali metal counterions (M+) and it could thus be shown that the nature of M+ determines considerably its interaction with the superoxide ligand. This interaction, in turn, has a significant influence on the stability and reactivity of these complexes towards substrates with OH groups. Furthermore, we show that stability and reactivity are also highly solvent dependent (THF versus nitriles), as donor solvents coordinate to the alkali metal ions and thus also influence their interaction with the superoxide moiety. Altogether, these results provide a comprehensive and detailed picture concerning the correlation between spectroscopic properties, structure, and behavior of such superoxides, that may be exemplary for other systems.
Conformational Changes and Redox Properties of Bimetallic Single Helicates of Hexapyrrole‐α,ω‐dicarbaldehydes
Authors: Eerdun Chaolu , Nguyen Thi Hien Thuy , Okayama Takuya , Hisanaga Satoshi , Setsune Jun‐ichiro 
Published: February 2019

AbstractThe hexapyrrole‐α,ω‐dicarbaldehydes 1 a and 1 b were metallated with CuII, NiII, and PdII to give bimetallic complexes where a pair of 3 N+O four‐coordinate metal planes are helically distorted and the central 2,2′‐bipyrrole subunit adopts a cis or trans conformation. X‐ray crystallographic analysis of the bisCu complex revealed a closed form with a cis‐2,2′‐bipyrrole subunit and an open form with a trans‐2,2′‐bipyrrole subunit. The bisPd complexes took a closed form both in the solid state and in solution. They are regarded as single helicates of two turns and the energy barrier for the interchange between an M helix and a P helix was remarkably influenced by the bulky 3,3′‐substituent of the central 2,2′‐bipyrrole subunit. Although the bisNi complexes adopt a closed form in the solid state, they exist as a homohelical open C2‐symmetric form or a heterohelical open Ci‐symmetric form in solution. A theoretical study suggested that the closed form of 1 aPd was stabilized by the Pd–Pd interaction. Compound 1 aPd was reversibly oxidized by one electron at 0.14 V versus ferrocene/ferrocenium (Fc/Fc+) and this oxidized species showed Vis/NIR absorption bands at λ=767 and 1408 nm.
Impact of healthy lifestyles on cancer risk in the Chinese population
Authors: Wang Xinyan , Yang Xueli , Li Jianxin , Liu Fangchao , Chen Jichun , Liu Xiaoqing , Cao Jie , Shen Chong , Yu Ling , Lu Fanghong , Wu Xianping , Zhao Liancheng , Wu Xigui , Li Ying , Hu Dongsheng , Huang Jianfeng , Lu Xiangfeng , Gu Dongfeng 
Published: February 2019

BackgroundAlthough cancer has become one of the leading health burdens, to the authors’ knowledge, evidence regarding its relationship with a healthy lifestyle in the Chinese population remains limited.MethodsThe authors evaluated the association between clustering of healthy lifestyle factors and cancer risk using 3 prospective cohort studies with 101,208 Chinese adults from the general population. Hazard ratios (HRs) and corresponding 95% confidential intervals (95% CIs) related to healthy lifestyle factors were calculated using Cox proportional hazard models, and population‐attributable risk percentages were estimated further.ResultsThe results demonstrated that each additional healthy lifestyle factor was associated with a 6% (range, 3%‐9%) lower risk of overall cancer. Compared with having none to 3 healthy lifestyle factors, HRs related to adherence to all 6 healthy lifestyle factors were 0.78 (95% CI, 0.60‐1.02) and 0.82 (95% CI, 0.67‐1.00), respectively, for men and women. It was estimated that approximately 18.4% and 2.3%, respectively, of overall cancer cases for men and women were attributable to nonadherence to all 6 healthy lifestyle factors.ConclusionsThe results of the current study indicate that adherence to clustering of healthy lifestyle factors was associated with a reduced risk of cancer incidence among Chinese adults. Greater efforts urgently are needed to promote the adoption of multiple healthy lifestyle behaviors to reduce the increasing burden of cancer.
DaC‐Join: A join operator for improving database performance on modern hardware
Authors: Alencar Namom , Brayner Angelo , Monteiro José Maria , Filho José de Aguiar Moraes 
Published: February 2019

SummaryThe computer industry is moving toward the construction in large scale of chips with hundreds of cores to increase on‐chip parallelism. In parallel, computers with solid state memory, the so‐called solid state drive (SSD for short), providing petabytes of storage area, is emerging. Nonetheless, database systems (DBSs) were designed based upon two premises. The first is the usage of magnetic disks (HDDs). The second one is that distributed DBSs could scale beyond what a single‐node DBMS can support. However, the latter premise only holds for a small number of CPU cores per node and for a limited number of nodes. Thus, to fully exploit benefits of parallelism and high IOPS rates supported by many‐core machines with SSDs, database systems should be aware of upcoming CPU architecture and storage technology. In this paper, we present a new join algorithm, denoted DaC‐Join, whose key goal is to exploit on‐chip parallelism and high IOPS rates delivered by modern hardware. DaC‐Join is able to run on multiple cores in parallel, increasing this way intra‐operator parallelism. Furthermore, the proposed operator effectively decreases the activity of writing back join temporary results on SSDs, which minimizes the problem of write operation latency in SSDs. In order to validate the novel approach, simulations with a prototype have been conducted over TPC‐H benchmark database, scale factor 10. The achieved results evidence the suitability of DaC‐Join.
Synthesis of 2‐Amino‐4‐Fluoropyridine‐C‐Nucleoside Phosphoramidite for Incorporation into Oligonucleotides
Authors: Sato Kousuke , Matsuda Akira 
Published: February 2019

AbstractStraightforward and efficient methods for the synthesis of 2‐amino‐4‐fluoropyridine‐C‐nucleoside (dFP) and the solid‐phase synthesis of oligodeoxynucleotides containing dFP using a phosphoramidite are described. The synthesis of dFP is achieved by cross‐coupling between a nucleobase (2‐amino‐4‐fluoro‐3,5‐diiodopyridine) and sugar moieties. Its 3′‐O‐phosphoramidite is obtained by deiodination, 5′‐O‐protection, and 3′‐O‐phosphitilation in three steps. The phosphoramidite unit is compatible for the synthesis of oligonucleotides on solid‐phase according to conventional phosphoramidite chemistry. The 2‐amino‐4‐fluoropyridine‐C‐nucleoside moiety incorporated into the oligodeoxynucleotide reacts with a Cys residue in the catalytic site of DNA cytosine‐5‐methyltransferase (DNMT). It is apparent that 2‐amino‐4‐fluoropyridine‐C‐nucleoside would be utilized in DNA‐protein crosslink technology. This protocol describes the importance of solid‐phase synthesis to obtain novel pyridine‐C‐nucleoside analogues and its incorporation into oligodeoxynucleotides in a short period of time. © 2019 by John Wiley & Sons, Inc.
Sustainability and sustainable development strategies in the U.K. plastic electronics industry
Authors: Borland Helen , Bhatti Yohan , Lindgreen Adam 
Published: February 2019

AbstractThe growing plastic electronics industry constitutes an important arena for addressing sustainability challenges. This study integrates literature related to eco‐innovations and ecocentric business strategies to investigate its ability to adopt a sustainable development strategy on the basis of ecological sustainability. An exploratory qualitative study in the U.K. market reveals the need for both technological‐push and market‐pull factors to guide technological development. Awareness of sustainable development and the potential to support it are high, but actors in this sector do not prioritize these concerns. Efforts to increase commitment to sustainable development must address three distinctive groups: innovative developers, supplier/manufacturers, and industry facilitators. Articulating the importance of sustainable development might create incentives and generate market pull. The industry also has potential to support sustainable development, which then can support industry development. This article thus offers theoretical insights for ecocentric eco‐innovations, ecocentric business strategy, and ecocentric visionary leadership, along with managerial, industry, and policy implications.
The influence of financial performance on corporate social innovation
Authors: Alonso‐Martínez Daniel , González‐Álvarez Nuria , Nieto Mariano 
Published: February 2019

AbstractThe study draws from the literature on corporate social innovation (CSI) and financial performance and extends previous studies about this relationship. In addition, given the scant literature on corporate social innovation, the paper tries to generate a common framework for this topic. It proposes a definition and a measure of CSI. The measure aims to reflect the contribution that firms make to society in terms of innovation. The sample includes firm observations that cover 6‐year longitudinal panel data, including 1,122 firms in 29 countries. Our findings confirm that firms invest their financial resources (mainly firm performance) in CSI but, instead of investing immediately, take at least 1 year to do so. Stakeholder engagement, the relevance of sustainable innovation business models, and social and environmental policies contribute to integrating CSI. Our study contributes to filling the gap in the literature on CSI and provides several implications for NGOs, managers, and policymakers.
Product recall as a way of responsible management of a firm: The roles of corporate social responsibility and board members' sense of ownership
Authors: Oh Hannah , Bae John , Kim Sang‐Joon , Choi Ryan 
Published: February 2019

AbstractThis paper employs a new perspective for viewing product recall as a way to responsibly manage a firm with a record of corporate social responsibility (CSR) engagement. Firms known for their past CSR performance are assumed to be responsible in recalling defective products when a product‐harm crisis occurs. We examine whether the cumulated CSR efforts increase the likelihood of engaging in a voluntary product recall. To further reinforce the perspective, we examine whether the relationship still holds under performance pressure. In addition, this study examines the moderating effect of board characteristics that give a sense of ownership to board members (e.g., a family member of a founder, holding block shares, and voting power) in increasing socially responsible firms' engagement in the voluntary recall. The hypotheses were tested using a sample of 592 public firms in the United States from 2001 to 2014.
Hair cortisol in the perinatal period mediates associations between maternal adversity and disrupted maternal interaction in early infancy
Authors: Nyström‐Hansen Maja , Andersen Marianne S. , Khoury Jennifer E. , Davidsen Kirstine , Gumley Andrew , Lyons‐Ruth Karlen , MacBeth Angus , Harder Susanne 
Published: February 2019

AbstractExisting literature points to the possibility that cortisol could be one link between maternal adversity and poorer parenting quality, but most studies have examined salivary cortisol concentrations rather than hair cortisol concentrations. The current study examined hair cortisol concentration (HCC) during the third trimester of pregnancy as a mediator between maternal adversity indicators (childhood abuse, severe mental illness, symptomatic functioning) and maternal caregiving behavior at 4 months postpartum. Forty‐four women participated in the study: 30 with severe mental disorders, and 14 nonclinical controls. HCC was assessed during the third trimester of pregnancy (HCC‐P) and at 4 months postpartum (HCC‐4M). Sexual, physical, and emotional abuse were assessed by the Adverse Childhood Experiences Study Questionnaire. Maternal disrupted interaction was reliably coded from mother–infant video interactions during a Still‐Face Procedure. Mediation models indicated that maternal HCC‐P and HCC‐4M mediated associations between maternal psychopathology (severe mental illness, symptomatic functioning) and maternal disrupted interaction at 4 months. Maternal HCC at 4 months also mediated associations between experienced childhood abuse and overall disrupted interaction. Our findings indicate that HCC may be a potential early biomarker for future caregiving challenges among mothers with severe mental illness and histories of childhood abuse.
Rainfall partitioning varies across a forest age chronosequence in the southernAppalachianMountains
Authors: Brantley Steven T. , Miniat Chelcy F. , Bolstad Paul V. 
Published: February 2019

AbstractEvaporation of precipitation from plant surfaces, or interception, is a major component of the global water budget. Interception has been measured and/or modelled across a wide variety of forest types; however, most studies have focused on mature, second‐growth forests, and few studies have examined interception processes across forest age classes. We present data on two components of interception, total canopy interception (Ei) and litter interception—that is, Oi + Oehorizon layers—(Eff), across a forest age chronosequence, from 2 years since harvest to old growth. We used precipitation, throughfall, and stemflow collectors to measure total rainfall (P) and estimateEi; and collected litter biomass and modelled litter wetting and drying to estimate evaporative loss from litter. CanopyEi,Pminus throughfall, increased rapidly with forest age and then levelled off to a maximum of 21% ofPin an old‐growth site. Stemflow also varied across stands, with the highest stemflow (~8% ofP) observed in a 12‐year‐old stand with high stem density. ModelledEffwas 4–6% ofPand did not vary across sites. Total stand‐level interception losses (Ei + Eff) were best predicted by stand age (R2 = 0.77) rather than structural parameters such as basal area (R2 = 0.49) or leaf area (R2 < 0.01). Forest age appears to be an important driver of interception losses from forested mountain watersheds even when stand‐level structural variables are similar. These results will contribute to our understanding of water budgets across the broader matrix of forest ages that characterize the modern forest landscape.
A Molybdenum Carbide Nanotubes Modified Electrode as the Functionalized Sensing Platform for Electrochemical Detection of Dopamine
Authors: Li Ke , Han Yanchao , Li Jing , Xing Huanhuan , Chen Lei , Li Guang , Zhu Xiaoqing , Wang Erkang 
Published: February 2019

AbstractIn this work, molybdenum carbide (Mo2C) nanotubes were prepared via the self‐degradable template method and high‐temperature calcination, and then were successfully used to modify glassy carbon electrode (CGE) for the high‐sensitivity determination of dopamine (DA) without the inference of ascorbic acid(AA) and uric acid (UA). The surface morphology of Mo2C nanotubes has been investigated by scanning electron microscope (SEM) and transmission electron microscope (TEM). Owing to the enhanced electron transfer rate and high surface area of Mo2C, the modified electrode not only exhibits very excellent electrochemical performance for DA, but also has good analytical performance for DA in the mixture with AA and UA through differential pulse voltammetry (DPV), which can be applied for DA detection with wide linear range(0.005–50 μmol L−1) and low detection limit 0.001 μmol L−1. The modified electrode has been applied to detect DA in DA hydrochloride injection by using standard adding method with satisfactory results.
Electrochemical Biosensor for Sensitive Quantification of Glyphosate in Maize Kernels
Authors: Cahuantzi‐Muñoz Selene L. , González‐Fuentes Miguel A. , Ortiz‐Frade Luis A. , Torres Eduardo , Ţălu Ştefan , Trejo G. , Méndez‐Albores Alia 
Published: February 2019

AbstractA graphite‐epoxy electrode (GE) modified with multiwalled carbon nanotubes (MWCNTs) and horseradish peroxidase (GE/MWCNTs‐HRP) was used to build a glyphosate biosensor whose performance in aqueous solutions depends on the enzyme activity. For the biosensor preparation, MWCNTs were deposited onto the GE surface by electrophoresis using an oxidative treatment (H2SO4/HNO3) in presence of cetyl tributylammonium bromide (CTAB) as a cationic surfactant. The surfactant was further removed from the MWCNTs surface by dipping the electrode in an EtOH/HCl solution. The physical immobilization of HRP and therefore the glyphosate sensing capabilities was tested at pH 4 where the herbicide exhibits one only species. Circular dichroism studies suggested that the secondary structure of HRP changes as a result of its interaction with glyphosate and that this change is intensified by the combination of glyphosate and H2O2, which may explain the decrease of the enzyme catalytic activity with the increase of glyphosate concentration. The glyphosate quantification in doped‐maize kernels was highly reproducible and exhibits detection and quantification limits of 1.32 pM and 1.63 pM respectively. The biosensor is also characterized by a high recovery (100 %) and precision (coefficient of variation <1 %) and can be employed in presence of interfering substances such as chlorpyrifos (an organophosphate pesticide) and starch.
Development of bedforms due to waves blocked by a counter current
Authors: Chatterjee Debasmita , Ghosh Subir , Mazumder Bijoy S. , Sarkar Kaushik 
Published: February 2019

AbstractExperiments are conducted in a laboratory flume on the propagation of a surface wave against unidirectional flow with a sediment bed. This article presents the spatial variation of bedforms induced by the wave‐blocking phenomenon by a suitably tuned uniform fluid flow and a counter‐propagating wave. The occurrence of wave‐blocking is confirmed by finding a critical wave frequency in a particular flow discharge in which the waves are effectively blocked and is established using the linear dispersion relation. The purpose of this work is to identify wave‐blocking and its influence on the development of bedforms over the sediment bed. Interestingly bedform signatures are observed at a transition of bedforms in three zones, with asymmetric ripples having a steeper slope downstream face induced by the incoming current, followed by flat sand bars beneath the wave‐blocking zone and more symmetric ripples below the wave‐dominated region at the downstream. This phenomenon suggests that the sediment bed is segmented into three different regions of bed geometry along the flow. The deviations of mean flows, Reynolds stresses, turbulent kinetic energy, and power spectral density due to the wave‐blocking phenomenon are presented along the non‐uniform flow over sediment bed. The bottom shear stress, bed roughness and stochastic nature of the bedform features are also discussed. The results are of relevance to engineers and geoscientists concerned with contemporary process as well as those interested in the interpretation of palaeoenvironmental conditions from fossil bedforms. © 2019 John Wiley & Sons, Ltd.
Application of steam explosion in oil extraction of camellia seed (Camellia oleifera Abel.) and evaluation of its physicochemical properties, fatty acid, and antioxidant activities
Authors: Zhang Shanying , Pan Yong‐Gui , Zheng Lili , Yang Yang , Zheng Xiaoyan , Ai Binling , Xu Zhimin , Sheng Zhanwu 
Published: February 2019

AbstractThis study evaluated the physicochemical properties of oils extracted from steam‐exploded camellia seed (Camellia oleifera Abel.). Steam pressure, resident time, fatty acid composition, total phenolics, tocopherol, squalene, and sterol contents, and volatile compounds were determined. 1H NMR and FTIR spectra were performed for the structure of camellia seed oil. This study has found the highest yield of oil was 86.56% and was obtained when steam explosion pretreatment was at 1.6 MPa 30 s. Oil extracted by steam explosion pretreatment exhibited favorable physicochemical properties and stronger antioxidant activities compared to untreated oil. The compositions of fatty acid were similar between treated and untreated camellia seed oil. According to the 1H NMR and FTIR analyses, the functional groups of the oils were not significantly affected by the steam explosion pretreatment. Furans such as 2‐pentyl‐furan, 2‐furanmethanol, and 3‐methyl‐furan were produced from stream‐exploded camellia seed. Scanning electron microscopy revealed that steam explosion pretreatment efficiently promoted the release of oil by destroying the cell structure of camellia seed. Therefore, steam explosion can be an effective method for the camellia seed oil extraction.
Bacterial content and associated risk factors influencing the quality of bulk tank milk collected from dairy cattle farms in Mandalay Region
Authors: Naing Ye Wint , Wai Soe Soe , Lin Thant Nyi , Thu Wink Phyo , Htun Lat Lat , Bawm Saw , Myaing Tin Tin 
Published: February 2019

AbstractTo investigate the bacterial content and risk factors associated with the hygienic quality of raw milk, a cross‐sectional study was conducted in four townships of Mandalay Region, Myanmar. From April to October 2017, bulk tank milk samples (n = 233) were collected from 233 dairy cattle farms located in Tada‐U, Pyin Oo Lwin, Meiktila, and Patheingyi Townships. From each farm, approximately 100 ml of bulk tank milk was collected and examined for bacterial content. Total bacterial count (TBC) and coliform count (CC) in milk samples were determined using milk agar and violet red bile agar. Of 233 milk samples, 68.2% (159/233) showed TBC higher than 1.0 × 105 cfu/ml, and 78.4% (183/233) showed CC higher than 100 cfu/ml. The mean value of TBC among 233 farms was 2.55 × 107 cfu/ml, ranging from 6.0 × 103 to 3.0 × 109 cfu/ml, whereas the mean value of CC was 1.59 × 105 cfu/ml, ranging from 10 to 8.4 × 106 cfu/ml. TBC tended to increase as CC increased in milk samples. The number of precautionary measures for milking operation, choice of cleaning materials, training experience of the farmers, cleanliness score of milking cows, and CMT scores of milk were significantly associated (p < 0.05) with TBC in bulk tank milk. Similarly, the number of precautionary measures for milking operation, choice of cleaning materials, training experience of the farmers, cleanliness scores of milking cows, CMT scores of milk samples, herd size, and type of milking practice showed significant association (p < 0.05) with CC in bulk tank milk. The effects of these potential risk factors should be minimized, farmers should be trained properly, and technical support should be provided, so that the quality of raw milk produced in Myanmar can be improved.