bluuebunny/crossref_metadata_2025_split huggingface dataset:
Non-pharmacological Intervention for Chronic Pain in Veterans: A Pilot Study of Heart Rate Variability Biofeedback
Authors: Berry Melanie E. , Chapple Iva T. , Ginsberg Jay P. , Gleichauf Kurt J. , Meyer Jeff A. , Nagpal Madan L. 
Published: April 2014

Objective: Chronic pain is an emotionally and physically debilitating form of pain that activates the body's stress response and over time can result in lowered heart rate variability (HRV) power, which is associated with reduced resiliency and lower self-regulatory capacity. This pilot project was intended to determine the effective-ness of HRV coherence biofeedback (HRVCB) as a pain and stress management intervention for veterans with chronic pain and to estimate the effect sizes. It was hypothesized that HRVCB will increase parasympathetic activity resulting in higher HRV coherence measured as power and decrease self-reported pain symptoms in chronic pain patients. Study design: Fourteen veterans receiving treatment for chronic pain were enrolled in the pre-post intervention study. They were randomly assigned, with 8 subjects enrolled in the treatment group and 6 in the control group. The treatment group received biofeedback intervention plus standard care, and the other group received standard care only. The treatment group received four HRVCB training sessions as the intervention. Measures: Pre-post measurements of HRV amplitude, HRV power spectrum variables, cardiac coherence, and self-ratings of perceived pain, stress, negative emotions, and physical activity limitation were made for both treatment and control groups. Results: The mean pain severity for all subjects at baseline, using the self-scored Brief Pain Inventory (BPI), was 26.71 (SD=4.46; range=21—35) indicating a moderate to severe perceived pain level across the study subjects. There was no significant difference between the treatment and control groups at baseline on any of the measures. Post-HRVCB, the treatment group was significantly higher on coherence (P=.01) and lower (P=.02) on pain ratings than the control group. The treatment group showed marked and statistically significant (1-tailed) increases over the baseline in coherence ratio (191%, P=.04) and marked, significant (1-tailed) reduction in pain ratings (36%, P<.001), stress perception (16%, P=.02), negative emotions (49%, P<.001), and physical activity limitation (42%, P<.001). Significant between-group effects on all measures were found when pre-training values were used as covariates. Conclusions: HRVCB intervention was effective in increasing HRV coherence measured as power in the upper range of the LF band and reduced perceived pain, stress, negative emotions, and physical activity limitation in veterans suffering from chronic pain. HRVCB shows promise as an effective non-pharmacological intervention to support standard treatments for chronic pain.
Substorm occurrence during quiet solar wind driving
Authors: Pulkkinen T. I. , Partamies N. , Kilpua E. K. J. 
Published: April 2014

AbstractWe examine the OMNI database and International Monitor for Auroral Geomagnetic Effects (IMAGE) magnetometer chain records to study the substorm occurrence and characteristics during quiet solar driving periods, especially during the solar minimum period in 2009. We define substorm‐like activations as periods where the hourly average AL is below −200 nT. Using the OMNI data set, we demonstrate that there are limiting solar wind speed, interplanetary magnetic field magnitude, and driving electric field values below which substorm‐like activations (AL < 200 nT, intensification and decay of the electrojet) do not occur. These minimum parameter values are V < 266 km/s, B < 1.4 nT, and E < 0.025 mV/m; such low values are observed less than 1% of the time. We also show that for the same level of driving solar wind electric field, the electrojet intensity is smaller (by few tens of nT), and the electrojet resides farther poleward (by over 1°) during extended quiet solar driving in 2009 than during average solar activity conditions. During the solar minimum period in 2009, we demonstrate that substorm‐like activations can be identified from the IMAGE magnetometer chain observations during periods when the hourly average IL index is below −100 nT. When the hourly IL activity is smaller than that, which covers 87% of the nighttime observations, the electrojet does not show coherent behavior. We thus conclude that substorm recurrence time during very quiet solar wind driving conditions is about 5–8 h, which is almost double that of the average solar activity conditions.
Differentiating maturational influence on training‐induced strength and endurance adaptations in prepubescent children
Authors: Marta Carlos C. , Marinho Daniel A. , Izquierdo Mikel , Marques Mário C. 
Published: April 2014

ABSTRACTObjectiveTo analyze the effect of biological maturation on training‐induced strength and endurance adaptations in the prepubertal growth spurt.MethodsOne hundred and twenty‐five healthy children (58 boys, 67 girls), aged 10–11 years old (10.8 ± 0.4 years), who were self‐assessed as belonging to Tanner stages I and II, were randomly divided into two experimental groups, a strength training group (19 boys, 22 girls) and an endurance training group (21 boys, 24 girls) that would train twice a week for 8 weeks, as well as a control group (18 boys, 21 girls; no training program).ResultsAfter 8 weeks of training, there were improvements in all strength and endurance measures (P < 0.01) for both groups of Tanner stage I and II children. No significant differences in training response were observed relative to biological maturity or gender (P > 0.05).ConclusionsThese data suggest that more biologically mature prepubescent children seem to have no advantage in training‐induced strength and endurance adaptations compared with their less mature peers. Additionally, gender did not affect the training‐induced changes in strength or aerobic fitness. These results are meaningful for the development of optimized well‐rounded training programs in prepubertal children. Am. J. Hum. Biol. 26:469–475, 2014. © 2014 Wiley Periodicals, Inc.
Rhodium(II)‐Catalyzed Intramolecular Annulation of 1‐Sulfonyl‐1,2,3‐Triazoles with Pyrrole and Indole Rings: Facile Synthesis of N‐Bridgehead Azepine Skeletons
Authors: Yang Jin‐Ming , Zhu Cheng‐Zhi , Tang Xiang‐Ying , Shi Min 
Published: April 2014

AbstractA convenient and efficient synthetic method has been developed to construct highly functionalized N‐bridgehead azepine skeletons, which are of great importance in biological and pharmaceutical industry. The reaction proceeds through a rhodium(II) azavinyl carbene intermediate, which initiated the intramolecular CH functionalization with pyrrolyl and indolyl rings. A variety of azepine derivatives were obtained in moderate to good yields under mild reaction conditions with high chemoselectivity. Several interesting derivatizations of the resulting products demonstrate that this method is synthetically valuable and useful.
[B30]−: A Quasiplanar Chiral Boron Cluster
Authors: Li Wei‐Li , Zhao Ya‐Fan , Hu Han‐Shi , Li Jun , Wang Lai‐Sheng 
Published: April 2014

AbstractChirality is vital in chemistry. Its importance in atomic clusters has been recognized since the discovery of the first chiral fullerene, the D2 symmetric C76.1 A number of gold clusters have been found to be chiral,2 raising the possibility to use them as asymmetric catalysts. The discovery of clusters with enantiomeric structures is essential to design new chiral materials with tailored chemical and physical properties.3 Herein we report the first inherently chiral boron cluster of [B30]− in a joint photoelectron spectroscopy and theoretical study. The most stable structure of [B30]− is found to be quasiplanar with a hexagonal hole. Interestingly, a pair of enantiomers arising from different positions of the hexagonal hole are found to be degenerate in our global minimum searches and both should co‐exist experimentally because they have identical electronic structures and give rise to identical simulated photoelectron spectra.
Development of a melt‐extrudable biobased soy flour/polyethylene blend for multilayer film applications
Authors: Thellen Christopher , Hauver Corey , Ratto Jo Ann 
Published: April 2014

ABSTRACTMonolayer and multilayer films from biobased linear low‐density polyethylene and milled soy flour were produced through cast film coextrusion processes using conventional thermoplastic processing equipment. Films containing 10 and 20% by weight of soy flour milled to maximum particle sizes of 8, 11, and 22 µm were extruded and characterized as a packaging film material. Water resistance, tensile properties, and gas permeability were measured on each film and analyzed with respects to the soy particle size, soy loading, and layer configuration in the multilayer film structure. Mechanical properties results indicated that ultimate elongation of the soy‐containing films decreased by as much as 14% compared to the control, while tensile strength and maximum load testing did not reveal any identifiable trends. Monolayer soy‐containing film showed high moisture sensitivity, as measured by contact angle and absorption testing, while the multilayer films demonstrated a more hydrophobic nature as indicated by higher contact angle measurements. This increase in hydrophobic properties is due to protective polyolefin skin layers, which are more hydrophobic. Oxygen transmission rates of the multilayer films decreased by 38% due to the presence of soy flour as compared to the control that did not contain any soy flour. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40707.
Environmental Innovations and Internationalization: Theory and Practices
Authors: Chiarvesio Maria , Marchi Valentina De , Maria Eleonora Di 
Published: April 2014

AbstractBased on original data on Italian firms specializing in medium‐ and low‐tech industries, we study the relationship between firms’ upstream and downstream internationalization and their propensity to introduce products or processes that reduce environmental impact. Preliminary evidence suggests that geography plays an important role in green firms’ activities and supply chains. More precisely, results suggest that firms that outsource to and rely on non‐local suppliers are less likely to engage in environmental innovations. Moreover, we verify that firms engaged in export activities play a similar and negative role, regardless of the export intensity and typology of foreign markets (i.e. developed versus emerging). Tapping global flows of knowledge by being a part of a multinational group positively spurs the development of green innovations, as for FDIs. Copyright © 2014 John Wiley & Sons, Ltd and ERP Environment
Quaternary Sulfide Ba6Zn6ZrS14: Synthesis, Crystal Structure, Band Structure, and Multiband Physical Properties
Authors: Zhang Xian , He Jianqiao , Chen Wei , Zhang Ketian , Zheng Chong , Sun Junliang , Liao Fuhui , Lin Jianhua , Huang Fuqiang 
Published: April 2014

AbstractBa6Zn6ZrS14 was synthesized by a traditional salt‐melt method with KI as flux. The pale yellow crystals of Ba6Zn6ZrS14 crystallize in the tetragonal space group I4/mcm with a=16.3481 (4) Å and c=9.7221(6) Å. The structure features unique one‐dimensional parallel [Zn6S9]6− and [ZrS5]6− straight chains. The D2h‐symmetric [Zn6S9]6− cluster serves as the building block of the [Zn6S9]6− chains. A powder sample was investigated by X‐ray diffraction, optical absorption, and photoluminescence measurements. The compound shows multiple‐absorption character with three optical absorption edges around 1.78, 2.50, and 2.65 eV, respectively, which are perfectly consistent with the results of first‐principles calculations. Analysis of the density of states further revealed that the three optical absorption bands are attributable to the three S(3p6)→Zr(4d0) transitions due to the splitting of the Zr 4d orbitals in the D4h crystal field. The multiband nature of Ba6Zn6ZrS14 also results in photocatalytic activity under visible‐light irradiation and three band‐edge emissions.
Enhanced Formaldehyde‐Vapor Adsorption Capacity of Polymeric Amine‐Incorporated Aminosilicas
Authors: Nomura Akihiro , Jones Christopher W. 
Published: April 2014

AbstractAirborne formaldehyde, which is a highly problematic volatile organic compound (VOC) pollutant, is adsorbed by polymeric amine‐incorporated silicas (aminosilicas), and the factors that affect the adsorption performance are systematically investigated. Three different types of polymeric amines 1) poly(ethyleneimine) branched (PEIBR); 2) poly(ethyleneimine) linear (PEILI); and 3) poly(allylamine) (PAA) are impregnated into two types of porous silicas [SBA‐15 and mesocellular foam (MCF) silicas] with systematic changes of the amine loadings. The adsorption results demonstrate that the adsorption capacity increases along with the amine loading until the polymeric amines completely fill the silica pores. This results in the MCF silica, which has a larger pore volume and hence can accommodate more polymeric amine before completely filling the pore, giving materials that adsorb more formaldehyde, with the largest adsorption capacity, q, of up to 5.7 mmolHCHO g−1 among the samples studied herein. Of the three different types of polymers, PAA, comprised of 100 % primary amines, showed the highest amine efficiency μ (mmolHCHO/mmolN) for capturing formaldehyde. The chemical structures of the adsorbed formaldehyde are analyzed by 13C cross‐polarization magic‐angle spinning (CP‐MAS) NMR, and it is demonstrated that the adsorbed formaldehyde is chemically attached to the aminosilica surface, forming hemiaminal and imine species. Because the chemical adsorption of formaldehyde forms covalent bonds, it is not desorbed from the aminosilicas below 130 °C based on temperature‐programed‐desorption (TPD) analysis. The high formaldehyde‐adsorption capacity and stability of the trapped formaldehyde on the amine surface in this study reveal the potential utility of aminosilicas as formaldehyde abatement materials.
Dual Protection of Sulfur by Carbon Nanospheres and Graphene Sheets for Lithium–Sulfur Batteries
Authors: Wang Bei , Wen Yanfen , Ye Delai , Yu Hua , Sun Bing , Wang Guoxiu , Hulicova‐Jurcakova Denisa , Wang Lianzhou 
Published: April 2014

AbstractWell‐confined elemental sulfur was implanted into a stacked block of carbon nanospheres and graphene sheets through a simple solution process to create a new type of composite cathode material for lithium–sulfur batteries. Transmission electron microscopy and elemental mapping analysis confirm that the as‐prepared composite material consists of graphene‐wrapped carbon nanospheres with sulfur uniformly distributed in between, where the carbon nanospheres act as the sulfur carriers. With this structural design, the graphene contributes to direct coverage of sulfur to inhibit the mobility of polysulfides, whereas the carbon nanospheres undertake the role of carrying the sulfur into the carbon network. This composite achieves a high loading of sulfur (64.2 wt %) and gives a stable electrochemical performance with a maximum discharge capacity of 1394 mAh g−1 at a current rate of 0.1 C as well as excellent rate capability at 1 C and 2 C. The improved electrochemical properties of this composite material are attributed to the dual functions of the carbon components, which effectively restrain the sulfur inside the carbon nano‐network for use in lithium–sulfur rechargeable batteries.
ChemInform Abstract: Li18Na2Ge17 — A Compound Demonstrating Cation Effects on Cluster Shapes and Crystal Packing in Ternary Zintl Phases.
Authors: Scherf Lavinia M. , Zeilinger Michael , Faessler Thomas F. 
Published: April 2014

AbstractThe new title compound is synthesized from a stoichiometric mixture of the constituent elements (tantalum ampule, 750 °C, 1 h) and characterized by single crystal XRD and magnetic measurements.
ChemInform Abstract: Atomic Structure of Defects in Anion‐Deficient Perovskite‐Based Ferrites with a Crystallographic Shear Structure.
Authors: Batuk Maria , Turner Stuart , Abakumov Artem M. , Batuk Dmitry , Hadermann Joke , Van Tendeloo Gustaaf 
Published: April 2014

AbstractPb2Sr2Bi2Fe6O16 is prepared by solid state reaction of PbO, SrCO3, Bi2O3, and Fe2O3 (annealing in air at 750 and 850 °C for 24 h each).
ChemInform Abstract: Nickel(II) Uranium(IV) Trisulfide.
Authors: Ward Matthew D. , Ibers James A. 
Published: April 2014

AbstractBlack prisms of NiUS3 and platelets of NiU8S17 as a side product are obtained from the reaction of Ni, U, S, and GeI2 in a CsCl flux (evacuated silica tube, 1073 K, 96 h).
ChemInform Abstract: Complex Magnetic Behavior in the PrSr3 (Fe1‐xCox)3O10‐δ n = 3 Ruddlesden—Popper‐Type Solid Solution with High Valent Cobalt and Iron.
Authors: Jantsky L. , Okamoto H. , Thomas M. , Karen P. , Hauback B. C. , Rosseinsky M. J. , Fjellvaag H. 
Published: April 2014

AbstractThe Ruddlesden—Popper‐type solid solutions of title (x ≤ 0.60: δ < 0.10) are synthesized from mixtures of Sr(NO3)2, Pr(NO3)3, Fe, Co, and citric acid in concentrated HNO3 (calcination at 873 K, 24 h, followed by firing twice in air at 1323 and 1523 K for 15 and 25 h, resp., and at 1623 K for 15 h).
ChemInform Abstract: Transition Metal Complexes Containing Dihydrogen Hypodiphosphate in Eclipsed Conformation as Ligand: Preparation, Crystal Structure, Vibrational Spectra, and Thermal Behavior of K2 [M(H2P2O6)2 (H2O)2]·H2O (M: Co, Ni, Cu, and Zn).
Authors: Gjikaj Mimoza , Wu Peng 
Published: April 2014

AbstractThe title compounds are prepared by simple reaction of MCO3 (M: Co, Ni, Cu, and Zn), H4P2P6, and KOH in aqueous solution at room temperature.
ChemInform Abstract: New Quaternary Rare‐Earth Chalcogenides BaLnSn2Q6 (Ln: Ce, Pr, Nd, Q: S; Ln: Ce, Q: Se): Synthesis, Structure, and Magnetic Properties.
Authors: Feng Kai , Zhang Xu , Yin Wenlong , Shi Youguo , Yao Jiyong , Wu Yicheng 
Published: April 2014

AbstractThe title compounds are synthesized by solid state reaction of stoichiometric mixtures of BaQ, SnQ2, Ln, and Q (1323 K, 48 h) and characterized by single crystal XRD and magnetic susceptibility measurements.
ChemInform Abstract: Surfactant‐Thermal Method to Synthesize a Novel Two‐Dimensional Oxochalcogenide.
Authors: Gao Junkuo , Tay Qiuling , Li Pei‐Zhou , Xiong Wei‐Wei , Zhao Yanli , Chen Zhong , Zhang Qichun 
Published: April 2014

AbstractMn3Sb4S8(OH)2 (N2H4)2 is synthesized by reaction of Mn powder, Sb2S5, sulfur, N2H4·H2O, and hexadecyltributylphosphonium bromide as surfactant (autoclave, 175 °C, 7 d; 23% yield).
ChemInform Abstract: Copper(I)/ABNO‐Catalyzed Aerobic Alcohol Oxidation: Alleviating Steric and Electronic Constraints of Cu/TEMPO Catalyst Systems.
Authors: Steves Janelle E. , Stahl Shannon S. 
Published: April 2014

AbstractThe title catalyst system mediates aerobic oxidation of all classes of alcohols, including primary and secondary allylic, benzylic, and aliphatic alcohols, with nearly equal efficiency.
ChemInform Abstract: Activity of B(OEt)3‐MCM‐41 Catalyst in the MPV Reduction of Crotonaldehyde.
Authors: Uysal Burcu 
Published: April 2014

AbstractAn essentially new boron alkoxide based heterogeneous catalyst is designed which possesses sufficient activity in the Meerwein—Ponndorf—Verley reduction of crotonaldehyde.
ChemInform Abstract: A Convenient Alumination of Functionalized Aromatics by Using the Frustrated Lewis Pair Et3Al and TMPMgCl·LiCl.
Authors: Unsinn Andreas , Wunderlich Stefan H. , Jana Anukul , Karaghiosoff Konstantin , Knochel Paul 
Published: April 2014

AbstractAn efficient method for in situ alumination of electron‐rich aromatics is developed.
ChemInform Abstract: Tetrabutylammonium Bromide Catalyzed Tandem Addition/Cyclization of o‐Aralkynylaryl Aldehydes with Trimethyl(trifluoromethyl)silane: Synthesis of Trifluoromethyl Group Containing Phthalans.
Authors: Hu Bo‐Lun , Li Chun‐Lin , Liao Zhi‐Yong , Zhang Xing‐Guo 
Published: April 2014

AbstractThe regio‐ and stereospecific reaction shows good functional group tolerance and provides (Z)‐1‐alkylidene‐3‐(trifluoromethyl)phthalans in moderate to excellent yields.
ChemInform Abstract: Copper‐Catalyzed α‐Aminoxylation of Ketones with 2,2,6,6‐Tetramethylpiperidine‐1‐oxyl (TEMPO).
Authors: Xie Ye‐Xiang , Song Ren‐Jie , Liu Yu , Liu Yan‐Yun , Xiang Jian‐Nan , Li Jin‐Heng 
Published: April 2014

AbstractAn efficient copper‐catalyzed α‐aminoxylation of ketones with 2,2,6,6‐tetramethylpiperidine‐1‐oxyl (TEMPO) is presented.The copper on iron catalyst can be recovered and reused several times with high catalytic reactivity.
ChemInform Abstract: Synthesis and Properties of α‐Bromomethyl‐Substituted β‐Ethoxyvinyl Polyfluoroalkyl Ketones.
Authors: Bugera Maksym Ya. , Tarasenko Karen V. , Kukhar Valery P. , Roeschenthaler Gerd‐Volker , Gerus Igor I. 
Published: April 2014

AbstractEnones are valuable synthetic blocks for the preparation of compounds of potentially high biological and pharmaceutical activity.
ChemInform Abstract: Copper‐Catalyzed One‐Pot Oxidation—Aldol/Henry Reaction of Benzylic Amines to α,β‐Unsaturated Methyl Ketone/Nitro Compounds.
Authors: Liu Jia , Zhu Xiao‐Rui , Ren Jiangmeng , Chen Wei‐Dong , Zeng Bu‐Bing 
Published: April 2014

AbstractA facile and novel one‐pot procedure for the oxidation of benzylic amines and subsequent condensation with acetone or nitromethane to afford α,β‐unsaturated ketones or nitro compounds is presented.
ChemInform Abstract: Stereoselective Synthesis of Vinyl Triflones and Heteroaryl Triflones Through Anionic O→Cvinyl and N→Cvinyl Trifluoromethanesulfonyl Migration Reactions.
Authors: Xu Xiu‐Hua , Taniguchi Misaki , Wang Xin , Tokunaga Etsuko , Ozawa Tomohiro , Masuda Hideki , Shibata Norio 
Published: April 2014

AbstractTreatment of various dibromovinylphenyl triflates or related compounds with BuLi results in an intramolecular triflyl migration to produce (E)‐configured vinyl triflones.
ChemInform Abstract: Synthesis of Highly Basic Hexasubstituted Biguanides by Environmentally Friendly Methods.
Authors: Glasovac Zoran , Troselj Pavle , Jusinski Iva , Margetic Davor , Eckert‐Maksic Mirjana 
Published: April 2014

AbstractVarious methods such as high speed vibrational milling, high pressure, ultrasound, microwave irradiation, and conventional heating conditions are employed for the reaction of tetramethylguanidine with carbodiimides.
ChemInform Abstract: Hypervalent Iodine‐Mediated Oxidative Cyclization of p‐Hydroxy Acetanilides to 1,2‐Dispirodienones.
Authors: Chabaud Laurent , Hromjakova Tatiana , Rambla Matt , Retailleau Pascal , Guillou Catherine 
Published: April 2014

AbstractThe described method, giving a new stable class of 1,2‐dispirodienone lactams, can be applied to a broad range of substrates with good yields.
ChemInform Abstract: Cu(OTf)2‐Mediated Fluorination of Aryltrifluoroborates with Potassium Fluoride.
Authors: Ye Yingda , Schimler Sydonie D. , Hanley Patrick S. , Sanford Melanie S. 
Published: April 2014

AbstractCopper plays a dual role: to coordinate both the aryl and fluoride ligands and to serve as an oxidant generating the reactive Cu(III) key intermediate.
ChemInform Abstract: Microwave‐Assisted Synthesis of Substituted Fluorophenyl Mono‐ and Diazides by SNAr. A Fast Methodology to Prepare Photoaffinity Labeling and Crosslinking Reagents.
Authors: Leyva Elisa , Leyva Socorro , Moctezuma Edgar , Gonzalez‐Balderas Regina M. , de Loera Denisse 
Published: April 2014

AbstractThe SNAr reaction of substituted perfluorobenzenes with NaN3 is studied.
ChemInform Abstract: Synthesis of Poly‐Substituted Benzene Derivatives via [3 + 3] Annulation Protocol from Morita—Baylis—Hillman Adducts and Glutaconates.
Authors: Lim Jin Woo , Kim Se Hee , Yu Jin , Kim Jae Nyoung 
Published: April 2014

AbstractTitle reaction leads to various polysubstituted benzene derivatives bearing 1,3‐dicarboxylate groups of type (III) or (V).