bluuebunny/crossref_metadata_2025 huggingface dataset:
Genetic Variability and Phylogenetic Analysis of Han Population from Guanzhong Region of China based on 21 non-CODIS STR Loci
Authors: Zhang Yu-Dang , Tang Xiao-Li , Meng Hao-Tian , Wang Hong-Dan , Jin Rui , Yang Chun-Hua , Yan Jiang-Wei , Yang Guang , Liu Wen-Juan , Shen Chun-Mei , Zhu Bo-Feng
Published: March 2015

In the present study, we presented the population genetic data and their forensic parameters of 21 non-CODIS autosomal STR loci in Chinese Guanzhong Han population. A total of 166 alleles were observed with corresponding allelic frequencies ranging from 0.0018 to 0.5564. No STR locus was observed to deviate from the Hardy-Weinberg equilibrium and linkage disequilibriums after applying Bonferroni correction. The cumulative power of discrimination and probability of exclusion of all the 21 STR loci were 0.99999999999999999993814 and 0.999998184, respectively. The results of genetic distances, phylogenetic trees and principal component analysis revealed that the Guanzhong Han population had a closer relationship with Ningxia Han, Tujia and Bai groups than other populations tested. In summary, these 21 STR loci showed a high level of genetic polymorphisms for the Guanzhong Han population and could be used for forensic applications and the studies of population genetics.
Freely designable optical frequency conversion in Raman-resonant four-wave-mixing process
Authors: Zheng Jian , Katsuragawa Masayuki
Published: March 2015

Nonlinear optical processes are governed by the relative-phase relationships among the relevant electromagnetic fields in these processes. In this Report, we describe the physics of arbitrary manipulation of Raman-resonant four-wave-mixing process by artificial control of relative phases. As a typical example, we show freely designable optical-frequency conversions to extreme spectral regions, mid-infrared and vacuum-ultraviolet, with near-unity quantum efficiencies. Furthermore, we show that such optical-frequency conversions can be realized by using a surprisingly simple technology where transparent plates are placed in a nonlinear optical medium and their positions and thicknesses are adjusted precisely. In a numerical simulation assuming practically applicable parameters in detail, we demonstrate a single-frequency tunable laser that covers the whole vacuum-ultraviolet spectral range of 120 to 200 nm.
Human iPSC-based Cardiac Microphysiological System For Drug Screening Applications
Authors: Mathur Anurag , Loskill Peter , Shao Kaifeng , Huebsch Nathaniel , Hong SoonGweon , Marcus Sivan G. , Marks Natalie , Mandegar Mohammad , Conklin Bruce R. , Lee Luke P. , Healy Kevin E.
Published: March 2015

Drug discovery and development are hampered by high failure rates attributed to the reliance on non-human animal models employed during safety and efficacy testing. A fundamental problem in this inefficient process is that non-human animal models cannot adequately represent human biology. Thus, there is an urgent need for high-content in vitro systems that can better predict drug-induced toxicity. Systems that predict cardiotoxicity are of uppermost significance, as approximately one third of safety-based pharmaceutical withdrawals are due to cardiotoxicty. Here, we present a cardiac microphysiological system (MPS) with the attributes required for an ideal in vitro system to predict cardiotoxicity: i) cells with a human genetic background; ii) physiologically relevant tissue structure (e.g. aligned cells); iii) computationally predictable perfusion mimicking human vasculature; and, iv) multiple modes of analysis (e.g. biological, electrophysiological and physiological). Our MPS is able to keep human induced pluripotent stem cell derived cardiac tissue viable and functional over multiple weeks. Pharmacological studies using the cardiac MPS show half maximal inhibitory/effective concentration values (IC50/EC50) that are more consistent with the data on tissue scale references compared to cellular scale studies. We anticipate the widespread adoption of MPSs for drug screening and disease modeling.
Controllable Thermal Rectification Realized in Binary Phase Change Composites
Authors: Chen Renjie , Cui Yalong , Tian He , Yao Ruimin , Liu Zhenpu , Shu Yi , Li Cheng , Yang Yi , Ren Tianling , Zhang Gang , Zou Ruqiang
Published: March 2015

Phase transition is a natural phenomenon happened around our daily life, represented by the process from ice to water. While melting and solidifying at a certain temperature, a high heat of fusion is accompanied, classified as the latent heat. Phase change material (PCM) has been widely applied to store and release large amount of energy attributed to the distinctive thermal behavior. Here, with the help of nanoporous materials, we introduce a general strategy to achieve the binary eicosane/PEG4000 stuffed reduced graphene oxide aerogels, which has two ends with different melting points. It's successfully demonstrated this binary PCM composites exhibits thermal rectification characteristic. Partial phase transitions within porous networks instantaneously result in one end of the thermal conductivity saltation at a critical temperature and therefore switch on or off the thermal rectification with the coefficient up to 1.23. This value can be further raised by adjusting the loading content of PCM. The uniqueness of this device lies in its performance as a normal thermal conductor at low temperature, only exhibiting rectification phenomenon when temperature is higher than a critical value. The stated technology has broad applications for thermal energy control in macroscopic scale such as energy-efficiency building or nanodevice thermal management.
Irisin – a myth rather than an exercise-inducible myokine
Authors: Albrecht Elke , Norheim Frode , Thiede Bernd , Holen Torgeir , Ohashi Tomoo , Schering Lisa , Lee Sindre , Brenmoehl Julia , Thomas Selina , Drevon Christian A. , Erickson Harold P. , Maak Steffen
Published: March 2015

The myokine irisin is supposed to be cleaved from a transmembrane precursor, FNDC5 (fibronectin type III domain containing 5) and to mediate beneficial effects of exercise on human metabolism. However, evidence for irisin circulating in blood is largely based on commercial ELISA kits which are based on polyclonal antibodies (pAbs) not previously tested for cross-reacting serum proteins. We have analyzed four commercial pAbs by Western blotting, which revealed prominent cross-reactivity with non-specific proteins in human and animal sera. Using recombinant glycosylated and non-glycosylated irisin as positive controls, we found no immune-reactive bands of the expected size in any biological samples. A FNDC5 signature was identified at ~20 kDa by mass spectrometry in human serum but was not detected by the commercial pAbs tested. Our results call into question all previous data obtained with commercial ELISA kits for irisin and provide evidence against a physiological role for irisin in humans and other species.
Metabolomic identification of biochemical changes induced by fluoxetine and imipramine in a chronic mild stress mouse model of depression
Authors: Zhao Jing , Jung Yang-Hee , Jang Choon-Gon , Chun Kwang-Hoon , Kwon Sung Won , Lee Jeongmi
Published: March 2015

Metabolomics was applied to a C57BL/6N mouse model of chronic unpredictable mild stress (CMS). Such mice were treated with two antidepressants from different categories: fluoxetine and imipramine. Metabolic profiling of the hippocampus was performed using gas chromatography-mass spectrometry analysis on samples prepared under optimized conditions, followed by principal component analysis, partial least squares-discriminant analysis and pair-wise orthogonal projections to latent structures discriminant analyses. Body weight measurement and behavior tests including an open field test and the forced swimming test were completed with the mice as a measure of the phenotypes of depression and antidepressive effects. As a result, 23 metabolites that had been differentially expressed among the control, CMS and antidepressant-treated groups demonstrated that amino acid metabolism, energy metabolism, adenosine receptors and neurotransmitters are commonly perturbed by drug treatment. Potential predictive markers for treatment effect were identified: myo-inositol for fluoxetine and lysine and oleic acid for imipramine. Collectively, the current study provides insights into the molecular mechanisms of the antidepressant effects of two widely used medications.
P38/MAPK contributes to endothelial barrier dysfunction via MAP4 phosphorylation-dependent microtubule disassembly in inflammation-induced acute lung injury
Authors: Li Lingfei , Hu Jiongyu , He Ting , Zhang Qiong , Yang Xu , Lan Xiaodong , Zhang Dongxia , Mei Hao , Chen Bing , Huang Yuesheng
Published: March 2015

Excessive activation of inflammation and the accompanying lung vascular endothelial barrier disruption are primary pathogenic features of acute lung injury (ALI). Microtubule-associated protein 4 (MAP4), a tubulin assembly-promoting protein, is important for maintaining the microtubule (MT) cytoskeleton and cell-cell junctional structures. However, both the involvement and exact mechanism of MAP4 in the development of endothelial barrier disruption in ALI remains unknown. In this study, lipopolysaccharide (LPS) and tumour necrosis factor-α (TNF-α) were applied to human pulmonary microvascular endothelial cells (HPMECs) to mimic the endothelial damage during inflammation in vitro. We demonstrated that the MAP4 (Ser696 and Ser787) phosphorylation increased concomitantly with the p38/MAPK pathway activation by the LPS and TNF-α stimulation of HPMECs, which induced MT disassembly followed by hyperpermeability. Moreover, the application of taxol, the overexpression of a MAP4 (Ala) mutant, or the application of the p38/MAPK inhibitor SB203580 inhibited the MT disruption and the intracellular junction dysfunction. In contrast, MKK6 (Glu), which constitutively activated p38/MAPK, resulted in microtubule depolymerisation and, subsequently, hyperpermeability. Our findings reveal a novel role of MAP4 in endothelial barrier dysfunction.
Tumor cell secretion of soluble factor(s) for specific immunosuppression
Authors: Kano Arihiro
Published: March 2015

Studies of tumor models using syngeneic transplantation have advanced our understanding of tumor immunity, including both immune surveillance and evasion. Murine mammary carcinoma 4T1 cells secrete immunosuppressive soluble factors as demonstrated in splenocyte culture. Cultured primary splenocytes secrete IFN-γ, which was strikingly elevated when the cells were isolated from 4T1 tumor-bearing mice. The secretion of IFN-γ peaked a week after 4T1 inoculation and then declined. This reduction may be due to the relatively decreased lymphocytes and increased granulocytes in a spleen accompanied by splenomegaly with time after the 4T1 inoculation. IFN-γ production was further suppressed with the addition of the conditioned media from 4T1 cells to the splenocyte culture. This suppressive effect was more evident in the splenocytes isolated from mice that had 4T1 tumors for a longer period of time and was not observed in the conditioned medium either from CT26 cells or with splenocytes isolated from CT26 tumor-bearing mice. These results suggest that the IFN-γ suppression is 4T1 tumor-specific. The soluble factor(s) in the 4T1-conditioned media was a protein between 10 to 100 kDa. The cytokine tip assay demonstrated several known cytokines that negatively regulate immune responses and may be candidates for this immunosuppression activity.
Superior broadband antireflection from buried Mie resonator arrays for high-efficiency photovoltaics
Authors: Zhong Sihua , Zeng Yang , Huang Zengguang , Shen Wenzhong
Published: March 2015

Establishing reliable and efficient antireflection structures is of crucial importance for realizing high-performance optoelectronic devices such as solar cells. In this study, we provide a design guideline for buried Mie resonator arrays, which is composed of silicon nanostructures atop a silicon substrate and buried by a dielectric film, to attain a superior antireflection effect over a broadband spectral range by gaining entirely new discoveries of their antireflection behaviors. We find that the buried Mie resonator arrays mainly play a role as a transparent antireflection structure and their antireflection effect is insensitive to the nanostructure height when higher than 150 nm, which are of prominent significance for photovoltaic applications in the reduction of photoexcited carrier recombination. We further optimally combine the buried Mie resonator arrays with micron-scale textures to maximize the utilization of photons and thus have successfully achieved an independently certified efficiency of 18.47% for the nanostructured silicon solar cells on a large-size wafer (156 mm × 156 mm).
Mechanisms shaping size structure and functional diversity of phytoplankton communities in the ocean
Authors: Acevedo-Trejos Esteban , Brandt Gunnar , Bruggeman Jorn , Merico Agostino
Published: March 2015

The factors regulating phytoplankton community composition play a crucial role in structuring aquatic food webs. However, consensus is still lacking about the mechanisms underlying the observed biogeographical differences in cell size composition of phytoplankton communities. Here we use a trait-based model to disentangle these mechanisms in two contrasting regions of the Atlantic Ocean. In our model, the phytoplankton community can self-assemble based on a trade-off emerging from relationships between cell size and (1) nutrient uptake, (2) zooplankton grazing and (3) phytoplankton sinking. Grazing ‘pushes’ the community towards larger cell sizes, whereas nutrient uptake and sinking ‘pull’ the community towards smaller cell sizes. We find that the stable environmental conditions of the tropics strongly balance these forces leading to persistently small cell sizes and reduced size diversity. In contrast, the seasonality of the temperate region causes the community to regularly reorganize via shifts in species composition and to exhibit, on average, bigger cell sizes and higher size diversity than in the tropics. Our results raise the importance of environmental variability as a key structuring mechanism of plankton communities in the ocean and call for a reassessment of the current understanding of phytoplankton diversity patterns across latitudinal gradients.
A multi-functional oil–water separator from a selectively pre-wetted superamphiphobic paper
Authors: Ge Dengteng , Yang Lili , Wang Chenbo , Lee Elaine , Zhang Yongquan , Yang Shu
Published: March 2015

A multi-functional, gravity-driven oil–water separator is prepared by pre-wetting a superamphiphobic nanoparticle coated paper towel, which can selectively separate water or oil with high efficiency and flux.
One-step synthesis of high-quality homogenous Te/Se alloy nanorods with various morphologies
Authors: Fu Shilin , Cai Kai , Wu Long , Han Heyou
Published: March 2015

A convenient method was developed for controllable synthesis of homogeneous trigonal Te/Se alloy nanorods (t-Te/Se ANRs) with diverse morphologies, aspect ratios and compositions at room temperature in aqueous solution.
Mechanisms of cholesterol and saturated fatty acid lowering by Quillaja saponaria extract, studied by in vitro digestion model
Authors: Vinarova Liliya , Vinarov Zahari , Damyanova Borislava , Tcholakova Slavka , Denkov Nikolai , Stoyanov Simeon
Published: March 2015

High molecular weight polyphenols inQuillaja saponariaextract decrease the bioaccessibility of cholesterol duringin vitrodigestion, by inducing cholesterol precipitation.
Room temperature gas sensing properties of tubular hydroxyapatite
Authors: Huixia Li , Yong Liu , Yanni Tan , Lanlan Luo , Qing Zhang , Kun Li , Hanchun Tang
Published: March 2015

Tubular hydroxyapatite was synthesized and showed high response, selectivity, good reproducibility and short response and recovery time to ammonia.
Palladium nanoparticles embedded on thiourea-modified chitosan: a green and sustainable heterogeneous catalyst for the Suzuki reaction in water
Authors: Affrose Abdullah , Suresh Palaniswamy , Azath Ismail Abulkalam , Pitchumani Kasi
Published: March 2015

Palladium nanoparticles embedded on thiourea modified chitosan (TMC) are prepared in spherical and cubical shapes by intercalating Pd(OAc)2 in TMC, a natural bio-polymer, and a subsequent reduction using ellagic acid as a natural and green reducing source in water.
Interplay between the composition of LLDPE/PS blends and their compatibilization with polyethylene-graft-polystyrene in the foaming behaviour
Authors: Zhang Guangchun , Wang Yuanliang , Xing Haiping , Qiu Jian , Gong Jiang , Yao Kun , Tan Haiying , Jiang Zhiwei , Tang Tao
Published: March 2015

The influences of PE-g-PS compatibilization on the foaming behaviour of LLDPE/PS blends in batch foaming using scCO2 as physical foaming agent depend strongly on the composition of the blends.
Chiral, fluorescent microparticles constructed by optically active helical substituted polyacetylene: preparation and enantioselective recognition ability
Authors: Huang Huajun , Yang Wantai , Deng Jianping
Published: March 2015

Novel chiral fluorescent microparticles derived from helical substituted polyacetylene were prepared. The microparticles showed enantioselective recognition ability in both heterogeneous and homogeneous systems.
Glutamine-assisted synthesis of Cu-doped CeO2 nanowires with an improved low-temperature CO oxidation activity
Authors: Wang Juan , Lin Siwen , Han Zeye , Liu Yuping
Published: March 2015

Glutamine (GLN)-assisted Cu-doped CeO2 nanowires exhibit an outstanding performance for CO oxidation and can completely convert CO at 90 °C.
Geometric capture and escape of a microswimmer colliding with an obstacle
Authors: Spagnolie Saverio E. , Moreno-Flores Gregorio R. , Bartolo Denis , Lauga Eric
Published: March 2015

A colloid larger than a critical size may act as a passive trap for microswimmers. We address the critical trapping radius, the basin of attraction, the scattering angle for sub-critical colloid sizes, and the effects of Brownian fluctuations.
Friction between ring polymer brushes
Authors: Erbaş Aykut , Paturej Jarosław
Published: March 2015

Friction between ring polymer brush bilayers sliding past each other is studied using extensive coarse-grained molecular dynamics simulations and scaling arguments, and the results are compared to the friction between bilayers of linear polymer brushes.
Band-structure-controlled BiO(ClBr)(1−x)/2Ix solid solutions for visible-light photocatalysis
Authors: Liu Guigao , Wang Tao , Ouyang Shuxin , Liu Lequan , Jiang Haiying , Yu Qing , Kako Tetsuya , Ye Jinhua
Published: March 2015

A new group of BiO(ClBr)(1−x)/2Ix solid solutions demonstrated notably high and composition-dependent photoactivities for gaseous organic compound degradation.
The role of oxygen plasma in the formation of oxygen defects in HfOx films deposited at room temperature
Authors: Januar Mochamad , Prakoso Suhendro Purbo , Lan Sen-Yao , Mahanty Rama Krushna , Kuo Shou-Yi , Liu Kou-Chen
Published: March 2015

Oxygen plasma treatment controls different stoichiometries on the surface of a-HfOx films, giving a recipe to fabricate MIM and TFT devices at room-temperature.
A hanging plasmonic droplet: three-dimensional SERS hotspots for a highly sensitive multiplex detection of amino acids
Authors: Wang Hongyan , Fang Jinmei , Xu Jifei , Wang Fan , Sun Bai , He Shengnan , Sun Guoping , Liu Honglin
Published: March 2015

3D hotspots in a hanging plasmonic droplet result in an ultrahigh Raman Scattering for the ultratrace and multiplex identification of amino acids.
Di-oxime based selective fluorescent probe for arsenate and arsenite ions in a purely aqueous medium with living cell imaging applications and H-bonding induced microstructure formation
Authors: Islam Abu Saleh Musha , Alam Rabiul , Katarkar Atul , Chaudhuri Keya , Ali Mahammad
Published: March 2015

A 2-hydroxy-5-methyl-benzene-1,3-dicarboxaldehyde di-oxime based turn-on blue emission fluorescent probe was found to recognize both AsO2− and H2AsO4− in a purely aqueous medium in intra and extra-cellular conditions.
An l-lysine derived organogelator-based stationary phase for mixed-mode liquid chromatography
Authors: Guragain Sudhina , Mallik Abul K. , Takafuji Makoto , Ihara Hirotaka
Published: March 2015

An l-lysine-based, urea containing organogelator-modified silica stationary phase, with ordered functional groups, was applied for the separation of chiral analytes and polar analytes.
Facile synthesis of RGD peptide-modified iron oxide nanoparticles with ultrahigh relaxivity for targeted MR imaging of tumors
Authors: Hu Yong , Li Jingchao , Yang Jia , Wei Ping , Luo Yu , Ding Ling , Sun Wenjie , Zhang Guixiang , Shi Xiangyang , Shen Mingwu
Published: March 2015

RGD peptide-functionalized iron oxide nanoparticles with ultrahigh relaxivity can be synthesized for targeted MR imaging of αvβ3integrin-overexpressing tumors.
Direct solvothermal phosphorization of nickel foam to fabricate integrated Ni2P-nanorods/Ni electrodes for efficient electrocatalytic hydrogen evolution
Authors: Wang Xiaoguang , Kolen'ko Yury V. , Liu Lifeng
Published: March 2015

An integrated Ni2P-nanorods/Ni electrode is fabricated by direct phosphorization of a Ni foam current collector under solvothermal conditions, showing high electrocatalytic performance toward hydrogen evolution.
Construction of giant branched nanotubes from cyclodextrin-based supramolecular amphiphiles
Authors: Fan Xiaotong , Wang Liang , Luo Quan , Zhao Linlu , Xu Jiayun , Liu Junqiu , Zheng Qingchuan
Published: March 2015

Branched nanotubes are constructed using cyclodextrin-based amphiphiles.
Supramolecular imidazolium frameworks: direct analogues of metal azolate frameworks with charge-inverted node-and-linker structure
Authors: Mottillo Cristina , Friščić Tomislav
Published: March 2015

Assembly of imidazolium cations with tetrahedral divalent anions leads to supramolecular imidazolium frameworks, molecular analogues of metal azolate frameworks, illustrating a charge-inverted framework design involving cationic linkers and anionic nodes.
Guest-containing supramolecular isomers of silver(i) 3,5-dialkyl-1,2,4-triazolates: syntheses, structures, and structural transformation behaviours
Authors: Yang Xiao , Wang Yu , Zhou Hao-Long , Liu Yi-Jiang , He Chun-Ting , Lin Rui-Biao , Zhang Jie-Peng
Published: March 2015

Using benzene as a template, a series of guest-containing silver(i) 3,5-dialkyl-1,2,4-triazolate isomers showing different structural transformation behaviours have been synthesized.
EBSD-measurements of textured apatite glass-ceramics
Authors: Wisniewski Wolfgang , de Kloe René , Rüssel Christian
Published: March 2015

A partially crystallized glass melt is extruded to align the apatite crystals. An orientation dependent EBSD-pattern acquisition is observed, making texture analysis problematic.
Copper pyromellitates: a complex story
Authors: Clegg William , Holcroft James M. , Martin Nicola C.
Published: March 2015

Copper pyromellitate complexes range from unusual discrete molecular ions to 2- and 3-dimensional polymeric networks with considerable ligand structural versatility.
A comprehensive study on micellization of dissymmetric pyrrolidinium headgroup-based gemini surfactants
Authors: Zou Min , Dong Jinfeng , Yang Guangfu , Li Xuefeng
Published: March 2015

Dissymmetric gemini surfactants show a higher surface activity and better aggregation ability than symmetric ones.
Theoretical research on the effect of regulated π-conjugation on the photophysical properties of Ir(iii) complexes
Authors: Xie Li-Ming , Bai Fu-Quan , Li Wei , Zhang Zhi-Xiang , Zhang Hong-Xing
Published: March 2015

Larger π-skeleton-conjugation in host ligands of Ir(iii) carbene complexes can result in remarkably blue-shifted emission and can effectively improve the quantum efficiency.
Tetranuclear ruthenium(ii) complexes with oligo-oxyethylene linkers as one- and two-photon luminescent tracking non-viral gene vectors
Authors: Qiu Kangqiang , Yu Bole , Huang Huaiyi , Zhang Pingyu , Ji Liangnian , Chao Hui
Published: March 2015

Four tetranuclear ruthenium(ii) complexes Ru1–Ru4 based on oligo-oxyethylene and polybenzimidazole have been developed as one- and two-photon luminescent tracking non-viral gene vectors.
Organo-palladium(ii) complexes bearing unsymmetrical N,N,N-pincer ligands: synthesis, structures and oxidatively induced coupling reactions
Authors: Wright Luka A. , Hope Eric G. , Solan Gregory A. , Cross Warren B. , Singh Kuldip
Published: March 2015

Oxidation of the palladium-phenylN,N,Nmipp-pincer with Selectfluor leads to C–C coupling to give biphenyl; neither C–C nor C–F coupling is observed using the more sterically bulkyN,N,Ndipp-pincer analogue.
Solid state and solution studies of lithium tris(n-butyl)magnesiates stabilised by Lewis donors
Authors: Zaragoza-Calero Silvia , Francos Javier , Kennedy Alan R. , O'Hara Charles T.
Published: March 2015

Donor complexes of the synthetically important lithium magnesiate LiMg(nBu)3 have been prepared and characterised.
Imidazol-2-ylidene-N′-phenylureate ligands in alkali and alkaline earth metal coordination spheres – heterocubane core to polymeric structural motif formation
Authors: Naktode Kishor , Bhattacharjee Jayeeta , Nayek Hari Pada , Panda Tarun K.
Published: March 2015

Synthetic and structural details of imidazol-2-ylidene-N′-phenylureate ligand supported two potassium complexes with a hetero-cubane K4O4 core and a polymeric structure, along with a mixed metal Ca–K complex are presented.
Exploring a novel preparation method of 1D metal organic frameworks based on supercritical CO2
Authors: López-Periago A. , Vallcorba O. , Frontera C. , Domingo C. , Ayllón J. A.
Published: March 2015

The preparation of copper(ii) one-dimensional MOFs using scCO2 as solvent is reported.
Dehydration of sorbitol to isosorbide over H-beta zeolites with high Si/Al ratios
Authors: Kobayashi Hirokazu , Yokoyama Haruka , Feng Bo , Fukuoka Atsushi
Published: March 2015

H-beta zeolite with a Si/Al ratio of 75 uniquely shows high catalytic activity for the dehydration of sorbitol, giving a 76% yield of isosorbide at 400 K over 2 h.
Upgrading biogenic furans: blended C10–C12 platform chemicals via lyase-catalyzed carboligations and formation of novel C12 – choline chloride-based deep-eutectic-solvents
Authors: Donnelly Joseph , Müller Christoph R. , Wiermans Lotte , Chuck Christopher J. , Domínguez de María Pablo
Published: March 2015

Benzaldehyde lyase (BAL) results in an efficient biocatalyst for the umpolung carboligation of furfural, HMF, and mixtures therein.
Site-specific nanopatterning of functional metallic and molecular arbitrary features in nanofluidic channels
Authors: Xu Yan , Matsumoto Nobuhiro , Wu Qian , Shimatani Yuji , Kawata Hiroaki
Published: March 2015

We present a versatile methodology for site-specific nanopatterning of functional metallic and molecular arbitrary features in glass nanofluidic channels.
Simultaneous effects of surface spins: rarely large coercivity, high remanence magnetization and jumps in the hysteresis loops observed in CoFe2O4nanoparticles
Authors: Xu S. T. , Ma Y. Q. , Zheng G. H. , Dai Z. X.
Published: March 2015

Well-dispersed uniform CoFe2O4nanoparticles were synthesized. Some of the nanoparticles were diluted in a SiO2matrix and then the magnetic behavior of undiluted and diluted samples were explored. Several novel physical phenomena were observed simultaneously.
Healable shape memory (thio)urethane thermosets
Authors: Nguyen Le-Thu T. , Truong Thuy Thu , Nguyen Ha Tran , Le Lam , Nguyen Viet Quoc , Van Le Thang , Luu Anh Tuan
Published: March 2015

(Thio)urethane networks combining SM properties and self-healability under mild temperature conditions via the DA chemistry were developed. The effect of various network architectures in SM-aided scratch healing was evaluated.
Electrospun polymer nanofiber membrane electrodes and an electrolyte for highly flexible and foldable all-solid-state supercapacitors
Authors: Miao Yue-E , Yan Jiajie , Huang Yunpeng , Fan Wei , Liu Tianxi
Published: March 2015

A highly flexible all-solid-state supercapacitor consisting of electrospun polymer nanocomposite membrane electrodes and a polymer nanofiber membrane-reinforced gel separator has been fabricated.
Aggregation deaggregation influenced selective and sensitive detection of Cu2+and ATP by histidine functionalized water-soluble fluorescent perylene diimide under physiological conditions and in living cells
Authors: Muthuraj Balakrishnan , Chowdhury Sayan Roy , Mukherjee Sudip , Patra Chitta Ranjan , Iyer Parameswar Krishnan
Published: March 2015

A novel PDI-HIS probe detects Cu2+to form aggregated nonfluorescent complex. Addition of 0.58 ppm ATP to this complex causes its rapid disaggregation thereby recovering the fluorescence by ∼99%in vitroand in A549 living cells.
Reduced graphene oxide paper based nanocomposite materials for flexible supercapacitors
Authors: Rath Tanmoy , Kundu Patit Paban
Published: March 2015

A flexible supercapacitor is developed by combining reduced graphene oxide (rGO), cellulose and RTIL. The device exhibited good electrochemical performance with an energy density of 6.28 W h kg−1 at a power density of 1.32 kW kg−1 in a 6 M KOH electrolyte.
A green one-pot three-component synthesis of tetrahydrobenzo[b]pyran and 3,4-dihydropyrano[c]chromene derivatives using a Fe3O4@SiO2–imid–PMAn magnetic nanocatalyst under ultrasonic irradiation or reflux conditions
Authors: Esmaeilpour Mohsen , Javidi Jaber , Dehghani Farzaneh , Nowroozi Dodeji Fatemeh
Published: March 2015

Green synthesis of tetrahydrobenzo[b]pyran and dihydropyrano[3,2-c]chromene derivatives.
De novo synthesis of functionalized 1,3-enynes and extended conjugated molecular systems
Authors: Rao Maddali L. N. , Dasgupta Priyabrata , Murty Venneti N.
Published: March 2015

Pd-catalyzed coupling of 1,3-dienyldibromides with triarylbismuths was demonstrated for the synthesis of a diverse range of 1,3-enynes.
Cathodic and anodic photocurrents generation from melem and its derivatives
Authors: Wei Xiaoqing , Qiu Yu , Duan Weiyuan , Liu Zhengxin
Published: March 2015

Bidirectional photocurrents start to appear after the tri-s-triazine ring structure is formed.
Very efficient and broad-in-scope palladium-catalyzed Hiyama cross-coupling. The role of water and copper(i) salts
Authors: Traficante Carla I. , Mata Ernesto G. , Delpiccolo Carina M. L.
Published: March 2015

A very high-yielding Pd-catalyzed cross-coupling between aryl halides and aryl(trialkoxy)silanes is achieved in the presence of Cu(i) and a measured amount of water.
Synergistic effect of a r-GO/PANI nanocomposite electrode based air working ionic actuator with a large actuation stroke and long-term durability
Authors: Liu Qing , Liu Luqi , Xie Ke , Meng Yuena , Wu Haiping , Wang Guorui , Dai Zhaohe , Wei Zhixiang , Zhang Zhong
Published: March 2015

Ar-GO/PANI nanocomposite based air working ionic actuator demonstrates a large actuation stroke and long-term durability.
Antibacterial 45S5 Bioglass®-based scaffolds reinforced with genipin cross-linked gelatin for bone tissue engineering
Authors: Li Wei , Wang Hui , Ding Yaping , Scheithauer Ellen C. , Goudouri Ourania-Menti , Grünewald Alina , Detsch Rainer , Agarwal Seema , Boccaccini Aldo R.
Published: March 2015

45S5 Bioglass® (BG) scaffolds with high porosity (>90%) were coated with genipin cross-linked gelatin (GCG) and further incorporated with poly(p-xylyleneguanidine) hydrochloride (PPXG).
Correction: Multivalency: influence of the residence time and the retraction rate on rupture forces measured by AFM
Authors: Bacharouche Jalal , Degardin Mélissa , Jierry Loïc , Carteret Cédric , Lavalle Philippe , Hemmerlé Joseph , Senger Bernard , Auzély-Velty Rachel , Boulmedais Fouzia , Boturyn Didier , Coche-Guérente Liliane , Schaaf Pierre , Francius Grégory
Published: March 2015

Correction for ‘Multivalency: influence of the residence time and the retraction rate on rupture forces measured by AFM’ by Jalal Bacharouche et al., J. Mater. Chem. B, 2015, 3, 1801–1812.
Space vector pulse‐width modulation technique for an eleven‐phase voltage source inverter with sinusoidal output voltage generation
Authors: Moinoddin Shaikh , Abu‐Rub Haitham , Iqbal Atif , Moin Ahmed Sk , Dordevic Obrad , Levi Emil
Published: March 2015

This study discusses the space vector pulse‐width modulation (SVPWM) scheme for an eleven‐phase two‐level voltage source inverter, aimed at producing a sinusoidal output voltage waveform. Generalised space vector theory is used to realise the SVPWM. As per the general inverter switching theory, there are 211 = 2048 switching states that yield 2046 active voltage space vectors and one zero voltage vector, which results with two switching states. Out of the total of 2046 active voltage vectors, the most suitable set comprising 110 active voltage vectors is identified and is utilised in the implementation of the SVPWM. The sinusoidal voltage is obtained by controlling the duty cycles of the applied voltage space vectors in such a way that the non‐zero reference voltage in the first (d–q) plane is achieved, while simultaneously zeroing the average voltage in the other four (x–y) planes in accordance with the zero references. The theoretical results are verified by experimentation using a passive resistive‐inductive load. Finally, experimentally obtained total harmonic distortion values of the phase voltage and current for the eleven‐phase SVPWM are compared with the corresponding values obtained using SVPWM for other odd phase numbers.
Analysis of induced electric field in human body by utility power frequency magnetic field using parallel fast multipole‐accelerated boundary element method
Authors: Takahashi Yasuhito , Ahagon Akira , Fujiwara Koji , Iwashita Takeshi , Nakashima Hiroshi
Published: March 2015

This study investigates the efficiency of a boundary element method (BEM) enhanced by a parallelised fast multipole method (FMM) in analyses of electric field induced in the human body because of low‐frequency magnetic field. The formulations of the BEM and FEM specialised for induced field analysis are presented. The scalability of the indirect BEM with the FMM in a distributed computing environment with over 100 processes is examined with pure message passing interface programming model. Numerical results of an anatomically‐based human body model obtained from the BEM and FEM are discussed from the standpoints of accuracy and computational cost.
Improving pulse eddy current and ultrasonic testing stress measurement accuracy using neural network data fusion
Authors: Habibalahi Abbas , Dashtbani Moghari Mahdieh , Samadian Kaveh , Mousavi Seyed Sajad , Safizadeh Mir Saeed
Published: March 2015

Stress and residual stress are two crucial factors which play important roles in mechanical performance of materials, including fatigue and creep, hence measuring them is highly in demand. Pulse eddy current (PEC) and ultrasonic testing (UT) are two non‐destructive tests (NDT) which are nominated to measure stresses and residual stresses by numerous scholars. However, both techniques suffer from lack of accuracy and reliability. One technique to tackle these challenges is data fusion, which has numerous approaches. This study introduces a promising one called neural network data fusion, which shows effective performance. First, stresses are simulated in an aluminium alloy 2024 specimen and then PEC and UT signals related to stresses are acquired and processed. Afterward, useful information obtained is fused using artificial neural network procedure and stresses are estimated by fused data. Finally, the accuracy of fused data are compared with PEC and UT information and results show the capability of neural network data fusion to improve stress measurement accuracy.
Synthesis of a Cyclic Analogue of Tuv N-Methyl Tubulysin
Authors: Ryu Jae-Sang , Park Yunjeong , Lee Jae
Published: March 2015

Tubulysins are the most potent antimitotic agents known so far. We are interested in the conformational effect of tubulysin and herein we report the design and synthesis of a conformationally rigid cyclic analogue of Tuv N-methyl tubulysin. A conformationally rigid tetrahydropyran moiety was incorporated into the Tuv fragment via enantioselective hetero Diels–Alder reaction to prevent the rotation of the Tuv chain. The following diastereoselective reductive amination yielded the (4-methylamino)tetrahydropyranyl Tuv fragment, which was coupled to d-Mep-l-Ile dipeptide fragment and Tup fragment sequentially.
Enantioselective Michael Addition Catalyzed by an Optically Active 1-Chlorovinyl Cobalt(III) Complex
Authors: Yamada Tohru , Tsubo Tatsuyuki
Published: March 2015

The optically active 1-chlorovinyl cobalt(III) complex was prepared from the ketoiminatocobalt(II) complex upon treatment with sodium borohydride in the presence of 1,1,1-trichloroethane. The obtained complex was found to catalyze the enantioselective Michael addition of various malonates on cyclic or acyclic enones to afford the corresponding adduct. In this reaction, the use of sodium alkoxide as a base with 1-chlorovinyl cobalt(III) complex catalyst was crucial to improving both the reactivity and enantioselectivity.
Acceleration of highly charged GeV Fe ions from a low-Z substrate by intense femtosecond laser
Authors: Nishiuchi M. , Sakaki H. , Esirkepov T. Zh. , Nishio K. , Pikuz T. A. , Faenov A. Ya. , Skobelev I. Yu. , Orlandi R. , Sako H. , Pirozhkov A. S. , Matsukawa K. , Sagisaka A. , Ogura K. , Kanasaki M. , Kiriyama H. , Fukuda Y. , Koura H. , Kando M. , Yamauchi T. , Watanabe Y. , Bulanov S. V. , Kondo K. , Imai K. , Nagamiya S.
Published: March 2015

Almost fully stripped Fe ions accelerated up to 0.9 GeV are demonstrated with a 200 TW femtosecond high-intensity laser irradiating a micron-thick Al foil with Fe impurity on the surface. An energetic low-emittance high-density beam of heavy ions with a large charge-to-mass ratio can be obtained, which is useful for many applications, such as a compact radio isotope source in combination with conventional technology.
Hard disk drive based microsecond x-ray chopper for characterization of ionization chambers and photodiodes
Authors: Müller O. , Lützenkirchen-Hecht D. , Frahm R.
Published: March 2015

A fast X-ray chopper capable of producing ms long X-ray pulses with a typical rise time of few μs was realized. It is ideally suited to investigate the temporal response of X-ray detectors with response times of the order of μs to ms, in particular, any kind of ionization chambers and large area photo diodes. The drive mechanism consists of a brushless DC motor and driver electronics from a common hard disk drive, keeping the cost at an absolute minimum. Due to its simple construction and small dimensions, this chopper operates at home lab based X-ray tubes and synchrotron radiation sources as well. The dynamics of the most important detectors used in time resolved X-ray absorption spectroscopy, namely, ionization chambers and Passivated Implanted Planar Silicon photodiodes, were investigated in detail. The results emphasize the applicability of this X-ray chopper.
A configurational study of helium clusters doped with He∗− and He2∗−
Authors: Rodríguez-Cantano Rocío , González-Lezana Tomás , Villarreal Pablo , Gianturco Franco A.
Published: March 2015

Helium clusters doped with electronically excited atomic and molecular helium anions He∗− and He2∗− at T = 0.4 K are studied by means of path integral Monte Carlo calculations. Geometry and energetics of the systems with up to 32 solvating He atoms are characterised. The interactions between the anions and the neutral He atoms have been described by fitting previously reported ab initio points to analytical expressions. The HeN–He∗− clusters with N > 6 display a structure defined by a bipyramid which completely solvates the atomic anion, whereas the rest of surrounding He atoms form a dimple around that initial cage. On the contrary, the structures observed for the HeN–He2∗− clusters clearly show the dopant located outside the helium droplet, thereby confirming the heliophobic character of He2∗−.
Thermodynamics of the adsorption of flexible polymers on nanowires
Authors: Vogel Thomas , Gross Jonathan , Bachmann Michael
Published: March 2015

Generalized-ensemble simulations enable the study of complex adsorption scenarios of a coarse-grained model polymer near an attractive nanostring, representing an ultrathin nanowire. We perform canonical and microcanonical statistical analyses to investigate structural transitions of the polymer and discuss their dependence on the temperature and on model parameters such as effective wire thickness and attraction strength. The result is a complete hyperphase diagram of the polymer phases, whose locations and stability are influenced by the effective material properties of the nanowire and the strength of the thermal fluctuations. Major structural polymer phases in the adsorbed state include compact droplets attached to or wrapping around the wire, and tubelike conformations with triangular pattern that resemble ideal boron nanotubes. The classification of the transitions is performed by microcanonical inflection-point analysis.
Highly coherent red-shifted dispersive wave generation around 1.3 μm for efficient wavelength conversion
Authors: Li Xia , Chen Wei , Xue Tianfeng , Bi Wanjun , Gao Weiqing , Hu Lili , Liao Meisong
Published: March 2015

This research investigates the mechanism of the optical dispersive wave (DW) and proposes a scheme that can realize an efficient wavelength conversion. In an elaborately designed photonic crystal fiber, a readily available ytterbium laser operating at ∼1 μm can be transferred to the valuable 1.3 μm wavelength range. A low-order soliton is produced to concentrate the energy of the DW into the target wavelength range and improve the degree of coherence. The input chirp is demonstrated to be a factor that enhances the wavelength conversion efficiency. With a positive initial chirp, 76.6% of the pump energy in the fiber can be transferred into a spectral range between 1.24 and 1.4 μm. With the use of a grating compressor, it is possible to compress the generated coherent DW of several picoseconds into less than 90 fs.
Electron trap level of hydrogen incorporated nitrogen vacancies in silicon nitride
Authors: Sonoda Ken'ichiro , Tsukuda Eiji , Tanizawa Motoaki , Yamaguchi Yasuo
Published: March 2015

Hydrogen incorporation into nitrogen vacancies in silicon nitride and its effects on electron trap level are analyzed using simulation based on density functional theory with temperature- and pressure-dependent hydrogen chemical potential. If the silicon dangling bonds around a nitrogen vacancy are well separated each other, hydrogen incorporation is energetically stable up to 900 °C, which is in agreement with the experimentally observed desorption temperature. On the other hand, if the dangling bonds strongly interact, the incorporation is energetically unfavorable even at room temperature because of steric hindrance. An electron trap level caused by a nitrogen vacancy becomes shallow by the hydrogen incorporation. An electron is trapped in a deep level created by a silicon dangling bond before hydrogen incorporation, whereas it is trapped in a shallow level created by an anti-bonding state of a silicon-silicon bond after hydrogen incorporation. The simulation results qualitatively explain the experiment, in which reduced hydrogen content in silicon nitride shows superior charge retention characteristics.
Magnetoresistive system with concentric ferromagnetic asymmetric nanorings
Authors: Avila J. I. , Tumelero M. A. , Pasa A. A. , Viegas A. D. C.
Published: March 2015

A structure consisting of two concentric asymmetric nanorings, each displaying vortex remanent states, is studied with micromagnetic calculations. By orienting in suitable directions, both the asymmetry of the rings and a uniform magnetic field, the vortices chiralities can be switched from parallel to antiparallel, obtaining in this way the analogue of the ferromagnetic and antiferromagnetic configurations found in bar magnets pairs. Conditions on the thickness of single rings to obtain vortex states, as well as formulas for their remanent magnetization are given. The concentric ring structure enables the creation of magnetoresistive systems comprising the qualities of magnetic nanorings, such as low stray fields and high stability. A possible application is as contacts in spin injection in semiconductors, and estimations obtained here of magnetoresistance change for a cylindrical spin injection based device show significant variations comparable to linear geometries.
A study of polaritonic transparency in couplers made from excitonic materials
Authors: Singh Mahi R. , Racknor Chris
Published: March 2015

We have studied light matter interaction in quantum dot and exciton-polaritonic coupler hybrid systems. The coupler is made by embedding two slabs of an excitonic material (CdS) into a host excitonic material (ZnO). An ensemble of non-interacting quantum dots is doped in the coupler. The bound exciton polariton states are calculated in the coupler using the transfer matrix method in the presence of the coupling between the external light (photons) and excitons. These bound exciton-polaritons interact with the excitons present in the quantum dots and the coupler is acting as a reservoir. The Schrödinger equation method has been used to calculate the absorption coefficient in quantum dots. It is found that when the distance between two slabs (CdS) is greater than decay length of evanescent waves the absorption spectrum has two peaks and one minimum. The minimum corresponds to a transparent state in the system. However, when the distance between the slabs is smaller than the decay length of evanescent waves, the absorption spectra has three peaks and two transparent states. In other words, one transparent state can be switched to two transparent states when the distance between the two layers is modified. This could be achieved by applying stress and strain fields. It is also found that transparent states can be switched on and off by applying an external control laser field.
Drifts of electron orbits induced by toroidal electric field in tokamaks
Authors: Abdullaev S. S.
Published: March 2015

The drifts of electron orbits induced by the toroidal electric field in tokamaks are analyzed. Based on the relativistic Hamiltonian equations for guiding centre motion, the formula for the drift velocity vdr is derived. It describes the outward drift of passing particles as well as the inward drift (the Ware pinch) of trapped particles. Unlike the approximate formula for vdr given in Guan et al. [Phys. Plasmas 17, 092502 (2010)] for circular electron orbits, it describes qualitatively new features of the outward drift of electron orbits. Particularly, the new formula describes the evolution of the orbit's shape, the formation of X-point and the associated separatrix. It is shown that the outward drift velocity is proportional to the inverse aspect ratio of tokamaks.