bluuebunny/crossref_metadata_2025 huggingface dataset:
General Strategy for Broadband Coherent Perfect Absorption and Multi-wavelength All-optical Switching Based on Epsilon-Near-Zero Multilayer Films
Authors: Kim Tae Young , Badsha Md. Alamgir , Yoon Junho , Lee Seon Young , Jun Young Chul , Hwangbo Chang Kwon
Published: March 2016

We propose a general, easy-to-implement scheme for broadband coherent perfect absorption (CPA) using epsilon-near-zero (ENZ) multilayer films. Specifically, we employ indium tin oxide (ITO) as a tunable ENZ material, and theoretically investigate CPA in the near-infrared region. We first derive general CPA conditions using the scattering matrix and the admittance matching methods. Then, by combining these two methods, we extract analytic expressions for all relevant parameters for CPA. Based on this theoretical framework, we proceed to study ENZ CPA in a single layer ITO film and apply it to all-optical switching. Finally, using an ITO multilayer of different ENZ wavelengths, we implement broadband ENZ CPA structures and investigate multi-wavelength all-optical switching in the technologically important telecommunication window. In our design, the admittance matching diagram was employed to graphically extract not only the structural parameters (the film thicknesses and incident angles), but also the input beam parameters (the irradiance ratio and phase difference between two input beams). We find that the multi-wavelength all-optical switching in our broadband ENZ CPA system can be fully controlled by the phase difference between two input beams. The simple but general design principles and analyses in this work can be widely used in various thin-film devices.
Characterization and comparison of post-natal rat Achilles tendon-derived stem cells at different development stages
Authors: Chen Jialin , Zhang Wei , Liu Zeyu , Zhu Ting , Shen Weiliang , Ran Jisheng , Tang Qiaomei , Gong Xiaonan , Backman Ludvig J. , Chen Xiao , Chen Xiaowen , Wen Feiqiu , Ouyang Hongwei
Published: March 2016

Tendon stem/progenitor cells (TSPCs) are a potential cell source for tendon tissue engineering. The striking morphological and structural changes of tendon tissue during development indicate the complexity of TSPCs at different stages. This study aims to characterize and compare post-natal rat Achilles tendon tissue and TSPCs at different stages of development. The tendon tissue showed distinct differences during development: the tissue structure became denser and more regular, the nuclei became spindle-shaped and the cell number decreased with time. TSPCs derived from 7 day Achilles tendon tissue showed the highest self-renewal ability, cell proliferation, and differentiation potential towards mesenchymal lineage, compared to TSPCs derived from 1 day and 56 day tissue. Microarray data showed up-regulation of several groups of genes in TSPCs derived from 7 day Achilles tendon tissue, which may account for the unique cell characteristics during this specific stage of development. Our results indicate that TSPCs derived from 7 day Achilles tendon tissue is a superior cell source as compared to TSPCs derived from 1 day and 56 day tissue, demonstrating the importance of choosing a suitable stem cell source for effective tendon tissue engineering and regeneration.
Ecosystem function decays by fungal outbreaks in Antarctic microbial mats
Authors: Velázquez David , López-Bueno Alberto , Aguirre de Cárcer Daniel , de los Ríos Asunción , Alcamí Antonio , Quesada Antonio
Published: March 2016

Antarctica harbours a remarkably diverse range of freshwater bodies and terrestrial ecosystems, where microbial mats are considered the most important systems in terms of biomass and metabolic capabilities. We describe the presence of lysis plaque-like macroscopic blighted patches within the predominant microbial mats on Livingston Island (Antarctic Peninsula). Those blighting circles are associated with decay in physiological traits as well as nitrogen depletion and changes in the spatial microstructure; these alterations were likely related to disruption of the biogeochemical gradients within the microbial ecosystem caused by an unusually high fungal abundance and consequent physical alterations. This phenomenon has been evidenced at a time of unprecedented rates of local warming in the Antarctic Peninsula area and decay of these ecosystems is potentially stimulated by warmer temperatures.
Inter-comparison of Seasonal Variation, Chemical Characteristics, and Source Identification of Atmospheric Fine Particles on Both Sides of the Taiwan Strait
Authors: Li Tsung-Chang , Yuan Chung-Shin , Huang Hu-Ching , Lee Chon-Lin , Wu Shui-Ping , Tong Chuan
Published: March 2016

The spatiotemporal distribution and chemical composition of atmospheric fine particles in areas around the Taiwan Strait were firstly investigated. Fine particles (PM2.5) were simultaneously collected at two sites on the west-side, one site at an offshore island, and three sites on the east-side of the Taiwan Strait in 2013–2014. Field sampling results indicated that the average PM2.5 concentrations at the west-side sampling sites were generally higher than those at the east-side sampling sites. In terms of chemical composition, the most abundant water-soluble ionic species of PM2.5 were SO42−, NO3−, and NH4+, while natural crustal elements dominated the metallic content of PM2.5, and the most abundant anthropogenic metals of PM2.5 were Pb, Ni and Zn. Moreover, high OC/EC ratios of PM2.5 were commonly observed at the west-side sampling sites, which are located at the downwind of major stationary sources. Results from CMB receptor modeling showed that the major sources of PM2.5 were anthropogenic sources and secondary aerosols at the both sides, and natural sources dominated PM2.5 at the offshore site. A consistent decrease of secondary sulfate and nitrate contribution to PM2.5 suggested the transportation of aged particles from the west-side to the east-side of the Taiwan Strait.
Uncertainty-based Optimization Algorithms in Designing Fractionated Spacecraft
Authors: Ning Xin , Yuan Jianping , Yue Xiaokui
Published: March 2016

A fractionated spacecraft is an innovative application of a distributive space system. To fully understand the impact of various uncertainties on its development, launch and in-orbit operation, we use the stochastic missioncycle cost to comprehensively evaluate the survivability, flexibility, reliability and economy of the ways of dividing the various modules of the different configurations of fractionated spacecraft. We systematically describe its concept and then analyze its evaluation and optimal design method that exists during recent years and propose the stochastic missioncycle cost for comprehensive evaluation. We also establish the models of the costs such as module development, launch and deployment and the impacts of their uncertainties respectively. Finally, we carry out the Monte Carlo simulation of the complete missioncycle costs of various configurations of the fractionated spacecraft under various uncertainties and give and compare the probability density distribution and statistical characteristics of its stochastic missioncycle cost, using the two strategies of timing module replacement and non-timing module replacement. The simulation results verify the effectiveness of the comprehensive evaluation method and show that our evaluation method can comprehensively evaluate the adaptability of the fractionated spacecraft under different technical and mission conditions.
Candida albicans repetitive elements display epigenetic diversity and plasticity
Authors: Freire-Benéitez Verónica , Price R. Jordan , Tarrant Daniel , Berman Judith , Buscaino Alessia
Published: March 2016

Transcriptionally silent heterochromatin is associated with repetitive DNA. It is poorly understood whether and how heterochromatin differs between different organisms and whether its structure can be remodelled in response to environmental signals. Here, we address this question by analysing the chromatin state associated with DNA repeats in the human fungal pathogen Candida albicans. Our analyses indicate that, contrary to model systems, each type of repetitive element is assembled into a distinct chromatin state. Classical Sir2-dependent hypoacetylated and hypomethylated chromatin is associated with the rDNA locus while telomeric regions are assembled into a weak heterochromatin that is only mildly hypoacetylated and hypomethylated. Major Repeat Sequences, a class of tandem repeats, are assembled into an intermediate chromatin state bearing features of both euchromatin and heterochromatin. Marker gene silencing assays and genome-wide RNA sequencing reveals that C. albicans heterochromatin represses expression of repeat-associated coding and non-coding RNAs. We find that telomeric heterochromatin is dynamic and remodelled upon an environmental change. Weak heterochromatin is associated with telomeres at 30 °C, while robust heterochromatin is assembled over these regions at 39 °C, a temperature mimicking moderate fever in the host. Thus in C. albicans, differential chromatin states controls gene expression and epigenetic plasticity is linked to adaptation.
Elevated on-treatment levels of serum IFN-gamma is associated with treatment failure of peginterferon plus ribavirin therapy for chronic hepatitis C
Authors: Lu Ming-Ying , Huang Ching-I , Dai Chia-Yen , Wang Shu-Chi , Hsieh Ming-Yen , Hsieh Meng-Hsuan , Liang Po-Cheng , Lin Yi-Hung , Hou Nai-Jen , Yeh Ming-Lun , Huang Chung-Feng , Lin Zu-Yau , Chen Shinn-Cherng , Huang Jee-Fu , Chuang Wan-Long , Yu Ming-Lung
Published: March 2016

Chronic hepatitis C virus (HCV) infection had been associated with cytokine imbalance. Cytokine dynamics in response to peginterferon/ribavirin therapy have an impact on the treatment efficacy for HCV patients. Ninety-two treatment-naive chronic hepatitis C patients were treated with 24 or 48 weeks of peginterferon/ribavirin therapy according to their viral genotypes. Sustained virologic response (SVR) is defined as undetectable HCV RNA throughout a 24-week post-treatment follow-up period. Dynamic serum levels of the following cytokines: (1) Th1-mediated cytokines: IFN-γ, interleukin-2, and TNF-alpha; (2)Th2-mediated cytokines: interleukin-4, interleukin-5, interleukin-6, and interleukin-10 and (3)immuno-modulatory cytokines: interleukin-1β, interleukin-8, and interleukin-12 were determined by Fluorescent Bead immunoassay. Serial dynamic cytokine expression demonstrated that not only elevated IFN-γ concentrations at specific time points but also the total IFN-γ amount was strongly linked to non-response in peginterferon/ribavirin therapy. IFN-γ levels could serve as an independent predictor for SVR analyzed by multivariate logistic regression test. The accuracy of discriminating responders from non-responders was acceptable when IFN-γ cut-off levels were set at 180, 120, and 40 pg/ml at the 4th week, 12th week, and end-of-treatment of therapy, respectively. Elevated on-treatment IFN-γ concentration was significantly associated with treatment failure among interleukin-28B rs8099917TT carriers and those patients failed to achieve rapid virologic response.
Novel function of LHFPL2 in female and male distal reproductive tract development
Authors: Zhao Fei , Zhou Jun , Li Rong , Dudley Elizabeth A. , Ye Xiaoqin
Published: March 2016

Congenital reproductive tract anomalies could impair fertility. Female and male reproductive tracts are developed from Müllerian ducts and Wolffian ducts, respectively, involving initiation, elongation and differentiation. Genetic basis solely for distal reproductive tract development is largely unknown. Lhfpl2 (lipoma HMGIC fusion partner-like 2) encodes a tetra-transmembrane protein with unknown functions. It is expressed in follicle cells of ovary and epithelial cells of reproductive tracts. A spontaneous point mutation of Lhfpl2 (LHFPL2G102E) leads to infertility in 100% female mice, which have normal ovarian development, ovulation, uterine development, and uterine response to exogenous estrogen stimulation, but abnormal upper longitudinal vaginal septum and lower vaginal agenesis. Infertility is also observed in ~70% mutant males, which have normal mating behavior and sperm counts, but abnormal distal vas deferens convolution resulting in complete and incomplete blockage of reproductive tract in infertile and fertile males, respectively. On embryonic day 15.5, mutant Müllerian ducts and Wolffian ducts have elongated but their duct tips are enlarged and fail to merge with the urogenital sinus. These findings provide a novel function of LHFPL2 and a novel genetic basis for distal reproductive tract development; they also emphasize the importance of an additional merging phase for proper reproductive tract development.
High Efficiency CVD Graphene-lead (Pb) Cooper Pair Splitter
Authors: Borzenets I. V. , Shimazaki Y. , Jones G. F. , Craciun M. F. , Russo S. , Yamamoto M. , Tarucha S.
Published: March 2016

Generation and manipulation of quantum entangled electrons is an important concept in quantum mechanics and necessary for advances in quantum information processing; but not yet established in solid state systems. A promising device is a superconductor-two quantum dots Cooper pair splitter. Early nanowire based devices, while efficient, are limited in scalability and further electron manipulation. We demonstrate an optimized, high efficiency, CVD grown graphene-based Cooper pair splitter. Our device is designed to induce superconductivity in graphene via the proximity effect, resulting in both a large superconducting gap Δ = 0.5 meV and coherence length ξ = 200 nm. The flat nature of the device lowers parasitic capacitance, increasing charging energy EC. Our design also eases geometric restrictions and minimizes output channel separation. As a result we measure a visibility of up to 86% and a splitting efficiency of up to 62%. This will pave the way towards near unity efficiencies, long distance splitting and post-splitting electron manipulation.
Unique glycosignature for intervertebral disc and articular cartilage cells and tissues in immaturity and maturity
Authors: Collin E. C. , Kilcoyne M. , White S. J. , Grad S. , Alini M. , Joshi L. , Pandit A. S.
Published: March 2016

In this study, on/off markers for intervertebral disc (IVD) and articular cartilage (AC) cells (chondrocytes) and distinct glycoprofiles of cell and tissue-types were identified from immaturity to maturity. Three and eleven month-old ovine IVD and AC tissues were histochemically profiled with a panel of lectins and antibodies. Relationships between tissue and cell types were analysed by hierarchical clustering. Chondroitin sulfate (CS) composition of annulus fibrosus (AF), nucleus pulposus (NP) and AC tissues was determined by HPLC analysis. Clear on/off cell type markers were identified, which enabled the discrimination of chondrocytes, AF and NP cells. AF and NP cells were distinguishable using MAA, SNA-I, SBA and WFA lectins, which bound to both NP cells and chondrocytes but not AF cells. Chondrocytes were distinguished from NP and AF cells with a specific binding of LTA and PNA lectins to chondrocytes. Each tissue showed a unique CS composition with a distinct switch in sulfation pattern in AF and NP tissues upon disc maturity while cartilage maintained the same sulfation pattern over time. In conclusion, distinct glycoprofiles for cell and tissue-types across age groups were identified in addition to altered CS composition and sulfation patterns for tissue types upon maturity.
Near-IR luminescent lanthanide complexes with 1,8-diaminoanthraquinone-based chromophoric ligands
Authors: Stacey Oliver J. , Ward Benjamin D. , Amoroso Angelo J. , Pope Simon J. A.
Published: March 2016

1,8-Anthraquinone derivatives can act as low energy, visible light sensitizers for near-IR emitting lanthanides.
SnS nanosheets for efficient photothermal therapy
Authors: Ren Qilong , Li Bo , Peng Zhiyou , He Guanjie , Zhang Wenlong , Guan Guoqiang , Huang Xiaojuan , Xiao Zhiyin , Liao Lijun , Pan Yishuang , Yang Xiaojun , Zou Rujia , Hu Junqing
Published: March 2016

The demonstration that SnS nanosheets show better photothermal performance than bulk SnS shows promising potential for further exploration of 2D nanomaterials as an efficient photothermal agent.
A novel gas sensor based on porous α-Ni(OH)2 ultrathin nanosheet/reduced graphene oxide composites for room temperature detection of NOx
Authors: Yang Ying , Wang Hongjie , Wang Linlin , Ge Yunlong , Kan Kan , Shi Keying , Chen Junhong
Published: March 2016

Porous α-Ni(OH)2 TNS/rGO composites have a sensitivity of 64.4% and a response time of 10.0 s to 97.0 ppm NOx.
Nucleation and growth during a fluorogenic precipitation in a micro-flow mapped by fluorescence lifetime microscopy
Authors: Tran Vu Long , Génot Valérie , Audibert Jean-Frédéric , Prokazov Yury , Turbin Evgeny , Zuschratter Werner , Kim Hyeong-Ju , Jung Jaehun , Park Soo Young , Pansu Robert B.
Published: March 2016

The first observation, enumeration and mapping of the early states of crystallization during an anti-solvent precipitation.
Insights into the pore structure of KIT-6 and SBA-15 ordered mesoporous silica – recent advances by combining physical adsorption with mercury porosimetry
Authors: Guillet-Nicolas Rémy , Ahmad Riaz , Cychosz Katie A. , Kleitz Freddy , Thommes Matthias
Published: March 2016

The first successful example of Hg porosimetry on KIT-6 silicas is demonstrated. This study provides a more thorough understanding of the textural properties of the mesostructures of KIT-6 and SBA-15 silicas.
Identifying the cellular targets of natural products using T7 phage display
Authors: Piggott Andrew M. , Karuso Peter
Published: March 2016

A description of the T7 phage biopanning procedure is provided with tips and advice suitable for setup in a chemistry laboratory.
Size-dependent and distinguishing degenerated vortex states in ferroelectric nanodots under controllable surface charge conditions
Authors: Xiong W. M. , Jiang G. L. , Liu J. Y. , Sheng Qiang , Chen W. J. , Wang B. , Zheng Yue
Published: March 2016

Degenerated vortex states in ferroelectric nanodots are distinguished by characteristic short-circuit I–t curve under a controllable surface charge condition.
Multimodal theranostic assemblies: double encapsulation of protoporphyrine-IX/Gd3+in niosomes
Authors: Barlas F. Baris , Demir Bilal , Guler Emine , Senisik A. Murat , Arican H. Armagan , Unak Perihan , Timur Suna
Published: March 2016

Theranostically engineered protoporphyrin IX/Gd3+encapsulated niosomes were prepared and used as multimodal theranostic agent.
Metabolomic analysis of intestinal epithelial cell maturation along the crypt–villus axis
Authors: Yang Huansheng , Xiong Xia , Yin Yulong
Published: March 2016

The present experiment showed a gradual change in the metabolism of intestinal epithelial cells during maturation along CVA. Metabolism of fatty acids, amino acids, and glucose was significantly different between villus and crypt cells.
Studies directed towards nonyl acridine orange analogues having the potential to act as FRET donors with the PDT drug Pc 4
Authors: Zhang Ping , Yang Yang , Liu Yun , Rodriguez Myriam E. , Kenney Malcolm E.
Published: March 2016

Analogues of nonyl acridine orange (NAO) were made by quaternization of substituted acridine oranges. The Pc 4-FRET occurrence of these NAO analogues in cells was investigated.
Regeneration of hyaline-like cartilage and subchondral bone simultaneously by poly(l-glutamic acid) based osteochondral scaffolds with induced autologous adipose derived stem cells
Authors: Zhang Kunxi , He Shiming , Yan Shifeng , Li Guifei , Zhang Danqing , Cui Lei , Yin Jingbo
Published: March 2016

Osteochondral tissue engineering is challenged by the difficulty in the regeneration of hyaline cartilage and the simultaneous regeneration of subchondral bone.
Particle-based photodynamic therapy based on indocyanine green modified plasmonic nanostructures for inactivation of a Crohn's disease-associated Escherichia coli strain
Authors: Jijie Roxana , Dumych Tetiana , Chengnan Li , Bouckaert Julie , Turcheniuk Kostiantyn , Hage Charles-Henri , Heliot Laurent , Cudennec Benoit , Dumitrascu Nicoleta , Boukherroub Rabah , Szunerits Sabine
Published: March 2016

Particle-based photodynamic therapy (PPDT) holds great promise in theranostic applications.
Sensitive detection of intracellular RNA of human telomerase by using graphene oxide as a carrier to deliver the assembly element of hybridization chain reaction
Authors: Shi Zhilu , Zhang Xiafei , Cheng Rui , Li Baoxin , Jin Yan
Published: March 2016

An enzyme-free amplification strategy has been developed for sensitively and specifically detecting intracellular RNA of telomeraseviaGO-aided hybridization chain reaction (HCR).
Fast solid-phase extraction of N-linked glycopeptides by amine-functionalized mesoporous silica nanoparticles
Authors: Miao Weili , Zhang Cheng , Cai Yan , Zhang Ying , Lu Haojie
Published: March 2016

For the first time, mesoporous material has been introduced into N-glycoproteome extraction based on a reductive amination reaction, which greatly enhanced the enrichment efficiency and deglycosylation efficiency.
Electrochemical detection of protein glycosylation using lectin and protein–gold affinity interactions
Authors: Yadav Sharda , Carrascosa Laura G. , Sina Abu A. I. , Shiddiky Muhammad J. A. , Hill Michelle M. , Trau Matt
Published: March 2016

New electrochemical method to detect glycosylation of protein using lectin and protein gold interaction.
Calcium phosphate-based organic–inorganic hybrid nanocarriers with pH-responsive on/off switch for photodynamic therapy
Authors: Nomoto Takahiro , Fukushima Shigeto , Kumagai Michiaki , Miyazaki Kozo , Inoue Aki , Mi Peng , Maeda Yoshinori , Toh Kazuko , Matsumoto Yu , Morimoto Yuji , Kishimura Akihiro , Nishiyama Nobuhiro , Kataoka Kazunori
Published: March 2016

Organic–inorganic hybrid nanocarriers permit efficient photodynamic therapy with reduced damage to normal tissues.
Integration of protein tethering in a rapid and label-free SERS screening platform for drugs of abuse
Authors: Siddhanta Soumik , Wróbel Maciej S. , Barman Ishan
Published: March 2016

This report proposes a label-free, versatile approach for screening drugs of abuse using a combination of protein tethering and surface-enhanced Raman spectroscopy.
Synergistic eradication of antibiotic-resistant bacteria based biofilms in vivo using a NIR-sensitive nanoplatform
Authors: Dong Kai , Ju Enguo , Gao Nan , Wang Zhenzhen , Ren Jinsong , Qu Xiaogang
Published: March 2016

A novel multifunctional NIR-sensitive nanoplatform has been developed, which could synergistically eradicate biofilms and combat biofilm-associated infections.
Polar alicyclic rings: synthesis and structure of all cis-1,2,3,4-tetrafluorocyclopentane
Authors: Fang Zeguo , Al-Maharik Nawaf , Slawin Alexandra M. Z. , Bühl Michael , O'Hagan David
Published: March 2016

All-cis-1,2,3,4-tetrafluorocyclopentane is synthesised and experiment and theory data reveal a very highly polar aliphatic with Janus like electropositive and electronegative faces.
Neptunium and plutonium complexes with a sterically encumbered triamidoamine (TREN) scaffold
Authors: Brown Jessie L. , Gaunt Andrew J. , King David M. , Liddle Stephen T. , Reilly Sean D. , Scott Brian L. , Wooles Ashley J.
Published: March 2016

The syntheses and characterisation of isostructural neptunium(iv) and plutonium(iv) complexes [AnIV(TRENTIPS)(Cl)] [An = Np, Pu; TRENTIPS = {N(CH2CH2NSiPri3)3}3−] are reported.
Zn-modified ceria as a redox material for thermochemical H2O and CO2 splitting: effect of a secondary ZnO phase on its thermochemical activity
Authors: Lin Fangjian , Samson Vallerie A. , Wismer Andrea O. , Grolimund Daniel , Alxneit Ivo , Wokaun Alexander
Published: March 2016

A detrimental effect of a secondary ZnO phase in Zn-modified ceria on its activity for thermochemical H2O and CO2 splitting is elucidated.
Biexponential photon antibunching: recombination kinetics within the Förster-cycle in DMSO
Authors: Vester Michael , Grueter Andreas , Finkler Björn , Becker Robert , Jung Gregor
Published: March 2016

Recombination kinetics of the fully separated and the solvent separated ion-pair is deduced from biexponential photon antibunching of photoacids in DMSO.
Electrochemical synthesis of poly(3-aminophenylboronic acid) in ethylene glycol without exogenous protons
Authors: Wang Feifan , Zou Feixue , Yu Xinxin , Feng Zhenyu , Du Na , Zhong Yaohua , Huang Xirong
Published: March 2016

In ethylene glycol the electropolymerization of 3-aminophenylboronic acid can been realized without exogenous hybridization agent and protons.
Room-temperature catalytic oxidation of formaldehyde on catalysts
Authors: Nie Longhui , Yu Jiaguo , Jaroniec Mietek , Tao Franklin Feng
Published: March 2016

Room-temperature catalytic oxidative decomposition of harmful formaldehyde (HCHO) in indoor air is summarized.
Supercritical water as a feasible reaction environment for the syntheses of hybrid nanocrystallites with strong metal–support interaction
Authors: Weng X. L. , Tan D. D. , Cao X. L. , Zhang J. Y. , Wu Z. B.
Published: March 2016

We provide direct evidence that supercritical water (sc-H2O) has a significant capacity to enhance the metal–support interaction of hybrid nanocrystallites.
Water oxidation catalysis with ligand substituted Ru–bpp type complexes
Authors: Roeser Stephan , Bozoglian Fernando , Richmond Craig J. , League Aaron B. , Ertem Mehmed Z. , Francàs Laia , Miró Pere , Benet-Buchholz Jordi , Cramer Christopher J. , Llobet Antoni
Published: March 2016

The influence of electronic effects over Ru–bpp water oxidation catalysts.
Epoxidation using molecular oxygen in flow: facts and questions on the mechanism of the Mukaiyama epoxidation
Authors: Vanoye Laurent , Wang Jiady , Pablos Mertxe , de Bellefon Claude , Favre-Réguillon Alain
Published: March 2016

Mukaiyama reaction was performed G/L continuous-flow microreactor. In less than 5 minutes at room temperature, cyclooctene was efficiently transformed to the corresponding epoxide using O2 as oxidant and aldehyde as co-reductant.
Asiatic acid attenuated apoptotic and inflammatory stress in the striatum of MPTP-treated mice
Authors: Chao Pei-chun , Lee Hsiang-lin , Yin Mei-chin
Published: March 2016

The effects of post-treatments with asiatic acid (AA) at 20, 40 or 80 mg per kg BW per day against apoptotic, oxidative and inflammatory injury in the striatum of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-treated mice were examined.
Fast and efficient synthesis of Zorro-LNA type 3′-5′-5′-3′ oligonucleotide conjugates via parallel in situ stepwise conjugation
Authors: Gissberg O. I. , Jezowska M. , Zaghloul E. M. , Bungsu N. I. , Strömberg R. , Smith C. I. E. , Lundin K. E. , Honcharenko M.
Published: March 2016

Zorro-LNA is a new class of therapeutic anti-gene oligonucleotides (ONs) capable of invading supercoiled DNA.
A synthetic route to ultra-high molecular weight polystyrene (>106) with narrow molecular weight distribution by emulsifier-free, emulsion organotellurium-mediated living radical polymerization (emulsion TERP)
Authors: Kitayama Yukiya , Okubo Masayoshi
Published: March 2016

We propose a route to synthesizing ultra-high molecular weight (>106) polystyrene (PS) having a narrow molecular weight distribution by controlled/living radical polymerization.
Hierarchical self-assembly of protoporphyrin IX-bridged Janus particles into photoresponsive vesicles
Authors: Xu Youqian , Wang Liang , Zhu Xinyun , Wang Cai-Qi
Published: March 2016

Photoresponsive vesicles formed by PPIX-bridged Janus particles exhibited excellent photostability against intense infrared radiation and good singlet oxygen producing ability.
Investigation of the preparation and superior properties of novel propylene-based elastic HMAs
Authors: Chang Hefei , Ma Yi , Liang Wenbin , Lai Shih-yaw
Published: March 2016

The propylene-based elastic HMAs with higher adhesive and elasticity had excellent ability of weather resistance, which alleviated the interface delamination caused by the different thermal shrinkage between the steel and plastic interface.
Adsorption of berberine hydrochloride onto mesoporous carbons with tunable pore size
Authors: Li Yin , Lu Xiuyang , Yang Ruiqin , Tong Weijian , Xu Lijun , de Bondelon Lucas , Wang Hongpeng , Zhu Ju , Ge Qing
Published: March 2016

TEM image of one mesoporous carbon adsorbent and the adsorption breakthrough curve of berberine hydrochloride on the carbon sample.
Rheological properties and crystallization behavior of comb-like graft poly(l-lactide): influences of graft length and graft density
Authors: Leng Xuefei , Wei Zhiyong , Bian Yufei , Ren Yingying , Wang Yurong , Wang Qinyi , Li Yang
Published: March 2016

Radius growth rate of spherulites (G) versus crystallization temperature (Tc) for graft PLLA with different graft density and graft length.
Barrigenol triterpenes from the husks of Xanthoceras sorbifolia Bunge and their antitumor activities
Authors: Wang Da , Su Dan , Li Xian-Zhe , Liu Dan , Xi Rong-Gang , Gao Hui-Yuan , Wang Xiao-Bo
Published: March 2016

New barrigenol derivatives from the husks Xanthoceras sorbifolia Bunge and their anti-tumor activities.
Helical supramolecular organization of a 1,2-diol appended naphthalene diimide organogelator via an extended intermolecular H-bonding network
Authors: Shinde Sopan Valiba , Kulkarni Mandar , Talukdar Pinaki
Published: March 2016

Hydrogen bonded self-assembly of a 1,2-diol linked naphthalene diimide derivative features M-helical and J-type aggregation. In MCH/CHCl3, the compound exhibits intense yellow excimer and thermoreversible “sol–gel” behavior.
Selectively enhanced sensing performance for oxidizing gases based on ZnO nanoparticle-loaded electrospun SnO2 nanotube heterostructures
Authors: Diao Kaidi , Huang Yunpeng , Zhou Minjie , Zhang Jicheng , Tang Yongjian , Wang Shuxia , Liu Tianxi , Cui Xudong
Published: March 2016

In this work, we present gas sensors based on ZnO nanoparticle-loaded electrospun SnO2 nanotube (ZnO/SnO2) n–n heterostructures (HSs) synthesized by electrospinning combined with facile thermal decomposition.
Synthesis and antitumor activity evaluation of novel substituted 5H-benzo[i][1,3,4]thiadiazolo[3,2-a]quinazoline-6,7-diones
Authors: Wu Liqiang , Zhang Chong
Published: March 2016

A series of novel substituted 5H-benzo[i][1,3,4]thiadiazolo[3,2-a]quinazoline-6,7-diones were synthesized and all compounds exhibited excellent antitumor activities.
Structural, magnetic, magneto-transport properties and Bean–Rodbell model simulation of disorder effects in Cr3+ substituted La0.67Ba0.33MnO3 nanocrystalline synthesized by modified Pechini method
Authors: Oumezzine Marwène , Amaral J. S. , Mompean F. J. , Hernández Mar García , Oumezzine Mohamed
Published: March 2016

Nanocrystalline powders (around 100 nm) of La0.67Ba0.33CrxMn1−xO3 (x ≤ 0.17) perovskites have been synthesized by the sol–gel based Pechini method at low temperatures.
On the dissolution state of cellulose in aqueous tetrabutylammonium hydroxide solutions
Authors: Behrens M. A. , Holdaway J. A. , Nosrati P. , Olsson U.
Published: March 2016

We have characterized the dissolution state of microcrystalline cellulose (MCC) in aqueous 40 wt% tetrabutylammonium hydroxide (TBAH) using a combination of light and small angle X-ray scattering, up to 0.1 g cm−3.
Flexible and wearable fiber shaped high voltage supercapacitors based on copper hexacyanoferrate and porous carbon coated carbon fiber electrodes
Authors: Senthilkumar S. T. , Kim Junsoo , Wang Yu , Huang Haitao , Kim Youngsik
Published: March 2016

Fiber supercapacitors have been considered as one of the promising candidates for light weight, flexible and wearable energy storage devices.
Cobalt oxide-coated N- and B-doped graphene hollow spheres as bifunctional electrocatalysts for oxygen reduction and oxygen evolution reactions
Authors: Jiang Zhongqing , Jiang Zhong-Jie , Maiyalagan Thandavarayan , Manthiram Arumugam
Published: March 2016

Co3O4-coated N- and B-doped graphene hollow spheres synthesized by a simple and scalable method have been used as electrocatalysts for the ORR and the OER, demonstrating higher electrochemical performance and better durability than commercial Pt/C and RuO2/C, respectively.
Harvesting‐throughput tradeoff for RF‐powered underlay cognitive radio networks
Authors: Zheng Meng , Xu Chi , Liang Wei , Yu Haibin
Published: March 2016

A green cognitive radio that is solely powered by an energy harvester which extracts energy from the RF signal of a primary user transmitter is considered. The cognitive radio operates in a harvesting–transmitting fashion with the period of one time slot. In each period, it first harvests energy for a fixed duration and then transmits data using the harvested energy for the rest of the period. Considering the intrinsic harvesting‐throughput tradeoff, we optimise the harvesting ratio of the cognitive radio to maximise its achievable throughput, subject to the interference constraint by the primary user receiver. It is shown that the formulated optimisation problem is convex and we derive a closed‐form expression for the optimal harvesting ratio. Simulations validate the correctness and analyse the achievable throughput and optimal harvesting ratio under different parameters.
Precise error‐rate performance with distributed antenna selection transmission over Nakagami‐m fading channels
Authors: Wang Qing , Liu Ju , Zhai Chao , Liu Yuxi , Wang Xinhua , Ma Shuang
Published: March 2016

This study investigates the downlink error‐rate performance for a multicell distributed antenna system (DAS) over Nakagami‐m fading channels, where arbitrary number of remote antenna units are uniformly deployed within each macrocell. An antenna selection transmission scheme is presented to reduce the power consumption and the number of interfering signals from outside the target macrocell. Unlike most previous studies in which the interference plus noise is assumed to be Gaussian distributed with constant variance, the co‐channel interference here is considered as a random variable. The authors first derive a closed‐form bit error rate (BER) expression by adopting the commonly used Gaussian‐Q‐function approximation. Furthermore, consider the desired signal and the interfering signals undergo different fading severities, they derive a precise BER expression in terms of single‐integral by applying the characteristic function. For the special case of Rayleigh fading, an exact closed‐form BER expression is obtained. Finally, these error‐rate expressions which can be evaluated efficiently indicate some significant insights into the characteristics of the antenna selection transmission for DAS. Simulation results are provided to validate their theoretical analysis.
Performance study of opportunistic scheduling in dual‐hop multi‐user underlay cognitive network
Authors: Hussein Jamal , Ikki Salama , Boussakta Said , Tsimenidis Charalampos
Published: March 2016

In this study, the authors investigate the performance of opportunistic scheduling for the dual‐hop amplify‐and‐forward multi‐user cognitive relaying network. Expressions are derived for the cumulative distribution function (CDF) and probability density function of the equivalent signal‐to‐noise ratio (SNR). From the derived CDF, the outage performance of the cognitive network is investigated. Then, an expression for average error probability is derived. Furthermore, simple and generic asymptotic expressions for the outage and error probabilities are obtained and discussed. In addition, a closed‐form expression for the system's ergodic capacity is derived. Their asymptotic results show that opportunistic scheduling has no impact on diversity gain. It is confirmed that the array gain determines the SNR advantage of opportunistic scheduling over the single‐user scenario. Moreover, they study adaptive power allocation under the total transmit power constraint in order to minimise the average error probability. As expected, the results show that optimum power allocation improves system performance compared with uniform power allocation. Finally, numerical results and Monte Carlo simulations are also provided to support the correctness of the analytical calculations.
Distributed consensus via self‐triggered output feedback
Authors: Zhao Jianfeng , Xiang Linying , Chen Fei , Lan Weiyao
Published: March 2016

The consensus problem based on output feedback is addressed in this study for general linear multi‐agent systems under a distributed self‐triggered control framework. Two kinds of distributed output feedback control algorithms, one for local static output feedback and the other for observer‐type dynamic feedback, are designed to solve the consensus problem by employing the distributed self‐triggered control strategy, where each agent calculates its next update instant based on the local information at the last update instant. It is shown that consensus can be reached asymptotically under the two proposed control algorithms. Finally, two simulation examples are given to verify the theoretical results.
Two‐layer discriminative model for human activity recognition
Authors: Selmi Mouna , El‐Yacoubi Mounîm A. , Dorizzi Bernadette
Published: March 2016

Most of recent methods for action/activity recognition, usually based on static classifiers, have achieved improvements by integrating context of local interest point (IP) features such as spatiotemporal IPs by characterising their neighbourhood under different scales. In this study, the authors propose a new approach that explicitly models the sequential aspect of activities. First, a sliding window segmentation technique splits the video stream into overlapping short segments. Each window is characterised by a local bag of words of IPs encoded by motion information. A first‐layer support vector machine provides for each window a vector of conditional class probabilities that summarises all discriminant information that is relevant for sequence recognition. The sequence of these stochastic vectors is then fed to a hidden conditional random field for inference at the sequence level. They also show how their approach can be naturally extended to the problem of conjoint segmentation and recognition of a sequence of action classes within a continuous video stream. They have tested their model on various human action and activity datasets and the obtained results compare favourably with current state of the art.
Probability‐based method for boosting human action recognition using scene context
Authors: Zhang Hong‐Bo , Lei Qing , Chen Duan‐Sheng , Zhong Bi‐Neng , Peng Jialin , Du Ji‐Xiang , Su Song‐Zhi
Published: March 2016

In this study, the authors investigate the possibility of boosting action recognition performance by exploiting the associated scene context. Towards this end, the authors model a scene as a mid‐level ‘middle layer’ in order to bridge action descriptors and action categories. This is achieved via a scene topic model, in which hybrid visual descriptors, including spatial–temporal action features and scene descriptors, are first extracted from a video sequence. Then, the authors learn a joint probability distribution between scene and action using a naive Bayes nearest neighbour algorithm, which is adopted to jointly infer the action categories online by combining off‐the‐shelf action recognition algorithms. The authors demonstrate the advantages of their approach by comparing it with state‐of‐the‐art approaches using several action recognition benchmarks.
Facial expression recognition via sparse representation using positive and reverse templates
Authors: Jiang Xingguo , Feng Bin , Jin Liangnian
Published: March 2016

This study models facial expression recognition with a sparse representation classification (SRC) method. By analysing SRC's robustness to noise, this study further proposes an SRC method based on positive and reverse templates (PRTs‐SRC), which uses PRTs to expand an over‐complete dictionary constructed by training samples. The expanded dictionary can contain more information, and increase the robustness to noise. To validate the performance of the proposed algorithm, experiments were carried out on relevant expression databases. The authors compared and analysed the recognition performances for the proposed algorithm and other methods. The results show that even with high noise levels, the proposed algorithm performs above 80% recognition rate.
Distortion‐free secret image sharing method with two meaningful shadows
Authors: Chang Ching‐Chun , Liu Yanjun , Wu Hsiao‐Ling
Published: March 2016

In this study, the authors propose a novel (2, 2) secret image sharing scheme in which a control parameter ω is used to change the payload easily. Since the modification of the original cover pixel values can be limited within a small range according to the value of ω, the shadow images can achieve excellent visual quality. In the extracting process, the secret image and the cover image can be reconstructed correctly. Experimental results showed that the authors’ proposed scheme can enhance the embedding rate significantly, up to 3 bpp if ω is set to 6. In addition, the peak signal‐to‐noise ratio values of the shadow images are still satisfactory when the embedding rate approaches a very high value. Comparisons demonstrated that their proposed scheme outperforms other schemes that have been developed recently in terms of the embedding rate and the visual quality.
Generalised capacitive‐loading method for miniaturisation of forward‐wave directional coupled‐line couplers with arbitrary strip impedances and coupling levels
Authors: Ha Jungje , Lee Yongshik
Published: March 2016

This study demonstrates a capacitive reactive loading method for forward‐wave couplers based on coupled lines. With the method, a miniaturised forward‐wave coupler can be designed by loading either a symmetric or an asymmetric coupled line with shunt capacitors symmetrically or asymmetrically. The method is a generalised version of all previous shunt capacitive loading methods for miniaturisation of forward‐wave coupled‐line couplers since it provides complete control of not only the maximum coupling level, but also the impedances of the two strips. For the first time, a forward‐wave coupled‐line coupler is demonstrated that provides an arbitrary maximum coupling level based on 50‐Ω lines. Therefore, lengthy and/or complicated impedance matching networks can be eliminated, a more effective miniaturisation is enabled, and performance degradation associated with the additional circuitry is minimised. Experimental results of various forward‐wave couplers based on quasi‐symmetric and asymmetric coupled lines with various coupling levels and strip impedances are provided to demonstrate the versatility of the proposed method.
Modelling analysis and power loss of coupled‐inductor single‐stage boost inverter based grid‐connected photovoltaic power system
Authors: Zhou Yufei , Huang Wenxin , Hong Feng , Wang Chenghua
Published: March 2016

The coupled‐inductor single‐stage boost inverter (CI‐SSBI) has been proposed and applied to photovoltaic (PV) power system. As previously presented, the CI‐SSBI has the feature of stepping up input voltage to a higher voltage level by properly designing the turns ratio of coupled inductor and regulating the shoot‐through duty cycle. The CI‐SSBI based grid‐connected PV system integrates some characteristics together in one stage, including boost inversion, feeding current into the grid with high power factor, and maximum power point tracking. Moreover, system reliability can be improved by using the shoot‐through zero states as a normal operation mode. This study focuses on the power loss analysis of main elements, and control analysis of both bus voltage loop and inner current loop of the proposed PV system. Simulation and experimental results are presented to verify the analysis and show the real system performance.
Magnetically coupled boost converter with enhanced equivalent series resistance filter capacitor for DC microgrid
Authors: Garg Mukul , Singh Rajeev Kumar , Mahanty Ranjit
Published: March 2016

A magnetically coupled boost (MCB) converter with the enhanced equivalent series resistance (ESR) of the filter capacitor for DC microgrid applications has been presented in this study. The proposed MCB converter with enhanced ESR filter capacitor uses only four state variables and exhibits a fourth‐order minimum phase behaviour because of the complete elimination of right half plane zero. The characteristic of displaying fourth‐order minimum phase behaviour of the proposed MCB converter with the enhanced ESR filter capacitor makes the design and analysis simple. Closed‐loop operation of the proposed MCB converter with the enhanced ESR filter capacitor with photovoltaic input using maximum power point tracking has been carried out to verify its applicability in DC microgrid. Steady state and dynamic modelling of the MCB converter has been carried out to demonstrate its advantages. The proposed algorithm is validated on a 145 W prototype through simulation and experimentation.
Highly efficient and reliable inverter concept‐based transformerless photovoltaic inverters with tri‐direction clamping cell for leakage current elimination
Authors: Mei Ye , Hu Senjun , Lin Lei , Li Wuhua , He Xiangning , Cao Fengwen
Published: March 2016

Single‐phase transformerless inverters are widely employed in grid‐connected photovoltaic systems, because they are light, inexpensive and most importantly, have high conversion efficiencies. The highly efficient and reliable inverter concept (HERIC) is a well‐known topology for transformerless inverters. Theses inverters, however, suffer from high‐frequency leakage current generated by parasitic parameters. The mechanism behind the leakage current is described in this study. The concept of tri‐direction clamping cell (TDCC) applied to HERIC‐based transformerless inverters is proposed to eliminate the leakage current. This is achieved by clamping the freewheeling voltage to the midpoint voltage of the DC bus capacitors. A derived HERIC‐based inverter has been selected to be connected with a TDCC that is constructed from three active switches in Y‐type connection. This circuit is analysed in detail as an example in order to investigate the circuit performance. The experimental results show that the derived inverter has the advantages of leakage current elimination, high conversion efficiency and low grid current total harmonic distortion.
Vivantes und niedergelassene
Authors: Gaede Kirsten
Published: March 2016

Berliner Urologen wollen zusammenarbeiten: Geplant sind gemeinsame Versorgungskonzepte und ambulante OP-Zentren. Außerdem werden die Niedergelassenen Bereitschaftsdienste sowie Operationen übernehmen.
Hoffen auf den Aufschwung
Authors: Schmidt Hartmut
Published: March 2016

Die bevorstehende Bundestagswahl versetzt die Börse in Aufbruchstimmung. Die Anleger hoffen, dass ein Regierungswechsel die Konjunktur in Schwung bringen könnte. Die deutschen Klinikaktien konnten von dem Stimmungswechsel allerdings nicht profitieren: Die meisten von ihnen entwickelten sich schlechter als der Markt.
Einen Schritt voraus
Authors: Heuer Claudia
Published: March 2016

Wenn alle das Gleiche wollen, beispielsweise das Wohl des Patienten, dann ist das einen Preis wert. Dies fand auch die Jury des VHitG-Awards und zeichnete das Praxisnetz Vorderpfalz (Pravo) als “IT-Konzept des Jahres” aus. Ein Vorschlag aus dem Bereich der niedergelassenen Vertragsärzteschaft.
Porträt Axel Ekkernkamp
Authors: Stern Sara
Published: March 2016

Axel Ekkernkamp ist Arzt, Manager und Politiker – und überall ist er gut. Er hat das Unfallkrankenhaus Berlin zum Erfolg geführt, saß in der Herzog-Kommission und trägt das Bundesverdienstkreuz. Erfolg hat er, weil er sich seinen Projekten mit Leidenschaft widmet und weil er die Menschen in seiner Umgebung ernst nimmt.
Beruf: Interner Betrugspräventeur
Authors: Heuer Claudia
Published: March 2016

Wirtschaftskriminalität wird in Deutschland sehr ernst genommen. Doch sowohl Mitarbeiterschulung als auch Risikomanagementsysteme sind eher Fehlanzeige. Die Steinbeis Hochschule Berlin GmbH hat dieses Desiderat ausgemacht und bietet einen berufsbegleitenden Studiengang zum internen Betrugsermittler an.
Neue Regeln, neue Risiken
Authors: Akra Walid , Ghanaat Henrik
Published: March 2016

Verbandsnachrichten der FKT - Fachvereinigung Krankenhaustechnik (e. V.). Diese Seiten sind nur als PDF-Dokument verfügbar.