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https://www.readbyqxmd.com/read/28738669/evaluation-of-the-effectiveness-of-a-transfer-interhemispheric-training-programme-in-the-early-stages-of-fencing-training
#1
Mateusz Witkowski, Michał Bronikowski, Agnieszka Nowik, Maciej Tomczak, Jan Strugarek
BACKGROUND: A high level of motor coordination (with an emphasis on the accuracy of hand movements) is an important part of fencers' training. Research on motor coordination shows that both hemispheres of the brain are involved in controlling the action of each of the upper limbs. As the physical training of one hand is believed to significantly increase the performance of the other (untrained) hand [14], the authors attempt to verify the hypothesis that specialized training of the nondominant limb can improve the performance of the dominant hand in fencing...
July 24, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28738657/a-new-strategy-for-fabrication-of-water-dispersible-and-biodegradable-fluorescent-organic-nanoparticles-with-aie-and-esipt-characteristics-and-their-utilization-for-bioimaging
#2
Dazhuang Xu, Meiying Liu, Hui Zou, Jianwen Tian, Hongye Huang, Qing Wan, Yanfeng Dai, Yuanqing Wen, Xiaoyong Zhang, Yen Wei
Fluorescence probes play a crucial role in optical imaging for visualization of complex biological processes. As compared with conventional organic fluorogens, the probes with aggregation-induced emission (AIE) and excited-state intramolecular proton transfer (ESIPT) characteristics show significant advantages in high quantum yield at concentrated and aggregated state, large Stokes shift and low cytotoxicity. However, the synthesis of AIE-active fluorescent probes through the ESIPT mechanism has received only very limited attention...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738656/an-ultrasensitive-fluorescent-nanosensor-for-trypsin-based-on-upconversion-nanoparticles
#3
Mingmin Wu, Xiaoyong Wang, Kun Wang, Zijian Guo
Trypsin and its inhibitors are relevant to many physiological processes and diseases. In this study, a nanosensor capable of detecting trypsin and its inhibitors was designed based on the fluorescence resonance energy transfer (FRET) between upconversion nanoparticle (UCNP) and gold nanoparticle (AuNP). UCNP and AuNP were linked by a trypsin-sensitive peptide DDDDARC, forming the non-fluorescent UCNP-peptide-AuNP nanosensor. In the presence of trypsin, the peptide was cleaved and the quenched fluorescence was restored; in the presence of trypsin inhibitors, the recovery of the fluorescence was decreased...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738649/well-defined-magnetic-surface-imprinted-nanoparticles-for-selective-enrichment-of-2-4-dichlorophenoxyacetic-acid-in-real-samples
#4
Le Sheng, Yulong Jin, Yonghuan He, Yanyan Huang, Liushui Yan, Rui Zhao
Superparamagnetic core-shell molecularly imprinted polymer nanoparticles (MIPs) were prepared via surface initiated reversible-addition fragmentation chain transfer (si-RAFT) polymerization for the selective recognition of 2,4-dichlorophenoxyacetic acid (2,4-D) in real samples. The construction of uniform core-shell structure with a 50nm MIP layer was successfully accomplished, which favored mass transfer and resulted in fast recognition kinetics. The static equilibrium experiments revealed the satisfied adsorption capacity and imprinting efficiency of Fe3O4@MIP...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738614/in-situ-synthesis-of-reduced-graphene-oxide-gold-nanoparticles-modified-electrode-for-speciation-analysis-of-copper-in-seawater
#5
Ming Liu, Dawei Pan, Wen Pan, Yun Zhu, Xueping Hu, Haitao Han, Chenchen Wang, Dazhong Shen
In this paper, reduced graphene oxide/gold nanoparticle/Nafion (rGO/AuNP/Nafion) modified electrode was fabricated through in-situ synthesis and used for determination of copper ions in strong salt electrolyte (0.5M NaCl) by differential pulse anodic stripping voltammetry (DPASV). This in-situ synthesis procedure was based on the ion-exchange and electrochemical reduction. The use of rGO provided a larger electrode surface and the presence of more active sites, while electron transfer was accelerated by incorporating AuNPs...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738597/sensitive-detection-of-sulfide-based-on-the-self-assembly-of-fluorescent-silver-nanoclusters-on-the-surface-of-silica-nanospheres
#6
Yehan Yan, Kui Zhang, Huan Yu, Houjuan Zhu, Mingtai Sun, Tasawar Hayat, Ahmed Alsaedi, Suhua Wang
Hydrogen sulfide is a toxic and flammable gaseous pollutant often emitted to air as a by-product of water supply, chemical, petroleum and coal industries. It can be transferred into sulfur dioxide in the air under some meteorologic conditions. Herein, we report a novel ratiometric fluorescence method for hydrogen sulfide based on silver nanoclusters and quantum dots. The silver nanoclusters have been self-assemblied onto the surface of silica spheres, which are embedded with red fluorescent quantum dots, to form a dual-emissive nanohybrid...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738593/boron-nitride-nanosheets-as-a-platform-for-fluorescence-sensing
#7
Yuanjin Zhan, Jingjing Yan, Mei Wu, Longhua Guo, Zhenyu Lin, Bin Qiu, Guonan Chen, Kwok-Yin Wong
Hexagonal boron nitride nanosheets (BNNS), one kind of inorganic graphene analogue, exhibit high fluorescence quenching ability via the photo-induced electron transfer (PET) and different affinity toward single-stranded DNA (ssDNA) and double-stranded DNA (dsDNA). As a proof of concept, the BNNS was first used as a sensing platform for the rapid detection of DNA and small molecules with high sensitivity and selectivity in this study. This strategy is versatile and quick fluorescence sensing of DNA and extensive DNA related analytes such as metal cations and small molecules...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738576/development-of-ph-responsive-polymer-and-citrate-aqueous-two-phase-system-for-extractive-bioconversion-of-cefprozil
#8
Jialing Chen, Zhaoyang Ding, Hongxia Pan, Xuejun Cao
A pH-responsive aqueous two-phase system (pH-ATPS) has been developed by sodium citrate and a recyclable pH-responsive polymer PADB6.8 that can response to the change of pH values. Phase separation mechanism is studied through Low field-NMR. All variables affecting the phase separation are evaluated. Phase characteristics (viscosity, density, interfacial tension) and phase separation kinetic are studied for understanding of separation process and operational parameters in applications. This pH-ATPS has the characters of low interfacial tension, high recovery leading efficient mass transfer and low cost...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738574/a-highly-selective-and-sensitive-fluorescent-probe-for-hypochlorous-acid-and-its-lysosome-targetable-biological-applications
#9
Chang Liu, Xiaojie Jiao, Song He, Liancheng Zhao, Xianshun Zeng
A novel lysosome-targetable fluorescence probe PT-1 based on a photoinduced electron transfer (PET) mechanism has been designed and synthesized. For comparison, the probe PT-2 without morpholine moiety as a lysosome-directing group was also synthesized and investigated. Probes PT-1 and PT-2 exhibited high selectivity, high sensitivity (with the detection limits down to the 10(-10)M range) and response in real time (within 10s) toward HOCl over other reactive oxygen species (ROS). Both PT-1 and PT-2 were cell permeable and enabled them to be used for monitoring of HOCl in living cells...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738561/silver-triangular-nanoplates-as-an-high-efficiently-fret-donor-acceptor-of-upconversion-nanoparticles-for-ultrasensitive-turn-on-off-protamine-and-trypsin-sensor
#10
Hongyu Chen, Aijin Fang, Youyu Zhang, Shouzhuo Yao
Silver triangular nanoplates (STNPs) as a high efficient fluorescence quenching reagent of upconversion nanoparticles (UCNPs) was used to constract a novel label-free fluorescence nanosensor for ultrasensitive detection of protamine and trypsin based on fluorescence resonance energy transfer (FRET) between STNPs and UCNPs. In this assay, the negatively charged STNPs can bind with positively charged UCNPs through electrostatic interaction, and then quenched the fluorescence of UCNPs. When protamine was added to the mixture of UCNPs-STNPs, the STNPs interacted with protamine and then detached from the surface of UCNPs and aggregated, which result in the recovery of the fluorescence of UCNPs...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738556/development-of-a-new-sample-preparation-method-based-on-liquid-liquid-liquid-extraction-combined-with-dispersive-liquid-liquid-microextraction-and-its-application-on-unfiltered-samples-containing-high-content-of-solids
#11
Mir Ali Farajzadeh, Maryam Abbaspour
A new sample preparation method based on liquid-liquid-liquid extraction combined with dispersive liquid-liquid microextraction followed by gas chromatography-flame ionization detection has been reported for the extraction/preconcentration and determination of trace levels of twelve pesticide residues from different samples with high content of solids without filtration. This method consists of a three-phase system including an aqueous phase (sample solution), acetonitrile, and hexane. The extraction mechanism is based on different affinities of the substances from the sample matrices towards each of the involved phase, which provides a high selectivity to the process...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738527/evaluation-of-heavy-metal-mobilization-in-creek-sediment-influence-of-rac-values-and-ambient-environmental-factors
#12
Guannan Liang, Bo Zhang, Mao Lin, Simiao Wu, Hao Hou, Jia Zhang, Guangren Qian, Xin Huang, Jizhi Zhou
The risk assessment code (RAC) is a common method for assessing heavy metal (HM) mobility and their potential health risks, based on HM total concentration and chemical speciation. In this study, both the RAC and the influence of ambient environmental factors were investigated in a river sediment system. Sixty-eight sediment samples were collected from the main river system in Shanghai, China. The total concentration and chemical speciation of Cu, Zn, Ni, Pb, Cd, Cr, As, and Hg were determined in the samples...
July 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28738473/-hoof-genotyping-characteristics-of-brucella-melitensis-strains-isolated-in-ulanqab-of-inner-mongolia-autonomous-region
#13
Z G Liu, M Wang, R H Liu, X J Shang, B Y Cui
Objective: To investigate the HOOF genotyping characteristics of 83 Brucella (B.) melitensis strains isolated in Ulanqab of Inner Mongolia Autonomous Region from 2012 to 2015. Methods: A total of 83 B. melitensis strains were detected by convention identification and AMOS-PCR, then HOOF protocol with eight VNTR locus were used for the genotyping of the strains, and the allelic diversity of each VNTR locus and the discriminatory power of VNTR typing of HOOF were assessed by Hunter-Gaston Discriminatory index...
July 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28738446/single-stage-versus-two-stage-arteriovenous-loop-microsurgical-reconstruction-a-meta-analysis-of-the-literature
#14
REVIEW
Rebecca Knackstedt, Rachel Aliotta, James Gatherwright, Risal Djohan, Brian Gastman, Graham Schwarz, Mark Hendrickson, Raffi Gurunluoglu
BACKGROUND: Arteriovenous (AV) loops can be utilized in a single- or two-stage approach in free flap reconstruction when proper vessels are not available. However, there exists no consensus on which method leads to superior microsurgical and patient outcomes. The purpose of this article was to review single- versus two-stage AV loops utilized in free flap reconstruction with a focus on complications and overall outcomes. METHODS: A systematic review of AV loops for autologous free tissue transfer was conducted...
July 24, 2017: Microsurgery
https://www.readbyqxmd.com/read/28738265/ground-state-charge-transfer-complex-formation-of-some-metalloporphyrins-with-aromatic-solvents-further-theoretical-and-experimental-investigations
#15
Biswajit Roy, Mihir Ghosh, Prajna Mukherjee, Somnath Chowdhury, Bikash C Gupta, Koushik Majhi, Subrata Sinha
In our earlier work (Chem. Phys. Letts. 592 (2014) 149-154), a new broad band was observed in the near infrared region (700-900nm) of the steady state absorption spectra of some metalloporphyrins (zinc tetraphenylporphyrin, zinc octaethylporphyrin and magnesium octaethylporphyrin) in aromatic solvents (chlorobenzene, 1,2-dichlorobenzene, benzonitrile, benzene and toluene) at high concentrations (~10(-4)molL(-1)). The band was ascribed to be due to ground state charge transfer complexation between solute and solvent molecules...
July 19, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28738213/determinants-of-the-magnitude-of-socioeconomic-inequalities-in-mortality-a-study-of-17-european-countries
#16
Johan P Mackenbach, Matthias Bopp, Patrick Deboosere, Katalin Kovacs, Mall Leinsalu, Pekka Martikainen, Gwenn Menvielle, Enrique Regidor, Rianne de Gelder
The magnitude of socioeconomic inequalities in mortality differs importantly between countries, but these variations have not been satisfactorily explained. We explored the role of behavioral and structural determinants of these variations, by using a dataset covering 17 European countries in the period 1970-2010, and by conducting multilevel multivariate regression analyses. Our results suggest that between-country variations in inequalities in current mortality can partly be understood from variations in inequalities in smoking, excessive alcohol consumption, and poverty...
July 21, 2017: Health & Place
https://www.readbyqxmd.com/read/28738207/translocation-of-heavy-metals-from-soils-into-floral-organs-and-rewards-of-cucurbita-pepo-implications-for-plant-reproductive-fitness
#17
Erna Xun, Yanwen Zhang, Jimin Zhao, Jixun Guo
Metals and metalloids in soil could be transferred into reproductive organs and floral rewards of hyperaccumulator plants and influence their reproductive success, yet little is known whether non-hyperaccumulator plants can translocate heavy metals from soil into their floral organs and rewards (i.e., nectar and pollen) and, if so, whether plant reproduction will be affected. In our studies, summer squash (Cucurbita pepo L. cv. Golden Apple) was exposed to heavy-metal treatments during bud stage to investigate the translocation of soil-supplemented zinc, copper, nickel and lead into its floral organs (pistil, anther and nectary) and rewards (nectar and pollen) as well as floral metal accumulation effects on its reproduction...
July 21, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28738201/interbasin-water-transfer-for-the-rehabilitation-of-a-transboundary-mediterranean-stream-an-economic-analysis
#18
Ariel Akron, Andrea Ghermandi, Tamar Dayan, Yaron Hershkovitz
Global demand for freshwater is increasing as human population grows, climate changes and water resources are being overexploited. Consequently, many freshwater ecosystems, particularly in water-stressed regions, are severely degraded. Here we present a unique case of an Interbasin Water Transfer (IWT) project aiming at ecosystem rehabilitation and recreation enhancement of an intermittent transboundary stream (Ayun, Israel). For the past century, water diversion at the Lebanese side had led to flow secession in the Israeli Ayun Nature Reserve during the dry season (May-November)...
July 21, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28738194/characterization-and-horizontal-transfer-of-qach-associated-class-1-integrons-in-escherichia-coli-isolated-from-retail-meats
#19
Xiaobing Jiang, Yameng Xu, Yi Li, Kun Zhang, Lei Liu, Hailei Wang, Jinhe Tian, Hao Ying, Lei Shi, Tao Yu
The aim of this study was to examine the presence of genes responsible for resistance to quaternary ammonium compounds (QACs) and the association of qac genes with class 1 integrons in Escherichia coli isolated from retail meats. Among the 179 E. coli isolates tested, the minimum inhibitory concentrations (MICs) of benzalkonium chloride (BC) ranged from 4 to 64μg/mL. PCR assays indicated that QAC-resistance genes sugE(c), ydgE/ydgF, mdfA, emrE and qacEΔ1 were commonly present (40.2%-88.3%) in these isolates, but qacE, qacF, qacH and sugE(p) were less prevalent (2...
July 15, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28738153/electronic-coupling-for-donor-bridge-acceptor-systems-with-a-bridge-overlap-approach
#20
Alessandro Biancardi, Seth C Martin, Cameron Liss, Marco Caricato
Understanding the modulation of the electronic coupling in donor-acceptor systems connected through an aliphatic bridge is crucial from a fundamental point of view as well as for the development of organic electronics. In this work, we present a first-principles approach for the calculation of the electronic coupling (or transfer integrals) in such systems via a block-diagonalization of the Fock/Kohn-Sham matrix of the supersystem, followed by a projection on the basis of the fragment orbitals of the donor and acceptor groups...
July 24, 2017: Journal of Chemical Theory and Computation
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