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https://www.readbyqxmd.com/read/28813887/the-effects-of-age-and-amplitude-on-wrist-proprioceptive-acuity
#1
Francesca Marini, Charmayne M L Hughes, Pietro Morasso, Lorenzo Masia
This study examined wrist proprioception in a cross-sectional sample of 44 children aged between 8-to 14-years and a control group of 10 neurologically and physically healthy adults. Using a 3-degrees of freedom robotic device, participants performed an ipsilateral joint position matching task in which target amplitude (40% or 80% functional range of motion [fRoM]) and degrees-of-freedom (Flexion/Extension [FE], Radial/Ulnar deviation [RUD], Pronation/Supination [PS]) were manipulated. Results indicated that proprioceptive function became more accurate and consistent over the developmental spectrum, but that the ability to utilize proprioceptive feedback did not reach adult levels till the age of 10-11 years...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28812901/behavior-of-methylammonium-dipoles-in-mapbx3-x-br-and-i
#2
Sharada Govinda, Bhushan P Kore, Menno Bokdam, Pratibha Mahale, Abhinav Kumar, Somnath Pal, Biswajit Bhattacharyya, Jonathan Lahnsteiner, Georg Kresse, Cesare Franchini, Anshu Pandey, D D Sarma
Dielectric constants of MAPbX3 (X = Br, I) in 1 kHz-1 MHz range show strong temperature dependencies near the room temperature in contrast to the nearly temperature independent dielectric constant of CsPbBr3. This strong temperature dependence for MAPbX3 in the tetragonal phase is attributed to the MA(+) dipoles rotating freely within the probing time scale. This interpretation is supported by ab initio molecular dynamics simulations on MAPbI3 that establish these dipoles as randomly oriented with a rotational relaxation time scale of ~7 ps at 300 K...
August 16, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28812355/adaptively-recognizing-parallel-stranded-duplex-structure-for-fluorescent-dna-polarity-analysis
#3
Mei-Yun Ye, Rui-Tao Zhu, Xiang Li, Xiao-Shun Zhou, Zheng-Zhi Yin, Qian Li, Yong Shao
Besides the canonical Watson-Crick (WC) linked antiparallel-stranded duplex (aps-DNA), DNA is also able to form bioactive parallel-stranded duplex (ps-DNA) with the two involving strands adopting the equal 5'-3' polarity. Discriminating ps-DNA from aps-DNA with an ideal selectivity is more challenging because of their comparable duplex topologies. Herein, we designed a unique probe of HPIN to fluorescently recognize ps-DNA but to keep an almost nonfluorescent response in binding with aps-DNA. The success of the Hoogsteen hydrogen bonding pattern in lighting up the HPIN fluorescence over the reverse Watson-Crick (rWC) one suggests the critical role of HPIN in structurally adaptive recognition to the strand polarity-determined base-pairing peculiarity...
August 16, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28812317/seven-dangerous-ps-of-pregnancy-and-challenges-of-caring-for-pregnant-women-with-complex-needs
#4
Ganesh Acharya
No abstract text is available yet for this article.
September 2017: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/28812284/new-nanocomposites-of-polystyrene-with-polyaniline-doped-with-lauryl-sulfuric-acid
#5
A A Pud, O A Nikolayeva, L O Vretik, Yu V Noskov, N A Ogurtsov, O S Kruglyak, E A Fedorenko
This work is concentrated on synthesis and investigation of new core-shell nanocomposites of polystyrene (PS) with doped polyaniline (PANI). The latex containing PS nanoparticles with sizes of 15-30 nm was prepared by microemulsion polymerization of styrene in water media. The PS/PANI nanocomposites were synthesized by chemical oxidative polymerization of aniline in the PS latex media in a presence of lauryl sulfuric acid (LSA), which served as both dopant and plasticizer. The real content of PANI in the synthesized nanocomposites was determined by UV-Vis spectroscopy method...
August 15, 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28812244/fabrication-of-ordered-nanopattern-by-using-abc-triblock-copolymer-with-salt-in-toluene
#6
Hailiang Huang, Benbin Zhong, Xihong Zu, Hongsheng Luo, Wenjing Lin, Minghai Zhang, Yazhou Zhong, Guobin Yi
Ordered nanopatterns of triblock copolymer polystyrene-block-poly(2-vinylpyridine)-block- poly (ethylene oxide)(PS-b-P2VP-b-PEO) have been achieved by the addition of lithium chloride (LiCl). The morphological and structural evolution of PS-b-P2VP-b-PEO/LiCl thin films were systematically investigated by varying different experimental parameters, including the treatment for polymer solution after the addition of LiCl, the time scale of ultrasonic treatment and the molar ratio of Li(+) ions to the total number of oxygen atoms (O) in PEO block and the nitrogen atoms (N) in P2VP block...
August 15, 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28811782/clinical-effects-of-pulmonary-surfactant-in-combination-with-nasal-continuous-positive-airway-pressure-therapy-on-neonatal-respiratory-distress-syndrome
#7
Congmin Zhang, Xiaojing Zhu
OBJECTIVE: To analyze the therapeutic effect of pulmonary surfactant (PS) in combination with nasal continuous positive airway pressure (NCPAP) therapy on neonatal respiratory distress syndrome (NRDS). METHODOLOGY: Forty-nine neonates who were diagnosed as NRDS and admitted in our hospital from May 2014 to June 2015 were selected and divided into an observation group and a control group. The observation group was treated with PS and NCPAP. The control group was treated only with NCPAP...
May 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/28811322/analysis-of-sphingolipids-sterols-and-phospholipids-in-human-pathogenic-cryptococcus-strains
#8
Ashutosh Singh, Andrew MacKenzie, Geoffrey Girnun, Maurizio Del Poeta
Cryptococcus species cause invasive infections in humans. Lipids play an important role in the progression of these infections. Independent studies done by our group and others provide some detail about the functions of these lipids in Cryptococcus infections. However, pathways of biosynthesis and metabolism of these lipids are not completely understood. To thoroughly understand the physiological role of these Cryptococcus lipids, a proper structure and composition analyses of Cryptococcus lipids is demanded...
August 15, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28810402/physical-activity-intensity-and-subjective-well-being-in-healthy-adults
#9
Gregory A Panza, Beth A Taylor, Paul D Thompson, C Michael White, Linda S Pescatello
The effect of physical activity intensity on subjective well-being has not been well established. We examined this relationship among 419 healthy adults using objective and subjective physical activity measurements (sample size varied among well-being assessments). For accelerometers, light-intensity physical activity positively associated with psychological well-being ( n = 150) and negatively associated with depression ( n = 99); moderate intensity negatively associated with pain severity ( n = 419) and positively associated with psychological well-being; sedentary behavior negatively associated with psychological well-being and positively associated with depression ( ps < ...
February 1, 2017: Journal of Health Psychology
https://www.readbyqxmd.com/read/28810228/evolution-of-molecular-weight-and-fluorescence-of-effluent-organic-matter-efom-during-oxidation-processes-revealed-by-advanced-spectrographic-and-chromatographic-tools
#10
Zhiqiang Chen, Mo Li, Qinxue Wen, Nanqi Ren
Effluent organic matter (EfOM) is an emerging concern to receiving aquatic environment due to its refractory property. The degradation of EfOM in ozonation and other two advanced oxidation processes (AOPs), UV/H2O2 and UV/persulfate (PS), was investigated in this study. Fluorescence spectra coupled with parallel factor analysis (PARAFAC) and two-dimensional correlation gel permeation chromatography (2D-GPC) were used to track the evolution of EfOM during each oxidation process. Results showed that the degradation of EfOM indicated by dissolved organic carbon (DOC), UV254 and fluorescence components, fitted well with pseudo-first-order kinetic model during the oxidation processes...
August 4, 2017: Water Research
https://www.readbyqxmd.com/read/28809934/long-term-exposure-to-air-pollution-and-the-incidence-of-parkinson-s-disease-a-nested-case-control-study
#11
Chiu-Ying Chen, Hui-Jung Hung, Kuang-Hsi Chang, Chung Y Hsu, Chih-Hsin Muo, Chon-Haw Tsai, Trong-Neng Wu
BACKGROUND: Previous studies revealed that chronic exposure to air pollution can significantly increase the risk of the development of Parkinson's disease (PD), but this relationship is inconclusive as large-scale prospective studies are limited and the results are inconsistent. Therefore, the purpose of this study was to ascertain the adverse health effects of air pollution exposure in a nationwide population using a longitudinal approach. MATERIALS AND METHODS: We conducted a nested case-control study using the National Health Insurance Research Dataset (NHIRD), which consisted of 1,000,000 beneficiaries in the National Health Insurance Program (NHI) in the year 2000 and their medical records from 1995 to 2013 and using public data on air pollution concentrations from monitoring stations across Taiwan released from the Environmental Protection Administration to identify people with ages ≥ 40 years living in areas with monitoring stations during 1995-1999 as study subjects...
2017: PloS One
https://www.readbyqxmd.com/read/28809537/confined-water-structure-dynamics-and-thermodynamics
#12
Sudip Chakraborty, Hemant Kumar, Chandan Dasgupta, Prabal K Maiti
Understanding the properties of strongly confined water is important for a variety of applications such as fast flow and desalination devices, voltage generation, flow sensing, and nanofluidics. Confined water also plays an important role in many biological processes such as flow through ion channels. Water in the bulk exhibits many unusual properties that arise primarily from the presence of a network of hydrogen bonds. Strong confinement in structures such as carbon nanotubes (CNTs) substantially modifies the structural, thermodynamic, and dynamic (both translational and orientational) properties of water by changing the structure of the hydrogen bond network...
August 15, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28809474/a-nano-in-nano-approach-for-enzyme-immobilization-based-on-block-copolymers
#13
Finizia Auriemma, Claudio De Rosa, Anna Malafronte, Rocco Di Girolamo, Chiara Santillo, Yuri Gerelli, Giovanna Fragneto, Robert David Barker, Vincenzo Pavone, Ornella Maglio, Angela Lombardi
We have set-up a facile approach for fabrication of supports with tailored nanoporosity for immobilization of enzymes. To this aim block copolymers self-assembly has been used to prepare nanostructured thin films with well-defined architecture containing pores of tailorable size delimited by walls with tailorable degree of hydrophilicity. In particular, we have employed a mixture of polystyrene-block-poly(L-lactide) (PS-PLLA) and polystyrene-block-poly(ethylene oxide) (PS-PEO) diblock copolymers to generate thin films with a lamellar morphology consisting of PS lamellar do-mains alternating with mixed PEO/PLLA blocks lamellar domains...
August 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28808836/excitation-transfer-and-trapping-kinetics-in-plant-photosystem-i-probed-by-two-dimensional-electronic-spectroscopy
#14
Parveen Akhtar, Cheng Zhang, Zhengtang Liu, Howe-Siang Tan, Petar H Lambrev
Photosystem I is a robust and highly efficient biological solar engine. Its capacity to utilize virtually every absorbed photon's energy in a photochemical reaction generates great interest in the kinetics and mechanisms of excitation energy transfer and charge separation. In this work, we have employed room-temperature coherent two-dimensional electronic spectroscopy and time-resolved fluorescence spectroscopy to follow exciton equilibration and excitation trapping in intact Photosystem I complexes as well as core complexes isolated from Pisum sativum...
August 14, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/28807397/colorectal-endometriosis-associated-infertility-should-surgery-precede-art
#15
Sofiane Bendifallah, Horace Roman, Emmanuelle Mathieu d'Argent, Salma Touleimat, Jonathan Cohen, Emile Darai, Marcos Ballester
OBJECTIVE: To compare the impact of first-line assisted reproductive technology (ART; intracytoplasmic sperm injection [ICSI]-IVF) and first-line colorectal surgery followed by ART on fertility outcomes in women with colorectal endometriosis-associated infertility. DESIGN: Retrospective matched cohort study using propensity score (PS) matching (PSM) analysis. SETTING: University referral centers. PATIENT(S): A total of 110 women were analyzed from January 2005 to June 2014...
August 11, 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28806683/asymmetric-polyplex-nanocapsules-loaded-with-photosentisizer-for-light-assisted-gene-transfer
#16
Xuemin Lu, Li Liu
Inefficient intracellular gene delivery is still a limitation for the clinical translation of gene therapy. Recently, photochemical internalization (PCI) has emerged with the opportunity to overcome endo-lysosomal sequestration in gene delivery, which utilizes photosensitizer (PS) plus light generating reactive oxygen species (ROS) at sub-lethal level to facilitate intracellularly targeted drug delivery. In this work, asymmetric polyplex-nanocapsules were prepared based on the triblock copolymers of PEG-PCL-PEI by using the simple solvent-injection method...
August 7, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28806084/photochemical-activation-of-tertiary-amines-for-applications-in-studying-cell-physiology
#17
Naeem Asad, Davide Deodato, Xin Lan, Magnus B Widegren, David Lee Phillips, Lili Du, Timothy M Dore
Representative tertiary amines were linked to the 8-cyano-7-hydroxyquinolinyl (CyHQ) photoremovable protecting group (PPG) to create photoactivatable forms suitable for use in studying cell physiology. The photoactivation of tamoxifen and 4-hydroxytamoxifen, which can be used to activate Cre recombinase and CRISPR-Cas9 gene editing, demonstrated that highly efficient release of bioactive molecules could be achieved through 1- and 2-photon excitation (1PE and 2PE). CyHQ-protected anilines underwent a photo-aza-Claisen rearrangement instead of releasing amines...
August 14, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28805408/age-of-initiation-and-substance-use-progression-a-multivariate-latent-growth-analysis
#18
Leah S Richmond-Rakerd, Wendy S Slutske, Phillip K Wood
An individual's age at first substance use may be associated with their risk for progression toward heavier substance involvement. To our knowledge, however, no studies within nationally representative samples have examined the relation between the timing of initiation and progression in use of multiple substances. The present study employed a sample of 9,421 participants from the National Longitudinal Study of Adolescent to Adult Health who reported on their ages of tobacco, alcohol, and cannabis initiation; frequency of tobacco, alcohol, and cannabis use; and quantity of tobacco and alcohol use across 4 waves...
August 14, 2017: Psychology of Addictive Behaviors: Journal of the Society of Psychologists in Addictive Behaviors
https://www.readbyqxmd.com/read/28805377/intrinsic-dynamics-of-binding-rail-and-its-allosteric-effect-in-the-class-i-hdacs
#19
Jingwei Zhou, Yue Huang, Chunyan Cheng, Kai Wang, Ruibo Wu
The development of novel isoform/class-selective inhibitor is still of great biological and medical significance to conquer the continuously reported side effects for the histone deacetylases (HDACs) drugs. The first potent HDAC allosteric inhibitor was discovered last year and this allosteric inhibitor design is thought to be a promising strategy to overcome the current challenges in HDAC inhibitor design. However, the detailed allosteric mechanisms and its remote regulation effects on the catalytic/inhibitor activity of HDAC are still unclear...
August 14, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28805294/microplastics-alter-composition-of-fungal-communities-in-aquatic-ecosystems
#20
Marie Therese Kettner, Keilor Rojas-Jimenez, Sonja Oberbeckmann, Matthias Labrenz, Hans-Peter Grossart
Despite increasing concerns about microplastic (MP) pollution in aquatic ecosystems, there is insufficient knowledge on how MP affect fungal communities. In this study, we explored the diversity and community composition of fungi attached to polyethylene (PE) and polystyrene (PS) particles incubated in different aquatic systems in north-east Germany: the Baltic Sea, the River Warnow and a wastewater treatment plant. Based on next generation 18S rRNA gene sequencing, 347 different operational taxonomic units assigned to 81 fungal taxa were identified on PE and PS...
August 14, 2017: Environmental Microbiology
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