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https://www.readbyqxmd.com/read/28231482/fourier-transform-infrared-and-raman-spectroscopy-in-the-study-of-phase-transitions-in-dipyrazolium-iodide-triiodide-experimental-and-theoretical-analysis
#1
M Węcławik, J Baran, P Durlak, Ł Marciniak, A Piecha-Bisiorek, R Jakubas
The paper presents the Infrared and Raman spectra of the powdered [C3N2H5(+)]2[I(-)∙I3(-)] crystal at the temperature intervals of 11-270K, covering two low-temperature phase transitions: discontinuous at 182/188K (cooling/heating) and continuous at 254K. The research shows that the vibrational states of the pyrazolium cations change significantly during discontinuous phase transition (III→II), while the continuous nature of successive structural transformation is more subtle and displays an insignificant change in the temperature coefficient of numerous vibrations during the II→I PT at 254K...
February 16, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28231479/intermittent-bilateral-coherence-in-physiological-and-essential-hand-tremor
#2
Soma Chakraborty, Jana Kopecká, Otakar Šprdlík, Martina Hoskovcová, Olga Ulmanová, Evžen Růžička, Martin Zapotocky
OBJECTIVE: To investigate the prevalence and the temporal structure of bilateral coherence in physiological (PT) and essential (ET) hand tremor. METHODS: Triaxial accelerometric recordings from both hands in 30 healthy subjects and 34 ET patients were analyzed using spectral coherence and wavelet coherence methods. In 12 additional healthy subjects, the relation between the hand tremor and the chest wall acceleration was evaluated using partial coherence analysis...
January 14, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28229646/special-nutrition-intervention-is-required-for-muscle-protective-efficacy-of-physical-exercise-in-elderly-people-at-highest-risk-of-sarcopenia
#3
A Molnár, I Jónásné Sztruhár, Á A Csontos, Cs Ferencz, Sz Várbíró, B Székács
Progressive loss of muscle mass and strength is a physiological consequence of aging, and without interventions, it usually deteriorates into sarcopenia. In this study, the hypothesis that combined special nutritional-physiotherapeutical intervention to prevent or reverse this biological deterioration in elderly people was tested. The effects of the regular resistance muscle training (PT, n = 17) alone and the combined exercise + special nutrition therapy containing whey protein and vitamin D (PT + NT, n = 17) were monitored for 3 months in 34 elderly patients (12 men and 22 women; mean age: 66...
September 2016: Physiol Int
https://www.readbyqxmd.com/read/28229597/molecular-seesaw-intricate-dynamics-and-versatile-chemistry-of-heteroaromatics-on-metal-surfaces
#4
Sergey N Filimonov, Wei Liu, Alexandre Tkatchenko
The design of novel elementary surface processes is important for applications in catalysis, single-molecule junctions, molecular sensors, switches and surface mounted molecular machines. Here we demonstrate by van der Waals inclusive density functional theory calculations that a small and relatively simple heteroaromatic compound s-triazine (C$_3$H$_3$N$_3$) unexpectedly possesses five metastable states when adsorbed on the Pt(111) surface. This diversity of the adsorption states stems from an interplay between versatile molecule/surface chemical bonding and van der Waals interactions and from ``softening'' of the aromatic ring by nitrogen substitution, which makes folding of the aromatic ring energetically much less demanding as compared to benzene...
February 23, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28229575/effects-of-a-low-volume-plyometric-training-in-anaerobic-performance-of-adolescent-athletes
#5
Ari R Assunção, Martim Bottaro, Euler A Cardoso, Daiane P Dantas da Silva, Marcelo Ferraz, Carlos A Vieira, Paulo Gentil
BACKGROUND: Parameters related to the anaerobic capacity and power may be important for the performance of many sports whose skills are related to high-intensity and short- duration efforts. Although plyometric training (PT) has been widely used in the regular strength and conditioning programs of young athletes, its effects on anaerobic performance are still controversial. Therefore, the purpose of the present study was to evaluate the effects of PT in anaerobic performance in young athletes...
February 22, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28229491/osnla1-a-ring-type-ubiquitin-ligase-maintains-phosphate-homeostasis-in-oryza-sativa-via-degradation-of-phosphate-transporters
#6
Wenhao Yue, Yinghui Ying, Chuang Wang, Yang Zhao, Changhe Dong, James Whelan, Huixia Shou
Inorganic phosphate (Pi) transporters (PTs) play vital roles in Pi uptake and translocation in plants. Under Pi sufficient conditions, PTs are degraded to prevent excess Pi accumulation. The mechanisms targeting PTs for degradation are not fully elucidated. In this study, we found that the Oryza sativa (rice) ortholog of Arabidopsis thaliana Nitrogen Limitation Adaptation (NLA), OsNLA1 protein, a RING-type E3 ubiquitin-ligase, was predominantly localized in the plasma membrane, and could interact with rice phosphate transporters OsPT2 and OsPT8...
February 23, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28229139/pti2-dach-the-iodido-analogue-of-oxaliplatin-as-a-candidate-for-colorectal-cancer-treatment-chemical-and-biological-features
#7
D Cirri, S Pillozzi, C Gabbiani, J Tricomi, G Bartoli, M Stefanini, E Michelucci, A Arcangeli, L Messori, T Marzo
Colorectal cancer (CRC) is a global health problem being the fourth most common cause of death due to cancer worldwide. Oxaliplatin plays a key role in current CRC treatment but shows serious drawbacks, such as a high systemic toxicity and the frequent insurgence of Pt resistance. In search of novel and more efficacious Pt-based drugs for CRC treatment, we synthesized and characterised PtI2(DACH), an oxaliplatin analogue. PtI2(DACH) was obtained through the replacement of bidentate oxalate with two iodides...
February 23, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28229136/pt-nanoparticles-immobilized-in-mesostructured-silica-a-non-leaching-catalyst-for-1-octene-hydrosilylation
#8
Thomas Galeandro-Diamant, Reine Sayah, Marie-Line Zanota, Sébastien Marrot, Laurent Veyre, Chloé Thieuleux, Valérie Meille
A catalyst containing small (ca. 2.5 nm) and crystalline Pt nanoparticles embedded into the walls of a mesostructured silica framework was found to be highly active in alkene hydrosilylation reaching TONs of ca. 10(5). More importantly, no Pt leaching was detected. This result is remarkable because Pt leaching is a recurrent problem in alkene hydrosilylation, which often prevents heterogeneous catalysts from being used industrially. This result is in contrast to the significant Pt leaching observed for other Pt/SiO2 catalysts...
February 23, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28228222/-surgical-treatment-and-prognosis-for-patients-with-%C3%A2-synchronous-multiple-primary-lung-adenocarcinomas
#9
Yue Peng, Hui Wang, Hounai Xie, Wangang Ren, Zhen Feng, Meng Li, Zhongmin Peng
BACKGROUND: With the popularization of high-resolution computed tomography (HRCT), there is a rising trend of the detection of multiple primary lung cancers (MPLC). Adenocarcinomas is the major pathological type of MPLC. At present, reports on MPLC are relatively common, but few study focused on synchronous multiple primary lung adenocarcinomas (SMPLA). We carried out this study in an attempt to enhance our understanding about SMPLA. METHODS: Data from 38 patients undergoing surgery for SMPLA in our institution frrom December 2012 and July 2016 were retrospectively collected...
February 20, 2017: Zhongguo Fei Ai za Zhi, Chinese Journal of Lung Cancer
https://www.readbyqxmd.com/read/28228004/self-rectifying-resistive-switching-memory-with-ultralow-switching-current-in-pt-ta2o5-hfo2-x-hf-stack
#10
Haili Ma, Jie Feng, Hangbing Lv, Tian Gao, Xiaoxin Xu, Qing Luo, Tiancheng Gong, Peng Yuan
In this study, we present a bilayer resistive switching memory device with Pt/Ta2O5/HfO2-x /Hf structure, which shows sub-1 μA ultralow operating current, median switching voltage, adequate ON/OFF ratio, and simultaneously containing excellent self-rectifying characteristics. The control sample with single HfO2-x structure shows bidirectional memory switching properties with symmetrical I-V curve in low resistance state. After introducing a 28-nm-thick Ta2O5 layer on HfO2-x layer, self-rectifying phenomena appeared, with a maximum self-rectifying ratio (RR) of ~4 × 10(3) observed at ±0...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28227465/reaction-mechanism-of-blood-coagulation-factors-in-shear-flow-field
#11
Koki Kawakami, Daisuke Sakota, Ryo Kosaka, Masahiro Nishida, Yasuo Kawaguchi, Osamu Maruyama, Koki Kawakami, Daisuke Sakota, Ryo Kosaka, Masahiro Nishida, Yasuo Kawaguchi, Osamu Maruyama, Masahiro Nishida, Koki Kawakami, Ryo Kosaka, Yasuo Kawaguchi, Osamu Maruyama, Daisuke Sakota
Thrombus formation in blood pumps is a major problem. It has been reported that the shear rate is closely related to thrombus formation in blood pumps; however, the mechanism of blood coagulation in a shear flow field is not yet fully understood. The purpose of this study is to evaluate the effect of shear loading on the reaction of blood coagulation factors quantitatively. Human blood and porcine blood were used as test blood and sheared at 2,880 s(-1) for 3 h using a rheometer. After shear loading to the test blood, the activated partial thromboplastin time (APTT) and prothrombin time (PT) of sample plasma were measured using an automated coagulation analyzer...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226902/investigation-on-the-hermeticity-of-an-implantable-package-with-32-feedthroughs-for-neural-prosthetic-applications
#12
Lorenzo Bisoni, Matthias Mueller, Paul Cvancara, Caterina Carboni, Roberto Puddu, Luigi Raffo, Massimo Barbaro, Thomas Stieglitz, Lorenzo Bisoni, Matthias Mueller, Paul Cvancara, Caterina Carboni, Roberto Puddu, Luigi Raffo, Massimo Barbaro, Thomas Stieglitz, Roberto Puddu, Luigi Raffo, Lorenzo Bisoni, Matthias Mueller, Paul Cvancara, Caterina Carboni, Massimo Barbaro, Thomas Stieglitz
This paper presents an implantable package aimed at hosting a bidirectional neural interface for neural prosthetic applications. The package has been conceived to minimize the invasivity for the patient, for this reason a cylindrical container with an outer diameter of 7 mm and a length of 21 mm has been designed. The package, realized in alumina (Al2O3), presents 32 hermetic feedthroughs located at the top and bottom base of the cylinder. The hermetic housing has been assembled using a low-temperature soldering method based on a previous platinum/gold (Pt/Au) metallization of the ceramic parts...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225354/electrospun-assembly-a-nondestructive-nanofabrication-for-transparent-photosensors
#13
Yuting Wang, Muhammad Shahid, Jing Cheng, Hiroki Nishijima, Wei Pan
Transparent electrodes based on a metal nanotrough network show superior electrical and optical properties. However, most metal networks fabricated by electrospinning are formed as film electrodes and hard to be patterned for the geometry shape of the device without any loss. Herein, we fabricate a high-transparent and flexible photodetector via a simple controlled electrospinning method. Owning to its trough- and belt-like geometry of Pt network electrodes, up to 83% transmittance can be obtained when the sheet resistances is 16Ω/sq, which may be the best performance for Pt-based transparent electrodes at present...
February 22, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28225278/electrochemical-stripping-of-atomic-oxygen-on-single-crystalline-platinum-bridging-gas-phase-and-electrochemical-oxidation
#14
Yi-Fan Huang, Marc T M Koper
In order to understand the interaction between Pt and surface oxygenated species in electrocatalysis, this paper correlates the electrochemistry of atomic oxygen on Pt formed in the gas phase with electrochemically generated oxygen species, on a variety of single-crystal platinum surfaces. The atomic oxygen adsorbed on single crystalline Pt electrodes, made by thermal dissociation of molecular oxygen, are used for voltammetry measurements in acidic electrolytes (HClO4 and H2SO4). The essential knowledge of coverage, binding energy and surface construction of atomic oxygen is correlated with the charge, potential and shape of voltammograms, respectively...
February 22, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28225131/modification-of-n-doped-tio2-photocatalysts-using-noble-metals-pt-pd-a-combined-xps-and-dft-study
#15
K Batalović, N Bundaleski, J Radaković, N Abazović, M Mitrić, R A Silva, M Savić, J Belošević-Čavor, Z Rakočević, C M Rangel
Nitrogen-doped TiO2 (N-TiO2) is considered as one of the most promising materials for various photocatalytic applications, while noble metals Pd and Pt are known as good catalysts for hydrogen evolution. This work focuses on the determination of structural and electronic modifications of N-TiO2, achieved by noble metal deposition at the surface, as a starting indicator for potential applications. We focus on the properties of easily synthesized nanocrystalline nitrogen-doped anatase TiO2, modified by depositing small amounts of Pd (0...
February 22, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28225121/the-local-electronic-properties-of-individual-pt-atoms-adsorbed-on-tio2-110-studied-by-kelvin-probe-force-microscopy-and-first-principles-simulations
#16
Ayhan Yurtsever, Delia Fernández-Torre, Jo Onoda, Masayuki Abe, Seizo Morita, Yoshiaki Sugimoto, Rubén Pérez
Noble metal nanostructures dispersed on metal oxide surfaces have applications in diverse areas such as catalysis, chemical sensing, and energy harvesting. Their reactivity, chemical selectivity, stability, and light absorption properties are controlled by the interactions at the metal/oxide interface. Single-atom metal adsorbates on the rutile TiO2(110)-(1 × 1) surface have become a paradigmatic model to characterize those interactions and to understand the unique electronic properties of these supported nanostructures...
February 22, 2017: Nanoscale
https://www.readbyqxmd.com/read/28225110/tuning-the-hydrogen-evolution-activity-of-%C3%AE-mo2c-nanoparticles-via-control-of-their-growth-conditions
#17
Timothy T Yang, Wissam A Saidi
The use of water electrocatalysis for hydrogen production is a promising, sustainable and greenhouse-gas-free process to develop disruptive renewable energy technologies. Transition metal carbides, in particular β-phase Mo2C, are garnering increased attention as hydrogen evolution reaction (HER) catalysts due to their favourable synthesis conditions, stability and high catalytic efficiency. We use a thermodynamic approach in conjunction with density functional theory and a kinetic model of exchange current density to systematically study the HER activity of β-Mo2C under different experimental conditions...
February 22, 2017: Nanoscale
https://www.readbyqxmd.com/read/28225095/high-index-hk0-faceted-platinum-concave-nanocubes-with-enhanced-peroxidase-like-activity-for-an-ultrasensitive-colorimetric-immunoassay-of-the-human-prostate-specific-antigen
#18
Zhuangqiang Gao, Shuzhen Lv, Mingdi Xu, Dianping Tang
Developing simple, high-efficiency non-enzyme bioassays is of great importance for modern analytical systems, but remains a significant challenge. One promising route is to utilize highly efficient nanocatalysts with the exposure of active crystal facets. Herein, we for the first time propose a novel colorimetric immunoassay for the ultrasensitive detection of the human prostate-specific antigen (PSA) based on using a unique type of nanolabel - high-index {hk0} faceted platinum concave nanocubes (HIF-Pt-CNCs)...
February 22, 2017: Analyst
https://www.readbyqxmd.com/read/28224766/thromboelastographic-evaluation-of-coagulation-in-patients-with-liver-disease
#19
Kyung Hwa Shin, In Suk Kim, Hyun Ji Lee, Hyung Hoi Kim, Chulhun L Chang, Young Mi Hong, Ki Tae Yoon, Mong Cho
BACKGROUND: The aims of this study were to investigate the parameters of thromboelastography (TEG) for evaluating coagulopathy and to reveal an association with disease severity and/or transfusion requirement in patients with chronic liver disease (CLD) in a clinical laboratory setting. METHODS: We enrolled two groups of adult patients with cirrhotic (N=123) and non-cirrhotic liver disease (N=52), as well as 84 healthy controls. Reaction time (R), kinetic time (K), α-angle (α), maximal amplitude (MA), and coagulation index (CI) were measured with kaolin-activated citrated blood with the TEG 5000 system (Haemonetics Corporation, USA)...
May 2017: Annals of Laboratory Medicine
https://www.readbyqxmd.com/read/28224358/synthesis-characterization-and-dna-binding-studies-of-hydroxyl-functionalized-platinum-ii-salphen-complexes
#20
Shahratul Ain Mohd Sukri, Lee Yook Heng, Nurul Huda Abd Karim
The platinum(II) salphen complex N,N'-Bis-4-(hydroxysalicylidene)-phenylenediamine-platinum(II); (1) and its two derivatives containing hydroxyl functionalized side chains N,N'-bis-[4-[[1-(2-hydroxyethoxy)] salicylidene] phenylenediamine-platinum(II); (2) and N,N'-bis-[4-[[1-(3-hydroxypropoxy)] salicylidene] phenylenediamine-platinum(II); (3) were synthesized and characterized. The structures of the complexes were confirmed by (1)H and (13)C NMR spectroscopy, FTIR, ESI-MS and CHN elemental analyses. The effects of the hydroxyl substituent on the spectral properties and the DNA binding behaviors of the Pt(II) complexes were explored...
February 21, 2017: Journal of Fluorescence
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