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https://www.readbyqxmd.com/read/29218987/simple-synthesis-of-au-pd-alloy-nanowire-networks-as-macroscopic-flexible-electrocatalysts-with-excellent-performance
#1
Jin Wang, Peina Zhang, Yujiao Xiahou, Dayang Wang, Haibing Xia, Helmuth Möhwald
The present work introduces a new way to prepare ultrathin Au-Pd alloy nanowire networks (NWNs) via deposition of Pd atoms onto in situ Au nanowires in reaction media at room temperature without aid of additional reducing agents. Thanks to their excellent colloidal stability in water as well as in ethanol, the resulting NWNs can be utilized to produce composite thin films with Nafion (perfluorinated sulfonic acid) with dimensions above dozens of square centimeters by means of solution casting on the glass substrate...
December 8, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29216050/spatial-intensity-profiling-of-elastic-and-inelastic-scattering-in-isotropic-and-anisotropic-liquids-by-immersion-of-a-spherical-silicon-photocell
#2
Muhammad Hamza Humayun, Syed Sultan Shah Bukhari, Muhammad Zakwan, Mustafa Mert Bayer, Ulaş Sabahattin Gökay, Ali Serpengüzel, Kenichi Taira, Etsuji Omura, Josuke Nakata
The transverse spatial intensity distribution of elastic and inelastic light scattering in passive and active as well as weak and strong scattering liquid media has been studied by using Sphelar One p-n junction silicon spherical photocells. We immersed a Sphelar One in these scattering solutions and measured the photoconductive response in reverse biased photodiode (PD) configuration. The passive weak scattering medium was pure ethanol (EtOH), whereas the passive strong scattering medium was 5CB nematic liquid crystal (NLC)...
December 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/29215677/diabetic-rats-present-high-mean-platelet-count-in-the-presence-of-oral-infections
#3
Luciana Louzada Ferreira, João Eduardo Gomes, Dóris Hissako Sumida, Suely Regina Mogami Bonfim, Gustavo Sivieri-Araújo, Gustav Guimarães, Luciano Tavares Angelo Cintra
Platelet count is associated with inflammatory diseases like diabetes mellitus (DM), which in turn, is related in a bidirectional manner with apical periodontitis and periodontal disease. The aim of this study was to evaluate the effects of apical periodontitis and/or periodontal disease on mean platelet count in a rat model of diabetes mellitus. Eighty Wistar rats were randomly divided into 8 groups (n=10): control (C), apical periodontitis (AP), periodontal disease (PD), apical periodontitis with periodontal disease (AP-PD), diabetes mellitus (DM), diabetes mellitus with apical periodontitis (DM-AP), diabetes mellitus with periodontal disease (DM-PD) and diabetes mellitus with apical periodontitis and periodontal disease (DM-AP-PD)...
September 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29214263/contacts-to-solution-synthesized-sns-nanoribbons-dependence-of-barrier-height-on-metal-work-function
#4
Jenifer R Hajzus, Adam J Biacchi, Son T Le, Curt A Richter, Angela R Hight Walker, Lisa M Porter
Tin(ii) monosulfide (SnS) is a layered, anisotropic material that is of interest as a two-dimensional semiconductor for opto-electronic, thermoelectric, and piezoelectric applications. In this study, the effect of work function on contact behavior was investigated. Ni/Au, Pd/Au, Cr/Au, and Ti/Au contacts were fabricated onto individual, solution-synthesized, p-type SnS nanoribbons. The lower work function metals (Cr and Ti) formed Schottky contacts, whereas the higher work function metals (Ni and Pd) formed ohmic or semi-ohmic contacts...
December 7, 2017: Nanoscale
https://www.readbyqxmd.com/read/29206708/use-of-a-telehealth-system-to-enhance-a-home-exercise-program-for-a-person-with-parkinson-disease-a-case-report
#5
Charlotte A Chatto, Paul T York, Catherine P Slade, Scott M Hasson
BACKGROUND AND PURPOSE: This case addresses feasibility of a home-based telehealth system to enhance home exercise program (HEP) adherence for a patient with Parkinson disease (PD). We describe START-System for Technology-Augmented Rehabilitation and Training-and discuss outcomes after integrating START into the HEP component of an established therapy protocol, Lee Silverman Voice Technique BIG (LSVT BIG). CASE DESCRIPTION: The participant was a 67-year-old woman with PD at Hoehn and Yahr Stage II...
December 1, 2017: Journal of Neurologic Physical Therapy: JNPT
https://www.readbyqxmd.com/read/29186492/mechanisms-of-acid-base-regulation-in-peritoneal-dialysis
#6
Amadou Sow, Johann Morelle, Nicolas Hautem, Carla Bettoni, Carsten A Wagner, Olivier Devuyst
Background: Peritoneal dialysis (PD) contributes to restore acid-base homeostasis in patients with end-stage renal disease. The transport pathways for buffers and carbon dioxide (CO2) across the peritoneal membrane remain poorly understood. Methods: Combining well-established PD protocols, whole-body plethysmography and renal function studies in mice, we investigated molecular mechanisms of acid-base regulation in PD, including the potential role of the water channel aquaporin-1 (AQP1)...
November 22, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29184136/branched-pd-rh-core-shell-nanocrystals-with-exposed-rh-100-facets-an-effective-electrocatalyst-for-hydrazine-electro-oxidation
#7
Guojing Wang, Shengchang Jing, Yiwei Tan
Shape control of noble metal (NM) nanocrystals (NCs) is of great importance for improving their electrocatalytic performance. In this report, branched Pd@Rh core@shell NCs that have right square prism-like arms with preferential exposure of Rh {100} facets (denoted as b-Pd@Rh-NCs thereafter) are synthesized and utilized as an electrocatalyst for the hydrazine electrooxidation (HEO) in acidic and alkaline electrolytes. The b-Pd@Rh-NCs are obtained by the heteroepitaxial growth of Rh on the pre-formed branched Pd NCs (denoted as b-Pd-NCs thereafter) core in the presence of poly(vinyl pyrrolidone) (PVP) and bromide ions...
November 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29182345/formation-of-micron-scale-metal-structures-on-glass-by-selective-electroless-plating-on-photopatterned-titanium-and-copper-containing-films
#8
Christopher E J Cordonier, Kyohei Okabe, Yoshio Horiuchi, Akimasa Nakamura, Kaoru Ishikawa, Shozo Seino, Shinsuke Takagi, Hideo Honma
A procedure for formation of catalytic SiO2 substrate adhesive layer patterns and selective electrochemical metal deposition on the catalyst images was investigated. A photoreactive solution containing a diazonaphthoquinone sulfonate ester and Ti and Cu complexes was developed to deposit Cu catalyst-TiO2 adhesive layer latent images on glass. Sub-micron/micron scale positive tone photoactive TiCu complex film patterns were formed using a conventional photolithography technique. The Cu ions in 40-50 nm thick Ti and Cu oxide layers formed by pyrolysis of the TiCu complex films were reduced, residual Cu displaced with Pd then the porous Ti oxide structure filled and plated with Cu by selective electroless then electrolytic plating...
November 28, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29181437/clinical-features-of-patients-treated-by-peritoneal-dialysis-for-over-a-decade
#9
Mengli Tong, Yuhui Wang, Jun Ni, Ning Weng, Chuanxia Chen, Hongyu Chen, Lindholm Bengt
BACKGROUND: Peritoneal dialysis (PD) is well-established as renal replacement therapy in end stage renal disease and has survival rates similar or better than hemodialysis (HD) for the initial years on dialysis therapy. However retention rate is lower due to higher technique failure rates than in HD and few patients stay on PD for more than 10 years (PD>10 yrs). Here we investigated clinical features characterizing PD>10 yrs patients. PATIENTS AND METHODS: In a single center study of 450 prevalent PD patients, 35 PD>10 yrs patients (n=35) were compared with patients (n=415) who had been on PD for shorter periods of time in terms of clinical characteristics...
2017: American Journal of Clinical and Experimental Urology
https://www.readbyqxmd.com/read/29179441/high-affinity-human-pd-l1-variants-attenuate-the-suppression-of-t-cell-activation
#10
Zhaoduan Liang, Ye Tian, Wenxuan Cai, Zhiming Weng, Yanyan Li, Huanling Zhang, Yifeng Bao, Yi Li
The activated T cells can be suppressed by programed death-1 (PD-1) axis through low affinity interaction between PD-1 and PD-ligand 1 (PD-L1) in solution or on antigen presenting cells. In clinic, the concentration of soluble PD-L1 in peripheral blood negatively correlates with cancer prognosis. However, there is little information about the relation between the affinity of PD-1/PD-L1 interaction and the suppressive capacity of PD-1 axis. In this study, we analyzed inhibitory roles of high affinity soluble human PD-L1 (hPD-L1) variants, which were generated with directed molecular evolution...
October 24, 2017: Oncotarget
https://www.readbyqxmd.com/read/29175960/silver-palladium-catalysts-for-the-direct-synthesis-of-hydrogen-peroxide
#11
Zainab Khan, Nicholas F Dummer, Jennifer K Edwards
A series of bimetallic silver-palladium catalysts supported on titania were prepared by wet impregnation and assessed for the direct synthesis of hydrogen peroxide, and its subsequent side reactions. The addition of silver to a palladium catalyst was found to significantly decrease hydrogen peroxide productivity and hydrogenation, but crucially increase the rate of decomposition. The decomposition product, which is predominantly hydroxyl radicals, can be used to decrease bacterial colonies. The interaction between silver and palladium was characterized using scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy (XPS) and temperature programmed reduction (TPR)...
January 13, 2018: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/29172489/ligand-directed-reactivity-in-dioxygen-and-water-binding-to-cis-pd-nhc-2-%C3%AE-2-o2
#12
Taryn D Palluccio, Xiaochen Cai, Subhojit Majumdar, Leonardo F Serafim, Neil C Tomson, Karl Wieghardt, Catherine S J Cazin, Steven P Nolan, Elena V Rybak-Akimova, Miguel Angel Fernández-González, Manuel Temprado, Burjor Captain, Carl D Hoff
Reaction of [Pd(IPr)2] (IPr = 1,3-bis-(2,6-diisopropylphenyl)imidazol-2-ylidene) and O2 leads to the surprising discovery that at low temperature the initial reaction product is a highly labile peroxide complex cis-[Pd(IPr)2(η2-O2)]. At temperatures of above ≈-40°C, cis-[Pd(IPr)2(η2-O2)] adds a second O2 to form trans-[Pd(IPr)2(η1-O2)2]. Squid magnetometry and EPR studies yield data that are consistent with a singlet diradical ground state with a thermally accessible triplet state for this unique bis-superoxide complex...
November 27, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29172435/the-evolution-of-chemical-high-throughput-experimentation-to-address-challenging-problems-in-pharmaceutical-synthesis
#13
Shane W Krska, Daniel A DiRocco, Spencer D Dreher, Michael Shevlin
The structural complexity of pharmaceuticals presents a significant challenge to modern catalysis. Many published methods that work well on simple substrates often fail when attempts are made to apply them to complex drug intermediates. The use of high-throughput experimentation (HTE) techniques offers a means to overcome this fundamental challenge by facilitating the rational exploration of large arrays of catalysts and reaction conditions in a time- and material-efficient manner. Initial forays into the use of HTE in our laboratories for solving chemistry problems centered around screening of chiral precious-metal catalysts for homogeneous asymmetric hydrogenation...
November 27, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29165500/uv-vis-spectrophotometry-of-quinone-flow-battery-electrolyte-for-in-situ-monitoring-and-improved-electrochemical-modeling-of-potential-and-quinhydrone-formation
#14
Liuchuan Tong, Qing Chen, Andrew A Wong, Rafael Gómez-Bombarelli, Alán Aspuru-Guzik, Roy G Gordon, Michael J Aziz
Quinone-based aqueous flow batteries provide a potential opportunity for large-scale, low-cost energy storage due to their composition from earth abundant elements, high aqueous solubility, reversible redox kinetics and their chemical tunability such as reduction potential. In an operating flow battery utilizing 9,10-anthraquinone-2,7-disulfonic acid, the aggregation of an oxidized quinone and a reduced hydroquinone to form a quinhydrone dimer causes significant variations from ideal solution behavior and of optical absorption from the Beer-Lambert law...
November 22, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29163923/size-and-charge-effect-of-guest-cations-in-the-formation-of-polyoxopalladates-a-theoretical-and-experimental-study
#15
Zhongling Lang, Peng Yang, Zhengguo Lin, Likai Yan, Ming-Xing Li, Jorge J Carbó, Ulrich Kortz, Josep M Poblet
The development of rational synthetic procedures with desired nuclearity and high selectivity is a critical issue in inorganic chemistry. Here we demonstrate a comprehensive understanding of the template effect induced by metal cations in the formation mechanism of the class of polyoxopalladates ({MPd12L8} nanocube and {MPd15L10} nanostar) by combining computational and experimental techniques. The capture of a M (n+) guest ion by a peripheral palladium(ii)-oxo shell leads to a competition between the parent Pd(2+) addenda ion and the respective guest metal ion...
November 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/29162678/stability-of-ceftazidime-and-heparin-in-four-different-types-of-peritoneal-dialysis-solutions
#16
Surendra Kandel, Syed Tabish R Zaidi, Troy Wanandy, Long Ming, Ronald Castelino, Kamal Sud, Rahul P Patel
BACKGROUND: Intraperitoneal (IP) administration of ceftazidime is recommended for the treatment of peritoneal dialysis-associated peritonitis (PDAP) from Pseudomonas. Patients with PDAP may also need IP heparin to overcome problems with drainage of turbid peritoneal dialysis (PD) fluids and blockage of catheters with fibrin. Physico-chemical stability of ceftazidime and heparin, and biological stability of heparin in many types of PD solutions is unknown. Therefore, we investigated the stability of ceftazidime and heparin in 4 types of PD solutions...
November 21, 2017: Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
https://www.readbyqxmd.com/read/29158495/the-prevalence-of-muscle-wasting-sarcopenia-in-peritoneal-dialysis-patients-varies-with-ethnicity-due-to-differences-in-muscle-mass-measured-by-bioimpedance
#17
Suree Yoowannakul, Kamonwan Tangvoraphonkchai, Andrew Davenport
BACKGROUND/OBJECTIVES: Sarcopenia is associated with increased mortality. European and North American recommended screening for low muscle mass uses gender specific cut points, with no adjustment for ethnicity. We wished to determine whether the prevalence of sarcopenia was altered by ethnicity in peritoneal dialysis (PD) patients. SUBJECTS/METHODS: We measured appendicular lean mass indexed to height (ALMI) in PD patients by segmental bioimpedance and determined sarcopenia using different cut off points for reduced muscle mass...
November 21, 2017: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29155572/boosting-hot-electrons-in-hetero-superstructures-for-plasmon-enhanced-catalysis
#18
Jun Guo, Yin Zhang, Lin Shi, Yanfei Zhu, Megersa Feyissa Mideksa, Ke Hou, Wenshi Zhao, Dawei Wang, Meiting Zhao, Xiaofei Zhang, Jiawei Lv, Jianqi Zhang, Xiaoli Wang, Zhiyong Tang
Hetero-nanostructures featured with both strong plasmon absorption and high catalytic activity are believed to be ideal platforms to realize efficient light-driven catalysis. However, in reality it remains great challenge to acquire high performance catalysis in such hetero-nanostructures due to poor generation and transfer of plamson-induced hot electrons. In this report, we demonstrate that Au nanorod@Pd superstructures (Au@Pd SSs), where the ordered Pd nanoarrays are precisely grown on Au nanorod surfaces via solution-based seed-mediated approach, would be an excellent solution for this challenge...
November 20, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29155495/addressing-the-burden-of-dialysis-around-the-world-a-summary-of-the-roundtable-discussion-on-dialysis-economics-at-the-first-international-congress-of-chinese-nephrologists-2015
#19
REVIEW
Philip Kam-Tao Li, Sing Leung Lui, Jack Kit-Chung Ng, Guan Yan Cai, Christopher T Chan, Hung Chun Chen, Alfred K Cheung, Koon Shing Choi, Hui Lin Choong, Stanley L Fan, Loke Meng Ong, Linda Wai Ling Yu, Xue Qing Yu
To address the issue of heavy dialysis burden due to the rising prevalence of end-stage renal disease around the world, a roundtable discussion on the sustainability of managing dialysis burden around the world was held in Hong Kong during the First International Congress of Chinese Nephrologists in December 2015. The roundtable discussion was attended by experts from Hong Kong, China, Canada, England, Malaysia, Singapore, Taiwan and United States. Potential solutions to cope with the heavy burden on dialysis include the prevention and retardation of the progression of CKD; wider use of home-based dialysis therapy, particularly PD; promotion of kidney transplantation; and the use of renal palliative care service...
December 2017: Nephrology
https://www.readbyqxmd.com/read/29151492/determinants-of-the-change-in-arterial-stiffness-in-peritoneal-dialysis-patients
#20
Mitsutaka Nakahigashi, Hiroyasu Tsukaguchi, Satoshi Morimoto, Chikara Nakano, Hiroko Ueda, Kazunori Someya, Makiko Kusabe, Sanae Kikuchi, Takanobu Imada, Ichiro Shiojima
Arterial stiffness is an important risk factor for cardiovascular disease (CVD) in patients with end-stage renal failure. However, little is known about the factors that contribute to arterial rigidity in peritoneal dialysis (PD) patients. The aim of this study was to define the pattern and determinants of the longitudinal change in arterial stiffness after PD initiation.Arterial stiffening was estimated for 46 PD patients by using brachial-ankle pulse wave velocity (baPWV) and carotid intima-media thickness (cIMT)...
November 17, 2017: International Heart Journal
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