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https://www.readbyqxmd.com/read/28213150/preparation-of-the-go-pd-nanocomposite-and-its-application-for-the-degradation-of-organic-dyes-in-water
#1
Afshan Omidvar, Babak Jaleh, Mahmoud Nasrollahzadeh
A GO/Pd nanocomposite has been successfully synthesized applying a simple method via immobilizing Pd on the surface of the graphene oxide (GO). The GO/Pd nanocomposite was characterized by X-ray diffraction (XRD), Fourier transformed infrared (FT-IR) spectroscopy, Raman, transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) techniques. The surface morphology of Pd NPs was viewed by TEM, the particles are spherical with an average particle size of 11nm...
February 9, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28212832/motor-dysfunction-and-alterations-in-glutathione-concentration-cholinesterase-activity-and-bdnf-expression-in-substantia-nigra-pars-compacta-in-rats-with-pedunculopontine-lesion
#2
Lisette Blanco-Lezcano, Javier Jimenez-Martin, Mei-Li Díaz-Hung, Esteban Alberti-Amador, Maylin Wong-Guerra, Ma Elena González-Fraguela, Bárbara Estupiñán-Díaz, Teresa Serrano-Sánchez, Liliana Francis-Turner, Susana Delgado-Ocaña, Yanier Núñez-Figueredo, Yamilé Vega-Hurtado, Isabel Fernández-Jiménez
Pedunculopontine nucleus (PPN) has been considered a critically important region in the regulation of some of the physiological functions that fail during the progression of Parkinson's disease (PD). In this paper, the effects of unilateral neurotoxic lesion of the PPN [through the injection of N-methyl-d-aspartate (NMDA) solution (concentration: 0.1M; volume: 0.5µL)] in motor execution and gait disorders and the changes in cellular and molecular indicators in rat nigral tissue were evaluated. The motor execution was assessed using the beam test (BT) and the gait disorders by footprint test...
February 15, 2017: Neuroscience
https://www.readbyqxmd.com/read/28206751/ultratrace-naked-eye-colorimetric-detection-of-hg-2-in-wastewater-and-serum-utilizing-mercury-stimulated-peroxidase-mimetic-activity-of-reduced-graphene-oxide-pei-pd-nanohybrids
#3
Shouting Zhang, Dongxu Zhang, Xuehong Zhang, Denghui Shang, Zhonghua Xue, Duoliang Shan, Xiao-Quan Lu
Herein, we developed a general strategy for rapid, high selectively and ultratrace naked-eye colorimetric detection of Hg(2+) in aqueous solutions. Two dimensional rGO/PEI/Pd nanohybrids, where rGO, PEI and Pd were referred to reduced graphene oxide, polyethyleneimine, and Pd nanoparticles, respectively, were synthesized and used as mimetic peroxidase for selective and ultrasensitive detection of Hg(2+) in water and human serum samples. In the presence of mercury ions, the peroxidase mimetic activity of rGO/PEI/Pd nanohybrids was found to be stimulated and enhanced significantly, which promoted the effective oxidation and color change of 3, 3', 5, 5'-tetramethylbenzidine in solution to dark blue that was detected by naked-eyes and absorption spectroscopic method...
February 16, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28198611/pdcu-pd-nanocube-with-pt-like-activity-for-hydrogen-evolution-reaction
#4
Jing Li, Feng Li, Si-Xuan Guo, Jie Zhang, Jiantai Ma
The electronic properties of metal surfaces can be modulated to weaken the binding energy of adsorbed H-intermediates on the catalyst surface thus enhance the catalytic activity for the hydrogen evolution reaction (HER). Here we firstly prepare PdCu alloy nanocubes (NCs) by co-reduction of Cu(acac)2 (acac =acetylacetonate) and Na2PdCl4 in the presence of oleylamine (OAm) and trioctylphosphine (TOP). The PdCu NC coated glassy carbon electrode is then anodized at a constant potential of 0.51 V vs. Ag/AgCl at room temperature in 0...
February 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28197142/home-made-cost-effective-preservation-buffer-is-a-better-alternative-to-commercial-preservation-methods-for-microbiome-research
#5
Sebastian Menke, Mark A F Gillingham, Kerstin Wilhelm, Simone Sommer
The investigation of wildlife gastrointestinal microbiomes by next-generation sequencing approaches is a growing field in microbial ecology and conservation. Such studies often face difficulties in sample preservation if neither freezing facilities nor liquid nitrogen (LQN) are readily available. Thus, in order to prevent microbial community changes because of bacterial growth after sampling, preservation buffers need to be applied to samples. However, the amount of microbial community variation attributable to the different preservation treatments and potentially affecting biological interpretation is hardly known...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28193826/the-nlrp3-inflammasome-has-a-critical-role-in-peritoneal-dialysis-related-peritonitis
#6
Nicolas Hautem, Johann Morelle, Amadou Sow, Cyril Corbet, Olivier Feron, Eric Goffin, François Huaux, Olivier Devuyst
Bacterial peritonitis remains the main cause of technique failure in peritoneal dialysis (PD). During peritonitis, the peritoneal membrane undergoes structural and functional alterations that are mediated by IL-1β The NLRP3 inflammasome is a caspase-1-activating multiprotein complex that links sensing of microbial and stress products to activation of proinflammatory cytokines, including IL-1β The potential roles of the NLRP3 inflammasome and IL-1β in the peritoneal membrane during acute peritonitis have not been investigated...
February 13, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28193502/development-of-a-preclinical-211-rn-211-at-generator-system-for-targeted-alpha-therapy-research-with-211-at
#7
Jason R Crawford, Hua Yang, Peter Kunz, D Scott Wilbur, Paul Schaffer, Thomas J Ruth
INTRODUCTION: The availability of (211)At for targeted alpha therapy research can be increased by the (211)Rn/(211)At generator system, whereby (211)At is produced by (211)Rn electron capture decay. This study demonstrated the feasibility of using generator-produced (211)At to label monoclonal antibody (BC8, anti-human CD45) for preclinical use, following isolation from the (207)Po contamination also produced by these generators (by (211)Rn α-decay). METHODS: (211)Rn was produced by (211)Fr electron capture decay following mass separated ion beam implantation and chemically isolated in liquid alkane hydrocarbon (dodecane)...
January 29, 2017: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/28192996/palladium-electrodeposition-onto-pt-100-two-layers-underpotential-deposition
#8
Bruno A F Previdello, Eric Sibert, Mireille Maret, Yvonne Soldo-Olivier
Electrodeposition of first Pd layers onto Pt(100) was investigated using cyclic voltammetry at low scan rate (0.1 mV.s-1). Ultra-thin films were characterized by cyclic voltammetry in 0.1M H2SO4 solution and with ex situ AFM (Atomic Force Microscopy). For the first time, we evidenced the underpotential character of the two first Pd layers deposition, characterized by a two steps mechanism, each step corresponding to the deposition of a complete Pd atomic layer. For thicker deposits, especially above 10 monolayers as equivalent thickness, the electrochemical characterization displays a strong irreversibility and a broadening of the adsorption/desorption peaks, associated with a reduction of long range ordered flat areas...
February 13, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28190843/application-of-internal-standard-method-for-several-3d-transition-metallic-elements-in-flame-atomic-absorption-spectrometry-using-a-multi-wavelength-high-resolution-spectrometer
#9
Yusuke Toya, Toshiko Itagaki, Kazuaki Wagatsuma
We investigated a simultaneous internal standard method in flame atomic absorption spectrometry (FAAS), in order to better the analytical precision of 3d-transition metals contained in steel materials. For this purpose, a new spectrometer system for FAAS, comprising a bright xenon lamp as the primary radiation source and a high-resolution Echelle monochromator, was employed to measure several absorption lines at a wavelength width of ca. 0.3 nm at the same time, which enables the absorbances of an analytical line and also an internal standard line to be estimated...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28189109/superior-selectivity-and-enhanced-response-characteristics-of-palladium-sensitized-vanadium-pentoxide-nanorods-for-detection-of-nitrogen-dioxide-gas
#10
A A Mane, M P Suryawanshi, J H Kim, A V Moholkar
Vanadium pentoxide (V2O5) nanorods have been deposited onto the glass substrates by spraying 75ml of 30mM vanadium trichloride (VCl3) solution at optimized substrate temperature of 400°C. The XRD study confirms the formation of orthorhombic crystal structure of V2O5 nanorods. The FE-SEM micrograph shows the nanorods-like morphology of V2O5. The presence of palladium (Pd) in the Pd-sensitized V2O5 nanorods is confirmed using EDAX study. The gas sensing measurements show that the Pd-sensitized V2O5 sensing material is an outstanding candidate for nitrogen dioxide (NO2) gas detection...
February 3, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28186734/synthesis-and-characterization-of-ferrocenyl-chlorins-1-1-ferrocene-linked-chlorin-dimers-and-their-bodipy-analogues
#11
Anna I Arkhypchuk, Andreas Orthaber, K Eszter Borbas
We present the synthesis and characterization of meso-ferrocenyl-substituted hydroporphyrins (chlorins) and 1,1'-linked chlorin dimers. The dipyrromethane chlorin precursors were also transformed into Fc-substituted BODIPYs and 1,1'-ferrocenyl-linked BODIPY dimers. The chlorin dimers were studied by 1D and 2D NMR experiments and DFT calculations, which showed that their solution structures were dependent on the central metal. Monomeric and dimeric Ni(II) chlorins had similar (1)H NMR spectra. Monomeric and dimeric free base, Zn(II), and Pd(II) chlorins, on the other hand, showed significantly more different spectra...
February 10, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28185405/evaluation-of-long-term-combination-therapy-with-peritoneal-dialysis-and-hemodialysis
#12
Reo Kanda, Hiroaki Io, Junichiro Nakata, Yuko Makita, Yu Sasaki, Mayumi Matsumoto, Keiichi Wakabayashi, Yasuhiko Tomino, Yusuke Suzuki
It is well known that a combination therapy with peritoneal dialysis (PD) and hemodialysis (HD) is feasible and may improve clinical status in patients for whom adequate solute and fluid removal is difficult to achieve with PD alone. The objective of the present study was to evaluate whether the therapy is useful in the likelihood of long-term peritoneal membrane and cardiac function. The therapy was 6 days of PD and one session of HD per week. Physical, biochemical, dialysate-to-plasma ratio of creatinine (D/P Cr), arteriovenous fistula (AVF) blood flow, and left ventricular mass index (LVMI) data were prospectively analyzed in 30 patients with measurements performed at 0 and 6 months, and for 21 patients, 12 or 18 months after initiation of the therapy...
February 10, 2017: Therapeutic Apheresis and Dialysis
https://www.readbyqxmd.com/read/28157305/bridged-n-heterocyclic-mesoionic-nhc-mic-heterodicarbenes-as-ligands-for-transition-metal-complexes
#13
Daniel Mendoza-Espinosa, Alejandro Alvarez-Hernández, Deyanira Angeles-Beltrán, Guillermo E Negrón-Silva, Oscar R Suárez-Castillo, José M Vásquez-Pérez
Following a copper catalyzed alkyne azide cycloaddition (CuAAC) and N-alkylation protocols, we report the preparation of a hybrid N-heterocyclic/mesoionic [NHC(H(+))-MIC(H(+))][2I](2-) salt (1) in high yields. The treatment of salt 1 with Cu2O and KI yields a second hybrid NHC/MIC proligand featuring a tetraiodocuprate anion [NHC(H(+))-MIC(H(+))][Cu2I4](2-) (2). Through selective deprotonation and metalation, both salts 1 and 2 can generate either the chelate heterodicarbene complexes (3) with the rare [NHC·(M)·MIC](+)[MX2](-) general formula (M = Pd(II), Rh(I)) or NHC-anchored/pendent triazolium species (4) [NHC·(M)-MIC(H(+))]...
February 20, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28153197/peritoneal-membrane-preservation
#14
REVIEW
M Auxiliadora Bajo, Gloria Del Peso, Isaac Teitelbaum
Peritoneal dialysis (PD) is a successfully used method for renal replacement therapy. However, long-term PD may be associated with peritoneal fibrosis and ultrafiltration failure. The key factors linked to their appearance are repeated episodes of inflammation associated with peritonitis and long-term exposure to bioincompatible PD fluids. Different strategies have been proposed to preserve the peritoneal membrane. This article reviews the functional and structural alterations related to PD and strategies whereby we may prevent them to preserve the peritoneal membrane...
January 2017: Seminars in Nephrology
https://www.readbyqxmd.com/read/28153193/low-gdp-solution-and-glucose-sparing-strategies-for-peritoneal-dialysis
#15
REVIEW
Cheuk Chun Szeto, David W Johnson
Long-term exposure to a high glucose concentration in conventional peritoneal dialysis (PD) solution has a number of direct and indirect (via glucose degradation products [GDP]) detrimental effects on the peritoneal membrane, as well as systemic metabolism. Glucose- or GDP-sparing strategies often are hypothesized to confer clinical benefits to PD patients. Icodextrin (glucose polymer) solution improves peritoneal ultrafiltration and reduces the risk of fluid overload, but these beneficial effects are probably the result of better fluid removal rather than being glucose sparing...
January 2017: Seminars in Nephrology
https://www.readbyqxmd.com/read/28153192/current-challenges-and-opportunities-in-pd
#16
REVIEW
Philip Kam-Tao Li, Vickie Wai-Ki Kwong
Despite the gradual increased use of peritoneal dialysis (PD) globally around the world, it is recognized that a number of areas in PD as a renal-replacement therapy require attention and improvements. The current challenges in PD include how to tackle technique failure and sustain long-term PD, manage and prevent peritoneal infections, malnutrition and inflammation, cardiovascular mortality, volume overload, glucose exposure, adequacy of solute removal, peritoneal access, peritoneal physiology and changes with long-term PD, patient fatigue, psychosocial issues, and care of elderly patients on PD...
January 2017: Seminars in Nephrology
https://www.readbyqxmd.com/read/28150716/creation-of-pd-al2o3-catalyst-by-a-spray-process-for-fixed-bed-reactors-and-its-effective-removal-of-aqueous-bromate
#17
Yu Gao, Wuzhu Sun, Weiyi Yang, Qi Li
Palladium nanoparticles were grown on sub-millimeter activated Al2O3 particle support by spraying H2PdCl4 solution evenly onto the support, followed with a thermal reduction under H2 atmosphere. Compared with its counterpart created by the conventional impregnation method, the Pd/Al2O3 catalyst created by the spray process could enrich the existence of active Pd nanoparticles on the surface of the catalyst support and increase their degree of dispersion, resulting in a much higher activity in the catalytic reduction of bromate in water...
February 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28134348/three-dimensional-ordered-mesoporous-co3o4-enhanced-by-pd-for-oxygen-evolution-reaction
#18
Qing Qu, Jian-Hua Zhang, Jing Wang, Qing-Yu Li, Chang-Wei Xu, Xihong Lu
Considerable efforts have been devoted recently to design and fabrication of high performance and low cost electrocatalysts for oxygen evolution reaction (OER). However, catalytic activity of current electrocatalysts is usually restricted by high onset potential and limited active sites. Herein, we fabricated three-dimensional (3D) highly ordered mesoporous Pd-Co3O4 composite materials as excellent electrocatalysts for OER in alkaline solution with high activity and stability. Three-dimensional highly ordered mesoporous Co3O4 material was firstly synthesized using mesoporous silica KIT-6 as hard template...
January 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28125410/prehospital-patient-records-facilitating-constructive-dialogue-and-co-construction-through-pd
#19
Preben Holst Mogensen, Susanne Wollsen
The paper presents the case of developing, adapting, and implementing an electronic prehospital patient records system in Scandinavia. The system is now fully implemented and it is used by all stakeholders within the prehospital domain. The paper focuses on the participatory design process of adapting the technical solution specified in the call for tender with the complex organizational context of actors with very diverse tasks and objectives and situated in five different regions each with their special geographical and demographical challenges...
2017: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/28111028/solute-and-water-transport-in-peritoneal-dialysis-a-case-based-primer
#20
Ramesh Khanna
Peritoneal dialysis (PD) is an effective therapy for patients with end-stage kidney disease. Dialysis solutions containing physiologic concentrations of electrolytes and base, as well as glucose often at supraphysiologic concentrations, are infused into the peritoneal cavity for solute and water exchange, and the patient's own peritoneal membrane is used for dialysis. The peritoneal membrane is dominated by small pores, which allow transport of water and small-molecular-size solutes, including electrolytes, by way of both diffusion and convection...
January 19, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
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