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https://www.readbyqxmd.com/read/29165918/micelle-assisted-electrodeposition-of-mesoporous-fe-pt-smooth-thin-films-onto-various-substrates-and-their-electrocatalytic-activity-towards-hydrogen-evolution-reaction
#1
Eloy Isarain-Chávez, Maria Dolors Baró, Carlos Alcantara, Salvador Pané, Jordi Sort, Eva Pellicer
Mesoporous Fe-Pt thin films are obtained by micelle-assisted electrodeposition onto metallic substrates with dissimilar activity (namely, gold, copper, and aluminum seed-layers evaporated on Si/Ti) under constant applied potential (E= -1.1 V vs. Ag/AgCl) and deposition time (600 s). The amphiphilic triblock copolymer Pluronic P-123 is used as a soft-template to guide the formation of mesopores. The occurrence of pores (ca. 7 nm in diameter) with narrow size distribution, regularly distributed over the surface, is observed in all cases...
November 22, 2017: ChemSusChem
https://www.readbyqxmd.com/read/29163329/dystonic-dysarthria-in-wilson-disease-efficacy-of-zolpidem
#2
Aurélia Poujois, Michaela Pernon, Jean-Marc Trocello, France Woimant
Wilson disease (WD) is a rare genetic disorder characterized by copper overload in the liver and the brain. Neurological presentations are mainly related to the accumulation of copper in the basal ganglia, the brainstem, and the cerebellum. Dysarthria is a frequent symptom, with dystonic, spastic, or parkinsonian components and is usually resistant to medical or voice rehabilitation therapies. Here, we report the case of a patient with WD diagnosed at the age of 12, who presented a severe and constant dysarthria from dystonic origin which was unresponsive to benzodiazepines and anticholinergic drugs...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29113038/micronutrient-dietary-intake-in-latina-pregnant-adolescents-and-its-association-with-level-of-depression-stress-and-social-support
#3
Angelie Singh, Caroline Trumpff, Jeanine Genkinger, Alida Davis, Marisa Spann, Elizabeth Werner, Catherine Monk
Adolescent pregnant women are at greater risk for nutritional deficits, stress, and depression than their adult counterparts, and these risk factors for adverse pregnancy outcomes are likely interrelated. This study evaluated the prevalence of nutritional deficits in pregnant teenagers and assessed the associations among micronutrient dietary intake, stress, and depression. One hundred and eight pregnant Latina adolescents completed an Automated Self-Administered 24-hour dietary recall (ASA24) in the 2nd trimester...
November 4, 2017: Nutrients
https://www.readbyqxmd.com/read/29018857/plasmon-mediated-fe-o-in-an-octahedral-site-of-cuprospinel-by-cu-nps-for-photocatalytic-hydrogen-evolution
#4
An Wang, Hewei Yang, Ting Song, Quan Sun, Hui Liu, Tingting Wang, Heping Zeng
Cu NPs (copper nanoparticles) were synthesized in situ on the surface of CuFe2O4 (cuprospinel). The enhancement of the separation efficiency of photogenerated e(-)/h(+) and the catalytic quantum efficiency showed that the LSPR (local surface plasmon resonance) of Cu NPs facilitated the photocatalytic reaction activity of CuFe2O4. And due to the fact that CuFe2O4 was constructed with Cu-O in the tetrahedral site and Fe-O in the octahedral site, the results of DTG and Raman spectra after HER (hydrogen evolution reaction) displayed that the phase change of Fe-O in the octahedral site of CuFe2O4 took place during the HER process, and along with the peak of Fe(2+) in XPS spectra after HER, which indicated that light activated Fe-O in the octahedral site was responsible for the photocatalytic process...
October 26, 2017: Nanoscale
https://www.readbyqxmd.com/read/28972733/encased-copper-boosts-the-electrocatalytic-activity-of-n-doped-carbon-nanotubes-for-hydrogen-evolution
#5
Yun Zhang, Yuling Ma, Yu-Yun Chen, Lu Zhao, Lin-Bo Huang, Hao Luo, Wen-Jie Jiang, Xing Zhang, Shuai Niu, Daojiang Gao, Jian Bi, Guangyin Fan, Jin-Song Hu
Nitrogen (N)-doped carbons combined with transition-metal nanoparticles are attractive as alternatives to the state-of-the-art precious metal catalysts for hydrogen evolution reaction (HER). Herein, we demonstrate a strategy for fabricating three-dimensional (3D) Cu-encased N-doped carbon nanotube arrays which are directly grown on Cu foam (Cu@NC NT/CF) as a new efficient HER electrocatalyst. Cu nanoparticles are encased here instead of common transition metals (Fe, Co, or Ni) for pursuing a well-controllable morphology and an excellent activity by taking advantage of its more stable nature at high temperature and in acidic or alkaline electrolyte...
October 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28797164/universal-surface-engineering-of-transition-metals-for-superior-electrocatalytic-hydrogen-evolution-in-neutral-water
#6
Bo You, Xuan Liu, Guoxiang Hu, Sheraz Gul, Junko Yano, De-En Jiang, Yujie Sun
The development of low-cost hybrid water splitting-biosynthetic systems that mimic natural photosynthesis to achieve solar-to-chemical conversion is of great promise for future energy demands, but often limited by the kinetically sluggish hydrogen evolution reaction (HER) on the surface of nonprecious transition metal catalysts in neutral media. It is thus highly desirable to rationally tailor the reaction interface to boost the neutral HER catalytic kinetics. Herein, we report a general surface nitrogen modification of diverse transition metals (e...
August 22, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28773796/investigation-of-various-active-layers-for-their-performance-on-organic-solar-cells
#7
Pao-Hsun Huang, Yeong-Her Wang, Jhong-Ciao Ke, Chien-Jung Huang
The theoretical mechanism of open-circuit voltages (VOC) in OSCs based on various small molecule organic materials is studied. The structure under investigation is simple planar heterojunction (PHJ) by thermal vacuum evaporation deposition. The various wide band gaps of small molecule organic materials are used to enhance the power conversion efficiency (PCE). The donor materials used in the device include: Alpha-sexithiophene (α-6T), Copper(II) phthalocyanine (CuPc), boron subnaphthalocyanine chloride (SubNc) and boron Subphthalocyanine chloride (SubPc)...
August 9, 2016: Materials
https://www.readbyqxmd.com/read/28727411/one-step-synthesis-of-antioxidative-graphene-wrapped-copper-nanoparticles-on-flexible-substrates-for-electronic-and-electrocatalytic-applications
#8
Chi-Ang Tseng, Chiao-Chen Chen, Rajesh Kumar Ulaganathan, Chuan-Pei Lee, Hsu-Cheng Chiang, Chin-Fu Chang, Yit-Tsong Chen
In this study, we report a novel, one-step synthesis method to fabricate multilayer graphene (MLG)-wrapped copper nanoparticles (CuNPs) directly on various substrates (e.g., polyimide film (PI), carbon cloth (CC), or Si wafer (Si)). The electrical resistivities of the pristine MLG-CuNPs/PI and MLG-CuNPs/Si were measured 1.7 × 10(-6) and 1.4 × 10(-6) Ω·m, respectively, of which both values are ∼100-fold lower than earlier reports. The MLG shell could remarkably prevent the Cu nanocore from serious damages after MLG-CuNPs being exposed to various harsh conditions...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28671221/a-new-preparation-of-a-bifunctional-crystalline-heterogeneous-copper-electrocatalyst-by-electrodeposition-using-a-robson-type-macrocyclic-dinuclear-copper-complex-for-efficient-hydrogen-and-oxygen-evolution-from-water
#9
Samit Majumder, Ashraf Abdel Haleem, Perumandla Nagaraju, Yoshinori Naruta
The development of low-cost, stable bifunctional electrocatalysts, which operate in the same electrolyte with a low overpotential for water splitting, including the oxygen evolution reaction and the hydrogen evolution reaction, remains an attractive prospect and a great challenge. In this study, a water soluble Robson-type macrocyclic dicopper(ii) complex has been used for the first time as a catalyst precursor for the generation of a copper-based bifunctional heterogeneous catalyst film, which can be used for both HER and OER at a near neutral pH...
July 18, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28333827/levels-of-silicon-in-maternal-cord-and-newborn-serum-and-their-relation-with-those-of-zinc-and-copper
#10
N Marta Díaz-Gómez, Emmanuel Bissé, Thibault Senterre, Nieves L González-González, Eduardo Domenech, Gabriele Lindinger, Thomas Epting, Flora Barroso
BACKGROUND: Evidence of silicon's importance to health has been gradually accumulating. Nevertheless, there are few studies comparing serum silicon levels in newborns with maternal levels. Likewise, little is known concerning the inter-relation between silicon and other trace elements. OBJECTIVE: The present study evaluated maternal and newborn levels of serum silicon and their relation to those of zinc and copper. METHODS: We measured serum silicon, copper, and zinc in 66 pregnant women, in the umbilical cord of their infants, and in 44 newborns, by atomic absorption spectrophotometry...
April 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28191583/a-hierarchically-porous-nickel-copper-phosphide-nano-foam-for-efficient-electrochemical-splitting-of-water
#11
Li Wei, Kunli Goh, Özgür Birer, H Enis Karahan, Jian Chang, Shengli Zhai, Xuncai Chen, Yuan Chen
Electrochemical splitting of water to produce oxygen (O2) and hydrogen (H2) through a cathodic hydrogen evolution reaction (HER) and an anodic oxygen evolution reaction (OER) is a promising green approach for sustainable energy supply. Here we demonstrated a porous nickel-copper phosphide (NiCuP) nano-foam as a bifunctional electrocatalyst for highly efficient total water splitting. Prepared from a bubble-templated electrodeposition method and subsequent low-temperature phosphidization, NiCuP has a hierarchical pore structure with a large electrochemical active surface area...
February 13, 2017: Nanoscale
https://www.readbyqxmd.com/read/28079359/pristine-graphene-electrode-in-hydrogen-evolution-reaction
#12
Aozhen Xie, Ningning Xuan, Kun Ba, Zhengzong Sun
Graphene, the sp(2) carbonaceous two-dimensional (2D) material, is gaining more attention in recent electrochemical studies. However, this atomic thick electrode usually suffers with surface contamination and poor electrochemical endurance. To overcome the drawbacks, we developed a PMMA-assisted, flipped transfer method to fabricate the graphene electrode with pristine surface and prolonged lifetime in hydrogen evolution reaction (HER). The HER performances of the single-layer graphene (SLG) were evaluated on various insulating and conductive substrates, including SiO2, polymers, SLG, highly oriented pyrolytic graphite (HOPG), and copper...
January 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28041671/liberation-of-metal-clads-of-waste-printed-circuit-boards-by-removal-of-halogenated-epoxy-resin-substrate-using-dimethylacetamide
#13
Himanshu Ranjan Verma, Kamalesh K Singh, Tilak Raj Mankhand
Present work reports the evaluation of dimethylacetamide (DMAc) as a solvent to dissolve the halogenated epoxy resin substrate (HERS) of waste printed circuit boards (WPCBs). Studies revealed that HERS dissolution attributes to the cracking and delamination of WPCB's layers. Variation of the parameters governing the dissolution elucidated that dissolution is directly dependent on temperature and WPCBs concentration in DMAc. The results also showed that increase in the WPCBs size drastically retards the rate of HERS dissolution...
February 2017: Waste Management
https://www.readbyqxmd.com/read/28008761/crystalline-copper-phosphide-nanosheets-as-an-efficient-janus-catalyst-for-overall-water-splitting
#14
Ali Han, Hanyu Zhang, Ruihan Yuan, Hengxing Ji, Pingwu Du
Hydrogen is essential to many industrial processes and could play an important role as an ideal clean energy carrier for future energy supply. Herein, we report for the first time the growth of crystalline Cu3P phosphide nanosheets on conductive nickel foam (Cu3P@NF) for electrocatalytic and visible light-driven overall water splitting. Our results show that the Cu3P@NF electrode can be used as an efficient Janus catalyst for both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER)...
January 9, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27930511/four-year-follow-up-of-a-wilson-disease-pedigree-complicated-with-epilepsy-and-hypopituitarism-case-report-with-a-literature-review
#15
REVIEW
Qi-Jie Zhang, Liu-Qing Xu, Chong Wang, Wei Hu, Ning Wang, Wan-Jin Chen
RATIONALE: Wilson's disease (WD) is an autosomal recessive inherited disorder of copper metabolism with excellent prognosis if treated timely. However, WD is usually prone to neglect and misdiagnosis at an early stage. We reported a rare WD pedigree, and the clinical features, laboratory tests, and gene mutations were analyzed in detail. PATIENT CONCERNS: The patient was a 17-year-old and 136-cm-tall girl who presented with limb weakness, combined with multi-organ disorders including blind eye, epilepsy, and hypopituitarism...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27818117/-induced-abortion-guidelines-for-clinical-practice%C3%A2-%C3%A2-text-of-the-guidelines-short-text
#16
REVIEW
C Vayssière, A Gaudineau, L Attali, K Bettahar, S Eyraud, P Faucher, P Fournet, D Hassoun, M Hatchuel, C Jamin, B Letombe, T Linet, M Msika Razon, A Ohanessian, H Segain, S Vigoureux, N Winer, S Wylomanski, A Agostini
OBJECTIVE: Develop recommendations for the practice of induced abortion. MATERIALS AND METHODS: The Pubmed database, the Cochrane Library and the recommendations from the French and foreign Gyn-Obs societies or colleges have been consulted. RESULTS: The number of induced abortions (IA) has been stable for several decades. There are a lot of factors explaining the choice of abortion when there is an unplanned pregnancy (UPP). Early initiation and choice of contraception in connection to the woman's life are associated with lower NSP...
December 2016: Journal de Gynécologie, Obstétrique et Biologie de la Reproduction
https://www.readbyqxmd.com/read/27748380/cu2o-cuo-bilayered-composite-as-a-high-efficiency-photocathode-for-photoelectrochemical-hydrogen-evolution-reaction
#17
Yang Yang, Di Xu, Qingyong Wu, Peng Diao
Solar powered hydrogen evolution reaction (HER) is one of the key reactions in solar-to-chemical energy conversion. It is desirable to develop photocathodic materials that exhibit high activity toward photoelectrochemical (PEC) HER at more positive potentials because a higher potential means a lower overpotential for HER. In this work, the Cu2O/CuO bilayered composites were prepared by a facile method that involved an electrodeposition and a subsequent thermal oxidation. The resulting Cu2O/CuO bilayered composites exhibited a surprisingly high activity and good stability toward PEC HER, expecially at high potentials in alkaline solution...
October 17, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27748114/a-highly-active-and-robust-copper-based-electrocatalyst-toward-hydrogen-evolution-reaction-with-low-overpotential-in-neutral-solution
#18
Jialei Du, Jianying Wang, Lvlv Ji, Xiaoxiang Xu, Zuofeng Chen
Although significant progress has been made recently, copper-based materials have long been considered to be ineffective catalysts toward the hydrogen evolution reaction (HER), in most cases, requiring high overpotentials more than 300 mV. We report here that a Cu(0)-based nanoparticle film electrodeposited in situ from a Cu(II) oxime complex can act as a highly active and robust HER electrocatalyst in neutral phosphate buffer solution. The as-prepared nanoparticle film is of poor crystallization, which incorporates significant amounts of oxime ligand residues and buffer anions PO4(3-)...
November 9, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27729749/ataxic-gait-following-total-gastrectomy-for-gastric-cancer
#19
Chang Ho Hwang, Dong Jin Park, Gyu Yeol Kim
A 58-year-old woman, who had undergone total gastrectomy for early gastric cancer 9 years previously, visited the outpatient clinic complaining of progressive difficulty in walking for 15 d. Laboratory examinations showed macrocytic anemia and a decreased serum vitamin B12 concentration and increased serum concentrations of folate, vitamin E and copper. Magnetic resonance imaging showed multifocal high signal intensities along the posterior column of the cervical and thoracic spinal cord. Treatment consisted of intramuscular injections of vitamin B12 for 7 d, which increased her serum level of vitamin B12 to normal...
October 7, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27695244/cardiac-arrhythmia-in-wilson-s-disease-an-oversighted-and-overlooked-entity
#20
Bhupender Kumar Bajaj, Ankur Wadhwa, Richa Singh, Saurabh Gupta
Wilson's disease is a multisystem disorder which manifests with hepatic, neurological, musculoskeletal, hematological, renal, and cardiac symptoms. The hepatic and neurological manifestations often overshadow the other system involvement including cardiac symptoms and signs, which may prove fatal. We report a case of a young female who presented with progressive parkinsonian features and dystonia for around 4 months followed 2 months later by the complaint of episodes of light-headedness. She was diagnosed to have Wilson's disease based on the presence of Kayser-Fleischer ring and laboratory parameters of copper metabolism...
October 2016: Journal of Neurosciences in Rural Practice
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