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https://www.readbyqxmd.com/read/27585065/-nhc-cu-catalyzed-mild-c-h-amidation-of-hetero-arenes-with-deprotectable-carbamates-scope-and-mechanistic-studies
#1
Weilong Xie, Jung Hee Yoon, Sukbok Chang
Primary arylamines are an important unit broadly found in synthetic, biological, and materials science. Herein we describe the development of a (NHC)Cu system that mediates a direct C-H amidation of (hetero)arenes by using N-chlorocarbamates or their sodio derivatives as the practical amino sources. A facile stoichiometric reaction of reactive copper-aryl intermediates with the amidating reagent led us to isolate key copper arylcarbamate species with the formation of a C-N bond. The use of (t)BuONa base made this transformation catalytic under mild conditions...
September 28, 2016: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27571866/-not-available
#2
Rosa M Ortega Anta, Ana Isabel Jiménez Ortega, José Miguel Perea Sánchez, Esther Cuadrado Soto, Ana M López Sobaler
Objetivos: la hipertensión arterial es un problema sanitario frecuente y con repercusiones sanitarias graves, infradiagnosticado y modulado por los hábitos alimentarios, estilo de vida e ingesta de diversos nutrientes, por lo que analizar los datos más recientes sobre la implicación de la nutrición en la prevención y control de la hipertensión es el objeto de la presente revisión.Métodos: búsqueda bibliográfica en relación con el tema.Resultados: aunque las pautas más conocidas y seguidas son la restricción en la ingesta de sodio, el control de peso y la moderación en el consumo de alcohol, la mejora de la dieta (aumento en el consumo de cereales, verduras, frutas...
2016: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/27019265/-in-process-citation
#3
Rafael Moreno Rojas, Alicia Moreno Ortega, Luis M Medina Canalejo, Montserrat Vioque Amor, Fernando Cámara Martos
Introducción: el salmorejo cordobés está tomando fama a nivel nacional y reconocimiento internacional. Sin embargo, son muy diversas las formas de elaborarlo y, por tanto, las propiedades organolépticas y nutricionales del plato.Material y métodos: con la intención de realizar una estandarización del salmorejo y forma de elaboración que permita una posterior protección de su identidad, así como su caracterización nutricional, se ha realizado una encuesta sobre el 83% de los establecimientos de restauración de Córdoba (excluidos barrios periféricos y zona industrial) para indagar su forma de elaborarlo, en cuanto a denominación, ingredientes, preparación, precio, etc...
2016: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/27019248/-in-process-citation
#4
Guillermo Molina Recio, Rafael Moreno Rojas, María García Rodríguez, Manuel Vaquero Abellán
Introducción: un gran número de encuestas nutricionales en Perú han identificado la magnitud y la ubicación de los diferentes tipos de desnutrición, siendo la forma crónica la más prevalente. Sin embargo, aunque las tasas pueden considerarse alarmantes (aún más en las zonas rurales), sólo un trabajo contiene información sobre las características de la ingesta, usando recordatorios de 24 horas (R24). Es decir, se carece de otros sistemas de estudio centrados en conocer las características gastronómicas de sus regiones y la biodisponibilidad de los alimentos, con el fin de localizar el origen de esta situación en cada área y proponer soluciones verdaderamente eficaces y eficientes...
2016: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/27019237/-in-process-citation
#5
Fernanda Bissigo Pereira, Fernanda Miraglia, Caroline Barbosa Schmitz, Carmem Lúcia Oliveira da Silva, Alexandre Ramos Lazzarotto
Objetivo: identificar la ingestión alimentaria de macro y micronutrientes en adolescentes viviendo con VIH/sida que usan terapia anti-retroviral y compararlos a las Dietary Reference Intakes.Metodología: estudio transversal realizado con adolescentes de ambos sexos con VIH/sida, en el que se evaluó la composición dietética de macro y micronutrientes a través del recordatorio alimentario de 24h.Resultados: 39 adolescentes con una edad promedio de 15 años, un 51,3% del sexo masculino. Los participantes consumieron menos calorías totales en la dieta, fibra total (g/d), vitaminas liposolubles (A, D, E, K), vitamina B5 (mg/d), vitamina B9 (mg/d), vitamina C (mg/d), calcio (mg/d), fósforo (mg/d), potasio (mg/d) y magnesio (mg/d) que lo recomendado...
2016: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/25626762/chronic-stress-improves-no-and-ca2-flux-dependent-vascular-function-a-pharmacological-study
#6
Thiago Bruder-Nascimento, Dijon Henrique Salome Campos
Background: Stress is associated with cardiovascular diseases. Objective: This study aimed at assessing whether chronic stress induces vascular alterations, and whether these modulations are nitric oxide (NO) and Ca2+ dependent. Methods: Wistar rats, 30 days of age, were separated into 2 groups: control (C) and Stress (St). Chronic stress consisted of immobilization for 1 hour/day, 5 days/week, 15 weeks. Systolic blood pressure was assessed. Vascular studies on aortic rings were performed. Concentration-effect curves were built for noradrenaline, in the presence of L-NAME or prazosin, acetylcholine, sodium nitroprusside and KCl...
January 23, 2015: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/25622167/-contenido-de-sodio-en-la-dieta-diaria-de-ni%C3%A3-os-de-un-albergue-peruano
#7
(no author information available yet)
No abstract text is available yet for this article.
January 1, 2015: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/25494016/vascular-response-of-ruthenium-tetraamines-in-aortic-ring-from-normotensive-rats
#8
Ana Gabriela Conceição-Vertamatti, Luiz Alberto Ferreira Ramos, Ivy Calandreli, Aline Nunes Chiba, Douglas Wagner Franco, Elia Tfouni, Dora Maria Grassi-Kassisse
BACKGROUND: Ruthenium (Ru) tetraamines are being increasingly used as nitric oxide (NO) carriers. In this context, pharmacological studies have become highly relevant to better understand the mechanism of action involved. OBJECTIVE: To evaluate the vascular response of the tetraamines trans-[Ru(II)(NH3)4(Py)(NO)](3+), trans-[Ru(II)(Cl)(NO) (cyclan)](PF6)2, and trans-[Ru(II)(NH3)4(4-acPy)(NO)](3+). METHODS: Aortic rings were contracted with noradrenaline (10(-6) M)...
March 2015: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/25098629/interaction-of-electrons-with-cisplatin-and-the-subsequent-effect-on-dna-damage-a-density-functional-theory-study
#9
Hsing-Yin Chen, Hui-Fen Chen, Chai-Lin Kao, Po-Yu Yang, Sodio C N Hsu
Cisplatin, Pt(NH3)2Cl2, is a leading chemotherapeutic agent that has been widely used for various cancers. Recent experiments show that combining cisplatin and electron sources can dramatically enhance DNA damage and the cell-killing rate and, therefore, is a promising way to overcome the side effects and the resistance of cisplatin. However, the molecular mechanisms underlying this phenomenon are not clear yet. By using density functional theory calculations, we confirm that cisplatin can efficiently capture the prehydrated electrons and then undergo dissociation...
September 28, 2014: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/23363248/theoretical-study-of-the-protonation-of-the-one-electron-reduced-guanine-cytosine-base-pair-by-water
#10
Sodio C N Hsu, Tzu-Pin Wang, Chai-Lin Kao, Hui-Fen Chen, Po-Yu Yang, Hsing-Yin Chen
Prototropic equilibria in ionized DNA play an important role in charge transport and radiation damage of DNA and, therefore, continue to attract considerable attention. Although it is well-established that electron attachment will induce an interbase proton transfer from N1 of guanine (G) to N3 of cytosine (C), the question of whether the surrounding water in the major and minor grooves can protonate the one-electron-reduced G:C base pair still remains open. In this work, density functional theory (DFT) calculations were employed to investigate the energetics and mechanism for the protonation of the one-electron-reduced G:C base pair by water...
February 21, 2013: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/23270752/a-simple-competition-assay-to-probe-pentacopper-i-thiolato-cluster-ligand-exchange
#11
Yi-Hsun Chen, Troy T Y Lin, Hsuan-Ying Chen, Chai-Lin Kao, Hsing-Yin Chen, Sodio C N Hsu, James R Carey, Michael Y Chiang
Two pentanuclear copper(I) thiolato clusters of the formula [Cu(5)(L)(3)](-) (L = pyridine-2,6-dimethanethiolate (L1), (1); 4-methylpyridine-2,6-dimethanethiolate (L2), (2)) were synthesized utilizing a single-step procedure, and their structures were characterized by X-ray crystallography. The aforementioned pentanuclear complexes possess an interesting propeller-like Cu(5)S(6) core where all Cu centers are three-coordinate. Electrospray ionization mass spectrometry (ESI-MS) investigation of the pentanuclear copper(I) thiolato clusters with added hetero-ligands demonstrated interesting ligand exchange behavior...
March 2013: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/22905707/copper-i-nitro-complex-with-an-anionic-hb-3-5-me2pz-3-%C3%A2-ligand-a-synthetic-model-for-the-copper-nitrite-reductase-active-site
#12
Sodio C N Hsu, Yu-Lun Chang, Wan-Jung Chuang, Hsing-Yin Chen, I-Jung Lin, Michael Y Chiang, Chai-Lin Kao, Hsuan-Ying Chen
The new copper(I) nitro complex [(Ph(3)P)(2)N][Cu(HB(3,5-Me(2)Pz)(3))(NO(2))] (2), containing the anionic hydrotris(3,5-dimethylpyrazolyl)borate ligand, was synthesized, and its structural features were probed using X-ray crystallography. Complex 2 was found to cocrystallize with a water molecule, and X-ray crystallographic analysis showed that the resulting molecule had the structure [(Ph(3)P)(2)N][Cu(HB(3,5-Me(2)Pz)(3))(NO(2))]·H(2)O (3), containing a water hydrogen bonded to an oxygen of the nitrite moiety...
September 3, 2012: Inorganic Chemistry
https://www.readbyqxmd.com/read/22833356/extraction-of-cupric-ions-with-ionic-liquids-containing-polypyridine-type-small-molecules-or-peripherally-pyridine-modified-dendrimers
#13
Chung-Jui Su, Yi-Hsuan Tang, Fu-Lun Yu, Ru-Rong Wu, Sodio C N Hsu, Chai-Lin Kao, Hsin-Yi Huang, Po-Yu Chen
The hydrophobic ionic liquid N-butyl-N-methylpyrrolidinium bis((trifluoromethyl)sulfonyl)amide (BMP-TFSA IL), which contains a series of flexible ionophores of polypyridine-type small molecules or two rigid ionophores of peripherally pyridine-modified PAMAM dendrimers, was used to extract cupric ions from aqueous solutions. The polypyridine-type ionophores show good selectivity toward cupric ions at pH 2. The selectivity is affected by the spacing between the two amino groups. However, the pyridine-modified dendrimers showed poor selectivity, although their extraction efficiency still depended on the pH of the aqueous solution...
October 2012: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/22333925/synthesis-characterization-and-catalytic-activity-of-lithium-and-sodium-iminophenoxide-complexes-towards-ring-opening-polymerization-of-l-lactide
#14
Wei-Yi Lu, Mon-Wei Hsiao, Sodio C N Hsu, Wei-Te Peng, Ya-Ju Chang, Yu-Chi Tsou, Ting-Yi Wu, Yi-Chun Lai, Yun Chen, Hsuan-Ying Chen
A series of lithium and sodium iminophenoxide complexes have been successfully synthesized and characterized by X-ray crystallography and investigated as catalysts for the ring opening polymerization of L-lactide. The nature and steric bulk of the ligands coordinated to the central metal ions greatly influence the catalytic properties. Complexes with bidenate ligands exhibit higher catalytic activity than tridentate counterparts because the third coordination atom contends with L-lactide, which decreases activity...
April 7, 2012: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/21999490/self-assembly-and-redox-modulation-of-the-cavity-size-of-an-unusual-rectangular-iron-thiolate-aryldiisocyanide-metallocyclophane
#15
Pei-Chin Lin, Hsing-Yin Chen, Po-Yu Chen, Ming-Hsi Chiang, Michael Y Chiang, Ting-Shen Kuo, Sodio C N Hsu
The decarbonylation reaction of ferric carbonyl dicationic [Cp(2)Fe(2)(μ-SEt)(2)(CO)(2)](BF(4))(2) [1(BF(4))(2)] carried out in refluxing acetonitrile affords a binuclear iron-sulfur core complex [Cp(2)Fe(2)(μ-SEt)(2)(CH(3)CN)(2)](BF(4))(2) [2(BF(4))(2)] containing two acetonitrile coordinated ligands. The treatment of 2(BF(4))(2) with 2 equiv of the 1,4-diisocyanobenzene (1,4-CNC(6)H(4)NC) results in the formation of the diisocyanide complex [Cp(2)Fe(2)(μ-SEt)(2)(1,4-CNC(6)H(4)NC)(2)](BF(4))(2) [3(BF(4))(2)]...
November 7, 2011: Inorganic Chemistry
https://www.readbyqxmd.com/read/21914531/potassium-encapsulated-arsenic-dithiolato-compounds-synthesis-structural-calculation-and-biological-relevance
#16
Sodio C N Hsu, Troy T Y Lin, Hsing-Yin Chen, Shih-Wei Chuo, Chai-Lin Kao, Po-Yu Chen, Min-Yuan Hung
This study based on the synthesis, characterization, and structural calculation of small molecular potassium-encapsulated arsenic-dithiolato compounds will provide fundamental knowledge about arsenic metabolism behavior in biological system. Two novel air-stable potassium-encapsulated arsenic-dithiolato compounds, [K@As(2)(L1)(3)](BF(4)) (1) and [K@As(2)(L2)(3)](BF(4)) (2), were prepared using deprotonated 2,6-bis(mercaptomethyl)pyridine (L1H(2)) and 1,3-dimercapto-m-xylene (L2H(2)) to react with AsCl(3) in the presence of potassium cation...
September 2011: Kaohsiung Journal of Medical Sciences
https://www.readbyqxmd.com/read/21395774/the-distribution-of-potassium-and-sodium-concentrations-in-the-erythrocytes-of-some-breeds-of-cattle
#17
J J Arranz, Y Bayón, F Primitivo
The distribution of erythrocyte potassium and sodium concentrations was studied in Sayaguesa (n = 150), Brown Swiss (n = 163) and two populations of Avileña-Negra Ibérica cattle (n = 141 and 141 respectively). No polymorphism was detected for red-cell cation content in any of the breeds investigated. Mean values of potassium concentrations varied between 21.42 and 24.92 mmol/l red cells, those of sodium contents ranging from 77.50-93.44 mmol/1. The cattle studied can thus be considered as belonging to the 'low potassium' (LK) type...
January 12, 1994: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/21152551/effect-of-nucleobase-sequence-on-the-proton-transfer-reaction-and-stability-of-the-guanine-cytosine-base-pair-radical-anion
#18
Hsing-Yin Chen, Shu-Wen Yeh, Sodio C N Hsu, Chai-Lin Kao, Teng-Yuan Dong
The formation of base pair radical anions is closely related to many fascinating research fields in biology and chemistry such as radiation damage to DNA and electron transport in DNA. However, the relevant knowledge so far mainly comes from studies on isolated base pair radical anions, and their behavior in the DNA environment is less understood. In this study, we focus on how the nucleobase sequence affects the properties of the guanine-cytosine (GC) base pair radical anion. The energetic barrier and reaction energy for the proton transfer along the N(1)(G)-H···N(3)(C) hydrogen bond and the stability of GC˙(-) (i...
February 21, 2011: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/21059403/copper-complex-of-a-pyridine-modified-poly-amidoamine-dendrimer-as-a-chemical-nuclease-synthetic-and-catalytic-study
#19
Chai-Lin Kao, Yi-Hsuan Tang, Yen Chung Lin, Li-Ting Chiu, Hui-Ting Chen, Sodio C N Hsu, Kuang-Chan Hsieh, Chi-Yu Lu, Yeh-Long Chen
UNLABELLED: [Cu(Y)((G:2-6)-dendri-PAMAM-(Py)(n))](2Y+) complexes (3) were prepared, and their ability to generate oxygen radical anions was investigated. The maximum catalytic efficiency (k'(cat)/K(M)) was found to be 0.32 min(-1)·μM(-1), and a positive dendritic effect was observed. The saturated kinetics revealed that the improved catalytic efficiency resulted from an enhanced binding affinity toward molecular oxygen. FROM THE CLINICAL EDITOR: In this basic science study, the oxygen radical anion generating ability of specific copper complex of a pyridine-modified poly(amidoamine) dendrimer was investigated and reported in details...
June 2011: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/20481524/characterization-of-a-new-copper-i-nitrito-complex-that-evolves-nitric-oxide
#20
Wan-Jung Chuang, I-Jung Lin, Hsing-Yin Chen, Yu-Lun Chang, Sodio C N Hsu
The complexes [Cu(kappa(2)-Ph(2)PC(6)H(4)(o-OMe))(2)(CH(3)CN)](BF(4)) (1) and [CuCl(Ph(2)PC(6)H(4)(o-OMe))(2)] (2) have been prepared by treating [Cu(CH(3)CN)(4)](BF(4)) or CuCl with two equivalents o-(diphenylphosphino)anisole (Ph(2)PC(6)H(4)(o-OMe)) at room temperature, respectively. The reaction of 1 and (PPN)(NO(2)) in acetonitrile solution affords a neutral compound [Cu(Ph(2)PC(6)H(4)(o-OMe))(2)(ONO)] (3). In contrast to the synthesis of 3, mixing NaNO(2) and 1 in MeOH yielded a unique dicopper(I) cationic species, [((Ph(2)PC(6)H(4)(o-OMe))(2)Cu)(2)(mu-NO(2))](+) (4) after ether/CH(2)Cl(2) crystallization...
June 21, 2010: Inorganic Chemistry
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