Browsing by Title Artículos de revistas

Now showing items 1263-1282 of 2801

    • Hindered rotation of some substituted thioureas in complexes of chromium and tungsten carbonyls 
      Granifo, J.; Costamagna, J.; Garrao, A.; Pieber, M. (1980)
      We describe a procedure for the preparation of various metal thiourea complexes of the type [M(CO)5L] in which M Cr or W and L TU (thiourea), TMTU (tetramethylthiourea), DptTU (NN′-di-p-totyl thiourea); DtBTU = (NN′-di-t-butyl ...
    • Hippocampal Memory Recovery After Acute Stress: A Behavioral, Morphological and Molecular Study 
      Aguayo, Felipe Ignacio; Tejos Bravo, Macarena; Díaz Véliz, Gabriela; Pacheco Zapata, Aníbal; García Rojo, Gonzalo; Corrales, Wladimir; Olave, Felipe Antonio; Aliaga, Esteban; Ulloa, José L.; Avalos, Ana M.; Román Albasini, Luciano; Rojas, Paulina S.; Fiedler Temer, Jenny (Frontiers Media S.A., 2018)
      © 2018 Aguayo, Tejos-Bravo, Díaz-Véliz, Pacheco, García-Rojo, Corrales, Olave, Aliaga, Ulloa, Avalos, Román-Albasini, Rojas and Fiedler. Several studies have shown that a single exposure to stress may improve or impair ...
    • Histopathological evaluation of renal papilla in bromoethylamine-treated rats: Effect of an N-acetylcysteine ... 
      Thielemann,; Valenzuela,; Pepper, (1994)
    • A holistic picture of Austronesian migrations revealed by phylogeography of Pacific paper mulberry 
      Chang, Chi-Shan; Liu, Hsiao-Lei; Moncada, Ximena; Seelenfreund, Andrea; Seelenfreund, Daniela; Chung, Kuo-Fang (National Academy of Sciences, 2015)
      The peopling of Remote Oceanic islands by Austronesian speakers is a fascinating and yet contentious part of human prehistory. Linguistic, archaeological, and genetic studies have shown the complex nature of the process ...
    • Homologous series of LC acrylic monomers based on phenyl benzoate core group: synthesis and characterisation 
      Romero Hasler, Patricio; Arismendi, D.; Richter Duk, Pablo; Soto Bustamante, Eduardo (Taylor & Francis, 2020)
      The synthesis and phase characterisation of a homologous series of monomers of acrylic phenyl benzoates has been carried out. The characterisation comprises polarised optical microscopy, differential scanning calorimetry ...
    • Honeybee pollen from southern Chile: phenolic profile, antioxidant capacity, bioaccessibility, and inhibition ... 
      Bridi, Raquel; Echeverría, Javier; Larena, Arturo; Núñez Pizarro, Paula; Atala, Elías; Costa De Camargo, Adriano; Oh, Won Young; Shahidi, Fereidoon; García, Olga; Ah-Hen, Kong S.; Montenegro, Gloria (Frontiers Media, 2022)
      Honeybee pollen (HBP) chemical composition is highly variable conforming to the floral and geographical origin of the pollen grains. The beneficial effects and functional properties of the HBP are well-known and have been ...
    • Hormonal modulation of the rat mammary gland γ-glutamyltranspeptidase 
      RÍos, M.; Puente, J.; Sapag-Hagar, M. (1989)
      1. The in vivo effect of estradiol and domperidone (a hypophysis stimulator of prolactin secretion) in immature ovariectomized-adrenalectomized and hypophysectomized rat mammary gland was studied. 2. γ-Glutamyltranspeptidase ...
    • Host-guest interaction between new nitrooxoisoaporphine and β-cyclodextrins: Synthesis, electrochemical, ... 
      Pérez Cruz, Fernanda; Aguilera Venegas, Benjamín; Lapier, Michel; Sobarzo Sánchez, Eduardo; Uriarte Villares, Eugenio; Olea Azar, Claudio (2013)
      A new nitrooxoisoaporphine derivative was synthetized and characterized by cyclic voltammetry and electron spin resonance. Its aqueous solubility was improved by complexes formation with β-cyclodextrin, heptakis(2,6-di-O- ...
    • Host–guest interaction between new nitrooxoisoaporphine and b-cyclodextrins: Synthesis, electrochemical, ... 
      Pérez Cruz, Fernanda; Aguilera Venegas, Benjamín; Lapier, Michel; Sobarzo Sánchez, Eduardo; Uriarte Villares, Eugenio; Olea Azar, Claudio (Elsevier, 2012-10-26)
      A new nitrooxoisoaporphine derivative was synthetized and characterized by cyclic voltammetry and electron spin resonance. Its aqueous solubility was improved by complexes formation with b-cyclodextrin, heptakis(2,6-di ...
    • How Changes in the Sequence of the Peptide CLPFFD-NH2 Can Modify the Conjugation and Stability of Gold ... 
      Olmedo, Ivonne; Araya, Eyleen; Sanz, Fausto; Medina, Elias; Arbiol, Jordi; Toledo, Pedro; Álvarez Lueje, Alejandro; Giralt, Ernest; Kogan Bocian, Marcelo (American Chemical Society, 2008-05-30)
      In a previous work, we studied the interaction of -amyloid fibrils (A ) with gold nanoparticles (AuNP) conjugated with the peptide CLPFFD-NH2. Here, we studied the effect of changing the residue sequence of the ...
    • How changes in the sequence of the peptide CLPFFD-NH2 can modify the conjugation and stability of gold ... 
      Olmedo Alegría, Ivonne Odette; Araya, Eyleen; Sanz, F.; Medina Consuegra, Elías Daniel; Arbiol, Jordi; Toledo, P.; Álvarez Lueje, Alejandro; Giralt, Ernest; Kogan Bocian, Marcelo (AMER CHEMICAL SOC, 2008-06)
      In a previous work, we studied the interaction of P-amyloid fibrils (A beta) with gold nanoparticles (AuNP) conjugated with the peptide CLPFFD-NH2. Here, we studied the effect of changing the residue sequence of the peptide ...
    • HPLC determination of nimesulide in tablets by electrochemical detection 
      Álvarez Lueje, Alejandro; Vásquez,; Núñez Vergara, Luis; Squella Serrano, Juan (Taylor and Francis Inc., 1998)
      An analytical chromatographic method for the determination of nimesulide in pharmaceutical forms has been developed. The method is based on high performance liquid chromatographic (HPLC) and electrochemical detection. ...
    • HUMAN PLACENTAL ATP-DIPHOSPHOHYDROLASE - BIOCHEMICAL .CHARACTERIZATION, REGULATION AND FUNCTION 
      Kettlun, Ana María; Alvarez, A.; Quintar, R.; Valenzuela Pedevila, María Antonieta; Collados, L. E.; Aranda, E.; Banda, A.; Chayet, L.; Chiong Lay, Mario; Mancilla, Marta; Traverso Cori, A. (PERGAMON-ELSEVIER SCIENCE LTD, 1994-03)
      1. Kinetic and physico-chemical studies on human placental microsomal fraction confirmed that the ATPase and ADPase activities detected in this fraction correspond to the enzyme ATP-diphosphohydrolase or apyrase (EC 3.6.1.5). ...
    • Human T-Lymphotropic Virus Type 1 and 2 Seroprevalence among first-time blood donors in Chile, 2011-2013 
      San Martín, Hector; Balanda, Monserrat; Vergara, Nicolas; Valenzuela Pedevila, María Antonieta; Cartier Rovirosa, Luis; Ayala, Salvador; Ramírez, Eugenio (Wiley & Sons, 2016-06)
      Infection with human T-lymphotropic virus type 1/2 (HTLV-1/2) is a major health problem. HTLV-1/2 infection is endemic in Chile but representative donor prevalence data are lacking. Data on all blood donors in a large ...
    • Huperzine-A administration recovers rat ovary function after sympathetic stress 
      Riquelme, Raúl; Ruz, Freddy; Mayerhofer, Artur; Lara Peñaloza, Hernán (Wiley, 2020)
      Chronic cold stress affects ovarian morphology and impairs fertility in rats. It causes an ovarian polycystic ovary (PCOS)-like phenotype, which resembles PCOS in women. The mechanism of cold stress action involves increased ...
    • Hyaluronan nanocapsules as a new vehicle for intracellular drug delivery 
      Oyarzún Ampuero, Felipe; Rivera Rodríguez, Gustavo R.; Alonso, Maria J.; Torres, Dolores (Elsevier, 2013)
      Here we report the development of new drug nanocarriers – named hyaluronan nanocapsules – for the intracellular delivery of hydrophobic anticancer drugs. These nanocapsules are composed of a lipid core and a shell of ...
    • Hybrid ternary organic-inorganic films based on interpolymer complexes and silica 
      Martínez, Y.; Retuert de la Torre, Pedro Jaime; Yazdani-Pedram Zobeiri, Mehrdad; Colfen, H. (ELSEVIER SCI LTD, 2004-05-11)
      Homogeneous transparent hybrid films consisting of chitosan (CHI), poly(monomethyl itaconate) (PMMI) and silica were obtained indicating the absence of microphase separation. These ternary hybrid materials are very interesting ...
    • Hydralazine protects the heart against acute ischaemia/reperfusion injury by inhibiting Drp1-mediated ... 
      Kalkhoran, Siavash Beikoghli; Kriston-Vizi, Janos; Hernández Resendiz, Sauri; Crespo Avilan, Gustavo E.; Rosdah, Ayeshah A.; Lees, Jarmon G.; Simoes Da Costa, Joanna Rodrigues; Ling, Naomi X. Y.; Holien, Jessica K.; Samangouei, Parisa; Chinda, Kroekkiat; Yap, En Ping; Riquelme Meléndez, Jaime Andrés; Ketteler, Robin; Yellon, Derek M.; Lim, Shiang Y.; Hausenloy, Dereck J. (Oxford University Press, 2022)
      Aims Genetic and pharmacological inhibition of mitochondrial fission induced by acute myocardial ischaemia/reperfusion injury (IRI) has been shown to reduce myocardial infarct size. The clinically used anti-hypertensive ...
    • Hydroesterification versus hydroformylation-acetalization of 1-hexene catalyzed by soluble carbonylrhodium ... 
      Pardey, Alvaro J.; Uzcátegui, Gabriela C.; Hung-Low, Fernando; Rivas, Angel B.; Yáñez, Jorge; Ortega, Marisol C.; Longo, Clementina; Aguirre Álvarez, Pedro; Moya, Sergio A. (ELSEVIER SCIENCE BV, 2005-09-14)
      The rhodium(l) complexes, cis-[Rh(CO)(2)(amine)(2)] (PF6) (amine = pyridine, 2-picoline, 3-picoline, 4-picoline, 3,5-lutidine or 2,6-lutidine) dissolved in methanol under carbon monoxide atmosphere are effective catalysts ...
    • Hydrogels based on modified chitosan, 1 - Synthesis and swelling behavior of poly(acrylic acid) grafted chitosan 
      Yazdani-Pedram Zobeiri, Mehrdad; Retuert de la Torre, Pedro Jaime; Quijada Abarca, Juan (WILEY-V C H VERLAG GMBH, 2000-06-20)
      A large number of carboxylic groups were introduced onto chitosan by grafting with poly(acrylic acid) as an efficient way of modification. The reactions were carried out in a homogeneous aqueous phase by using potassium ...