Now showing items 2662-2681 of 2731

    • Garay Gutiérrez, Noé Francisco; Hernández Fuentes, Carolina; García Rivas, Gerardo; Lavandero González, Sergio; Guerrero Beltrán, Carlos Enrique (Springer, 2020)
      Even though effective drugs for treating hypertension are available, a great percentage of patients have inadequate control of their blood pressure. Unwanted side effects and inappropriate oral drug adherence are important ...
    • Dueik, V.; Robert Canales, Paz; Bouchon, P. (ELSEVIER, 2010)
      Recent consumer trends towards healthier and low fat products have had a significant impact on the snack industry. The objective of this study was to examine the most important quality parameters of vacuum and atmospheric ...
    • Castro, A.; Arancibia, Aquiles; Romero, P.; Gai, María Nella (GOVI-VERLAG GMBH, 2003-10)
      A validated HPLC method for the determination of ranitidine in human plasma is presented. Sulfanilamide as internal standard (IS) was used. Plasma samples were purified by solid phase extraction (SPE) using a copolymeric ...
    • Pérez, Renato F.; Lemus Gutiérrez, Igor; Bocic Vildósola, Ronny; Pérez, Mauricio; García, R. (AOAC INTERNATIONAL, 2001-09)
      The aim of the work described in this paper was to provide a fast, easy, inexpensive, precise, and accurate method for the determination of melatonine in solid pharmaceutical dosage forms. The developed method is based on ...
    • Pennacchiotti Monti, Irma; Vargas U., Marta; Caballero D., Hernán (Chile. Ministerio de Agricultura. Instituto de Investigaciones Veterinarias, 1951)
      Con este trabajo se ha dado comienzo al estudio de nuestros forrajes de secano, en lo que respecta a sus cualidades nutritivas. Se ha escogido el Alfilerillo por ser este uno de los recursos alimenticios mas antiguos de ...
    • Pennacchiotti Monti, Irma; Vargas U., Marta; Gazmuri P., Gabriela (Chile. Ministerio de Agricultura, Instituto de Investigaciones Veterinarias, 1953)
      Es de vital importancia para la nutrición animal, conocer el contenido de azufre y iodo en la alfalfa común (Medicago sativa), por ser este forraje uno de los más ricos en principios nutritivos y elementos minerales, y ...
    • Pennacchiotti Monti, Irma; Yanssens Gutiérrez, Gabriela (Chile, Instituto de Investigaciones Agropecuarias, 1953)
      El presente trabajo tiene por objeto estudiar el contenido en vitamina C en Alfalfa verde, Heno de alfalfa y Trébol y además Caroteno en Trébol, empleándose el método espectrofotométrico, por presentar este mayores ventajas ...
    • Pennacchiotti Monti, Irma; Alarcón, César; Vargas U., Marta; Ahumada L., Eugenia (Chile, Instituto de Investigaciones Agropecuarias, 1953)
      El presente trabajo ha sido motivado por la importancia que tiene que llevar al conocimineto del contenido vitamínico de algunos cereales cultivados en el país, que sirven de base a la alimentación animal. Las determinaciones ...
    • Pennacchiotti Monti, Irma; Vargas U., Marta; Flores del F., Carlos; Urba M., Rosa (Chile, Ministerio de Agricultura - Instituto de Investigaciones Veterinarias, 1952)
      De los diferentes métodos que se emplean para la valoración de la riboflavina en productos alimenticios, se distinguen tres por sus resultados mas homogéneos y satisfactorios: el fluorimétrico, el microbiológico y el animal ...
    • Fernández, C. O.; Kogan Bocian, Marcelo; Valasinas, A.; Frydman, B. (AMER CHEMICAL SOC, 1998-07-10)
    • Díaz Araya, Guillermo; Chiong Lay, Mario; Moraga, Francisco; Castro Agüero, Pablo; Pérez, Osvaldo; Vukasovic Ramírez, José Luis; Nazzal Nazal, Carolina; Padilla, Ivonne; Corbalán, Ramón; Moreno, Mauricio; Lavandero González, Sergio (Sociedad Chilena de Cardiología y Cirugía Cardiovascular, 2001)
      El proyecto Genoma Humano ha logrado descifrar la secuencia completa del genoma, aportando una herramienta única para el estudio de la genética humana. Sin embargo, se ha observado cada vez más frecuentemente la aparición ...
    • Fuentes Barros, Gonzalo; Castro Saavedra, Sebastián; Liberona, Leonel; Acevedo Fuentes, Williams; Tirapegui Calquín, Cristian; Mattar, César; Cassels Niven, Bruce (Elsevier, 2018-06)
      Eighteen alkaloids were detected in the bark, leaves, wood and roots of Peumus boldus, including traces of secoboldine, N-methylsecoboldine (boldine methine), glaucine and norreticuline, not reported previously as constituents ...
    • Olea, Andrés F.; Worrall, David R.; Wilkinson, Frank (2003)
      Data is presented on the quenching of 9,10-dicyanoanthracene by benzene derivatives in acetonitrile. The quenching occurs via a charge transfer mechanism with the quenching rate constants exhibiting a Rehm-Weller dependence ...
    • Cornwell, E. (SOC CHILENA QUIMICA, 2007-09)
      The aim of this work is based in the reduction of independent variables in multivariate regression analysis to one by means a vector dot product (E-3). By this way, it is omit the orthogonalized procedure to obtained valid ...
    • Araya Maturana, Ramiro; Pessoa Mahana, Hernán; Weiss López, Boris (NATURAL PRODUCTS INC, 2008)
      The structural elucidation of natural products and complex organic molecules relies heavily on the application of proton detected heteronuclear NMR. Among these techniques, the HMBC NMR experiment remains as the most popular ...
    • Garrido, Carlos; Clavijo, Ernesto; Copaja, Sylvia; Gómez Jeria, Juan; Campos Vallette, Marcelo (Elsevier Ltd, 2019)
      Carminic acid (CA) contained in one kind of gummy candy was detected and quantified by using vibrational and electronic spectroscopy, respectively; the proposed methodology in solution is simple and rapid without sample ...
    • Téllez, C.; Diaz, G. (1981)
      The IR and Raman spectra of solid diamminemercury(II) chloride with 14N/15N and H/D isotopic substitution have been measured. The spectra have been interpreted assuming D3d symmetry for the [Hg(NH3)2]2+ cations which have ...
    • Clavijo Campos, Ernesto; Weiss López, Boris; Rivera, L. Patricio (1996)
      FT-IR and FT-Raman spectra of Caulerpin, a green algae pigment, have been recorded. An assignment of the observed bands is proposed on the basis of previously reported vibrational spectra of similar structures. Intensity ...
    • Novoa, C.; Remy, D.; Gerbault, M.; Baez, J. C.; Tassara, A.; Cordova, L.; Cardona, C.; Granger, M.; Bonvalot, S.; Delgado, F. (Elsevier B.V., 2019)
      Silicic systems generate the most explosive eruptions on Earth. In contrast to basaltic systems, they can accumulate large volumes of magma without systematically erupting, confronting the classical interpretation that a ...
    • Benavente, Rosario; Pérez, E.; Yazdani-Pedram Zobeiri, Mehrdad; Quijada Abarca, Juan (ELSEVIER SCI LTD, 2002-12)
      The viscoelastic relaxations of four copolymers of ethylene and I-octadecene, with different comonomer contents, synthesized with a metallocene catalyst, have been analysed and compared to those of the corresponding ...