Browsing by Author "201-0014881"

Now showing items 21-29 of 29

    • Long-range correlations ((n)j (C,H) n > 3) in the HMBC spectra of 3-(4-oxo-4H-chromen-3-YL)-acrylic acid ... 
      Araya Maturana, Ramiro; Gavin Sazatornil, J. A.; Heredia Moya, Jorge; Pessoa Mahana, Hernán; Weiss López, Boris (SOC BRASILEIRA QUIMICA, 2005-05)
      A systematic study about the long-range correlations observed in the HMBC spectra of a series of cis and trans 3-(4-oxo-4H-chromen-3-yl)-acrylic acid ethyl esters, and 5-hydroxy derivatives, was carried out. The results ...
    • Molecular dynamics characterization of silver colloidal interfaces for SERS applications. Gallic acid test 
      Muñoz Gacitúa, D.; Garrido, C.; Ruíz Fernández, A.; Ahumada, H.; Campos Vallette, Marcelo; Araya Maturana, Ramiro; Weiss López, Boris (Wiley, 2018)
      One of the most useful applications of silver colloidal solutions is in surface-enhanced Raman spectroscopy (SERS), because the amplification factor of about 10(6) allows the vibrational study and detection of highly diluted ...
    • Protonation Sites, Tandem Mass Spectrometry and Computational Calculations of o-Carbonyl Carbazolequinone ... 
      Martínez Cifuentes, Maximiliano; Clavijo Allancan, Graciela; Zúñiga Hormazábal, Pamela; Aranda Zapata, Braulio Sebastián; Barriga, Andrés; Weiss López, Boris; Araya Maturana, Ramiro (MDPI AG, 2016)
      A series of a new type of tetracyclic carbazolequinones incorporating a carbonyl group at the ortho position relative to the quinone moiety was synthesized and analyzed by tandem electrospray ionization mass spectrometry ...
    • Regioselectivity in the Diels-Alder reaction of 8,8-dimethylnaphthalene-1,4,5(8H)-trione with 2,4-hexadien-1-ol 
      Araya Maturana, Ramiro; Cassels Niven, Bruce; Delgado Castro, Tomás; Valderrama Guerrero, Jaime Adolfo; Weiss López, Boris (PERGAMON-ELSEVIER SCIENCE LTD, 1999-01-15)
      The Diels-Alder reactions of 8,8-dimethylnaphtalene-1,4,5(8H)-trione with 2,4-hexadien-1-ol and its O-acetyl derivative were investigated in different solvents. The regiochemistry of the cycloaddition of the hexadienol was ...
    • SERS, Molecular Dynamics and Molecular Orbital Studies of the MRKDV Peptide on Silver and Membrane Surfaces 
      Aliaga, Alvaro E.; Ahumada, Hernán; Sepúlveda, K.; Gómez Jeria, Juan; Garrido, C.; Weiss López, Boris; Campos Vallette, Marcelo (AMER CHEMICAL SOC, 2011-03-17)
      The MRKDV peptide, structurally associated 9 with an immunomodulatory protein, was studied using surface 10 enhanced Raman scattering (SERS), molecular dynamics (MD) 11 simulations, and quantum chemical calculations. ...
    • Small structural changes on a hydroquinone scaffold determine the complex I inhibition or uncoupling of ... 
      Urra Faúndez, Félix; Córdova Delgado, Miguel; Lapier, Michel; Orellana Manzano, Andrea; Acevedo Arévalo, Luis; Pessoa Mahana, Hernán; González Vivanco, Jaime; Martínez Cifuentes, Maximiliano; Ramírez Rodríguez, Oney; Millas Vargas, Juan; Weiss López, Boris; Pavani, Mario; Ferreira Parker, Jorge; Araya Maturana, Ramiro (Academic Press Elsevier Science, 2016)
      Mitochondria participate in several distinctiveness of cancer cell, being a promising target for the design of anti-cancer compounds. Previously, we described that ortho-carbonyl hydroquinone scaffold 14 inhibits the complex ...
    • Structure and aggregation number of a lyotropic liquid crystal: A fluorescence quenching and molecular ... 
      Montecinos, R.; Ahumada, H.; Martínez, R.; Olea Carrasco, Floreal; Araya Maturana, Ramiro; Aliste, M. P.; Tieleman, D. P.; Weiss López, Boris (AMER CHEMICAL SOC, 2004-07-06)
      The structure and aggregation number of a discotic lyotropic liquid crystal, prepared from tetradecyltrimethylammonium chloride (TDTMACI)/decanol (DeOH)/NaCI/H2O, have been examined using fluorescence quenching of pyrene ...
    • Use of long-range C-H ((n)J n > 3) heteronuclear multiple bond connectivity in the assignment of the C-13 ... 
      Araya Maturana, Ramiro; Delgado Castro, Tomás; Cardona, Wilson; Weiss López, Boris (BENTHAM SCIENCE PUBL LTD, 2001-03)
      The structural elucidation of complex organic molecules relies heavily on the application of proton detected heteronuclear NMR. Among these techniques, the HMBC NMR experiment is probably the most useful 2D NMR method The ...
    • Very long-range correlations ((n)J(C,H) n > 3) in HMBC spectra 
      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 ...