Browsing by Author "c0f6d337-8b1c-4f61-95aa-d89dce5b1e44"
Now showing items 1-20 of 33
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Garrido, C.; Aliaga, A. E.; Gómez Jeria, Juan; Clavijo Campos, Ernesto; Campos Vallette, Marcelo; Sánchez Cortés, S. (JOHN WILEY & SONS LTD, 2010-01-18)The MRKDV peptide structurally associated with an immunomodulatory protein, as well as model peptides ADEDRDA and LGRGISL with common amino acid residues were studied using surface enhanced Raman scattering (SERS) supported ...
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Leyton, Patricio; Gómez Jeria, Juan; Sánchez Cortés, S.; Domingo, C.; Campos Vallette, Marcelo (American Chemical Society, 2006-03-16)In this work surface-enhanced resonance Raman spectroscopic experiments have demonstrated that metallic single-walled carbon nanotubes can be used as chemical assemblies between the pyrene analyte and the silver colloidal ...
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Campos Vallette, Marcelo; Cornejo, Luis; Osorio, Daniela; Uribe, Mauricio; Llanos, Carolina; Castillo, Camila (Universidad de Tarapacá, 2018-02-23)Un conjunto de dataciones, síntesis de excavaciones y análisis de materiales asociados de la cuenca alta del valle de Azapa, en torno al río Tignamar (2.800 - 3.800 msm) nos permiten discutir la ocurrencia de procesos ...
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Characterization of sodium alginate and its block fractions by surface-enhanced Raman spectroscopy Campos Vallette, Marcelo; Chandía, Nancy P.; Clavijo Campos, Ernesto; Leal, David; Matsuhiro, Betty; Osorio Román, Igor; Torres, Simonet (JOHN WILEY & SONS LTD, 2009-10-23)The surface-enhanced Raman scattering (SERS) of sodium alginates and their hetero- and homopolymeric fractions obtained from four seaweeds of the Chilean coast was studied. Alginic acid is a copolymer of β-D-mannuronic ...
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Garrido, C.; Aguayo, T.; Clavijo Campos, Ernesto; Gómez Jeria, Juan; Campos Vallette, Marcelo (John Wiley & Sons, 2013)Raman and surface enhanced Raman scattering (SERS) spectroscopies were used to study the pH effect (7 to 9) on the interaction of arginine (Arg) with colloidal Ag nanoparticles (AgNps). A new methodology was implemented ...
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Guerrini, L.; Aliaga, A. E.; Cárcamo, J.; Gómez Jeria, Juan; Sánchez Cortés, S.; Campos Vallette, Marcelo; García Ramos, J. V. (ELSEVIER, 2008-08-29)Organochlorine pesticide endosulfan has been detected for the first time by using surface-enhanced Raman scattering (SERS) at trace concentrations. The bis-acridinium dication lucigenine was successfully used as a molecular ...
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Leyton, Patricio; Córdova, I.; Lizama Vergara, P. A.; Gómez Jeria, Juan; Aliaga, A. E.; Campos Vallette, Marcelo; Clavijo Campos, Ernesto; García Ramos, J. V.; Sánchez Cortés, S. (ELSEVIER, 2008-03-11)A humic acid (HA) extracted from lignite was successfully used in surface-enhanced Raman scattering SERS experiments as molecular occlusion assembler deposited onto a Ag colloidal surface to detect the polycyclic aromatic ...
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Celis, Freddy; Tirapegui, Cristian; García, Macarena; Aracena, Andrés; Aliaga, Álvaro E.; Campos Vallette, Marcelo (Soc. Chilena Química, 2020)A green ancient thread sample from a Chilean mummy turban was analyzed by plasmon-enhanced Raman scattering spectroscopy using a direct drop-colloidal method. The enhanced-Raman signals in the sample are associated with ...
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Garrido, C.; Aliaga, Avaro E.; Gómez Jeria, Juan; Cárcamo, José J.; Clavijo Campos, Ernesto; Campos Vallette, Marcelo (Elsevier B.V., 2012-01-16)The Raman and surface-enhanced Raman scattering (SERS) spectra of the C-terminal peptide of pigeon cytochrome C (PCC87-104), were recorded. This peptide is widely used to study the immune response in vivo. Hydrophobicity ...
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Vera, A. M.; Cárcamo, J. J.; Aliaga, A. E.; Gómez Jeria, Juan; Kogan Bocian, Marcelo; Campos Vallette, Marcelo (Elsevier, 2015)In a previous work we demonstrated that toxic aggregates of the protein b-amyloid (ATAb) involved in the Alzheimer’s disease (AD) can be destabilized upon electromagnetic irradiation of the peptide Cys- Leu-Pro-Phe-Phe-Asp ...
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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 ...
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Ogalde, Juan Pablo; Arriaza, Bernardo; Paipa, Carolina; Leyton, Patricio; Campos Vallette, Marcelo; Lara, Nelson; Salas, Cristian; Tapia, Pedro (Interciencia, 2015)This paper reports on an unknown yellowish mineral compound found in an archaeological context from Chorrillos cemetery (Calama, Chile) dating to the Early Formative period (800 - 200 B.C.). We used optic microscopy, SEM, ...
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Aguayo, T.; Garrido, C.; Clavijo Campos, Ernesto; Gómez Jeria, Juan; Araya Monasterio, C.; Icaza, M.; Espinoza Moraga, F.; Campos Vallette, Marcelo (John Wiley & Sons, 2013)The Raman and surface enhanced Raman scattering (SERS) spectra of a black dyed silk sample (BDS) were registered. The spectral analysis was performed on the basis of Raman and SERS spectral data of isolated samples of ...
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Celis, Freddy; Campos Vallette, Marcelo; Cárcamo Vega, José; Gómez Jeria, Juan; Aliaga, Carolina (Soc Chilena Quimica, 2015)The sensor 1-(4-mercaptophenyl)-2,4,6-triphenylpyridinium perchlorate compound was vibrationally characterized using Raman and the Surface-Enhanced Raman techniques, SERS and Shell-Isolated Nanoparticles-Enhanced Raman ...
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Cárcamo, José J.; Aliaga, Aalvaro E.; Clavijo Campos, Ernesto; Brañes, M.; Campos Vallette, Marcelo (Johm Wiley, 2012)Important improvements of diseases of the rotator cuff supraspinatus tendons are seen after shock wave (SW) treatment. Neo-angiogenesis stimulation and hypercellularization result from short periods of treatment. The present ...
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Rodríguez Gacitúa, Camila; Campos Vallette, Marcelo; Celis Bozo, Freddy (Sociedad Chilena Química, 2016)The main pigments in the painting by the Chilean artist Ignacio Gumucio were identified by using micro-Raman spectroscopy. Three works by the artist, two paintings with wooden stand and a wall painting were analyzed. ...
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Sepúlveda, Marcela; Gutiérrez, Sebastián; Cárcamo Vega, José; Surco Luque, Julio; Campos Vallette, Marcelo; Guzmán, Fernando; Conti, Paola; Pereira, Magdalena; Rúa, Carlos (Mimesis Edizioni, 2017)Micro-Raman spectroscopy was used to analyze and identify pigments and determine the palette of color in wall paintings from four churches of the Colonial Period, in the Bolivian highlands. The ancient churches Santiago ...
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Corales, Guillermo; Celis, Freddy; Gómez Jeria, Juan; Campos Vallette, Marcelo; Cárcamo Vega, José (Taylor & Francis, 2017)Raman, surface-enhanced Raman scattering, and shell isolated nanoparticles-enhanced Raman scattering techniques were used to study the indigo-nanoparticle interaction nature. Silver nanoparticles were employed with and ...
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Aguayo, T.; Clavijo Campos, Ernesto; Villagrán, A.; Espinosa, F.; Sagüés, F. E.; Campos Vallette, Marcelo (SOC CHILENA QUIMICA, 2010-08-18)Seven pigments of patrimonial interest for the Chilean artwork were analyzed by means of Raman spectroscopy by using the 632.8 nm excitation laser line. Samples were supplied by the National Center of Conservation and ...
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Leyton, Patricio; Domingo, C.; Sánchez Cortés, S.; Campos Vallette, Marcelo; Díaz, G. F.; García Ramos, J. V. (2007)A vibrational study of the calix[4]arene derivative 25,26,27,28-tetracarboethoxy-p-tert-butylcalix[4]arene (TCEC) is accomplished in this work. This characterization implies a study of its adsorption on metal (Cu and Ag) ...