Browsing by Title Facultad de Ciencias
Now showing items 6720-6739 of 8156
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(Blackwell Munksgaard, 1996)Boldine (5,6,6a,7-tetrahydro-1,10-dimethoxy-6-methyl-4H-dibenzo[de,g]quinoline-2,9-diol) is an aporphine alkaloid noted for its antioxidant properties. A salient feature of the molecule is the non-planarity of the biphenyl ...
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(1992)S-O stretching force constants in a series of synmetrical sulfoxide compounds were calculated from quantum chemical methods. Molecular geometries were obtained from experimental data and from MNDO and PM3 calculations. S-O ...
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(Marcel Dekker, Inc., 2001-09-18)The preparation of the sulfoxides and the sulfones of two centrally active alkylthioamphetamine salts, ( )-1-(4-methylthiophenyl)- 2-aminopropane hydrochloride (2) (MTA HCl) and ( )-1-(2,5-dimethoxy-4-ethylthiophenyl ...
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(1996)The reaction of CpFe(dppe)l with disulphides S2R2 R = CH3, C3H7, CH2-C6H5, C6H5 in presence of NH4PF6 afford the unexpectedly oxidized thiolate complexes [CpFe(dppe)SR]PF6 instead the expected disulphide complexes. The ...
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(2005)In voltage-dependent channels, positive charges contained within the S4 domain are the voltage-sensing elements. The "voltage-sensor paddle" gating mechanism proposed for the KvAP K+ channel has been the subject of intense ...
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(Universidad de Chile. Facultad de Ciencias Sociales. Departamento de Antropología, 2018)En este artículo presentamos nuevos conocimientos sobre costumbres fumatorias en tres regiones geográficoculturales de Chile, en que las evidencias de prácticas de fumar en pipas se constatan, con cierto desfase cronológico, ...
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(Universisdad de Chile, 2005)Los transportadores de nucleótidos azúcar (TNA) son proteínas que permiten la entrada de estos sustratos que participan en la síntesis de glicoproteinas, glicolipidos y polisacáridos en el aparato de goli. La levadura ha ...
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(2003)A large solid angle low-Z charged particle detector system was built in order to improve the quality of the identification and selection of evaporation channels for in-beam γ-spectroscopy measurements. The array consists ...
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(Universisdad de Chile, 1987)Durante el desarrollo de esta tesis se observo que diversas gramineas silvestres servían de hospederos a los afidos de los cereales y que algunas pocas especies no eran atacadas por estos insectos habiéndose encontrado que ...
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(PEERJ, 2020)Carotenoids are essential components of the photosynthetic antenna and reaction center complexes, being also responsible for antioxidant defense, coloration, and many other functions in multiple plant tissues. In tomato, ...
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(Elsevier, 2017)Pathogenic Salmonella strains have a set of virulence factors allowing them to generate systemic infections and damage in a variety of hosts. Among these factors, bacterial proteins secreted by specialized systems are used ...
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(2012)Dopamine (DA) condenses, at least in vitro, with acetaldehyde, the primary metabolite of ethanol, to form the regioisomers salsolinol (SAL) and isosalsolinol (isoSAL). An alternative in vivo route to SAL, requiring a ...
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(Elsevier, 2020)Point counts are widely used to assess bird diversity. However, this method has some limitations and can be affected by observer bias. For this reason, it is commonly complemented with other methods (e.g., mist-nets, sound ...
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(1992)A new asterosaponin, named santiagoside (1), has been isolated from the Antarctic starfish Neosmilaster georgianus and, its structure elucidated on the basis of extensive spectroscopic experiments and chemical correlations. ...
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(Universidad de Chile., 1978)De la hidrolisis acida de los glicosidos crudos de frutos de Phytolacca dioica (ombú) se han aislado dos triterpenos: Aglicona-A,C37H48O6 y Aglicona -B, C31H48O7; sus propiedades espectroscópica, asi como las de sus ...
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(WILEY-BLACKWELL PUBLISHING, INC,, 2008-11)The blood of 21 adult South American mouse opossums (Thylamys elegans) captured from April through August of 2005 in central Chile was examined for parasites. Light microscopic analysis of blood smears initially suggested ...
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(BLACKWELL, 2008-12)The blood of 21 adult South American mouse opossums (Thylamys elegans) captured from April through August of 2005 in central Chile was examined for parasites. Light microscopic analysis of blood smears initially suggested ...
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(Elsevier, 2020)Sarcoptic mange has been anecdotally reported in Chilean wildlife during the last decade. Although thisdisease can have devastating outcomes for biodiversity, there is no comprehensive assessment of thispotential threat ...
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(American Physical Society, 2018)© 2018 American Physical Society. We examine a one-dimensional linear waveguide array containing a single saturable waveguide. By using the formalism of lattice Green functions, we compute in closed form the localized mode ...
