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Mostrando ítems 17507-17526 de 19114
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Synthesis and Evaluation of Aromatic Surfactants as Potential Antibacterial and Cytotoxic Agents
(2019-01)Two ether and one ester derivatives of the 4-nitro-3-hydroxybenzoic acid were synthesized and characterized. The in vitro antimicrobial and cytotoxic activities of the three novel compounds were also evaluated. The ... -
Synthesis and preliminary determination of antibacterial activity of some 1,3-enynes
(2019)The synthesis of five 1,3-enynes was performed and its activity against Gram-positive and Gram-negative bacteria was determined. -
Synthesis of 2-hydroxy-3-substituted naphthoquinones using the Heck reaction
(2007-06)An efficient Heck coupling of 2-hydroxy-3-iodo-naphthoquinone with a series of electron-deficient alkenes in aqueous solution has been accomplished. The method is characterized by simple conditions and facile work-up to ... -
Synthesis of Iodinated Naphthoquinones Using Morpholine-Iodine Complex
(Synthetic Communications Vol. 34, No. 18, pp. 3389–3397, 2004, 2004)The efficient synthesis of 2‐hydroxy‐3‐iodo‐1,4‐naphthoquinone (3), 2‐amino‐3‐iodo‐1,4‐naphthoquinone (4), and 2‐iodo‐1,4‐naphthoquinone (5) have been developed using the parent naphthoquinone in combination with the ... -
Synthesis of N-[3-(prop-1-yn-1-yl)phenyl] benzene sulfonamide and Determination of its Antibacterial Activity
(2019-07-25)The synthesis of N-[3-(prop-1-yn-1-yl)phenyl] benzenesulfonamide was performed and its antibacterial activity against Staphylococcus aureus and Escherichia coli was determined. Minimalinhibitory concentrations (MIC) of ... -
Synthesis, structure and spectroscopic characterization of Ni(II), Co(II), Cu(II) and Zn(II) complexes with saccharinate and pyrazole
(2007-09)Four mononuclear mixed-ligand complexes of Co(II), Ni(II), Cu(II) and Zn(II), with saccharin (sac) and pyrazole (Hpz) were synthesized and characterized on the basis of elemental analysis, FT-IR spectroscopy, magnetic ... -
Synthetic peptides derived from the C-terminal region of Lys49 phospholipase A2 homologues from Viperidae snake venoms: biomimetic activities and potential applications
(2010)Lys49-phospholipase A2 homologues constitute a large family of toxins present in the venoms of viperid snake species, which despite lacking catalytic activity, cause significant skeletal muscle necrosis. The main structural ... -
Systematics and biogeography of Pleurobranchus Cuvier, 1804, sea slugs (Heterobranchia: Nudipleura: Pleurobranchidae)
(2015)Species of Pleurobranchus (Mollusca: Gastropoda: Heterobranchia: Nudipleura: Pleurobranchidae) are commonly found worldwide, but there is a substantial amount of confusion regarding the ranges and identification of individual ... -
Systematics, taxonomy, and distribution of Myriogenospora G.F. Atk. (Clavicipitaceae, Hypocreales, Ascomycota)
(2019-09-06)Based on new specimens of Myriogenospora spp. from Costa Rica and Panama, we present morphological analyses, systematic conclusions, additions to host ranges, and geographical distribution data for the two species currently ... -
Systemic and local myotoxicity induced by snake venom group II phospholipases A2: Comparison between crotoxin, crotoxin B and a Lys49 PLA2 homologue
(2008-01)The patterns of myotoxicity induced in mice by crotoxin, crotoxin B and a Lys49 phospholipase A2 (PLA2) homologue were compared. Lys49 PLA2-induced local myotoxicity is reflected by creatine kinase (CK) loss in injected ... -
Systemic cytokine response in children bitten by snakes in Costa Rica
(2001-12)BACKGROUND: To characterize the host response to venom from snakes of the family Viperidae in Costa Rica, we investigated the release of cytokines: IL-1, IL-6, IL-8, TNF-alpha, MIP-1beta, and RANTES in pediatric patients ... -
Systemic effects induced by the venom of the snake Bothrops caribbaeus in a murine model
(2013-03)Snakebite envenoming by Bothrops caribbaeus, an endemic viperid from the Lesser Antillean island of Saint Lucia, is clinically characterized by local tissue damage and systemic thrombosis that can lead to cerebral, myocardial ... -
Systems Analysis in Nutrition and Health Planning: Approximate Model Relating Birth Weight and Age to Risk of Deficient Growth
(1976)This paper summarizes the initial phase of an effort to develop semiquantitative methods for nutrition and health planning. The general approach is to utilize the methods of systems analysis and operations research where ... -
Szondi, Berman y la Frühromantik: como un mémoire
(2021-06-17)Este artículo presenta algunas líneas de continuidad entre poesía contemporánea, crítica contemporánea y estudio de la Frühromantik. Se evidencian además los presupuestos teóricos comunes a la traductología de Antoine ... -
Tabaquismo en la mujer costarricense, 1984-85
(1987)En este artículo se analizan los resultados de una encuesta con representatividad nacional de 870 mujeres costarricenses de 25 a 59 años de edad, entrevistadas entre 1984 y 1985. El 14 por ciento de las entrevistadas ... -
Tabla de composición bromatológica de forrajes utilizados para la alimentación de animales en Costa Rica
(2020)El conocimiento de la composición bromatológica de un forraje es de suma importancia para la elaboración de dietas correctamente balanceadas en la alimentación de animales domésticos, principalmente rumiantes. El aporte ... -
Tabla de Composición de Materias Primas Usadas en Alimentos para Animales: 2011
(2011-08)Esta tabla de composición de materias primas usadas en los alimentos para animales de Costa Rica se genera a partir de una base de datos almacenados desde 1985, en el Centro de Investigaciones en Nutrición Animal (CINA) ... -
Tabla de Composición de Materias Primas Usadas en Alimentos para Animales: 2017
(2017)En esta segunda edición de las Tablas de Composición de Materias Primas usadas en Alimentos para Animales, se actualizan los datos de composición de la química húmeda, que corresponden a las fracciones del análisis proximal, ... -
Tacaco (Sechium tacaco): cosecha de esquejes
(2022-07-21)Se observa a una persona durante la cosecha de varios esquejes de tacaco. -
Tacaco (Sechium tacaco): entrevista a José Araya, en Santiago, Paraíso, Cartago, Costa Rica
(2022-07-13)Se entrevista al productor de tacaco, José Araya, quien tiene su finca en Santiago, Paraíso, Cartago, Costa Rica. Él comenta sobre diversos aspectos del cultivo de esta hortaliza.