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Search Results: 1 - 10 of 58741 matches for " David; Vicente Murillo "
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Caracterización preliminar del aceite obtenido del fruto completo de Roystonea regia (Kunth) O. F. Cook
Rodríguez Leyes,Eduardo A.; González Canavaciolo,Víctor L.; Marrero Delange,David; Adames Fajardo,Yuliamny; Vicente Murillo,Roxana;
Revista Cubana de Plantas Medicinales , 2008,
Abstract: introduction: the cuban royal palm tree oil, roystonea regia (kunth) o.f. cook, has possibilities to be used as raw material in the cuban pharmaceutical industry. objectives: to characterize the cuban royal palm tree oil and to study its fatty acid composition. methods: the official methods described in usp 27 were used and the composition of fatty acids was estimated by gas chromatography. results: relative density was 0.874 - 0.970 g/ml; refraction index 1.454 - 1.463; the saponification index ranged 190.0 to 221.8; the acidity index ranged 5.2 to 26.4; iodine index was 49.2 to 55.8; and the contents of non-saponificable material ranged 2.0 to 13.4 %. the total of fatty acids in the analyzed oils varied from 74.4 to 89.4 %. the composition of fatty acids standardized at 100 % was given by the following concentrations: c8:0 y c10:0 (0.1-0.9 %); c12:0 (17.9-27.8 %); c14:0 (9.3-12.7 %); c16:0 (9.3-15.0 %); c16:1 (0.1-0.6 %); c18:0 (2.5-3.7 %); c18:1 (27.3-37.3 %); c18:2 (12.8-17.4 %); y c18:3 (0.1-0.5 %). conclusions: some of the physical and chemical characteristics of r. regia fruit oil were studied in this paper.
Contenidos de aceite y de los ácidos láurico y mirístico en frutos maduros de Roystonea regia colectados durante dos a?os
Rodríguez Leyes,Eduardo A.; González Canavaciolo,Víctor L.; Marrero Delange,David; Adames Fajardo,Yuliamny; Vicente Murillo,Roxana;
Revista Cubana de Plantas Medicinales , 2010,
Abstract: introduction: d004, an promissory active ingredient in treatment and prevention of begnin prostatic hyperplasia, is obtained from the fruit oil of roystonea regia (kunth) o.f. cook. it is composed by a mixture of free fatty acids including lauric and myristic acids, both very important by their pharmacological effects. objective: to determine the potential influence of harvest season on the oily content and the concentration of lauric and myristic acids from r. regia fruits. methods: each month for two years, it was possible to collect mature fruits from r. regia in a selected group. in dry and milled samples it was determined the oily content in a gravimetric way and that of fatty acids by gas chromatography. results: there were differences statistically significant in oily contents and of lauric and myristic acids; however, the contents determined in all the cases remained within the quality specifications established for the plant material. conclusions: the plant material collected for all the year may be used in obtaining of r. regia oil, raw material used in the production of d004.
Determinación de alcoholes grasos en el ingrediente activo D004 por cromatografía de gases-espectrometría de masas
Marrero Delange,David; Rodríguez Leyes,Eduardo Antonio; González Canavaciolo,Víctor Luis; Adames Fajardo,Yuliamny; Vicente Murillo,Roxana;
Revista Cubana de Plantas Medicinales , 2012,
Abstract: introduction: d004, a new lipid extract purified from the cuban royal palm (roystonea regia [kunth] f. cook) fruits, has been shown to be effective in experimental models of prostate hyperplasia, and to exhibit antioxidant and anti-inflammatory effects. objectives: to identify the fatty alcohols that could be present in d004 active ingredient using gas chromatography-mass spectrometry. methods: samples of nine batches of d004 were submitted to saponification with koh/etoh solution and the unsaponifiable fractions were extracted with n-hexane. the alcohols were analyzed as trimetilsilil derivatives, which were obtained by reaction with mstfa. the quantification was carried out by the internal standard method using 1-eicosanol. results: the total content of alcohols in d004 ranged from 0.18 to 5.10 %. this fraction was mainly composed of 1-octacosanol (52.94 %), 1-triacontanol (25.91 %), and 1-hexacosanol (14.40 %); whereas the minority components were 1-docosanol, 1-tricosanol, 1-tetracosanol, 1-pentacosanol, 1-heptacosanol, 1-nonacosanol, 1-dotriacontanol 1-tetratriacontanol, 1-tetradecanol, 1-pentadecanol, 1-hexadecanol, 1-octadecanol and 1-eicosanol were minor components, being the last six alcohols present in trace levels. conclusions: fatty alcohols were identified and quantified in d004 active ingredient by gas chromatography-mass spectrometry. the major components were 1-octacosanol, 1-triacontanol and 1-hexacosanol.
Estudios preliminares de estabilidad de un extracto lipídico de los frutos de Roystonea regia en frascos de vidrio ámbar
Sierra Pérez,Roxana de la Caridad; Rodríguez Leyes,Eduardo Antonio; González Canavaciolo,Víctor Luis; Marrero Delange,David; Vicente Murillo,Roxana;
Revista Cubana de Farmacia , 2010,
Abstract: the d004 is a new active ingredient extracted from the cuban real palm (roystonea regia), promising in the treatment of the benign prostatic hyperplasia. to determine its stability in amber glass flasks studies were conducted where samples underwent different conditions. in stress situations d004 is sensitive to the thermal and oxidative degradation. under accelerated conditions (40 ± 2 oc ad 75 ± 5 % of relative humidity) there weren't significant changes in any assessed parameters during 12 months allowing predicting a useful life time of at least 2 years under less drastic conditions. it was corroborated under climatic conditions ii (25 ± 2oc and 60± 5% of relative humidity and iv (30 ± 2 oc and 70 ± 5 % of relative humidity).
Estudio de estabilidad acelerada del ingrediente activo D-004 en diferentes envases
Rodríguez Leyes,Eduardo A.; Sierra Pérez,Roxana C.; González Canavaciolo,Víctor L.; Marrero Delange,David; Vicente Murillo,Roxana;
Revista Cubana de Plantas Medicinales , 2009,
Abstract: introduction: d-004 is a new active ingredient under research and development stage, which is obtained from roystonea regia (kunth) o. f. cook fruits. objective: to precise over the d-004 stability under accelerated conditions in amber glass, polyethylene terephtalate and high density polyethylene containers. methods: samples from three batches were stored at (40 ± 2) oc and (75 ± 5) % relative humidity for 12 months. organoleptic characteristics, relative density, refractive index (usp 27) and fatty acids content by gas chromatography, were determined. results: measured parameters were within the set quality specifications , except for fatty acids content that significantly decreased in polyethylene terephtalate and high density polyethylene containers after 3, 4 and a half and 6 months, respectively. conclusions: the amber glass protects more d-004 from degradation than the analyzed plastic containers.
CREANDO UNA BIBLIOTECA DURANTE LA REGENERACIóN: LA INICIATIVA DEL INSTITUTO LITERARIO DE CALI EN 1892
Murillo Sandoval,Juan David;
Historia Crítica , 2011,
Abstract: this article analyzes the reception of the instituto literario's iniciative to create a public library in cali during the regeneration. to do so, it examines brief public statements as well as various book donations, which are useful to understand the cultural climate of the period and the dynamics of urban literary consumption. it also explores how women and other social groups responded to the initiative. the article concludes by looking at the role of the interational book market in promoting certain tendencies, titles, and authors.
Creando una biblioteca durante la Regeneración: la iniciativa del Instituto Literario de Cali en 1892
Juan David Murillo Sandoval
Historia Crítica , 2011,
Abstract: This article analyzes the reception of the Instituto Literario's iniciative to create a public library in Cali during the Regeneration. To do so, it examines brief public statements as well as various book donations, which are useful to understand the cultural climate of the period and the dynamics of urban literary consumption. It also explores how women and other social groups responded to the initiative. The article concludes by looking at the role of the interational book market in promoting certain tendencies, titles, and authors.
The mbo Operon Is Specific and Essential for Biosynthesis of Mangotoxin in Pseudomonas syringae
Víctor J. Carrión, Eva Arrebola, Francisco M. Cazorla, Jesús Murillo, Antonio de Vicente
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0036709
Abstract: Mangotoxin is an antimetabolite toxin produced by certain Pseudomonas syringae pv. syringae strains. This toxin is an oligopeptide that inhibits ornithine N-acetyl transferase, a key enzyme in the biosynthesis of ornithine and arginine. Previous studies have reported the involvement of the putative nonribosomal peptide synthetase MgoA in virulence and mangotoxin production. In this study, we analyse a new chromosomal region of P. syringae pv. syringae UMAF0158, which contains six coding sequences arranged as an operon (mbo operon). The mbo operon was detected in only mangotoxin-producing strains, and it was shown to be essential for the biosynthesis of this toxin. Mutants in each of the six ORFs of the mbo operon were partially or completely impaired in the production of the toxin. In addition, Pseudomonas spp. mangotoxin non-producer strains transformed with the mbo operon gained the ability to produce mangotoxin, indicating that this operon contains all the genetic information necessary for mangotoxin biosynthesis. The generation of a single transcript for the mbo operon was confirmed and supported by the allocation of a unique promoter and Rho-independent terminator. The phylogenetic analysis of the P. syringae strains harbouring the mbo operon revealed that these strains clustered together.
Chemical Composition of Ground Pearl (Eurhizococcus colombianus) Cysts
Winston Qui?ones,Bernardo Vicente,Fernando Torres,Rosendo Archbold,Walter Murillo,Martha Londo?o,Fernando Echeverri
Molecules , 2008, DOI: 10.3390/molecules13010190
Abstract: Ground pearl (Eurhizococcus colombianus) is a crop pest in Colombia, withspecial impact on fig, grass, rubus and tomato plants. The insect is resistant to externalinsecticide application because it produces a thick waxy shell that isolates it from theenvironment. The composition of this shell was determined by NMR and MS as atriglyceride, whose fatty acid is transformed into other products with the metamorphosis ofthe insect. Additionally, several enzymatic inhibitors were assayed to control the insectwith negative results.
The Hilali Conjecture for hyperelliptic spaces
Javier Fernandez de Bobadilla,Javier Fresan,Vicente Mu?oz,Aniceto Murillo
Mathematics , 2012,
Abstract: The Hilali Conjecture predicts that for a simply-connected elliptic space, the total dimension of the rational homotopy does not exceed that of the rational homology. Here we give a proof of this conjecture for a class of elliptic spaces known as hyperelliptic.
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