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Comparación de mieles producidas por la abeja yateí (Tetragonisca fiebrigi) en Argentina y Paraguay Comparison of honeys produced by the bee yateí (Tetragonisca fiebrigi) in Argentina and Paraguay
Patricia Vit,María Gabriela Gutiérrez,Antonio Jesús Rodríguez-Malaver,Greana Aguilera
Acta bioqu?-mica cl?-nica latinoamericana , 2009,
Abstract: Tetragonisca fiebrigi Schwarz 1938 es una abeja sin aguijón conocida como yateí en Argentina y Paraguay. Al igual que otras especies de Meliponini, esta abeja nativa produce miel en botijas, con acidez y humedad más elevadas que los requisitos en mieles de Apis mellifera L. Se compararon 16 muestras de miel de T. fiebrigi producidas en la provincia de Misiones, Argentina y en el departamento de Itapuá, Paraguay según su contenido de humedad por refractometría, el color instrumental, la capacidad antioxidante en equivalentes de Trolox (TEAC) con el método del catión radical ABTS.+, el contenido de flavonoides con el cloruro de aluminio y el de polifenoles totales con el reactivo Folin Ciocalteu, y la actividad antibacteriana. Las propiedades de las mieles de Argentina y Paraguay variaron como se indica a continuación en color (107,18±19,40 y 100,40±15,47 mm Pfund), contenido de humedad (23,89±1,74 y 23,68±0,78 g agua/100 g miel), flavonoides (14,37±11,11 y 12,66±4,82 mg EQ/100 g miel), polifenoles (240,74±94,05 y 148,29±17,75 mg EAG/100 g miel) y TEAC (160,15±60,50 y 120,91±38,67 mymoles equivalentes Trolox/100 g miel). El color, la humedad, los contenidos de flavonoides y de polifenoles no variaron significativamente según el origen geográfico de las mieles, pero la TEAC fue mayor en las mieles argentinas que en las paraguayas. La concentración inhibitoria mínima de miel fue mayor contra Escherichia coli (50 g/100 mL) que contra Staphylococcus aureus (6,25 a 50 g/100 mL). Esta caracterización de mieles de yateí es una contribución para sugerir sus estándares de calidad. Tetragonisca fiebrigi Schwarz 1938 is a stingless bee named yateí in Argentina and Paraguay. As well as other Meliponini species, this native bee stores honey in pots with acidity and moisture higher than the Apis mellifera L. honey standards. Sixteen T. fiebrigi honey samples produced in the county of Misiones, Argentina, and Itapuá department, Paraguay were compared according to their Trolox equivalent antioxidant capacity (TEAC) by the method of the radical cation ABTS.+, flavonoid with aluminium chloride and total polyphenols contents with the Folin-Ciocalteu reagent. The properties between honeys from Argentina and Paraguay varied as follows in color (107.18±19.40 and 100.40±15.47 mm Pfund), moisture (23.89±1.74 and 23.68±0.78 g water/100 g honey), flavonoids (14.37±11.11 and 12.66±4.82 mg QE/100 g honey), poliphenols (240.74±94.05 and 148.29±17.75 mg GAE/100 g honey), and TEAC (160.15±60.50 and 120.91±38.67 mumoles Trolox equivalents/100 g honey). The color, moisture, flavonoid and
Mieles checas categorizadas según su actividad antioxidante
Vit,Patricia; Gutiérrez,María Gabriela; Titera,Dalibor; Bednar,Michael; Rodríguez-Malaver,Antonio Jesús;
Acta bioqu?-mica cl?-nica latinoamericana , 2008,
Abstract: the bioactivity of honey has been used in traditional and modern apitherapy. the botanical origin of honey causes variations in this product's active principles and color, from almost colorless whitish to dark brown in the amber scale. the total antioxidant activity (taa) of 50 honeys sent to the service of chemical analysis of the institute of apicultural investigations in dol, czech republic, was evaluated by the method of the radical cation abts·+. the following variations of aat (μmols trolox equivalent) were found for 22 floral honeys (60.12-287.55), 15 honeydew honeys (53.71-280.04) and 13 mixed honeys (43.55-290.35). the taa did not vary significantly according to the botanical origin but was directly proportional to color and content of flavonoids and polyphenols. a classification of honey according to its low, medium and high taa is suggested.
INTOXICACION POR HERBICIDA Y EL USO DE LA TIAMINA. UN ESTUDIO EXPERIMENTAL
Pérez-Pérez Elizabeth,Calderón de Cabrera Lourdes,Rodríguez-Malaver Antonio,Dmitrieva Natalia
Salud, Arte y Cuidado , 2012,
Abstract: Pesticide poisoning, accidental or intentional self-poisoning is a signi cant problem in many parts of the developing world. Paraquat is a compound that has been widely used as a non-selective contact herbicide since 1962. Ingestion of paraquat is a signi cant method ofself-poisoning in parts of Asia, Paci c islands, and Caribbean. Ingestion of large amounts is considered to be uniformly fatal, resulting in death from multi-organ; however, in smaller quantities, paraquat is speci cally taken up into and accumulates in the lung, and the redox cycling and free radical generation triggers a eutrophil-mediated in ammatory response in the lungs which initiates an irreversible brotic process that kills the majority of patientswithin several weeks. In this work, was studied the ability of thiamine to protect against Paraquat (PQ)-induced mortality and oxidative damage in rat liver. The medial lethal dose (LD50) for PQ was 32 mg/kg of body weight within 48 h. When thiamine (100 mg/kg) wasadministrated to PQ-treated rats, mortality was not observed. However, thiamine at 200 mg/kg did not modify mortality. For the oxidative stress study, the liver was obtained 24 h after Q-treatment and thiobarbituric acid reactive ubstances (TBARS) were measured.PQ induced a signi cant increase in TBARS levels and thiamine prevented this increase
Comparación de mieles producidas por la abeja yateí (Tetragonisca fiebrigi) en Argentina y Paraguay
Vit,Patricia; Gutiérrez,María Gabriela; Rodríguez-Malaver,Antonio Jesús; Aguilera,Greana; Fernández-Díaz,Cecilia; Tricio,Aída Ester;
Acta bioqu?-mica cl?-nica latinoamericana , 2009,
Abstract: tetragonisca fiebrigi schwarz 1938 is a stingless bee named yateí in argentina and paraguay. as well as other meliponini species, this native bee stores honey in pots with acidity and moisture higher than the apis mellifera l. honey standards. sixteen t. fiebrigi honey samples produced in the county of misiones, argentina, and itapuá department, paraguay were compared according to their trolox equivalent antioxidant capacity (teac) by the method of the radical cation abts.+, flavonoid with aluminium chloride and total polyphenols contents with the folin-ciocalteu reagent. the properties between honeys from argentina and paraguay varied as follows in color (107.18±19.40 and 100.40±15.47 mm pfund), moisture (23.89±1.74 and 23.68±0.78 g water/100 g honey), flavonoids (14.37±11.11 and 12.66±4.82 mg qe/100 g honey), poliphenols (240.74±94.05 and 148.29±17.75 mg gae/100 g honey), and teac (160.15±60.50 and 120.91±38.67 mmoles trolox equivalents/100 g honey). the color, moisture, flavonoid and polyphenol contents did not vary significantly according to the geographical origin, but the teac was higher in the honeys from argentina than in those from paraguay. this characterization of yateí honey is a contribution to suggest its quality standards.
Composición química y capacidad antioxidante en fruta, pulpa y mermelada de guayaba (Psidium guajava L.)
Marquina,V; Araujo,L; Ruíz,J; Rodríguez-Malaver,A; Vit,P;
Archivos Latinoamericanos de Nutrición , 2008,
Abstract: (psidium guajava l.) fruit, pulp and jam. guava (psidium guajava l.) is a tropical fruit widely relished in the tropics, consumed fresh and processed. in this work, free acidity, ph, ash, nitrogen and water contents were measured, besides the total polyphenol content and the antioxidant capacity of the peel, the shell and the pulp of the fresh fruit and the processed guava pulp and jam. the highest phenolic content was found in the guava skin la (10,36 g/100 g skin) and the lowest in the jam (1,47 g/ 100 g jam), in dry weight. the antioxidant capacity of the skin was 10 times higher than that of the pulp, and the jam was twice that of the shell.
Un perfil de las capacidades tecnológicas en la industria de artes gráficas, imprentas y editoriales
Malaver Rodríguez,Florentino;
Innovar , 2002,
Abstract: the text uses a study of companies in the graphical arts' industry to show how (contrary to that indicated by studies based on cumulative figures from industry) the dynamics of technical change represented by the irruption of digital technology, and its convergence with information and communication technology, has provoked profound transformation in this industry. the most significant changes have happened in terms of integration amongst the graphical, communication and entertainment industries; inter-entrepreneurial relationships and their morphology; and job and work competitivity. the article argues that demand and the search for commercial opportunities within a micro-environment have stimulated informal learning, thus forging the capacity to adapt and adopt improved techniques and to innovate. the absence of formal technological management and innovation arising from r&d activities marks the limits of such technological capacity. however, for some leading companies, the speed at which they identify, incorporate and exploit new technologies fulfils a strategic function, representing the source of competitive advantages in their markets.
El despegue de la investigación colombiana en administración: análisis de sus avances en el período 2000-2006
Malaver Rodríguez,Florentino;
Cuadernos de Administración , 2006,
Abstract: this paper looks into the degree of progress made in administration research in colombia in the past ten years, and more specifically from 2000 to 2006. the progress is evaluated using notions from both institutional and resource perspectives, the research groups? analytical capabilities, and indexed administration journals. to establish the development of the research groups, the indicators used were track record and production quantity and quality. for the journals, the indicators were indexing level and ambit. information was gathered from four databases: the research group database gruplac, the national indexed journal database and the database of international journals homologated in the colombian publindex, and the journal citation index. study results for the period under study show that, on one hand, research increased as did the research groups? products in both quantity and quality and the incipience of internationalization was seen. on the other hand, there was but a reduced nucleus of groups who took important steps towards consolidation and there are still few top-quality indexed journals in colombia.
DINáMICA Y TRANSFORMACIONES DE LA INDUSTRIA COLOMBIANA
Malaver Rodríguez,Florentino;
Cuadernos de Economía , 2002,
Abstract: this paper carries out a brief look of the dynamic and transformation of colombian industry during the last decade. for this purpose several things are analyzed: i) i ts behavi or in terms of competitivity; ii) the evolution of its markets; the transformations and productive performance within the sector; iii) the transformations of the industrial structure; iv) the existing relationship between the productive and technological performance of the industry; v) and finally, some conclusions and considerations are proposed.
La investigación en gestión empresarial
Florentino Malaver Rodríguez
Academia : Revista Latinoamericana de Administración , 1999,
Abstract:
El despegue de la investigación colombiana en administración: análisis de sus avances en el período 2000-2006 Colombian research in administration takes off: an analysis of the progress made from 2000 to 2006
Florentino Malaver Rodríguez
Cuadernos de Administración , 2006,
Abstract: El texto indaga por el grado de avance registrado en la investigación en el área de administración en Colombia durante la última década, en particular en el período 20002006. Esos avances se evalúan mediante nociones que provienen de las perspectivas institucional y de los recursos y las capacidades aplicadas al análisis de los grupos de investigación y las revistas indexadas del área. Para establecer el desarrollo de los grupos se utilizan indicadores sobre su trayectoria, la cantidad y calidad de su producción; para las revistas, su nivel y ámbito de indexación. La información proviene de cuatro bases de datos: la de grupos de investigación, GrupLAC; las de revistas nacionales indexadas y de revistas internacionales homologadas en el Publindex colombiano, y el Journal Citation Index. El estudio muestra que en el período crecieron la investigación, así como la cantidad y calidad de los productos de los grupos; que hubo una incipiente internacionalización, y que, además, sólo un núcleo reducido de grupos presenta avances importantes para su consolidación, y son insuficientes las revistas indexadas de alta calidad en Colombia. This paper looks into the degree of progress made in administration research in Colombia in the past ten years, and more specifically from 2000 to 2006. The progress is evaluated using notions from both institutional and resource perspectives, the research groups’ analytical capabilities, and indexed administration journals. To establish the development of the research groups, the indicators used were track record and production quantity and quality. For the journals, the indicators were indexing level and ambit. Information was gathered from four databases: the research group database GrupLAC, the national indexed journal database and the database of international journals homologated in the Colombian Publindex, and the Journal Citation Index. Study results for the period under study show that, on one hand, research increased as did the research groups’ products in both quantity and quality and the incipience of internationalization was seen. On the other hand, there was but a reduced nucleus of groups who took important steps towards consolidation and there are still few top-quality indexed journals in Colombia.
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