Listar Ciencias agroalimentarias por autor "7f3a8efc-589d-4913-8fe4-d090996f5b4e"
Mostrando ítems 1-19 de 19
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Caracterización anatómica ultraestructural de las variantes “Atlántica”, “Sur” y “Cebolla” del bambú, Guadua angustifolia (Poaceae: Bambusoideae), en Costa Rica
Montiel Longhi, Mayra; Jiménez García, Víctor; Guevara Berger, Eric (2006-08-20)We present an ultrastructural characterization of three variants or “forms” of Guadua angustifolia and of the closely related Guadua sp., from Costa Rican populations. Their ultrastructure is similar. Differences are: ... -
Challenges for Food and Nutrition Security in the Americas: Costa Rica and its commitment to sustainability
Jiménez García, Víctor; Acuña Gutiérrez, Catalina; Agüero Vargas, Marilín; Alvarado Hernández, Alfredo; Ávila Agüero, María L.; Blanco Vega, Marialis; Dumani Echandi, Marcela; Esquivel Rodríguez, Patricia; Gatica Arias, Andrés Mauricio; Guevara Berger, Eric; Hernández Pridybailo, Andrés; Hernández Cordero, Raquel; Holst Sanjuán, Andrea; Madriz Morales, Karol; Mata Segreda, Julio Francisco; Quirós Madrigal, Olman José; Radulovich Ramírez, Ricardo; Salas Chaves, Álvaro; Solórzano Cascante, Paúl (2017-11)As a small nation with high biodiversity and an extensive system of protected areas, Costa Rica will face particular challenges regarding food security over the next few years. Thus, whatever development model the country ... -
Changes in hormone concentrations during dormancy release of oil palm (Elaeis guineensis) seeds
Jiménez García, Víctor; Guevara Berger, Eric; Herrera Quirós, Jorge; Alizaga López, Ramiro; Bangerth, Fritz K. (2008-10)Oil palm (Elaeis guineensis) seeds are highly dormant immediately after harvest. In practical horticulture this dormancy has been traditionally overcome by a dry-heat treatment and, more recently, through the application ... -
Coffee (Coffea arabica L.) by-Products as a Source of Carotenoids and Phenolic Compounds—Evaluation of Varieties With Different Peel Color
Esquivel Rodríguez, Patricia; Viñas Meneses, María; Steingass, Christof Björn; Gruschwitz, Maike; Guevara Berger, Eric; Carle, Reinhold; Schweiggert, Ralf M.; Jiménez García, Víctor (2020)Analysis of pulp and peels of Arabica coffee varieties with different external fruit color allowed the identification of 16 phenolic compounds using high-performance liquid chromatography with diode array detection and ... -
Effect of hydrogen cyanamide on the endogenous hormonal content of pea seedlings (Pisum sativum L.)
Guevara Berger, Eric; Jiménez García, Víctor; Herrera Quirós, Jorge; Bangerth, Fritz K. (2008)Hydrogen cyanamide (HC) has been used to break bud and seed dormancy and to improve rooting in several species, responses usually associated with the action of plant hormones. However, very few studies have measured ... -
Effect of macronutrients and sucrose concentration on in vitro growth of Drosera capensis L. (Droseraceae) plants, and evaluation of six substrates for acclimatization
Jiménez García, Víctor; Guevara Berger, Eric; Masís, Silvia (2011-01)The effect of two concentrations of the Murashige and Skoog macronutrients (full and half strength), in combination with three concentrations of sucrose (1.5, 3.0 and 4.5% w/v), was evaluated on the in vitro growth of ... -
Endogenous hormone levels in habituated nucellar Citrus callus during the initial stages of regeneration
Jiménez García, Víctor; Guevara Berger, Eric; Herrera Quirós, Jorge; Bangerth, Fritz K. (2001-01)Embryogenic nucellar callus cultures of different Citrus species and cultivars growing in hormone-free medium were transferred to medium containing either sucrose or glycerol as the only carbohydrate source. Glycerol has ... -
Evolution of endogenous hormone concentration in embryogenic cultures of carrot during early expression of somatic embryogenesis
Jiménez García, Víctor; Guevara Berger, Eric; Herrera Quirós, Jorge; Bangerth, Fritz K. (2004-09)Embryogenic callus and suspension cultures of carrot (Daucus carota L., cv. Nantaise), growing on/in medium including 1 mg/l 2,4-dichlorophenoxy acetic acid (2,4-D), were transferred to medium with or without this plant ... -
Identification of Phenolic and Carotenoid Compounds in Coffee (Coffea Arabica) Pulp, Peels and Mucilage by HPLC Electrospray Ionization Mass Spectrometry
Viñas Meneses, María; Gruschwitz, Maike; Schweiggert, Ralf M.; Guevara Berger, Eric; Carle, Reinhold; Esquivel Rodríguez, Patricia; Jiménez García, Víctor (2013)Coffee pulp, peels, and mucilage are by-products accruing from wet coffee processing. Like coffee seeds, the se fruit tissues contain substantial amounts of polyphenols and other bioactives. In the present study, polyphenols ... -
In vitro propagation of the neotropical giant bamboo, Guadua angustifolia Kunth, through axillary shoot proliferation
Jiménez García, Víctor; Magsig Castillo, Jhamna; Tavares, Elena; Guevara Berger, Eric; Montiel Longhi, Mayra (2006)Guadua angustifolia Kunth was successfully propagated in vitro from axillary buds. Culture initiation, bud sprouting, shoot and plant multiplication, rooting and acclimatization, were evaluated. Best results were obtained ... -
Micropropagación de Guadua angustifolia Kunth a partir de explantes nodales
Jiménez García, Víctor; Magsig Castillo, Jhamna; Tavares, Elena; Guevara Berger, Eric; Montiel Longhi, Mayra (2004)Se evaluó el efecto de diferentes estrategias de desinfección, así como de varias concentraciones de la citoquinina 6-bencilamino purina (BAP) en el medio de cultivo, sobre el establecimiento y desarrollo in vitro de ... -
Morfogénesis in vitro de Anthurium cubense (Araceae)
Warner Pineda, Jorge; Herrera Quirós, Jorge; Guevara Berger, Eric (1993-12-01)A study of the in vitro morphogenesis of Anthurium cubense was done to develop a suitable micropropagation method. Some factors which affect callus formation from leaf segments are: leaf expansion percentage of the explant ... -
Propagación in vitro de Phalaenopsis (Orchidaceae) mediante el cultivo de secciones de ejes florales después de la senescencia de las flores
Jiménez García, Víctor; Guevara Berger, Eric (1996-01-01)Segmentos nodales provenientes de inflorescencias senescentes de híbridos de Phalaenopsis fueron desinfectados dos veces y colocados en un medio sólido MS modificado bajo en calcio y con varios aditivos orgánicos (vitaminas, ... -
Regeneración in vitro mediante embriogénesis somática de variedades de cítricos. I. Obtención de callo friable y suspensiones celulares de naranja dulce (Citrus sinensis) y naranja agria (Citrus aurantium) cultivadas en Costa Rica
Jiménez García, Víctor; Guevara Berger, Eric (1995-03-31)In vitro plant regeneration of citrus through somatic embryogenesis. I. Establishment of friable calli and suspension cultures of local cultivars of sweet orange (Citrus sinensis) and sour orange (Citrus aurantium). Friable ... -
Response of Endogenous Hormone Concentrations to Two Floral Inductive Treatments, viz. KNO3 and PBZ, in Mango cv. ‘Tommy Atkins’ Growing Under Tropical Conditions
Guevara Berger, Eric; Jiménez García, Víctor; Bangerth, Fritz K. (2012-07-20)Floral induction (FI) has been intensively studied in mango, more under sub-tropical than under tropical environments. Decreases in temperature below 20 °C, which is common in sub-tropical regions but seldom occurs in many ... -
Ultraestructura del bambú Guadua amplexifolia (Poaceaea: Bambusoideae) presente en Costa Rica
Jiménez García, Víctor; Montiel Longhi, Mayra; Guevara Berger, Eric (2006-12)Se estudió la ultraestructura anatómica de la lámina y la vaina de la hoja, así como de la bráctea del culmo, de Guadua angustifolia var. Bicolor, por medio de los micros-copio electrónico de barrido. Se encontraron ... -
Ultraestructura del bambú Guadua angustifolia var. bicolor (Poaceae: Bambusoideae), presente en Costa Rica
Montiel Longhi, Mayra; Jiménez García, Víctor; Guevara Berger, Eric (2006-08-20)Sections of leaf lamina, leaf sheath and branches of adult Guadua paniculata collected in Costa Rica, were studied ultrastructurally. Diagnostic ultrastructural characteristics include the cellular pattern of the adaxial ... -
Ultraestructura del bambú Guadua macclurei (Poaceae: Bambusoideae) de Costa Rica
Montiel Longhi, Mayra; Guevara Berger, Eric; Jiménez García, Víctor (2006-08-20)Se evaluaron ultraestructuralmente secciones de la lámina de la hoja, vaina de la hoja y rama, de una planta adulta de Guadua macclurei. Las brácteas del culmo carecen de setas orales. En la superficie adaxial de la lámina ... -
Ultraestructura del bambú Guadua paniculata (Poaceae: Bambusoideae) de Costa Rica
Montiel Longhi, Mayra; Guevara Berger, Eric; Jiménez García, Víctor (2006-12)Sections of leaf lamina, leaf sheath and branches of adult Guadua paniculata collected in Costa Rica, were studied ultrastructurally. Diagnostic ultrastructural characteristics include the cellular pattern of the adaxial ...