Search results for "fern"
showing 10 items of 163 documents
Satisfaccion a la nota sobre la cita del Tomo Sexto, Discurso 1. numero 49. contenida en el Memorial, que presentò al Rey N. S. el Chronista General …
Sense port. ni colofó. Com a tít. el començament del text Signat al final: "Fr. Francisco de Soto y Marne." Inclou, v. del f. 9: "Satisfaccion a la nota sobre la cita del Tomo Sexto, Discurso 1. numero 49. contenida en el Memorial, que presentò al Rey N. S. el Chronista General de la Religion de San Francisco" Caplletra ornada Reclams
Effects of temperature and desiccation on ex situ conservation of nongreen fern spores
2012
Premise of the study Fern spores are unicellular and haploid, making them a potential model system to study factors that regulate lifespan and mechanisms of aging. Aging rates of nongreen spores were measured to compare longevity characteristics among diverse fern species and test for orthodox response to storage temperature and moisture. Methods Aging of spores from 10 fern species was quantified by changes in germination and growth parameters. Storage temperature ranged from ambient room to -196°C (liquid nitrogen); spores were dried to ambient relative humidity (RH) or using silica gel. Key results Survival of spores varied under ambient storage conditions, with one species dying within …
Water properties in fern spores: sorption characteristics relating to water affinity, glassy states, and storage stability.
2007
Ex situ conservation of ferns may be accomplished by maintaining the viability of stored spores for many years. Storage conditions that maximize spore longevity can be inferred from an understanding of the behaviour of water within fern spores. Water sorption properties were measured in spores of five homosporeous species of ferns and compared with properties of pollen, seeds, and fern leaf tissue. Isotherms were constructed at 5, 25, and 45 degrees C and analysed using different physicochemical models in order to quantify chemical affinity and heat (enthalpy) of sorption of water in fern spores. Fern spores hydrate slowly but dry rapidly at ambient relative humidity. Low Brunauer-Emmet-Tel…
Calorimetric properties of water and triacylglycerols in fern spores relating to storage at cryogenic temperatures.
2007
Abstract Storing spores is a promising method to conserve genetic diversity of ferns ex situ . Inappropriate water contents or damaging effects of triacylglycerol (TAG) crystallization may cause initial damage and deterioration with time in spores placed at −15 °C or liquid nitrogen temperatures. We used differential scanning calorimetry (DSC) to monitor enthalpy and temperature of water and TAG phase transitions within spores of five fern species: Pteris vittata , Thelypteris palustris , Dryopteris filix-mas , Polystichum aculeatum , Polystichum setiferum . The analyses suggested that these fern spores contained between 26% and 39% TAG, and were comprised of mostly oleic ( P. vittata ) or …
Una escritura comprometida con su tiempo. El teatro de José Ramón Fernández (1992-2012)
2015
José Ramón Fernández es uno de los dramaturgos españoles con más pro- yección en los últimos años. Tanto es así que en 2011 recibió el Premio Nacional de Literatura Dramática por La colmena científica o El café de Negrín. Su adscripción hasta hace unos años al colectivo Teatro del Astillero, las ca- racterísticas que dicha adscripción supusieron en su dramaturgia, así como su com- promiso con el tiempo en el que vive, son elementos que invitan a estudiar su obra de forma profunda en este trabajo de tesis. De la escritura de José Ramón Fernández se desprende un fuerte compromi- so con la problemática social del mundo contemporáneo, como es la marginalidad, soledad, inmigración, la importanci…
Una tabla inédita de Fernando Yáñez y nueva luz sobre su estancia en Almedina (1518-1525)
2020
The contribution presents a new acquisition for the catalog of Fernando Yáñez, a Holy Family dating back to 1523, shedding new light on the artist?s production in the third decade of the sixteenth century during his return to Almedina, his birthplace, in a time frame that divides the works for Valencia, like the retablo mayor for the city?s cathedral, from his altarpieces for Cuenca.