This paper presents results from a study to develop cryopreservation procedures for apices of several strawberry genotypes. Five Fragaria x ananassa Duch. cultivars and two wild species (F. ...chiloensis and F. virginiana) have been screened using the encapsulation-dehydration
method and/or a protocol which compromises vitrification and encapsulation-dehydration. Apices were encapsulated in an alginate gel, precultured on media containing high levels of sucrose (0.8 M, conventional protocol), or a combination of 0.4 M sucrose and 2 M glycerol. Recovery rates varied
among genotypes (23-63%). The latter method reduced considerably the time needed for the cryogenic procedure by eliminating the pre-treatment with 0.8 M sucrose for 19 h prior to dehydration, as required by the conventional procedure.
This study compares agronomic traits of three cultivars of strawberry in plants derived from conventional propagation, micropropagated and cryopreserved apices. The apices were stored in liquid ...nitrogen for one year. The agronomic traits evaluated were fruit production and fruit quality: no major changes were found in plants derived from cryopreserved apices, as compared with those from in vitro micropropagated and conventionally propagated plants. Differences were, however, found in some of the fruit production traits studied in the in vitro micropropagated plants of the cultivar Camarosa.
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5.
Strawberry varieties: registration of commercial varieties Chomé Fuster, P.(ed.); Martínez-Treceño Ayuso, A. (Ministerio de Agricultura, Pesca y Alimentación, Madrid (España). Oficina Española de Variedades Vegetales); Bartual Pastor, R ...
2006
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La evaluación de las condiciones ambientales, tanto en sala como en vitrinas, realizada en el Museo Naval de Madrid a partir de un protocolo de seguimiento de la acidez ambiental que utiliza sensores ...ópticos basados en la tecnología sol-gel, sirvió para constatar que las condiciones de conservación eran adecuadas en la mayoría de los espacios expositivos. Sin embargo, en algunas vitrinas en las que se habían observado problemas de conservación de objetos metálicos procedentes de pecios, los valores de pH ambiental detectados fueron ácidos (valores promedio inferiores a pH = 6,5). Esta contribución presenta los resultados de la investigación llevada a cabo para determinar las causas de los problemas de conservación observados en una vitrina que expone balas de plomo, con el propósito de establecer pautas de conservación preventiva. Las balas de plomo desarrollaban una capa blanquecina poco consistente tras su limpieza y posterior protección contra la corrosión con una resina acrílica comercial. Se realizaron diferentes ensayos en el laboratorio con los objetos tratados y sin tratar dentro de recipientes cerrados, y con los soportes y contenedores de polimetilmetacrilato del interior de las vitrinas, utilizando en ambos casos los sensores ópticos mencionados. Los resultados indicaron que en los objetos de plomo se formaba una capa de formiato de plomo producida por la presencia de especies ácidas cuyo origen se debe, muy probablemente, al efecto combinado del empleo de la resina acrílica y la presencia de materiales de polimetilmetacrilato en un ambiente cerrado. La determinación del pH en el ambiente de dicha vitrina y su seguimento en los ensayos de laboratorio ha permitido alertar sobre el medio ácido generado, lo cual ha servido para establecer acciones correctoras de conservación preventiva en el museo.
We used direct arrivals of P and S waves recorded by the seismic network of northern Baja California (RESNOM) to estimate the quality factor
Q in the Peninsular Ranges of Baja California, Mexico. ...Spectral amplitudes from 34 earthquakes with magnitudes between 2.2 and 4.0 were analyzed to determine attenuation functions at 17 frequencies (0.3 <
f < 12.6 Hz). The estimates of
Q were retrieved from the attenuation functions obtained assuming a geometrical spreading function of
1
r
(
r being the hypocentral distance) for
r < 80 km and
(80r)
−1
2
for
r > 80 km.
Q for both P and S increases with frequency taking the form
Q
P = 14.4
f
0.9 for P waves and
Q
S = 28.3
f
1.0 for S waves. The ratio of
Q
P
Q
S
≈ 0.5
obtained in northern Baja California is similar to that obtained by Hough et al. (1988) Attenuation near Anza, California. Bull. Seism. Soc. Am. 78, 672–691 (
Q
P
Q
S
≈ 0.54
) for the Southern California Batholith near Anza, and the ratio reported by Taylor et al. (1986) Attenuation and scattering of broadband P and S waves across Noth America. J. Geophys. Res. 91, 7309–7325 for the crust and upper mantle in the Basin and Range region for high frequencies (
f > 2 Hz). This result suggests that scattering effects are an important factor affecting the decay of the attenuation functions in the Peninsular ranges of Baja California.
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Breast cancer is the second most common cancer in Peruvian women. Due to limitations in national breast cancer screening programs, especially in rural areas, more than 50% of cases of breast cancer ...in Peru are diagnosed in advanced stages. In collaboration with a local clinic registered as a nongovernmental organization (CerviCusco), RAD-AID International aims to create a sustainable diagnostic structure to improve breast cancer screening in Cuzco. With the support of local, national, and international partners that have collaborated in analyzing radiological resources, raising awareness in the population, acquiring equipment, training clinical staff, and building referral networks, our teams of radiologists, included in the RAD-AID team, have participated in training CerviCusco staff in breast ultrasound, thus enabling additional training for radiology residents through a regulated international collaboration.
El cáncer de mama es el segundo cáncer más frecuente en las mujeres peruanas. Las limitaciones de los programas nacionales de detección precoz, sobre todo en las regiones rurales, propician que más del 50% de los nuevos casos de cáncer de mama en Perú se diagnostiquen en estadios avanzados. RAD-AID Internacional, en colaboración con una clínica local registrada como organización no gubernamental (CerviCusco), pretende crear una estructura diagnóstica sostenible que mejore el cribado del cáncer de mama en Cuzco. Para ello se ha contado con socios locales, nacionales e internacionales que han colaborado en el análisis de recursos radiológicos, la concienciación de la población, la adquisición de equipamiento, el entrenamiento clínico y las redes de referencia. Nuestros equipos de radiólogos, incluidos en el equipo RAD-AID, han participado en la capacitación ecográfica del personal de CerviCusco, permitiendo una formación adicional a los residentes de radiología gracias a una colaboración internacional reglada.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
Breast cancer is the second most common cancer in Peruvian women. Due to limitations in national breast cancer screening programs, especially in rural areas, more than 50% of cases of breast cancer ...in Peru are diagnosed in advanced stages. In collaboration with a local clinic registered as a nongovernmental organization (CerviCusco), RAD-AID International aims to create a sustainable diagnostic structure to improve breast cancer screening in Cuzco. With the support of local, national, and international partners that have collaborated in analyzing radiological resources, raising awareness in the population, acquiring equipment, training clinical staff, and building referral networks, our teams of radiologists, included in the RAD-AID team, have participated in training CerviCusco staff in breast ultrasound, thus enabling additional training for radiology residents through a regulated international collaboration.
Full text
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
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