Browsing by Author "Gonzalez, J"

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    Differences in the early stages of development of gametophytes and tetrasporophytes of Chondracanthus chamissoi (CAg) Kutzing from Puerto Aldea, northern Chile
    (1996) Gonzalez, J; Meneses, I
    Gametophytes of Chondracanthus chamissoi are more abundant in the field than tetrasporophytes. This differential phase ratio is well known in the literature for other members of the Gigartinaceae and has been explained as the result of either stochastic events or differential reproductive or physiological capacities between the phases. The comparison of both phases of Chondracanthus chamissoi in their early stages of development under laboratory conditions were summarised. Despite the higher biomass of reproductive tetrasporophytes recorded in summer (the seasonal maxima), significantly more carpospores are released per gram than tetraspores. During the following processes of settlement and germination, tetraspores show higher average values mainly due to their persistence in time. These differences tend to disappear in winter when the capacity of spores to develop normally appears to be lower. On the other hand, sporophytic growth rates are higher than gametophytic growth rates for most conditions of day length, light intensity and temperature. With no other external factors considered, the higher abundance of gametophytes in the field appears to be a result of the higher capacities of tetraspores to settle and germinate after an extended period of time suspended in the water column.
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    Epidural anaesthesia for ureteral reimplantation in an infant with congenital tracheal stenosis
    (1997) Concha, M; Gonzalez, J; Gonzalez, A; Dagnino, J; Molina, R
    Purpose: We report a case of an infant with severe congenital tracheal stenosis who underwent ureteral reimplantation using lumbar epidural anaesthesia combined with light general anaesthesia,
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    In vitro regeneration of Gomortega keule (Gomortegaceae), a Chilean endemic tree in danger of extinction
    (2005) Jordan, M; Gonzalez, J; Roveraro, C
    Axillary buds of nodal sections from 2-year old trees of Gomortega keule (Mol.) Baillon, 'Queule', 'Keule', (Family: Gomorte gaceae) were induced to sprout and developed many shoots in presence of 0.54 mu M naphthaleneacetic acid (NAA) and 4.44 mu M benzylaminopurine (BA) in a liquid WP-medium (LLOYD and McCowN 1980) within a period of 2-3 weeks. After transfer to a medium containing 22.2 mu M BA, each new single node section of about 0.5 cm initiated numerous adventitious shoots; alternatively, roots were formed when these explants were transferred to a medium containing 2.95, 12.3 or 24.6 mu M indolebutyric acid (IBA). Root formation took place in presence of 24.6 mu M IBA in approx. 46 % of the sub-cultured nodal segments after a period of 3 months, leading to plandets. Regeneration response was restricted to the sprouts of axillary buds; other explant-types tested, i.e. petioles, leaf, and internodal sections showed callus formation only and no other responses.
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    Rho-kinase pathway activation and apoptosis in circulating leucocytes in patients with heart failure with reduced ejection fraction
    (2020) Ocaranza, María Paz; Moya, J; Jalil Milad, Jorge; Lavandero, S; Kalergis Parra, Alexis Mikes; Molina, C; Gabrielli, Luigi; Godoy J., Iván; Cordova, Samuel; Castro Gálvez, Pablo Federico; Mac Nab, P; Rossel, V; Garcia, L; Gonzalez, J; Mancilla, C; Fierro, C; Farias, L