Katia L Sáez

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The anatomic and functional leaf characteristics related to photosynthetic performance of Castanea sativa growing in vitro and in nursery were compared. The irradiance saturated photosynthesis in in vitro grown plantlets was significantly lower compared to nursery plants (65 vs. 722 μmol m−2 s−1). The maximum photosynthetic rate (PNmax) was 4.0 and 10.0(More)
The effects of increased photon flux (100 μmol m−2 s−1), ventilation, and standard in vitro culture (40 μmol m−2 s−1) with no ventilation were investigated on the physiological and histological characteristics of microshoots of Gevuina avellana. The increase in photon flux (light treatment) produced significant improvement in the fluorescence parameters of(More)
Genome-wide linkage studies have defined a broad susceptibility region for late-onset Alzheimer's disease on chromosome 12, which contains the Low-Density Lipoprotein Receptor-Related Protein 6 (LRP6) gene, a coreceptor for Wnt signaling. Here, we report the association between common LRP6 variants and late-onset Alzheimer's disease in a multicenter(More)
Childhood and adolescent obesity is highly prevalent and a relevant public health problem in Chile. Metabolic syndrome (MS), which is predictive of future cardiovascular disease and type 2 diabetes, has been associated with childhood obesity and insulin resistance. The aim of this study was to determine the prevalence of MS in a non-consultant obese(More)
This work aimed to study biochemical biomarkers and population responses in the polychaete Perinereis gualpensis (Nereididae) from two Chilean estuaries, Lenga (36°45'S; 73°10'W) and Tubul-Raqui (37°14'S,73°26'W). Lenga estuary is characterized by high mercury and PAH levels as consequence of several historic incidental spills while Tubul is mainly impacted(More)
This study was undertaken to measure certain carbon (C) fluxes in a Pinus ponderosa-based silvopastoral systems (SPS) in Patagonia, Chile. Results are compared to those from adjacent 18-year-old managed pine plantations (PPP) and natural prairie (PST). Litter decomposition was determined using the litterbag method. Leached soil solution was collected with(More)
BACKGROUND bacterial diversity of the stomach includes various species. Among them, Helicobacter pylori, a microorganism which has been associated to gastric diseases, is frequently isolated in this habitat. In addition, Lactobacillus spp., a genus including probiotic strains, has also been documented in this habitat. The co-existence of these two species(More)
BACKGROUND The frequency of obesity is increasing steadily in Chile. AIM To assess the prevalence of obesity and overweight in children and teenagers living in three southern Chilean cities. MATERIAL AND METHODS The database of an evaluation performed in 2006 in schools, was used to obtain weight and height of 32514 subjects aged 12 ± 4 years (48%(More)
This study is part of a screening program aimed at searching for bioactive metabolites from Chilean basidiomycetes. Submerged cultivation of fungal mycelia in liquid media was evaluated for antimicrobial activity. A total of 148 strains were obtained in vitro. The extracts produced from submerged cultures were evaluated against bacteria and fungi. In the(More)
PURPOSE This paper analyses the presence of polychlorinated biphenyls (PCBs) in escaped: farmed and wild salmons in southern Chile, analysing their concentrations and congener profiles in two species (Oncorhynchus kisutch and Oncorhynchus mykiss). METHODS Muscle samples from both farmed and escaped fish of two species, O. mykiss (rainbow trout) and O.(More)