Browsing by Title Artículos de revistas
Now showing items 1165-1184 of 4966
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(Elsevier, 2020)Forestry plantations of Pinus radiata, managed through clearcutting method, would offer resistance to the movement of native fauna among remnants of native forest. In this study, we evaluate the possibilities of establishing ...
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(AMER CHEMICAL SOC, 2006-07-06)This work deals with exploring some empirical scales of nucleophilicity. We have started evaluating the experimental indices of nucleophilicity proposed by Legon and Millen on the basis of the measure of the force constants ...
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(Kluwer Academic/Plenum Publishers, 1999)The effect of defoliation and consecutive defoliation (condefoliation) of rye seedlings on the allocation patterns of biomass and hydroxamic acids (Hx) was evaluated five days after treatment. Growth of condefoliated ...
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(2006)Intentional cranial deformation is a long lasting and worldwide form of permanent modification of the main human head distinctive anatomical attributes. In northern Chile it was extensively done during five thousand years ...
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(2004)Palynologic and stratigraphic data from Laguna Tahui (42°50′S, 73°30′W) indicate cool-temperate and humid conditions there between 14,000 and 10,000 14C yr B.P., followed by warmer and drier-than-present conditions between ...
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(2012)We report pollen, spore, and charcoal records from Lago Augusta (47°05'S, 72°23'W, 440m a.s.l.), a small closed-basin lake located near the modern forest-steppe ecotone east of the Andes in Central Patagonia, Chile. The ...
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(ROCKEFELLER UNIV PRESS, 2000-02)When attached outside the voltage-sensing S4 segment of the Shaker potassium channel, the fluorescent probe tetramethylrhodamine (TMRM) undergoes voltage-dependent fluorescence changes (Delta F) due to differential interaction ...
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(2011)Background: Dendritic cells (DCs) are professional antigen-presenting cells able to induce immunity or tolerance. The interactions of immature DCs with naive T lymphocytes induce peripheral tolerance through mechanisms ...
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(Facultad de Filosofia, UNED, 2017)
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(Elsevier, 2020)The mechanisms which promote divergence in populations of phytophagous insects using alternative hosts depend on the characterization of hosts as different selective scenarios and the modeling of the demographic dynamics ...
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(Springer, 2018)Climatic and oceanographic events occurring during the last glacial cycle in the Humboldt Current System (HCS) have left genetic footprints in marine invertebrate populations. The objective of this study was to evaluate ...
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(SPRINGER, 2007-09-09)Demographic responses of a commensal annelid of freshwater crayfish, Stratiodrilus aeglaphilus, to a sublethal organic enrichment were tested. Censuses of the S. aeglaphilus population were performed every 3 days during ...
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(1970)WE wish to report a new method with which we have been able to measure the sodium and potassium conductance changes postulated by Hodgkin and Huxley1 in the course of a single action potential. To measure the membrane ...
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(2013)Systemic lupus erythematosus (SLE) is an autoimmune disease characterized by the increase in the percentage of autoreactive B and T lymphocytes. Since dendritic cells (DCs) are essential for B cell and T cell function, ...
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(ELSEVIER, 2010)Background. CD4 CD25 Foxp3 regulatory T cells (Treg) play an essential role in immune tolerance, suppressing responses against self-antigens. Additionally, Treg play an important role in maintaining immunosuppression ...
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(1998)Lumbering of Fitzroya cupressoides in Chile began in 1599 and continued until 1976, when the species was declared a national monument and cutting of live trees was prohibited. Today, F. cupressoides is threatened; many of ...
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(2011)Negative density-dependent relationships in plant communities are currently claimed as an important mechanism for the maintenance of plant diversity. However, anthropogenic perturbations such as forest fragmentation might ...
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(2010)The Density Functional Theory of chemical reactivity has provided and effective way to develop a mathematical framework for many empirical chemical concepts. In this work, the relation of some of the proposed indexes ...