Repositorio Académico de la Universidad de Chile: Recent submissions
Now showing items 42541-42560 of 98435
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(Blackwell Publishing Ltd, 2002)Ion beam-plasma interactions are the source of wave activity in several space environments. Therefore the study of these waves and their parametric decays are very important in space physics. Thus we study parametric decays ...
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Do psychological distress and somatization contribute to misattribution of asthma? A Chilean study (2007)Objective: The aim of this study was to assess the association between asthma and distress by whether symptoms of asthma present alone or are accompanied by atopy or bronchial reactivity to methacholine [bronchial ...
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(Blackwell Publishing Ltd, 2004)We study the effect of a large-amplitude left-hand polarized wave on ion acoustic instabilities. We show that the presence of a finite amplitude left-hand polarized wave produces electrostatic instabilities above a threshold ...
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(2008)It has been shown that a large amplitude Alfv́n wave can stabilize linear magnetosonic instabilities triggered by an ion beam. This phenomenon occurs for large amplitude waves above a threshold value. Here the effect of a ...
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(Blackwell Publishing Ltd, 2000)It is well known that in plasmas with β = (νs/νA)2 < 1 (νs is the ion acoustic velocity and νA is the Alfvén velocity), Alfvén waves propagating along an external magnetic field can have three kinds of parametric ...
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(1979)The transfer free energies of a series of substituted phenols and phenoxide ions from water to micelles of cetyltrimethylammonium bromide (CTABr) have been measured at high and low pH. The contribution of each methylene ...
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(Blackwell Publishing Ltd, 2001)We study ion acoustic damping effects on parametric decays of right-hand-polarized electromagnetic waves. We do this because ion beams have been observed in a variety of space environments, and consequently, these waves ...
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(2007)Introduction: Cisternal and ventricular blood predisposes to hydrocephalus and cerebral ischemia after high-grade aneurysmal subarachnoid hemorrhage (HGSAH). We studied the role of lamina terminalis fenestration combined ...
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(2008)Aim: Our objective was to investigate in cardiac muscle the contribution of NADPH oxidase to (a) ryanodine receptor-2 (RyR2) S-glutathionylation and (b) the preconditioning effects of exercise and tachycardia on infarct ...
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(2008)The unfolded protein response (UPR) is a conserved adaptive reaction that increases cell survival under endoplasmic reticulum (ER) stress conditions. X-box-binding protein-1 (XBP-1) is a key transcriptional regulator of ...
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(Blackwell Publishing Ltd, 2007)The effects of a finite-amplitude Alfvén wave in a plasma system with a proton and an alpha-particle beam, are studied. The system is described by a fourteenth-order polynomial providing, thereby, many decay channels for ...
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(1985)Ionization degrees (α) of micelles of hexadecyltrimethylammonium (CTAX) and tetradecyltrimethylammonium (TTAX) (X = OH-, Br-, Cl-, NO3 -, SO4 2-, and CO3 2-) were measured by a modified free electrophoresis method and by ...
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(1975)A higher yield of Coxsackie B1 virus was obtained when HeLa cells were infected late during S phase as compared to the amount produced by random cultures.
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(1974)The case of a 57 yr old woman is presented who had a pulsatile mass in the area of the right kidney which was found during a physical examination. Pyelographic study and arteriography showed a large arteriovenous fistula ...
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(1989)In a previous paper [J. Plasma Phys. 34, 299 (1985)] it was shown that resistivity and thermal conductivity lead to large scale stationary convection in a current-carrying cylindrical plasma under the action of a shearless ...
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(2008)Background: Some gene polymorphisms strongly protect against the development of alcoholism. A large proportion of East Asians carry a protective inactivating mutation in aldehyde dehydrogenase (ALDH2*2). These subjects ...
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(1988)Although the role played by cold ions on the electromagnetic proton-cyclotron instability has been thoroughly investigated, there are some aspects which deserve further attention. Moreover, since the presence of ion cyclotron ...
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(1994)In this work we study the Heisenberg XXZ antiferromagnetic model for spin S and dimension d in the presence of an external longitudinal magnetic field. First, we essay a variational approach which uses as trial function a ...
