Gravitación.

Se consideran las leyes que rigen el movimiento de un cuerpo sometido a fuerzas centrales. Después, siguiendo las leyes de Kepler, se observa que el movimiento de los planetas es de este tipo. Y, por último, se llega a la deducción de la ley de Newton.

El Credo del pueblo de Dios : fue formulado por S. S. Pablo VI en la clausura del 'Año de la Fe'.

Se presenta y analiza la nueva formulación del Credo católico por Su Santidad Pablo VI, en la homilía de la Misa celebrada en la Basílica Vaticana el 29 de junio de 1968, en un intento de adaptar su lenguaje al mundo del momento.

Salinas de la Región de Murcia : un ejemplo de desarrollo sostenible

Convocatoria de premios a la elaboración de materiales curriculares sobre la identidad de la Región de Murcia 2010, primer premio

El Valle de Ricote.

Convocatoria de premios a la elaboración de materiales curriculares sobre la identidad de la Región de Murcia 2010, accésit

Los deportes autóctonos en la Región de Murcia : los bolos huertanos y bolos cartageneros.

Convocatoria de premios a la elaboración de materiales curriculares sobre la identidad de la Región de Murcia 2010, accésit

Hacia una región sostenible : Región de Murcia.

Convocatoria de premios a la elaboración de materiales curriculares sobre la identidad de la Región de Murcia 2010, segundo premio

Centre de Seguretat de la Informació de Catalunya

Josué Sallent, Director del Centre de Seguretat de la Informació de Catalunya, CESICAT, parla de la seguretat des del punt de vista de l'administració autonòmica

A influência das atitudes e da ansiedade face à morte na imortalidade simbólica em estudantes

O presente estudo propõe-se verificar a influência das Atitudes e da Ansiedade Face à Morte na Imortalidade Simbólica em estudantes universitários. Procura igualmente perceber quais as relações entre as diferentes variáveis. Com este propósito, foram aplicadas as versões portuguesas do Death Attitude Profile Revised (DAP-R; Wong, Reker, & Gesser, 1994), da Death Anxiety Scale (DAS; Templer, 1970) e da The Sense of Symbolic Immortality Scale (SSIS; Drolet, 1990), juntamente com um Questionário de dados sociodemográficos. Participaram no estudo 310 estudantes universitários de 1º e 2º ciclo, com idades compreendidas entre os 18 e os 56 anos. Os resultados mostram que os estudantes obtêm valores superiores de aceitação neutra e inferiores de aceitação de escape. Relativamente à idade os indivíduos mais velhos apresentam valores superiores de medo e de evitamento da morte, assim como valores inferiores de desejo de imortalidade simbólica. Os homens apresentam resultados mais elevados de aceitação neutra, de escape, de ansiedade face à morte e de desejo de imortalidade simbólica. Constata-se que as atitudes negativas perante a morte e a imortalidade simbólica se correlacionam negativamente com a ansiedade. Os resultados encontrados corroboram a tese de que existe influência das atitudes e da ansiedade no desejo de imortalidade simbólica.

An evaluation of private speech

This literature review examines the use of private speech among typically developing and hearing impaired children. This paper supports the view that private speech provides a self-regulatory function and guides behavior and problem-solving.

Procesos: revista ecuatoriana de historia. 20 (SOLO LIBROS/Reseñas)

PRESENTA LAS RESEÑAS DE LOS SIGUIENTES LIBROS: GERMÁN CARRERA DAMAS, EDIT., HISTORIA DE AMÉRICA ANDINA. CRISIS DEL RÉGIMEN COLONIAL E INDEPENDENCIA, VOL. 4, UNIVERSIDAD ANDINA SIMÓN BOLÍVAR, SEDE ECUADOR/LIBRESA, QUITO, 2003, 434 PP. -- CECILIA PEÑAHERRERA, COMP., CONTANDO HISTORIA: GUALLUPE, OFICINA REGIONAL IBARRA DEL FONDO ECUATORIANO POPULORUM PROGRESSIO, SAN JUAN DE LACHAS, 2001, 158 PP. -- ROCÍO RUEDA NOVOA, ZAMBAJE y AUTONOMÍA. HISTORIA DE LA GENTE NEGRA DE LA PROVINCIA DE ESMERALDAS. SIGLOS XVI-XVIII, COLECCIÓN MAREJADA, No. 1, MUNICIPALIDAD DE ESMERALDAS/TEHIS/ ABYA-YALA, QUITO, 2001, 195 PP.

Notations and conventions in molecular spectroscopy: part 1. General spectroscopic notation

The field of Molecular Spectroscopy was surveyed in order to determine a set of conventions and symbols which are in common use in the spectroscopic literature. This document, which is Part I in a series, establishes the notations and conventions used for general spectroscopic notations and deals with quantum mechanics, quantum numbers (vibrational states, angular momentum and energy levels), spectroscopic transitions, and miscellaneous notations (e.g. spectroscopic terms). Further parts will follow, dealing inter alia with symmetry notation, permutation and permutation-inversion symmetry notation, vibration-rotation spectroscopy and electronic spectroscopy.

The Acute Care Undergraduate TEaching (ACUTE) initiative: consensus development of core competencies in acute care for undergraduates in the United Kingdom

Background: The care of the acutely ill patient in hospital is often sub-optimal. Poor recognition of critical illness combined with a lack of knowledge, failure to appreciate the clinical urgency of a situation, a lack of supervision, failure to seek advice and poor communication have been identified as contributory factors. At present the training of medical students in these important skills is fragmented. The aim of this study was to use consensus techniques to identify the core competencies in the care of acutely ill or arrested adult patients that medical students should possess at the point of graduation. Design: Healthcare professionals were invited to contribute suggestions for competencies to a website as part of a modified Delphi survey. The competency proposals were grouped into themes and rated by a nominal group comprised of physicians, nurses and students from the UK. The nominal group rated the importance of each competency using a 5-point Likert scale. Results: A total of 359 healthcare professionals contributed 2,629 competency suggestions during the Delphi survey. These were reduced to 88 representative themes covering: airway and oxygenation; breathing and ventilation; circulation; confusion and coma; drugs, therapeutics and protocols; clinical examination; monitoring and investigations; team-working, organisation and communication; patient and societal needs; trauma; equipment; pre-hospital care; infection and inflammation. The nominal group identified 71 essential and 16 optional competencies which students should possess at the point of graduation. Conclusions: We propose these competencies form a core set for undergraduate training in resuscitation and acute care.

Triazole induced drought tolerance in horse chestnut (Aesculus hippocastanum)

We determined the influence of the triazole derivatives paclobutrazol, penconazole, epixiconazole, propiconazole and myclobutanil on the drought tolerance and post drought recovery of container-grown horse chestnut (Aesculus hippocastanum L.) saplings. Myclobutanil neither conferred drought resistance, as assessed by its effects on a number of physiological and biochemical parameters, nor affected growth parameters measured after recovery from drought. Chlorophyll fluorescence (F,IF,,), photosynthetic rates, total foliar chlorophyll and carotenoid concentrations, foliar proline concentration and superoxide dismutase and catalase activities were consistently higher and leaf necrosis and cellular electrolyte leakage was lower at the end of a 3-week drought in trees treated with paclobutrazol, penconazole, epixiconazole or propiconazole than in control trees. Twelve weeks after drought treatment, leaf area and shoot, root and total plant dry masses were greater in triazole-treated trees than in control trees with the exception of those treated with myclobutanil. In a separate Study, trees were subjected to a 2-week drought and then sprayed with paclobutrazol, penconazole, epixiconazole, propiconazole or myclobutanil. Chlorophyll fluorescence, photosynthetic rate, foliar chlorophyll concentration and catalase activity over the following 12 weeks were 20 to 50% hi-her in triazole-treated trees than in control trees. At the end of the 12-week recovery period, leaf area and shoot, root and total plant dry masses were higher in triazole-treated trees than in control trees, with the exception of trees treated with myclobutanil. Application of triazole derivatives, with the exception of myclobutanil, enhanced tolerance to prolonged drought and, when applied after a 2-week drought, hastened recovery from drought. The magnitude of treatment effects was in the order epixiconazole approximate to propiconazole > penconazole > paclobutrazol > myclobutanil.

Time course of gag protein assembly in HIV-1-infected cells: a study by immunoelectron microscopy

Recent biochemical studies have identified high molecular complexes of the HIV Gag precursor in the cytosol of infected cells. Using immunoelectron microscopy we studied the time course of the synthesis and assembly of a HIV Gag precursor protein (pr55gag) in Sf9 cells infected with recombinant baculovirus expressing the HIV gag gene. We also immunolabeled for pr55gag human T4 cells acutely or chronically infected with HIV-1. In Sf9 cells, the time course study showed that the first Gag protein appeared in the cytoplasm at 28-30 h p.i. and that budding started 6-8 h later. Colloidal gold particles, used to visualize the Gag protein, were first scattered randomly throughout the cytoplasm, but soon clusters representing 100 to 1000 copies of pr55gag were also observed. By contrast, in cells with budding or released virus-like particles the cytoplasm was virtually free of gold particles while the released virus-like particles were heavily labeled. Statistical analysis showed that between 80 and 90% of the gold particles in the cytoplasm were seen as singles, as doublets, or in small groups of up to five particles probably representing small oligomers. Clusters of gold particles were also observed in acutely infected lymphocytes as well as in multinuclear cells of chronically infected cultures of T4 cells. In a few cases small aggregates of gold particles were found in the nuclei of T4 lymphocytes. These observations suggest that the Gag polyprotein forms small oligomers in the cytoplasm of expressing cells but that assembly into multimeric complexes takes place predominantly at the plasma membrane. Large accumulations of Gag protein in the cytoplasm may represent misfolded molecules destined for degradation.