7 research outputs found
Structural variations among monocot emergent and amphibious species from lakes of the semi-arid region of Bahia, Brazil
Temporary lakes are common in the semi-arid region of the State of Bahia and form water mirrors in the rainy season. In this period, various vegetal species appear having different life forms adapted to the seasonality conditions of the rainfall regime. This work surveyed the adaptive anatomical structures of some emergent and amphibious monocot species occurring in these lakes. We studied the anatomy of roots, rhizomes, leaves and scapes of Cyperus odoratus, Oxycaryum cubense, Pycreus macrostachyos (Cyperaceae) - amphibious species; and of Echinodorus grandiflorus (Alismataceae), Eichhornia paniculata (Pontederiaceae) and Habenaria repens (Orchidaceae) - emergent species. The anatomical features of the dermal, fundamental and vascular systems confirming the tendency of the adaptive convergence of these plants to temporary lacustrine the environment include: single layered epidermal cells with a thin cuticle layer in the aerial organs; the presence of air canals in all the organs; few or no supporting tissues; and less numerous conducting elements and thinner cell walls in the xylem. The reduction of the supporting tissues, the number of stomata, which can even be absent, and the number of conducting elements and the degree of cell wall lignification in the xylem of the emergent species is more accentuated than that of the amphibious species. The pattern of distribution of aerenchyma in the roots of the studied species was considered important to distinguish between amphibious and emergent life forms
Knowledge about aids and drugs among undergraduate students in a higher education institution in the state of Paraná El conocimiento sobre sida y drogas entre alumnos de graduación de una institución de enseñanza superior en el estado de Paraná Conhecimento sobre aids e drogas entre alunos de graduação de uma instituição de ensino superior do estado do Paraná
The main objective of this study was to measure the knowledge of undergraduate nursing students about Acquired Immunodeficiency Syndrome (AIDS) and drugs. The study was carried out in 2007 with a random sample of 289 undergraduate students at a State University in the Northwest of Paraná, Brazil. The students self-applied a questionnaire validated by experts. Questions were divided into three levels of complexity: low, average and high. The level of correct answers was higher in the questions of low complexity, diminishing as the questions' complexity increased. Thirteen percent of questions concerning risk factors and vulnerability to HIV infection among injection drug users (IDU) and biological material for diagnosis of AIDS was correctly answered by 90% of students. Students possessed knowledge concerning AIDS and drugs, however such knowledge was considered insufficient, showing lack of information and gaps in education with a dissociation of interdisciplinary and inter-curricular content.<br>Este trabajo tuvo como principal objetivo investigar el conocimiento de universitarios sobre el sÃndrome de inmunodeficiencia adquirida (SIDA) y drogas. La investigación se realizó en el año 2007 a partir de una muestra aleatoria de 289 alumnos de los cursos de graduación de una facultad estatal de la región noroeste de Paraná, en Brasil. Los alumnos respondieron un cuestionario auto aplicable, validado por especialistas del área. Las preguntas fueron divididas en tres niveles de complejidad: baja, media y alta. El Ãndice de aciertos de los alumnos fue mayor en las preguntas de baja complejidad, disminuyendo con el aumento del grado de complejidad. El Ãndice de 90% de aciertos ocurrió en 13% de las preguntas, que se referÃan a los factores de riesgo y vulnerabilidad para la infección por el virus de la inmunodeficiencia humana (HIV) en usuarios de drogas inyectables (UDI) y el material biológico para el diagnóstico de SIDA. Los alumnos poseÃan conocimientos sobre SIDA y drogas, sin embargo, este es insuficiente, demostrando falta de información y vacÃos en la enseñanza, con disociación de contenidos interdisciplinares e intercurriculares.<br>Este trabalho teve como principal objetivo investigar o conhecimento de universitários sobre a sÃndrome de imunodeficiência adquirida (AIDS) e drogas. Realizou-se a pesquisa no ano 2007 a partir de amostra aleatória de 289 alunos dos cursos de graduação de uma faculdade estadual da região noroeste do Paraná. Os alunos responderam um questionário autoaplicável, validado por especialistas na área. As questões foram divididas em três nÃveis: baixa, média e alta complexidade. O Ãndice de acertos dos alunos foi maior nas questões de baixa complexidade, diminuindo com o aumento do grau de complexidade. O Ãndice de 90% de acertos ocorreu em 13% das questões, que se referiam aos fatores de risco e vulnerabilidade para a infecção pelo vÃrus da imunodeficiência humana (HIV) em usuários de drogas injetáveis (UDI) e o material biológico para o diagnóstico de AIDS. Os alunos possuÃam conhecimento sobre AIDS e drogas, porém, insuficiente, demonstrando falta de informação e lacunas no ensino, com dissociação de conteúdos interdisciplinares e intercurriculares