Warmth And Temperature
Mostrando 1-8 de 8 artigos, teses e dissertações.
-
1. Elaboração e aplicação de uma estratégia de ensino sobre os conceitos de calor e de temperatura
Este trabalho investigou as concepções alternativas apresentadas por alunos do Ensino Médio, em relação aos conceitos de calor e de temperatura, objetivando a elaboração e aplicação de uma estratégia de ensino a partir do diagnóstico levantado das concepções presentes nos estudantes. A estratégia de ensino foi constituída por uma seqüência d
Publicado em: 2007
-
2. Anatomical study of the renal portal system and its implications in the use of anesthetic agents in the restraint of ostriches (Struthio camelus) / Estudo anatômico do sistema porta renal e suas implicações no emprego de agentes anestésicos na contenção de avestruzes (Struthio camelus)
The aim of this study was to characterize the anatomy of the renal portal system and to verify its influence on the anesthetic protocol xylazine, tiletamine and zolazepam in the restraint of ostriches, comparing the drugs administration in the muscles of the leg or of the wing. For the anatomical study, it was injected, in five animals, latex in the femoral
Publicado em: 2006
-
3. A model of the detection of warmth and cold by cutaneous sensors through effects on voltage-gated membrane channels
Warmth and cold sensations are known to derive from separate warm and cold cutaneous thermoreceptors in the form of differentiated afferent nerves. The firing rate of warm-sensing nerves increases as the temperature increases; the firing rate of cold-sensing nerves increases if the temperature is reduced. I postulate that the primary sensitivity of the warm
The National Academy of Sciences.
-
4. Molecular and structural composition of phospholipid membranes in livers of marine and freshwater fish in relation to temperature.
The compositions and physical states of the liver phospholipids of marine and freshwater fish adapted to relatively constant but radically different temperatures were investigated. Fish adapted to low temperature (5-10 degrees C) accumulated more unsaturated fatty acids than those in a warm (25-27 degrees C) environment. There were no measurable differences
-
5. Graded assessment and classification of impaired temperature sensibility in patients with diabetic polyneuropathy.
Thermal sensibility was quantitatively assessed in the feet of 46 diabetic patients. In subjects with sensibility deficits the perception threshold for warmth or cold, or of heat pain, was either increased or lost. Four stages of impaired thermal sensibility were defined, and a classification of dysfunction is proposed which could be useful in routine clinic
-
6. Pronounced climatic variations in Alaska during the last two millennia
Paired oxygen-isotopic analyses of abiotic carbonate and benthic-ostracode shells from lake sediments provide a continuous quantitative record of growing-season temperature for the past 2000 years in the northwestern foothills of the Alaska Range. This record reveals three time intervals of comparable warmth: anno Domini (A.D.) 0–300, 850-1200, and post-18
The National Academy of Sciences.
-
7. Temperature and vibration thresholds in vibration syndrome.
In a study to investigate whether the quantitative assessment of temperature and vibration thresholds can improve the evaluation of the neurological symptoms in vibration syndrome 37 patients with neurological symptoms (paraesthesias, numbness, pain) in the hands who had worked with hand held vibrating tools and 46 healthy controls not exposed to vibration w
-
8. Functional and topographical properties of field potentials evoked in rat dorsal horn by cutaneous C-fibre stimulation.
Extracellular field potentials in the lumbosacral dorsal horn evoked by stimulation of cutaneous C fibres in the sural nerve were explored in the halothane-anaesthetized rat. C-fibre-evoked field potentials were prominent in lamina II and lamina V of the dorsal horn. These potentials had a latency of 80-130 ms and a duration of more than 200 ms. A peak in th