998 resultados para photochemical loss photosynthesis


Relevância:

20.00% 20.00%

Publicador:

Resumo:

Estudia la asombrosa capacidad de la plantas para convertir la luz solar en energía. Ayuda a los estudiantes de entre once y catorce años a entender porque las hojas son anchas y planas, porque los árboles de hoja perenne se mantienen verdes durante el invierno, y la jerarquía que existe en la cadena alimentaria.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

In recent years, some epidemiologic studies have attributed adverse effects of air pollutants on health not only to particles and sulfur dioxide but also to photochemical air pollutants (nitrogen dioxide and ozone). The effects are usually small, leading to some inconsistencies in the results of the studies. Furthermore, the different methodologic approaches of the studies used has made it difficult to derive generic conclusions. We provide here a quantitative summary of the short-term effects of photochemical air pollutants on mortality in seven Spanish cities involved in the EMECAM project, using generalized additive models from analyses of single and multiple pollutants. Nitrogen dioxide and ozone data were provided by seven EMECAM cities (Barcelona, Gijón, Huelva, Madrid, Oviedo, Seville, and Valencia). Mortality indicators included daily total mortality from all causes excluding external causes, daily cardiovascular mortality, and daily respiratory mortality. Individual estimates, obtained from city-specific generalized additive Poisson autoregressive models, were combined by means of fixed effects models and, if significant heterogeneity among local estimates was found, also by random effects models. Significant positive associations were found between daily mortality (all causes and cardiovascular) and NO2, once the rest of air pollutants were taken into account. A 10 μg/m3 increase in the 24-hr average 1-day NO2 level was associated with an increase in the daily number of deaths of 0.43% [95% confidence interval(CI), –0.003–0.86%] for all causes excluding external. In the case of significant relationships, relative risks for cause-specific mortality were nearly twice as much as that for total mortality for all the photochemical pollutants. Ozone was independently related only to cardiovascular daily mortality. No independent statistically significant relationship between photochemical air pollutants and respiratory mortality was found. The results in this study suggest that, given the present levels of photochemical pollutants, people living in Spanish cities are exposed to health risks derived from air pollution

Relevância:

20.00% 20.00%

Publicador:

Resumo:

This paper discusses a survey undertaken to review information on hearing loss distributed by St. Louis area hospitals and pediatricians.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

This dissertation examines the frequency response that results in the maximum level of speech intelligibility for persons with noise-induced hearing loss.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

This paper examines the effect of amplification bandwidth on speech intelligibility using multiple speech samples.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The purpose of this project was to determine if subjects with symmetrical hearing loss who prefer a monaural hearing aid fit to a binaural hearing aid fit may demonstrate an auditory processing disorder causing them to experience binaural interference when fit binaurally.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

This Study examines the relationship between scores on adolescents’ self-generated narratives and standardized reading-comprehension scores. This relationship is also compared with the more simple language metrics: vocabulary and syntax.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The recent discovery of the contribution of alpha synuclein in the auditory system prompted further investigation of its functional role. Auditory brainstem response (ABR) and gap detection testing were completed on wild-type and transgenic M83 mice to assess the role of alpha synuclein in noise-induced hearing loss and central auditory function.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

This paper reviews parental reactions to their newborn newly diagnosed with a hearing loss.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Literature and research were gathered and analyzed to determine the impact UHL has on a child’s education, speech and language development. The effects of early intervention and amplification were also analyzed.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

This paper discusses a study to compare two tests of loss of capacity to hear speech.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

This paper identifies risk factors associated with hearing loss in newborns, including family history, craniofacial abnormalities, and ototoxic medications.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

This paper presents a study investigating how informed pediatricians are about hearing loss and their ability to assist and refer parents of children with hearing loss.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The "Pediatric Assessment of Hearing" questionnaire was developed to evaluate how children with high-frequency hearing loss perform in various listening conditions.