نتایج جستجو برای: pollution intensity
تعداد نتایج: 249745 فیلتر نتایج به سال:
We present a novel microbial whole-cell sensing system for biodefense and environmental pollution monitoring. Real time water toxicity monitoring is achieved using genetically engineered E. coli bioluminescent cells which emit light when exposed to toxic materials. The illumination intensity and its time dependence are a function of the toxicants dose and type. The bacteria are immobilized in a...
Coral reefs are highly dynamic ecosystems that are regularly exposed to natural perturbations. Human activities have increased the range, intensity, and frequency of disturbance to reefs. Threats such as overfishing and pollution are being compounded by climate change, notably warming and ocean acidification. Elevated temperatures are driving increasingly frequent bleaching events that can lead...
While microbial nitrogen transformations in soils had been known to be affected by heavy metal pollution, changes in abundance and community structure of the mediating microbial populations had been not yet well characterized in polluted rice soils. Here, by using the prevailing molecular fingerprinting and enzyme activity assays and comparisons to adjacent non-polluted soils, we examined chang...
BACKGROUND Several studies have found an effect on mortality of between-city contrasts in long-term exposure to air pollution. The effect of within-city contrasts is still poorly understood. OBJECTIVES We studied the association between long-term exposure to traffic-related air pollution and mortality in a Dutch cohort. METHODS We used data from an ongoing cohort study on diet and cancer wi...
BACKGROUND Short-term exposure to air pollution has adverse effects among patients with asthma, but whether long-term exposure to air pollution is a cause of adult-onset asthma is unclear. OBJECTIVE We aimed to investigate the association between air pollution and adult onset asthma. METHODS Asthma incidence was prospectively assessed in six European cohorts. Exposures studied were annual a...
Acute and chronic respiratory diseases, which are causally linked to exposure to indoor air pollution in developing countries, are the leading cause of global morbidity and mortality. Efforts to develop effective intervention strategies and detailed quantification of the exposure-response relationship for indoor particulate matter require accurate estimates of exposure. We used continuous monit...
Beached bird surveys have been widely used to monitor the impact of oil pollution in the oceans. However, separating the combined effects of oil pollution, environmental variables and methodological aspects of beach monitoring on seabird stranding patterns is a challenging task. The effects of a comprehensive set of oceanographic and climatic variables and oil pollution on seabird strandings in...
In this paper we investigate the effect of the Delhi Metro, an intra-city mass rail transit system, on air pollution within Delhi. To identify effects on pollution, we exploit the discontinuous jumps in metro ridership, each time the network is extended. Our identifying assumption is that in the absence of the extension there would be a smooth transition in pollution levels. We find strong evid...
Plants are generally subjected to a combination of different conditions such as magnetic field and soil bacteria in their life. The present investigation tried to compare the effects and interactions of magnetic field and rhizobial inoculant in alfalfa. A pot experiment was performed under a natural condition by a factorial design to ...
Pollution due to auto exhaust has assumed menacing proportion in the developing countries like India, where its contribution is nearly 45% 75 % of the total air pollution in urban areas, Ooty the Head Quarters of Nilgiris Districts has a large Number of commercial and non-commercial vehicles, due to increasing industrialization and Tourism related activities. In this thesis a study was conducte...
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