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151.
Lara Bruna Rage Baldone de Andrade Paulo Sérgio Guimarães Junior Mario Dias Marali Vilela Alcântara Lizzy Ayra Pereira 《Journal of Polymers and the Environment》2021,29(8):2397-2408
Journal of Polymers and the Environment - The current global proposal for withdrawing polymers with high resistance to degradation and from fossil sources from disposable appliances, as well as the... 相似文献
152.
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154.
As part of a study of the predictive utility of employee preferences for forms of supervisory inducements, a sample of 236 administrators and first-line supervisors provided survey data regarding their individual superiors. The respondents' statements of preferred forms of social influence from their superiors were statistically adjusted for the reported level of influence used in order to determine more precisely whether discrepancies between actual and preferred forms of influence could uniquely predict criterion variance. Results indicated that these adjusted discrepancy values were inversely correlated with satisfaction with supervision, ingroup status, and superior's considerate-ness. These supportive results suggest that discrepancies between preferences for inducements and reported forms of influence may be an important ingredient in a fuller explanation of the phenomenon of motivation and leadership. 相似文献
155.
Mario Reyes Ortíz Mario Reyes Roman Alejandro Vial Latorre Juan Zamorano Soto 《Disasters》1986,10(2):125-140
Chile is one of the most seismically active countries in the world. Earthquakes are periodic phenomena that test the quality of construction, as well as the capacity of the population to adapt to sharp changes in socio-environ-mental conditions.
Experience in this regard has demonstrated the desirability of being prepared, at the institutional level and at the level of the general population, to carry out investigations and to begin measures to cope with these catastrophes, in order to reduce damage and the interruption of normal life to a minimum.
In this paper some general aspects of the social and health impacts of the earthquake of 3rd March 1985 are examined. The shock affected the central area of Chile which contains 61% of the total population.
The earthquake occurred at 19:50 hours on Sunday, 3rd March, and was of magnitude 7.8. Recorded personal losses included 180 dead and 2,575 injured, and around 200,000 damaged or destroyed dwellings. The destruction also affected the infrastructure of the public services, such as energy, road, telecommunications and water supply, giving rise to an emergency in the provision of assistance.
Special reference is made to the effects, on the health care infrastructure, drinking water supply and, less important, on the behavior of some communicable intestinal diseases that are highly endemic in the area under study. 相似文献
Experience in this regard has demonstrated the desirability of being prepared, at the institutional level and at the level of the general population, to carry out investigations and to begin measures to cope with these catastrophes, in order to reduce damage and the interruption of normal life to a minimum.
In this paper some general aspects of the social and health impacts of the earthquake of 3rd March 1985 are examined. The shock affected the central area of Chile which contains 61% of the total population.
The earthquake occurred at 19:50 hours on Sunday, 3rd March, and was of magnitude 7.8. Recorded personal losses included 180 dead and 2,575 injured, and around 200,000 damaged or destroyed dwellings. The destruction also affected the infrastructure of the public services, such as energy, road, telecommunications and water supply, giving rise to an emergency in the provision of assistance.
Special reference is made to the effects, on the health care infrastructure, drinking water supply and, less important, on the behavior of some communicable intestinal diseases that are highly endemic in the area under study. 相似文献
156.
Although several neurobiological and genetic correlates of aging and behavioral development have been identified in social
insect workers, little is known about how other age-related physiological processes, such as muscle maturation, contribute
to task performance. We examined post-eclosion growth of three major muscles of the head capsule in major and minor workers
of the ant Pheidole dentata using workers of different ages with distinct task repertoires. Mandible closer muscle fibers, which provide bite force and
are thus critical for the use of the mandibles for biting and load carrying, fill the posterio-lateral portions of the head
capsule in mature, older workers of both subcastes. Mandible closer fibers of newly eclosed workers, in contrast, are significantly
thinner in both subcastes and grow during at least the next 6 days in minor workers, suggesting this muscle has reduced functionality
for a substantial period of adult life and thus constrains task performance capability. Fibers of the antennal muscles and
the pharynx dilator, which control antennal movements and food intake, respectively, also increase significantly in thickness
with age. However, these fibers are only slightly thinner in newly eclosed workers and attain their maximum thickness over
a shorter time span in minors. The different growth rates of these functionally distinct muscles likely have consequences
for how adult P. dentata workers, particularly minors, develop their full and diverse task repertoire as they age. Workers may be capable of feeding
and interacting socially soon after eclosion, but require a longer period of development to effectively use their mandibles,
which enable the efficient performance of tasks ranging from nursing to foraging and defense. 相似文献
157.
Jaqueline Bianchi Mario Sérgio Mantovani Maria Aparecida Marin-Morales 《环境科学学报(英文版)》2015,36(10):102-111
Based on the concentration of Malathion used in the field, we evaluated the genotoxic potential of low concentrations of this insecticide on meristematic and F1 cells of Allium cepa and on rat hepatoma tissue culture (HTC cells). In the A. cepa, chromosomal aberrations (CAs), micronuclei (MN), and mitotic index (MI) were evaluated by exposing the cells at 1.5, 0.75, 0.37, and 0.18 mg/mL of Malathion for 24 and 48 hr of exposure and 48 hr of recovery time. The results showed that all concentrations were genotoxic to A. cepa cells. However, the analysis of the MI has showed non-relevant effects. Chromosomal bridges were the CA more frequently induced, indicating the clastogenic action of Malathion. After the recovery period, the higher concentrations continued to induce genotoxic effects, unlike the observed for the lowest concentrations tested. In HTC cells, the genotoxicity of Malathion was evaluated by the MN test and the comet assay by exposing the cells at 0.09, 0.009, and 0.0009 mg/5 mL culture medium, for 24 hr of exposure. In the comet assay, all the concentrations induced genotoxicity in the HTC cells. In the MN test, no significant induction of MN was observed. The genotoxicity induced by the low concentrations of Malathion presented in this work highlights the importance of studying the effects of low concentrations of this pesticide and demonstrates the efficiency of these two test systems for the detection of genetic damage promoted by Malathion. 相似文献
158.
Genesio Mario da Rosa Julia Caetano Manfio Kauane Andressa Flach Alexandre Tiburski Neto Mathias Rezende Mahnke Arci Dirceu Wastowski 《环境质量管理》2023,32(4):301-310
The chrome (Cr) is a metal utilized in various industrial sectors and its investigation in the environment is necessary, for the Cr (III) contain aessential micronutrients in the human nourishment and the Cr (VI), on the other hand, is toxic. In the present work soil contamination with Cr was realized in drainagelysimetersset in concentrations of 0, 200, 400, 600, 800 and 1000 mg kg−1 of total Cr, with the intuition to determine the total Cr and Cr (VI) flux in leached water, in soil and in plants of lettuce (Lactuca sativa L.). In the lysimeters were cultivated four plants, in three cultivation circles. In the end of the cultivations was observed, that the total applied Cr leached in the soil, evidencing the Cr mobility in latossoil with simulant characteristics to the ones utilized in this paper. The Cr (VI) concentrations in the soil increased soon after the treatment applications, but tend to decrees in the time elapse, the same tendences were observed for the total Cr concentrations in the leached water. The Cr absorption by plants was related to the Cr disponibility in the soil, for the soil concentration and the plants decreased with time passing. The Cr mobility in the soil possibilitated the groundwater contamination presenting risks to the water quality and, consequently to public health. 相似文献
159.
Cutroneo Laura Reboa Anna Besio Giovanni Borgogno Franco Canesi Laura Canuto Susanna Dara Manuela Enrile Francesco Forioso Iskender Greco Giuseppe Lenoble Véronique Malatesta Arianna Mounier Stéphane Petrillo Mario Rovetta Ruben Stocchino Alessandro Tesan Javier Vagge Greta Capello Marco 《Environmental science and pollution research international》2020,27(9):8938-8952
Environmental Science and Pollution Research - The European Interreg Italy–France 2014–2020 Maritime Project SPlasH! (Stop to Plastics in H2O!) focused on the study of microplastics... 相似文献
160.
Maximilian Berthold Ulf Karsten Mario von Weber Alexander Bachor Rhena Schumann 《Ambio》2018,47(1):146-158
The EU-water framework directive aims at nutrient reductions, since anthropogenically induced eutrophication is a major threat for coastal waters. However, phytoplankton biomass in southern Baltic Sea coastal water bodies (CWB) remains high and the underlying mechanisms are not well understood. Therefore, a CWB data set was analysed regarding changes in phytoplankton biomass and nutrient concentration of nitrogen (N) and phosphorus (P) from 2000 to 2014. It was expected to find imbalances between produced phytoplankton biomass and total nutrient concentrations. Inner CWB were cyanobacteria-dominated and showed up to five times higher chlorophyll a-concentrations compared to outer CWB with similar total phosphorus-concentrations. Phytoplankton tended to be P-limited during spring and N-limited during summer. Phytoplankton biomass and nutrient concentrations were even higher during very humid years, which indicated a close coupling of the CWB with their catchment areas. This study suggests that re-mesotrophication efforts need to consider the importance of changed phytoplankton composition and nutrient availabilities. 相似文献