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971.
Kai-Lai G. Ho Anthony L. Pometto III Paul N. Hinz Arnoldo Gadea-Rivas Jorge A. Briceño Augusto Rojas 《Journal of Polymers and the Environment》1999,7(4):167-172
For use by the banana industry of Costa Rica, polylactic acid (PLA) plastic ropes and banana finger shrouds must remain operational for 14 to 16 weeks, and they also must be able to break down in the soil after serving their purposes. The banana field at La Rebusca Farm (Costa Rica) and the experiment station at University of Costa Rica were selected for a field exposure study of Cargill EcoPla Generation II (GII) and Cargill EcoPla monolayer (Ca-I) PLA films. The average monthly temperature, relative humidity, and cumulative rainfall of the La Rebusca Farm and the University of Costa Rica site were 26 and 22°C, 92 and 84%, and 352 and 177 in., respectively. The PLA plastic films at the La Rebusca Farm lost their mechanical properties earlier than at the University of Costa Rica site because of the higher temperature and relative humidity of the banana farm. The Ca-I film meets the 14-week operational time frame and it is recommended for further studies as ropes and banana shrouds. 相似文献
972.
Alfredo Mahar Lagmay Jerico Mendoz Fatima Cipriano Patricia Anne Delmendo Micah Nieves Lacsaman Marc Anthony Moises Nicanor Pellejera III Kenneth Ni?o Punay Glenn Sabio Laurize Santos Jonathan Serrano Herbert James Taniz Neil Eneri Tingin 《环境科学学报(英文版)》2017,29(9):39-47
Urban floods from thunderstorms cause severe problems in Metro Manila due to road traffic. Using Light Detection and Ranging (LiDAR)-derived topography, flood simulations and anecdotal reports, the root of surface flood problems in Metro Manila is identified. Majority of flood-prone areas are along the intersection of creeks and streets located in topographic lows. When creeks overflow or when rapidly accumulated street flood does not drain fast enough to the nearest stream channel, the intersecting road also gets flooded. Possible solutions include the elevation of roads or construction of well-designed drainage structures leading to the creeks. Proposed solutions to the flood problem of Metro Manila may avoid paralyzing traffic problems due to short-lived rain events, which according to Japan International Cooperation Agency (JICA) cost the Philippine economy 2.4 billion pesos/day. 相似文献
973.
Pinheiro MC Crespo-López ME Vieira JL Oikawa T Guimarães GA Araújo CC Amoras WW Ribeiro DR Herculano AM do Nascimento JL Silveira LC 《Environment international》2007,33(1):56-61
Mercury is a hazardous metal responsible for environmental contamination and human intoxication. Methylmercury, a very toxic organic compound, bio-accumulates through food chain, and is responsible for chronic mercury exposure of riverside Amazonian communities with a diet rich in fish. Uncertainties about the reference exposure dose that could have damaging consequences for nervous system development makes necessary the biomonitoring of these Amazonian populations, especially children. In this work, a comparative study was performed in exposed and non-exposed children living in the Amazon. A total of 168 children were analyzed to find possible correlations between gender, age, location, and hair mercury content. For each location, no statistically significant differences (P<0.05) were detected for gender and age versus mercury content. However, mean mercury levels in hair samples may indicate a tendency of boys to average higher hair concentrations. Also, in the community with highest levels of mercury, the limit of 10 micro g/g of mercury was surpassed by 65% of 2-6 years and 50% of 7-12 years children but only by 27% of 0-1 year babies, pointing to a lower bioaccumulation and/or the existence of a protection mechanism in babies. Log normal distributions of mercury concentrations for each location showed that children from populations under influence of gold mining activity contain the highest mercury levels in hair samples, though this intoxication may have decreased when compared to previous studies. Knowledge originated by this monitoring will better assist in the development of prevention strategies and government actions targeting the mercury contamination of Amazonian environment. 相似文献
974.
Associations between Water Physicochemistry and Prymnesium parvum Presence,Abundance, and Toxicity in West Texas Reservoirs
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Matthew M. VanLandeghem Mukhtar Farooqi Greg M. Southard Reynaldo Patiño 《Journal of the American Water Resources Association》2015,51(2):471-486
Toxic blooms of golden alga (Prymnesium parvum) have caused substantial ecological and economic harm in freshwater and marine systems throughout the world. In North America, toxic blooms have impacted freshwater systems including large reservoirs. Management of water chemistry is one proposed option for golden alga control in these systems. The main objective of this study was to assess physicochemical characteristics of water that influence golden alga presence, abundance, and toxicity in the Upper Colorado River basin (UCR) in Texas. The UCR contains reservoirs that have experienced repeated blooms and other reservoirs where golden alga is present but has not been toxic. We quantified golden alga abundance (hemocytometer counts), ichthyotoxicity (bioassay), and water chemistry (surface grab samples) at three impacted reservoirs on the Colorado River; two reference reservoirs on the Concho River; and three sites at the confluence of these rivers. Sampling occurred monthly from January 2010 to July 2011. Impacted sites were characterized by higher specific conductance, calcium and magnesium hardness, and fluoride than reference and confluence sites. At impacted sites, golden alga abundance and toxicity were positively associated with salinity‐related variables and blooms peaked at ~10°C and generally did not occur above 20°C. Overall, these findings suggest management of land and water use to reduce hardness or salinity could produce unfavorable conditions for golden alga. 相似文献
975.
Bilgili Faik Kuşkaya Sevda Ünlü Fatma Gençoğlu Pelin 《Environmental science and pollution research international》2022,29(24):36189-36207
Environmental Science and Pollution Research - Since export has a key role in economic growth in terms of national production quantity, export quality can be considered another important factor... 相似文献
976.
Kalefetoğlu Macar Tuğçe Macar Oksal Çavuşoğlu Kültiğin Yalçin Emine Yapar Kürşad 《Environmental science and pollution research international》2022,29(40):60508-60518
Environmental Science and Pollution Research - The immense protection potential of plant-derived products against heavy metal toxicity has become a considerable field of research. The goal of the... 相似文献
977.
Pisetta Ane-Mery Roveri Vinicius Guimarães Luciana Lopes de Oliveira Therezinha Maria Novais Correia Alberto Teodorico 《Environmental science and pollution research international》2022,29(42):63099-63111
Environmental Science and Pollution Research - The worldwide occurrence of pharmaceuticals and personal care products (PPCPs) in aquatic ecosystems is reason for public concern. These emerging... 相似文献
978.
Tavella Ronan Adler Fernandes Caroline Lopes Feijo Schimith Lucia Emanueli Volcão Lisiane Martins dos Santos Marina da Silva Júnior Flavio Manoel Rodrigues 《Environmental science and pollution research international》2022,29(49):74335-74345
Environmental Science and Pollution Research - Socioeconomic and demographic factors, lifestyle and cultural characteristics may play an important role in the development of genetic damage. This... 相似文献
979.
Amaral Rafaela Cristina Rohden Abrahão Bernardo Garcez Mônica Regina Andrade Jairo José de Oliveira 《Journal of Material Cycles and Waste Management》2022,24(6):2439-2454
Journal of Material Cycles and Waste Management - Wood biomass fly ash can contribute to a more sustainable urban infrastructure, but requires efficient recycling strategies. This paper... 相似文献
980.
Pekdemir Sibel Özen Öner Ecem Pekdemir Mustafa Ersin Dalkılıç Semih Kadıoğlu Dalkılıç Lütfiye 《Journal of Polymers and the Environment》2022,30(9):3645-3655
Journal of Polymers and the Environment - Poly ε-caprolactone (PCL) synthesized by ring-opening polymerization method, and then it blended with polylactic acid (PLA). The blend was loaded with... 相似文献