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Resultados 51-60 de 347
Air pollution
1998
Wark, Kenneth | Warner, Cecil Francis | Davis, Wayne T.
The identification of Chrysochromulina and Prymnesium species (Haptophyta, Prymnesiophyceae) using fluorescent or chemiluminescent oligonucleotide probes Texto completo
1998
Simon, N. | Brenner, J. | Edvardsen, B. | Medlin, Linda
Global policy on sustainable agriculture: a 2020 vision Texto completo
2012 | 1998
Pinstrup-Andersen, Per; Pandya-Lorch, Rajul | http://orcid.org/0000-0003-3552-7382 Pandya-Lorch, Rajul;
Non-PR | IFPRI4; 2020 | DGO
Mostrar más [+] Menos [-]Indoor pollution
1998
Miller, E. Willard (Eugene Willard) | Miller, Ruby M.
Discusses the health hazards of indoor air contaminants and includes information on their sources, the illnesses they can cause, the ways of controlling them, and other related topics.
Mostrar más [+] Menos [-]Agricultural pesticide residues in oysters and water from two Chesapeake Bay tributaries Texto completo
1998
Lehotay, S.J. | Harman-Fetcho, J.A. | McConnell, L.L.
Little is known of the impact of agricultural activity on oysters in Chesapeake Bay tributaries. As a preliminary assessment of pesticide residues in oyster tissues, this study monitored more than 60 pesticides in oysters and overlying water in two tributaries of the Chesapeake Bay. Paired water and oyster samples were collected throughout 1997 from the Patuxent and Choptank Rivers which discharge into opposite shores of the Chesapeake Bay in Maryland. In water, herbicides such as atrazine, simazine, cyanazine, and metolachlor were present throughout the year with individual water concentrations peaking as high as 430 ng/1 in the late spring and summer and subsiding in the fall. These herbicides were not detected in the oysters even when concentrations were highest in the water. Another herbicide, trifluralin, was detected throughout the year at concentrations of less than 0.6 ng/1 and 0.4 ng/g (wet weight) in water and oyster samples, respectively. Several insecticides, such as endosulfans I and II, endosulfan sulfate, chlorpyrifos, α- and γ-HCH, p,p'-DDE, o,p'-DDT, trans-nonachlor, and trans-chlordane were also measured in both oysters and water at low concentrations.
Mostrar más [+] Menos [-][In-situ remediation by oxygen injection of limestone polluted with petrol]
1998
Larsen, L.C.
[Priority tools for remediation of deposits and zonation in the Herning/Ikast area]
1998
Sandersen, P. | Hansen, M.C. | Kuerstein, J.
[Use of an air flow model for dimensioning in-situ plants (vacuum extraction) [MODAIR]]
1998
Hansen, M.C.
[Mapping and elimination of free DNAPL-phase below the groundwater table]
1998
Christensen, A.G. | Fischer, E.V. | Aktor, H. | Jensen, J.D. | Jensen, C.B.
Biological transformation of phenols in a sandstone aquifer
1998
Broholm, M.M. | Arvin, E. (Danmarks Tekniske Univ., Lyngby (Denmark))
