Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Peter J. Ashton"'
Publikováno v:
South African Journal of Science, Vol 106, Iss 3/4 (2010)
The South African perspective on nanotechnology, recently articulated through its national strategy, envisages nanotechnology to provide solutions to some of the country’s key development challenges, such as the provision of safe water and the inno
Externí odkaz:
https://doaj.org/article/8f5d333e1b0940af87b33fbe9126fff8
Publikováno v:
Ecology and Society, Vol 11, Iss 1, p 4 (2006)
Sustainable ecosystem management relies on a diverse and multi-faceted knowledge system in which techniques are continuously updated to reflect current understanding and needs. The challenge is to minimize delay as ideas flow from intent through scie
Externí odkaz:
https://doaj.org/article/360344dc102c48a397c159b923d3217c
Autor:
Ndeke Musee, Peter J. Ashton, Walter Wilhelm Focke, A-M. Botha, Paul Kiprono Chelule, Paul J Oberholster
Publikováno v:
Ecotoxicology and Environmental Safety. 74:416-423
Studies were conducted to determine the effects of a panel of seven nanomaterials (NMs), namely: α-alumina, γ-alumina, precipitated silica; silica fume, calcined silica fume, colloidal antimony pentoxide (Sb(2)O(5)), and superfine amorphous ferric
Autor:
Peter J. Ashton
Publikováno v:
Aquatic Conservation: Marine and Freshwater Ecosystems. 20:489-493
Copyright: 2010 Wiley-Blackwell. This is a preprint of an article whose final form has been published in the Aquatic Conservation: Marine and Freshwater Ecosystems Journal, Vol 20(5), pp 489–493, available at http://www3.interscience.wiley.com/cgi-
Publikováno v:
Ecotoxicology and Environmental Safety. 73:326-335
The relationships between water quality and the phytoplankton community within Lake Loskop were studied during the late summer and autumn of 2008 to evaluate the impacts of acid mine drainage and high nutrient concentrations. The higher concentration
Publikováno v:
Hydrology and Earth System Sciences. 13:1967-1977
The concept of virtual water encourages a country to view agricultural crops in terms of the amount of water required to produce those crops, with a view to implementing trading policies that promote the saving of scarce water resources. Recently, in
Autor:
Jeanne L. Nel, Robin Abell, Michelle Thieme, Joshua H. Viers, Dirk J. Roux, Richard M. Cowling, Peter J. Ashton, Jonathan V. Higgins
Publikováno v:
Aquatic Conservation: Marine and Freshwater Ecosystems. 19:474-485
1. Freshwater ecosystems and their associated biota are among the most endangered in the world. This, combined with escalating human pressure on water resources, demands that urgent measures be taken to conserve freshwater ecosystems and the services
Publikováno v:
Journal of Contemporary Water Research & Education. 135:28-35
Most modern approaches to water resource management acknowledge that the entire river basin or catchment should form the basic management unit if water resources are to be managed effectively and efficiently. In addition, since surface and ground wat
Publikováno v:
Fundamental and Applied Limnology. 174:271-282
Data generated during 12 fitrips in 2006 were used to investigate possible changes in the biota com- munities of Lake Tswaing after a borehole was sunk in 1988/89 near the centre of the crater lake. The Tswaing meteorite crater lake is a small (0.07
Publikováno v:
Ecological Economics. 68:1074-1082
Research on the flow of virtual water associated with agricultural crop production and trade has focussed almost entirely on water quantity. It is pertinent to consider and quantify the opportunity costs in terms of reduced water quality associated w