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Distribution Characteristics of High-Background Elements and Assessment of Ecological Element Activity in Typical Profiles of Ultramafic Rock Area. [PDF]
ToxicsShi J, Liu J, Hu S, Wang J.
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Physicochemical characterization and industrial use of Awzet Kaolin deposit in Northwestern Ethiopian plateau. [PDF]
Sci RepAli MY.
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Natural selection: Fair weather cooperators
Current Biology, 2022An impressive long-term study of Greater Ani birds reveals fluctuating selection for group size. In wet years, with abundant food, larger groups enjoy greater protection from predators. In dry years, however, larger groups suffer greater nestling mortality relative to smaller groups.
Andrew G, Zink, Bruce E, Lyon
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Characterization of Naturally Weathered Polypropylene Plates
Journal of Macromolecular Science, Part A, 2006The natural outdoor ageing of thick plates of isotactic polypropylene is investigated. Different techniques (infrared spectroscopy, thermal analysis, scanning electron microscopy, and mechanical tests) are used in order to obtain a comprehensive view of the modifications occurring during the environmental ageing.
R. Gallo +3 more
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Fuel, 1984
Abstract The effects of weathering on the mean maximum vitrinite reflectance, moisture content, and low-temperature ash mineralogy of the low volatile bituminous, Lower Mississippian Price Formation coals of southwest Virginia were determined on samples from depth profiles of three weathered coal beds.
Gayle R. Ingram, J.Donald Rimstidt
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Abstract The effects of weathering on the mean maximum vitrinite reflectance, moisture content, and low-temperature ash mineralogy of the low volatile bituminous, Lower Mississippian Price Formation coals of southwest Virginia were determined on samples from depth profiles of three weathered coal beds.
Gayle R. Ingram, J.Donald Rimstidt
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1972
The final test of a paint is its performance under actual conditions of use. For exterior paints, this means on the walls of buildings, railway cars, highway vehicles, ships, and the like. Such tests are expensive and time consuming. Hence, there has developed the practice of conducting tests on a small scale. These screening tests allow studies of the
NB Garlock, GG Sward
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The final test of a paint is its performance under actual conditions of use. For exterior paints, this means on the walls of buildings, railway cars, highway vehicles, ships, and the like. Such tests are expensive and time consuming. Hence, there has developed the practice of conducting tests on a small scale. These screening tests allow studies of the
NB Garlock, GG Sward
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Weathering and weathering rates of natural stone
Environmental Geology and Water Sciences, 1987Physical and chemical weathering were studied as separate processes in the past. Recent research, however, shows that most processes are physicochemical in nature. The rates at which calcite and silica weather by dissolution are dependent on the regional and local climatic environment.
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Natural Weathering Studies of Polypropylene
Journal of Polymers and the Environment, 2009Polypropylene (PP) has achieved a dominating position and hence, their consumption increases thereby littering, which lead to environmental pollution. Photodegradation seems to be a better choice because of naturally available sunlight as energy source for degradation.
K. Rajakumar +4 more
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Controlled Temperature Natural Weathering
2008The development of new or improved products necessarily requires meeting a wide range of economic, operational, and performance criteria. Each presents its own difficulties but issues involving durability carry the added problem of a long time scale and thus become a potential bottleneck in bringing products to the marketplace.
Anthony Buxton +3 more
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Long‐term natural weathering of coated ThermoWood
Pigment & Resin Technology, 2000Heat treatment reduces hygroscopicity and accompanying dimensional changes in wood. Prior to coating, pine and spruce boards were heat treated at 225°C for six hours under steam, in order to achieve dimensional stability and durability of wood substrate.
Ahola, Pirjo +3 more
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