نتایج جستجو برای: ferruginous composition
تعداد نتایج: 260148 فیلتر نتایج به سال:
Grassland and shrubland birds are declining globally due in part to anthropogenic habitat modification. Because population performance of these species is also influenced by non-anthropogenic factors, it is important to incorporate all relevant ecological drivers into demographic models. We used design-based sampling and occupancy models to test relationships of environmental factors that influ...
Article history: Received 7 November 2016 Received in revised form 2 March 2017 Accepted 5 March 2017 Available online xxxx A global rise in oxygen levels has been proposed to coincidewith the Ediacaran to Cambrian radiation of animals, yet the precise timing and nature of this change remains unresolved. One hypothesis is that the ocean/atmosphere system became temporarily well-oxygenated in th...
The uncoated and coated fibre load in bronchoalveolar lavage (BAL) fluid was assessed using light microscopy, scanning electron microscopy, and x ray microanalysis in 15 subjects with previous, unprotected exposure to asbestos, including three with clinical and radiological evidence of asbestosis, and in 13 urban dwelling control subjects with no known occupational exposure to asbestos. The mea...
Although the main prehistoric color used for paintings is red, knowledge of this coloring matter often boils down to saying that it “ochre.” However, red Prehistory numerous and may have been subject various preparations, mixtures, or even alterations. Understanding use transformation raises questions about technical processes but also supply strategies these ancient societies. In case analysis...
In Lake Matano, Indonesia, the world's largest known ferruginous basin, more than 50% of authigenic organic matter is degraded through methanogenesis, despite high abundances of Fe (hydr)oxides in the lake sediments. Biogenic CH₄ accumulates to high concentrations (up to 1.4 mmol L⁻¹) in the anoxic bottom waters, which contain a total of 7.4 × 10⁵ tons of CH₄. Profiles of dissolved inorganic ca...
P.inna, a Hindoo female, a^e;l between GO and 70 years, was admitted into the Srinagar Dispensary on the 18th of November 1879. For the last five years she had completely lost the use of her eyes owing to senile cataract. She was very weak. In order to improve her health I gave her nourishing food and ferruginous tonics till the 23rd idem, when she was laid on the table for operation. The lens ...
The Cretaceous period (~145–65 m.y. ago) was characterized by intervals of enhanced organic carbon burial associated with increased primary production under greenhouse conditions. The global consequences of these perturbations, oceanic anoxic events (OAEs), lasted up to 1 m.y., but short-term nutrient and climatic controls on widespread anoxia are poorly understood. Here, we present a high-reso...
Research subject. Fe- and Al-rich metapelites of the Teya, Garevka Angara complexes North Yenisei Ridge (western margin Siberian craton) were studied. methods. Recently-obtained geochronologic (SHRIMP II U-Pb zircon dating) geochemical data on distribution major trace elements used to reproduce composition age protolith, along with paleofacies formation conditions. Results. The ferruginous-alum...
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