نتایج جستجو برای: water and earth
تعداد نتایج: 16943378 فیلتر نتایج به سال:
Introduction: Chondrites have been used to ascertain the Earth abundances of all but the most volatile elements. Of these, H abundance has dramatic ramifications for the properties of the planet, including rheology and melting relations of the mantle and density and phase relations in the core, yet is poorly known. The very mechanisms of formation of Earth and degassing history depend on the am...
Diatomaceous earth was modified by in situ precipitation of metallic hydroxides. Modification decreased the negative charge on the diatomaceous earth and increased its ability to adsorb viruses in water. Electrostatic interactions were more important than hydrophobic interactions in virus adsorption to modified diatomaceous earth. Filters containing diatomaceous earth modified by in situ precip...
The quest for Earth-like planets is a major focus of current exoplanet research. Although planets that are Earth-sized and smaller have been detected, these planets reside in orbits that are too close to their host star to allow liquid water on their surfaces. We present the detection of Kepler-186f, a 1.11 ± 0.14 Earth-radius planet that is the outermost of five planets, all roughly Earth-size...
The motivation of this work is to create luminescent rare earth/polymer films with outstanding water-resistance and superhydrophobicity. Specifically, the emulsion polymerization of styrene leads to core particles. Then core-shell-structured polymer nanoparticles are synthesized by copolymerization of styrene and acrylic acid on the core surface. The coordination reaction between carboxylic gro...
Earth is a water planet, but how much water exists on and in the Earth? Is the water limited to the Earth’s surface and limited depths of our planet (molecular water of the hydrosphere), or do deep reservoirs of hydrogen and oxygen really exist as proposed in recent works but not yet proven? Due to the importance of H2O for life and geological processes on the Earth, these questions are among t...
Earth dam is a structure as homogeneous or non-homogeneous forms for raising water level or water supply. Earth dam consist of different parts that one of the main parts is clay core. Choosing an optimal non permeable core which causes reduction of seepage through dam body and also being stable is necessary. The objective of this research is to optimize the geometry of earth dam clay core such ...
making an investigation into the traditional architecture found in iran’s kavir, one can see an architecture that has emerged by merely changing the form of the face of the earth; this [complex] architecture is nothing but an intellectual use of simple land and water which simultaneously accords with the islamic environmental principles [ieps]. in this article, following a descriptive analysis ...
Cosmology has been formulated with four cosmic elements Water, Earth, Air and Heat (Fire). They are really the raw materials of creation. As final products in man there is Body, Spirit. and Soul. As ino-qanic substances they would be Salt, Mercury and Sulphur. But these as forms of matter would be Solid, Liquid and Gas (potentially). Thus the Tria Prima of Paracelsus is justifiable as represent...
Those magnificent pictures of Earth from space, among the most humanly important and evocative results from the placing of manned and unmanned satellites in orbit during the last several decades, have shown us that underneath the clouds most of the world is blue. Viewed in this way from space, Earth is seen as a planet covered mostly by water, and most of that water is seawater. This thin layer...
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