搜索结果: 1-15 共查到“地质学 forms”相关记录15条 . 查询时间(0.065 秒)
The forms of plant nutrient elements in Australian native plant ash derived from several species and the incubation effects on soil
forms plant nutrient elements Australian native plant ash derived several species the incubation effects soil
2012/3/30
Wildfires and prescribed fires burn many thousand of hectares of forest annually (Ulery et al., 1996). The intensity of forest burning is related to weather conditions, amount of fuel available and th...
The role of mineral surfaces in the preservation and transformation of organic carbon: meso- to nano– scale spatial complexity of organic matter forms in organic-rich shales
mineral surfaces preservation transformation organic carbon meso- to nano– scale spatial complexity organic matter forms organic-rich shales
2012/3/30
Sequestration of organic matter (OM) in sediments is a fundamental biogeochemical process that regulates planetary temperature, the flux of free oxygen to the atmosphere and oceans, and the distributi...
A Study on Spatial Forms Characteristic of the Historic Towns in Yuan River Basin
Historic Towns Hunan Province Space Form Yuan River Basin
2011/12/20
The historic towns in Yuan River basin, with the same origin in water and mountain, has similar geographical environment, interlinked regional economy and inclusive multi-ethnic culture, all of which ...
Relationship Between Soil Potassium Forms and Mineralogy in Highly Calcareous Soils of Southern Iran
Arid Illite Calcium carbonate Exchangeable K HNO -extractable K
2011/11/11
Thirty seven soil samples collected from arid and semiarid regions of southern Iran were studied to determine the different forms of potassium and their relation with clay mineralogy and other soil pr...
Growth forms and distribution patterns of stromatoporoids exposed on Devonian palaeobottom surfaces;Holy Cross Mountains,central Poland
Stromatoporoids Morphometry Parameterization Palaeobottom surfaces
2009/10/20
Well preserved palaeobottomsurfaceswith stromatoporoids are exposed in twoDevonian localities in theHoly Cross Mountains in central Poland: Skały and Bolechowice-Panek quarries. The stromatoporoi...
Stability of n-Butylammonium Vermiculite in Powder and Flake Forms
Adsorption Degradation Interaction Intercalation Complex Interstratified Phase n-Butylammonium Organo-Vermiculite Particle Size Vermiculite
2011/12/9
Abstract: Interaction between n-butylammonium (BA) chloride and vermiculite from Santa Olalla (Spain) has been studied in large flake (5 × 5 × 0.1 mm) or ground powder (≤80 µm) samples. The diff...
Mechanism of Adsorption and Desorption of Water Vapor by Homoionic Montmorillonite: 3. the Mg2+, Ca2+, Sr2+ and Ba2+ Exchanged Forms
Adsorption Desorption Earth-Alkaline Cations Immersion Microcalorimetry Montmorillonite Relative Humidity Surface Area X-ray Diffraction
2011/12/1
Abstract: The swelling of some well-defined Mg-, Ca-, Sr- and Ba- homoionic montmorillonites was studied in the domain of water relative pressures lower than 0.95. This involves the expansion of the c...
Effect of Heating on Swelling and Dispersion of Different Cationic Forms of a Smectite
Cationic Clay Bonding Dispersion Particle Charge Swelling Thermal Treatment X-ray Diffraction
2011/12/27
The effect of heat treatments on the swelling, dispersion, particle charge and particle aggregation of Li-, Na-, K-, Mg-, Ca- and Al-Wyoming bentonite was investigated. Before thermal treatment, unhea...
Thermochemistry of natural potassium sodium calcium leonhardite and its cation-exchanged forms
Thermochemistry potassium sodium calcium leonhardite cation-exchanged forms
2012/4/6
Leonhardite, a partially dehydrated laumontite, and its alkali variety, primary leonhar-dite, have been studied byhigh-temperature calorimetry. The enthalpies offormation from oxides and elements at 2...
Mechanism of Adsorption and Desorption of Water Vapor by Homoionic Montmorillonites: 2. The Li+, Na+, K+, Rb+, and Cs+-Exchanged Forms
Adsorption Desorption Exchangeable cations Immersion microcalorimetry Montmorillonite Relative humidity Surface area XRD
2011/12/28
Methods previously used to distinguish between water adsorbed on external surfaces and in the interlamellar space of Na-montmorillonite during adsorption and desorption of water vapor have been extend...
Adsorption of Water by Homoionic Exchange Forms of Wyoming Montmorillonite (SWy-1)
Adsorption Enthalpy Entropy Montmorillonite Relative humidity Water
2012/1/5
Adsorption isotherms for water on homoionic (Ca2+, Li+, Na+, and K+) exchanged forms of Crook County, Wyoming, montmorillonite (CMS Source Clay SWy-1) were measured between 25° and 70°C using a vacuum...
Thermal Behavior of Hydrotalcite and of Anion-Exchanged Forms of Hydrotalcite
Anion exchange Brucite Hydrotalcite Interstratification Perchlorate Thermal reaction
2012/2/8
Chloride-, sulfate-, and perchlorate-exchanged forms of hydrotalcite have been prepared and their layer spacings determined after equilibration in hydrous atmospheres and after heat-treatments up to t...
Properties of Reduced Charge Montmorillonite: Tetra-Alkylammonium Ion Exchange Forms
Montmorillonite Tetra-Alkylammonium Ion Exchange Forms
2012/2/15
Surface properties of reduced charge montmorillonites (RCM) whose exchange capacities were saturated with tetra-alkylammonium cations, were studied with X-ray diffraction, nitrogen, and water adsorpti...
Clayey fragments colored deep bluish-green are widely found in glassy rhyolitic tuffs at Oya, Tochigi Prefecture. In room-air the color changes to black or gray within one hour and finally to brown in...
Titanium as Free Oxide and Substituted Forms in Kaolinites and Other Soil Minerals
Titanium Free Oxide Substituted Forms Kaolinites Soil Minerals
2012/2/20
Titanium in TiO2 minerals was differentiated from that isomorphously substituted into minerals by the use of dihydrogen hexafluorotitanate (hydrofluotitanic acid, H2TiF6), which selectively dissolved ...