搜索结果: 1-15 共查到“理学 pressures”相关记录27条 . 查询时间(0.147 秒)
Overfishing and other human pressures are severely harming many marine protected areas around the world, study finds
ecological destruction edge effect marine conservation areas MPA
2021/8/2
A new study points to a strong 'edge effect' in marine protected areas (MPAs), sharply reducing by 60 percent the fish population living up to 1 - 1.5 km within the MPA. This significantly diminishes ...
The electrical signature of rock samples exposed to hydrostatic and triaxial pressures
Electrical impedance spectroscopy fracturing carbonate amphibolite pressure
2015/9/28
The electrical signature of sedimentary (carbonate) and crystalline rock samples was studied in hydrostatic and triaxial pressure experiments up to 300 MPa. The aim was to establish a relation between...
Decoupling of ground level pressures observed in Italian volcanoes: are they driven by space weather geo-effectiveness?
Atmospheric pressure Space weather Sun storm Volcanoes
2014/3/17
Investigations on correlation drops between near-ground atmospheric pressures measured at sea level and at higher altitudes on Italian volcanoes have been carried out. We looked for perturbations of t...
Ground-State Structures of Ice at High-Pressures
High-Pressures Ground-State Structures Ice
2011/6/10
Ab initio random structure searching based on density functional theory is used to determine the ground-state structures of ice at high pressures. Including estimates of lattice zero-point energies,ic...
Crop yields response to water pressures in the Ebro basin in Spain: risk and water policy implications
Crop yields response water pressures risk
2011/2/9
The increasing pressure on water systems in the Mediterranean enhances existing water conflicts and threatens water supply for agriculture. In this context, one of the main priorities for agricultural...
Solid state and sub-cooled liquid vapour pressures of cyclic aliphatic dicarboxylic acids
Solid state sub-cooled liquid vapour cyclic aliphatic
2011/1/21
Knudsen Effusion Mass Spectrometry (KEMS) has been used to measure for the first time the solid state vapour pressures of a series of aliphatic cyclic dicarboxylic acids with increasing ring size. Add...
The vapor pressures and activities of dicarboxylic acids reconsidered: the impact of the physical state of the aerosol
dicarboxylic acids the physical state of the aerosol
2010/12/10
We present vapor pressure data of the C2 to C5 dicarboxylic acids deduced from measured evaporation rates of single levitated particles as both, aqueous droplets and solid crystals. The data of aqueou...
Polymer tensiometers with ceramic cones: direct observations of matric pressures in drying soils
Polymer tensiometers ceramic cones drying soils
2010/10/30
Measuring soil water potentials is crucial to characterize vadose zone processes. Conventional tensiometers only measure until approximately −0.09 MPa, and indirect methods may suffer from the n...
Triatomic and chained molecular phases of metallic hydrogen at ultra-high pressures
Triatomic chained molecular phases metallic hydrogen ultra-high pressures
2010/10/16
It is long believed that steadily compressed hydrogen beyond 400 GPa might undergo a transition from a proton-paired insulator to a monatomic metal, associating with dissociation of the molecules. A ...
Solid state and sub-cooled liquid vapour pressures of substituted dicarboxylic acids using Knudsen Effusion Mass Spectrometry (KEMS) and Differential Scanning Calorimetry
Solid state sub-cooled liquid vapour pressures dicarboxylic acids Knudsen Effusion Mass Spectrometry Differential Scanning Calorimetry
2010/5/26
Solid state vapour pressures of a selection of atmospherically important substituted dicarboxylic acids have been measured using Knudsen Effusion Mass Spectrometry (KEMS) over a range of 20 K (298–318...
Dusty uch II regions：cloud pressures and density distributions
Dusty uch II regions cloud pressures density distributions
2009/6/8
Dusty uch II regions：cloud pressures and density distributions。
A group contribution method for estimating the vapour pressures of α-pinene oxidation products
contribution method vapour pressures α-pinene oxidation products
2009/1/7
A prediction method based on group contribution principles is proposed for estimating the vapour pressure of α-pinene oxidation products. Temperature dependent contributions are provided for the foll...
SIMPOL.1: a simple group contribution method for predicting vapor pressures and enthalpies of vaporization of multifunctional organic compounds
vapor pressures enthalpies vaporization multifunctional organic compounds
2008/11/7
The SIMPOL.1 group contribution method is developed for predicting the liquid vapor pressure poL (atm) and enthalpy of vaporization Δ Hvap (kJ mol-1) of organic compounds as functions of temperature (...
Evidence for a delayed response of riverine phosphorus exports from increasing agricultural catchment pressures in the Lough Neagh catchment
riverine phosphorus exports riverine phosphorus exports
2006/4/30
Total phosphorus (TP) exports from the rivers draining into Lough Neagh increased between 1974 and 2000
despite lower TP inputs to the rivers from point sources. Over this period annual diffuse expor...
57Fe nuclear forward scattering of synchrotron radiation in hedenbergite CaFeSi2O6 at hydrostatic pressures up to 68 GPa
nuclear forward scattering CaFeSi2O6 hydrostatic pressures 68 GPa
1999/3/21
The Fenuclearforwardscattering(NFS)ofsynchrotronradiationandtheuseofdia-
mondanvilswithheliumaspressuremediumallowedstudyoftheelectronicstateofFe
inthechainsilicatehedenbergiteCaFeSi O atpressuresup...