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Physical and Chemical Principles
2011The land surface affects the atmosphere via the exchange of heat, matter (moisture, gases, aerosols), and momentum. The exchange of heat and moisture, for instance, are described by the energy and water budgets that are coupled via the water-vapor flux due to evapotranspiration (i.e., the sum of transpiration and evaporation). Coupled energy- and water-
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Chemical and physical “hardness”
Materials Research Innovations, 1997A common theme links chemical, mechanical, and optical hardnesses. It is the gap in the bonding energy spectra of materials. This gap determines molecular stability, and therefore ”chemical hardness”. Chemists call it the LUMO-HOMO gap between anti-bonding and bonding molecular orbitals.
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Physical and Chemical Properties
2019High-entropy alloys (HEAs) not only have excellent mechanical properties, but also have good physical and chemical properties. Usually, the resistivity of HEAs is higher than that of metals and alloys, but only lower than that of bulk amorphous alloys, and for some HEA, such as Ta34Nb33Hf8Zr14Ti11, have superconducting behavior. The critical transition
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Physical-Chemical Properties [PDF]
, 1987 Among the nucleic acids, the single-stranded RNA molecules have the highest potential to form a large variety of structures and to undergo quite different structural transitions. The determination of their structure and structural transitions is a prerequisite for understanding their function in replication, transcription, translation, and regulation ...
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1984
The purpose of this paper is to review the methods having been used for description of the safety and efficacy of a radiopharmaceutical (RPh). Since the group named “radiopharmaceuticals” is quite inhomogeneous in the chemical and physical properties of its individuals it is useful to explain why and when the particular methods are being used, i.e.
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The purpose of this paper is to review the methods having been used for description of the safety and efficacy of a radiopharmaceutical (RPh). Since the group named “radiopharmaceuticals” is quite inhomogeneous in the chemical and physical properties of its individuals it is useful to explain why and when the particular methods are being used, i.e.
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Chemical and Physical Properties
2003It is critical to understand the chemical and physical properties of MTBE and other gasoline constituents because they determine how the chemicals behave in the subsurface environment. These properties also determine which physical and chemical technologies are suitable for remediation.
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1995
At high supersonic flight speed, gas heating within the bow wave gives rise to such physical and chemical processes as excitation of the internal energy of the molecules, dissociation, chemical reactions, ionization, and radiation. Intensive aerodynamic heating of the vehicle often results in destruction of the heat protection material.
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At high supersonic flight speed, gas heating within the bow wave gives rise to such physical and chemical processes as excitation of the internal energy of the molecules, dissociation, chemical reactions, ionization, and radiation. Intensive aerodynamic heating of the vehicle often results in destruction of the heat protection material.
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