Results 261 to 270 of about 208,420 (311)

Physical and Chemical Weathering

2015
As one geologist exclaimed: “Savor the irony should the metamorphic muscles that push mountains to the sky be driven by the pitter patter of tiny raindrops.” In the following chapters we look at this pitter patter, a synonym for exogenic processes that shape our landforms, starting with the most important process: weathering.
Anja Scheffers, Simon Matthias May, Dieter Kelletat   +2 more
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Chemical and Physical Bonding

1995
Electron Pair Orbitals. A practical understanding of ceramic processing requires some knowledge of chemical bonding. Weak bonds, strong bonds, and some bond types not ordinarily emphasized in first year chemistry courses are all involved in a typical ceramic process, even for an old method such as the slip casting of ball clay.
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Physical and Chemical Sensors

2011
In this chapter we give an introduction and classification on some examples of physical sensors (devices placed at the input of an instrumentation system that quantitatively measures a physical parameter, for example pressure, displacement or temperature) and chemical sensors (devices which are part of an instrumentation system that determines ...
Giuseppe Ferri, Andrea De Marcellis
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Physical and chemical effects

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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Chemical and Physical Properties

2003
It 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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Chemical and physical “hardness”

Materials Research Innovations, 1997
A 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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Some Physical and Chemical Properties of the Ampholine Chemicals

1970
Publisher Summary This chapter examines physical and chemical properties of the ampholine chemicals. The Ampholine carrier ampholytes that have been specially synthesized for electrofocusing are a mixture of a large number of aliphatic polyamino-polycarboxylic acids with different isoelectric points in the pH range 3–10.
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Physical and Chemical Principles

2011
The 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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The future of chemical physics

Chemical Physics, 2010
In this inaugural commentary, we offer a personal perspective which delineates past successes and future challenges of 21st century chemical physics.
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Physical and Chemical Properties

2019
High-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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