Clocking transient chemical changes by ultrafast electron diffraction

Article Abstract:

Transient chemical changes during molecular dissociation could be detected by the use of ultrafast electron diffraction. These chemical and photobiochemical reactions are clocked by an initial femtosecond laser pulse and the second femtosecond pulse probed the dynamics. Photoelectron spectroscopy and mass spectroscopy are detection methods that have been used. The ability to clock changes is important in the study of the molecular structures dynamics.

Analysis, Chemical reactions, Electrons, Electron diffraction

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Science for the have-nots

Article Abstract:

Issues are presented concerning the growing gap between the prosperity of industrialized and developing countries. The detrimental effect of a lack of vision for science and technology in developing countries is discussed.

Column, Science and technology policy, Developing countries, Industrialized countries, Industrial nations

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The fog that was not

Article Abstract:

Issues are presented concerning the differences which exist in the scientific rules which apply to the quantum mechanics of macroscopic and microscopic systems. Quantum uncertainty is discussed.

Laws, regulations and rules, Quantum theory, Quantum mechanics, Nanotechnology

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