Titlebook: Instrumental Analysis in the Biological Sciences; M. H. Gordon,R. Macrae Book 1987 Springer Science+Business Media New York 1987 Instrumen

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HERTZ

LUCY

Electrophoresis,nts may be molecular, for example, proteins, or cells or even charged particles, but here we shall restrict our discussion to charged molecules (ions). Similarly, the fluid medium may be liquid or gaseous, but in biological systems it is only electrophoresis in the former that is of interest. It sho

homeostasis

Microaneurysm

Fluorescence and phosphorescence spectrophotometry,r in the nature of the ground and excited states. A molecule may be excited from a singlet ground state to a singlet excited state by the absorption of radiation in the UV or visible region of the spectrum. Electronic excitation is accompanied by excitation to a higher vibrational energy level. The

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Infrared spectroscopy,rd spectrometers scan the mid-IR region between 4000 and 400 cm. (2·5–25 .m). The near-IR extends from 12 500–4000 cm . (0·8–2·5 .m), and the region from 400–50 cm . (25–200 .m) is known as the far-IR. IR radiation causes transitions between vibrational energy levels and also between rotational ener

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enterprise

Electron spin resonance,cies containing unpaired electrons. Thus it is restricted to free radicals, paramagnetic metal ions and molecules in a triplet electronic state. The technique involves the absorption of microwave radiation, which induces transitions between electronic magnetic energy levels.

圓木可阻礙

Flame techniques,c species from inorganic analytes in solution. The simplest of these is flame photometry, now more commonly termed flame emission spectrometry (FES), which is based on the measurement of the light emitted when atoms raised to an excited state by the thermal energy of the flame return to the ground s