Results 301 to 310 of about 5,388,942 (324)
Chemical analysis, antibacterial and anti-inflammatory effect of Achillea fragrantissima essential oil growing wild in Egypt. [PDF]
BMC Complement Med TherTawfik NF +4 more
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2003
Publisher Summary This chapter discusses the absorption and reflection techniques. Measurement of the absorption of infrared radiation enables the quantity of many gases in a complex gas mixture to be measured in an industrial environment. Sometimes this is done without restricting the infrared frequencies used (dispersive).
C.K. Laird, I. Verhappen
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Publisher Summary This chapter discusses the absorption and reflection techniques. Measurement of the absorption of infrared radiation enables the quantity of many gases in a complex gas mixture to be measured in an industrial environment. Sometimes this is done without restricting the infrared frequencies used (dispersive).
C.K. Laird, I. Verhappen
+10 more sources
Nanofluidics in chemical analysis
Chem. Soc. Rev., 2010Nanofluidic architectures and devices have already had a major impact on forefront problems in chemical analysis, especially those involving mass-limited samples. This critical review begins with a discussion of the fundamental flow physics that distinguishes nanoscale structures from their larger microscale analogs, especially the concentration ...
Jonathan V. Sweedler +3 more
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Pervaporation in chemical analysis
Journal of Chromatography A, 2010Unlike thermal processes such as distillation, pervaporation relies on the relative rates of solute permeation through a membrane and is a combination of evaporation and gas diffusion. The analytical pervaporation systems consist of a membrane module suitable for liquid sample introduction and a vacuum (or a sweeping gas) on the permeate side.
Ornthida Sae-Khow, Somenath Mitra
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Science, 1984
Selected applications of laser methods to analytical problems are reviewed. Examples are chosen from multiphoton ionization and laser fluorescence analysis. Although efforts to carry out elemental analysis with laser techniques are probably the most advanced, studies suggest that the analysis of molecular species is also quite promising, particularly ...
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Selected applications of laser methods to analytical problems are reviewed. Examples are chosen from multiphoton ionization and laser fluorescence analysis. Although efforts to carry out elemental analysis with laser techniques are probably the most advanced, studies suggest that the analysis of molecular species is also quite promising, particularly ...
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Protocols for traceability in chemical analysis
Accreditation and Quality Assurance, 1997The authors propose definitions and terminology for protocols on traceability links, generally to the international system of units, for specific chemical-analytical measurements in accordance with recognized principles of science. These definitions and terms could be useful in science, technology, commerce or law.
Stanley D. Rasberry +4 more
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1975
All methods of elemental identification depend on a determination of either the mass or the charge of the atomic nucleus. The nuclear charge can be inferred from the energy required to create a vacancy in an inner electron shell or from the energies of the electronic transitions involved in the decay of the vacancy.
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All methods of elemental identification depend on a determination of either the mass or the charge of the atomic nucleus. The nuclear charge can be inferred from the energy required to create a vacancy in an inner electron shell or from the energies of the electronic transitions involved in the decay of the vacancy.
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Microorganisms in Inorganic Chemical Analysis
ChemInform, 2005AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
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Sampling for chemical analysis
Analytical Chemistry, 1981John K. Taylor +2 more
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