Cold Light Sources

Ingle, 1979 Marino et ai, 1979) and of metabolites and hosts of other substrates (Mendenhall, 1977 Williams and Seite, 1976). Still other interest in chemiluminescent reactions has been directed toward the development of a commercial, portable, cold light source (Rauhut, 1969). 

Cold light sources are used when strong illumination is needed, but drastic heat input into the object must be avoided, e.g., during microscopic observations. Usually a halogen lamp is installed with a concave mirror at the back and a system of lenses in the front. Unwanted IR and UV... 

In the laboratories of the authors, simultaneous PIT/PIV measurements with TLCs are performed and a flow in a mini chaimel is investigated (Fig. 10). The illumination is done by two 250 W halogen cold light sources, and the images are acquired by a high-speed color CMOS camera with a long-distance microscope. With this measurement setup, measurements with a frequency... 

Effectiveness Very high, cold light source (no infra-red, no UV)... 

Photochemistry A solution of the pigments in acetone (5-10/LtM) was irradiated with white light (150 W cold light source, 2 cm distance, ambient temperature). The reaction was followed spectrophotometrically. After conversion to the intermediate (A 686 nm), the solution was kept in the dark for 24 hrs and then worked up. Products were isolated by chromatography on silica gel. 

Fiberoptic cold light source (e.g., Schott, Meinz, Germany KL1500 LCD). 

Dissecting microscope with magnification to 50x (minimum), preferably greater and transmitted, and incident illumination, preferably from a cold light source. Whatman 3 MM filter paper (MiUipore, Southampton, UK). 

Fiber-optic light sources—used in devices such as endoscopes, retractors, and headlamps—-are often referred to as cold light sources. This can be misleading. There are two main sources of burns from fiber-optic lights ... 

Cold light source e.g., KL1500 (Carl Zeiss). 

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