Ambient light

Ambient lighting Don t rely solely on color to distinguish, affects color. Color Augment color with other means of blind operators. identification. ... 

Near ambient light, including UV-A and UV-B Near ambient visible light, excluding both UV-A and UV-B (99.7% UV removed)... 

The average photosynthetic rates for each of the three experiments performed, increased with UV exclusion and decreased with increased UV exposure (Table I). However, primary production rates of phytoplankton (collected on 17 November and 3 December 1987) measured under near-ambient light conditions were low, but not statistically different from those measured under either UV-reduced or UV-enhanced conditions. Small but statistically significant increases in... 

The action of chlorine on ethylene can be dangerous in ambient light. 

When this compound is mixed with lithium nitrate or sulphur dioxide, this leads to its explosive polymerisation. This reaction was carried out in a glass reactor at 20°C. It seems that ambient light played a role. 

The polymer can also be used to tailor the selectivity and sensitivity of the optical sensor due to enrichment of the analyte by the polymer material. Furthermore, the polymer may the permeable for gases but not by ions again inducing selectivity for certain analytes. Finally, the polymer can provide optical isolation against ambient light and thus prevent bleaching and light interference. 

Probably the best optical sensors for pH are based on a pH indicator dye covalently immobilized on transparent cellulose membranes (Table 15). The pKa of the dye is 7.34 and colour changes from yellow to purple are observed upon deprotonation. The cellulose membrane exhibits still more than 50% of the initial colouration after two years of storage in distilled water at ambient light. 

The excellent detection ability for flames makes UV sensing a good method for remote fire alarm-monitoring. UV radiation after the outbreak of a fire reaches a sensor much faster than heat or smoke. Also, the distance between sensor and fire is less critical. Requirements for the sensor are high sensitivity and excellent selectivity. Radiation intensities at the sensor position may be even lower and the ambient light conditions less restricted than for combustion controlling. When used outside, solar-blindness is a must. These stringent requirements make UV fire alarm monitors expensive, and they are used in industrial environments such as production floors or warehouses rather than in private homes. 

The photoreactive groups should have sufficient stability under ambient light. 

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