White, fluorescent

Fig. 11. Energy distributions of CIE standard illuminant A, a tungsten incandescent lamp a cool white fluorescent lamp E and CIE standard illuminant...

Color-order systems, such as the many MunseU collections available from Macbeth, have been described previously. Essential for visual color matching is a color-matching booth. A typical one, such as the Macbeth Spectrahte, may have available a filtered 7500 K incandescent source equivalent to north-sky daylight, 2300 K incandescent illumination as horizon sunlight, a cool-white fluorescent lamp at 4150 K, and an ultraviolet lamp. By using the various illuminants, singly or in combination, the effects of metamerism and fluorescence can readily be demonstrated and measured. Every user should be checked for color vision deficiencies. 

Cultures of G. polyedra (L. polyedrum) are grown at 20 5°C in a supplemented sea water medium (Hastings and Sweeney, 1957 Hastings and Dunlap, 1986), under cool-white fluorescent lighting of a 12-hr light/12-hr dark cycle. The cultures are inoculated at densities of 100 to 500 cells/ml. After 2-4 weeks, cells are harvested by vacuum filtration on a filter paper at cell densities of 7,000-15,000 cells/ml, yielding 0.3-0.7 g wet cells per liter of culture. 

Glucose, fructose Infrared lamp or 170 °C each for 3 min Heating produced stable bluish-white fluorescence (Xexc = 365 nm and Xn > 400 nm, cut off filter K 400), detection limits 5-10 ng. [33]... 

Material required Surface soil samples (0-10 cm), plastic dishes (500 ml), etiolated seedlings of test plants, pots and white fluorescent lamp. 

The cultures grew at 18-20°C under a constant illumination (150 pmol photons m 2-s 1) provided by cool-white fluorescence lamps. For the anaerobic induction, cells were harvested by centrifugation (5 min, 3000xg) in the exponential growth phase at an approximate culture concentration of2><106 cells ml 1 and afterwards resuspended in fresh TAP medium. 

Nutritional and cultural techniques for growing Ochromonas danica in light and darkness have been described (A2, H18). It was grown under constant illumination from five 40-watt warm-white fluorescent lights, ca. 1.0 m from the cultures. Transfers were made weekly in 10 ml of maintenance medium 1ml was used for transfer (Table 6). 

White Fluorescent Organic Light-Emitting Diodes. 365... 

Culture of Dinoflagellate. The isolate of toxicus (SIU 350) used in this study was obtained from the South Sound of Virgin Gorda, British Virgin Islands. The species was brought into unialgal culture and maintained in enriched sea water ( ) under continuous light (3200 lux cool white fluorescent) at 27.0° C. 

The development of large-scale cultures involved transferring cells from stock cultures to a series of two liter Fernbach flasks containing enriched seawater medium. After the early stationary phase of growth had been reached (approximately 15-20 days) each of these cultures were used to innoculate 18 liters of the same medium in 20 liter carboys. Large-scale cultures were grown under continuous light (4300 lux cool white fluorescent) at 27.0° C. 

Growth of Seedlings. Cucumber (Cucumis sativus L., cv. Wisconsin SMR-IS) and soybean (Glycine max L. Merr., cv. Wayne) were grown in vermiculite and watered daily in a controlled environment chamber (26 2 C day, 21 2 C night) on a 12 hr photoperiod (eight 30-W cool-white fluorescent tubes plus four 25-W incandescent bulbs 200+foot-candles). The balanced nutrient solution of Frick and Mohr (H9), modified to include 1 g/1 Ca(N03)2 but without sucrose, succinic acid and kinetin, was applied on alternate days. 

Natural teeth exhibit blue-white fluorescence in the long-wavelength UV [5.435]-[5.437]. Luminescent pigments are used to imitate this phenomena in artificial teeth. They are added to the ceramic paste at a concentration of 0.3-0.5 wt%. Yttrium silicates doped with cerium, terbium, and manganese give the best results [5.438]. The excitation maximum of these phosphors is in the range 325-370 nm. The fluorescence color of the teeth can be varied by changing the concentration of activators. 

CA 45, 2670.(1951) (Completeness of coating of HE s grains with wax can be detd by examining them under UV radiation. The uncoated particles are purple colored whereas the coated material has a yel-white or a blue-white fluorescence) 9)A.LeRoux, MP 33,... 

The dwarf mutant corn (d-1) plants were germinated in soil-vermiculite, transferred when they were nearly ready for bioassay treatment (14), and grown in a growth chamber at about 25° to 30° C. with continuous white fluorescent light of about 450 foot-candles. The roots of the com were supported on filter paper wetted with Hoagland s solution and affixed to slanting glass plates, sup-... 

In the case of photostability testing the pharmaceutical ingredient may be subjected to xenon, metal halide, near UV, or cool white fluorescent lamp exposure. 

Macbeth 5000 K fluorescent, a Philips Ultralume fluorescent, and a Sylvania Cool White fluorescent tube. Some color constancy algorithms try to find out what type of illuminant produced the particular color sensation, which was measured by the sensor. If we measure the entire power spectrum for a particular patch of our object and also know the type of illuminant used, then it is easy to compute the BRDF. Let L(X) be the measured power spectrum and let E A.) be the power spectrum of the illuminant. Assuming a Lambertian surface, where the BRDF is independent of the normal vector of the patch Nobj, and also independent of the normal vector that points to the direction of the light source Ni, we... 

Figure 3.18 Power spectrum of four different illuminants a Sylvania 75 W halogen bulb, a Macbeth 5000 K fluorescent, a Philips Ultralume fluorescent, and a Sylvania Cool White fluorescent tube. The power spectra were measured by Funt et al. (1998) with a Photoresearch PR-650 spectrometer.

Figure 2 HPLC-related substance chromatograms (UV detection) of 297802 tartrate aqueous solution exposed to cool-white fluorescent light ( 17,000 lux) for 3 and 7 days.

In option 2, the same sample should be exposed to both the cool white fluorescent and the near ultraviolet lamp. 

---