Strip lights

Then remove the strip and dry it in a stream of cold air, either from a blower, or by pinning it to the lower edge of a fume-cupboard window having a vigorous draught already in operation. Then spray the strip lightly but uniformly with the ninhydrin solution (D) in a fume-cupboard, and dry as before. 

Inspect the paper in ultraviolet light—conveniently in front on a Hanovia ultraviolet strip light—in a dark room. The acids show up as intense blue fluorescent spots. Mark with a pencil the positions of all spots. The position of the two spots arising from solution (C) should be compared with the single spots arising from solutions (A) and (B). It is probable that the solution (B) of pure N-methylan-thranilic acid may also reveal a faint spot corresponding to anthranilic acid still present in minute traces in the methylated acid cf. p. 223). 

Figure 8-41. Open steam stripping light hydrocarbons from a rich oil. Modified for Example 8-20 and used by pemnission, Ellerbee, R. W., C/iem. Eng. Mar. 4 (1974), p. 108.

Strip lighting in a classroom, hospital, business hall or kitchen is often called fluorescent lighting, although in fact it is a phosphorescent process, as above. Each bulb consists of a thin, hollow glass tube that is sealed at both ends. It contains gas such as helium, argon or krypton, and a drop of liquid mercury (about 0.5 mg of mercury per kilogram of lamp, or 0.5 parts per million). Like the neon and sodium lamps above, the pressure inside the tube is about 30 Pa, so the mercury evaporates to become a vapour. It is the mercury that yields the light, albeit indirectly. 

Louis A. Bloomfield s entertaining book How Things Work The Physics of Everyday Life (second edition), Wiley, New York, 2001, discusses neon bulbs and fluorescent strip lighting, see pp. 395-399. For a more scientific look at fluorescent dyes, try Chapter 3 of Peter Bamfield s Chromic Phenomena (above), especially pp. 182-184. 

Why is strip lighting more likely to cause degradation than normal light bulbs ... 

The spectral distribution of light emitted from a fluorescent strip light contains more UV component than does a normal tungsten bulb, and thus it will emit more photons of a sufficiently high energy to effect the degradation reaction shown in equation (9.6). 

Miscellaneous. The addition of water to scintillants often lowers the efficiency of counting, so it should always be added in constant amounts. Sometimes the addition of base causes artifacts. Strip lighting can cause some scintillants to phosphoresce, and the effect can last several minutes. 

Photopolymerisation in riboflavin-containing solution is induced by placing a fluorescent strip light a few centimetres from the tubes, and is accompanied by bleaching of the yellow riboflavin colour. 

Foaming is sometime experienced in moderate-pressure (100 to 200 psi) strippers that strip light from heavy hydrocarbons (209). The presence of small quantities of water may promote this foaming. 

The ceilings are perforated metal pans with insulation placed in the pans. These are effective both as sound deadeners and heat insulators. Lighting is by means of fluorescent strip lights set flush with the ceiling. 

The reflux ratio is 3.71. At Stage 6, some liquid is withdrawn and fed to a 4-stage stripper. Open steam (3300 Ib/h) is used to strip light material from the liquid leaving the main column. A kerosene product is produced from the bottom of the stripper. It has ASTM 5% and 95% boiling points of 396 and 502 F, respectively. 

In this chapter, all of the process flow rates were considered to be constrained by zero flow and the maximum flow allowable by the valve size and span of the flow measurement. The main column constraint because of flooding is associated with the vapor traffic and pressure drop across the trays or packing in the distillation column. The mass transfer rate limit for stripping light key impurity from the bottoms stream was presented. The mass transfer rate limit for absorbing heavy key impurity from the overhead vapor stream was also presented. 

Continuing the pressure survey, next I measured the pressure drop across the bottom three trays used to steam strip light gas oil from resid. I found that the AP was 0.81 psi. The tray spacing was 18 in. and the resid had a 0.79 sp gr. Therefore ... 

By their nature lighting units emit heat the amount of heat will generally depend upon two factors, the wattage or energy consumption and the type of light, such as halogen lamps, incandescent units or fluorescent strip lighting. 

Lighting should be bright with spotlights over the stoyes, sink and worktops. Dimmer switches are required. Fluorescent strip lighting should be used as the general lighting. 

BASF AG Lucryl PMMA Applications Strip light diffusers, high quality writing instruments, jewellery boxes, extrusions and profiles, display stands, scales, containers. ... 

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