Wood s glass

Techniques for measuring the intensity of fluorescence have been reviewed in detail elsewhere (33). Usually one uses a medium pressure mercury lamp as the light source with a Wood s glass filter which isolates mainly the intense 365 m/j. line. The fluorescence can be detected with a multiplier phototube in front of which is an appropriate filter determined... 

Compression and injection molding are used with amino resins to produce articles such as radio cabinets, buttons, and cover plates. Because melamine resins have lower water absorption and better chemical and heat resistance than urea resins, they are used to produce dinnerware and laminates used to cover furniture. Almost ah molded objects use fillers such as cellulose, asbestos, glass, wood flour, glass fiber and paper. The 1997 U.S. production of amino resins was 2.6 billion pounds. 

The near UV spectral range is divided in three bands the short wave band or UV-C emission runs from 180 to 280 nm with a peak at 254 nm. The medium wave band or UV-B runs from 280 to 320 nm with a peak at 312 nm, while the UV-A long wave band runs from 320 to 380 nm with a peak at 365 nm. The long wave emission is commonly called "Black light" or "Wood s light". Only the UV-A portion of the lamp spectrum is useful for UV reflectivity measurements, since wavelengths under 400 nm are cut off by the glass optics of the objective. However, the full power of the lamp is used for UV fluorescence measurements. 

In 1905, British inventor John C. Wood was working with cellulose and developed a method to adhere glass panes using celluloid as the adhesive. Wood s version of shatter-resistant glass was produced under the band name Triplex since it consisted of outer layers of glass with an inner layer of celluloid polymer. 

The reinforcements amenable to RTM are similar to those used for pultrusion, except that they need not be continuous in nature. Thus, E-glass, S-glass, aramid, and carbon fibers are commonly used, as are discontinuous filaments such as wood fiber and polyesters. Even metal and ceramic fibers can be used in this technique. In one method, the preform is fabricated by spraying 12- to 75-mm-long chopped fiber rovings onto a preshaped screen. A binder sprayed with the fibers keeps them in place and holds the preform shape, which is then placed in the mold. 

For dehydration, place the platinum (nickel) crucible with the prepared salt ( 5 g) into a test tube with a standard ground-glass joint (Fig. 63). Preliminarily weigh the crucible and the salt with an accuracy up to 0.01 g. Connect the test tube to a vacuum system. Evacuate it (10- mmHg) first at room temperature during 10-20 min, and then at 150 °C on an oil bath or a bath with Wood s alloy. Dehydrate the substance up to a constant mass. Calculate the composition of the product according to the change in its mass. 

Wood s metal 25 12.5 50 12.5 Melts in hot watei at I54CF Wets glass. 

The lane beneath the churchyard was empty as ever, and my feet were silent on the damp ground. The front door of the church cottage stood open, and halfway down the passage Shales s study door was ajar. I propped the staff against the wall and waited to catch my breath. Then I heard the chink of wood on glass. 

A nitrogen inlet is constructed using a fine capillary held through a screw-top Quickfit thermometer adapter, placed on top of the glass tube. The system is adjusted such that the capillary reaches the bottom of the glass tube. The side-arm is connected to a gas bubbler. The glass tube is then placed in a Wood s metal bath, which is heated by means of a Bunsen burner (care ). 

A flow of nitrogen gas is allowed to pass through the reaction mixture and is heated by means of the Wood s metal bath. When the mixture becomes molten, the temperature is maintained. The pressure inside the glass tube is reduced, first using the water aspirator to remove most of the acetic acid produced in the reaction, and then using a standard rotary pump for about 3 h. ... 

When the reaction is judged to be complete, the reaction mixture is cooled and removed from the Wood s metal bath. The polymer is collected by breaking the glass tube. 

Wood s tubes have been used as a source of hydrogen atoms in atomic beam experiments [71]. A small slit in the middle of the long, glass section allows the atoms to diffuse into the beam chamber. A concentration of hydrogen atoms of 0 7 to 0-9 was reported. In recent microwave work [143], the use of a mixture of dimethyldichlorosilane and methyltrichlorosilane proved very effective as a wall-poisoner. 

The U.S. Department of Agriculture (USDA) quality standards for soybean oil state that soybean oil shall be clear and brilliant when held at 70-85°F and shall be free from sediment, such as metal, wood, dirt, glass, paint, insects, insect parts, or any other foreign material (Anonymous, 2005). In addition, the oil shall have a bland odor and flavor and shall be free of beany, rancid, painty, musty, metallic, fishy, putrid, or any orher undesirable odor and/or flavor and have a light viscosity and no heavy oily mouthfeel. Table 15.4 lists the analytical requirements for a RBD and... 

Hot Bath Method One The iowest temperature of a bath of molten Wood s metal that results in ignition within 5 minutes for a 0.1 g sample in a small glass test tube. 

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