Typewriter

A year later, a novel method of encoding chemical structures via typewriter input (punched paper tape) was described by Feldmann [42]. The constructed typewriter had a special character set and recorded on the paper tape the character struck and the position (coordinates) of the character on the page. These input data made it possible to produce tabular representations of the structure. 

The metal is employed to form numerous alloys with other metals. Brass, nickel silver, typewriter metal, commercial bronze, spring bronze, German silver, soft solder, and aluminum solder are some of the more important alloys. 

Nontreated surfaces can be hot-ptinted with special foils ia a manner similar to a typewriter ribbon. The type is heated to about 321°C, and a printing pressure of 172—206 kPa (25—30 psi) is appHed for about 0.25 s no further treatment is required. 

Because of its hardness and ability to be electroplated, together with good dimensional stability, phenolic mouldings are used in the manufacture of golf ball heads for typewriters. 

Preform mouldings are particularly useful in carrying containers and protective covers. Examples of their use include television receiver backs, moulded suitcases and typewriter cases. Although the finish obtained during moulding is frequently adequate in industrial applications some improvement is necessary where a good appearance is desired. Methods used include painting or... 

Business machinery applications include keys for keyboards, typewriter ribbon guides, plug and socket connectors and optical cable sheathing. 

F Molding processes, all thermoplastic processes Chemical apparatus, typewriter cases, bags, luggage shells, auto trim... 

FIG. 33 (a) Evolution of a system of 128 chains quenched at times t — 0 from a state with e = —4.0 (upper left corner) to e — —0.4. Snapshots are shown in time increments At — 65536 MCS (in typewriter fashion from left to right), (b) Evolution of the same system but for time increments At — 524288 MCS [23]. 

Farb-abanderung, /. change in color. ab-streichrakel, m. /. color doctor, -abstu fung, /. color gradation. anstrich, m. coat of color, coat of paint, -bad, n. dye bath, band, n. typewriter ribbon. 

We all have an intuitive feel for complexity. An oil painting by Picasso is obviously more complex than the random finger-paint doodles of a three-year-old. The works of Shakespeare are more complex than the rambling prose banged out on a typewriter by the proverbial band of monkeys. Our intuition tells us that complexity is usually greatest in systems whose components are arranged in some intricate difficult-to-understand pattern or, in the case of a dynamical system, when the outcome of some process is difficult to predict from its initial state. 

A typical laboratory that has been in operation for some time usually has run out of space for optimum operation. In some cases, the space may be there but cannot be utilized to full advantage. Work benches gradually get covered with permanent equipment set-ups, leaving little room for other work. Lack of storage space for supplies and samples becomes the rule rather than the exception. Adequate room for a desk, bookcase, or typewriter has often been overlooked. As more personnel is added, these problems become critical. Overcrowding also has a serious effect on safety. 

There is more to a laboratory than work benches and the instruments mounted on them. Free-standing equipment must also be considered. This includes refrigerators, safety storage cabinets for chemicals, safety shower, desk space, typewriter stand or computer terminal, or any other equipment that is not bench-mounted. File cabinets, which are real space-robbers, must not be forgotten. In one laboratory, much space was saved by placing two-drawer file cabinets beneath the large table used for sorting samples. 

In one laboratory, an atomic absorbtion instrument was placed on top of a three-foot knee-hole. Drainage from the instrument s atomizer went into a bottle underneath. Data from this instrument was recorded on a strip chart recorder placed on a typewriter stand. When in use, the recorder was at the operator s right, where it was easy to observe and adjust. WTien not in use, it was kept out of the way in the knee-hole, along with the operator s stool. 

A typical laboratory will produce many types of reports. If a computer is available, these will come forth almost automatically. If not, they will have to be typed. In a typical case, an analysis report, for instance, will be written up by hand, taken to the ofBce for typing, and returned for checking and signature. Typing a report in the laboratory will save time and effort but, unfortunately, many professionals consider it beneath their dignity to operate a typewriter, though not a computer, which uses essentially the same techniques. Longer reports will usually be typed by a secretary, often from hand written notes. 

For many piuposes, high speed dot-matrix print-out is satisfactory. In other cases, such a presentation may not be proper. Letter-quality printers are now available for computers at affordable prices. In addition, many newer typewriters may be hooked up to computers for high quality print-outs. These may be slower than the computer printers, but the cost of such a typewriter is... 

Since the company was getting new typewriters foi- the office, an older model electric machine was to be discarded. It was just right for the laboratory, but the laboratory operator insisted on having it serviced before taking it over. 

The spread of technology at pharmaceutical companies also meant that secretaries were given word processors (such as the Wang machines) to use in addition to typewriters, which were still needed for filling out forms. Keyboarding was the domain of the secretaries, the data entry technicians, and the computational chemists. Only a few managers and scientists would type their own memos and articles. 

Trichloroethylene is also known as Triclene and Vitran and by other trade names in industry. It is a nonflammable, colorless liquid at room temperature with a somewhat sweet odor and a sweet, burning taste. Trichloroethylene is now mainly used as a solvent to remove grease from metal parts. It is also used as a solvent in other ways and is used to make other chemicals. Trichloroethylene can also be found in some household products, including typewriter correction fluid, paint removers, adhesives, and spot removers. Most people can begin to smell trichloroethylene in air when there are around 100 parts of trichloroethylene per million parts of air (ppm). Further information on the physical and chemical properties of trichloroethylene can be found in Chapter 3, and further information on its production and use can be found in Chapter 4. 

Various consumer products found to contain trichloroethylene include typewriter correction fluids, paint removers/strippers, adhesives, spot removers, and rug-cleaning fluids (Frankenberry et al. 1987 LARC 1979). 

Various consumer products have been found to contain trichloroethylene. These include wood stains, varnishes, and finishes lubricants adhesives typewriter correction fluids paint removers and cleaners (Frankenberry et al. 1987). Trichloroethylene use as an inhalation anesthetic, fumigant, and extractant for decaffeinating coffee has been discontinued in the United States (EPA 1985c). 

Troutman WG. 1988. Additional deaths associated with the intentional inhalation of typewriter correction fluid. Vet Hum Toxicol 30 130-132. 

Typewriter correction fluid was first invented by Bette Nesmith Graham J1 21 Her early version for the product consisted of a white tempura paint to correct mistakes. Looking for a mixture that was both quick-drying and barely detectable, she discovered a formulation that she would later sell to the Gillette Company in 1979. The formula was modified slightly in the 1980s. What is the chemistry of Liquid Paper ... 

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