tailieunhanh - Ebook Encyclopedic dictionary of polymers: Part 2

The book incorporates named processes in current commercial use anywhere in the world, those piloted on a substantial scale, as well as important obsolete processes. This encyclopedic dictionary reflects recent trends in the global chemical industry away from petrochemicals and toward pollution prevention and waste disposal. | Macromolecule M m \|em\ n. (1) Abbreviation for meter. (2) Abbreviation for the SI prefix milli‐. (3) (usually italicized) Abbreviation for chemical positional prefix meta‐. M n. (1) Abbreviation for prefix mega‐. (2) Symbol for molecular weight. (3) Symbol for being moment. mA n. Abbreviation for milliampere. MAC n. Maximum allowable concentrations of solvent vapors, also known as threshold limit values. These values refer to air‐borne concentrations of substances and represent conditions to which it is believed that nearly all workers may be repeatedly exposed, day after day, without adverse effect. See maximum allowable concentration. MacAdam color difference equation n. A color difference equation developed by David MacAdam, which is now used as modified by Hugh Davidson and Fred Simon to incorporate the effect of lightness on the chromaticity differences: Â DE ¼ 1=K ðg11 Dx 2 þ 2g12 Dx Dy Ã1=7 ; þg22 Dy 2 þ G DY 2 where g11, 2G11, and g22 are the constants depending on the chromaticity coordinates, x and y, and K and G are the constants depending on the luminous reflectance or transmittance, Y. This color difference is frequently calculated from charts prepared by Simon and Goodwin, which have the required constants built‐in. MacAdam limits n. The theoretical limit or gamut of colors, which can be obtained at various limits of luminance (Y ). Thus, the gamut of colors, which can be obtained theoretically, decreases steadily as the luminance (Y ) increases. Machinability \me‐|she‐ne‐|bi‐le‐te\ (ca. 1864) ¯ ¯ vt. (1) In fabricating materials by such operations as drilling, lathe‐turning, and milling, the ease with which the material is removed. Machine‐printing n. The method by which the bulk of modern wallpapers are produced. Machine‐printing employs a rotary press and a series of cylinders or rollers to turn out wallpaper at high speeds. Raw paper stock is first given a coating of the ground color by a special machine, after which the paper proceeds in a .

TỪ KHÓA LIÊN QUAN
crossorigin="anonymous">
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.