… , a microphone which converts sound waves into a modulated current. (2) The receiver (headphone or earphone), … which reconverts the modulated current into sound waves. In most cases, the transmitter and receiver are incorporated in a single moulding known as a hand-set. In other cases the transmitter …
… chemical constitution, e.g. : (a) Enzymes in which the molecule consists solely of a protein (e.g., pepsin, … of a protein combined with a non-protein compound of low molecular weight, acting as a cofactor. The cofactor may be … or of culture-broths (the latter derived from bacteria, moulds, etc.). These products, which may contain several …
… (HCFCs) : 3827.61 - - Containing 15 % or more by mass of 1,1,1-trifluoroethane (HFC-143a) 3827.62 - - … not included in the subheading above, containing 55 % or more by mass of pentafluoroethane (HFC- 125) but not … of methane, ethane and propane is controlled by the Montreal Protocol on Substances that Deplete the Ozone …
… Chemical elements are composed either of a single nuclide (monoisotopic elements) or of a mixture of two or more isotopes in known unvarying proportions. For example, … whose natural isotopic composition has been artificially modified by enriching the elements in some of their isotopes …
… (1) Units comprising a compressor (with or without motor) and condenser mounted on a common base, whether or not complete with … equipped with ancillary devices such as agitators, mixers, moulds. These appliances include domestic refrigerators, …
… with or without internal reservoirs, heading 84.13 (non‑automobile types) or heading 87.05 (automobile types). (B) SPRAY … the nozzle, which is usually adjustable to give a jet or more or less divergent spray. They are used for spraying … Hand controlled spray guns with self‑contained electric motor, incorporating a pump and a container for the material …
… main part is a beating rod pivoted at its lower end; the movement of the rod may be accelerated or retarded according … concert‑hall tuning forks consisting of a metal tongue mounted on a sounding box and struck with a hammer. Pitch pipes (tuning pipes) are mouth‑blown and consist of one or more reeds or pipes; these …
… B 1 (thiamine (INN), aneurine). Thiamine is found in most animal and vegetable tissues (e.g., in cereal grain … powder. Hygroscopic, not very stable. (3) Thiamine mononitrate . White crystalline powder, fairly stable. (4) …
