… consists of an aqueous solution of organic and mineral substances (proteins, fatty acids and their derivatives, salts, sugars and glycosides) containing in suspension 30 % to 40 % of rubber (i.e., polyisoprene of …
… includes : (I) Natural hormones, which are active substances produced in the living tissues of man or animals, … hormones, prostaglandins, thromboxanes and leukotrienes , such as salts, halogenated derivatives, cyclic acetals, …
… Lithopone and other pigments and preparations based on zinc sulphide 3206.49 - - Other 3206.50 - Inorganic products of a … lead carbonate; oxides of iron, lead, chromium or zinc; sulphides of zinc or mercury; lead chromate ( Chapter 28 )); … titanium dioxide. These include titanium dioxide which is surface-treated or mixed with calcium or barium sulphate or …
… and apparatus for the manufacture of boules or wafers such as : (1) One-melt furnaces for zone melting and … of silicon rods, oxidation furnaces for oxidizing the surface of wafers and diffusion furnaces for doping the … device. They may include oxides and nitrides of the substrate surface, metals, and epitaxial layers. The …
… ACTIVATED NATURAL MINERAL PRODUCTS Carbon and mineral substances are said to be activated when their superficial structure has been modified by appropriate … (with heat, chemicals, etc.) in order to make them suitable for certain purposes, such as decolourising, gas or …
… ), or for analysing materials, or measuring properties such as porosity, thermal expansion, etc. ( heading 90.27 ). … pyramid) is released from a pre‑determined height on to the surface of the piece under test. The harder the metal, the … out on bars (whether or not notched). The bar rests on two supports and is subjected to the repeated impacts of a ram …
… circuit elements and having multiple electrical functions, such as integrated circuits, are not considered as discrete … etc.) are created in the mass (essentially) and on the surface of a semiconductor material (doped silicon, for … Thus, they are preferred in applications where power supply is limited or where cooling problems are expected. …
… for instance, to control a motor pump or compressor which supplies a pressure tank, or to operate pneumatic valve … One pole of the transformer is also earthed. When the surface of the liquid comes into contact with the electrode, … device operates a signal or an appliance (generally remote) such as a steam or hot water intake valve, boiler burner, …
… diamond. When unworked, some synthetic stones, such as ruby and sapphire, may have the appearance of small … as regards the working to which the stones may be submitted, are also applicable here. Synthetic or … heading 70.18 (see corresponding Explanatory Note). ° ° ° Subheading Explanatory Notes. Subheading 7104.10 …
… etc.) and carbonaceous binders (e.g., pitch or tar), to a sufficiently high temperature (2500 to 3200 °C) to ensure its “graphitisation” under the catalytic action of substances present in the mixture (e.g., silica or iron … at about 1000 °C and then graphitised, or they may be submitted directly to the graphitisation process. In …
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