Colour density

Somers, T.C. and Evans, M.E., Wine quabty correlations with colour density and anthocyanin equilibria in a group of young red wines, J. Set Food Agric., 25, 1369, 1974. 

Formula. Solubility in 2 litres of Water at 25° 0. (gram-mols.). Temperature at which Crystals Melt in their Water of Crystallisation. Colour. Density. 

He predicted the colour, density and melting point as well as its atomic weight. 

Arrange the following quantities in a table to show which are physical and chemical properties, which are qualitative, and which are quantitative melting point, colour, density, reactivity with acids, flammability, malleability, electrical conductivity, boiling point, reactivity with air, hardness, toxicity, brittleness. 

Mineral. Chemical composition. Colour. Density Hardness (Mohs scale). Crystallo- graphic system. 

A few compounds of cobalt and tin have been described. By fusing together at high temperatures an excess of stannic oxide and cobaltous oxide, using potassium chloride as a flux, Basic Cobalt Stannate, CoSnO,.CoO or Co2Sn04, is obtained.1 The potassium chloride is removed from the cooled mass with water, whilst warm dilute hydrochloric acid effects the solution of the stannate. The pure salt is dark green in colour density 6-30 at 18° C. 

Nickel Monoselenide or Nickel Selenide, NiSe, results in regular double tetrahedra when nickel is exposed at dull red heat to vaporised selenium diluted with nitrogen. It is also obtained by the action of hydrogen selenide upon anhydrous nickel chloride at bright red heat.7 It is greyish blue in colour. Density 8-46. 

Nickel Arsenide, NiAs, is formed by the above method at 400-800° C. It is identical with the mineral niccolite or nickeline, and has, like it, a red colour. Density 7-57. 

Barium platinocyanide tetrahydrate can exist in two isomeric forms, which, however, are crystallographically identical. They differ in colour, density, and in fluorescence, as indicated in the following table 2 ... 

Lead triethyl, EtsPb.-Sixty-five grams of lead triethyl chloride, covered with 100 c.c. of distilled water, are treated with 40 c.c. of 5-Normal sodium hydroxide and the mixture stirred until solution is complete. Addition of 200 c.c. of 5-Normal sodium hydroxide precipitates the lead triethyl hydroxide, which is separated. Sixty grams of the latter in 200 c.c. of 95 per cent, alcohol are electrolysed with lead electrodes, using a current density of 0-01 amperes per sq. cm. Lead triethyl forms as an oil at the cathode. It is pale yellow in colour, density 1 94, and readily oxidised in air, giving a yellowish powder. It may be distilled in steam, and at 2 mm. pressure it boils at 100° C., but it decomposes when distilled at ordinary pressure. It is still liquid at C. In dilute solution it corresponds to the simple formula,... 

The spectral properties of wines were measured with a Varian 300 UV/Vis spectrophotometer, and wine colour density (absorbance [420 nm + S20 nm]), hue (absorbance [420 nm / 520 nm]), and non-bleachable pigments (absorbance 520 nm in presence of SO2) were determined as described by Somers and Evans... 

The inputs or incoming signals to a process control scheme can be from a variety of measurement sources. In general these can either be measurements of the process conditions or measurements of the process materials involved in the operation. Temperature, pressure and flow are the most common process conditions used. As process control becomes more demanding then chemical and physical measurements of the materials being processed or produced can be used. These include for example colour, density and chemical composition. This is the important link to chemical measurements and the spectroscopic applications, which are the subject of this section of this handbook. 

GRADE APPLICATION/DESCRIPTiON COLOUR DENSITY CATALYST CURE TIME... 

Jute fibres are kept hanging on makeshift hangers for drying this process takes about 2 to 3 days. Grading becomes imperative depending on the fineness, colour, density, clearness etc., that are aU taken into account. The crop then proceeds to the hands of buyer. 

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