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This Test Guideline describes two methods for biodegradability in seawater. The shake flask method consists on dissolution of a pre-determined amount of the test substance in the test medium to yield a concentration of 5-40 mg/l dissolved organic carbon (DOC). Five flasks, at least, should be used: two for the test suspension, two for the blank and one for procedure control. The solution of the test substance in the test medium is incubated, under agitation in the dark or in diffuse light under aerobic conditions, at a fixed temperature which will normally be within the range 15-20°C. The recommended maximum test duration is about 60 days. Degradation is followed by DOC measurements (ultimate degradation) and, in some cases, by specific analysis (primary degradation). The closed bottle method consists on dissolution of a pre-determined amount of the test substance in the test medium in a concentration of usually 2-10 mg/l (one or more concentrations may be used).The solution is kept in a filled closed bottle in the dark in a constant temperature bath or enclosure controlled within a range of 15-20°C. The degradation is followed by oxygen analyses over a 28-day period but if the blank biological oxygen demand value remains within the 30 per cent limit, the test could be prolonged. Twenty-four bottles at least are used (8 for test substance, 8 for reference compound and 8 for sweater plus nutriment). All analyses are performed on duplicate bottles. Four determinations of dissolved oxygen, at least, are performed (day 0, 5, 15 and 28) using a chemical or electrochemical method.

Chemical tests and reagents --- Chemical reagents --- Reagents, Chemical --- Indicators and test-papers

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Waste paper --- 09:676 --- 676.2 --- 09:676 Handschriften en oude drukken: papier, watermerken --- Handschriften en oude drukken: papier, watermerken --- 676.2 Papers and boards --- Papers and boards --- Paper, Waste --- Wastepaper --- Paper --- Waste products --- Recycling --- Recyclage --- Papier

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Graphics industry --- Applied arts. Arts and crafts --- 095.0 --- 676.267 --- 676.267 Decorative papers (treated by mechanical means). Patterned paper. Marbled paper. Embossed paper. Cre_*pe paper. Clupak --- Decorative papers (treated by mechanical means). Patterned paper. Marbled paper. Embossed paper. Cre_*pe paper. Clupak --- 095.0 Techniek van de boekband--; zie ook {686.1} --- Techniek van de boekband--; zie ook {686.1}

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745.54 --- 747 --- 676.267 --- 20e eeuw --- 774.99 --- Dürer, Albrecht --- Morris, William --- art deco --- art nouveau --- behangpapier --- geschiedenis --- Kunstvoorwerpen van papier. Papierkunst --- Interieurkunst. Binnenhuisarchitectuur --- Decorative papers (treated by mechanical means). Patterned paper. Marbled paper. Embossed paper. Cre_*pe paper. Clupak --- binnenhuis- en meubelkunst, onderdelen van het interieur, overige onderdelen, o.a. behang --- 676.267 Decorative papers (treated by mechanical means). Patterned paper. Marbled paper. Embossed paper. Cre_*pe paper. Clupak --- 747 Interieurkunst. Binnenhuisarchitectuur --- 745.54 Kunstvoorwerpen van papier. Papierkunst --- Wallpaper --- Wall-paper --- Decorative paper --- Wall coverings --- Paperhanging --- History --- Wallpaper - History.

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338.22 --- 338.12 --- Economic stabilization --- -Economic stabilization --- -Adjustment, Economic --- Business stabilization --- Economic adjustment --- Stabilization, Economic --- Economic policy --- 338.12 Conjunctuurbewegingen. Economische fluctuatie. Investeringscycli. Conjunctuuranalyse. Conjunctuuronderzoek. Conjunctuurprognoses --- Conjunctuurbewegingen. Economische fluctuatie. Investeringscycli. Conjunctuuranalyse. Conjunctuuronderzoek. Conjunctuurprognoses --- 338.22 Economische organisatieleer. Economisch beleid. Economische politiek --- Economische organisatieleer. Economisch beleid. Economische politiek --- Congresses --- -338.12 Conjunctuurbewegingen. Economische fluctuatie. Investeringscycli. Conjunctuuranalyse. Conjunctuuronderzoek. Conjunctuurprognoses --- Adjustment, Economic --- CL / Chile - Chili --- Papers of a conference held in Jerusalem, January 1990. --- 331.33 --- 333.841 --- 338.340 --- AA / International- internationaal --- AR / Argentina - Argentinië - Argentine --- BO / Bolivia - Bolivie --- BR / Brazil - Brazilië - Brésil --- IL / Israel --- LAM / Latin America - Latijns Amerika - Amérique Latine --- MX / Mexico - Mexique --- NBB congres --- Papers of a conference held in Jerusalem, January 1990 --- TR / Turkey - Turkije - Turquie --- YU / Yugoslavia - Yougoslavie --- Structureel beleid. Reglementering. Dereglementering. Ordnungspolitik --- Inflatie --- Algemene ontwikkeling in de Derde Wereld --- Conferences - Meetings --- Economic stabilization - Congresses