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11.
Contents and methods of soil geography in Slovenia
Ana Vovk, 2002, pregledni znanstveni članek

Ključne besede: pedogeography, soils, Slovenia, ecology, environmental programmes
Objavljeno v DKUM: 07.06.2012; Ogledov: 1319; Prenosov: 26
URL Povezava na celotno besedilo

12.
PCA - a powerful method for analyze ecological niches
Franc Janžekovič, Tone Novak, 2012, samostojni znanstveni sestavek ali poglavje v monografski publikaciji

Ključne besede: principal component analysis, ecology, environment, biology
Objavljeno v DKUM: 07.06.2012; Ogledov: 2076; Prenosov: 154
URL Povezava na celotno besedilo

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Good quality printing with reactive dyes using guar gum and biodegradable additives
Reinhold Schneider, Sonja Šostar-Turk, 2003, izvirni znanstveni članek

Opis: In printing with reactive dyes sodium alginates or synthetic thickeners are typically used as thickening agents to prevent unacceptable fabric handle. A new reactive printing process for reactive dyes on cellulosic textiles has been developed using natural thickening agents and environmental-friendly additives. Printing trials with guar gums have shown that the use of differentadditives can prevent fabric stiffness. These additives have no significant influence on rheology and colour strength but contributed to soft fabric handle even when guar gums were used as thickening agent. The use of additives and guar gum provide good quality prints with reduced wastewater pollution.
Ključne besede: textile printing, guar gum, additives, fabric handle, printing quality, ecology, environmental protection
Objavljeno v DKUM: 01.06.2012; Ogledov: 2931; Prenosov: 87
URL Povezava na celotno besedilo

18.
Ecological alternatives to the reduction and oxidation processes in dyeing with vat and sulphur dyes
Mojca Božič, Vanja Kokol, 2008, pregledni znanstveni članek

Opis: This article gives a summary of the most commonly used ecologically unfriendly processes for the reduction and oxidation of vat and sulphur dyes. It also describes the new alternatives that are in the development stage and could be important in the near future. Sodium dithionite as the dominant reducing agent produces large amounts of sodium sulphate, and also toxic sulphite and thiosulphate as by-products. Consequently, high amounts of hydrogen peroxide and alkali are required for the treatment of effluents, which add to the cost of the process. Attempts have been made to use organic biodegradable reducing agents, enzymes, catalytic hydrogenation, and also indirect or direct, electrochemical reductive methods that employ a redox mediator (electron-carrier). The reduction has also been carried out via the dye radical molecule or, in the case of indigo, by direct electrochemical reduction using graphite as the electrode material. Physical techniques, for example using ultrasound, magnetic fields or UV have been shown to be effective only when used to accelerate methods using classical reduction and oxidation processes. However, although these methods offer some environmental benefits, there is still no satisfactory alternative reducing and/or oxidising agent available today.
Ključne besede: textile dyeing, vat dyes, sulphur dyes, reduction, oxidation, catalysis, ecology, organic agents, electrochemistry, ultrasound, magnetic field, UV application, biotechnology
Objavljeno v DKUM: 01.06.2012; Ogledov: 2810; Prenosov: 114
URL Povezava na celotno besedilo

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