Sökning: "pulps"
Visar resultat 1 - 5 av 123 avhandlingar innehållade ordet pulps.
1. On the importance of oxidizable structures in bleached kraft pulps
Sammanfattning : After cooking, kraft pulps always contain not only residual lignin but also significant amounts of hexenuronic acid and other non-lignin structures oxidizable by permanganate under the standard kappa number determination conditions. These here referred to as false lignin. LÄS MER
2. Some aspects on TCF-bleachability of softwood alkaline pulps
Sammanfattning : The bleachability of softwood oxygen delignified pulps has been studied, i.e. the ease (requirement of bleaching chemicals) with which the pulps can be brightened to a target brightness in totally chlorine free (TCF) bleaching stages, including hydrogen peroxide, ozone and chelating agent stages. LÄS MER
3. Chemical analysis to promote the use of wild fruits from Mozambique
Sammanfattning : Abstract Wild fruit trees have significant cultural and socio-economic value in rural areas of Mozambique. Most of the wild fruits are seasonal and are available mainly in the wet season. Generally they have a short shelf-life and are eaten fresh or after minimal processing; the most common method of preservation is sun-drying. LÄS MER
4. Wetting and swelling of modified cellulose fibers
Sammanfattning : .... LÄS MER
5. Delignification and bleachability of kraft pulps pretreated with nitrogen dioxide
Sammanfattning : .... LÄS MER