Xylans were selectively removed from paper grade pulps by nitren extraction in order to produce dissolving pulps. The impact of nitren charge on the removal of hemicelluloses was demonstrated for a birch and mixed softwood kraft pulp. The 95% purity level could easily be reached for the birch kraft pulp. Softwood glucomannans were almost insoluble under the investigated extraction conditions ap...

Basic fiber properties can be classified into four categories: Size distribution, shape, structure of the cell wall and the fiber surface. This approach was used when long fiber fractions separated from 10 different mechanical pulps and unrefined and refined chemical pulp samples were compared in order to shed light on the different reinforcing abilities of chemical and mechanical pulp fibers. ...

Among 60 vining species growing almost exclusively in the Northern hemisphere, only the grapevine (Vitis vinifera L.) (Vitaceae) is the single species largely used in the global wine industry. Grapes are important sources of antioxidants, such as phenolic compounds. The antioxidant activity of these polyphenols is considered much higher than that of the essential vitamins, thus contributing sig...

Mamey apple (Mammea americana) is a tropical fruit largely consumed and more coveted as it rich source of antioxidants. There considerable interest in fruits phenolic compounds due to their different characteristics particularly role protection against cardiovascular diseases cancers through antioxidant activity. Nutritional were determined six mamey accessions: Sonson, Pavé 11, Lézarde, Ti Jac...