Pumpkins are very versatile in their uses for cooking. Most parts of the pumpkin are edible, including pulp and the fleshy shell (peel). Three pumpkin cultivars (Cucurbita maxima D.) namely: Kafr El-Battikh-2 (KB), El-Zarka (EZ) and Faraskour (FK), cultivated in Assiut, Egypt were studied for their pectin, beta carotene and tocopherol contents. The pectin content was determined spectrophotometr...

The water retention properties of papermaking fibers have been investigated by a "pressure plate" technique which permits measurement equilibrium moisture contents pulp samples at precisely controlled relative vapor pressures between 0.99 and 1.00. This range encompasses the interest in from table to middle drier section. Water isotherms are drawn satisfactorily related desorption reported lite...

The need of dissolving pulp (DP) for rayon fiber production is increasing rapidly in recent years. Sustainable sources DP raw materials and an effective manufacturing process are urgently required. This study aims to manufacture with high brightness from Sansevieria-trifasciata (ST) through the pre-hydrolysis, soda-Anthraquinone (Soda-AQ) cooking, chlorine-free bleaching processes. cellulose co...

Oklahoma Cooperative Extension Service • Division of Agricultural Sciences and Natural Resources Paper is a thin sheet usually manufactured from cellulose pulp derived from wood and other lignocellulosic materials such as cotton, rice or wheat straw for writing, printing and packaging purposes. Some of the important production processes and properties of different kind of papers will be reviewe...

Abstract Autohydrolysis-based pretreatments enable extraction of hemicellulose from wood tissue prior to the paper pulp cooking processes enabling their further use as platform chemicals and in material applications. In this study, hot water birch meal was conducted a small flow-through system. The combination high surface area milled with increased driving force induced by constant flow freshw...

N AN earlier study by the current authors, Gustafson’s model [1] has been applied to the modelling of the kappa number profile of a traditional Kamyr process [2]. In Downflow Lo-Solids cooking [3, 4] the process and flow conditions differ from the ones of the traditional Kamyr. The cooking reactions are, however, the same in both processes and more measurements and control variables are availab...