The influence of residual black liquor in pulp on wastewater pollution after the bleaching process was studied. The results show that the CODCr in bleaching effluent has a remarkable linearity with bleaching loss of pulps without residual black liquor. For pulps with some residual black liquor, more than 34% of the overall CODCr is produced by the residual black liquor. It follows that more eff...

Laccases oxidize variety of aromatic and non aromatic compounds by using oxygen as the electron acceptor and producing water as by-product. Generally laccases need mediators for catalyzing the removal of lignin from pulp. The potential of laccase mediator system (LMS) to degrade lignin polymer has been demonstrated by many researchers, but still the high cost and possible toxicity of artificial...

Microbial enzymes are enabling new technologies for processing pulps and fibers. Xylanases reduce the amount of chemicals required for bleaching; cellulases smooth fibers, enhance drainage, and promote ink removal; lipases reduce pitch; lignin-degrading enzymes remove lignin from pulps. Several of these processes are commercial, and others are beginning to emerge. In the future, enzyme-based pr...

The stressed pulp condition is a clinical concept that describes pulps that have received repeated previous injury and survived with diminished responses and lessened repair potentials. Before performing restorative dentistry the dentist should conduct a comprehensive pulpal health evaluation on teeth to be restored. This evaluation should include (1) traditional pulp-testing methods and (2) a ...

A wide variety of microorganisms can contaminate food products. Due to low pH, fruits are mostly spoiled by fungi. The growth fungi on depends the characteristics and environmental factors. In this context, predictive microbiology is one option for studying designing strategies control microbial foods. Thus, aim work was develop a model predict spoilage acid contaminated Byssochlamys fulva spor...

Humic acid (HA) is a kind of organic substance that has shown good effects in regard to promoting crop growth. In the current study, influences three kinds fertilizers mainly containing humic/fulvic acids, including water-soluble fertilizer humic (WHA), fulvic potassium (FAP), and distillate (FAD), on qualities ‘Eureka’ lemon fruits were investigated systematically at their different harvest ti...

This research investigates the potential health benefits of extracts from seeds, peels, and pulps quince, medlar, bletting medlar fruits. Our study reveals that polyphenol content is higher in skin than flesh fruits tested, with highest concentration found fresh (1148 mg GAE/100 gDM). The quince show antioxidant activity (ABTS, DPPH, FRAP tests), while pulp medlars exhibits inhibition ability a...