نتایج جستجو برای: synthetic fibers
تعداد نتایج: 210442 فیلتر نتایج به سال:
The increased surface area-to-volume ratio of nanoparticles, quantum size effects and the ability to tune surface properties through molecular modification make nanostructures ideal for environmental remediation. The present piece of work reports the preparation and characterization of nano cellulosic fibers (NCFs) with further polymeric reinforcement using vinyl sulphonic acid for the remediat...
The increased surface area-to-volume ratio of nanoparticles, quantum size effects and the ability to tune surface properties through molecular modification make nanostructures ideal for environmental remediation. The present piece of work reports the preparation and characterization of nano cellulosic fibers (NCFs) with further polymeric reinforcement using vinyl sulphonic acid for the remediat...
This study investigates the possibility of replacing minimum web reinforcement in deep beams with discrete fibers. Additionally, equivalent dosage fibers required to obtain similar performance beam is investigated. Deep made plain concrete no fibers, as per AASHTO LFRD recommendations (0.3% both horizontal and vertical), a 0.5% volume fraction steel, macro-synthetic hybrid are tested at shear s...
Synthetic fibers, especially polyester, have over past decades managed to overtake and dominate the textile industry. Microplastic fibers are shed from synthetic textiles during their user phase, primarily washing. However, there is little known about origin, except that they likely embedded in already since production. Therefore, we systematically examined presence of microplastic process yarn...
Synthetic Lycra spandex fibers were coated with 3-methylcholanthrene (3MC) and inserted into the lumina of 104 tracheas removed from young adult inbred Syrian hamsters. Tumors appeared 3 to 21 months after implantation of these tracheal grafts in syngeneic animals. 3MC in amounts ranging from 9 to 75 microgram/fiber induced a diversity of neoplasms in tracheal epithelium, the majority of which ...
High aspect ratio nanotubular assemblies can be effective fillers in mechanically reinforced composite materials. However, most existing nanotubes used for structural purposes are limited in their range of mechanical, chemical, and biological properties. We demonstrate an alternative approach to mechanical reinforcement of polymeric systems by incorporating synthetic D,L-cyclic peptide nanotube...
Synthetic Lycra spandex fibers were coated with 3methylcholanthrene (3MC) and inserted into the lumina of 104 tracheas removed from young adult inbred Syrian hamsters. Tumors appeared 3 to 21 months after implan tation of these trachea! grafts in syngeneic animals. 3MC in amounts ranging from 9 to 75 /¿g/fiberinduced a diversity of neoplasms in trachea! epithelium, the majority of which were c...
Dietary fiber is a nutritional concept based not on physiological functions but on defined chemical and physical properties. Recent definitions of dietary fiber differentiate inherent plant cell wall-associated fiber from isolated or synthetic fiber. For the latter to be defined as fiber, beneficial physiological effects should be demonstrated, such as laxative effects, fermentability, attenuat...
Exposures to asbestos and synthetic fibers remain areas of great concern in the field of occupational lung disease. Despite extensive study, the health effects associated with fibers remains an area of substantial controversy. In particular, effects of fibers at relatively low doses, particularly for mesothelioma, remain a matter of evolving opinion, especially when integrated with the divergen...
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