نتایج جستجو برای: modeling plastics
تعداد نتایج: 396177 فیلتر نتایج به سال:
A method using high-performance liquid chromatograph (HPLC) was developed for the identification of colorants migrated from colored modeling clays, which are popular toys for children. Twelve permitted dyes and 25 non-permitted dyes were analyzed in 20 clays (10 wheat clays, 2 rice clays, 2 corn clays, 3 paper clays and 3 resin clays). As a result, 13 products which were labeled for children's ...
Flexible electronics are emerging as an alternative to conventional Si electronics for large-area lowcost applications such as e-paper, smart sensors, and disposable RFID tags. By utilizing inexpensive manufacturing methods such as ink-jet printing and roll-to-roll imprinting, flexible electronics can be made on low-cost plastics just like printing newspapers. However, the key elements of flexi...
Biodegradable plastics have been developed to eliminate the progressive accumulation and ever-growing threat posed by conventional fossil fuel-derived plastics. The impact of these bioplastics, particularly in an agricultural context (e.g. biopolymer mulch films), however, remains poorly understood. In this study, we compared biotoxicity biodegradable (polylactic acid, PLA; polypropylene carbon...
a b s t r a c t mortality and morbidity from trauma continues to be a serious, ubiquitous public health problem. our short communication reports on the benefits of a dedicated lower limb trauma coordinator (lltc) to the trauma service of a busy inner-london plastics unit. this is based on a retrospective case-note based audit; performed 19 months prior to the introduction of the lltc and for 16...
Hot-melt extrusion is commonly applied for forming products, ranging from metals to plastics, rubber and clay composites. It is also increasingly used for the production of pharmaceuticals, such as granules, pellets and tablets. In this context, mathematical modeling plays an important role to determine the best process operating conditions, but also to possibly develop software sensors or cont...
Research and development activities directed toward commercial production of cellulosic ethanol have created the opportunity to dramatically increase the transformation of lignin to value-added products. Here, we highlight recent advances in this lignin valorization effort. Discovery of genetic variants in native populations of bioenergy crops and direct manipulation of biosynthesis pathways ha...
A 379 should include UV exposure, even absent specific FDA requirements. Our resin data (resins P1. P2, P3, P4, P19, and P18) cited by Kelce and Borgert came from at least three replications of stress ing, extraction, and EA assays. As described in our " Methods " and " Supplemental Material, " the assay variance was very small: SEs were typically smaller than the diameter of the data points o...
The materials requirement inside a magnetic gradiometer is stringent because the presence of magnetic susceptible material will introduce intrinsic errors into the device. Many commercial grade non-magnetic materials still have unacceptably high levels of magnetic susceptibility between 10 and 10. It is shown here that machining with steel tools can further increase the susceptibility by up to ...
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