نتایج جستجو برای: modeling plastics
تعداد نتایج: 396177 فیلتر نتایج به سال:
The potential of bio based plastics for replacement of petrochemical plastics is 90%, corresponding to 240 million tons per year.1 Bio-based materials such as polynucleotides, polyamides, polysaccharides, polyoxoesters, polythioesters, polyanhydrides, polyisoprenoids and polyphenols are potential candidates for substitution of synthetic plastics.2 Polyhydroxyalkanoates (PHAs), belonging the gro...
• Benn, T. M. and P. Westerhoff (2008). "Nanoparticle silver released into water from commercially available sock fabrics." Environmental Science & Technology 42(11): 4133-4139. [abstract] • Mueller, N. C. and B. Nowack (2008). "Exposure modeling of engineered nanoparticles in the environment." Environ. Sci. Technol. 42(12): 4447-4453. [abstract] • Blaser, S. A., M. Scheringer, et al. (2008). "...
conclusions the results suggest that b. coagulans is a good candidate for the fermentative production of phb. background biodegradable polyesters are candidates for the development of environmental friendly plastics. poly-β-hydroxybutyrate (phb) is a type of polyester from the hydroxyalkanoates family, synthesized by bacteria as an intracellular material and accumulated as granules in the cytop...
Over the past century, plastics have infiltrated all aspects of human life. From the plastic shrink wrapping that protects food from bacteria and fungus, to the Styrofoam cup that keeps coffee hot and soft drinks cold, to the life-saving medical equipment found in hospitals and doctor’s offices, plastic is everywhere. However, the popularity of plastics comes at great cost. Most plastics are de...
The objective of this research is to represent the managerial logic of Mr. Yung-Ching Wang, the Chairman of Formosa Plastics Group (also known as the “God of Business” in Taiwan) through the construction of knowledge maps using a text-mining approach, including automatic key phrase extraction, term identification, document vector modeling, and a clustering method named growing hierarchical self...
Plastics are inexpensive, lightweight and durable materials, which can readily be moulded into a variety of products that find use in a wide range of applications. As a consequence, the production of plastics has increased markedly over the last 60 years. However, current levels of their usage and disposal generate several environmental problems. Around 4 per cent of world oil and gas productio...
Biodegradable plastics are those that can be completely degraded in landfills, composters or sewage treatment plants by the action of naturally occurring micro-organisms. Truly biodegradable plastics leave no toxic, visible or distinguishable residues following degradation. Their biodegradability contrasts sharply with most petroleum-based plastics, which are essentially indestructible in a bio...
1 Definition of bioplastics The two main groups of bioplastics are biobased polymers and biodegradable plastics. Biobased polymers are derived from biomass sources, which are not necessarily biodegradable. Biodegradable plastics, on the other hand, can be either made of natural or fossil sources. In 2012, the IUPAC recommended a terminology for biorelated polymers [1, 2]. Two further, special c...
Plastics collection poses a quandary: if one wishes the easiest collection, the citizen must be given very simple instructions as to what plastics to set out; if the maxi mum collection of the many recyclable plastics is desired, one must accept mixed plastics. In either case, process ing is necessary: in the first, to control contamination; in the second to separate the polymers. Many sophis...
Plastics debris in the marine environment, including resin pellets, fragments and microscopic plastic fragments, contain organic contaminants, including polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons, petroleum hydrocarbons, organochlorine pesticides (2,2'-bis(p-chlorophenyl)-1,1,1-trichloroethane, hexachlorinated hexanes), polybrominated diphenylethers, alkylphenols and bis...
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