نتایج جستجو برای: biodegradable catalyst
تعداد نتایج: 56637 فیلتر نتایج به سال:
One of the greatest challenges to modern technologies is what to do with them when they go irreparably wrong or come to the end of their productive lives. The convention, since the development of modern civilisation, is to discard a broken item and then procure a new one. In the 20th century enlightened environmentalists campaigned for recycling and reuse (R&R). R&R has continued to be an impor...
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...
The widespread use of H and 14C in research has generated a large volume of waste mixed with scintillation liquid, requiring an effective control and appropriate storage of liquid radioactive waste. In the present study, we compared the efficacy of three commercially available scintillation liquids, Optiphase HiSafe 3, Ultima-Gold AB (biodegradable) and Insta-Gel-XF (non-biodegradable), in term...
Abstract A blend of poly(butylene adipate terephthalate) (PBAT) and polylactide (PLA) is a combination biodegradable materials. This study aims to prepare compatibilized PBAT/PLA in cost-effective timesaving way process the material into blown films by fine-tuning processing parameters. First, catalyst masterbatch prepared transesterification PBAT PLA presence tetrabutyl titanate (TBT) as catal...
Material and methods: A new module making use of newer methods and techniques was designed and implemented. Solid waste was collected in two segregated forms viz. biodegradable and non biodegradable at the household level and was transported in separate containers to the segregation site. Biodegradable waste was introduced into vermiculture ponds and non biodegradable waste was segregated into ...
Intimal hyperplasia appears to differ after implanting a drug-eluting stent (DES) with a biodegradable or a permanent polymer. The aim of the present study was to compare biodegradable with permanent polymer DES, since the available data are limited. One hundred patients with de novo coronary artery stenosis were included in this study. The patients were classified into 2 groups: DES with a bio...
The use of plastic materials in agriculture causes serious hazards to the environment. The introduction of biodegradable materials, which can be disposed directly into the soil can be one possible solution to this problem. In the present research results of experimental tests carried out on biodegradable film fabricated from natural waste (corn husk) are presented. The film was characterized by...
This paper presents the fabrication process, characterization results and basic functionality of silicon microneedles array with biodegradable tips. In order to avoid the main problems related to silicon microneedles: broking of the top part of the needles inside the skin, a simple solution can be fabrication of microneedles array with biodegradable tips. The silicon microneedles array was fabr...
Biodegradable materials are used in packaging, agriculture, medicine and other areas. In recent years there has been an increase in interest in biodegradable polymers. Two classes of biodegradable polymers can be distinguished: synthetic or natural polymers. There are polymers produced from feedstocks derived either from petroleum resources (non renewable resources) or from biological resources...
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