نتایج جستجو برای: Oxo-biodegradability

تعداد نتایج: 14850  

Journal: :Macromol 2023

This review considers the recent investigations in scope of biodegradability synthetic polymers, spanning polyethylene (PE), polypropylene (PP), and their corresponding composites, with a focus on influence oxo-additives (mostly transition metal salts). The types mechanisms oxidation acceleration are discussed. Furthermore, both physicochemical biological stages degradation is evaluated (labora...

Journal: :Materials Research-ibero-american Journal of Materials 2023

Biodegradability of five commercial plastic bags labelled as “biodegradable” and two referent materials were studied by a soil test for three months. As control experiment, studying abiotic degradation under the climatic impact (ultraviolet, temperature, moisture) in weatherometer was performed. The changes bag samples after tests detected optical microscopy, Fourier-transform infrared spectros...

Journal: :Universitas scientiarum 2023

Based on recent scientific-technical developments referring to the transformation and biodegradation mechanisms of plastic compounds, progress has been made both in conceptualization relevant definitions development technical standards that allow determining, a more precise reproducible way, ratio biodegradability determined material. From these advances, they have developed, furthermore, so-ca...

2012
Shuangchun Yang Guobin Liu Jinhui Zhang Yi Pan Fuxia Chen

Biodegradability , are known as biological degradation degree of biodegradable organic pollutants by microorganisms. Organic biodegradability can be divided into aerobic biodegradability and anaerobic biodegradability. At present, evaluation methods for biological degradation degree include aerobic biodegradability method of relative oxygen consumption or rate method, integrated test evaluation...

پایان نامه :وزارت بهداشت، درمان و آموزش پزشکی - دانشگاه علوم پزشکی و خدمات بهداشتی درمانی تهران 1356

چکیده ندارد.

Journal: :journal of the iranian chemical research 0
vijay v. dabholkar organic research laboratory, department of chemistry, kc college, churchgate, mumbai, india sunil r. patil organic research laboratory, department of chemistry, kc college, churchgate, mumbai, india rajesh v. pandey organic research laboratory, department of chemistry, kc college, churchgate, mumbai, india

indandione 1 was brominated to yield 2-bromoindandione 2 which on further reacted with substituted thiocarbamides, carbamides, 2-aminothiophenols, 2-aminophenol and triazoles to furnished 3-substituted aniline-2-thia-4-aza-6,7-benzo-8-oxo-bicyclo [3.3.0]-1(5),3-octadiene 3, 3-substituted aniline-2-oxa-4-aza-6,7-benzo-8-oxo-bicyclo [3.3.0]-1(5),3-octadiene 4, 2-thia-5-aza-9-oxo-3,4-(3’-substitut...

Journal: :Chemosphere 2011
Klaus Kümmerer Jakob Menz Thomas Schubert Wim Thielemans

Synthetic nanoparticles have already been detected in the aquatic environment. Therefore, knowledge on their biodegradability is of utmost importance for risk assessment but such information is currently not available. Therefore, the biodegradability of fullerenes, single, double, multi-walled as well as COOH functionalized carbon nanotubes and cellulose and starch nanocrystals in aqueous envir...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1392

در این مطالعه، تشکیل گونه ی منگنز – اکسو توسط mntpp ( oac ) در حضور اوره هیدروژن پروکسید به عنوان اکسیدان، هالیدها و برخی از دهنده های نیتروژنی به عنوان لیگاند محوری مورد بررسی قرار گرفت. تشکیل گونه ی اکسو از روی رشد پیک مربوط به گونه ی مورد نظر با استفاده از طیف بینی uv – vis بررسی گردید. تأثیر عوامل مختلف مانند: ماهیت لیگاند محوری، نسبت مولی لیگاند محوری: mntpp ( oac ) او نسبت مولی اکسیدان:...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2004
mahmood torabi angaji hamid reza hagheeghatpadjooh

it has been proven that polyolefins specially low density polyethylene (ldpe), are resistant against degradation and microorganism attacks; thus, one of the most important properties of industrial plastics, is their environmental biodegradability. since plastics are being widely used in agriculture, horticulture and packaging, meeting this requirement becomes increasingly dificult (specially in...

2010
Jim Yu Yu Su Margaret H. Dunham

The ability to predict the biodegradability of a given compound is crucial in understanding the fate of this compound in the environment, which can have tremendous public health implications. Traditionally, the biodegradability prediction relies on the regression analysis utilizing quantitative structural relationships. This paper presents a novel prediction method utilizing neural networks and...

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