نتایج جستجو برای: Biodegradability

تعداد نتایج: 2746  

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...

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...

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...

Journal: :Molecules 2004
James R Baker Dragan Gamberger James R Mihelcic Aleksandar Sabljić

This study presents a review of biodegradability modeling efforts including a detailed assessment of two models developed using an artificial intelligence based methodology. Validation results for these models using an independent, quality reviewed database, demonstrate that the models perform well when compared to another commonly used biodegradability model, against the same data. The ability...

Journal: :Chemosphere 2014
Mandy Schneider Fabian Meder Annette Haiß Laura Treccani Kurosch Rezwan Klaus Kümmerer

Engineered sub-micron particles are being used in many technical applications, leading to an increasing introduction into the aquatic environment. Only a few studies have dealt with the biodegradability of non-functionalized organic particles. In fact the knowledge of organically surface functionalized colloids is nearly non-existent. We have investigated the biodegradability of organically sur...

Journal: :Bioresource technology 2011
H K Ahn M S Huda M C Smith W Mulbry W F Schmidt J B Reeves

The biodegradability of three types of bioplastic pots was evaluated by measuring carbon dioxide produced from lab-scale compost reactors containing mixtures of pot fragments and compost inoculum held at 58 °C for 60 days. Biodegradability of pot type A (composed of 100% polylactic acid (PLA)) was very low (13 ± 3%) compared to literature values for other PLA materials. Near infrared spectrosco...

Journal: :Arhiv za higijenu rada i toksikologiju 2003
Andreja Zgajnar Gotvajn Jana Zagorc-Koncan

Biodegradation is generally recognised as an important removal mechanism for pollutants in natural ecosystems. It determines the concentration of substances in the environment. According to the legislation of the European Union, there are three levels for biodegradability testing protocols for chemicals which cover different test conditions. This paper describes one such multilevel approach to ...

Journal: :International Journal of Molecular Sciences 2009

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