Search results for "biodegradation"

Wpływ sposobu dawkowania preparatu enzymatycznego na zmiany mikrobiologiczne i przemiany węglowodorów alifatycznych w glebie skażonej węglowodorami

2016

Usuwanie produktów ropopochodnych ze skażonej gleby jest trudnym procesem, wymagającym uwagi oraz stałej kontroli. W pracy podjęto próbę określenia wpływu techniki dawkowania preparatu enzymatycznego na zmiany mikrobiologiczne i przemiany węglowodorów alifatycznych w glebie naturalnie skażonej węglowodorami. Materiał do badań stanowiła gleba naturalnie skażona substancjami ropopochodnymi, w której całkowite stężenie węglowodorów alifatycznych o długości łańcuchów C8-C40 wynosiło 420,1 mg/kg suchej masy. Przeprowadzono doświadczenia wazonowe, dawkując preparat enzymatyczny w odstępach tygodniowych. Kontrolę stanowiła skażona gleba bez dodatku preparatu enzymatycznego. Doniczki inkubowano w t…

Fate of organic pollutants after sewage sludge spreading on agricultural soils: a 30-years field-scale recording

2006

Le DOI mentionné dans l'article 10.2166/WPT.2007.008 ne fonctionne pas; International audience; Toxic organic compounds, such as the surfactants linear alkylbenzene sulfonates (LAS) and nonylphenol polyethoxylates (NPE), Polycyclic aromatic hydrocarbons (PAH) and residues derived from plastics (PAE-phthalates) end up in sewage sludge. In order to evaluate and quantify the potential environmental risks associated with the xenobiotic introduction into biological life cycle, the EU BIOWASTE project (QLK5-CT-2002-01138) devotes one task to the study of the fate of xenobiotic in a sandy soil after sludge spreading on a 30-year field-scale record experiment. Experimental maize crop fields from Bo…

Biodegradation of organophosphorus pesticides by soil bacteria.

2009

A number of studies in the 1980s and 1990s showed that crop-protection products, applied to drained fields, could move downwards through the soil profile and to the groundwater. Organophosphorus insecticides (OPs) are used all over the world for crop protection, for other agricultural practices such as sheep dipping and, in aquaculture, for the control of sea lice. Ops besides showing a specific neurotoxicity and have also been related to various modern diseases, including Creutzfeldt–Jakob (CJD) and the Gulf War syndrome. Although OPs are less persistent than Organoclorine pesticides (OCs), they still constitute an environmental risks thus increasing the social concern about their levels i…

A route to simple nonionic surfactants

2016

AbstractA method for the synthesis of nonionic surfactants – N-alkyl-O-(2-hydroxyethyl) carbamates is proposed by acylation of fatty amines with ethylene carbonate without any solvent or catalyst. The surface tension of the prepared surfactants was measured, toxicity and biodegradability were determined for the surfactant with n-dodecyl as a hydrophobic group and N-monosubstituted amide and hydroxyl groups for their hydrophilic part.

Biodegradable Ultrasmall-in-Nano Gold Architectures: Mid-Period In Vivo Distribution and Excretion Assessment

2018

Biodegradable Metal-Organic Framework-Based Microrobots (MOFBOTs).

2020

Microrobots and metal–organic frameworks (MOFs) have been identified as promising carriers for drug delivery applications. While clinical applications of microrobots are limited by their low drug loading efficiencies and the poor degradability of the materials used for their fabrication, MOFs lack motility and targeted drug delivery capabilities. The combination of these two fields marks the beginning of a new era; MOF‐based small‐scale robots (MOFBOTs) for biomedical applications. Yet, biodegradability is a major hurdle in the field of micro‐ and nanoswimmers including small‐scale robots. Here, a highly integrated MOFBOT that is able to realize magnetic locomotion, drug delivery, and selec…

Etude de l'évolution du potentiel génétique de populations bactériennes dégradant l'atrazine

2011

Atrazine, one of the most used herbicide to control the development of weeds in crop, has led to the contamination of the environment. Repeated exposure to this herbicide resulted in the emergence of microbial populations able to degrade atrazine and to use it as a nitrogen source for its growth. These microbial populations are responsible for accelerated biodegradation of atrazine (BDA), a key ecosystemic service diminishing the persistence of this herbicide in the environment. The aim of this PhD work was to study genetic and physiological mechanisms responsible for functioning and improving of this ecosystemic service. We applied an experimental approach starting from genes to communitie…