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101.
This work focuses on the influence of the source of organic matter on the process of biomass adhesion on polyurethane foam matrices in fixed-bed anaerobic immobilized-sludge reactors. Five experiments were performed in differential 'gradientless' reactors fed with meat extract (protein), glucose, starch, lipids and complex substrate. The polyurethane foam colonization process was monitored temporally in each experiment to identify the amount of biomass buildup, extracellular polymer production and the morphological characteristics of the cells adhering to the support. Different immobilization patterns were observed for the different substrates used. The morphological variety was found to be dependent on the substrate constituents. Polymer excretion was apparently crucial in the colonization process of the polyurethane matrices and was likely related to cell fixation on the support. The production of extracellular polymeric substances speeded up the initial fixation of microorganisms on the polyurethane surface. 相似文献
102.
The formation of bound residues by naphthalene and its metabolite, cis-naphthalene-1,2-dihydrodiol, in a sediment (1% OC), a silty loam soil (2.9% OC) and a peat (26% OC) was examined. The experiments were carried out under both sterile and nonsterile conditions for up to 35 days. The samples containing bound contaminant were hydrolyzed at an alkaline pH and fractionated using 3,000 and 500 Da molecular weight cutoff ultrafiltration membranes in series. The results for all the geosorbents examined showed that bound residue formation is low for naphthalene and between 5 and 20 times higher for the metabolite. The amount of bound residues released by hydrolysis was higher for the metabolite than for the parent compound for all the samples. The molecular weight distribution of bound radioactivity after hydrolysis showed binding to the high molecular weight components of the sediment organic matter and to the low molecular weight components for soil and peat organic matter when incubated with cis-naphthalene-1,2-dihydrodiol. Experiments performed with naphthalene-UL-(14)C showed larger amounts of bound residue found than in experiments with naphthalene-1-(14)C. 相似文献
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Silva Lídia Gaudêncio Ribeiro Costa Elizângela Pinheiro Starling Maria Clara Vieira Martins dos Santos Azevedo Taíza Bottrel Sue Ellen Costa Pereira Renata Oliveira Sanson Ananda Lima Afonso Robson José Cassia Franco Amorim Camila C. 《Environmental science and pollution research international》2021,28(19):24067-24078
Environmental Science and Pollution Research - The goal of this work was to evaluate the performance of the LED irradiated photo-Fenton process on the removal of (i) estrogenic activity and (ii)... 相似文献
106.
Ribeiro Camila Silva Lansarin Marla Azário 《Environmental science and pollution research international》2021,28(19):23667-23674
Environmental Science and Pollution Research - The conversion of CO2 into new carbon-based products, such as fuels and chemicals, is an attractive and promising means of mitigating global energy... 相似文献
107.
Malacarne Ingra Tais De Souza Daniel Vitor Alpire Maria Esther Suarez Souza Ana Carolina Flygare Renno Ana Claudia Muniz Ribeiro Daniel Araki 《Environmental science and pollution research international》2021,28(46):65083-65093
Environmental Science and Pollution Research - The aim of this review was to evaluate if micronucleus assay in oral exfoliated cells is a suitable tool for biomonitoring children exposed to... 相似文献
108.
Many chemicals are released into the environment, and chemical contamination has been suggested as a contributing factor to
amphibian declines. To add to a growing body of knowledge about the impact of individual chemicals on non-target organisms,
we examined the specificity of deformities induced by exposure to four pesticides (atrazine, 2,4-dichloropheoxyacetic acid (2,4-D),
triadimefon, and glyphosate) in the model amphibian species, Xenopus laevis. We focused on the period of organ morphogenesis, as it
is frequently found to be particularly sensitive to chemical exposure yet also commonly overlooked.We found similar levels of intestine
malformations and edemas, as well as disruption of skeletal muscle, in atrazine and triadimefon exposed tadpoles. The e ects of 2,4-D
were only apparent at the highest concentrations we examined; glyphosate did not induce dramatic malformations at the concentrations
tested. While researchers have shown that it is important to understand how chemical mixtures a ect non-target organisms, our results
suggest that it is first crucial to determine how these chemicals act independently in order to be able to identify consequences of
individual pesticide exposure. 相似文献
109.
Karine?Delevati?ColpoEmail author Liara?Colpo?Ribeiro Bruna?Wesz Ludmilla?Oliveira?Ribeiro 《Die Naturwissenschaften》2012,99(4):333-336
In order to determine the feeding preference of Aegla platensis in streams and the importance of microorganisms in its detritivore diet, we carried out two experiments designed to evaluate
the food preferences of A. platensis (1) among leaves with different levels of microbial colonization and (2) among insect larvae (Chironomidae, Simuliidae, Hydropsychidae)
and microbially conditioned leaves. A. platensis preferred animal over plant food items; when only leaves were offered, this aeglid preferred the leaves with higher levels
of microorganism conditioning. 相似文献
110.
Faria Maria Graciela Iecher Avelino Katielle Vieira Philadelpho Biane Oliveira dos Santos Bomfim Rafaela do Valle Juliana Silveira Júnior Affonso Celso Gonçalves Dragunski Douglas Cardoso de Souza Ferreira Ederlan de Souza Carolina Oliveira Ribeiro Camila Duarte Ferreira Colauto Nelson Barros Linde Giani Andrea 《Environmental science and pollution research international》2022,29(58):87519-87526
Environmental Science and Pollution Research - Lentinus crinitus bioaccumulates lithium in mycelia, but bioaccumulation may be affected by pH of the culture medium. Lithium is used in clinical... 相似文献