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41.
Renata Pilarczyk Jerzy Wójcik Paweł Czerniak Piotr Sablik Bogumiła Pilarczyk Agnieszka Tomza-Marciniak 《Environmental monitoring and assessment》2013,185(10):8383-8392
Concentrations of toxic heavy metals (cadmium (Cd), lead (Pb)) and major nutritional and trace elements (Ca, Mg, P, Cu, Fe, Mn, Se, Zn) were analyzed in the milk of Simmental (n?=?20) and Holstein-Friesian (n?=?20) cows from an organic farm. Elements were determined using inductively coupled plasma emission atomic spectrometry. The conducted research showed that the milk of Simmental cows was characterized by the more advantageous mineral composition and lower concentration of noxious heavy metals compared to the milk of Holstein-Friesian cows. In the milk of Simmental cows, significantly lower concentrations of Pb and Cd (P?<?0.001) and Cu (P?<?0.05) and significantly higher concentrations of Fe and Mg (P?<?0.05) as well as nonsignificantly higher concentrations of Ca, Mn, and Se were found. In the milk of both breeds, very low Cu concentrations were recorded. The higher-than-recommended concentration of Pb in milk was also found. In the milk of both breeds, the significant positive correlations between concentrations of the following elements were observed: Pb–Cd, Pb–Se, Cd–Se, Cd–Mn, Zn–Cu, Zn–P, Ca–P, Ca–Mg, and Mg–P. The correlations between other elements within each of the analyzed breeds separately were also found. 相似文献
42.
de Sousa Paloma Viana Ferreira de Oliveira André Fernando da Silva Antônio Alberto Lopes Renata Pereira 《Environmental science and pollution research international》2019,26(15):14883-14903
Environmental Science and Pollution Research - Recent studies have shown Cu(0) as a promising material for the removal of organic and inorganic pollutants. However, there is no review addressing... 相似文献
43.
Andreas Wade Gintaras Denafas Viktoras Racys Ingrida Rimaityte Renata Povilaityte 《Waste management & research》2006,24(1):27-36
The main purpose of this study was to carry out a retrospective analysis of solid waste generation in Kaunas city from 1994 to 2003 and to calculate the theoretical waste generation in the future. This paper also presents measurements of the annual variations of waste amounts and calculations on a theoretical waste incineration facility. Two waste treatment scenarios were considered. Scenario A: waste deposit at the landfill with 'implementation of domestic waste separation and recycling'. Scenario B: waste removal to a landfill with 'multi-treatment: household separation, recycling and energetic recovery'. Three levels of waste treatment were proposed. The first level was implementation of the recycling system, which included household waste separation. The next step involved mechanical-biological treatment. The third level was the construction and operation of a new waste incineration plant in Kaunas. Two sites in Kaunas city were proposed; however, more detailed analysis, including the economic factors, will need to be done. 相似文献
44.
g -glucosidase and alkaline phosphatase, two ectoenzymes involved in the microbial decomposition of polysaccharides and organic phosphates, were evaluated in water samples collected from two areas of the Northern Adriatic Sea during the multidisciplinary Prisma II research project. The distribution of g -glucosidase and alkaline phosphatase is reported together with that of leucine aminopeptidase, an enzyme involved in the degradation of protein compounds. The data obtained showed the prevalence of g -glucosidase in summer months in the northern area, located in front of the Po delta, while in winter it is higher in the southern area (in front of Ancona). Phosphatase activity during February, 1998 had a maximum of 107 r nml m 1 h m 1 at a coastal station in the northern area; this enzyme appeared to be mainly associated with phytoplankton because the increase in alkaline phosphatase was associated with the increase of phytoplankton biomass, measured by chlorophyll a content. The relations between the microbial activities and environmental parameters are discussed. 相似文献
45.
Rosabruna La Ferla Renata Zaccone Maurizio Azzaro Gabriella Caruso 《Chemistry and Ecology》2013,29(1-2):75-84
The carbon transfer through the microbial community in two areas of the Northern Adriatic Sea was estimated by proteolytic and respiratory activities during four oceanographic surveys carried out in June, 1996, 1997 and February, 1997, 1998. In front of the Po Delta (area A), the mean rates of proteolytic activity range from 4.9 to 9.9 r µg r C r h r l; near Ancona (area B), they range from 3.1 to 7.6 r µg r C r h r l. Respiratory rates vary between 0.19 and 2.29 and between 0.24 and 1.40 r µg r C r h r l in areas A and B, respectively. In general, high rates occur in the surface layers, within the first 10 r m of depth. In area A, proteolytic and respiratory rates undergo seasonal course, with high activity in warm periods. In area B, respiration and bacterioplankton abundance increase from the first to the second year, whilst proteolytic activity decreases. The sequence of metabolic steps in the carbon transfer within the bacteria, from the biotic vs . the abiotic compartment, was drawn in order to define the actual role of bacterial biomass in the biogeochemical fluxes in an ecosystem which often suffers distrophic crises. Respiratory turnover rates, in the upper 10 r m depth, reach low values in cold periods and high values in June, 1997. The carbon transfer versus mineralization flows better in the summer period, in particular in June, 1997. However, the bacterial growth efficiency ranges from 17 to 38% in area A and from 13 to 44% in area B with highest values in February, 1997, when bacteria contribute in a relevant way to the overall respiration. 相似文献
46.
Gabriella Caruso Renata Denaro Maria Genovese Laura Giuliano Monique Mancuso Michail Yakimov 《Chemistry and Ecology》2013,29(3):167-181
The development of monitoring strategies for the early warning of seawater pollution, with particular reference to faecal and hydrocarbon contamination, has been the specific goal of research carried out within the Cluster 10-SAM (Advanced Systems for Coastal Marine Monitoring) Project, funded by the Italian Ministry for University and Scientific Research. Advanced analytical approaches have been designed and applied to detect bacterial species that have been selected as potential indicators of pollution in seawater samples. We report the results obtained using the fluorescent antibody and enzymatic assays for the detection of Escherichia coli, and a real-time PCR protocol for monitoring marine areas for hydrocarbon pollution. Immunofluorescence and enzymatic methods revealed the occurrence of different faecal pollution levels, reaching 105 E. coli cells 100 ml?1 in the Straits of Messina. Real-time PCR results corresponded to the different degree of oil pollution of the analysed samples. The specificity and speed make these methods promising for the detection and evaluation of marine pollution. 相似文献
47.
Caritá Renata Mazzeo Dânia Elisa Christofoletti Marin-Morales Maria Aparecida 《Environmental science and pollution research international》2019,26(21):21475-21483
Environmental Science and Pollution Research - A problem that has been dragging in recent decades is the final disposal of the waste produced in the wastewater treatment process. In addition to its... 相似文献
48.
de Toledo Renata Alves Hin Chao U. Shen Tingting Lu Qihong Li Xueqing Shim Hojae 《Environmental science and pollution research international》2019,26(12):11591-11604
Environmental Science and Pollution Research - This study evaluated the reutilization of waste materials (scrap tires, sewage sludge, and wood chips) to remove volatile organic compounds (VOCs)... 相似文献
49.
Renata Cristina Ferreira Bonomo Taline Amorim Santos Leandro Soares Santos Rafael da Costa Ilhéu Fontan Luciano Brito Rodrigues Ana Clarissa dos Santos Pires Cristiane Martins Veloso Olga Reinert Ramos Gandolfi Paulo Bonomo 《Journal of Polymers and the Environment》2018,26(2):508-517
Jackfruit starch based biodegradable films containing lysozyme were characterized for their antimicrobial activity, thickness, solubility, water vapor permeability and mechanical properties. The biodegradable films had good appearance and antimicrobial activity against Micrococcus lysodeikticus. The thickness of the biodegradable films were not affected by the variation in pH, but the addition of lysozyme increased the thickness, the thickest films being those with the highest lysozyme concentrations. The variation in pH of the filmogenic solutions affected the solubility of the biodegradable films, water solubility being greatest at pH 7.0 and with the highest lysozyme concentration. The permeability of the biodegradable films was increased by incorporating lysozyme. The lysozyme concentration and pH variation caused changes in the mechanical properties. The addition of 8% lysozyme increased the tensile strength and Young’s modulus for all the pH values studied. With respect to the release of antimicrobial activity, the diffusion of lysozyme was shown to follow Fickian transport mechanism. 相似文献
50.
Characterization of Atrazine-Loaded Biodegradable Poly(Hydroxybutyrate-Co-Hydroxyvalerate) Microspheres 总被引:2,自引:0,他引:2
Renato Grillo Nathalie F. S. de Melo Renata de Lima Roberto Wagner Lourenço André Henrique Rosa Leonardo Fernandes Fraceto 《Journal of Polymers and the Environment》2010,18(1):26-32
Polyhydroxybutyrate-co-hydroxyvalerate microspheres (PHBV-MS) were prepared as a delivery system for the herbicide atrazine
(ATZ). Characterization of the system included investigation of in vitro release properties and genotoxicity. ATZ − PHBV-MS
particle diameters showed a size distribution range of 1–13 μm. Differential scanning calorimetry analyses indicated that
ATZ was associated with the PHBV microparticles. The release profiles showed a different release behavior for the pure herbicide
in solution, as compared with that containing ATZ-loaded PHBV-MS. Korsmeyer–Peppas model analyses showed that atrazine release
from the microparticles occurred by a combination of diffusion through the matrix and partial diffusion through water-filled
pores of the PHBV microparticles. A Lactuca sativa test result showed that the genotoxicity of ATZ-loaded PHBV-MP was decreased in relation to ATZ alone. The results demonstrate
a viable biodegradable herbicide release system using atrazine for agrochemical purposes. 相似文献