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121.
Wojas S Ruszczyńska A Bulska E Wojciechowski M Antosiewicz DM 《Environmental pollution (Barking, Essex : 1987)》2007,147(3):584-592
Tobacco plants transformed with TaLCT1 were cultured on Knop's medium with modified calcium concentrations (0.01-3 mM) in the presence of Pb(2+), and in soil contaminated by lead. A 4-5 microM Pb(2+) administered in the presence of 1 mM Ca(2+) inhibited the root growth of transgenic plants to much lesser degree than of control plants, whereas in the presence of 3mM Ca(2+) no differences were found between the studied lines. The reduction of Pb(2+) toxicity in the presence of 1 mM Ca(2+) was not accompanied by a change in the lead tissue concentration. However, when Ca(2+) level in the medium was lowered to 0.01 mM, several fold higher root/shoot Pb ratio in transgenic plants was observed, twofold increase in the total amount of metal accumulated, and lower concentration of Pb in the xylem sap. Results suggest the involvement of TaLCT1 in the regulation of Ca-dependent Pb-detoxification, and under conditions of low calcium in lead uptake and distribution. 相似文献
122.
Evci ED Bilgin MD Akgör S Zencirci SG Ergiń F Beşer E 《Environmental monitoring and assessment》2007,134(1-3):471-477
Objectives The purpose of this study was to determine electromagnetic fields, electric fields, humidity, temperature, and illumination
levels in hairdresser salons located in the downtown area of Aydin, Turkey. Also some health problems which could be related
with the occupational factors are evaluated.
Materials and methods The study was carried out in 30 hairdresser salons, all of which had been registered within the past 5 years. Electric and
electromagnetic fields, illumination, temperature and humidity measurements were determined for hairdryers, hood hairdryers
and depilatory heaters in the participating salons. A brief questionnaire about characteristics and the health status of hairdressers
and workplace conditions was prepared and administered to the hairdressers at the salons.
Results The mean electric fields of hairdryers, hood hairdryers and depilatory heaters were determined as 518 ± 74, 1,123 ± 199, and
648 ± 146 in V/m, respectively, at 5 cm from the surface of each device. These appliances generate mean electromagnetic fields
in excess of 0.25 μT at 5 cm: hand-held hairdryers, 5.0 ± 0.7 μT; hood hairdryers, 1.6 ± 0.3 μT; and depilatory heaters 1.9 ± 0.6 μT.
Total average of cumulative electric and electromagnetic fields, measured at a distance of 90 cm from the surface of these
three devices was calculated to be 98.8 V/m and 0.5 μT, in the participating salons.
Conclusions This preliminary study suggests that physical environmental factors in the salons may be contributing to the health problems
of the hairdressers, and the electrical equipments in the workplaces may have cumulative electric and electromagnetic effects. 相似文献
123.
Barbara Rudno-Rudzińska 《International journal of occupational safety and ergonomics》2007,13(4):399-408
The 35.4-km stretch of the A8 motorway, i.e., Wroc?aw's motorway ring-road (WMRR), passes through the north-west part of the city of Wroc?aw and 4 neighbouring districts. Analyses have shown that WMRR will be a source of noise in the environment, which may adversely affect large areas. Normative environmental protection acts mandate taking all the necessary technical and organizational measures to reduce noise generated by the operation of WMRR in order to comply with the acoustic environment quality standards. The paper presents the research methodology adopted for assessing noise impact and designing acoustic barriers, and proposed designs of acoustic barriers which take into account the acoustic requirements, technical limitations, urban development, and architectural conditions. 相似文献
124.
Tadeusz Wszo?ek Maciej K?aczyński 《International journal of occupational safety and ergonomics》2007,13(4):433-440
Impulse sound events are characterised by ultra high pressures and low frequencies. Lower frequency sounds are generally less attenuated over a given distance in the atmosphere than higher frequencies. Thus, impulse sounds can be heard over greater distances and will be more affected by the environment. To calculate a long-term average immission level it is necessary to apply weighting factors like the probability of the occurrence of each weather condition during the relevant time period. This means that when measuring impulse noise at a long distance it is necessary to follow environmental parameters in many points along the way sound travels and also to have a database of sound transfer functions in the long term. The paper analyses the uncertainty of immission measurement results of impulse sound from cladding and destroying explosive materials. The influence of environmental conditions on the way sound travels is the focus of this paper. 相似文献
125.
126.
Sebastian Borowski Jarosław Domański Laurence Weatherley 《Waste management (New York, N.Y.)》2014,34(2):513-521
The anaerobic digestion of municipal sewage sludge (SS) with swine manure (SM) and poultry manure (PM) was undertaken. It was found that a mixture of sewage sludge with a 30% addition of swine manure gave around 400 dm3/kgVS of biogas, whereas the maximal biogas yield from ternary mixture (SS:SM:PM = 70:20:10 by weight) was only 336 dm3/kgVS. An inhibition of methanogenesis by free ammonia was observed in poultry manure experiments. The anaerobic digestion was inefficient in pathogen inactivation as the reduction in the number of E. coli an Enterobacteriaceae was only by one logarithmic unit. A substantial portion of pathogens was also released into the supernatant. 相似文献
127.
128.
Sławomir Jaworski Mateusz Hinzmann Ewa Sawosz Marta Grodzik Marta Kutwin Mateusz Wierzbicki Barbara Strojny Krishna P. Vadalasetty Ludwika Lipińska André Chwalibog 《Environmental science and pollution research international》2017,24(27):21671-21679
With the rapid development of graphene synthesis and functionalization approaches, graphene and its related derivatives have shown great potential in many applications in material science, including biomedical applications. Several in vitro and in vivo studies clearly showed no definitive risks, while others have indicated that graphene might become health hazards. In this study, we explore the biocompatibility of graphene-related materials with chicken embryo red blood cells (RBC). The hemolysis assay was employed to evaluate the in vitro blood compatibility of reduced graphene, graphene oxide, and reduced graphene oxide, because these materials have recently been used for biomedical applications, including injectable graphene-related particles. This study investigated structural damage, ROS production and hemolysis of chicken embryo red blood cells. Different forms of graphene, when incubated with chicken embryo RBC, were harmful to cell structure and induced hemolysis. 相似文献
129.
Jolanta Skowroń Lidia Zapór Katarzyna Miranowicz-Dzierżawska 《International journal of occupational safety and ergonomics》2013,19(1):107-116
The acute-toxic-class method (ATC) is an alternative to the classical LD50 test. Four substances were tested with an ATC testing procedure. The results were compared with LD50 data obtained from the literature. Great importance was attached to the observations of toxic signs following administration. The results of this study have shown that the ATC method allows allocation to toxicity classes in the same manner as on the basis of the classical LD50 tests. The ATC method uses fewer animals and yields the same information on toxic signs. Introducing the ATC method into the quality system allows estimating the acute oral toxicity of chemicals according to the Organisation for Economic Cooperation and Development (OECD; OECD, 1992, 1996). 相似文献
130.
Magdalena Leszczyszyn-Pynka Małgorzata Kłys-Rachwalska Beata Sacharczuk Anna Boroń-Kaczmarska 《International journal of occupational safety and ergonomics》2013,19(4):425-429
We analyzed occupational exposure to potentially infectious body fluids among health care workers (HCWs). Nurses were the most common exposed category of HCWs. In 73.6% cases needle sticks had been the reason of exposure. Recapping a needle was the cause of exposure in 6.9% accidents. Among 189 registered HCWs, 66 (34.9%) performed invasive procedures without any personal protective equipment. Prophylaxis with antiretroviral drugs was necessary in 43 (22.8%) cases.As many as 60.3% of exposure incidents to potentially infectious material result from non-compliance with the relevant recommendations. Continuous education and training is critically needed to prevent occupational exposure to blood-borne infections among health care workers. 相似文献