检索结果-南通市图书馆

Effects of a municipal effluent on the freshwater mussel Elliptio complanata following challenge with Vibrio anguillarum

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2015年第11期27卷 91-99页

作者： Gagne Francois Douville Melanie fortier Marlene Fournier Michel Aquatic Contaminants Research Division Water Science and Technology INRS-Institut Armand-Frappier

The purpose of this study was to examine the cumulative effects of exposure to a pathogenic bacteria and municipal effluent in the freshwater mussel Elliptio complanata. Mussels were exposed to increasing concentrations of an ozone-treated effluent at 15°C for 7 days. A sub-group of mussels was inoculated with Vibrio anguillarum and exposed to the same conditions as *** the exposure period, mussels were collected to assess hemocyte count and viability,immunocompetence（phagocytosis and nitrite production）, oxidative stress/inflammation（cyclooxygenase and lipid peroxidation） and oxygen radical/xenobiotic scavenging activity（metallothioniens, glutathione S-transferase）. The results showed that mussels exposed to municipal effluent had increased hemocyte counts, phagocytosis, nitrites, lipid peroxidation and metallothioneins. In the inoculated mussels, the same responses were observed, in addition to cyclooxygenase and glutathione S-transferase activities. Multivariate analyses revealed that（1）the response pattern changed with effluent concentration, where increased responses observed at low effluent concentrations（〉10%, V/V） were attenuated at higher effluent concentrations,（2）the effluent produced more pronounced changes in lipid peroxidation, metallothionein and hemocyte viability, and（3） the simultaneous presence of V. anguillarum led to more important changes in hemocyte count and viability and nitrite levels. In conclusion, the presence of *** could alter the response of mussels to municipal effluent, which could lead to increased inflammation in mussels.

关键词： Elliptio complanata Immunocompetence Oxidative stress Inflammation Vibrio anguillarum

Immunotoxic potential of aeration lagoon effluents for the treatment of domestic and hospital wastewaters in the freshwater mussel Elliptio complanata

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2012年第5期24卷 781-789页

作者： Francois Gagné Chantale André Marlène fortier Michel Fournier Fluvial Ecosystem Research Environment Canada Montréal Quebec H2Y 2E7 Canada INRS-Institut Armand-Frappier Laval Québec Canada

Municipal wastewaters are major sources of pollution for the aquatic biota. The purpose of this study was to determine the levels of some pharmaceutical products and the immunotoxic potential of a municipal wastewater aeration lagoon for the treatment of the domestic wastewaters of a small town with wastewater inputs from a 400-bed hospital complex. Endemic mussels were collected, caged and placed in the final aeration lagoon and at sites 1 km upstream and 1 km downstream of the effluent outfall in the receiving river for a period of 14 days. The results showed that the final aeration lagoon contained high levels of total coliforms, conductivity and low dissolved oxygen （2.9 mg/L） as well as detectable amounts of trimethoprim, carbamazepine, gemfibrozil, and norfloxacin at concentrations exceeding 50 ng/L. The lagoon effluent was indeed toxic to the mussel specimens, as evidenced by the appearance of mortality after 14 days （10% mortality）, decreased mussel weight-to-shell-length ratio and loss of hemocyte viability. The number of adhering hemocytes, phagocytic activity, total nitrite levels and arachidonic cyclooxygenase activity were significantly higher in mussels placed in the final aeration lagoon. A multivariate analysis also revealed that water pH, conductivity, total coliforms and dissolved oxygen were the endpoints most closely linked with phagocytic activity, the amount of adhering hemocytes and loss of hemocyte viability. In conclusion, exposure of mussels to treated aerated lagoon wastewater is deleterious to freshwater mussels where the immune system is compromised.

关键词： mussels municipal wastewaters immunocompetence inflammation cyclooxygenase activity

In vitro immunotoxicity of untreated and treated urbanwastewaters using various treatment processes to rainbow trout leucocytes

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2013年第7期25卷 1400-1407页

作者： Franois Gagné Marlène fortier Michel Fournier Shirley-Anne Smyth Emerging Methods Aquatic Contaminants Research Division Water Science and Technology Environment Canada105 McGill Street Montral Qubec Canada INRS-Institut Armand-Frappier 531 boul.des Prairies Laval Qubec Canada Effluents and Wastewaters Aquatic Contaminants Research Division Water Science and Technology Environment Canada867 Lakeshore Road BurlingtonOntario Canada

Municipal effluents are known to impede the immune system of aquatic organisms. The purpose of this studywas to examine the immunotoxicity of urbanwastewaters before and after 6 treatment processes from 12 cities toward trout leucocytes. Freshly prepared trout leucocyteswere exposed to increasing concentrations of solid phase （C18） extracts ofwastewaters for24 hr at 15°C. Immunocompetencewasdetermined by following changes in leucocyte viability and the proportion of cells able to ingest at least one （immunoactivity） and at least three （immunoefficiency） fluorescent beads. The influentswere treated by sixdifferent treatment strategies consisting of facultative aerated lagoons, activated sludge, biological aerated filter, biological nutrient removal, chemically-assisted physical treatment and trickling filter/solid contact. Water quality parameters of thewastewaters revealed that the plants effectively removed total suspended solids and reduced the chemical oxygendemand. The results revealed that the effluents＇ immunotoxic propertieswere generally more influenced by the properties of the untreatedwastewaters than by the treatment processes. About half of the incoming influentsdecreased leucocyte viabilitywhile4 treatment plantswere able to reduce toxicity. The influents readily increased phagocytosis activity for 8/12 influentswhile itwasdecreased in4/12 influents. This increasewas abolished for4/12 of the effluents using treatments involving biological and oxidative processes. In conclusion, municipal effluents have the potential to alter the immune system in fish and more researchwill be needed to improve the treatments ofwastewaters to better protect the quality of the aquatic environment.

关键词： municipal effluents fish leucocytes viability phagocytosis

Exercise is...?: A commentary response

在线全文

学校读者我要写书评

暂无评论

Journal of Sport and Health Science 2017年第1期6卷 52-53页

作者： Jennifer Robertson-Wilson Michelle fortier Department of Kinesiology and Physical Education Wilfrid Laurier University School of Human Kinetics University of Ottawa

In the recent issue of Journal of Sport Health and Science,the question of'Is exercise medicine or what?'was *** wish to follow the editors’suggestion to'...stimulate further discussion on the topic'1by offering additional points of consideration to those discussed by Nesti2in'Exercise for health:Serious fun for the whole person?'.We will specifically

关键词： Exercise is A commentary response

Constant-Stress Accelerated Degradation Life Test of an Organic Light-Emitting Diode Display under Violet Light

在线全文

学校读者我要写书评

暂无评论

Engineering（科研） 2016年第2期8卷 45-51页

作者： François-Xavier fortier Sylvain G. Cloutier Department of Electrical Engineering Ecole de Technologie Superieure Montreal Canada

The lifetime of commercial OLED display devices increases, so does the need for an accelerated lifetime testing method. The present work proposes a simple and accurate blackbox testing approach for commercial PMOLED display lifetime assessment using violet light-induced accelerated aging. Maximum likelihood estimations using lognormal distributions are performed based on datasets acquired from samples exposed to six different degrees of violet irradiance and accelerated life model is shown to accurately fit experimental data using an inverse power law. Based on these results, weighted average of the logarithmic standard deviation, the average life and median life can then be obtained for specific conditions of operation of the devices. As this method relies exclusively on violet light-induced degradation at room-temperature, this minimally-invasive testing procedure requires no significant modification to the display hardware architecture.

关键词： PMOLED Displays Tests and Measurements Lifetime Light-Induced Aging Accelerated Degradation Testing

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

美国人眼中的中国5.8枪族

世界航空航天博览（B版） 2005年第12期11卷 32-37页

作者： David fortier

作为冷战时代成长起来的一代．我们很难想象俄国人已经不是我们的最大敌人了，随着时光流逝．有关苏联的记忆已经慢慢淡逝了．现在俄罗斯成了我们的朋友．作为一个轻武器大国．俄罗斯拥有才华横溢的设计师和数十年积累的丰富经验。在了... 详细信息

作为冷战时代成长起来的一代．我们很难想象俄国人已经不是我们的最大敌人了，随着时光流逝．有关苏联的记忆已经慢慢淡逝了．现在俄罗斯成了我们的朋友．作为一个轻武器大国．俄罗斯拥有才华横溢的设计师和数十年积累的丰富经验。在了解了大量原苏联／俄罗斯轻武器发展的状况的同时．我们必须关注另一个国家一中国。由于现在公开的中国轻武器资料信息实在是太少了，所以我决定去为大家揭开这个神秘国家轻武器研究的面纱。

关键词：中国枪族人眼美国俄罗斯武器发展武器研究轻武器原苏联俄国人

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

哥白尼，陨石坑之王

英语沙龙（高中） 2014年第12期 56-56,64页

作者： Edmund A. fortier 尚宾

地球上最有名的撞击坑是陨石坑，大约一公里宽，550英尺深。为了能看到它，你得驱车远赴亚利桑那州的沙漠地带。月亮上的陨石坑以哥白尼陨石坑冠名，直径达58英里，高度超过两英里。要想目睹它的风采，你只需迈步户外，透过双筒望远镜... 详细信息

地球上最有名的撞击坑是陨石坑，大约一公里宽，550英尺深。为了能看到它，你得驱车远赴亚利桑那州的沙漠地带。月亮上的陨石坑以哥白尼陨石坑冠名，直径达58英里，高度超过两英里。要想目睹它的风采，你只需迈步户外，透过双筒望远镜观看月亮。你或许已注意到，月球表面是一个由明亮区域和灰色区域组成的混合区域。灰色区域是熔岩平原。

关键词：哥白尼陨石灰色区域亚利桑那州双筒望远镜月亮沙漠月球