淮河蚌埠段鳙鱼体内重金属富集研究

应用火焰型原子吸收光度法测定淮河鳙鱼(Aristichthys nobilis)不同组织器官(鳞片、鳔、心脏、肌肉、鳃盖骨、尾鳍、脑、脾、皮肤、胆、眼球、肠、鳃和肝胰脏)中的Cu、Mn、Cd、Fe、Ni和Zn等6种重金属含量。结果表明,淮河鳙鱼不同组织器官中的Cu、Mn、Cd、Fe、Ni和Zn的含量不同,其中Fe(59.168 mg/kg)和Zn(50.220 mg/kg)含量均明显高于其他重金属含量,鳙鱼心脏中Fe(370.220 mg/kg)和Zn(229.659 mg/kg)含量最高,其次为肠、鳃、肝胰脏;Cu在肝胰脏、心脏和肠中的含量较高(13.254mg/kg、8.874 mg/kg、3.120 mg/kg),其他组织较低;Mn在肠、鳃盖骨、鳃中含量较高,但心脏中含量最少;Cd和Ni在心脏、鳔、鳞片、鳃盖骨中含量较高,在肠中的含量均较低,但淮河鳙鱼不同组织中Cd的含量超过国家卫生食用标准,其食用部分不能食用。     

“The Subjective Necessity”

Abstract

Several recent articles on social work education have advocated for the inclusion of literature in the curriculum. The authors argue that the value of including works of literature in the social work curriculum extends beyond specific content to the reading process itself. They assert that the subjective values inherent in works of literature or film, as opposed to textbooks, can pose a necessary challenge to empirical thinking by exposing students to a diversity of narratives and narrative forms and by introducing ambiguity, critical thinking, and interpretive freedom into the classroom. An argument is made for including literature in a process of learning that is “dialogic” rather than “monologic” and that, by its practice and methodology more than its content, embodies and transmits the professional values of social work.     

论认知语境在英语词义建构和理解中的作用

英语词义的建构和理解,是一个搜寻与认知语境最佳关联的过程,故认知语境在其中起了非常重要的作用。本文就试从关联理论的角度,探讨如何利用认知语境通过语用收缩和语用扩充来构建和理解词汇的意义,并从中得到一些对英语词汇习得和教学的启发。     

大众健美操的运动特性及对人体身心健康的影响

大众健美操是集舞蹈和体操于一体的新兴体育项目,深受大众的喜欢。本文从其健身、健心和健美的特性出发,对参加大众健美操运动在身心各方面所受到的影响进行了分析和探讨。     

复杂类型“汇款错误”所生不当得利的法律规制与救济研究

“汇款错误”之“错误”不属于契约视角下的错误制度,它只能在不当得利制度下获得解释。然而,如果“汇款错误”给第三人造成信赖利益的表象,那么就需要对信赖利益与不当得利加以平衡。通过平衡的视角观察发现,有必要在实体上扩大不当得利债权之相对性效力,从而使“汇款错误”在程序上的权利救济机制也变得更加顺畅。     

非常规饲料玉米柠檬酸渣的开发利用

开发非常规饲料是缓解饲料资源不足、降低畜禽养殖成本、提高畜牧业经济效益的重要途径。玉米柠檬酸渣是柠檬酸生产企业副产品,含有丰富的营养物质,用作畜禽配合饲料原料有着很好的开发前景。文章对玉米柠檬酸渣饲料资源特点、营养特性、在动物生产中应用效果与研究现状、存在问题等进行了详细分析,并提出了开发利用时需要解决的问题。     

纳米MnO2吸附法降低锡酸钠母液中的含砷量

锡酸钠工艺生产过程中,因长期累积,造成母液中含砷量严重富集,致使在母液循环使用中造成产品中含砷量超标。文章采用纳米MnO2对二次结晶后锡酸钠母液进行吸附,降低母液中含砷量,以达到循环使用。重点讨论母液与吸附剂的液固比、温度、时间、OH-浓度等因素对降低母液中含砷量的影响。结果表明,纳米MnO2对降低母液中含砷量取得良好的效果。     

Enriching queries with user preferences in healthcare

Query enrichment is a process of dynamically enhancing a user query based on her preferences and context in order to provide a personalized answer. The central idea is that different users may find different services relevant due to different preferences and contexts. In this paper, we present a preference model that combines user preferences, user context, domain knowledge to enrich the initial user query. We use CP-nets to rank the preferences using implicit and explicit user preferences and domain knowledge. We present some algorithms for preferential matching. We have implemented the proposed model as a prototype. The initial results look promising.     

Self‐perception of gifts and talents among adults in a longitudinal study of academically talented high‐school graduates

Definitions of giftedness and self‐perceptions of abilities were examined among adults who have been participating in a longitudinal study of academically talented students since their high‐school graduation in 1988. For the present study, participants answered open‐ended questions and completed scales measuring adult giftedness and adult self‐perceptions of abilities in 12 different domains. Gender differences in perceptions were examined. When participants were asked if they believed they were gifted in high school and now, more men than women responded affirmatively to both questions. Further, significant gender differences were identified for perceived competencies in four areas: job competence, nurturance, athletic competence, and morality. Implications of the findings and directions for future research are discussed.     

太湖流域安吉县林地养分流失评估

土壤侵蚀造成的营养物质迁移是太湖流域水环境质量下降的主要原因之一。为了全面认识太湖流域上游地区土壤侵蚀对流域水环境的威胁,为当地的林地经营部门的管理提供参考意见,本研究基于2007年的安吉县森林二类调查数据,采用土壤侵蚀模数与养分含量系数法,评估了安吉县林地土壤侵蚀量以及TN、TP、TK和有机质等4种养分流失量。结果表明：安吉县林地年土壤侵蚀量75.13万t,约合558.87t（/km2·a）;因土壤侵蚀每年约有657t全氮、272.95t全磷、7858t全钾和1.51万t有机质的养分流失;从林地类型来看,竹林和经济林是林地土壤侵蚀及养分流失的主体（累计贡献率77%）;而从地貌类型特征来看,90%的土壤侵蚀及养分流失来自丘陵和低山林地,76%的土壤侵蚀及养分流失来自斜坡和陡坡上的林地