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山东蒙阴金伯利岩中蛇纹石化橄榄石的微组构特征及其地质意义 被引量:1
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作者 张佳伟 杨志军 《矿物岩石地球化学通报》 CAS CSCD 北大核心 2021年第1期155-164,共10页
为探究山东蒙阴金伯利岩中蛇纹石化橄榄石的微组构特征、蚀变环境、元素迁移规律及其对金伯利岩表生演化的指示意义,对该区金伯利岩中部分蛇纹石化的橄榄石和完全蚀变的橄榄石进行了XRD、EPMA和LA-ICP-MS分析测试。结果表明,蛇纹石中少... 为探究山东蒙阴金伯利岩中蛇纹石化橄榄石的微组构特征、蚀变环境、元素迁移规律及其对金伯利岩表生演化的指示意义,对该区金伯利岩中部分蛇纹石化的橄榄石和完全蚀变的橄榄石进行了XRD、EPMA和LA-ICP-MS分析测试。结果表明,蛇纹石中少部分Mg被Fe、Al、Ca、Ni、Mn取代,其中Fe含量仅次于Mg;从蚀变橄榄石的中心到边缘,Li与Zn、Ba与Sc、Co与Y含量分别呈3组变化趋势;部分蚀变的橄榄石为负Eu异常、低氧逸度,推测其形成于封闭的还原环境;完全蚀变的橄榄石无Eu异常,氧逸度相对较高,推测其形成于更开放的偏氧化环境;未完全蚀变的橄榄石大部分微量元素含量都高于完全蚀变橄榄石;稀土元素在蛇纹石化过程中可能存在迁移活动。 展开更多
关键词 蛇纹石化 金伯利岩 橄榄石 表生演化 山东蒙阴
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Effects of Plant Extracts with Antioxidant Activities on Male Mule Ducks' Performance
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作者 Canin Amandine Crinière Mickaêl +1 位作者 Desbordes Pierre Domitile Renaud 《Journal of Life Sciences》 2017年第7期327-332,共6页
Plant extracts with antioxidant activities have effect on male mule ducks performance, and livestock animals have a strong metabolism activity, due to their high production requirements. It can lead to oxidative stres... Plant extracts with antioxidant activities have effect on male mule ducks performance, and livestock animals have a strong metabolism activity, due to their high production requirements. It can lead to oxidative stress disorders; deteriorate growth performance and even their health. The objective of this study was to assess the effect of a mixture of active ingredients of plant extracts, known for their antioxidant and anti-inflammatory properties, on performances of mule ducks, in rearing and force-feeding period. Then 3,200 day-old mule ducks (MMGxPKL) were separated in 2 groups (negative control and treatment = EL) ×4 replicates per group for the rearing period. Each group received the same feeding program. EL group was supplemented, until the force-feeding period, with a mixture of actives from plants incorporated at 0.5% in the complete feed. At 84 days, the live weight and the feed consumption were measured for each treatment. Blood samples were also taken to measure the activity of two antioxidant enzymes: SOD (superoxide dismutase) and GPx (glutathione peroxidase). For force-feeding, the ducks were separated among 3 farmers during 12 days. At slaughter, individual measures of breast and liver were conducted. At 84 days, mean live weight for EL group was improved by 3.7% (p 〈 0.001). Feed conversion ratio was also improved (4.50 versus 4.62). At slaughter, breast weight was higher for EL group (p 〈 0.01). A high variability in the results of the activities of antioxidant enzymes was obtained. A decrease in SOD activity in erythrocytes was observed for the EL group (p 〈 0.05). The results showed that the actives assessed in this study, distributed to ducks during the rearing period, had a beneficial effect on growth performance over that period. The mechanisms of endogenous antioxidant system and inflammatory responses remain to be elucidated. 展开更多
关键词 Oxidative stress POULTRY PERFORMANCES plant extracts antioxidante ANTI-INFLAMMATORY blood
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Utopian Theatre and Subjectivity Reconstruction Rethinking on the Artistic Spirit of Minjian Theatre
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作者 YANG Zi 《Journal of Literature and Art Studies》 2017年第11期1391-1400,共10页
Minjian has become an important concept in recent scholarly research. It is widely used by scholars to indicate specific social and cultural spaces existing beyond the control of state power, therefore, minjian social... Minjian has become an important concept in recent scholarly research. It is widely used by scholars to indicate specific social and cultural spaces existing beyond the control of state power, therefore, minjian social-cultural spaces are more often than not marginal and peripheral. In the field of performing arts, minjian theatre refers to performances produced by private theatre companies as opposed to state-run groups. These private companies or grass-root groups, without the interference of the government, produce artistic expressions that reflect current social reality to a certain extent. For a long time, the study of minjian theatre has been framed as forms of resistance against the ideology propagated by state-run theatres. Based on this paradigm, this paper, through the case analysis of Shanghai minjian theatre companies, attempts to illuminate the production mechanism and developmental process of minjian theatres. In so dong, this paper will explore the aesthetic and social-political values of minjian theatres. 展开更多
关键词 Minjian Theatre Theatrical Practice Utopian Theatre
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TIE algorithm:a layer over clustering-based taxonomy generation for handling evolving data
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作者 Rabia IRFAN Sharifullah KHAN +1 位作者 Kashif RAJPOOT Ali Mustafa QAMAR 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2018年第6期763-782,共20页
Taxonomy is generated to effectively organize and access large volume of data. A taxonomy is a way of representing concepts that exist in data. It needs to continuously evolve to reflect changes in data. Existing auto... Taxonomy is generated to effectively organize and access large volume of data. A taxonomy is a way of representing concepts that exist in data. It needs to continuously evolve to reflect changes in data. Existing automatic taxonomy generation techniques do not handle the evolution of data; therefore, the generated taxonomies do not truly represent the data. The evolution of data can be handled by either regenerating taxonomy from scratch, or allowing taxonomy to incrementally evolve whenever changes occur in the data. The former approach is not economical in terms of time and resources. A taxonomy incremental evolution(TIE) algorithm, as proposed, is a novel attempt to handle the data that evolve in time. It serves as a layer over an existing clustering-based taxonomy generation technique and allows an existing taxonomy to incrementally evolve. The algorithm was evaluated in research articles selected from the computing domain. It was found that the taxonomy using the algorithm that evolved with data needed considerably shorter time, and had better quality per unit time as compared to the taxonomy regenerated from scratch. 展开更多
关键词 TAXONOMY Clustering algorithms Information science Knowledge management Machine learning
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