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平阳霉素诱发人精子染色体畸变——评价化学物质致断性的一种离体测试系统 被引量:17
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作者 黄天华 漆著 +2 位作者 李丹 崔晓 罗自强 《遗传》 CAS CSCD 北大核心 1991年第6期24-26,共3页
人精子经已知的致断剂平阳霉素处理后与去透明带地鼠卵受精,继而制备人精子染色体进行核型分析。平阳霉素20μg、40μg、60μg/ml各剂量组均诱发出了多种类型的染色体结构畸变;其畸变精子率依次为39%、44%、52.4%,其断裂均数依次为1... 人精子经已知的致断剂平阳霉素处理后与去透明带地鼠卵受精,继而制备人精子染色体进行核型分析。平阳霉素20μg、40μg、60μg/ml各剂量组均诱发出了多种类型的染色体结构畸变;其畸变精子率依次为39%、44%、52.4%,其断裂均数依次为1.90、2.70、3.86,与对照组的畸变精子率4%和断裂均数0.07分别进行比较,差异非常显著(P<0.01)并存在明显的剂量依赖关系。本研究为检测化学物质对人精子中染色体的致断作用提供了一种新的离体测试系统。 展开更多
关键词 人精子染色体 离体测试 致断性
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CHARACTERIZATION OF PATHOGENIC FUNGI GENOMES USING PULSED FIELD GEL ELECTROPHORESIS 被引量:1
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作者 吴绍熙 郭宁如 +1 位作者 殷正男 柴建华 《Chinese Medical Sciences Journal》 CAS CSCD 1996年第3期188-190,共3页
Pulsed field gel electrophoresis(PFGE) has been firstly introduced in characterization of the pathogenic fungi Penicillium marne f fei and Exophiala dermatitidis genomes.The numbers and sizes of their chromosomes have... Pulsed field gel electrophoresis(PFGE) has been firstly introduced in characterization of the pathogenic fungi Penicillium marne f fei and Exophiala dermatitidis genomes.The numbers and sizes of their chromosomes have been detected.Polymorphism was identified on the smallest chromosome of E.dermatitidis.The result shows that PFGE for characterization of large molecular DNA pathogenic fungi is very suitable,it is more simple and more efficacy.The result also shows the diversity of pathogenic fungi is relative common even in rare occurred pathogenic fungi such as E.dermatitidis. 展开更多
关键词 pulsed field gel electrophoresis Penicillium marneffei Exophiala dermatitidis
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The Lattices of Congruences on Regular Semigroups with Q-Inverse Transversals
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作者 SHANG Yu WANG Li Min 《Journal of Mathematical Research and Exposition》 CSCD 2009年第3期454-462,共9页
In this paper,a complete congruence on the congruence lattice of regular semigroups with Q-inverse transversals is analysed.The classes of this complete congruence which are intervals are discussed and their least and... In this paper,a complete congruence on the congruence lattice of regular semigroups with Q-inverse transversals is analysed.The classes of this complete congruence which are intervals are discussed and their least and greatest elements are presented clearly. 展开更多
关键词 Q-inverse transversal CONGRUENCE congruence pairs congruence lattices congruence relations on the congruence lattice
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An approach to quality assessment for web service selection based on the analytic hierarchy process for cases of incomplete information 被引量:2
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作者 GAO Cong MA JianFeng +1 位作者 LIU ZhiQuan MA XinDi 《Science China Chemistry》 SCIE EI CAS CSCD 2015年第12期71-84,共14页
Since web services intended for the same application environment tend to be functionally homogeneous, researchers have turned to their non-functional aspects in order to constructively compare web services and choose ... Since web services intended for the same application environment tend to be functionally homogeneous, researchers have turned to their non-functional aspects in order to constructively compare web services and choose an appropriate one. In general, quality of service is very important to users. Many schemes that consider quality assessment have been proposed for web service selection. With the increasing number of qualityrelated attributes, an effective quality assessment method needs satisfactory scalability. Schemes based on the analytic hierarchy process(AHP) meet this requirement. However, prevalent methods in this vein overlook the fact that the traditional AHP needs a complete judgment matrix. In practice, all the information needed to construct a judgment matrix is often unavailable for a variety of reasons, due to which certain judgments cannot be made. In this paper, for an incomplete judgment matrix, we propose an improved AHP approach to consistency verification and the subsequent ordering. Our method can deal with situations where information is insufficient,and inherits all the merits of the traditional AHP approach. A case study establishes the effectiveness of our proposed method. 展开更多
关键词 incomplete information quality assessment analytic hierarchy process (AHP) web services qual-ity of service SELECTION
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A skin-like stretchable colorimetric temperature sensor
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作者 Yingzhi Chen Yin Xi +5 位作者 Yujie Ke Wenhao Li Yi Long Jingyuan Li Lu-Ning Wang Xiaohong Zhang 《Science China Materials》 SCIE EI CSCD 2018年第7期969-976,共8页
Wearable and stretchable physical sensors that can conformally contact on the surface of organs or skin provide a new opportunity for human-activity monitoring and personal healthcare. Particularly, various attempts h... Wearable and stretchable physical sensors that can conformally contact on the surface of organs or skin provide a new opportunity for human-activity monitoring and personal healthcare. Particularly, various attempts have been made in exploiting wearable and conformal sensors for ther- mal characterization of human skin. In this respect, skin- mounted thermochromic films show great capabilities in body temperature sensing. Thermochromic temperature sensors are attractive because of their easy signal analysis and optical recording, such as color transition and fluorescence emission change upon thermal stimuli. Here, desirable mechanical properties that match epidermis are obtained by physical crosslinking of polydiacetylene (PDA) and transparent elas- tomeric polydimethylsiloxane (PDMS) networks. The result- ing PDA fdm displayed thermochromic and thermo- fluorescent transition temperature in the range of 25-85℃, with stretchability up to 300% and a skin-like Young's mod- ulus of -230 kPa. This easy signal-handling provides excellent references for further design of convenient noninvasive sen- sing systems. 展开更多
关键词 STRETCHABLE skin-like THERMOCHROMIC thermo-fluorescent temperature sensor
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