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牙颈部硬化牙本质粘结的影响因素 被引量:3
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作者 于旸 王如 《现代口腔医学杂志》 CAS CSCD 北大核心 2008年第2期212-214,共3页
关键词 非龋性硬化牙本质 本质粘结 牙颈 龋坏牙本质 本质小管 口腔临床 楔状缺损 病因来源
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Er:YAG激光照射对1步法粘接系统在颈部牙本质的长期粘接效果影响 被引量:2
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作者 何正娣 岛田康史 +3 位作者 田上顺次 胡学娟 陈玲玲 阮双琛 《口腔医学研究》 CAS CSCD 北大核心 2016年第5期490-493,共4页
目的:用微剪切实验测评Er:YAG激光照射对1步法自酸蚀粘接系统在颈部牙本质的长期粘接效果的影响。方法:30颗离体磨牙切割获60片颈部牙本质切片,随机分为对照组(#600沙砾磨砂纸打磨)和激光组(Er:YAG激光照射)。每切片粘接8个树脂柱(Tri-S... 目的:用微剪切实验测评Er:YAG激光照射对1步法自酸蚀粘接系统在颈部牙本质的长期粘接效果的影响。方法:30颗离体磨牙切割获60片颈部牙本质切片,随机分为对照组(#600沙砾磨砂纸打磨)和激光组(Er:YAG激光照射)。每切片粘接8个树脂柱(Tri-S Bond),24h、7d、6月、1年后测微剪切粘接强度,one-way ANOVA和t-test统计分析结果(P=0.05)。走查扫描电镜观察粘接破折面。结果:Er:YAG激光照射牙本质表面呈鳞片状,激光组在6个月和1年后的粘接强度显著下降,低于该组24h和7d后,也低于对照组的结果。结论:Er:YAG激光照射影响了Tri-S Bond在颈部牙本质的长期粘接强度。 展开更多
关键词 ER:YAG 激光 本质 1步法自酸蚀粘接系统 微剪切强度
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不同类型牙本质与全酸蚀和自酸蚀粘接系统粘接强度的比较 被引量:9
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作者 王飒 黄翠 +2 位作者 郑铁丽 张智星 程祥荣 《武汉大学学报(医学版)》 CAS 2005年第5期605-608,共4页
目的:比较不同类型牙本质与全酸蚀和自酸蚀牙本质粘接系统的粘接强度,从而指导临床选择。方法:选择临床常见3种牙本质:正常牙本质(ND)、龋病影响牙本质(CAD)、颈部非龋性硬化牙本质(CSD);两种全酸蚀系统:All-Bond2、Single Bond和两种... 目的:比较不同类型牙本质与全酸蚀和自酸蚀牙本质粘接系统的粘接强度,从而指导临床选择。方法:选择临床常见3种牙本质:正常牙本质(ND)、龋病影响牙本质(CAD)、颈部非龋性硬化牙本质(CSD);两种全酸蚀系统:All-Bond2、Single Bond和两种自酸蚀系统:Fluoro Bond、XenoⅢ,用微拉伸法测试粘接强度。在体视显微镜下观察断裂界面。结果:牙本质类型和粘接系统对粘接强度都有显著影响。不同牙本质上的微拉伸强度有显著差异(P<0.05);SD上全酸蚀和自酸蚀系统的微拉伸强度差异无显著性,XenoⅢ在CAD上的粘接强度较低,CSD中All-Bond2粘接强度较高;体视显微镜下观察断裂多发生在粘接树脂-牙本质界面。结论:不同类型牙本质与全酸蚀和自酸蚀粘接系统粘接强度不同,临床上应根据不同的牙本质类型及实际情况选择合适的粘接系统。 展开更多
关键词 微拉伸 粘接系统 龋病影响牙本质 非龋性硬化牙本质
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铅在红云杉苗木木质部中的迁移
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作者 陈文智 苏凤仙 《国外环境科学技术》 1993年第2期43-46,47,共5页
前言用树木的年轮分析铅污染历史的发展已通过树干木质部中铅的移动来进行。在2年的研究中,我们把红云杉(Picea-rubens Sarg.)的幼苗在一个生长季暴露在铅中,在前一个或下一个生长季与铅隔离。木质部年轮和树皮中的铅含量用原子吸收法... 前言用树木的年轮分析铅污染历史的发展已通过树干木质部中铅的移动来进行。在2年的研究中,我们把红云杉(Picea-rubens Sarg.)的幼苗在一个生长季暴露在铅中,在前一个或下一个生长季与铅隔离。木质部年轮和树皮中的铅含量用原子吸收法分析测出。暴露在铅中的幼苗组织的铅浓度远远高于对照苗木,并发现隔离铅期间形成的木质部组织中铅浓度较高。 展开更多
关键词 红云杉 苗木 本质部 迁移
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三种水生植物营养器官的比较解剖学研究 被引量:16
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作者 初敬华 高晨光 +2 位作者 朱秋广 马秀杰 邢秀芹 《松辽学刊(自然科学版)》 2001年第2期47-49,共3页
通过对三种水生植物营养器官的解剖观察发现这几种植物根的木质部不发达 ;茎中有发达的通气组织或中空 ;叶片薄或线形 ,等面叶 ,叶表皮中含叶绿体 ,2个种栅栏组织退化 .所有这些特征均与其水生环境中的水对植物体有支持力 ,水中缺少氧气 。
关键词 水生植物 营养器官 比较解剖学 本质部 通气组织 栅栏组织 叶绿体
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美国的诺贝尔奖——美国国家科学奖章 被引量:3
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作者 张淡钦 余涛 《中国科技奖励》 2006年第1期68-71,共4页
当今世界,科学领域的发展日新月异,走在科学队伍最前方的美国备受人们关注, 我们不仅关注他们的发明发现,而且更留意并试图研究与观察科学领域出现这种格局的原因以及隐藏在背后的更深层东西。一切本质都流露于表象,解开这个谜可从很多... 当今世界,科学领域的发展日新月异,走在科学队伍最前方的美国备受人们关注, 我们不仅关注他们的发明发现,而且更留意并试图研究与观察科学领域出现这种格局的原因以及隐藏在背后的更深层东西。一切本质都流露于表象,解开这个谜可从很多角度切入。大多数人平时只是依靠不同媒介获取零碎的信息,错综复杂的科学资讯令人在艳羡美国的同时,也难免产生误解与偏见。为了让更多人了解美国的科学世界,洞悉美国在科学作业方面的成功原因,本期我们向大家介绍美国国家科学奖章,它作为美国科学界的最高奖项,被誉为“美国的诺贝尔奖”。我们可以通过了解美国国家科学奖章的基本概况、分析该奖项历史上的获奖者的情况,显露出美国科学界更深层次的东西。 展开更多
关键词 科学 美国 诺贝尔奖 本质部
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果树嫁接后营养调整术
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《山西农业(致富科技版)》 2007年第1期10-10,共1页
1.分步剪除砧木 采用芽腹接和枝腹接的果树苗,当接芽和枝成活时,不能一次性剪断砧木,而是剪取砧木木质部的1/2,再把砧木本质部折断,让韧皮部(皮层)与树体相连。这一方法适合用在嫁接苗的管理上。
关键词 果树苗 嫁接苗 营养调整 砧木 一次性 木质 本质部 韧皮
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Information Interaction Is the Fifth Type of Fundamental Interactions
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作者 Igor Gurevich 《Computer Technology and Application》 2011年第10期813-817,共5页
Information is an integral part of the Universe. By its physical essence information is heterogeneity of matter and energy. Therefore information is inseparably connected with matter and energy. The universal measure ... Information is an integral part of the Universe. By its physical essence information is heterogeneity of matter and energy. Therefore information is inseparably connected with matter and energy. The universal measure of information in physical heterogeneity is the Shannon information entropy. An information approach along with a physical one allows to obtain new, sometimes more general data in relation to data obtained on the ground of physical rules only. The results presented in this paper show the effectiveness of informational approach for studying the interactions in the Universe. The paper shows that, along with the physical interactions the gravitational, electromagnetic, strong, weak interactions exists fifth type of fundamental interactions--information interaction, whose magnitude is not dependent on distance. The existence of information interaction is determined by the entanglement of quantum states, of quantum subsystems. The magnitude of information interaction is measured in bits. 展开更多
关键词 Physical interactions quantum system entangled states information interaction.
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Investor Relations (IR) in Business Communication on the Example of Poland
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作者 Ryszard Kamifiski 《Journal of Modern Accounting and Auditing》 2013年第11期1483-1496,共14页
This paper focuses on investor relations (IR) as an element of companies' communication with the external environment. It shows the place and role of IR in communication with the general market, and the stock excha... This paper focuses on investor relations (IR) as an element of companies' communication with the external environment. It shows the place and role of IR in communication with the general market, and the stock exchange market in particular. The study is illustrated with an example of IR in Poland, a relatively new European Union (EU) member state and an emerging market. As can be seen, IR goes beyond the traditionally understood maintenance of communication with the capital market. It is also shown that the main role of IR ought to be the reduction of investment risk and enhancement of the companies' value, which is of particular significance in light of the current globalization of capital markets. It has been found that Polish companies, especially those listed on the Warsaw Securities Exchange (WSE), commonly rely on IR as a means of communication with the environment. And yet, as the results of the analysis show, the quality of that communication is still far from satisfactory, despite efforts undertaken by various external entities to encourage more focus on the development of IR, or understanding of the company's relevant staff of its important role. 展开更多
关键词 investor relations (IR) public relations (PR) business communication financial reporting STAKEHOLDERS capital market securities exchange/stock exchange information technologies
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Research on Financial Quality Evaluation of Listed Companies on GEM
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作者 BAI Yulin 《International English Education Research》 2017年第4期4-6,共3页
As an important component of the multi-level capital market, the growth enterprise market plays an important role in improving China's capital market. The GEM listed companies in information technology industry as an... As an important component of the multi-level capital market, the growth enterprise market plays an important role in improving China's capital market. The GEM listed companies in information technology industry as an example, from the four aspects of the profit quality of listed companies, asset quality, growth quality, solvency, calculation of 83 listed companies of the weighted rate of return on net assets, net operating rate of 12 financial indicators, and through the SPSS21.0 analysis results of factor analysis, comprehensive evaluation the formation of the information technology industry, the financial quality of the gem, to provide a scientific basis for the decision to GEM listed companies healthy development. 展开更多
关键词 Information technology industry financial quality factor analysis
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Economic Cost-Effectiveness of the Implementation of the Quality Standard ISO 9001 in the Health Sector
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作者 Petkovska Sofija Gjorgjeska Biljana 《Journal of Modern Accounting and Auditing》 2014年第8期912-916,共5页
The quality standard ISO 9001 helps and enables organizations, regardless of the sector where they exist, to implement the quality management properly. Recent years have attracted attention to the possibilities of imp... The quality standard ISO 9001 helps and enables organizations, regardless of the sector where they exist, to implement the quality management properly. Recent years have attracted attention to the possibilities of implementing this standard in the health sector and the economic viability of that long-term investment. Health care organizations are recognizing the value system that combines all the criteria for managing quality, including management of business, compliance and management of procedural steps, and most importantly, the total quality management. In general, the implementation of ISO 9001:2008 standard for quality in health care institutions is seen as an opportunity to improve the quality of health care, and the entire process is to be completed by reducing costs and improving services in the sector. The implementation of a quality standard is directed towards patients, medical staff, and management in order to achieve reduction and complete relief from the pain, correct and professional services, conducted services with an appropriate skilled and professional care to obtain results that are comparable to known standards, and protection services with appropriate insurance policies, and the management expects the implementation of a quality system to justify and return their investments. The methods used in this paper are based on the quality standard ISO 9001:2008--Quality Management System and the Guidelines for Improving Performance, developed based on ISO 9004:2000: Quality Management System-43uidelines for Continuous Improvement. These guidelines contain a big part of the text in ISO 9004:2000, but they are supplemented with specific guidelines for their implementation in the health sector. The implementation of the system and monitoring guidelines evidently contributes to the overall resolution and closure of problems in over 50% of cases. This not only results in saving money for the institution, but it also globally leads to reduced variations in the healing process. Expected benefits from implementing the system in the health care sector in the Republic of Macedonia relate to providing a substantial foundation for obtaining all the necessary facilities and reduction of the costs by reducing the inappropriate staff in exactly determined departments. Implementation of future accreditation processes can be accomplished in a much shorter period of time, especially when there is good communication and cooperation among the departments. Improved working systems, processes, and final results inevitably contribute to happy and healthy patients. 展开更多
关键词 ISO 9001 ISO 9004:2000 guidelines for improvement
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The Applic ation of Internal Quality Audit in ADCOP Project
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作者 Ye Xiaopeng 《China Standardization》 2009年第5期40-46,共7页
Internal quality audits are a key activity in the quality management ofoil projects.Quality management aims at meeting project quality requirements,coordinatingproject progress,assisting in controlling project costs,a... Internal quality audits are a key activity in the quality management ofoil projects.Quality management aims at meeting project quality requirements,coordinatingproject progress,assisting in controlling project costs,and realizing continuousimprovement in project quality management. 展开更多
关键词 APPLICATION internal quality audit ADCOP quality management
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栗透翅蛾的防治 被引量:1
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作者 庄长生 梁宏斌 +1 位作者 孙德新 王志为 《新农业》 2006年第2期25-25,共1页
栗透翅蛾以幼虫为害枝干为主,当日平均气温高于2℃时,越冬幼虫开始出蛰,经过2~5天即开始蛀食为害树皮。被害处呈黄褐色,原蛀道为黑褐色。然后向树皮深处蛀入为害。6月份,大部分幼虫蛀食接近木质部,蛀道接近互相连通。7月份,幼虫为害进... 栗透翅蛾以幼虫为害枝干为主,当日平均气温高于2℃时,越冬幼虫开始出蛰,经过2~5天即开始蛀食为害树皮。被害处呈黄褐色,原蛀道为黑褐色。然后向树皮深处蛀入为害。6月份,大部分幼虫蛀食接近木质部,蛀道接近互相连通。7月份,幼虫为害进入猖獗时期,蛀道达100~150毫米×10~15毫米,树皮组织遭到严重破坏,养分输导受到很大抑制,严重受害树被害状明显可见。10年生以上的栗树,在干高1米以下有虫10条时,树冠一般无明显被害状;有虫30条时,新梢提早停止生长,叶片枯黄早落,部分大枝枯死;如在50头以上时,当年秋季即有整株枯死现象,即使以后不再遭受为害,2~3年内也会死亡。 展开更多
关键词 透翅蛾 防治 越冬幼虫 日平均气温 为害 本质部 树皮 褐色 接近
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