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Search Results: 1 - 10 of 503 matches for " 马艳 "
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模糊理论与信息熵在电力设计行业顾客满意度测评中的应用
马艳
计算机系统应用 , 2005,
Abstract: 以顾客为中心,实现顾客满意,是企业发展的关键。本文将采用专家评判法、综合评判法与信息理论的知识对现有的电力设计行业的顾客满意度测评系统进行改进,为企业提供更准确的顾客满意度。
人工栽培北五味子与野生北五味子的质量对比实验
马艳
中国中药杂志 , 1997,
Abstract: 人工栽培北五味子与野生北五味子的质量对比实验马艳(营口市药品检验所营口115000)北五味子系木兰科植物五味子Schisandrachinensis(Turcz.)Bail的干燥成熟果实。主产于吉林、辽宁、黑龙江等地。为满足野生资源不足的问题,我地区盖县药材试验场、盖县张大寨人工栽培了北五味子,已获成功。本文对人工栽培北五味子和野生北五味子做了质量对比实验,为人工栽培北五味子的药用问题提供了科学依据。1实验材料与方法11仪器、样品及试....
大菱鲆源蜂房哈夫尼亚菌群体感应现象及生物被膜调控的研究
马艳
- , 2016, DOI: 10.13982/j.mfst.1673-9078.2016.8.011
Abstract: 本文以腐败大菱鲆中分离得到的一株具有群体感应现象的细菌为研究对象,通过生理生化试验及16S rRNA鉴定其为蜂房哈夫尼亚菌(Hafnia alvei,Ha-01)。利用检测菌株紫色杆菌CV026及根癌农杆菌A136进行平行划线检测其信号分子(N-酰基高丝氨酸内酯,AHLs),并利用平板打孔法研究其分泌AHLs动力学及不同生长阶段生物被膜产生量,同时通过添加外源信号分子研究AHLs与生物被膜形成的关系。结果显示,菌株Ha-01能够产生群体感应现象,在培养过程中信号分子产生量呈现先升高后降低的趋势,且在16时达到最大值;生物被膜产生量与培养时间呈正相关,在72时达到最大值,然后逐渐趋于稳定,且添加外源AHLs标准品能够促进生物被膜的形成。研究证实,菌株Ha-01能够产生群体感应现象且能够调控生物被膜的形成。
One quorum-sensing (QS) strain separated from a spoiled turbot sample was used as the study object and determined as Hafnia alvei (Ha-01) according to physiological and biochemical tests and 16S rRNA analysis. The QS compounds [N-acyl-homoserine lactones (AHLs)] were detected by parallel-streak method using Chromobacterium violaceum CV026 and Agrobacterium tumefaciens A136. Additionally, the plate-diffusion method was used to study the kinetics of AHL secretion and the amount of biofilm produced in different growth phases, and exogenous signaling molecules were added to study the relationship between AHLs and biofilm formation. The results indicated that strain Ha-01 produced QS phenomena, and the number of AHLs produced by Ha-01 during cultivation exhibited a downward trend after the initial increase, reaching the maximum at 16 h. The amount of biofilm formed was positively correlated with incubation time and reached a maximum at 72 h, followed by gradual stabilization. The addition of exogenous AHL strands could promote the production of biofilm. These results indicated that strain Ha-01 was capable of producing QS phenomena and regulating biofilm formation.
维生素C在眼部的抗氧化作用研究进展
The Research on the Antioxidant Effect of Vitamin C in the Eye
 [PDF]

司南, 吴志鸿, 马艳
Hans Journal of Ophthalmology (HJO) , 2013, DOI: 10.12677/HJO.2013.24006
Abstract:
氧化应激是机体内氧自由基的产生超过其清除能力的一种代谢失衡的病理状态[1]年龄老化、超重、紫外线照射、辐射、吸烟、药物及环境污染等内源性、外源性自由基的侵袭都可造成机体的氧化应激。氧化应激损伤也是一系列疾病的共同病理过程之一,眼科疾病也不例外[2]。在正常情况下,眼睛各个组分都存在一定种类、一定含量的抗氧化剂,与氧化应激之间形成动态平衡,保护眼部各组分的正常生理功能。因此,眼部抗氧化剂活性的研究对眼科疾病的诊断及防治非常重要。本文就抗氧化剂维生素C在眼部的抗氧化作用机制进行了较为全面的综述。
Oxidative stress is a pathological state of metabolic imbalance that the generation of oxygen free radicals in body exceeds the elimination. Endogenous and exogenous factors including aging, overweight, ultraviolet light, radia- tion, smoking, drugs and environment pollution can cause the oxidative stress. Oxidative stress is one of a series of common pathological processes in a range of diseases, and it has no exception in ophthalmic disease. Under normal circumstances, a dynamic balance between oxidants and antioxidants in eye exists. Therefore, the research on antioxidant activity of the eye has significant value in diagnosis and prevention of ophthalmic disease. In this paper, we carried out a comprehensive overview about the antioxidant mechanism of antioxidant vitamin C in eye.
江西生态旅游的可持续发展研究
Research on the Sustainable Development of Eco-Tourism in Jiangxi Province
 [PDF]

马艳, 黄国勤
International Journal of Ecology (IJE) , 2014, DOI: 10.12677/IJE.2014.31002
Abstract:
江西发展生态旅游具有重要的环境意义、经济意义和社会意义。江西生态旅游资源十分丰富。近十多年来,江西生态旅游发展取得了显著成效,但同时也存在诸多突出问题,如规划滞后、管理混乱、开发无序、破坏严重和宣传不力等。为实现江西生态旅游的可持续发展,作者提出应采取如下策略:1) 制定严格、科学的景区发展规划;2) 进行生态旅游管理体制、机制的改革与创新,实施多元化旅游管理机制;3) 征收旅游资源使用费,促进江西省生态旅游的可持续发展;4) 突出地域特色,设计旅游产品,开发生态旅游精品;5) 扩大宣传,提高旅游者爱护环境文明旅游的意识。
The development of eco-tourism in Jiangxi has an important environmental, economic and social significance. The eco-tourism resources in Jiangxiare very rich. Over the past decade, the development of eco-tourism in Jiangxi has made remarkable achievements, but there are still many outstanding issues, such as planning is still lagging, the management is confused, the development is disordered, the environment is seriously damaged and the publicity is ineffective. To achieve the sustainable development of eco-tourism in Jiangxi, the authors proposed that the following strategies should be taken: 1) ensure area development planning rigorous and scientific; 2) reform and innovate the system and mechanism in eco-tourism management, implement diversified tourism management unit; 3) levy user fees of tourism resources to promote the sustainable development of eco-tourism in Jiangxi Province; 4) highlight the regional characteristics, design tourism products, develop eco-tourism boutique; 5) expand the publicity and improve the tourists’ awareness of caring for the environment and cultural tourism.
高空间分辨率和高光谱分辨率遥感图像的融合
马艳
红外 , 2003,
Abstract: 1 引言 在遥感成像系统的设计中,空间分辨率和光谱分辨率常常不可兼得,因为高光谱成像系统的光谱带宽很窄,必须用较大的瞬时视场(IFOR)才能收集足够多的光量子以维持可接受的信噪
砂烫马钱子的炮制方法改进
马艳
中国中药杂志 , 2002,
Abstract: 马钱子为马钱科植物马钱StrychnosnuxvomicaL.的干燥成熟种子,具有通络止痛、散结消肿的作用,常用于风湿顽痹、麻木瘫痪、跌打损伤、痈疽肿痛等症。马钱子属毒性药品,在临床中多采用砂烫法来降低其毒性。其传统的炮制方法是将砂置热锅内,用武火加热至灵活状态时,投入大小一致的马钱子,不断翻动,至外皮呈灰褐色、内部鼓起小泡时取出,筛去砂,放凉,除去绒毛。在实际操作过程中,用眼睛来观察砂温是否适合,药物是否炮制到位,这样
固定化假单胞菌降解油烟废气的研究
马艳
环境工程学报 , 2009,
Abstract: 将从受油烟废气污染严重的土壤中分离筛选的具有较强降解油烟能力的假单胞菌利用活性炭为填料吸附固定后制成填料床生物反应器。实验考察了进气浓度、气体流量、气体停留时间、容积负荷等对油烟去除率的影响,初步研究了生物反应器的抗冲击能力。结果表明,活性炭填料对菌体具有良好的吸附能力,当油烟进气浓度小于100mg/L,气体流速小于8L/h,停留时间大于30s,容积负荷为2.6~18.9g油烟废气/(m3·h),生物反应器的降解效率可达到95%以上,且活性炭填料床反应器具有较强的抗冲击能力。
方位维度视觉搜索的影响因素
马艳
心理学报 , 2007,
Abstract: ?duncan等人认为,当目标和干扰子之间差异越大且干扰子彼此之间差异越小时,则目标搜索越快。他们的结论定性地描述了目标搜索斜率(反应时间对呈现项目数的函数)的决定因素。笔者从方位维度刺激关系方面进一步定量探究该问题,并提出决定因素为g(t,d,n)(目标方位和干扰子方位间的函数关系)。实验结果证实目标搜索斜率是由g(t,d,n)值决定,目标搜索斜率随g(t,d,n)值增大而减小,相同g(t,d,n)值条件的目标搜索斜率无显著差异
基于案例分析的私人图书馆运作模式与启示
马艳
情报资料工作 , 2011,
Abstract: ?thearticlefirstlyintroducesfourtypicalprivatelibrariesascases,andthenanalyzesthepersonalizedoperationmodeloftheselibraries,atlastsummarizestheenlightenmentofoperationoftheprivatelibraries.
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