143 research outputs found

    Research on Luxottica’s Competitive Advantages

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    2017年1月16日,意大利眼镜集团陆逊梯卡以450亿欧元并购法国依视路集团,这一欧洲最大规模的跨境并购交易使得陆逊梯卡集团成为全球最大的眼镜集团。作为眼镜行业龙头,截止到2016年底,陆逊梯卡集团全球拥有12个制造中心,11个全资子品牌,以及20家奢侈品眼镜生产制造授权。集团连续五年规模扩张,销售收入稳步增长。相比于其最大的竞争对手——霞飞诺集团,陆逊梯卡集团无论是市场占有率还是盈利能力都具有明显的优势。分析陆逊梯卡如何利用战略行动产生竞争优势是本文研究的主要问题。 为研究陆逊梯卡集团竞争优势,本文采用企业竞争优势理论、波特五力模型、一体化战略、多品牌战略、价值链管理、全面质量管理等理论,...According to the statistics, the amount of myopia patients has increased to 450 million in China, this amount has been more than 2360 million around the world. The demand of glass around the world is very strong. Besides, the rate and speed of World Luxury Index increased far more than that of the S&P 500. Global glass manufacturer giant Co. Luxottica declared its 46 billion M&A transactional with...学位:工商管理硕士院系专业:管理学院_工商管理硕士(工商管理硕士)学号:1792012115062

    The Study of Recombinant Bovine Enterokinase Properties and Dynamics

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    肠激酶(EK,EC3.4.21.9)是一种在基因工程产品中广泛应用的工具酶,是哺乳动物消化系统中最基础的丝氨酸蛋白水解酶之一,由1条结构亚基(重链)和1条催化亚基(轻链)构成,催化亚基可以特异性识别胰蛋白酶原中Asp-Asp-Asp-Asp-Lys序列并沿序列的羧基端切下,将胰蛋白酶原活化为胰蛋白酶,从而启动各种酶原活化的级联[1]。 本文研究的肠激酶是酵母表达的重组激酶,其轻链接近电泳单一纯,主要是通过催化荧光底物Gly-Asp-Asp-Asp-Asp-Lys-β-naphthylamide(简称GD4K-β-萘胺)水解跟踪法,对该酶制剂的一些活性影响因素进行研究,探讨了该酶的酶学特性、活...Enterokinase(EK,EC 3. 4. 21. 9) is a genetically engineered products in a widely used tool for the enzyme, it is one of the most basic mammalian digestive serine proteases,it was composed of a subunit structure(heavy chain) and a catalytic subunit(light chain), Subunit structure is responsible for the catalytic subunit structure fixed to the intestinal brush border membrane and guide it move to t...学位:理学硕士院系专业:生命科学学院生物化学与生物技术系_生物化学与分子生物学学号:K20052600

    The Application of Lean Six Sigma Framework in Internal Logistics System Improvement

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    本文以生产制造型企业A公司为研究对象,主要围绕A公司内部物流信息系统与精益六西格玛管理模式融合的过程展开研究,即如何合理地应用精益六西格玛的管理模式(DMAIC)来提升企业内部物流信息系统的效率。文章首先对本文的研究背景和意义进行了阐述,并对国内外有关精益六西格玛应用的研究成果进行了综述;之后针对精益生产管理理论和六西格玛管理理论分别展开概述,并探讨二者结合的精益六西格玛的内涵;在此基础上针对A公司的内部物流信息系统的现状展开分析,指出其存在的问题;之后进一步分析了在A公司内部物流信息系统中应用精益六西格玛管理模式的可行性,确定基本的应用原则和目标;然后按照精益六西格玛DMAIC的基本步骤分别...This thesis takes the manufacturing enterprise A company as the object, mainly around the fusion process of internal logistics information system of A company, and Lean Six Sigma management mode research. Firstly, the background and significance of this study are described, and summarizes the domestic and foreign related Lean Six Sigma Application Research; then according to lean production manage...学位:工程硕士院系专业:管理学院_工程硕士(物流工程)学号:X201115300

    Anti-demodecidosis activity and skin safety ofJatropha curcas.1 leaves extract in vitro

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    目的 探讨麻风树叶治疗蠕形螨病的应用价值。方法 用80%乙醇热回流提取法提取麻风树叶提取液。取蠕形螨感染者面部皮脂,分离并鉴定蠕形螨备用。设不同浓度麻风树叶实验组、2%浓度的甲硝唑对照组和生理盐水对照组,进行体外抗螨实验。pH仪测定不同浓度麻风树叶提取物pH值。设麻风树叶实验组和75%乙醇对照组,用健康家兔进行皮肤刺激实验和急性皮肤毒性实验。结果 50、25、12 mg/ml麻风树叶组与2%甲硝唑组毛囊蠕形螨死亡时间分别为(1.55±0.67)min、(1.61±0.67)min、(2.47±0.80)min和(1.20±0.48)min。50、25 mg/ml麻风树叶组以及2%甲硝唑组两两之间差异无统计学意义(P均〉0.05)。50、25、12 mg/ml麻风树叶提取液pH值分别为6.07±0.73、6.27±0.82、6.35±0.83,对家兔完整皮肤及破损皮肤刺激评分均为0,且无明显毒性。结论 麻风树叶提取物具有较强的体外抗蠕形螨活性且具有皮肤安全性。Objective To test the application value of the extract of Jatropha curcas.l leaves in treatment of demodecidosis. Methods Jatropha curcas.1 leaves were extracted with 80% ethanol by using heat reflux method. Facial sebum specimen from demodecidosis-infected patients were used to isolate and identify demodecidosis. Different concentration groups of Jatropha curcas.l leaves, 2% metronidazole control group and physiological saline control group were defined. The anti-demodecidosis experiment was performed in vitro. The pH value of different concentrations of Jatropha curcas.l leaves extract was determined. Skin irritation test and acute skin toxicity test were carried out in healthy rabbits, and Jatropha curcas.1 leaves and 75% ethanol served as experiment and control groups, respectivelyl Results The mite-killing time was (1.55-4-0.67) min with 50 mg/ml Jatropha curcas.l leaves extract, (1.61-4-0.67) min with 25 mg/ml Jatropha curcas.l leaves extract, (2.47-4-0.80) min with 12 mg/ml Jatropha curcas.l leaves extract, and (1.20-4-0.48) min with 2% metronidazole. There was no significant different between 50, 25 mg/ml Jatropha curcas.l leaves extract groups and 2% metronidazole group (P 〉 0.05). The pH value was 6.07+0.73 of 50 mg/ml Jatropha curcas.l leaves extract, 6.27-1-0.82 of 25 mg/ml Jatropha curcas.l leaves extract and 6.35-4-0.83 of 12 mg/ml Jatropha curcas.1 leaves extract. Score for irritation to normal and wounded rabbit skin was both 0, and acute toxicity test showed no significant toxicity. Conclusions Jatropha curcas.l leaves extract shows a remarkable activity to demodecidosis with skin safety in vitro.漳州市自然科学基金(ZZ2014J33

    Association of Dyes Bearing with Opposite Charges and Its Application in the Determination for Micro Amounts of Nucleic Acids

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    [中文文摘]建立了高灵敏荧光分光光度测定DNA 和RNA 的新方法. 方法的线性范围分别为0-04 ~1-20μg/m L( 鲑鱼精子SMDNA 和小牛胸腺CTDNA) , 0-10 ~1-20μg/mL( 酵母RNA) , 检测限分别为17ng/mL(SMDNA) , 24ng/mL(CTDNA) , 98ng/mL(RNA) . 将方法用于实际样品金黄色葡萄球菌中DNA 含量的测定, 结果满意.[英文文摘]It has been found that the fluorescence of tetrasulfonated aluminum phthalocyanine was obviously quenched by cationic dyes,but recovered in the presence of nucleic acid. Based on this phenomenon,a novel method for the determination of nucleic acids was investigated.The method presented is senstive and with simplicity in manipulation.Besides,since a fluorescent dye emitting at long wavelength region is employed,this method has the advantage of effectively reducing the interference from background fluorescence and scattering light.国家自然科学基金(29775021

    3种B族链球菌筛查方法在孕晚期筛查中的应用

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    目的比较3种B族链球菌(GBS)的筛查方法在孕晚期孕妇GBS筛查中的临床应用价值。方法收集2017年9月至12月在厦门市妇幼保健院产科门诊产检的35~37孕周孕妇阴道/直肠拭子样本1 027例,用GBS运送增菌...厦门市第二批青年创新创业人才项目(2015-A-03

    厦门市儿童溺水死亡流行病学调查分析

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    目的了解厦门市儿童溺水死亡(溺死)的流行病学特征及危险因素,探索有效的干预措施。方法采用问卷调查收集溺死儿童资料,用HIErArCHICAl MOdEl法和gEnErAl MOdEl法对危险因素进行筛选分析。结果共收集2001-2009年溺水死亡儿童95例,其中男孩占74.7%,小学生占63.2%,不会游泳者占78.9%;主要发生地在池塘、溪流或沟渠;70.5%发生在夏秋季;80%儿童溺死时无人监管;溺死儿童的父母多数文化程度低,家庭收入偏低;死亡的危险因素为:男孩、4~6年级小学生、父亲在40岁以上和下午。结论应采取有针对性的干预措施,控制危险因素,减少儿童溺死的发生

    计算化学数据与图形在普通化学教学中的运用

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    鉴于近化学类的非化学专业院系较少开设物理化学和结构化学课程,他们接触到的计算化学知识十分有限,通过对普通化学教学过程中适当引用一些计算化学的模拟研究内容,有利于开拓学生的视野,调动学生学习积极性,更新普通化学教学内容,培养大学生的思维能力,从而提高教学质量。厦门大学校级教改项目(201718

    变性剂对重组牛肠激酶活性的影响

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    肠激酶(EK,EC 3.4.21.9)是一种在基因工程产品中广泛应用的工具酶.以小分子荧光物质Gly-Asp-Asp-Asp-Asp-Lys-β-萘胺为底物,采用荧光跟踪法研究了变性剂盐酸胍、硫脲、尿素对重组牛肠激酶(rEK)活力的影响及抑制动力学.结果表明:盐酸胍、硫脲、尿素均对该酶的活性有较强的抑制作用,它们对该酶的半抑制浓度(IC50)分别为0.025,0.080和0.750 mol/L.研究的3种变性剂对该酶的抑制均显示可逆抑制机理;抑制类型也均为竞争性类型,测定它们对酶的抑制常数KI分别为0.015,0.060和0.553 mol/L
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