135 research outputs found

    Preparation of Protein-Array with High-activity in the Bonded Microfluidic Chip

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    近年来,微流控芯片具有多功能集成、处理速度快、消耗试剂少和可高通量同时处理多个样品等优点,因而在化学、生物、临床、环境及公共安全的广泛领域得到应用。同时,生物分子微阵列技术也因为可以高通量和高参数地分析生物、药物或临床样品而获得大量应用。两者的结合,即蛋白质阵列微流控芯片,可同时具有两种技术的优势,既可处理复杂的生物或医学体系,又可高选择高参数地分析生物医学样品,成为新的生物或医学的高效研究工具平台。本论文围绕具蛋白质阵列的不可逆封合微流控芯片制作方法进行研究,重点探索高精度蛋白质阵列制作方法、制作过程蛋白质活性保持等关键技术,具体研 究内容如下: 1.探索和优化了玻璃表面修饰和聚乙烯醇(...Recently, microfluidic chips have been found widely spread application prospect in many fields including chemical, biological, clinical, environmental and public security areas. There are many merits in this analysis system of multifunctional integration, processing speed quickly, consuming less reagents and high throughput. At the same time, microarray technology has also acquired a large appli...学位:理学硕士院系专业:化学化工学院化学系_物理化学(含化学物理)学号:2052008115170

    Study on Legal Issues of Sound Mark

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    近年来,随着国际商标法对声音商标的认可,许多国家和地区纷纷加入到对声音商标进行立法保护的行列。国内外企业在认识到声音商标所蕴含的巨大经济价值后,亦逐渐开始了对声音商标的重视和保护。目前,国外已出现了一系列关于声音商标法律保护的实践和探索,声音商标在强化公众对商品或者服务来源识别性方面的作用由此可见一斑。我国现行《商标法》尚未认可对声音商标的法律保护,但从上个世纪末太阳神诉可口可乐案到如今成都的“徐酱油”,都凸显出声音商标保护的现实需要渴望得到立法的回应。 2011年9月2日,国务院法制办向全国公众发布《中华人民共和国商标法(修订草案征求意见稿)》,拟将声音作为注册商标的构成要素之一纳入保护范...In recent years, with the approval of international trademark law of sound mark, many countries and regions have joined the ranks of legal protection of sound mark. Domestic and foreign enterprises also realize that sound marks contain a huge amount of economic value, thereby gradually beginning to pay attention to and protect sound marks. Currently, a series of practice and exploration on legal p...学位:法学硕士院系专业:法学院_经济法学学号:1362010115018

    微生物吸附贵金属的研究与应用

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    概述了微生物吸附回收金、银、铂、钯等贵金属的研究进展 ,微生物吸附贵金属的机理 ,生物吸附技术在贵金属回收等方面的应用及前景。国家自然科学基金资助项目 (No 2 974 30 0 1 ,2 9876 0 2 6 )~

    Chemical preventive effect of matrine on ethyl nitrate nitroguanidine nitrate induced gastric cancer in rats

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    目的探讨苦参碱对乙基硝基亚硝基胍诱导大鼠胃癌的化学预防作用。方法选取雄性WISTAr大鼠100只,随机分成4组,分别饮用不同的药物。其中阴性对照组(A组)25只,自由饮用纯净水;胃癌模型组(b组)25只,予以乙基硝基亚硝基胍(Enng)1.5 Mg/(只·d);实验组(C组)胃癌模型大鼠25只,予以注射用苦参碱150 Mg/(kg·d)和乙基硝基亚硝基胍1.5 Mg/(只·d);对照组(d组)阴性大鼠25只,予注射用苦参碱150 Mg/(kg·d)。饲养24周后处死大鼠,肉眼和显微镜下观察各组大鼠胃黏膜改变情况,并检测胃组织增殖细胞核抗原(PCnA)、血清转化生长因子β1(Tgf-β1)和b细胞淋巴瘤/白血病-2(bCl-2)水平。结果 b组大鼠胃黏膜癌变率64.00%(16/25)明显高于C组胃黏膜癌变率12.00%(3/25),差异有统计学意义(P<0.05);C组大鼠PCnA、Tgf-β1和bCl-2水平明显低于b组,差异有统计学意义(P<0.05);饲养24周后b组大鼠胃黏膜萎缩、异型增生等改变率明显高于C组,差异有统计学意义(P<0.05);饲养24周后,A、d 2组大鼠胃黏膜均未发生癌变,胃黏膜萎缩、异型增生等改变无明显差异,差异无统计学意义。结论苦参碱能够通过降低PCnA、Tgf-β1和bCl-2水平抑制Enng诱导大鼠胃癌发生,为苦参碱对人类胃癌潜在的化学预防作用提供了理论基础。Objective To investigate the chemical preventive effect of matrine on ethyl nitrate nitroguanidine nitrate induced gastric cancer in rats.Methods 100 male Wistar rats were selected and randomly divided into four groups,each had 25 rats,treated with different drugs respectively.Rats in the negative control group( group A) freely drunk water; each rat in gastric carcer model group( group B) drunk ethyl nitrate nitroguanidine nitrate( ENNG) 1.5 mg/d by themselves; gastric cancer model rats of experimental group( group C) drunk matrine 150 mg/( kg·d) ethyl nitrate nitroguanidine nitrate( ENNG) 150 mg /( kg·d) by themselves; negative control group( group D) rats drunk matrine for injection 150 mg /( kg·d) by themselves.Rats were killed after 24 weeks,rats were observed on gastric mucosa change by naked eye and microscope,and detected proliferating cell nucleus antigen( PCNA) of stomach tissue,levels of serum transforming growth factor β1( TGF-β1) and B cell lymphoma/leukemia-2( Bcl-2).Results Canceration rate [64.00%( 16 /25) ]of the rat gastric mucosa in Group B was significantly higher than that in group C [12.00%( 3 /25) ],and the difference was statistically significant( P < 0.05); PCNA,TGF-β1and the Bcl-2 level of rats in group C was lower than those in group B,and the difference was statistically significant( P < 0.05); after raising 24 weeks,change rate of gastric mucosa atrophy and hyperplasia in group B were significantly higher than those of group C,and the difference was statistically significant( P < 0.05); after raising 24 weeks,there was no cancerous changes on gastric mucosa in group A and D,and the change of gastric mucosa atrophy and hyperplasia had no obvious difference,there was no statistically significant difference.Conclusion Matrine could inhibit rat gastric cancer induced by ENNG by lowering PCNA,TGF-β1and the Bcl-2levels,which provides evidence for the potential chemical preventive effect on human gastric cancer.国家自然科学基金(81172284); 厦门市重大科技项目(3502Z20100006

    大学城的功能与模式

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    大学城是以大学为主体, 主要由企业投资, 政府协调、指导, 采取市场化运作、产业 化经营、社会化服务模式的一种组织形式, 是高等教育与社会经济协同发展的枢纽。大学城将 是高等学校成为经济社会中心的重要基地

    医学生职业精神现状分析及建议——以温州医科大学为例

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    运用问卷调查法探究医学生职业精神现状。以温州医科大学782名学生为样本,发放关于医学生职业精神现状和培育模式的调查问卷,运用SPSS 19.0统计软件对数据进行分析,了解医学生职业精神现状并提出建议。2016年浙江省大学生科技创新活动计划暨新苗人才计划项目(2016R413054

    一种叶片裂纹检测的稀疏共振解调算法

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    针对强相干噪声干扰下叶片振动信号中裂纹故障微弱特征的提取问题,提出了一种基于稀疏共振解调的诊断方法。首先,利用从中心集化多分辨分析处理机组上取得的原始振动信号进行子空间重构;其次,对小波子空间信号进行希尔伯特包络解调,选取故障特征频率及其倍频成分能量占优的子空间;再次,根据周期性故障稀疏模型,采用梳形滤波器分离故障特征频率及其倍频成分,构造故障分量参考信号;最后,结合故障参考信号对子空间重构信号进行小波降噪,从而提取与叶片裂纹相关的微弱特征。在出现叶片裂纹故障的发电机组增压风机故障诊断案例分析中,仅采用多尺度分解无法在时域上得到周期性冲击故障特征。而采用所提出的基于稀疏共振解调方法进行信号处理后,强相干噪声得到了有效抑制,从而突出了故障特征。国家自然科学基金(51805398)陕西省自然科学基础研究计划(2018JQ5106)北京卫星环境工程研究所2019年度CAST-BISEE创新基金(CAST-BISEE2019-043

    一种叶片裂纹检测的稀疏共振解调算法

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    针对强相干噪声干扰下叶片振动信号中裂纹故障微弱特征的提取问题,提出了一种基于稀疏共振解调的诊断方法。首先,利用中心集化多分辨分析处理机组上取得的原始振动信号进行子空间重构;其次,对小波子空间信号进行希尔伯特包络解调,选取故障特征频率及其倍频成分能量占优的子空间;再次,根据周期性故障稀疏模型,采用梳形滤波器分离故障特征频率及其倍频成分构造故障分量参考信号;最后,结合故障参考信号对子空间重构信号进行小波降噪,从而提取叶片裂纹相关的微弱特征。在出现叶片裂纹故障的发电机组增压风机故障诊断案例分析中,仅采用多尺度分解无法在时域上得到周期性冲击故障特征。而采用所提出的基于稀疏共振解调方法进行信号处理后,强相干噪声得到了有效抑制,从而突出了故障特征。国家自然科学基金(51805398)陕西省自然科学基础研究计划(2018JQ5106)北京卫星环境工程研究所2019年度CAST-BISEE创新基金资助项目(CAST-BISEE2019-043

    分子振动光谱及其在化学上的应用

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    1.分子振动光谱及其技术1.1分子振动光谱在电磁波谱中的位置众所周知,分子始终不停地运动,近似地说,其运动可分为四类,即分子整体的平动和转动,分子中各原子之间的振动及分子内电子的运动等,这些运动都反映一定的能态或能级

    Electrochemical Nanofabrication Using Polyacrylamide Hydrogel as Soft Stamps

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    电化学刻蚀使用腐蚀性小的电解质溶液,且溶液可使用周期长,是一种环境友好的加工工艺.本文采用聚丙烯酰胺水凝胶(PAg)作为软印章,辅以优化工艺,将电化学湿印章技术(E-WETS)的加工精度从几十微米提高到了200纳米.将新配制的聚丙烯酰胺水凝胶浇注在具有纳米结构的软模板表面,固化后脱模并保存于0.2MOl·l-1kCl溶液中,在合适电位和压力下,对硅片表面金膜进行电化学湿法刻蚀,分别研究了聚丙烯酰胺水凝胶的聚合条件、电化学加工电位以及水凝胶表面压力对加工结果的影响.实验表明,在最优条件下可加工出直径为200纳米的特征点阵结构,且该方法具有较好的可靠性和稳定性。The fabrication resolution of electrochemical wet stamping was enhanced to several hundred nanometers from several ten micrometers by using polycarylamide gel(PAG) as soft stamps and through optimized processes.The PAG stamp was cured on a nanopatterned soft mold and soaked with 0.2 mol.L-1 KCl solution,then contacted with a silicon wafer with gold film and applied with electric field.And the gold nanopatterns were achieved by the selective anodic dissolving,the diameter of fabricated gold spot was around 200 nm.The parameters which affected the fabrication processes have been discussed in detail.supportedbyNationalScienceFoundationofChina(No.91123002); InnovationMethodFundofChina(No.2010IM040100); NationalInstrumentationProgram(No.2011YQ030124
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