43 research outputs found

    对河北省城镇居民贫困线的测算

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    贫困线的确定是正确反映一个国家和地区贫困状况的重要问题,因而得到众多学者的关注,提出了许多测算方法。本文利用扩展的线性支出法对河北省城镇居民的贫困线进行实证分析

    Preparation of potassium diformate by methyl formate and potassium hydroxide

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    联系人:李清彪. 第一作者:詹国武(1986—),男,学士.[中文文摘]本研究采用甲酸甲酯、氢氧化钾、甲酸为原料,一步反应制备二甲酸钾。系统地考察了影响产品收率的主要因素,优化了工艺条件,结果表明,当n(MF)/n(KOH)=1.20,n(HCOOH)/n(KOH)=1.44,反应时间为30min,反应温度为55℃时,二甲酸钾产品收率可达 98.8%。产品经红外光谱分析及成分测定,符合质量标准。[英文文摘]In this study, methyl formate, potassium hydroxide and formic acid were used as raw materials for one-step synthesis of potassium diformate. The main factors affecting the quality and yield of product were investigated. The optimal conditions for reaction were: molar ratio of MF to KOH 1.20:1, molar ratio of HCOOH to KOH 1.44:1, reaction time 30 min and reaction temperature 55℃. The product met the quality standard of potassium diformate after infrared spectrum analysis and composition determination.厦门大学创新性实验计划资助项

    Clinical analysis of perimenopausal women presenting initially with dry eye symptom

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    目的探讨围绝经期妇女的干眼症状与干眼病诊断的相关性。方法分析56例具有干眼症状的围绝经期妇女眼部检查的临床资料,观察主诉为干眼症状患者的干眼病确诊率及其关系。结果56例以干眼症状为主要表现的围绝经期妇女,确诊水液缺乏型干眼17例(30.4%),蒸发过强型干眼12例(21.4%),混合型干眼8例(14.3%);不能诊断干眼病的19例(33.9%),最终诊断为围绝经期综合征。结论围绝经期妇女干眼病确诊率较高(66.1%),但部分干眼症状可以只是围绝经期综合征的精神神经症状的一种表现,临床诊断干眼应慎重。 【英文摘要】 Objective Diagnosis and treatment of dry eye are important for improving living quality.Present paper was to investigate the correlation between dry eye manifestations and diagnosis of dry eye disease in perimenopausal women.MethodsThe clinical data of 56 perimenopausal women presenting initially with dry eye symptoms including ocular symptoms,slit-lamp examination,tear film break-up time,basal and reflex Schirmer test,vital staining(fluorescence and rose bangle),and meibomian gland dysfunction examination ..

    光生物传感技术与癌症易感性的检出

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    介绍了检测肿瘤易感个体的新方法-光生物传感技术。由此可作出细胞癌变的易感个体的预警,并给出针对性的预防措施

    Mercury ion detection reagent and detection method

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    本发明公开了一种汞离子检测试剂及检测方法,该试剂包括纳米溶胶、拉曼活性分子标记的核酸适配体和电荷修饰剂;其检测方法是先合成纳米溶胶,再向适量新鲜纳米溶胶中加入适量适配体,并混合均匀;继续加入适量电荷修饰剂,并混合均匀;然后加入待测样品,孵育1-5分钟.最后取上述纳米溶胶,测试拉曼散射光谱信号,并进行数据处理。本发明基于Hg2+加入致使纳米粒子表面核酸适配体的结构变化,即银溶胶中纳米粒子聚集和信号分子的表面增强拉曼散射信号增强。本发明采用SERS分析技术,对Hg2+检出限在nmol/L水平,对Hg2+浓度的线性响应范围快,同时具有高选择性,适于环境水中痕量Hg2+的快速检测
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