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Search Results: 1 - 10 of 82038 matches for " 林思思 "
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单壁碳纳米管修饰电极测定聚碳酸酯塑料中的双酚A
Determination of Bisphenol A in Polycarbonate Plastic Products Using Single-Walled Carbon Nanotubes Modified Glassy Carbon Electrode
 [PDF]

冯志玲, 刘青, 冯施施, 莹莹, 思思, 翁雪香
Advances in Analytical Chemistry (AAC) , 2015, DOI: 10.12677/AAC.2015.54006
Abstract:
用循环伏安法(CV)研究了环境激素双酚A (BPA)在单壁碳纳米管(SWNTs)修饰电极上的电化学行为。实验结果表明,在pH = 8.0的磷酸盐缓冲溶液中,BPA在碳纳米管修饰电极上的电化学行为是受吸附控制的不可逆电化学氧化过程。在优选的实验条件下,峰电流与BPA浓度在0.04~8 μM范围内呈良好的线性关系,其中检测限为23 nM (3倍信噪比)。该方法简单,快速,灵敏,可用于矿泉水瓶等塑料制品中BPA的检测。
Direct electrochemistry of bisphenol A (BPA) at the single-walled carbon nanotubes (SWNTs) modified glassy carbon electrode (GCE) is studied in this paper. The experimental results show that the electrochemical behavior of BPA on carbon nanotubes modified electrode is an irreversible electrochemical oxidation process controlled by adsorption in phosphate buffer solution (pH 8.0). Under the optimised experimental conditions, the proposed biosensor exhibits a wide linear range of 0.04 - 8 μM with a low detection limit of 23 nM. This method is simple, fast and suitable for analysis of BPA in polycarbonate products.
经济收敛的动力机制文献综述
Literature Review on Dynamic Mechanism of the Economic Convergence
 [PDF]

思思
Advances in Social Sciences (ASS) , 2015, DOI: 10.12677/ASS.2015.41004
Abstract:
经济收敛是当今经济学术界争论的热点,任何经济发展层次结构性凸显的国家或地区都离不开对经济收敛机制的不断探索。地域概况错综复杂的中国,经济收敛机制的充分发挥有利于政府宏观政策上的统筹规划和区域间经济协调快速发展,对国家长期的持续稳定健康发展有着特殊的意义。而从地区间发达程度不均的初始点出发,如何发挥经济集聚的扩散效应以实现技术进步,做到先富带动后富,是经济收敛机制前期的关键。人力资本的累积和国际贸易的自由化程度则是经济收敛机制走向长期均衡的最终因素。
Economic convergence is a hot economic debate in the academic community today. The develop-ment of countries and regions with hierarchical structures needs to explore the economic conver-gence mechanism. Facing the complex situation of China, making full use of economic convergence mechanism is beneficial to the government’s macroeconomic policies on the overall planning and the coordination of regional economic. It has a special significance to the sustained and healthy development of nation. From the initial point that regions developed unequally, how to play the diffusion effect of economic agglomeration to realize the technology progress is the key to the be-ginning of economic convergence mechanism. But the liberalization of international trade and the accumulation of human capital are final factors of long-term equilibrium.
?图的哈密尔顿性及其距离谱半径
刘中柱思思杨国强
惠州学院学报 , 2013,
Abstract:
土豆薄片湿敷治疗早产儿脂肪乳外渗效果观察
Observation of Effect of Wet Compress of Potato Flake to Treat Preterm Fants with Fat Emulsion Extravasation
 [PDF]

文翰, 梁英福, 陆少珍, 赖丽婷, 李萍,思思
Medical Diagnosis (MD) , 2015, DOI: 10.12677/MD.2015.53008
Abstract: 目的:探讨土豆薄片湿敷治疗早产儿脂肪乳外渗的效果。方法:对静脉输注脂肪乳发生外渗的46例患儿采用土豆薄片湿敷治疗,观察肿胀消退情况及时间,以硫酸镁湿敷作为对照。结果:46例患儿治愈率为86.96%,有效率为100%,平均治疗时间为3.14 ± 0.99 h,与对照组比较差异有统计学意义(P < 0.05)。结论:土豆薄片湿敷治疗早产儿脂肪乳外渗简单、易行,效果令人满意,值得推广应用。
Objective: To investigate the effects of applying potato fractions for treatment of fat milk exosmosis in preterm fants. Methods: The wet compress of potato flake treatments were performed in 46 cases preterm fants with fat milk exosmosis. The efficacy, as well as regression the times of swell were observed and recorded, respectively. External application of magnesium sulfate was as control group. Results: Among 46 cases, the rate of cure, the rate of effection and the average period of treatment were 100%, 86.96%, 3.14 ± 0.99 h, respectively, and there were significance between the cases and controls (P < 0.05). Conclusion: It is simple, feasible and effective to treat fat emulsion leakage in preterm fants by using potato fractions, and it is worth using widely.
老龄化会影响科技创新吗——基于年龄结构与创新能力的文献分析
姚东旻,李三希,思思
管理评论 , 2015,
Abstract: 本文从实证文献出发,在机制和结果两个方面分析了人口老龄化对于创新的影响。本文发现,从人力资本积累角度分析年龄与创新均得到了大量证据支持,同时专利申请、技术进步以及行业、国家的TFP均存在和年龄结构相关的一致模式。在综合个人与宏观层面的实证性原因与模式之后,我们认为年龄结构与创新能力存在倒U型关系,国家层面的创新能力也与此一致,但国家间的差异也会造成年龄结构对各国TFP的增长趋势的影响有所差异。
小麦根区微生物分解小麦残体产生的化感物质及其生物活性的研究
马瑞霞?,刘秀芬?,袁光,思思
生态学报 , 1996,
Abstract: 取小麦根区土壤微生物于不同ph(5,7,8)条件下,在室内腐解成熟期麦秸。对不同时间提取物做生物活性检验,部分样品进行gc-ms测定。结果表明:酸性提取液对小麦,玉米种子萌发均表现出抑制作用,其强弱与腐解时间有关。第1天的提取物对小麦、玉米根长的抑制作用极显著(p<0.01),第2周的提取物,以ph7时对小麦抑制最强,萌发率为零。第4周提取物ph8(a)对小麦不但无抑制作用,反而有明显的刺激作用。ph5(b)和ph7(b)样品对玉米的根和芽也表现出明显的刺激作用,差异显著性分别为p<0.01和p<o.05。gc-ms鉴定结果表明:抑制作用强的样品中,含有较多的酸,酚,醇和酮类化合物;有一定刺激作用的样品中,不含酸类,含氨及氮杂环化合物。选择若干通过gc-ms鉴定的化合物进行生物活性检验,结果也证明起抑制作用的化感物质主要是酚,酸,醛,酮类化合物;起刺激作用的物质,主要是一些含氮化合物,包括生物碱。
全新世以来江汉平原地形及其环境变化探讨
The Terrain and Climatic Change of Jianghan Plain since Holocene
 [PDF]

思思, 王熊飞
Geographical Science Research (GSER) , 2014, DOI: 10.12677/GSER.2014.34005
Abstract:
本文以江汉平原的钻孔作为研究对象,收集了10个位于江汉平原WE向的钻孔资料。这10个钻孔资料都是前人发表的数据,综合分析这些钻孔数据,绘制出了江汉平原自西向东地层联孔图。通过对钻孔数据的分析,重建了全新世以来江汉平原地形变化和环境变化。结果显示,全新世以来江汉平原的地形和气候变化可以分为三个阶段:在全新世初期(10~7ka BP),江汉平原大部分地区相对平坦,秦市乡潭彩剅村和沔城一带相对比较低洼,这一时期主要受到河流切割作用;全新世大暖期期间(7~3ka BP),由于长江和汉江等河流洪泛沉积发育,洪水携带的沉积物在秦市乡潭彩剅村和沔城一带相对比较低洼的地方快速堆积;约3ka BP时,江汉平原的地形和全新世初期比已经有了很大变化,很多低洼的地方和一些深的凹槽已经基本上被填平,地形起伏变得缓和,此后江汉平原的地形受人类影响越来越大。
Based on the borehole of Jianghan Plain as the research object, the date of 10 boreholes located in the East-West of Jianghan Plain were collected. These data were published by previous studies. Stratigraphic map from west to east of the Jianghan Plain is drawn out through comprehensive analysis of these drilling data. Through the analysis of drilling data, the terrain and climatic change since Holocene have been reconstructed. The research result shows that terrain and climatic changes of Jianghan Plain can be divided into three stages as follows: in 10 - 7 ka BP, most of the regions were relatively flat. Tancaidou village in Qinshi country and Miancheng area were relatively low. This period were mainly formed by river cutting action; during 7 - 3 ka BP because of the Yangtze river and Hanjiang river flood deposit development, the sediment carried by flood accumulate rapidly in relatively low area of Tancaidou village in Qinshi country and Miancheng area; ~3 ka BP many low-lying areas and some deep grooves have basically been filled. Then Jianghan Plain terrain influenced by human is growing.
微囊藻毒素合成酶基因的pcr检测方法
谢数涛,思思,韩博平*,少君,钟秀英,桂花?
热带亚热带植物学报 , 2005, DOI: 10.3969/j.issn.1005-3395.2005.4.007
Abstract: 针对微囊藻毒素合成酶基因簇的核酸序列,筛选特异性引物,探索一种适用于自然水样中微囊藻产毒潜能检测的全细胞pcr方法。经灵敏度测试表明,这种pcr方法的检测下限相当于100cells。该方法不需要提取基因组dna,检测所需水样量少,具有操作简便、快速、成本低、灵敏度高等优点,能应用于水库等饮用水源水体中具有产毒潜能的微囊藻的检测。
玉米耐旱功能标记辅助选择初探
思思
植物遗传资源学报 , 2013,
Abstract: 干旱是影响玉米生产的主要因素之一,培育耐旱品种可以有效地保持其在干旱环境下的产量稳定性。随着生物信息学数据库的不断完善及基因组学技术的发展,耐旱通用QTL(Quantitativetraitlocus)的发掘为分子育种提供了新的机遇和方法。本文在已发掘的耐旱通用QTL基础上,选取相关的18个连锁标记进行开发并且验证在不同种质背景下24份玉米自交系的耐旱性。结果如下:(1)共检测出42个多态性位点等位基因变异,平均多态性信息量0.4245。(2)通过GGT32(GraphicalGenoTypes)图示基因型软件分析SSR位点,得出umc2217、umc2029、phi099、umc1213和phi022这5个连锁标记可用来初步鉴定玉米耐旱性。(3)利用卡方检验,得出phi022和umc2217均达到显著水平,其与耐旱密切相关。因此,这几个连锁标记不仅可被用于相应群体的耐旱分子标记辅助选择,而且为以后的标记辅助选择及抗旱性基因克隆的研究打下基础。
一个对称等式的若干研究
思思
华南师范大学学报(自然科学版) , 2014,
Abstract:
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