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8-羟基喹啉插层蒙脱土/丙烯酸酯复合荧光材料的制备
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作者 杨磊 姚其 +1 位作者 袁雪华 郑炳云 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2014年第12期144-148,共5页
为了制备具有良好加工性能和高荧光强度的8-羟基喹啉(8-OQ)类有机光致发光材料,以铝基蒙脱土(MMT)中的Al(Ⅲ)为配位中心、8-OQ为配体合成了高荧光性8-OQ插层MMT(FS-MMT),并将其与环氧丙烯酸酯(EA)复合,采用UV固化法制备了高荧光性FS-MMT... 为了制备具有良好加工性能和高荧光强度的8-羟基喹啉(8-OQ)类有机光致发光材料,以铝基蒙脱土(MMT)中的Al(Ⅲ)为配位中心、8-OQ为配体合成了高荧光性8-OQ插层MMT(FS-MMT),并将其与环氧丙烯酸酯(EA)复合,采用UV固化法制备了高荧光性FS-MMT/EA涂层。采用红外、X射线衍射、紫外-可见光吸收光谱及分子荧光谱仪表征了FSMMT,并研究了FS-MMT/EA涂层的吸收及荧光光谱行为。结果表明,成功制备了FS-MMT,其紫外-可见光吸收光谱分析表明8-OQ与MMT上的Al(Ⅲ)发生配位作用;而荧光强度较Alq3显著增强。而FS-MMT/EA涂层的荧光发射峰出现在490 nm附近,较FS-MMT的发生了蓝移;同时荧光强度随FS-MMT含量增加而增强,且较FS-MMT的有明显升高。 展开更多
关键词 8-羟基喹啉 插层铝基蒙脱土 高荧光性 丙烯酸酯复合材料
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Comparative Study of Photosynthetic and Fluorescence Characters of the Grape under High Temperature and High Light in Turpan 被引量:4
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作者 贾杨 廖康 +4 位作者 马微 江振斌 骆强伟 孙锋 伍国红 《Agricultural Science & Technology》 CAS 2015年第5期868-872,共5页
[Objective] The aim was to explore the photosynthetic characteristics of Turpan grapes under high temperature and strong light conditions. [Method] Using six grape varieties as experimental materials, the photosynthes... [Objective] The aim was to explore the photosynthetic characteristics of Turpan grapes under high temperature and strong light conditions. [Method] Using six grape varieties as experimental materials, the photosynthesis and fluorescence parameters of the grape varieties under high temperature and high light were determined. [Result] The results showed that Thompson Seedless showed strong selfprotection ability on the photosynthetic mechanism in the adversity, and lower photo inhibition on photosynthesis under high temperature and high light than other varieties in which Crimson Seedless was second place. Otherwise the damage on photosynthetic mechanism of Kyoho and Red Globe under the adversity environment is more dipper than the other varieties, and poor self-protection ability. [Conclusion]Thompson Seedless and Crimson Seedless had a strong adaptability for high temperature and strong light. But the adaptability of Kyoho and Red Globe were relatively poor. 展开更多
关键词 Turpan High temperature and high light GRAPE PHOTOSYNTHETIC FLUORESCENCE
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Mesenchymal Stem Cells Express Low Levels of Cardiomyogenic Genes and Show Limited Plasticity towards Cardiomyogenic Phenotype
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作者 Juliana Lott de Carvalho Danilo Roman Campos +4 位作者 Maira Souza Oliveira Jader Santos Cruz Nathalia Martins Breyner Dawidson Assis Gomes Alfredo Miranda de Goes 《Journal of Life Sciences》 2013年第9期950-964,共15页
Mesenchymal stem cell differentiation towards osteogenic, chondrogenic and adipogenic lineages have been extensively described and reproduced in the literature. In contrast, cardiomyogenic differentiation still remain... Mesenchymal stem cell differentiation towards osteogenic, chondrogenic and adipogenic lineages have been extensively described and reproduced in the literature. In contrast, cardiomyogenic differentiation still remains largely controversial. In this study the authors aim to shed new light into this unclear phenomenon and test whether BMMSC (bone marrow mesenchymal stem cells) and ATMSC (adipose tissue derived mesenchymal stem cells) are able to differentiate into functional cardiomyocytes, investigating two differentiation protocols. AT and BMMSC behaved differently when cultured in differentiation media and presented lower levels of proliferation and alkaline phosphatase production, expression of cardiomyocyte-specific transcription factors such as GATA-4, Nkx2-5 and proteins such as ct and 13 Myosin Heavy Chains. Furthermore, MSC started to express higher levels of Connexin-43 and c~ sarcomeric actinin protein. Unfortunately, though, MSC did not present cardiomyocyte-like electrophysiological properties. In order to analyze a possible explanation for such limited plasticity, the authors decided to address the issue using a quantitative approach. Gene expression was quantified by Real time PCR, and, for the first time, the authors show that a possible explanation for limited plasticity of MSC is that even though differentiated cells presented differential gene expression, the levels of key cardiomyogenic genes did not reach expression levels presented by adult cardiomyocytes, nor were maintained along differentiation, reaching peaks at 4 days of stimulation, and decaying thereafter. 展开更多
关键词 Mesenchymal stem cells cardiomyogenic differentiation limited plasticity in vitro differentiation
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High-selective removal of ultra-low level mercury ions from aqueous solution using oligothymonucleic acid functionalized polyethylene film 被引量:3
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作者 YU Yang ZHANG BoWu +4 位作者 YU Ming DENG Bo LI LinFan FAN ChunHai LI JingYe 《Science China Chemistry》 SCIE EI CAS 2012年第10期2202-2208,共7页
We prepare oligothymonucleic acid (OTA) functionalized polyethylene (PE) film and evaluate its selective removal ability of mercury ions at ultra-low levels in aqueous solution. The selective binding of OTA with mercu... We prepare oligothymonucleic acid (OTA) functionalized polyethylene (PE) film and evaluate its selective removal ability of mercury ions at ultra-low levels in aqueous solution. The selective binding of OTA with mercury ions is confirmed by fluorescence in situ hybridization (FISH). The quantitative results via cold-vapor atomic fluorescence spectrometry (CVAFS) indicate that OTA-functionalized PE film is able to remove mercury ions at the sub-ppb level selectively from aqueous solution, even with the coexistence of other metal ions at concentrations 250-fold or higher than that of mercury. 展开更多
关键词 oligothymonucleic acid MERCURY cold-vapor atomic fluorescence spectrometry high-selective removal ultra-low level
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Using the inverse Poisson distribution to calculate multiplicity of infection and viral replication by a high-throughput fluorescent imaging system
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作者 Robert William Figliozzi Feng Chen +1 位作者 Albert Chi Shao-Chung Victor Hsia 《Virologica Sinica》 SCIE CAS CSCD 2016年第2期180-183,共4页
Dear Editor,For virologists,it is crucial to confidently determine the concentration of infectious particles that are utilized and produced in experiments(Dulbecco,1952;Bushar and Sagripanti,1990;La Barre and Lowy,20... Dear Editor,For virologists,it is crucial to confidently determine the concentration of infectious particles that are utilized and produced in experiments(Dulbecco,1952;Bushar and Sagripanti,1990;La Barre and Lowy,2001;Gueret et al.,2002;Gao et al.,2009;Kutner et al.,2009;Grigorov et al.,2011. 展开更多
关键词 multiplicity inverse throughput utilized Poisson replication infectious automatically counterpart scatter
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