树状大分子PAMAM(1G)-FCD的合成及荧光性能

合成了外围由小分子2-芴醛修饰的树状大分子PAMAM(1G)-FCD,用IR,1H NMR,MALDI-TOF-MS等手段表征了其结构,并对其荧光性能及Sn2+对该性能的影响进行了研究,结果表明,Sn2+能使化合物荧光显著增强.紫外光谱表明,随着PAMAM(1G)-FCD溶液中Sn2+浓度的增加,体系在360 nm处出现了新的吸收峰,表明二者之间存在化学反应.故该树状分子有望作为难得的蓝光区荧光材料及金属-树状大分子杂化材料

退火气氛中痕量氧在反应形成pt硅化物中的作用

利用X-射线衍射,XPS和AES技术深入地研究了退火气氛中氧对Pt硅化物薄膜的固相成分的影响,发现痕量氧引起硅和铂(Pt)的不完全反应.为了形成单相的PtSi膜,在退火过程中防止氧的沾污是非常重要的.中国科学引文数据库(CSCD)008615-61

高炉喷煤高浓度输送新工艺

提出了一种合适高炉喷煤高浓度输送的新工艺，即采用喷粉罐底部流化，上部出料，总管输送，补气调节，炉前分配器分配方案，固气比可达５０￣１００ｋｇ／ｍ＾３（粉／气）。该工艺对高炉大煤量喷吹有重要的实用价值

高炉喷煤高浓度输送新工艺

提出了一种合适高炉喷煤高浓度输送的新工艺，即采用喷粉罐底部流化，上部出料，总管输送，补气调节，炉前分配器分配方案，固气比可达５０￣１００ｋｇ／ｍ＾３（粉／气）。该工艺对高炉大煤量喷吹有重要的实用价值

Effects of temperature on the growth rates and survival rates of Haliotis diversicolor among different populations

在16、20、24和28℃这4个设定的水温下,以杂色鲍(HAlIOTIS dIVErSICOlOr)日本群体、台湾群体、越南群体和“东优1号“为材料,进行为期40 d的养殖试验,对4个杂色鲍群体在不同温度下的壳长日增长率(lgr)和体重日增长率(Wgr)进行比较.结果表明,“东优1号“杂色鲍群体在28℃时的lgr和Wgr值分别达到162.23±15.79μM/d和46.52±6.89 Mg/d,在4个温度下的lgr和Wgr值都优于其他3个群体,台湾群体在较高温度(24和28℃)条件下的lgr和Wgr值要高于日本群体,而日本群体在较低温度(16和20℃)时的值则高于台湾群体.双因素方差分析的结果进一步表明,温度对杂色鲍不同群体的生长率指标具有显著影响.The small abalone,Haliotis diversicolor,is naturally distributed along the coastal waters of East Asia and is a commercially important species cultured along the coast of southern China.The current study genetically characterized four different small abalone populations(Japan,Taiwan,Vietnam,and "Dong You No.1") that were reared at 16,20,24,and 28℃ for 40 days,and the values of length growth rate(LGR) and weight growth rate(WGR) were investigated.The study revealed that the Dong You No.1 and the Vietnam populations had the highest and lowest values of LGR and WGR,respectively.Dong You No.1 reached 162.23±15.79 μm/d for LGR and 46.52±6.89 mg/d for WGR at 28℃.In terms of LGR and WGR,the Taiwan population performed better than the Japan population at higher temperatures(24 and 28℃),while the Japan population performed better than the Taiwan population at lower temperatures(16 and 20℃).The impact of population and temperature on LGR and WGR was investigated by two-way analysis of variance.The current study indicated that the impact of population and temperature on growth were both highly significant(p<0.01),and a significant association(p<0.05) between population and temperature was also found.The results provide useful information for optimal growth conditions for the small abalone industry.国家863计划资助项目(2006AA10A407;2010AA10A401);广东省教育部产学研结合资助项目(2009B090300159);科技部农业科技成果转化资金资助项目(2010GB23600665

进一步指认近质子滴线核~(129)Pm的衰变

20 0 4年曾报道过利用4 0 Ca + 92 Mo融合蒸发反应产生了近质子滴线新核素12 9Pm ,并首次观测到它 (EC + β+)衰变产生的能量为 99keV的γ射线 .为了进一步确认上述指认 ,以下提供了三方面的新证据 :1)在 16 4— 190MeV能量范围内测量了 99keV衰变γ射线的激发函数 ;2 )进行了交叉反应36 Ar + 96 Ru的实验 ,观察到了相同的 99keV衰变γ射线 ;3)用Woods SaxonStrutinsky方法计算了12 9Pm的核势能面 ,其基态自旋宇称被预言为 5 / 2 - ,所以12 9Pm的 (EC + β+)衰变有利于馈送到子核12 9Nd的 5 / 2 - 的低位态 ,这也与前期报道相符

Effect of Cu~(2+) upon the Fluorescent Properties of Dendrimer PAMAM-FCD

联系人简介: 何旭敏, 女, 博士, 教授, 从事金属有机及高分子材料研究. Em ai:l hejin@ xmu. edu. cn[中文文摘]以小分子2-芴醛( FCD)修饰树状大分子聚酰胺氨PAMAM,合成了1~ 3代树状大分子PAMAM-FCD, 用IR,1H NMR 和MALD I-TOF-MS等手段表征了化合物结构, 研究了Cu2+ 浓度对其荧光及紫外性能的影响. 结果表明, Cu2+ 可使其荧光强度和紫外吸收不同程度地增强. 在紫外光谱中, Cu2+ 自身的吸收峰消失, 表明Cu2+ 参与配位.PAMAM-FCD有望成为蓝光区荧光材料及树状大分子-铜杂化材料.[英文文摘]Dendrimer of polyamidoamine PAMAM was modified with 2-fluorenecarboxa ldehyde( FCD ) to form dendrimers PAMAM-FCD of generation one, two and three, respect ively. Structures and propert ies of PAMAM-FCD were character ized by IR, 1H NMR andMALD I-TOF-MS, with special attention being paid to the effect of Cu2+ on the fluorescent and UV spectra of these dendrimers. The resu lts show tha,t even though Cu2 + usually behaves as a fluorescence quencher, it can significantly enhance the fluorescence of these dendrim ers. Furthermore, the absorbance of PAMAM-FCD in the UV spectrum was also found to increase with the add ition of Cu2+ . The disappearance of the absorbance of Cu2+ it self suggest that coordination reaction between Cu2 + and PAMAM-FCD has occurred. These PAMAM-FCD dendr imers are prom ising to be the scarce material to em it blue fluorescence or as a dendrimer copper hybrid material.教育部新世纪优秀人才支持计划项目(批准号:NCET-04-0603);江苏省高校自然科学基础研究面上项目(批准号:07KJD150097)资