Exciton-Phonon Coupling of NN_3 Center in Heavily Nitrogen Doped GaP

通过光致发光谱研究了在 1 9～ 4 8K范围内掺氮浓度为 0 .1 2 %时的 Ga PN的 NN3束缚激子与声子的耦合 .直接计算了 NN3束缚激子的 L O,TO和 TA声子伴线的黄昆因子 S,除了 L O声子外 ,得到了 TO和 TA声子伴线的S因子在该温度范围内对温度的依赖关系 .计算表明 ,NN3的 L O,TO和 TA声子的 S因子均与温度无关 ,说明NN3的 L O,TO和 TA声子伴线与它们的零声子线具有相同的温度依赖关系 ,符合黄昆的多声子光跃迁理论Under heavy nitrogen doping,due to the “concentration quenching” effect,the full spectrum of the NN 3 center is revealed without the interference from the spectra of other higher energy centers.This investigation offers a direct proof for that all the phonon replicas are the phonon sidebands governed by the Huang Rhys’ multiphonon optical transition theory.国家自然科学基金 (批准号 :60 2 760 0 2 );; 厦门大学预研基金 (批准号 :Y0 70 0 5 )资助项目~

Evaluation on difference of therapeutic efficacy of Jiawei Xiaoyao Granules and Pills in treatment of emotional disorder during perimenopause based on Greene Climacteric Scale

目的:在前期加味逍遥丸治疗围绝经期情绪障碍具有比较优势的基础上,基于grEEnE量表探讨其颗粒剂和丸剂不同剂型间疗效差异。方法:经筛选后患有情绪障碍的围绝经期女性75例随机等分为A、b、C3组,分别对应采用帕罗西汀、加味逍遥丸和加味逍遥颗粒剂治疗8周。所有患者在治疗前后各进行1次grEEnE及其子因子评定,并在观察期结束时进行TESS评定。结果:grEEnE总分差及其焦虑、抑郁因子分差:3种治疗方法均能改善,且相互间无显著差异;grEEnE性因子和血管因子分差:后二组均优于A组(P<0.01);TESS评分:与A组比较,b、C组均有统计学意义(P<0.01),评分均小于A组,且后二组间无显著差异。结论:加味逍遥的2种剂型间疗效无显著差异,考虑到帕罗西汀的不良反应,治疗该病加味逍遥的2种剂型都值得推荐。Objective: To investigate the difference in therapeutic efficacy between Jiawei Xiaoyao Granules and pills based on the preliminary research of treating emotional disorder during perimenopause with Jiawei Xiaoyao Pills and Greene Climacteric Scale.Methods: 75 female patients with emotional disorder during perimenopause were slected and randomly divided into 3 groups as group A, B and C.Patients in the 3 groups were treated with paroxetine, Jiawei Xiaoyao Pills and Jiawei Xiaoyao Granules respectively for 8 weeks.Greene and Greene factors assessment were carried out in all the patients before and after treatment, and the TESS assessment was carried out at the end of the observation period.Results: The three therapies all could improve the gap in total score of Greene and its factors as anxiety and depressed, and the difference among these three groups was no significant.The factors of Greene and gap in score of vascular factors of group B and C was better than that of group A(P<0.01).The difference in TESS score between group A and group B and C was significant(P<0.01), while the difference between group B and group C was not significant.Conclusion: The difference in curative effect between the two formulations was not significant.Because of the adverse reactions of paroxetine, in the treatment of emotional disorder during perimenopause, the two formulations of Jiawei Xiaoyao Powder were worth to be recommended.国家自然科学青年基金项目(No.81302960)~

Preparation and Evaluation of Fe-La Composite Oxide Nanoadsorbent for As(Ⅲ) Removal from Aqueous Solutions

本研究采用共沉淀法制备了一种新型铁镧复合氧化物吸附剂(Fe-La),并对其表面特性及As(Ⅲ)吸附行为进行了系统研究.扫描电镜(SEM)和透射电镜(TEM)结果表明,铁镧复合氧化物具有纳米结构,初级粒子粒径范围为20~200 nm.X-射线衍射仪(XRD)表征结果表明,铁镧复合氧化物具有类似氢氧化镧的晶型结构.N_2吸附BET法结果表明,铁镧复合氧化物的比表面积为99.3 m~2·g~(-1).盐加入法测得吸附剂的等电点为7.8.As(Ⅲ)吸附实验结果分析表明,铁镧复合氧化物对As(Ⅲ)具有良好的吸附效果,最大吸附量(pH 7.0)为58.2 mg·g~(-1),Langmuir吸附等温线可较好地拟合铁镧复合氧化物对溶液中As(Ⅲ)的吸附(R~2=0.95);吸附速率较快,240 min内可完成吸附容量的80%,Elovich模型能较好地描述吸附过程(R~2=0.97);溶液pH对铁镧复合氧化物吸附As(Ⅲ)的影响较为明显;共存阴离子对吸附影响的大小顺序为SO_4~(2-)<CO_3~(2-)<SiO_3~(2-)<PO_4~(3-)

铁镧复合氧化物纳米吸附剂的制备、表征及 As(Ⅲ)吸附性能研究

本研究采用共沉淀法制备了一种新型铁镧复合氧化物吸附剂(Fe-La),并对其表面特性及As(Ⅲ)吸附行为进行了系统研究.扫描电镜(SEM)和透射电镜(TEM)结果表明,铁镧复合氧化物具有纳米结构,初级粒子粒径范围为20~200 nm.X-射线衍射仪(XRD)表征结果表明,铁镧复合氧化物具有类似氢氧化镧的晶型结构.N_2吸附BET法结果表明,铁镧复合氧化物的比表面积为99.3 m~2·g~(-1).盐加入法测得吸附剂的等电点为7.8.As(Ⅲ)吸附实验结果分析表明,铁镧复合氧化物对As(Ⅲ)具有良好的吸附效果,最大吸附量(pH 7.0)为58.2 mg·g~(-1),Langmuir吸附等温线可较好地拟合铁镧复合氧化物对溶液中As(Ⅲ)的吸附(R~2=0.95);吸附速率较快,240 min内可完成吸附容量的80%,Elovich模型能较好地描述吸附过程(R~2=0.97);溶液pH对铁镧复合氧化物吸附As(Ⅲ)的影响较为明显;共存阴离子对吸附影响的大小顺序为SO_4~(2-)<CO_3~(2-)<SiO_3~(2-)<PO_4~(3-)

Instrument and method for classifying and discriminating algae based on chlorophyll analysis

本发明属于环境生物监测技术领域，具体地说是涉及一种基于叶绿素分析藻类分类和鉴别的仪器和方法。分析方法：采用光谱分析，利用混合双光束光源照射，激发待测水样内藻类叶绿素产生特征吸收光谱；根据吸收光谱波长和光强度变化，与预选各种不同藻类的吸收波长比较，区分个体间差异，进而实现藻类分类和鉴别。本发明通过外加激发光照射，激发水体内藻类所含叶绿素产生二次激发荧光。根据激发波长和光强度变化，以及二次激发光的波长和光强变化，即可快速简便的对藻类分类和鉴别

Alga classifying and distinguishing instrument based on chlorophyll analysis

本实用新型属于环境生物监测技术领域，具体地说是涉及一种基于叶绿素分析藻类分类和鉴别的仪器。仪器为混合双光束光源发射的激光照射在样品检测池上，在混合双光束光源与样品检测池之间的光路上依次设有激发光滤色片及激发光单色透射器；所述样品检测池内样品被激发产生的荧光依次通过二次激发光滤色片、二次激发光谱调节控制单元及光谱放大器投射在系统分析单元上。本实用新型根据激发波长和光强度变化，以及二次激发光的波长和光强变化，即可快速简便的对藻类分类和鉴别

一种壳-核结构磁性重金属吸附剂及其制备方法

本发明涉及水处理应用，具体的说是一种壳-核结构磁性重金属吸附剂及其制备方法。以磁性纳米铁锰复合物MnxFe3-xO4(x=0~1)为内核，锰氧化物为外壳的壳-核结构磁性重金属吸附剂。本发明所制备的壳-核结构磁性重金属吸附剂是纳米颗粒的聚集体，粒径范围为10nm~250nm，比表面积为70~120m2/g，对水体中铅、镉、汞、铜、镍、锌、钴等重金属离子均具有优异的吸附性能，吸附速度快，吸附容量高，当重金属浓度较低时，亦具有良好的去除效果；并且具有良好的磁性，饱和磁化强度为35~55A·m2·kg-1，可以进行磁性分离，分离速度快，操作简单，效率高，能耗低，且不会造成二次污染