New Materials of Plants in Fujian Province(II)

在对福建的丹霞植被进行调查时,发现福建省被子植物分布新纪录6个,分别是:卵叶阴山荠yInSHAnIA PArAdOXA、小花龙芽草AgrIMOnIA nIPPOnICA VAr.OCCIdEnTAlIS、阔柱黄杨buXuS lATISTylA、猫乳rHAMnEllA frAngulOIdES、休宁小花苣苔CHIrITOPSIS XIunIngEnSIS和宜昌苔草CArEX ASCOCETrA。标本存放于厦门大学植物本馆(Au)。During the course of investigating the plants in danxia of Fujian province, Southeast of China, six newly recorded taxa of Angiosperms were found.They are respectively Yinshania paradoxa, Agrimonia nipponica var.occidentalis, Buxus latistyla, Rhamnella franguloides, Chiritopsis xiuningensis and Carex ascocetra.The voucher specimens are deposited in the Herbarium of Xiamen University(AU).上海市绿化和市容管理局项目(G102405

In site continuous measurements of CDOM in water column by 10-AU portable fluorometer

10-AU便携式现场荧光仪以其稳定的性能、简单的操作和独特的现场检测功能,得到该研究领域国际同行的认可,并在所属研究领域发挥着积极的作用。本文介绍10-AU便携式现场荧光仪在水环境参数检测中的应用。结合在国内首次将该仪器用于近岸水域水样中CDOM的大尺度连续走航在线测定工作的实际,讨论该仪器在使用过程中的一些问题、经验和体会。The model 10-AU portable fluorometer has been appreciated and wildly used by many oversea labs due to its stability,convenience,direct measurement,durableness and compactness.In this paper,chromophoric dissolved organic matter(CDOM) was first in site continuous measured by the fluorometer in the estuarine water column in China.Some experiences and amelioration for improving the utilization of the fluorometer were summarized and discussed国家自然科学基金资助项目(20577037

Frequency effect in reading aloud irregular Chinese characters: an fMRI study

目的　利用事件相关功能磁共振成像技术观察出声阅读条件下不规则汉字频率效应的脑激活模式。方法　 8名非语言专业大学生在MR扫描过程中执行汉字出声阅读任务。用视觉方式随机呈现 40个形声字 ,其中高频、低频不规则字各 2 0个。结果　左侧额中回、左侧额下回、辅助运动区、左侧颞下回后部、双侧纹外皮层、左侧岛叶、扣带回前部表现出频率效应 ,即阅读低频汉字时的激活强于高频汉字。结论　出声阅读汉字特别是低频不规则汉字可激活主要语言加工区 ,可作为可靠而实用的临床诊断试验。扣带回前部与左侧额中回可能是汉字阅读的特殊脑

Overt responses during fMRI scanning and potential solutions of the artifacts

目的　探讨发声任务对功能磁共振成像的影响 ,并发展一系列数据处理方法 ,从而更完全地校正发声伪影。方法　 8名被试在磁共振扫描过程中执行汉字阅读任务 ,以 2 0 0个汉字作为刺激材料。每名被试完成两个发声阅读序列和两个默声阅读序列。采用三种不同的数据处理方法 ,其中前两种方法已有报道 ,而最后一种方法为本文首次提出。结果　与前两种方法相比 ,本文提出的方法更完全地校正了发声伪影的影响 ,信号的损失也较小。结论　利用适当的数据处理方法 ,功能磁共振研究中发声伪影可以得到有效校正 ; 发声任务可以应用于功能磁共振成像研究

Activation patterns in reading semi-regular Chinese characters processing: the impact of tone

目的:引入声调因素,运用功能磁共振成像技术进一步研究汉字规则性效应的脑激活模式。方法:13名被试在磁共振扫描过程中执行视觉方式呈现的汉字出声阅读任务,根据形声字声旁与整字间读音及声调相同与否,将刺激材料细分为同音同调字、同音异调字、异音同调字和异音异调字,每类20字。结果:四种条件均激活双侧额中回、额下回、前运动区及辅助运动区、左侧顶下小叶、双侧颞上回、双侧岛叶和右侧小脑,同时还各自激活了梭状回、颞中回、左内侧额叶等区域。另外,本实验还观察到这四种条件在右侧颞上回、双侧额下回等区域激活模式的特征性变化。结论:存在汉字加工的半规则效应,声调的作用不应忽略。</p

发声任务在功能磁共振成像中的应用及伪影校正方法探讨

目的 探讨发声任务对功能磁共振成像的影响，并发展一系列数据处理方法，从而更完全地校正发声伪影。方法 8名被试在磁共振扫描过程中执行汉字阅读任务，以200个汉字作为刺激材料。每名被试完成两个发声阅读序列和两个默声阅读序列。采用三种不同的数据处理方法，其中前两种方法已有报道，而最后一种方法为本文首次提出。结果 与前两种方法相比，本文提出的方法更完全地校正了发声伪影的影响，信号的损失也较小。结论 利用适当的数据处理方法，功能磁共振研究中发声伪影可以得到有效校正；发声任务可以应用于功能磁共振成像研究

Physiological effects of ocean acidification and nano-silver on juvenile jellyfish Rhopilema esculenta

Ocean acidification and nanometals pose a threat to marine animals,but the effects of ocean acidification and nanometal stress on jellyfish have not been reported. This study took the large edible jellyfish Rhopilema esculenta from the coastal China as the research object,and the physiological effects of acidification and AgNPs stress on the juvenile jellyfish were studied. The juvenile jellyfishes were exposed to two levels of pH(8.10 and 7.60)and three concentrations of AgNPs(0,20,and 200 mug /L)for 14 days,and their growth,swimming behavior and physiological indicators were measured. The results indicated that seawater acidification could significantly enhance the activities of catalase(CAT)and ion transport enzymes(Ca~(2+)-ATPase and Na~+K~+-ATPase),thereby alleviating the oxidative stress caused by AgNPs on juvenile jellyfish. AgNPs inhibited the activities of acid phosphate phosphatase(ACP),alkaline phosphatase(AKP)and superoxide dismutase(SOD)of juvenile jellyfish and affected energy metabolism,resulting in slow growth rate and redusced pulsation rate. With the increase of AgNPs exposure concentration,acidification led to higher levels of lipid peroxidation and a significant increase inmalondialdehyde(MDA)in jellyfish. This study identified the different physiological responses of juvenile jellyfish to the acidification and AgNPs and provided a reference for evaluating changes in Rhopilema esculenta populations under changing marine environments

出声阅读条件下不规则汉字频率效应的功能磁共振成像研究

目的利用事件相关功能磁共振成像技术观察出声阅读条件下不规则汉字频率效应的脑激活模式。方法8名非语言专业大学生在MR扫描过程中执行汉字出声阅读任务。用视觉方式随机呈现40个形声字，其中高频、低频不规则字各20个。结果左侧额中回、左侧额下回、辅助运动区、左侧颞下回后部、双侧纹外皮层、左侧岛叶、扣带回前部表现出频率效应，即阅读低频汉字时的激活强于高频汉字。结论出声阅读汉字特别是低频不规则汉字可激活主要语言加工区，可作为可靠而实用的临床诊断试验。扣带回前部与左侧额中回可能是汉字阅读的特殊脑区