Phytoplankton assemblages in East China Sea in winter 2009

2009年12月23日—2010年1月5日在东海海域(24°00'—32°00'n,120°00'—128°00'E)68个站位进行了水文、化学和生物的综合调查,应用uTErMHl方法对调查海域的浮游植物群集进行了研究。经284个浮游植物采水样品的分析,共发现浮游植物4门67属171种(含13个未定种)。浮游植物群集主要由硅藻和甲藻组成,还有少量的蓝藻和金藻,物种以沿岸广温型为主,优势种为:具槽帕拉藻(PArAlIA SulCATA)、菱形海线藻(THAlASSIOnEMA nITzSCHIOIdES)、柔弱伪菱形藻(PSEudO-nITzSCHIA dElICATISSIMA)、安哥拉海链藻(THAlASSIOSIrA AngulATA=并基海链藻THAlASSIOSIrA dECIPEnS)和细弱海链藻(THAlASSIOSIrA SubTIlIS)等。调查浮游植物细胞丰度介于0.356x103—142.578x103个/l,平均值为14.137x103个/l;硅藻占浮游植物细胞丰度的比例最大,介于0.356x103—142.578x103个/l,平均值为13.023x103个/l;其次为甲藻,细胞丰度介于0.356x103—11.378x103个/l,平均值为1.177x103个/l。调查海域表层浮游植物细胞丰度的平面分布由硅藻刻画,高值区出现在调查区北部即长江口东北部海域,甲藻在调查区南部和东南部丰度较高。细胞丰度在水体中的垂直分布趋势为先上升后下降,最大值出现在10M层。从断面分布上看,细胞丰度在调查区近岸和远岸较高、中部较低。PEArSOn相关性分析表明,调查区浮游植物细胞丰度与磷酸盐和硅酸盐浓度呈显著正相关,与温度呈显著负相关,与硝酸盐相关性不明显。Totally 284 phytoplankton water samples were collected in a multidisciplinary investigation in East China Sea(24°00′—32°00′N,120°00′—128°00′E) from December 23th 2009 to January 5th 2010.Phytoplankton species composition and assemblage structure were studied by Utermhl method.A total of 171 taxa which belong to 67 genera of 4 phyla were identified.The phytoplankton community was mainly composed of Bacillariophyta and Dinophyta,and there were also a few species belonging to Cyanophyta and Chrysophyta.Most of the ecotypes of phytoplankton were temperate coastal species,and dominant species were Paralia sulcata,Thalassionema nitzschioides,Pseudo-nitzschia delicatissima,Thalassiosira angulata and Thalassiosira subtilis etc.Cell abundance ranged from 0.356×103 to 142.578×103cells/L with an average of 14.137×103cells/L,of which Bacillariophyta was the major group ranging from 0.356×103 to 142.578×103cells/L with an average of 13.023×103cells/L,followed by Dinophyta,ranging from 0.356×103 to 11.378×103cells/L with an average of 1.177×103cells/L.Horizontally,the surface distribution of cell abundance in survey area was mainly dominated by Bacillariophyta and the high value appeared in the sea northeast of Changjiang estuary.Dinophyta mostly concentrated in the southern and southeast part of the survey area where Kuroshio water flowed by.Vertically,the maximum of cell abundance was found in subsurface water,and along with the increase of the depth cell abundance firstly increased then decreased.According to the Pearson correlation analysis,the distribution of phytoplankton cell abundance was positively correlated with phosphate and silicata,negatively correlated with temperature,and nitrate′s effect on cell abundance wasn′t obvious.国家重点基础研究发展规划项目(2009CB421202

Bacterial Conversion of Sulfur-and Phosphorous-Compounds and Microbial Diversity in Sediments from a Near-Shore Marine-Cultural Region

对福建某近海养虾场底泥环境中硫和磷 2种元素的微生物代谢进行了研究 .结果表明 ,细菌代谢有机硫和无机硫产H2 S是养殖过程中造成H2 S污染的主要因素 ,利用半胱氨酸和硫代硫酸钠产生硫化氢的细菌数量分别为 1 .6× 10. 6和 4 . 35× 10. 3个·g-1底泥 ;进一步研究发现 ,芽孢杆菌属、盐芽孢杆菌属和微杆菌属等细菌是产H2 S的优势菌群 ,而硫酸盐还原菌的数量较少 ,仅为 2 5个·g-1,其产H2 S的作用不明显 .研究还发现 ,转化有机磷和无机磷酸盐的优势菌群属于好氧细菌 ,其中分解卵磷脂的细菌和产磷酸酯酶细菌的数量分别为 2 . 17× 10. 5和 1 2. 1× 10 6个·g-1,转化磷酸钙的细菌数量为 6 . 96× 10 3 个·g-1.本文从微生物学的角度探讨了养殖环境中硫、磷化合物的转化 ,提出细菌好氧代谢产H2 S是养殖环境潜在的污染因素 ,给出了一些改善和修复养殖环境生态的建议 .The H_2S-producing bacteria and the phosphorous-cycling bacteria in sediments from near-shore marine-cultural region were investigated. Results indicate that the bacterial H_2S production in aerobic condition is the dominating process to produce H_2S in the sediment of cultural pond. The total counts of H_2S-producing bacteria utilizing cysteine and Na_2S_2O_3 were 1.6×106 and 4.35×103 cells g -1 respectively. The counts of sulfate-reducing bacteria in the sediments were very little, only 2.5×101 g -1. Further results show that the bacterial counts of decomposing lecithin and secreting phosphatase were 2.17×105 and 1.21×106 g -1 respectively, bacterial counts of dissolving Ca_3PO_4 were 6.96×103 g -1. Traditional taxonomy and partial 16S rRNA gene sequencing on the H_2S-producing and phosphate-cycling bacteria indicate that most isolates could be classified as members of the following Genera: Bacillus, Halobacillus, Microbacterium, etc.中国科学院知识创新工程项目 (KZCX1 SW 12 Ⅱ ) ;; 中国科学院百人计划项目

ECOLOGICAL CHARACTERIZATION OF BACILLI IN SEDIMENT FROM A NEAR-SHORE MARINE HORTICULTRTAL REGION

通过对近海养虾场底泥中的细菌数量和类群的调查 ,发现有超过 5 0 %的细菌生物量是产芽孢细菌 ,因此对底泥中的产芽孢细菌进行了分离和纯化 ,通过对细胞形态、生理生化等特征的研究和对部分菌株的 16SrRNA基因的ARDRA分型、序列分析等 ,鉴定了 6 7株产芽孢细菌 ,其中 6 2株属于芽孢杆菌属 ,5株属于短芽孢杆菌属 .进一步对 6 2株芽孢杆菌属的细菌在底泥不同深度的分布进行研究 ,结果表明 ,巨大芽孢杆菌主要分布在底泥深度 0～ 6cm左右的区域 ,海洋芽孢杆菌、短小芽孢杆菌和蜡状芽孢杆菌主要分布于底泥 6cm以下的区域 ,与坚强芽孢杆菌性状相近的菌分布在底泥 2～ 8cm深度 ;与耐碱芽孢杆菌性状相近的芽孢菌广泛分布在 0～ 12cm区域 .讨论认为 ,应用这些产芽孢细菌资源在修复海洋环境和开发海水养殖微生态制剂方面具有一定可能性 .图 3表 3参 15A survey on microbial populations in the sediment from a near-shore mariculture region revealed that over 50% (by cells) of the biomass was spore-producing bacteria. Totally 67 strains of spore-producing bacteria were obtained and were identified by their cellular morphology, physiological and biochemical features. 12 of the 67 strains were further characterized by cloning their 16S rRNA genes. Results indicate that 62 out of the 67 spore-producing bacterial strains belong to the genus Bacillus and 5 strains belong to Brevibacillus. Among the 62 strains of Bacillus, B. megaterium, B. marinus, B. pumilus, B. cereus, B. thuringensis, B. sphaericus and B. firmus were identified, while other 28 strains could not be taxonomically identified and need further studies. The strains of B. megaterium mainly distributed in the zone above 6 cm of the sediments, and B. pumilus and B. cereus were dominant species in the sediment under depth of 6 cm. The unidentified bacilli distributed through out the entire zone (0～12 cm) of the sediment. The possibility of applying these bacilli for bioremediation of the polluted marine environments or for developing ecological preparations for horticultural is discussed. Fig 3, Tab 3, Ref 15中国科学院知识创新工程项目 (KZCX1 SW 1 2 Ⅱ );; 百人计划支持项目~

Analysis of Nitrate Reducing Community in a Near-shore Marine-cultural Sediments

通过对福建省沿海海水养殖场沉积物中参与氮循环的各生理群细菌数量分析 ,发现氨化和硝酸盐还原细菌是优势生理菌群 ,同时 ,表层泥样中的硝酸盐还原菌数量明显高于深层泥样。从该环境中分离获得 1 0 6株细菌 ,其中 5 8株具有硝酸盐还原能力 ,初步鉴定表明它们主要为芽孢杆菌属 (Bacillus)、盐芽孢杆菌属 (Halobacillus)、短芽孢杆菌属 (Brevibacil lus)、动性球菌属 (Planococcus)和动性杆菌属 (Planomicrobium)等革兰氏阳性细菌的成员 ;1 6SrRNA基因序列分析进一步证实该环境中的硝酸盐还原菌具有丰富的多样性The nitrogen-cycling bacteria in a near-shore marine-cultural sediments were investigated. Results indicated that ammonifying and nitrate-reducing bacteria (NRB) were the most abounding populations. The abundance of nitrate-reducing bacteria occurred in the surface layer of the sediment was higher than that in the bottom layer. 106 bacterial strains were obtained from sediment samples and were tested for their nitrate reducing ability. The results showed that 58 strains of them were able to reduce nitrate. The dominant nitrate-reducing strains were preliminarily identified as Gram positive bacteria and belong to the genus of Bacillus, Halobacillus, Brevibacillus, Planococcus and Planomicrobium.The richness of diversity of nitrate-reducing bacteria was further revealed by the analysis of the sequences of their 16S rRNA genes

沿海产盐区与非产盐区妊娠期妇女碘营养状况及甲状腺功能水平分析

目的了解福建沿海产盐区与非产盐区妊娠期妇女碘营养状况及其甲状腺功能水平,为防治碘缺乏病提供科学依据。方法选择产盐区翔安区和非产盐区集美区为调查点,每个点随机抽取60名以上妊娠期妇女作为调查对象,采集孕妇的家中盐样、尿样及血样,分别测定盐碘、尿碘及血清甲状腺激素。结果产盐区与非产盐区孕妇合格碘盐食用率分别为81.69%和100.00%;产盐区与非产盐区孕妇尿碘的中位数分别为120.55μg/L和153.35μg/L,尿碘孕中期>孕晚期;产盐区与非产盐区孕妇的甲状腺过氧化物酶抗体(thyroid peroxidase antibody,TPOAb),抗甲状腺球蛋白抗体(antithyroid glubulin antibody,TgAb),总三碘甲状腺原氨酸(total-triiodothyronine,TT3),总甲状腺素(total thyroxine,TT4),游离三碘甲状腺原氨酸(free triiodothyronine,FT3),游离甲状腺素(free thyroxine,FT4),促甲状腺激素(thyroid stimulating hormone,TSH),甲状腺球蛋白(tryroglobulin,Tg)中位数均在正常范围,产盐区与非产盐区孕妇的FT3、FT4、TSH之间差异均有统计学意义,产盐区孕妇的FT3、FT4均低于非产盐区,而产盐区孕妇的TSH则高于非产盐区。结论孕妇是易缺碘人群,产盐区孕妇相对非产盐区碘缺乏更为严重。应对孕妇开展常规碘营养和甲状腺功能监测,进一步做好碘营养知识的宣传教育工作,控制碘缺乏病的发生

沿海产盐区与非产盐区8～10岁儿童碘营养与智力水平分析

目的了解和比较沿海产盐区和非产盐区8~10岁儿童碘营养状况与智力水平,为采取针对性防治措施提供依据。方法选择产盐区翔安区和非产盐区集美区的小学为调查点,8~10岁儿童为调查对象,调查其家中碘盐食用情况、尿碘含量、甲状腺肿大情况和智商水平。结果产盐区和非产盐区儿童合格碘盐食用率分别为81.5%和98.6%;甲状腺肿大率分别为3.0%和0.7%,尿碘中位数分别为202.8μg/L和238.4μg/L,<50μg/L的比例分别为3.5%和1.0%。产盐区8~10岁儿童智商均明显低于非产盐区儿童;产盐区8岁儿童智商明显高于9岁和10岁儿童;非产盐区8岁儿童智商明显高于9岁和10岁儿童,9岁儿童智商明显高于10岁儿童。结论补碘能提高儿童智商,降低智力损害。要坚持食用碘盐,开展对孕妇、哺乳妇的碘营养监测

沿海产盐区与非产盐区18～45岁人群碘营养状况及甲状腺功能水平研究

目的掌握厦门市沿海产盐区与非产盐区居民盐碘、18～45岁人群碘营养和甲状腺功能水平状况,为采取针对性的防治措施提供依据。方法选择沿海产盐区翔安区和非产盐区集美区为调查点,调查居民合格碘盐食用率、18～45岁育龄期妇女和男性尿碘水平、甲状腺激素水平和海带、紫菜的摄入习惯。结果产盐区和非产盐区盐碘中位数均为27.21 mg/kg,合格碘盐食用率分别为95.33%和96.33%;18～45岁男性尿碘中位数分别为206.55μg/L和232.95μg/L,尿碘<100μg/L的比例分别为20.97%和10%;18～45岁育龄期妇女尿碘中位数分别为176.95μg/L和227.70μg/L,尿碘<100μg/L的比例分别为21.67%和25%;产盐区和非产盐区18～45岁男性和育龄期妇女的甲状腺激素TSH、Tg、FT3、FT4、TPOAb、TT3、TT4中位数均在正常值范围内;产盐区18～45岁男性的甲状腺功能亢进阳性率为3.4%、育龄期妇女的甲状腺功能减退和亚临床甲状腺减退症的阳性率均为1.67%,而非产盐区均为0。产盐区和非产盐区18～45岁男性和育龄期妇女中均有一定比例易患甲状腺免疫性疾病的人群。每月食用海带、紫菜的次数≥4次、1～3次和<1次的人尿碘组间比较无统计学差异。结论产盐区和非产盐区18～45岁男性和育龄期妇女碘营养总体处于适宜状态,应坚持食盐加碘措施,对育龄期妇女在婚前体检时开展常规碘营养水平和甲状腺功能检测

建筑物场景宽基线图像的准稠密匹配

室外建筑物纹理通常重复而且单一,在进行宽基线图像匹配时,得到的初始种子点匹配数量通常比较少,而且在匹配和扩散时存在匹配多义性问题,使得应用传统的宽基线准稠密匹配算法不能得到满意的结果。针对这一问题,提出了一种针对室外建筑物的宽基线图像准稠密匹配算法。算法从高斯差分空间提取最大稳定极值区域,以获取数量更多的初始种子点匹配;在仿射传递过程中,采用自适应支持加权计算匹配分数,去除匹配多义性问题。实验表明,提出的算法能获得比较满意的准稠密匹配结果

第二届全国爆炸与冲击动力学青年学者学术研讨会报告综述

简要介绍了第二届全国爆炸与冲击动力学青年学者学术研讨会的情况,概况总结了与会学者所做的报告内容.报告包括3个特邀报告、14个专题邀请报告和24个主题邀请报告,其中主题邀请报告分为爆轰和爆炸动力学、结构动力学和多尺度高性能计算、材料动力学和实验测试技术、复合材料结构的动态力学行为、轻质结构的吸能特性和优化设计等5个主题

mtbuilder: a user interface toolkit for multi-touch tabletop

针对基于WIMP范式的图形用户界面工具不能解决多触点交互桌面的多指手势识别、界面组件朝向等问题,提出基于自然用户界面通用隐喻OCGM(objects,containers,gestures and manipulations)的多触点交互桌面界面工具箱——MTBuilder.首先用层次化多触点数据表示模型存储多触点数据,然后对多指手势识别器进行动态管理以加速识别处理,最后基于OCGM设计并实现界面组件库.通过多人信息浏览、城市规划等原型系统的开发和实验评估可以看出,MTBuilder能够为交互桌面界面构造与快速原型系统开发提供强有力的支持.国家自然科学基金(U0735004,60673188)|国家“九七三”重点基础研究发展计划项目(2009CB320804)|国家“八六三”高技术研究发展计划(2009AA01Z337,2009GJA00045)|浙江大学CAD&CG国家重点实验室开放课题(A1009)To address the issue in multi-touch tabletop that the WIMP paradigm-based graphical user interfaces could not handle multi-finger gesture recognition and UI component reorientation, this paper proposes a new multi-touch tabletop UI toolkit, termed MTBuilder, based on the universal foundational metaphors OCGM(objects, containers, gestures, and manipulations). First MTBuilder employs a hierarchical data representation model to store the multi-finger information. Then it configures the gesture recognizers dynamically to improve the efficiency of recognition. Finally design the components of the user interface based on OCGM. Several typical prototypes are developed, such as multi-user InfoScan and city planning. The prototypes and the experimental results showed that MTBuilder can efficiently support construction and prototyping of a tabletop user interface