Biodegradation of <Emphasis Type="Italic">Enteromorpha</Emphasis> polysaccharides by intestinal micro-community from <Emphasis Type="Italic">Siganus oramin</Emphasis>

Micro-communities are supposed to have more potential functions of biodegradation of polysaccharides than single strain; however, the intestinal micro-communities involved in the biodegradation of Enteromorpha polysaccharides (EP) were seldom reported. In order to obtain the EP-degrading micro-community, the intestines of Siganus oramin was obtained to isolate the micro-communities, which were enriched by 0.3% of EP as the sole carbon source. A stable micro-community with EP degradative capability was achieved after seven generations of subculture, named H1. Results showed that H1 was able to degrade 75% of EP within 24 hours, and the activity of EP lyases reached 500 U mL^?1 in 32 hours. With denaturing gradient gel electrophoresis (DGGE) and 16S rRNA gene clone library analysis, ten bacteria closely related to Marinomonas pontica, Microbacterium sp., Leucobacter chironomi, Cyclobacterium sp., Algoriphagus winogradskyi, Pseudoalteromonas sp. and Vibrio sp. were determined. Furthermore, compared with the DGGE bands sequence and the clone library analysis, the dominant bacteria of the EP-biodegrading micro- community were Pseudoalteromonas sp. and Vibrio sp., with the respective proportion of 38% and 46%, and they should play an important role in EP degradation together with other degrading bacteria in the micro-community H1.     

非物质文化遗产资源旅游开发价值评价体系与应用——以苏州市为例

旅游开发提高非物质文化遗产的自我生存能力,使其摆脱濒危的困境,是非物质文化遗产保护与利用的重要方式。本文对非物质文化遗产资源旅游开发研究进行梳理,在此基础上,构建了非物质文化遗产资源旅游开发价值评价指标体系,即由资源禀赋条件、可展示与体验性、遗产地旅游发展条件3个方面的要素组成,并以非物质文化遗产资源富集的苏州为例,对省级以上非物质文化遗产进行了评价,共评出三级旅游资源3项、二级旅游资源16项、一级旅游资源29项。主要结论为：产品衍生性、展示适宜性、是否具备可观赏性、遗产保护情况决定了非物质文化遗产资源是否能够成为旅游资源;可展示与体验性决定了非物质文化遗产旅游资源的旅游开发价值水平高低。手工艺类、民俗类非物质文化遗产具有较高的旅游开发价值,民间文学、传统体育游艺与杂技和传统医药的旅游可开发性较差。本文构建的非物质文化遗产旅游开发价值评价体系可为旅游地进行非物质文化遗产资源筛选和旅游开发提供科学依据。     

Hydrochemistry of geothermal water in Tianshui and adjacent area, Gansu province, China

A geochemical study on thermal water has been carried out in Tianshui and its adjacent area, Gansu province, China. Chemical and isotopic contents were employed in the investigation on the origin and evolution of thermal water and the evaluation of reservoir temperature in the geothermal systems. Thermal waters in Wushan and Tianshui are characterized by outlet temperatures from 15 to 38°C and low TDS (226?C255?mg/L), defined as bicarbonate water. Its origin may be attributed to the interaction between meteoric rain, biotite plagioclase gneiss and carbonate reservoir rocks. In contrast, thermal waters in Tongwei and Qingshui have higher outlet temperatures of 25?C54.2°C and a moderate TDS of 915?C1,793?mg/L, regarded as sulfate waters. These sulfate waters may arise from the interaction between meteoric water, granite and amphogneiss. Isotopic data presented here suggest that thermal waters in the study area have a meteoric origin without being significantly effected by water?Crock isotope exchange. Chemical geothermometry indicates the existence of a deep geothermal reservoir of low-to-medium enthalpy (70?C111°C) in the Tianshui study area.     

Thrusting of the North Lhasa Block in the Tibetan Plateau

A huge thrust system, the North Lhasa Thrust (NLT), was discovered in the northern Lhasa block of the Tibetan Plateau based on geological mapping of the Damxung region and its vicinity, the Deqen-Lunpola traverse and the Amdo-Bam Co profile. The NLT consists of the Dongqiao-Lunpola thrust (DLT), the west Namco thrust (WNT) and the south Damxung thrust (SDT) and ductile shear zones, ophiolite slices and folds extending in a WNW direction. Major thrust faults of the NLT seem to merge into a single deep-seated detachment of the upper-crust and totally displaced southward as far as 100-120 km. Chronological analyses with 39Ar-40Ar of plagioclase and hornblende, Rb-Sr isochron of minerals and fission-tracks of apatite from mylonite within the WNT yield ages of 174-173 Ma, 109 Ma and 44 Ma, showing 3 periods of thrusting in the north Lhasa block caused by subduction of the Tethys oceanic plate and the India-Eurasia continental collision respectively.     

新安县自动气象站报文传输质量分析

根据新安县自动站报文传输情况，分析了影响传输质量的因子，并提出提高报文传输质量的措施。     

一种使用(ε,δ)连接区域分割图象的新算法

图象中目标具有相似灰度特征,在分割中,我们应考虑区域的整体灰度以及相邻象素灰度的变化,它们依靠于范围参数ε和毗邻参数δ。本文介绍了灰度图象的（ε,δ）连续区域及其模糊边缘测度,提出了通过相对模糊边缘度调整（ε,δ）参数,利用（ε,δ）目标连接集分割图象的一种新算法。实验结果表明该算法分割效果较好,提取边缘精度较高。     

东海黑潮及琉球群岛以东海流研究进展

东海是西太平洋的一个边缘海,它西部有广阔的大陆架,东面以九州岛、琉球群岛(由奄美诸岛、冲绳诸岛、先岛诸岛组成)和台湾岛连线为界,具有较深的海槽。黑潮是一支高温、高盐、高流速的西边界流,它起源于菲律宾以东海域、流经台湾东岸进入东海,沿东海大陆架外缘向东北向流动，穿越吐噶喇海峡返回太平洋。通常的把自台湾东北端起至吐噶喇海峡一段称为东海黑潮。此外,在琉球群岛以东海域也常年存在一支稳定的西边界流,称为琉球海流。 对于东海黑潮和琉球海流的硏究,主要起步于20世纪80年代,通过进行中日联合调查研究、中日副热带环流调查研究等,取得了许多重要成果,苏纪兰(1994)、袁耀初(2000，Yuan,2006)、管秉贤(2002)等人都做过评述。本文基于以上研究评述,主要叙述200年以来对东海黑潮及琉球海流的硏究新进展。     

自动建模客观分型方法在非汛期人工增雨中的应用

根据安徽省人工影响天气业务系统需要,利用NCEP 500 hPa高度场和风场格点资料及安徽省81站10年非汛期逐日降水资料,在客观分析天气形势基础上,结合预报员实践经验给出的不同系统影响安徽省时的关键区,计算机自动建模,形成逐日天气型日历,实现环流分型客观化。此方法识别条件实用,模型物理意义明确,自动化程度高,自动生成的逐日天气型日历,为安徽省非汛期人工增雨作业指挥系统提供了很好的天气预报参考依据。     

秦山核电站邻近水域石油降解细菌的生态学研究

本文分析了1989年4月(春),7月(夏),10月(秋)和1990年1月(冬)秦山邻近水域表层水中石油降解细菌的丰度和分布规律,同时比较了温度、含油量、营养盐、溶解氧、盐度等环境因素对其数量变动的影响。分析结果发现,测区表层水中石油降解菌数量最高值达1.1×10~5个/dm~3,最低值为400个/dm~3,季节变化波动于97～4.9×10~4个/dm~3之间,菌量变化与水温,含油量呈正相关,与盐度呈负相关趋势,认为测区高营养盐、高溶解氧状况可能不成为石油降解细菌生长繁殖的限制因子,并指出测区低丰度的石油降解菌数量与该海区低水平的油污是一致的。