维生素E对皱纹盘鲍幼鲍生长、存活及体成分的影响   总被引：8，自引：3，他引：8  

周歧存  麦康森  谭北平  徐玮 《海洋与湖沼》2001,32(2):125-131

于1997年5月在山东荣成石岛鲍珍品养殖场采集幼鲍，采用单因素试验方法进行幼鲍维生素E(VE）营养需要的研究。以酷蛋白和明胶为蛋白源，通过用不同浓度VE的饲料（E1－E7七个实验组），即在每100g饲料中分别添加0、5、10、20、50、100、200mgVE来饲喂幼鲍（平均体重为220－240mg)103天。结果表明，饲料中适量的VE具有促进幼鲍生长的作用；幼鲍软体部水分和脂肪含量不受饲料中VE添加水平的影响，然而饲料中VE添加水平显著影响软体部蛋白质含量；贝壳中灰分和钙、磷含量不受VE添加水平的影响。以增重和蛋白质增量为指标，皱纹盘鲍幼鲍饲料中VE的适宜含量为5－10mg/100g饲料。  相似文献   

NaHCO3浓度对塔胞藻、小球藻和新月菱形藻生长的影响     

梁英  麦康森  孙世春  梁广尧 《海洋科学进展》2001,19(2)

在温度为 ( 2 2± 1 )℃ ,盐度为 2 8的条件下 ,用不同浓度的NaHCO3( 0 ,1 0 0 ,2 0 0 ,40 0 ,80 0 ,1 2 0 0和 1 60 0mg/L)对青岛海洋大学微藻种质库保存的塔胞藻 (Pyramidomonassp.)、小球藻 (Chlorellaspp .)和新月菱形藻 (Nitzschiaclosterium )进行培养。实验结果表明 ,NaHCO3浓度对 3种海洋微藻生长的影响差异显著 ,经过 6d的培养 ,塔胞藻和小球藻的细胞浓度都在NaHCO3浓度为 1 2 0 0mg/L时达到最大值 ;新月菱形藻的细胞浓度在NaHCO3浓度为 40 0mg/L时达到最大值。  相似文献   

东太平洋海盆海山玄武岩特征   总被引：1，自引：0，他引：1  

康长生  梁德华  廖志良 《海洋地质与第四纪地质》1997,(2)

东太平洋海山玄武岩属于大洋岛屿拉斑玄武岩，主要由橄榄拉斑玄武岩、石英拉斑玄武岩和橄榄玄武岩组成，具有拉斑玄武岩系列和过渡玄武岩系列。岩石具有基质为拉斑玄武结构或间隐结构的斑状结构和气孔构造，斑晶主要由拉长石和普通辉石组成，基质除拉长石和玻璃质外，还有少量普通辉石和磁铁矿等，岩石化学成分中Ａｌ２Ｏ３、Ｎａ２Ｏ、Ｋ２Ｏ含量偏高。玄武岩中稀土元素分配型式基本相同，曲线较平坦，稀土分馏不明显，具Ｃｅ、Ｅｕ负异常，反映岩石具有共同的成因，属晚白垩世以来的产物  相似文献   

Effective and accurate use of difference in mean volume backscattering strength to identify fish and plankton   总被引：1，自引：3，他引：1  

Kang  Myounghee; Furusawa  Masahiko; Miyashita  Kazushi 《ICES Journal of Marine Science》2002,59(4):794-804

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莱州湾稀释扩散能力的研究   总被引：2，自引：0，他引：2  

康兴伦  李培泉  刘毓珊  赵长荣  苗绿田 《海洋科学》1990,14(1):41-45

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测绘常用坐标系转换框架设计分析     

杨康  徐爱功  唐龙江 《测绘与空间地理信息》2017,40(7)

针对现阶段各类坐标系间的高精度转换在定位导航等方面的重要理论意义和实用价值,根据现有的坐标转换模型设计了坐标转换框架,在坐标转换框架中确定一个中间坐标系,各个坐标系统之间的转换都通过中间坐标系来完成,从而建立框架下所有坐标系间的公共关系。新加入的坐标转换关系继承了坐标转换框架下原有的坐标转换关系,简化了新坐标系与框架下已有坐标系间的转化工作,坐标转换精度为20 cm,验证了使用坐标转换框架的可行性。  相似文献   

MapGIS平台下图件图式的定制与自动生成     

邓意媛  康承旭 《国土资源信息化》2017,(2)

通过分析MapGIS制图软件的工作特点,在微软.NET框架下应用C#语言和MapGIS K9(以下简称K9)的二次开发接口,在数据字典技术的支持下,总结了一套MapGIS平台下标准图式按需定制及自动生成的技术流程,对各行业的标准化制图及提高制图人员的工作效率有较好的作用,同时对相关人员研究其它数字化制图软件下的标准出图提供了一定的参考价值.  相似文献   

Evaluating historical simulations of CMIP5 GCMs for key climatic variables in Zhejiang Province,China   总被引：1，自引：0，他引：1  

Weidong?Xuan  Chong?Ma  Lili?Kang  Haiting?Gu  Suli?Pan  Yue-Ping?XuEmail author 《Theoretical and Applied Climatology》2017,128(1-2):207-222

Assessing the regional impact of climate change on agriculture, hydrology, and forests is vital for sustainable management. Trustworthy projections of climate change are needed to support these assessments. In this paper, 18 global climate models (GCMs) from the fifth phase of the Coupled Model Intercomparison Project (CMIP5) are evaluated for their ability to simulate regional climate change in Zhejiang Province, Southeast China. Simple graphical approaches and three indices are used to evaluate the performance of six key climatic variables during simulations from 1971 to 2000. These variables include maximum and minimum air temperature, precipitation, wind speed, solar radiation, and relative humidity. These variables are of great importance to researchers and decision makers in climate change impact studies and developing adaptation strategies. This study found that most GCMs failed to reproduce the observed spatial patterns, due to insufficient resolution. However, the seasonal variations of the six variables are simulated well by most GCMs. Maximum and minimum air temperatures are simulated well on monthly, seasonal, and yearly scales. Solar radiation is reasonably simulated on monthly, seasonal, and yearly scales. Compared to air temperature and solar radiation, it was found that precipitation, wind speed, and relative humidity can only be simulated well at seasonal and yearly scales. Wind speed was the variable with the poorest simulation results across all GCMs.  相似文献   

香港居民对内地游客在港行为的认知研究——基于可持续旅游的视角     

聂康  胡怡 《地域研究与开发》2017,36(4)

根据可持续旅游理论设计了一组游客行为评价指标,并以此为基础在香港居民中进行了问卷调查,以了解香港居民对内地游客在港旅游行为的认知。结果表明:香港居民对内地游客在港行为的认知比较负面,这有可能会影响到香港旅游的可持续发展。这种以可持续旅游和游客行为为基础的新视角可以更为深入地了解目的地居民对旅游发展的认知。  相似文献   

我国医学生死亡教育实施及研究述评     

Min Xu  HaiDong Han  ShiChang Kang 《寒旱区科学》2017,9(5):425-431

The degree-day model is one important method to estimate glacier melt, which is based on the specific relationship between glacial melting and the sum of daily mean temperatures above the melting point. According to the observation data on the Koxkar Glacier(KG) from 2005 to 2010, we analyzed the temporal and spatial variation of degree-day factors(DDF) and its influential factors. The results indicate that the average value of DDF was 7.2~10.4 mm/(°C·d) on the KG from 2005 to 2010. It showed a decreasing trend between 3,700 m and 4,200 m, and the deceasing trend was more obvious in the upper part of the KG. On a spatial scale, the DDF increased evidently with increasing altitude. The DDF ranged from3.6 to 9.3 mm/(°C·d) at 3,700 m a.s.l., with the average value of 9.3 mm/(°C·d). It varied from 6.9 to 13.0 mm/(°C·d) at4,000 m a.s.l., with the average value of 10.2 mm/(°C·d). During the period of ablation, the fluctuation of DDF was not significant at the lower altitude(3,700 m a.s.l.), but it decreased at the higher altitudes(4,000 m a.s.l. and 4,200 m a.s.l.).The debris changes the transmission of heat, which accelerates the melting of a glacier; and the DDF showed high value.This paper will provide the reference for temporal–spatial parameterization schemes of DDF on Tuomuer glaciers of the Tianshan Mountains.  相似文献