汉语话语标记"所以"--母语者和新加坡汉语学习者使用情况对比研究 = The Chinese Discourse Marker "Suoyi": A Comparative Study of its Usage between Native Speakers and Singapore Mandarin Learners

Master'sMASTER OF ART

Rapid Propagation of Anoectochilus roxburghii

以金线莲(Anoectochilus roxburghii)试管苗带节茎段和顶芽为外植体,用正交试验筛选芽快速增殖的培养基配方,并研究生根粉(ABT)对促根壮苗的作用。结果表明,丛生芽增殖最佳配方为MS+BA 3.5mg/L+KT 1.5mg/L+NAA 0.6mg/L,两个月增殖倍数达3.5;3mg/L 3号生根粉对金线莲生根壮苗效果最佳,使植株生根条数、最长根、植株增高和增叶数分别比对照增加12.8%、34.1%、13.2%和22.4%,从而提高移栽成活率,3种不同基质均达到94%以上。Taking stem segments and apical buds as explants, the optimal culture medium for rapid propagation of Anoectochilus roxburghii were carried out by orthogonal screening experiment. MS + BA 3.5mg/L + KT 1.5mg/L + NAA 0.6mg/L gave the best result for multiplication of adventitious buds and proliferated buds for 3.5 times within 2 months. The growth media supplemented with ABT3 3mg/L increased the number of roots, the length of roots, the height of seedlings and the number of leaves by 12.8%, 34.1%, 13.2% and 22.4%, respectively.福建省漳州市科委项目(Z02028)资

Concentrations and distribution of polycyclic aromatic hydrocarbons and organo chlorides in surface sediment of Xiamen Western Harbour and Minjiang Estuary

参考美国EPA标准方法对厦门西港和闽江口的表层沉积物样品中持续性有机污染物PAHs、PCBs、和DDTs的含量及分布进行分析和考察 ,并对若干污染特征及成因进行探讨 .结果表明 ,厦门西港沉积物样品中总PAHs含量 (ng/ g(干重 ) )较闽江口海域为高 ,其中厦门样品测值范围是 42 5 3 - 15 2 2 4,大多高于 10 0 0 ,推断主要来源于石油类污染 ;闽江口为 316 8-12 6 0 7,大多低于 10 0 0 ,化石燃料燃烧可能是其主要来源 .PCBs和DDT的分析结果表明 ,PCBs并非两海域的主要污染物 ,其含量 (ng/ g(干重 ) )测值范围是厦门西港 9 72— 33 72 ,闽江口 8 71— 30 5 5 ;DDT类含量测值 (ng/g(干重 ) )厦门西港高于闽江口 ,范围分别为 8 6 1— 73 70和 6 17— 30 70 (河口高值站位为 6 3 88) ,空间分布呈近岸高于远岸趋势 .同时表明 ,在厦门海域表层沉积物中DDD是主要降解产物 ,而在闽江口DDE为主要降解产物The U.S.EPA analytical methods were employed to examine surface sediment concentrations of polycyclic aromatic hydrocarbons (PAHs) and organo chlorides (PCBs and DDTs) in Xiamen Western Harbour (XM),in June,1999,and Min River Estuary (MJ) in Oct., 1996.The spatial distribution and main possible sources of these pollutants were discussed.The ranges of PAHs concentration (ng/g(DW)) are 425-1520,with most values higher than 1000 in XM samples,and 315-1260,with most values lower than 1000 in MJ samples respectively.The main possible sources of sediment PAHs were identified as petroleum pollutants for Xiamen Western Harbour,and fossil fuel combustion products by river input for Minjiang Estuary,respectively.Sediment PCBs were found not the main pollutants in the study areas,with concentrations(ng/g(DW))ranging from 9.72 to 33.72,and from 8.71 to 30.55,in XM samples and MJ samples,respectively.Concentrations (ng/g(DW)) of sediment DDT and its degraded compounds show the trend of decreasing off the shore,while ranging from 20 to 70,and 6 to 30,in XM samples and MJ samples,respectively.Meaningful information also displays that the main degradation products are DDD in XM samples and DDE in MJ samples.As for the general results,the disadvantage of hydrodynamics,industrial and municipal wastewater discharge,and harbour activities are inferred as the main aspects of the factors affecting pollution in Xiamen Western Harbour,comparing with those in Minjiang Estuary,which is significantly affected by Minjiang River input.Measures for pollution prevention thus should be taken differently in the two areas

MBE生长面发射激光器的原位厚度监测

在MBE生长"DBR型结构性材料"的过程中,由于生长中的多层结构干涉效应,使高温黑体辐射谱呈现振荡现象,利用此现象辅以计算机数据拟合,可以实现MBE生长中层次、组分和厚度的实时监控,对MBE系统生长垂直腔型结构材料的实时质量监控有重要意义.利用红外高温仪对VCSEL器件生长全过程(包括谐振腔)及多种组分DBR的表观衬底热辐射振荡进行监测,采用准黑体模型,结合扫描电镜、光反射谱等结果进行了分析,理论与实验得到了较好的吻合

Catering Culture and Ethnic Boundary——Conversation about Catering Anthropology

以饮食与文化、食物与边界等方面,探讨了人类、饮食、文化的关联性,分析了饮食文化的层次性、多样性和丰富性。以饮食与文化、食物与边界等方面,探讨了人类、饮食、文化的关联性,分析了饮食文化的层次性、多样性和丰富性。Proceeding from the relationship between catering and culture, food and boundary, this conversation not Only covers the relevance among human beings, food and culture, the diversity and richness of Catering culture

饮食文化与族群边界——关于饮食人类学的对话

以饮食与文化、食物与边界等方面,探讨了人类、饮食、文化的关联性,分析了饮食文化的层次性、多样性和丰富性。以饮食与文化、食物与边界等方面,探讨了人类、饮食、文化的关联性,分析了饮食文化的层次性、多样性和丰富性

甘白杂交创制早熟油菜新种质的研究

为拓宽甘蓝型油菜遗传基础,解决甘蓝型油菜育种中早熟资源贫乏的问题,利用甘蓝型油菜(Brassica napus,2n=4x=AACC=38)与白菜类蔬菜(Brassica campestris,2n=2x=AA=18)的大白菜、小白菜和紫菜苔进行杂交,采用系谱法,经过连续10年的选择,培育出10个稳定的早熟优良品系,代号D1~D10。这些新种质的生育期比对照早2.5~9.5天,品质符合国家双低油菜标准,农艺性状各具特色。由于新种质拥有白菜A染色体的遗传背景,在杂交组合测配中,用这10个新种质比用非新种质材料配制杂交组合早熟,且获得高产组合的概率高出1倍以上

从羌族的黑水河到美国的中餐馆：吃还是不吃？

饮食文化的族群性问题 　　王明珂：把文化当作是一些客观存在的符号这样的看法，是一个受到很多检讨的概念。并不是那些客观存在的文化特征可以作为族群的边界，我群跟他群的区别，往往是我们主观建构、主观想象的