Spatial order through the family: the regulation of urban space in Singapore     

Christopher Mele 《Urban geography》2017,38(7):1084-1108

This article examines the regulation of urban public space through a study of the role of the family unit in past and present urban development in Singapore. Since the founding of modern Singapore 50 years ago, the nuclear family has remained the preferred social institution for state policies and subsequent regulation of education, housing, employment, health, leisure, social welfare and even neighborhood development. Drawing on primary government documents and field work and interviews with current and displaced small business owners on a commercial street in Chinatown, the article demonstrates how a “softer” version of spatial regulation emerged from an intersection of state commercial development policies that favored small, family-owned businesses and the extension of a family-based moral social order applied to the surrounding public spaces. The result is the regulation of Chinatown’s streets and sidewalks became inextricably bound up with the everyday operations of family-run businesses. More recently, state interest in creating an entertainment-based global Singapore has jeopardized this arrangement, as corporate gentrification threatens to displace family ownership of small businesses.  相似文献   

The Role of Community Identity in Cattlemen Response to Florida Panther Recovery Efforts   总被引：1，自引：0，他引：1  

Melissa M. Kreye  Elizabeth F. Pienaar  Alison E. Adams 《社会与自然资源》2017,30(1):79-94

The concept of community identity has often been employed to explain ways in which communities respond to agents that impact community well-being. Using a case study of the Florida cattlemen community, we examine how cattlemen understand and perceive regulatory efforts to recover the Florida panther on private ranch lands. The data comes from participants in the Florida cattlemen community, and was collected through in-depth interviews (n = 13), group interviews (n = 32), and written comments associated with a survey about panther conservation (n = 78). Our findings indicate that some cattlemen in Florida have a strong sense of community identity. Perceptions of government actions and variation in economic risks are critical factors in understanding how this community responds to federal interventions. Our findings suggest that the concept of community identity can be used to explain the responses of agricultural landowners to governmental policies that are perceived as a threat to collective identity.  相似文献   

海洋绿藻气生硬毛藻(Chaetomorpha aerea)和线形硬毛藻(C. linum)的形态与分子鉴定     

黄冰心  滕林宏  丁兰平 《海洋学报(英文版)》2016,35(4):118-123

Green macroalgae Chaetomorpha aerea and C. linum are taxonomically confused. In this paper, we tried morphological and molecular analyses to separate these two species. C. aerea and C. linum can be distinguished from morphological characteritics, such as frond dimension, cells size and shape, their mean length/width ratios(LWR), and cell walls constriction. Thalli of C. aerea attenuate basipetally, with diameter 270–500 μm at upper portion, 160–360 μm at middle portion, 100–160 μm at basal portion. For the upper part, the length of cells is less than their diameter. Cell walls usually constrict at the dissepiments, which are pellucid or colorless and give the filament beaded appearance. In contrast, thalli of C. linum often have a constant diameter of 90–300 μm within the same individual, cell walls usually do not constrict and cells are cylindrical or barrel shaped. The LWR is larger than that of C. aerea. Results show that the pairwise distance between two species is 3.6%–3.7% for 18 S r RNA gene and 53.5%–54.3% for ITS region. In phylogeny, they distribute at distant clades, which confirms a genetic divergence at molecular level. In addition, morphological data indicates that filament diameter of C. linum samples is highly variable, ranging from 90 μm to 300 μm. Then these two species can be considered as separate species.  相似文献   

口虾蛄高血糖激素基因全长cDNA的克隆及表达分析          下载免费PDF全文

刘海映  张秀芹  隋宥珍  李宏俊  邢坤  姜玉声  杨贵福  陈雷  张娜 《海洋学报》2016,38(6):98-109

本文首次采用RACE技术获得口虾蛄(Oratosquilla oratoria)眼柄部高血糖激素(crustacean hyperglycemic hormone,CHH)基因cDNA全长序列,共2 421 bp,5'UTR长度为180 bp,3'UTR 为1 821 bp,开放阅读框(ORF)长420 bp,编码139个氨基酸。预测蛋白二级结构α-螺旋23.74%,延伸链占23.02%,无规则卷曲占53.24%,预测分子量为15.47 kD,等电点(pI)为7.049。CHH成熟肽包含6个CHH家族中位置保守的Cys残基,C端为GK,推断为ES型CHH基因。聚类分析表明:口虾蛄CHH和十足目CHH聚为同一个分支的两亚群,具有较近的亲缘关系。荧光定量PCR分析结果表明,CHH基因在肠中表达量最高,在眼柄、触角中有较高的表达量,在肌肉中表达量相对较低,在卵巢中表达最低,而在精巢中不表达。  相似文献   

上海某河道整治工程测量方案设计与实施     

肖松涛 《测绘与空间地理信息》2016,(5)

新农村建设遇到的河道整治改造问题,需要进行测量工作以使工程便于开展。本文以具体工程实例为背景,就河道整治工程中涉及的地形图测量、河道断面测量及桥梁测量进行了方案设计,并评价测量成果,进行工程效益分析,对河道整治工程中测量工作的开展有借鉴作用。  相似文献   

Etmopterus alphus n. sp.: a new lanternshark (Squaliformes: Etmopteridae) from the south-western Indian Ocean     

DA Ebert  N Straube  RW Leslie  S Weigmann 《African Journal of Marine Science》2016,38(3):329-340

A new species of lanternshark, Etmopterus alphus (Squaliformes: Etmopteridae), is described from the south-western Indian Ocean. The new species resembles other members of the ‘Etmopterus lucifer’ clade in having linear rows of dermal denticles and most closely resembles E. molleri from the south-western Pacific. The new species is fairly common along the upper continental slopes off central Mozambique, at depths between 472 and 558?m, and is also found on the southern Madagascar Ridge in 650–792?m depth. It can be distinguished from other members of the E. lucifer clade by a combination of characteristics, including arrangement of flank and caudal markings, dimension of flank markings and shape, size and arrangement of dermal denticles along the body. Molecular analysis further supports the distinction of E. alphus from other members of the E. lucifer clade.  相似文献   

洪湖湿地大气调节价值评价研究   总被引：3，自引：3，他引：0  

周文昌  史玉虎  潘磊  庞宏东  郑兰英  付甜  胡文杰 《湿地科学与管理》2016,(4):27-30

以洪湖湿地为研究对象,基于现有研究资料对其大气调节服务价值进行了定量评价。结果表明:洪湖湿地大气调节服务总价值为254.52×106元/a,是过去研究结果的11.6倍,其中湿地植物净固定的温室气体价值(包含甲烷折算的排放价值)为58.50×106元/a,表现为较强的碳汇;湿地释放氧气价值为176.51×106元/a,增湿调温价值为19.51×106元/a。洪湖湿地植被净固定温室气体价值、释放氧气价值和增湿调温价值分别占大气调节服务总价值的22.98%、69.35%和7.7%。  相似文献   

Cep　OB4恒星形成区的IRAS观测     

罗绍光 《中国天文和天体物理学报》1995,(2)

对恒星形成区ＣｅｐＯＢ４的ＩＲＡＳ观测结果的详细分析和研究表明，与年轻星团Ｂｅ５９相联系的分子云物质的原始分布是高度成块的。Ｂｅ５９诞生于一个平均密度为１００─２００ｃｍ（－３）云的背向太阳一侧。强烈的电离辐射以及星风已经在其诞生地产生了一个半径大约为５ｐｃ的＂水泡型（Ｂｌｉｓｔｅｒ）＂电离氢区及与之相关的红外源。电离辐射也穿过云际介质到达与母云分离的另两个云的表面，形成了从侧面看到的电离波前及被压缩和加热的中性物质壳。在这个恒星形成区中，虽然有大量年轻恒星存在，但大质量恒星的形成已经停止。红外发射主要起源于标准尘埃粒子的热平衡发射。但在主激发星团Ｂｅ５９附近的ＨＩＩ区中２５μｍ发射的显著增强可能与某种与电离气体相混合的新型尘埃粒子有关。  相似文献   

紫金山天文台13.7米望远镜水脉泽观测星表     

韩溥  吴月芳 《紫金山天文台台刊》1995,14(3):184-221

本文简要总结了自1990年8月至1994年1日在紫金山天文台13.7米射电望远镜上进行的水脉泽源的观测,观测结果汇集为表1和图1。在所有435个观测对象中共观测到195个水脉泽源,其中108个为新探测到的 本文对观测仪器和数据处理亦作了简要介绍。  相似文献   

南极沿海伯尔顿盐湖两种越冬浮游动物温度耐性的初步研究          下载免费PDF全文

王自磐 《极地研究》1988,1(2):28-36

本文报导了南极大陆沿海伯尔顿湖两种越冬浮游动物:双刺镰状水蚤和球栉水母的耐热和耐过冷能力的实验.结果表明,两种动物具有较强的温度耐性,其12小时LD_(50)的上、下限温度,雌性双刺镰状水蚤可在14.8℃和—10℃偏下,球栉水母可在13.1℃和—8℃偏下.它们忍受的温度范围大于其他一些南极沿岸海洋无脊椎动物的.这两种动物的耐温能力有明显的季节差异,表明动物具有较强的适应环境温度变化和生理调节能力,这可能是受环境温度自然驯化的结果.  相似文献