Estimating the economic impacts of climate change on infectious diseases: a case study on dengue fever in Taiwan     

Wei-Chun Tseng  Chi-Chung Chen  Ching-Cheng Chang  Yu-Hsien Chu 《Climatic change》2009,92(1-2):123-140

Researchers of climate change have suggested that climate change and variability has a significant influence on the epidemiology of infectious diseases, particularly vector-borne diseases. The purpose of this study is to explore how climate conditions and the dengue fever epidemic in Taiwan are related and to estimate the economic impact of climate change on infectious diseases. To achieve these objectives, two different methods, one involving the Panel data model and the other the Contingent Valuation Method (CVM), are applied in this study. At first, we use the Panel data model to assess the relationship between climate conditions and the number of people infected by dengue fever during the period from January 2000 to February 2006 in 308 cities and townships in the Taiwan. The results of the empirical estimation indicate that climate conditions have an increasingly significant impact on the probability of people being infected by dengue fever. The probability of being infected by dengue fever due to climate change is then calculated and is found to range from 12% to 43% to 87% which represent low, mid, and high probabilities of infection caused by climate change when the temperature is increased by 1.8°C. The respondent’s willingness to pay (WTP) is also investigated in the survey using the single-bounded dichotomous choice (SBDC) approach, and the results show that people would pay NT$724, NT$3,223 and NT$5,114 per year in order to avoid the increased probabilities of 12%, 43%, and 87%, respectively, of their being infected with dengue fever.  相似文献   

Foreword     

C. K. Tseng 《中国海洋湖沼学报》1982,1(1):1-4

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STUDIES ON THE GEPPELLA(CHLOROPHYTA) OF XISHA ISLANDS,SOUTH CHINA SEA     

C.K.Tseng 《中国海洋湖沼学报》1983,1(2):190-197

The genus Geppellais a small group of tropical and subtropical algae.It was establishedby Boergesen in 1940 on the basis of its uncalciferous frond and its characteristic of annularattachments of the filaments,with G.mortensenii Boergesen as the type of the genus.Sincethen four more species have been described,namely,G.decussata Dawson(1959),G.echino-caulos Cribb(1960),G.yaeyamense Tanaka(1963),and G.japonica Tanaka et Itono(1977).The species G.decussata was reported by Dawson from Isla San Francisco(Gulf of California)and the Marshall Islands,central Pacific,and later removed by Tanaka and Itono(1977)from the genus Geppella because of the absence of blade and of annular attachments of  相似文献   

钝顶螺旋藻藻胆体的简易制备及褐藻酸钠对其稳定性的保护作用   总被引：1，自引：0，他引：1  

张玉忠  周百成  曾呈奎 《海洋科学》1997,21(6):39-42

以钝顶螺旋藻为材料，用改进的简易方法分离得到完整藻胆体，室温最大荧光发射峰位于６８１ｎｍ，加水解离后最大荧光发射蓝移到６５５ｎｍ，Ｆ６８０有两个峰，分别位于６３８ｎｍ和６５０ｎｍ，从而表明藻胆是完整的。用４３６ｎｍ波长激发，没有出现Ｃｈｌａ的特征荧光峰，Ｆ７２０的荧光激发光谱，也没有出现Ｃｈｌａ的峰，表明藻胆体溶液中不含Ｃｈｌａ。在藻胆体溶液中加入１％的褐藻酸钠，室温下保存１５ｄ后，光谱特性没有变  相似文献   

红藻真江篱质粒的发现     

秦松  童顺  崔武  王希华  李亚非  吴光耀  张培军  曾呈奎 《海洋与湖沼》1994,25(4):349-352

于1992年4月一1993年4月，用液氮研磨-苯酚／氯仿抽提-异丙醇沉淀的方法提取青岛沿海产紫菜、真江蓠、龙须菜、海膜4种红藻的总DNA；利用Hoechst－CsCl密度梯度起离心法将叶绿体DNA与核DNA分开。对抽取的叶绿体DNA梯度组分电泳结果表明，真江蓠样品出现质粒的电泳条带。以透射电镜观察到闭会环状DNA图像（周长平均值为4.3×10－7m，约为1．3kb）；分子杂交结果显示，真江蓠质位与其叶绿体DNA之间没有同源性，而与核DNA之间有一定同源性。  相似文献   

胶州湾口内初级生产力的周年定点观测   总被引：10，自引：1，他引：10  

潘友联  郭玉洁  曾呈奎 《海洋与湖沼》1995,26(3):309-316

于１９８３年１１月－１９８５年１１月利用黑白瓶测氧法研究了胶州湾东南部的初级生产力及其与各环境因子的关系。结果表明，调查区内初级生产力的变化范围是０．１０－２．８２ｇ／（ｍ＾２．ｄ）碳，年初级生产量的平均是２０６ｇ／ｍ＾２碳，夏半年（５－１０月）的初级生产量平均占全年生产量的７３．４５％，浮游植物的光合作用对有效太阳辐射能的平均利用率是０．６４％，初级生产力与水温，日太阳辐射能等均呈明显的正相磁，  相似文献   

海带基因工程选择标记的研究   总被引：18，自引：5，他引：18  

武建秋  王希华  秦松  曾呈奎 《海洋科学》1995,19(5):42-45

海带幼孢子体对抗生素的敏感性实验证明，氯霉素可以作为海带基因工程中较理想的选择压力。本文得出了氯霉素对海带的半致死剂量，提示ＣＡＴ（氯霉素乙酰转移酶）基因可以用作海带基因工程的阳性选择标记基因。  相似文献   

Seismic response of long multiple-span highway bridges     

W. S. Tseng  J. Penzien 《地震工程与结构动力学》1975,4(1):25-48

Non-linear seismic responses are described for three prototype, long, multiple-span, reinforced concrete, modern highway bridge structures, namely the 5/14 South Connector Overcrossing and the curved Figueroa Street Under-crossing as designed by the California Department of Transportation, and a straight version of the Figueroa Street Undercrossing. The analytical seismic responses are discussed and are correlated with the apparent prototype behaviour experienced during the San Fernando, California, earthquake of 9 February 1971. In particular, the causes of collapse of the 5/14 South Connector Overcrossing are identified and examined. Finally, based on parameter studies of the seismic responses of these structures, general conclusions and recommendations related to seismic design methodology are presented.  相似文献   

钝顶螺旋藻质粒的电镜观察及杂交研究   总被引：4，自引：2，他引：4  

秦松  童顺  崔武  李亚菲  王希华  武建秋  吴光耀  张培军  曾呈奎 《海洋与湖沼》1994,25(5):560-563

于１９９２年６月－１９９３年４月，对钝顶螺旋藻质粒进行透射电镜观察及分子杂交研究。结果表明，利用层分子膜展开技术，能够观察到超螺旋以及闭合环形的质粒图象；Ｓ６质粒大小的平均值约为２．０ｋｂ，与电泳检测的结果稍有出科。斑点杂交结果表明，不同形态藻株Ｓ６、Ｆ３、Ｆ３弯与Ｆ３直质粒之间具有一定同源性，与染色体ＤＮＡ之间均显示同源性。对钝顶螺旋藻质粒的进一步研究将推动其基因工程育种的开展。  相似文献   

Resonance Induced by Edge Waves in Hua-Lien Harbor   总被引：2，自引：0，他引：2  

Guan-Yu?ChenEmail author  Chung-Ching?Chien  Ching-Ho?Su  Hsiang-Mao?Tseng 《Journal of Oceanography》2004,60(6):1035-1043

This article first reviews previous numerical studies on the resonance problem of Hua-Lien Harbor. All the research leads to the conclusion that resonance can be stimulated by 2-D infragravity waves. However, a literature survey suggests that outside the harbor these plane infragravity waves are too small to excite violent water-body movement inside. On the other hand, 3-D infragravity waves trapped along the coastline, also known as edge waves, are more likely to exist outside the harbor and their effect needs to be thoroughly discussed. Based on previous measurements, the response of Hua-Lien Harbor is best simulated using edge waves of 160 and 140 second periods and their resonance mechanisms are analyzed. The former case has a longitudinal resonant mode and hence the amplitude in the inner harbor is large. The latter case has a transverse mode in the outer basin and hence only berths in the outer basin are influenced. These features are both consistent with field measurement. Therefore, it is very likely that edge waves are responsible for the resonance of Hua-Lien Harbor. Finally, based on observation after the construction of the present offshore breakwaters, a theory is proposed to explain the trapping of incident edge waves, and a measure to further reduce the resonance is discussed.  相似文献