Based on the situation that the trade of manufactured goods takes the main position in Shandong Province,this paper identifies Shandong industrial pollutant discharge by three indices,which are industrial effluent dis...Based on the situation that the trade of manufactured goods takes the main position in Shandong Province,this paper identifies Shandong industrial pollutant discharge by three indices,which are industrial effluent discharge,industrial SO2 emission,and solid waste disposal.Furthermore,it conducts an empirical analysis of the trade terms of pollution content transfer on nine identified industrial sectors.The conclusion is that the increase in industrial effluent discharge,industrial SO2 emission,and solid waste disposal has paralleled the growth of the GDP in Shandong.The rapid economic growth brings obvious negative impact on the environment.Compared with that in 1998,the increase in the pollution content of exports in 2007 indicated that more environmental costs were generated with the economic development in Shandong.There is a need for optimization of foreign trade structure in Shandong,especially the need for increasing import of the pollution intensive products and decreasing the export of the pollution intensive products.The research on the relationship between manufactured goods trade and the environmental impact will make a contribution to the adjustment of foreign trade and environmental policies.展开更多
Hurricane fighting devices are recommended. The devices belong to the sphere of artificial weather conditions changes over the Earth surface. The purpose of the paper is the development of the original design of devic...Hurricane fighting devices are recommended. The devices belong to the sphere of artificial weather conditions changes over the Earth surface. The purpose of the paper is the development of the original design of devices for hurricane fighting. The decreasing of hurricane energy takes place under the reaction of directed air current against the hurricane air current mass. The air current is created by propellers, located in cylindrical frames with nozzles at a current exit. The devices function due to horizontal hurricanes air current. The essential factor lies in absence of influence on ecology. The devices are of simple constructions, it results in simplification of their production technology and lower cost,展开更多
Social conditions experienced prior to sexual maturity influence reproduction later in life in many animals. In simulta- neous hermaphrodites, variation in mating group size influences reproductive investment. As the ...Social conditions experienced prior to sexual maturity influence reproduction later in life in many animals. In simulta- neous hermaphrodites, variation in mating group size influences reproductive investment. As the mating group size increases, re- productive resources devoted to the female function decrease in favor of the male function. Prior to sexual maturity, many her- maphrodites have a protandrous phase during which they produce sperm and can fertilize hermaphrodites＇ eggs. In the simulta- neously hermaphroditic polychaete worm Ophryotrocha diadema, the cost of male reproduction during adolescence is spread over the whole energy budget of worms as shown by a reduced growth rate, a delayed age at sexual maturity and the shortening of life span compared to protandrous males that do not reproduce. Little is known on whether social conditions experienced dur- ing development affect reproductive investment of immature individuals. We investigated whether social conditions affected the length of the protandrous phase, body size and also the subsequent female fecundity of same-age protandrous individuals of O. diadema, which did not had to face competition for egg fertilization. Results show that in large group sizes protandrous males lengthened their protandrous phase, slowed down body growth and decreased their individual investment at the first egg laying compared to protandrous males that were reared in isolation. In the successive egg layings worms adjusted their egg output to the current social conditions. We interpreted these results as an indication that early social conditions represent a social stress result- ing in a reduction of the overall reproductive resources up to the first egg laying .展开更多
文摘Based on the situation that the trade of manufactured goods takes the main position in Shandong Province,this paper identifies Shandong industrial pollutant discharge by three indices,which are industrial effluent discharge,industrial SO2 emission,and solid waste disposal.Furthermore,it conducts an empirical analysis of the trade terms of pollution content transfer on nine identified industrial sectors.The conclusion is that the increase in industrial effluent discharge,industrial SO2 emission,and solid waste disposal has paralleled the growth of the GDP in Shandong.The rapid economic growth brings obvious negative impact on the environment.Compared with that in 1998,the increase in the pollution content of exports in 2007 indicated that more environmental costs were generated with the economic development in Shandong.There is a need for optimization of foreign trade structure in Shandong,especially the need for increasing import of the pollution intensive products and decreasing the export of the pollution intensive products.The research on the relationship between manufactured goods trade and the environmental impact will make a contribution to the adjustment of foreign trade and environmental policies.
文摘Hurricane fighting devices are recommended. The devices belong to the sphere of artificial weather conditions changes over the Earth surface. The purpose of the paper is the development of the original design of devices for hurricane fighting. The decreasing of hurricane energy takes place under the reaction of directed air current against the hurricane air current mass. The air current is created by propellers, located in cylindrical frames with nozzles at a current exit. The devices function due to horizontal hurricanes air current. The essential factor lies in absence of influence on ecology. The devices are of simple constructions, it results in simplification of their production technology and lower cost,
文摘Social conditions experienced prior to sexual maturity influence reproduction later in life in many animals. In simulta- neous hermaphrodites, variation in mating group size influences reproductive investment. As the mating group size increases, re- productive resources devoted to the female function decrease in favor of the male function. Prior to sexual maturity, many her- maphrodites have a protandrous phase during which they produce sperm and can fertilize hermaphrodites＇ eggs. In the simulta- neously hermaphroditic polychaete worm Ophryotrocha diadema, the cost of male reproduction during adolescence is spread over the whole energy budget of worms as shown by a reduced growth rate, a delayed age at sexual maturity and the shortening of life span compared to protandrous males that do not reproduce. Little is known on whether social conditions experienced dur- ing development affect reproductive investment of immature individuals. We investigated whether social conditions affected the length of the protandrous phase, body size and also the subsequent female fecundity of same-age protandrous individuals of O. diadema, which did not had to face competition for egg fertilization. Results show that in large group sizes protandrous males lengthened their protandrous phase, slowed down body growth and decreased their individual investment at the first egg laying compared to protandrous males that were reared in isolation. In the successive egg layings worms adjusted their egg output to the current social conditions. We interpreted these results as an indication that early social conditions represent a social stress result- ing in a reduction of the overall reproductive resources up to the first egg laying .
