Over the last decades and centuries,European mountain landscapes have experienced substantial transformations.Natural and anthropogenic LULC changes(land use and land cover changes), especially agro-pastoral activitie...Over the last decades and centuries,European mountain landscapes have experienced substantial transformations.Natural and anthropogenic LULC changes(land use and land cover changes), especially agro-pastoral activities,have directly influenced the spatial organization and composition of European mountain landscapes.For the past sixty years, natural reforestation has been occurring due to a decline in both agricultural production activities and rural population.Stakeholders, to better anticipate future changes,need spatially and temporally explicit models to identify areas at risk of land change and possible abandonment.This paper presents an integrated approach combining forecasting scenarios and a LULC changes simulation model to assess where LULC changes may occur in the Pyrenees Mountains,based on historical LULC trends and a range of future socio-economic drivers.The proposed methodologyconsiders local specificities of the Pyrenean valleys,sub-regional climate and topographical properties,and regional economic policies.Results indicate that some regions are projected to face strong abandonment, regardless of the scenario conditions.Overall, high rates of change are associated with administrative regions where land productivity is highly dependent on socio-economic drivers and climatic and environmental conditions limit intensive(agricultural and/or pastoral) production and profitability.The combination of the results for the four scenarios allows assessments of where encroachment(e.g.colonization by shrublands) and reforestation are the most probable.This assessment intends to provide insight into the potential future development of the Pyrenees to help identify areas that are the most sensitive to change and to guide decision makers to help their management decisions.展开更多
As responses to metropolitan suburbanization and rural urbanization,the formation and evolution of urban fringes should be understood against the background of overall economic development and spatial reconstruction o...As responses to metropolitan suburbanization and rural urbanization,the formation and evolution of urban fringes should be understood against the background of overall economic development and spatial reconstruction of entire metropolises.At the same time,however,endogenous interactions between industrial structure and spatial patterns of non-agricultural activities are also worthy of scholarly attention.Since the 1980s,studies on urban fringes in China have been restricted by the lack of micro-level data.This paper investigates the spatial expansion and structural evolution of the urban fringe by taking the case of Beijing and uses systematic firm-level data in 1996 and 2001 from the National Census of Basic Units.The diversity of distribution patterns across industrial sectors brings about two interrelated results.On the one hand,structural adjustment of non-agricultural industries promotes the expansion and spatial evolution of the urban fringe.On the other hand,the stability and dynamics of industrial structure coexist in the moving urban fringe.This study also reveals that the outward-moving urban fringe is the optimal location for manufacturing,especially heavy manufacturing,as well as traditional producer and consumer services.However,industries with spatial stickiness such as tourism and sports have not moved with the fringe.Most advanced services remain concentrated in the city center.The authors argue that it is essential for understanding and managing urban fringes to take into account spatial evolution and industrial structural adjustment together with their interaction with each other.展开更多
This review describes the present hot research areas of mangrove-associated fungi, including its biodiversity, ecological roles, novel metabolites productions and biotechnological potential. Mangrove-associated fungi ...This review describes the present hot research areas of mangrove-associated fungi, including its biodiversity, ecological roles, novel metabolites productions and biotechnological potential. Mangrove-associated fungi were divided into saprophytic, parasitic and true symbiotic fungi based on its ecological roles. Saprophytic fungi are fundamental to decomposition and energy flow of mangrove, additionally, their potential toxicity also exists. Pathogenic fungi have significant effects on mangrove survival, growth, and fitness. Endophytic fungi, the most prolific source of diverse bioactive compounds found among that of mangrove-associated fungi, are found in most species of mangroves. Although a significant number of reports focused on the antimicrobial, insecticidal and other bioactive metabolites as well as many novel enzymes isolatcd from mangrove-associated fungi, and many of those metabolites from endophytic fungi are suspected to be of significant to mangrove, only few studies have provided convincing evidence for symbiotic producers in mangrove. Hence, this paper discusses the present progress of molecular methods used to correlate the ecological roles of endophytic fungi with their bioactive metabolites;, meanwhile, the potential of using metabolic engineering and post-genomic approaches to isolate more novel enzymes and bioactive compounds and to make their possible commercial application was also discussed.展开更多
The objectives of this study were to analyze the biodiversity of the Traditional Gudeuljang Irrigated Rice Terraces in Cheongsando, South Korea's representative GIAHS(Globally Important Agricultural Heritage Syste...The objectives of this study were to analyze the biodiversity of the Traditional Gudeuljang Irrigated Rice Terraces in Cheongsando, South Korea's representative GIAHS(Globally Important Agricultural Heritage System) site, with reference to position and land-use features, and to develop a plan to promote agricultural biodiversity in the region. We confirmed approximately 54,000 m2 of Gudeuljang paddy fields by an on-site survey. Of the Traditional Gudeuljang Irrigated Rice Terraces confirmed by onsite inspection, our survey showed that approximately 24,000 m2 are currently being used as paddy fields, approximately 15,000 m2 are being used as dry fields, and approximately 14,000 m2 are fallow. In terms of other non-agricultural land use, there was grassland, including graveyards; artificial arboreal land, such as orchards, rivers and wetlands, and man-made facilities, such as roads and residences. We also confirmed that the Traditional Gudeuljang Irrigated Rice Terraces had higher plant species diversity than conventional terraced rice paddies, and there was a difference in life form characteristics between the two types. Although the superficial topsoil structure is thesame for the Traditional Gudeuljang Irrigated Rice Terraces(TGIRTs) and conventional terraced rice paddies, it is thought that the differences in the subsurface structure of the TGIRTs contribute greatly to species and habitat diversity. However, the TGIRTs in Cheongsando are facing degeneration, due to damage and reduction in agricultural activity. The main cause is the reduction in the number of farming households due to an aging population in Cheongsando. In order to address this problem, we proposed a management plan, related to fallow paddy fields in South Korea, to initiate voluntary activities in the TGIRTs.展开更多
The trademark right refers to the dominating right that the trademark owners enjoy on the use of the trademark, which is an important intellectual property right. The objects of the trademark right should include all ...The trademark right refers to the dominating right that the trademark owners enjoy on the use of the trademark, which is an important intellectual property right. The objects of the trademark right should include all the rights of the use of the trademark, which not only include the registered trademark, but also include the unregistered trademark that has been used. The trade name is the logo of the legal persons or other organizations in the civil and commercial activities to mark themselves and differ from others.展开更多
China has abundant solar energy resource. Solar thermal collectors, particularly all-glass evacuated tubular collectors, have been studied and developed for 30 years, and solar thermal industry has developed rapidly f...China has abundant solar energy resource. Solar thermal collectors, particularly all-glass evacuated tubular collectors, have been studied and developed for 30 years, and solar thermal industry has developed rapidly for 15 years. There are various solar thermal systems, with an operation area of around 108 million m2 in 2007. These systems mainly provide domestic hot water, but some other applications are under extensive study and development as well.展开更多
The preservation of the traditional subsistence farming systems and the conservation of natural values (habitats, fauna and flora), in articulation with local development, was the key issues in this paper. The farme...The preservation of the traditional subsistence farming systems and the conservation of natural values (habitats, fauna and flora), in articulation with local development, was the key issues in this paper. The farmers have been able to manage the systems so as to cope with adverse conditions, but their future is quite uncertain. The methodology included: (1) field observation visits and cartographic information analysis of land use; (2) structured interviews with animal production and agro-forestry specialists; and (3) meetings with the participation of stakeholders. The paper concludes that depopulation is responsible for the increasing decline of agriculture and livestock. The decrease in agricultural activity in general and the consequent practices and traditional systems of agriculture causes changes in the landscape and has negative effects on nature conservation and biodiversity. Thus, we believe that the preservation and development of traditional economic activities linked to agriculture, agro-forestry and food processing are essential to maintain the typical landscape and to preserve natural values of Montemuro Site. The paper shows that in mountain areas, particularly those classified as nature network sites, farming, economic development and nature conservation are not antagonistic objectives.展开更多
Human activities significantly alter ecosystems and their services; however, quantifying the impact of human activities on ecosystems has been a great challenge in ecosystem management. We used the Universal Soil Loss...Human activities significantly alter ecosystems and their services; however, quantifying the impact of human activities on ecosystems has been a great challenge in ecosystem management. We used the Universal Soil Loss Equation and county-level socioeconomic data to assess the changes in the ecosystem service of soil conservation between 2000 and 2010, and to analyze its spatial characteristics and driving factors in the southwestern China. The results showed that cropland in the southwestern China decreased by 3.74%, while urban land, forest, and grassland areas increased by 46.78%, 0.86%, and 1.12%, respectively. The soil conservation increased by 1.88 × 10^(11) kg, with deterioration only in some local areas. The improved and the degraded areas accounted for 6.41% and 2.44% of the total land area, respectively. Implementation of the Sloping Land Conversion Program and urbanization explained 57.80% and 23.90% of the variation in the soil conservation change, respectively, and were found to be the main factors enhancing soil conservation. The 2008 Wenchuan earthquake was one of the factors that led to the degradation of soil conservation. Furthermore, industrial adjustment, by increasing shares of Industry and Service and reducing those of Agriculture, has also promoted soil conservation. Our results quantitatively showed and emphasized the contributions to soil conservation improvement made by implementing ecological restoration programs and promoting urbanization. Consequently, these results provide basic information to improve our understanding of the effects of ecological restoration programs, and help guide future sustainable urban development and regional industrial restructuring.展开更多
Surface tension of fluids is crucial for multiphase systems and is often controlled during industrial processes by introducing surfactants. In this study, effect of various microwave radiation modes on surface tension...Surface tension of fluids is crucial for multiphase systems and is often controlled during industrial processes by introducing surfactants. In this study, effect of various microwave radiation modes on surface tension of water was investigated as an alternative physical method to manipulate the surface tension without using chemicals. It is found that surface tension decreased quickly while temperature increased during microwave. Once the radiation was turned off, the temperature returned rapidly as expected. However, surface tension did not recover so much. The minimum surface tension after microwave radiation depended on the power. Moreover, a second radiation can have additional reduction on surface tension.展开更多
Land use, land-use change and forestry (LULUCF) activities can allow Annex I parties in the Kyoto Protocol to decrease their carbon emission reduction pressure, and comparably expanding more emission space for their...Land use, land-use change and forestry (LULUCF) activities can allow Annex I parties in the Kyoto Protocol to decrease their carbon emission reduction pressure, and comparably expanding more emission space for their domestic industries and energy production. The loopholes resulted from LULUCF activity types and specific accounting methods are always argued among the different parties, particularly including harvested wood products, influences of force majeure, threshold values of the reference level, and gross-net or net-net accounting methods. For estimating uncertainties in accounting loopholes, and to avoid that developed countries take advantage of the account{ng loopholes of LULUCF to decrease their emission reduction pressure, the LULUCF data submitted from the main developed countries in Annex I, including EU 27, Canada, Japan, and Russia, were collected. According to the analysis of these data, the loopholes influence the accounting results of LULUCF. The results show that the uncertainty of harvested wood products is excessive. The carbon sink produced by LULUCF activities will increase averagely by at least 30% without force majeure. The threshold values of the reference level of carbon sink should be set to a higher level. The net-net accounting method might be more suitable for LULUCF after 2012.展开更多
A series of ultra-concentrated liquid detergents (active matter content 〉 60%) was designed and formulated. The cold resisting, heat resisting and freeze-thaw stability of liquid detergent were tested, and their fo...A series of ultra-concentrated liquid detergents (active matter content 〉 60%) was designed and formulated. The cold resisting, heat resisting and freeze-thaw stability of liquid detergent were tested, and their foaming power, detergency, pH value as well as water-saving property were evaluated by Ross-Miles foam meter, Terg-O-tometer, pH detector and surface tensionmeter, respectively. The results showed that the ultra-concentrated liquid detergents product displayed excellent stability. pH value of liquid detergents were less than 9 with less skin irritation. The foaming power of 0.05% (weight fraction) of liquid detergents was appreciably lower than 0.2% standard liquid detergent.The detergency of 0.05% (weight fraction) of liquid detergents was better than 0.2% standard liquid detergent, especially for artificial sebum stained clothes; the water-saving of liquid detergents was better than standard liquid detergent, the surfactant concentration of second rinse solution of standard liquid detergent was 5.3 times than that of concentrated liquid detergent.展开更多
Full use of residues from industrial processes is a fundamental necessity of contemporary society, since it avoids impacts to the environment by using residues as inputs for other products of high economic and social ...Full use of residues from industrial processes is a fundamental necessity of contemporary society, since it avoids impacts to the environment by using residues as inputs for other products of high economic and social importance. In this study, lipase production of the crude enzymatic extracts obtained by Aspergillus niger using cassava peel as substrate and sunflower oil as an inductor was investigated. The optimized cultivation temperature and concentration of inductor were determined using the response surface methodology. The two variables studied exercised influence in the production of lipase in the 95% level of confidence. The response surface obtained indicated that the conditions that maximize lipase activity production were 30.5 ~C and initial concentration of sunflower oil was 2.5% (w/w). Through this analysis, it is evident that extremes in temperature and concentration of inductor tend to decrease lipase production, since low temperatures decrease metabolism and high temperatures may inactivate the lipase. Optimum lipase yield was 59.8 U/g of dry peel which was fermented for 60 h. Lipase production presents a peak of 61.3 U/g, at 72 h of fermentation. However, this value is statistically equal (p 〉 0.05) of the value of lipase activity obtained for 60 h and 84 h of fermentation.展开更多
The duty of educators and politicians is to find new policies and programs that should include creative industries such as designing, together with the teaching of new technologies to make it possible for a greater po...The duty of educators and politicians is to find new policies and programs that should include creative industries such as designing, together with the teaching of new technologies to make it possible for a greater portion of the population to have access to this knowledge, which will enable it to be included in the job market. This type of training also means that the language of the educators will change .We need to develop a new multilinguistic, multimedia, and multidisciplinary conception oriented towards the learning activities of the student. Our goals is to transform multimedia design into an important creative industry in our region, we created "Project Untitled" at Universidad Maimonides. This is an artistic collective undertaking that includes teachers, directors, and students of the School of Multimedia Communication and Design. The goal of this project is to cooperate with learning paradigms in order to reach the quality that a true society of knowledge needs. Education is fundamental for the development of any nation, including the "periphery countries", which can contribute a different point of view, and which, in this sense, can offer wider possibilities, precisely because these countries have the "critical distance" that, probably, core countries are short of.展开更多
Traditional logistics takes economic interest as the final goal. The frequency and changes of logistics activities have brought severe negative effects to the environment. At present, logistics industry has become the...Traditional logistics takes economic interest as the final goal. The frequency and changes of logistics activities have brought severe negative effects to the environment. At present, logistics industry has become the dominant industry in the third industries, and it is also the main driver for economic development. As more emphasis has been attached to the philosophy of sustainable development, low carbon emission and environmental protection, environmental logistics has become the trend of logistics management. In this paper, basic theories of logistics, development economics etc. are employed, the dialectical relationship between environmental logistics and sustainable development are analyzed through statistics, and proposals are put forward to develop environmental logistics.展开更多
This paper discusses how consumerism boosted youth lifestyle in the 1960s--mainly through modem magazines (particularly in Britain) and built a territorial symbolic identity through fashion. In the 1960s, the consol...This paper discusses how consumerism boosted youth lifestyle in the 1960s--mainly through modem magazines (particularly in Britain) and built a territorial symbolic identity through fashion. In the 1960s, the consolidation of youth culture becomes an international phenomenon. With the development of ready-to-wear, adolescents begin to be target as a consumer market. The music and fashion industries unite to create and advertise youth lifestyle. The fashion shifts from Paris to London. Magazine articles and publicity set the latest trends. The method applied is research in primary source--the British journal The Drapers' Record aiming to recognize fashion transformation and juvenilization in this period of time. The magazine shows ads and fashion editorials (mainly feminine), articles and news about fashion trend. There is also a brands guide for shoppers and retailers. The magazines used in the research are from 1964 to 1967, July and August issues, when the fall-winter trends are shown. From 1964 on, we notice the orientation towards a juvenile market and style, but these trends will only fully materialize through 1967. It leads to the conclusion that between 1965 and 1967 fashion juvenilization developed, reached its peak and global range.展开更多
基金supported by the MODE RESPYR project(ANR 2010 JCJC 1804-01)founded by the French National Science Agency(ANR)
文摘Over the last decades and centuries,European mountain landscapes have experienced substantial transformations.Natural and anthropogenic LULC changes(land use and land cover changes), especially agro-pastoral activities,have directly influenced the spatial organization and composition of European mountain landscapes.For the past sixty years, natural reforestation has been occurring due to a decline in both agricultural production activities and rural population.Stakeholders, to better anticipate future changes,need spatially and temporally explicit models to identify areas at risk of land change and possible abandonment.This paper presents an integrated approach combining forecasting scenarios and a LULC changes simulation model to assess where LULC changes may occur in the Pyrenees Mountains,based on historical LULC trends and a range of future socio-economic drivers.The proposed methodologyconsiders local specificities of the Pyrenean valleys,sub-regional climate and topographical properties,and regional economic policies.Results indicate that some regions are projected to face strong abandonment, regardless of the scenario conditions.Overall, high rates of change are associated with administrative regions where land productivity is highly dependent on socio-economic drivers and climatic and environmental conditions limit intensive(agricultural and/or pastoral) production and profitability.The combination of the results for the four scenarios allows assessments of where encroachment(e.g.colonization by shrublands) and reforestation are the most probable.This assessment intends to provide insight into the potential future development of the Pyrenees to help identify areas that are the most sensitive to change and to guide decision makers to help their management decisions.
基金Under the auspices of National Natural Science Foundation of China(No.40830746,40871075)
文摘As responses to metropolitan suburbanization and rural urbanization,the formation and evolution of urban fringes should be understood against the background of overall economic development and spatial reconstruction of entire metropolises.At the same time,however,endogenous interactions between industrial structure and spatial patterns of non-agricultural activities are also worthy of scholarly attention.Since the 1980s,studies on urban fringes in China have been restricted by the lack of micro-level data.This paper investigates the spatial expansion and structural evolution of the urban fringe by taking the case of Beijing and uses systematic firm-level data in 1996 and 2001 from the National Census of Basic Units.The diversity of distribution patterns across industrial sectors brings about two interrelated results.On the one hand,structural adjustment of non-agricultural industries promotes the expansion and spatial evolution of the urban fringe.On the other hand,the stability and dynamics of industrial structure coexist in the moving urban fringe.This study also reveals that the outward-moving urban fringe is the optimal location for manufacturing,especially heavy manufacturing,as well as traditional producer and consumer services.However,industries with spatial stickiness such as tourism and sports have not moved with the fringe.Most advanced services remain concentrated in the city center.The authors argue that it is essential for understanding and managing urban fringes to take into account spatial evolution and industrial structural adjustment together with their interaction with each other.
基金Foundation project: This work was supported partly by the Guangzhou Natural Science Foundation (Grant No. 2007Z3-EO581), the Guangdong Provincial Natural Science Foundation (Grant No. 2007A0200300001-7 05003268), the Chinese High-Tech 863 Project (Grant No. 2006AA09Z422), and the National Natural Science Foundation of China (Grant No. 20572136).
文摘This review describes the present hot research areas of mangrove-associated fungi, including its biodiversity, ecological roles, novel metabolites productions and biotechnological potential. Mangrove-associated fungi were divided into saprophytic, parasitic and true symbiotic fungi based on its ecological roles. Saprophytic fungi are fundamental to decomposition and energy flow of mangrove, additionally, their potential toxicity also exists. Pathogenic fungi have significant effects on mangrove survival, growth, and fitness. Endophytic fungi, the most prolific source of diverse bioactive compounds found among that of mangrove-associated fungi, are found in most species of mangroves. Although a significant number of reports focused on the antimicrobial, insecticidal and other bioactive metabolites as well as many novel enzymes isolatcd from mangrove-associated fungi, and many of those metabolites from endophytic fungi are suspected to be of significant to mangrove, only few studies have provided convincing evidence for symbiotic producers in mangrove. Hence, this paper discusses the present progress of molecular methods used to correlate the ecological roles of endophytic fungi with their bioactive metabolites;, meanwhile, the potential of using metabolic engineering and post-genomic approaches to isolate more novel enzymes and bioactive compounds and to make their possible commercial application was also discussed.
基金supported by the research program of Dongguk University
文摘The objectives of this study were to analyze the biodiversity of the Traditional Gudeuljang Irrigated Rice Terraces in Cheongsando, South Korea's representative GIAHS(Globally Important Agricultural Heritage System) site, with reference to position and land-use features, and to develop a plan to promote agricultural biodiversity in the region. We confirmed approximately 54,000 m2 of Gudeuljang paddy fields by an on-site survey. Of the Traditional Gudeuljang Irrigated Rice Terraces confirmed by onsite inspection, our survey showed that approximately 24,000 m2 are currently being used as paddy fields, approximately 15,000 m2 are being used as dry fields, and approximately 14,000 m2 are fallow. In terms of other non-agricultural land use, there was grassland, including graveyards; artificial arboreal land, such as orchards, rivers and wetlands, and man-made facilities, such as roads and residences. We also confirmed that the Traditional Gudeuljang Irrigated Rice Terraces had higher plant species diversity than conventional terraced rice paddies, and there was a difference in life form characteristics between the two types. Although the superficial topsoil structure is thesame for the Traditional Gudeuljang Irrigated Rice Terraces(TGIRTs) and conventional terraced rice paddies, it is thought that the differences in the subsurface structure of the TGIRTs contribute greatly to species and habitat diversity. However, the TGIRTs in Cheongsando are facing degeneration, due to damage and reduction in agricultural activity. The main cause is the reduction in the number of farming households due to an aging population in Cheongsando. In order to address this problem, we proposed a management plan, related to fallow paddy fields in South Korea, to initiate voluntary activities in the TGIRTs.
文摘The trademark right refers to the dominating right that the trademark owners enjoy on the use of the trademark, which is an important intellectual property right. The objects of the trademark right should include all the rights of the use of the trademark, which not only include the registered trademark, but also include the unregistered trademark that has been used. The trade name is the logo of the legal persons or other organizations in the civil and commercial activities to mark themselves and differ from others.
文摘China has abundant solar energy resource. Solar thermal collectors, particularly all-glass evacuated tubular collectors, have been studied and developed for 30 years, and solar thermal industry has developed rapidly for 15 years. There are various solar thermal systems, with an operation area of around 108 million m2 in 2007. These systems mainly provide domestic hot water, but some other applications are under extensive study and development as well.
文摘The preservation of the traditional subsistence farming systems and the conservation of natural values (habitats, fauna and flora), in articulation with local development, was the key issues in this paper. The farmers have been able to manage the systems so as to cope with adverse conditions, but their future is quite uncertain. The methodology included: (1) field observation visits and cartographic information analysis of land use; (2) structured interviews with animal production and agro-forestry specialists; and (3) meetings with the participation of stakeholders. The paper concludes that depopulation is responsible for the increasing decline of agriculture and livestock. The decrease in agricultural activity in general and the consequent practices and traditional systems of agriculture causes changes in the landscape and has negative effects on nature conservation and biodiversity. Thus, we believe that the preservation and development of traditional economic activities linked to agriculture, agro-forestry and food processing are essential to maintain the typical landscape and to preserve natural values of Montemuro Site. The paper shows that in mountain areas, particularly those classified as nature network sites, farming, economic development and nature conservation are not antagonistic objectives.
基金Under the auspices of National Key Technology Research and Development Program of China(No.2011BAC09B08)Special Issue of National Remote Sensing Survey and Assessment of Eco-Environment Change between 2000 and 2010(No.STSN-04-01)
文摘Human activities significantly alter ecosystems and their services; however, quantifying the impact of human activities on ecosystems has been a great challenge in ecosystem management. We used the Universal Soil Loss Equation and county-level socioeconomic data to assess the changes in the ecosystem service of soil conservation between 2000 and 2010, and to analyze its spatial characteristics and driving factors in the southwestern China. The results showed that cropland in the southwestern China decreased by 3.74%, while urban land, forest, and grassland areas increased by 46.78%, 0.86%, and 1.12%, respectively. The soil conservation increased by 1.88 × 10^(11) kg, with deterioration only in some local areas. The improved and the degraded areas accounted for 6.41% and 2.44% of the total land area, respectively. Implementation of the Sloping Land Conversion Program and urbanization explained 57.80% and 23.90% of the variation in the soil conservation change, respectively, and were found to be the main factors enhancing soil conservation. The 2008 Wenchuan earthquake was one of the factors that led to the degradation of soil conservation. Furthermore, industrial adjustment, by increasing shares of Industry and Service and reducing those of Agriculture, has also promoted soil conservation. Our results quantitatively showed and emphasized the contributions to soil conservation improvement made by implementing ecological restoration programs and promoting urbanization. Consequently, these results provide basic information to improve our understanding of the effects of ecological restoration programs, and help guide future sustainable urban development and regional industrial restructuring.
文摘Surface tension of fluids is crucial for multiphase systems and is often controlled during industrial processes by introducing surfactants. In this study, effect of various microwave radiation modes on surface tension of water was investigated as an alternative physical method to manipulate the surface tension without using chemicals. It is found that surface tension decreased quickly while temperature increased during microwave. Once the radiation was turned off, the temperature returned rapidly as expected. However, surface tension did not recover so much. The minimum surface tension after microwave radiation depended on the power. Moreover, a second radiation can have additional reduction on surface tension.
基金supported by China "973" projects of Special Negotiating Problems for LULUCF Response to Climate Change(No2010CB955702)Space-time Pattern of Carbon and Nitrogen and Water Flux of Chinese Terrestrial Ecosystem and its Regional Response(No 2010CB833504)
文摘Land use, land-use change and forestry (LULUCF) activities can allow Annex I parties in the Kyoto Protocol to decrease their carbon emission reduction pressure, and comparably expanding more emission space for their domestic industries and energy production. The loopholes resulted from LULUCF activity types and specific accounting methods are always argued among the different parties, particularly including harvested wood products, influences of force majeure, threshold values of the reference level, and gross-net or net-net accounting methods. For estimating uncertainties in accounting loopholes, and to avoid that developed countries take advantage of the account{ng loopholes of LULUCF to decrease their emission reduction pressure, the LULUCF data submitted from the main developed countries in Annex I, including EU 27, Canada, Japan, and Russia, were collected. According to the analysis of these data, the loopholes influence the accounting results of LULUCF. The results show that the uncertainty of harvested wood products is excessive. The carbon sink produced by LULUCF activities will increase averagely by at least 30% without force majeure. The threshold values of the reference level of carbon sink should be set to a higher level. The net-net accounting method might be more suitable for LULUCF after 2012.
文摘A series of ultra-concentrated liquid detergents (active matter content 〉 60%) was designed and formulated. The cold resisting, heat resisting and freeze-thaw stability of liquid detergent were tested, and their foaming power, detergency, pH value as well as water-saving property were evaluated by Ross-Miles foam meter, Terg-O-tometer, pH detector and surface tensionmeter, respectively. The results showed that the ultra-concentrated liquid detergents product displayed excellent stability. pH value of liquid detergents were less than 9 with less skin irritation. The foaming power of 0.05% (weight fraction) of liquid detergents was appreciably lower than 0.2% standard liquid detergent.The detergency of 0.05% (weight fraction) of liquid detergents was better than 0.2% standard liquid detergent, especially for artificial sebum stained clothes; the water-saving of liquid detergents was better than standard liquid detergent, the surfactant concentration of second rinse solution of standard liquid detergent was 5.3 times than that of concentrated liquid detergent.
文摘Full use of residues from industrial processes is a fundamental necessity of contemporary society, since it avoids impacts to the environment by using residues as inputs for other products of high economic and social importance. In this study, lipase production of the crude enzymatic extracts obtained by Aspergillus niger using cassava peel as substrate and sunflower oil as an inductor was investigated. The optimized cultivation temperature and concentration of inductor were determined using the response surface methodology. The two variables studied exercised influence in the production of lipase in the 95% level of confidence. The response surface obtained indicated that the conditions that maximize lipase activity production were 30.5 ~C and initial concentration of sunflower oil was 2.5% (w/w). Through this analysis, it is evident that extremes in temperature and concentration of inductor tend to decrease lipase production, since low temperatures decrease metabolism and high temperatures may inactivate the lipase. Optimum lipase yield was 59.8 U/g of dry peel which was fermented for 60 h. Lipase production presents a peak of 61.3 U/g, at 72 h of fermentation. However, this value is statistically equal (p 〉 0.05) of the value of lipase activity obtained for 60 h and 84 h of fermentation.
文摘The duty of educators and politicians is to find new policies and programs that should include creative industries such as designing, together with the teaching of new technologies to make it possible for a greater portion of the population to have access to this knowledge, which will enable it to be included in the job market. This type of training also means that the language of the educators will change .We need to develop a new multilinguistic, multimedia, and multidisciplinary conception oriented towards the learning activities of the student. Our goals is to transform multimedia design into an important creative industry in our region, we created "Project Untitled" at Universidad Maimonides. This is an artistic collective undertaking that includes teachers, directors, and students of the School of Multimedia Communication and Design. The goal of this project is to cooperate with learning paradigms in order to reach the quality that a true society of knowledge needs. Education is fundamental for the development of any nation, including the "periphery countries", which can contribute a different point of view, and which, in this sense, can offer wider possibilities, precisely because these countries have the "critical distance" that, probably, core countries are short of.
基金the project "Study on Ecological Economy of Shandong Province" supported by Social Science Office of Shandong Province (Grant No. O5DJ11)
文摘Traditional logistics takes economic interest as the final goal. The frequency and changes of logistics activities have brought severe negative effects to the environment. At present, logistics industry has become the dominant industry in the third industries, and it is also the main driver for economic development. As more emphasis has been attached to the philosophy of sustainable development, low carbon emission and environmental protection, environmental logistics has become the trend of logistics management. In this paper, basic theories of logistics, development economics etc. are employed, the dialectical relationship between environmental logistics and sustainable development are analyzed through statistics, and proposals are put forward to develop environmental logistics.
文摘This paper discusses how consumerism boosted youth lifestyle in the 1960s--mainly through modem magazines (particularly in Britain) and built a territorial symbolic identity through fashion. In the 1960s, the consolidation of youth culture becomes an international phenomenon. With the development of ready-to-wear, adolescents begin to be target as a consumer market. The music and fashion industries unite to create and advertise youth lifestyle. The fashion shifts from Paris to London. Magazine articles and publicity set the latest trends. The method applied is research in primary source--the British journal The Drapers' Record aiming to recognize fashion transformation and juvenilization in this period of time. The magazine shows ads and fashion editorials (mainly feminine), articles and news about fashion trend. There is also a brands guide for shoppers and retailers. The magazines used in the research are from 1964 to 1967, July and August issues, when the fall-winter trends are shown. From 1964 on, we notice the orientation towards a juvenile market and style, but these trends will only fully materialize through 1967. It leads to the conclusion that between 1965 and 1967 fashion juvenilization developed, reached its peak and global range.