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- Zhang, Jin-He, et al.
(författare)
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Tourism water footprint : an empirical analysis of Mount Huangshan
- 2017
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Ingår i: Asia Pacific Journal of Tourism Research. - : Routledge. - 1094-1665 .- 1741-6507. ; 22:10, s. 1083-1098
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Tidskriftsartikel (refereegranskat)abstract
- Water is an important factor for the sustainable development of tourism. We constructed a comprehensive model of the tourism water footprint (TWF), including tourism sewage and water for management, and used the world heritage Mount Huangshan as an example. The results showed that the total TWF, which included green, blue and grey water of Mount Huangshan in 2012, was about 10.19 million m(3)/year, approximately per tourist 3.39m(3)/day or 3387L/day. Tourism sewage and food were the main factors of water consumption. The spatial transfer of TWF led the spillover of tourism environmental impact, not only affecting Mount Huangshan but the Huangshan City and even nationwide. Tourist flow and temperature had a highly significant positive correlation with the TWF. Quantifying the TWF can reflect the pressure of tourists on water resources, and provide an effective decision-making basis for rational use of water resources.
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| 2. |
- Zhang, Yu, et al.
(författare)
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Virtual water trade of agricultural products : A new perspective to explore the Belt and Road
- 2018
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Ingår i: Science of the Total Environment. - : Elsevier. - 0048-9697 .- 1879-1026. ; 622, s. 988-996
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Tidskriftsartikel (refereegranskat)abstract
- The Belt and Road is an initiative of cooperation and development that was proposed by China. Moreover, most of the spanning countries faced water shortages and agriculture consumed a lot of water. Virtual water links water, food and trade and is an effective tool to ease water shortages. Therefore, this paper aims to understand the Belt and Road from the new perspective of virtual water trade of agricultural products. We considered agricultural products trade from 2001 to 2015. On the whole, the results indicated that China was in virtual water trade surplus with the countries along the Belt and Road. However, in terms of each country, >40 spanning countries were in virtual water trade surplus with China and eased water shortages. Russia had the largest net imported virtual water from China. Furthermore, the proportion of the grey water footprint that China exported to the spanning countries was much higher than that imported, no matter from the whole or different geographical regions. Moreover, more than half of the countries' virtual water trade with China conformed to the virtual water strategy, which helped to ease water crises. Furthermore, the products that they exported to China were mainly advantageous products that each spanning countries have. Virtual water trade is a new perspective to explore the Belt and Road. Agricultural products trade with China definitely benefits both the countries along the Belt and Road and China from the perspective of virtual water. The findings are beneficial for the water management of the countries along the Belt and Road and China, alleviating water shortages, encouraging the rational allocation of water resources in the various departments. They can provide references for optimizing trade structures as well. (c) 2017 Elsevier B.V. All rights reserved.
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| 3. |
- Albin, Björn, 1951-, et al.
(författare)
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Mental Health in the left-behind Children in the Fujian Province of China
- 2013
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Ingår i: Journal of Public Mental Health. - : Emerald Group Publishing Limited. - 1746-5729. ; 12:1, s. 21-31
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Tidskriftsartikel (refereegranskat)abstract
- Purpose - An increasing number of people are migrating within the borders of China. Some migrants have to leave their children behind, and 58,000,000 children are estimated to be living as left-behind children. Earlier studies have found severe mental problems in left-behind children, but different factors could influence their mental health. The aim of this study was to investigate the mental health of these left-behind children and to determine possible influencing factors.Design/methodology/approach - Data for this study were collected in one province of the P R of China with a validated instrument, the Strengths and Difficulties Questionnaire (SDQ) to investigate behavior in 13- to 15-year old children.Findings - No significant difference was found in total difficulty score and in any subscale score of SDQ when we compared left-behind children with children who were not left behind. A significant difference in emotional difficulty subscale score was found between girls who were left behind and girls who were not. Some socio-economic factors such as poor family economy and living with relatives, friends or grandparents, were identified as risk factors.Originality/value - When strategies for support of the mental health in left-behind children are developed, they will need to be individualized according to the gender, social and economic situation and focused on emotional and conduct problems.
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| 4. |
- Cui, Liang, et al.
(författare)
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Four additional natural 7-deazaguanine derivatives in phages and how to make them
- 2023
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Ingår i: Nucleic Acids Research. - : Oxford University Press. - 0305-1048 .- 1362-4962. ; 51:17, s. 9214-9226
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Tidskriftsartikel (refereegranskat)abstract
- Bacteriophages and bacteria are engaged in a constant arms race, continually evolving new molecular tools to survive one another. To protect their genomic DNA from restriction enzymes, the most common bacterial defence systems, double-stranded DNA phages have evolved complex modifications that affect all four bases. This study focuses on modifications at position 7 of guanines. Eight derivatives of 7-deazaguanines were identified, including four previously unknown ones: 2 & PRIME;-deoxy-7-(methylamino)methyl-7-deazaguanine (mdPreQ(1)), 2 & PRIME;-deoxy-7-(formylamino)methyl-7-deazaguanine (fdPreQ(1)), 2 & PRIME;-deoxy-7-deazaguanine (dDG) and 2 & PRIME;-deoxy-7-carboxy-7-deazaguanine (dCDG). These modifications are inserted in DNA by a guanine transglycosylase named DpdA. Three subfamilies of DpdA had been previously characterized: bDpdA, DpdA1, and DpdA2. Two additional subfamilies were identified in this work: DpdA3, which allows for complete replacement of the guanines, and DpdA4, which is specific to archaeal viruses. Transglycosylases have now been identified in all phages and viruses carrying 7-deazaguanine modifications, indicating that the insertion of these modifications is a post-replication event. Three enzymes were predicted to be involved in the biosynthesis of these newly identified DNA modifications: 7-carboxy-7-deazaguanine decarboxylase (DpdL), dPreQ(1) formyltransferase (DpdN) and dPreQ(1) methyltransferase (DpdM), which was experimentally validated and harbors a unique fold not previously observed for nucleic acid methylases.
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