A ratiometric fluorescent probe for hypoxanthine(Hx)detection was established based on the mimic enzyme and fluorescence characteristics of cobalt-doped graphite-phase carbon nitride(Co doped g-C_(3)N_(4)).In addition...A ratiometric fluorescent probe for hypoxanthine(Hx)detection was established based on the mimic enzyme and fluorescence characteristics of cobalt-doped graphite-phase carbon nitride(Co doped g-C_(3)N_(4)).In addition to emitting strong fluorescence,the peroxidase activity of Co doped g-C_(3)N_(4)can catalyze the reaction of O-phenylenediamine and H_(2)O_(2)to produce diallyl phthalate which can emit yellow fluorescence at 570 nm.Through the decomposition of Hx by xanthine oxidase,Hx can be indirectly detected by the generating hydrogen peroxide based on the measurement of fluorescent ratio I(F_(570)/F_(370)).The linear range was 1.7-272.2 mg/kg(R^(2)=0.997),and the detection limit was 1.52 mg/kg(3σ/K,n=9).The established method was applied to Hx detection in bass,grass carp,and shrimp,and the data were verified by HPLC.The result shows that the established probe is sensitive,accurate,and reliable,and can be used for Hx detection in aquatic products.展开更多
In order to investigate the current status of heavy metals pollution and food safety of aquatic products from Lake Taihu,atomic absorption spectrophotometry( AAS) was used to determine the contents of Pb,Cd,Cu,and Zn ...In order to investigate the current status of heavy metals pollution and food safety of aquatic products from Lake Taihu,atomic absorption spectrophotometry( AAS) was used to determine the contents of Pb,Cd,Cu,and Zn in the head,muscle and viscera of farmed and wild aquatic products. The results showed that the distribution patterns of heavy metals in different parts of aquatic products were quite different. Heavy metals were mainly distributed in the head and viscera of all investigated aquatic products except wild Carassius auratus. The contents of heavy metals in each part of aquatic products generally decreased in the following order: Zn > Cu > Pb > Cd. The levels of heavy metals pollution in the muscle tissue of farmed and wild aquatic products were different,with higher levels being found in the muscle tissue of wild aquatic products. Furthermore,the content of each heavy metal in muscle tissue was also different among different kinds of aquatic products,with both farmed and wild Metapenaeus ensis having the strongest Cu accumulation capacity while wild C. auratus having the strongest Zn accumulation capacity. The heavy metals pollution in the muscle tissue of aquatic products from Lake Taihu was generally at unpolluted to minor pollution level,and only a few of them were seriously polluted with heavy metals. The main pollution factors were Pb and Zn.展开更多
China is the largest producer and trader of aquatic products in the world, but does not mean that it belongs to the strongest power group of aquatic production and trade. This paper objectively analyzed the main probl...China is the largest producer and trader of aquatic products in the world, but does not mean that it belongs to the strongest power group of aquatic production and trade. This paper objectively analyzed the main problems existing in the high-speed development of China's aquatic product industry by empirical analysis. For example, the situation of quality and safety of aquatic products is serious now; the basic conditions of aquaculture lag behind the production development; aquatic industry is still in a low level of development and organization; and the quality and safety of aquatic products is the most main problem. This paper also revealed that fish would be the main source of animal-derived food, and the demand of characteristic aquatic products would continuously go up. Aquatic processing has initially formed a standard system. It drew a conclusion that it would be a good opportunity for China's aquatic processing industry in the future.展开更多
Hunan Yahua Aquatic Product Co., Ltd. is a professional aquatic product processing enterprise, an independence legal person under the listed company - Hunan Yahua Seeds Share Holding Co., Ltd.. Conveniently located at...Hunan Yahua Aquatic Product Co., Ltd. is a professional aquatic product processing enterprise, an independence legal person under the listed company - Hunan Yahua Seeds Share Holding Co., Ltd.. Conveniently located at Yiyang City of Hunan Province, the company is by the Dongting Lake, in the north of Shichang Railway, in the east of Changchang High Way and in the展开更多
This paper reviews the status and development of China's fisheries in the 12th five-year period using data from FAO,China Fishery Statistics Yearbooks,China Statistical Yearbooks and other sources.The main observa...This paper reviews the status and development of China's fisheries in the 12th five-year period using data from FAO,China Fishery Statistics Yearbooks,China Statistical Yearbooks and other sources.The main observations are as follows:in the 12th five-year period,China's aquatic products accounted for more than 35%of global aquatic production;China's aquaculture products accounted for more than 60%of global aquaculture production;in freshwater aquaculture,pond aquaculture accounted for about 70%of the national freshwater aquaculture production,and fish products were proportionally higher than others;in mariculture,bottom sowing and raft culturing products accounted for more than 50%of total marine aquaculture production and shellfish production was proportionally higher than others.There has been only a slow rise in capture production of wild fish over the same period.The freshwater catches from four provinces including Jiangsu accounted for half of the country's total freshwater catches,in which fish catches accounted for more than 70%.Marine capture production from four provinces including Zhejiang accounted for about 80%of the country's marine catches,in which fish catches accounted for more than 70%.There was an overall growth in production of processed aquatic products,particularly frozen aquatic products,surimi-based products and dry-cured products which together accounted for more than 80%processed seafood products.The average annual net income of fishermen per capita witnessed a growth of 11.71%,outpacing the GDP growth over the same period.With the rapid development of China's fisheries,there are also challenges such as overcapacity,low aquaculture product quality,resource overexploitation,as well as environmental problems.A change in approach,transformation and structure adjustment are suggested to reshape China's fisheries development model and to achieve the goal of sustainable development.展开更多
Microplastic pollution has become an increasingly important environmental issue worldwide in recent years because of its ubiquitous presence in different environmental media and its potential to affect the health of o...Microplastic pollution has become an increasingly important environmental issue worldwide in recent years because of its ubiquitous presence in different environmental media and its potential to affect the health of organisms and ecosystems.Aquaculture contributes significantly to the world's food production and nutritional supply,especially in developing countries.Widespread occurrence of microplastics in aquaculture systems has raised great concern regarding aquaculture production and food safety issues of aquaculture products.China is a world leader in aquaculture production,with freshwater aquaculture accounting for 59.1%of total aquaculture production of the world in 2020.Therefore,this review mainly focuses on recent research progress related to microplastic pollution in freshwater aquaculture systems in China.Results from the literature show that microplastics are present in freshwater aquaculture systems at abundances comparable to natural waterbodies in China.Microplastics can be ingested and remain in the body of aquaculture products.Exposure to microplastics can adversely affect the health of aquatic organisms and aquatic ecosystem functions.However,risks of microplastics in real world environment remain uncertain.Consumption of freshwater aquaculture products is not a major pathway for human exposure to microplastics.To provide scientific guidance for governmental decision-making and pollution control,future work should focus on progress in toxicological methodology and understanding the impacts of microplastics at community and ecosystem levels.展开更多
基金supported by the National Natural Science Foundation of China(21804050)the National Key R and D Program of China(2018YFD0901003)+2 种基金the Science and Technology Planning Project of Xiamen,China(3502Z20183031)the Fujian Provincial Fund Project(2018J01432)the Xiamen Science and Technology Planning Project,China(3502Z20183031)。
文摘A ratiometric fluorescent probe for hypoxanthine(Hx)detection was established based on the mimic enzyme and fluorescence characteristics of cobalt-doped graphite-phase carbon nitride(Co doped g-C_(3)N_(4)).In addition to emitting strong fluorescence,the peroxidase activity of Co doped g-C_(3)N_(4)can catalyze the reaction of O-phenylenediamine and H_(2)O_(2)to produce diallyl phthalate which can emit yellow fluorescence at 570 nm.Through the decomposition of Hx by xanthine oxidase,Hx can be indirectly detected by the generating hydrogen peroxide based on the measurement of fluorescent ratio I(F_(570)/F_(370)).The linear range was 1.7-272.2 mg/kg(R^(2)=0.997),and the detection limit was 1.52 mg/kg(3σ/K,n=9).The established method was applied to Hx detection in bass,grass carp,and shrimp,and the data were verified by HPLC.The result shows that the established probe is sensitive,accurate,and reliable,and can be used for Hx detection in aquatic products.
文摘In order to investigate the current status of heavy metals pollution and food safety of aquatic products from Lake Taihu,atomic absorption spectrophotometry( AAS) was used to determine the contents of Pb,Cd,Cu,and Zn in the head,muscle and viscera of farmed and wild aquatic products. The results showed that the distribution patterns of heavy metals in different parts of aquatic products were quite different. Heavy metals were mainly distributed in the head and viscera of all investigated aquatic products except wild Carassius auratus. The contents of heavy metals in each part of aquatic products generally decreased in the following order: Zn > Cu > Pb > Cd. The levels of heavy metals pollution in the muscle tissue of farmed and wild aquatic products were different,with higher levels being found in the muscle tissue of wild aquatic products. Furthermore,the content of each heavy metal in muscle tissue was also different among different kinds of aquatic products,with both farmed and wild Metapenaeus ensis having the strongest Cu accumulation capacity while wild C. auratus having the strongest Zn accumulation capacity. The heavy metals pollution in the muscle tissue of aquatic products from Lake Taihu was generally at unpolluted to minor pollution level,and only a few of them were seriously polluted with heavy metals. The main pollution factors were Pb and Zn.
基金Supported by Ministry of Education in China (10YJC790240)
文摘China is the largest producer and trader of aquatic products in the world, but does not mean that it belongs to the strongest power group of aquatic production and trade. This paper objectively analyzed the main problems existing in the high-speed development of China's aquatic product industry by empirical analysis. For example, the situation of quality and safety of aquatic products is serious now; the basic conditions of aquaculture lag behind the production development; aquatic industry is still in a low level of development and organization; and the quality and safety of aquatic products is the most main problem. This paper also revealed that fish would be the main source of animal-derived food, and the demand of characteristic aquatic products would continuously go up. Aquatic processing has initially formed a standard system. It drew a conclusion that it would be a good opportunity for China's aquatic processing industry in the future.
文摘Hunan Yahua Aquatic Product Co., Ltd. is a professional aquatic product processing enterprise, an independence legal person under the listed company - Hunan Yahua Seeds Share Holding Co., Ltd.. Conveniently located at Yiyang City of Hunan Province, the company is by the Dongting Lake, in the north of Shichang Railway, in the east of Changchang High Way and in the
文摘This paper reviews the status and development of China's fisheries in the 12th five-year period using data from FAO,China Fishery Statistics Yearbooks,China Statistical Yearbooks and other sources.The main observations are as follows:in the 12th five-year period,China's aquatic products accounted for more than 35%of global aquatic production;China's aquaculture products accounted for more than 60%of global aquaculture production;in freshwater aquaculture,pond aquaculture accounted for about 70%of the national freshwater aquaculture production,and fish products were proportionally higher than others;in mariculture,bottom sowing and raft culturing products accounted for more than 50%of total marine aquaculture production and shellfish production was proportionally higher than others.There has been only a slow rise in capture production of wild fish over the same period.The freshwater catches from four provinces including Jiangsu accounted for half of the country's total freshwater catches,in which fish catches accounted for more than 70%.Marine capture production from four provinces including Zhejiang accounted for about 80%of the country's marine catches,in which fish catches accounted for more than 70%.There was an overall growth in production of processed aquatic products,particularly frozen aquatic products,surimi-based products and dry-cured products which together accounted for more than 80%processed seafood products.The average annual net income of fishermen per capita witnessed a growth of 11.71%,outpacing the GDP growth over the same period.With the rapid development of China's fisheries,there are also challenges such as overcapacity,low aquaculture product quality,resource overexploitation,as well as environmental problems.A change in approach,transformation and structure adjustment are suggested to reshape China's fisheries development model and to achieve the goal of sustainable development.
基金supported by the National Key Research and Development Program of China(2018YFD0900701 and 2020YFD0900301).
文摘Microplastic pollution has become an increasingly important environmental issue worldwide in recent years because of its ubiquitous presence in different environmental media and its potential to affect the health of organisms and ecosystems.Aquaculture contributes significantly to the world's food production and nutritional supply,especially in developing countries.Widespread occurrence of microplastics in aquaculture systems has raised great concern regarding aquaculture production and food safety issues of aquaculture products.China is a world leader in aquaculture production,with freshwater aquaculture accounting for 59.1%of total aquaculture production of the world in 2020.Therefore,this review mainly focuses on recent research progress related to microplastic pollution in freshwater aquaculture systems in China.Results from the literature show that microplastics are present in freshwater aquaculture systems at abundances comparable to natural waterbodies in China.Microplastics can be ingested and remain in the body of aquaculture products.Exposure to microplastics can adversely affect the health of aquatic organisms and aquatic ecosystem functions.However,risks of microplastics in real world environment remain uncertain.Consumption of freshwater aquaculture products is not a major pathway for human exposure to microplastics.To provide scientific guidance for governmental decision-making and pollution control,future work should focus on progress in toxicological methodology and understanding the impacts of microplastics at community and ecosystem levels.
