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the Effects of Nutritional Media and Initial Cell Density on the Growth and Development of Spirulina platensis

Journal of Agricultural Science and technology(A) 2017年第B10期7卷 60-67页

作者： nguyen Van Khanh nguyen thi Diem Le thi tuyet Nhan Phan Van Cu tran Quang Khanh Van Ngo thi Hoan Institute of Biotechnology Hue UniversityPhu ThuongPhu VangThua Thien Hue 530000Vietnam Faculty of Fisheries University of Agriculture and ForestryHue University102 Phung Hung StreetHue 530000Vietnam Faculty of Fisheries Ha Long University258 Bach Dang StreetUong Bi City 207900Quang NinhVietnam

the main objective of the study was to determine the effects of nutritional media and initial cell density on the growth and development of Spirulina *** study was carried out at the Center for Incubation and technology transfer,Hue University from May 2015 to August *** the first experiment,*** was cultured in four different nutritional media,including Zarrouk,Spi-RIA3,Nisole and thuoc medium(Vietnamese).Resulted showed that *** grew significantly in the Zarrouk medium rather than in other nutritional medium at the same time,and gained the maximum density of 2,736.5 mg/L after 13 d inoculums,with specific growth rate of 4.987%per day and the time to doubling population of 0.139 *** the second experiment,*** was cultured in six different initial cell densities:100,400,700,1,000,1,300 and 1,600 mg/L,and the optimum nutritional medium was Zarrouk medium selected from experiment *** showed at the initial culture density of 400 mg/L,the highest biomass was gained with the maximum density of 3,071.2 mg/L after 21 d inoculums,with specific growth rate of 9.15%per day and time to double population of 0.076 *** biomass from culture in Zarrouk medium at initial cell density 400 mg/L obtained total protein of 51.98%,total lipid of 1.75%,total carbohydrate of 0.75%,carotene of 0.36%and total minerals of 5.2%,on a basis of dry matter.

关键词： Spirulina platensis nutrient medium initial density growth rates

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Develop an Air Emission Inventory for Potential Point Sources in Northern Key Economic Zone and Simulate Its Impacts on Air Quality in Hanoi City,Vietnam

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现代交通（中英文版） 2022年第1期10卷 1-10页

作者： Bang Quoc Ho Khue Vu nguyen thoai tam Le Ngoc Cau Institute for Environment and Resources(IER) Ho Chi Minh city 700000Vietnam Department of Department of Academic Affairs Vietnam National UniversityHo Chi Minh city 700000Vietnam Vietnam institute of meteorology hydrology and climate change

the Northern Key Economic region of Vietnam is a dynamic economic center that is an important economic locomotive of the North and the whole of *** this area,large industrial parks are concentrated,attracting many large FDI *** industries:cement production,cars-motorcycles,electronics,...Economic development entails environmental *** industrial sector has been identified as the number one driving force driving the growth of Hanoi city and neighboring ***,industrial development is one of the main causes of environmental *** addition,the growth rate of industry in neighboring provinces significantly affects the air quality in Hanoi *** factories in Vinh Phuc,Hung Yen,Bac ninh and Hai Duong provinces have large sources of gas emissions,potentially affecting air quality around Hanoi *** results show that air pollution in Hanoi city is mainly caused by dust pollution,especially PM2.5 superfine *** is a very harmful dust to health;it is necessary to determine the cause and control ***,the objectives of this study are:(1)inventory of potential emissions sources for industrial activities in the northern key economic region around Hanoi;(2)Simulate air spread by AERMOD model to get an overall picture of the industrial impact of surrounding provinces in Hanoi city;(3)Propose solutions to manage air quality for the city in the coming *** results for pollutants with the highest concentration of NOx for 1 hour,24 hours and the average of the year is 7.94;1.02;0.222(μg/m3);of CO for 1 hour and 8 hours are 27.616;8.89(μg/m3);of SO2 for 1 hour,24 hours and the average of the year is 4.005;0.288;0.038(μg/m3);of PM2.5 for 1 hour,24 hours and the average of the year is 0.32;0.023;0.003(μg/m3);of PM10 in 1 hour,24 hours and year average are 1.03;0.074;0.098(μg/m3).

关键词： Air Pollution Air Emission Inventory Northern Key Economic Zone(NKEC) Potential Sources Industry Hanoi

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