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Chemical composition and major volatile compounds of the hydrolyzed product from Kappaphycus alvarezii by-products using flavourzyme
Abstract The chemical composition of flavourzyme hydrolysis product from Kappaphycus alvarezii by-products was analyzed. The results showed that the protein hydrolysate powder had high content of proteins (21.66%) and low content of lipids (0.22%). Hydrolyzed products contained about 15 free amino acids with relatively high content of some amin...
8 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 617 | Lượt tải: 0
$Geo-chemical fractionations of arsenic and lead in the surface sediments of Thuy Trieu lagoon, Khanh Hoa province$ Geo-chemical fractionations of arsenic and lead in the surface sediments of Thuy Trieu lagoon, Khanh Hoa province
Abstract The sequential extraction method of Tessier et al. was applied to identify the phase associations of As and Pb in the surface sediment of Thuy Trieu lagoon. The results showed that these two metals were mainly found in the residual fractions. Meanwhile, the carbonate fractions stayed at the lowest portions. Levels of arsenic and lead a...
9 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 638 | Lượt tải: 0
Determination of caffeine in the leaves and flowers of Camellia chrysantha by high-performance liquid chromatography with dad detection
Abstract. Caffeine (1,3,7-trimethylxanthine) is naturally found in the leaves, seeds or fruits of over 63 plants species worldwide. It is contained highly in coffee, tea, cacao beverage products. Caffeine showed good effects in enhancing performance and perception of exercise, reducing fatigue and drowsiness, and improving memory and learning ef...
7 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 714 | Lượt tải: 0
Study on the removal of ammonium in wastewater using adsorbent prepared from rice hull and magnesium chloride
Abstract. This study aimed to evaluate the ability of magnesium chloride modified carbonized rice hull (MCRH) material for ammonium removal from synthetic and domestic wastewater. The MCRH material was prepared by using waste rice hull from a household rice-processing factory and magnesium chloride salt via a simple mixing and annealing method. ...
11 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 952 | Lượt tải: 0
Macro-zooplankton abundance in relation to metal accumulation and water quality in Truc Bach lake
Abstract. Urban lake pollution is one of the serious issues due to suffering of waste discharged from householders. However, there is a gap of knowledge about the diversity of zooplankton species and how metals accumulate in zooplankton in urban ecosystems. We addressed this by determining the rule of blooming macro-zooplankton in the Truc Bach ...
8 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 614 | Lượt tải: 0
Removal of nickel, copper, and zinc ions from aqueous solution using coffee bean husk (CFH)
Abstract. Agricultural waste has received much attention for its potential of being efficient and low-cost adsorbents to remove heavy metals from water. This paper presents a batch investigation of the potential of an adsorbent produced from coffee bean husk for removing copper, nickel and zinc ions from aqueous solution. At the initial pH of 5....
7 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 700 | Lượt tải: 0
Removal of norfloxacin by TiO2-SBA-15 photocatalyst
Abstract. Ordered SBA-15 mesoporous silica support was synthesized by a sol-gel method using triblock copolymer Pluronic P123 and immobilized with different amounts of photocatalyst TiO2. The synthesized composites were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and N2 adsorption-desorption isotherms. The s...
7 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 564 | Lượt tải: 0
PM2.5 - Bound pahs in the indoor and outdoor air of nursery schools in Ha Noi, Viet Nam and health implication
Abstract. Thirty two daily indoor and outdoor PM2.5 samples at sixteen nursery schools in Ha Noi were taken from March to April 2018. 15 individual PAHs were analyzed by GC/MS. Mutagenic potential (MP) and carcinogenic potential (CP) were used to evaluate carcinogenic and mutagenic risk contribution. The average PM2.5 concentrations were 38.7 μg...
9 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 574 | Lượt tải: 0
Đề xuất cải tiến quy trình công nghệ sản xuất phèn nhôm từ cao lanh
TÓM TẮT Nhôm sunfat được sử dụng rộng rãi trong công nghiệp xử lí nước, công nghiệp giấy và công nghiệp dệt. Có nhiều hướng để sản xuất sản phẩm này và ở Việt Nam, cao lanh là nguồn khoáng dồi dào. Do đó chúng tôi đã nghiên cứu sản xuất nó bằng phương pháp hòa tách cao lanh trong dung dịch axit sunphuric. Trên cơ sở các thông số công nghệ tối ư...
6 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 659 | Lượt tải: 0
Nghiên cứu hoạt tính kháng khuẩn của hoạt chất α-Mangostin tách ra từ vỏ quả măng cụt Garcinia mangostana L
TÓM TẮT Trong số các hợp chất xanthone từ vỏ quả măng cụt, hợp chất α- mangostin được chứng minh là có hàm lượng cao nhất chiếm khoảng 0,02 - 0,2 %. Nhiều nghiên cứu đã chứng minh, hoạt chất α- mangostin có hoạt tính kháng khuẩn, chống viêm, chống oxy hóa và chống ung thư. Trong bài báo này, hoạt chất α- mangostin được tinh sạch từ vỏ của quả m...
8 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 836 | Lượt tải: 0

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