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Recovery rare earth compounds from NdFeB magnet of waste HDDs and exploration the corrosion inhibition abitity for aluminium alloy
Abstract. The recovery of rare earth compounds from the magnet of waste HDDs and then fabricating a rare earth salt mixture used as an environmentally friendly corrosion inhibitor for metals is a prospective research direction. It has great significance in environmental protection and sustainable development. In this study, permanent magnets are...
11 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 405 | Lượt tải: 0
Metal complexes of π-Expanded ligands (4): Synthesis and characterizations of Copper(II) complexes with a schiff base ligand derived from pyrene
Abstract: An innovative π-expanded ligand derived from salicylaldimine ligand representing pyrene ring as a substitute for benzene ring was synthesized in 5 steps from commercially available pyrene. This unique bidentate ligand (1) was coordinated to Cu(II) metal centre for affording complex 2, which was characterized by IR, elemental, X-ray dif...
15 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 368 | Lượt tải: 0
Chronic effects of silver nanoparticles on micro-crustacean Daphnia lumholtzi
Abstract: This study aimed to enhance our insight on the potential toxicological effects of silver nanoparticles (AgNPs) into the aquatic environment. To investigate the chronic toxicity of nanoparticles, freshwater micro-crustacean Daphnia lumholtzi was exposed to different concentrations of 0.2, 0.5 µg/l AgNPs, and control, for 21 days. Toxico...
8 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 403 | Lượt tải: 0
Development of a device based on the respirometric principle for long-term monitoring of BOD and pH: A novel approach in wastewater characterisation
Abstract: Biochemical oxygen demand (BOD) and pH are two important parameters in environmental analysis that allow the assessment of water quality. Although the long-term determination of BOD and pH can provide more useful information about the wastewater characteristics, present commercial BOD devices do not usually meet this demand. This ...
5 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 376 | Lượt tải: 0
Modification of Alkyd with Epoxy and its Application for Paint - Part 1: Epoxy Alkyd Ester Manufacturing and some Properties of Paint made from this Ester
Abstract: The article introduces the modification of alkyd resin by epoxy resin to make epoxy alkyd ester. The study investigated the effects of reflux xylene content, the proportion of the constituents participating in the esterification reaction on the reaction processing and acidity index of the product. The infrared (IR) spectroscopy results...
9 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 384 | Lượt tải: 0
Nghiên cứu sử dụng đá ong biến tính trong quá trình Fenton dị thể để xử lý chất nhuộm màu
TÓM TẮT Trong nghiên cứu này, đá ong được biến tính bằng muối sắt (III) sunfat (Lat-Fe) sử dụng cho quá trình Fenton dị thể để loại bỏ chất nhuộm màu hữu cơ Reactive Yellow 160 (RY 160). Các đặc trưng cơ bản về thành phần hoá học, hình thái bề mặt và diện tích bề mặt riêng của đá ong sau biến tính được xác định thông qua phổ tán xạ năng lượng E...
10 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 380 | Lượt tải: 0
Pectin bioplastic films regenerated from dragon fruit peels
Abstract: Pectin extracted from dragon fruit peels was used to prepare pectin-based membranes by mixing with the plasticized agent polyethylene glycol (PEG) at pectin to PEG ratios of 5:1, 3:1, and 1:1. SEM images showed the resulting bioplastic films had a transparent yellowish surface without pores or cracks. The water content of the biopl...
5 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 431 | Lượt tải: 0
Comparison and applicability of Agilent EMR-Lipid and Captiva EMR-Lipid Sorbents in QuEChERS method for food analysis
Abstract: Agilent’s innovative EMR-Lipid and Captiva EMRLipid sorbents efficiently replace the traditional QuEChERS d-SPE clean-up products in selective lipid removal from fatty matrices, thus improving instrumental analytical reproducibility, reliability, and long-term use. These products have dual functionality; a hydrophobic interaction be...
7 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 367 | Lượt tải: 0
Determination of xanthophylls compounds in dietary supplements by HPLC-PDA
Abstract Adetermination of astaxanthin, lutein, and zeaxanthin in dietary supplements. These compounds n HPLC method using photodiode array detector (PDA) detector has been developed for the were separated on a C30 chromatography column with ethyl acetate: acetonitrile (12:88, v/v) containing 0.1% n-decanol as the mobile phase. Xanthophyll compo...
6 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 367 | Lượt tải: 0
Determination of Phytosterols in vegetable oils by GC-MS method
Abstract In this study, a method for determination of six phytosterols by gas chromatography-mass spectrometry with derivatization in vegetable oils was validated. The samples were hydrolyzed in an alkaline media at 70°C for 60 min. Then, the samples were performed liquid-liquid extraction with toluene. The phytosterols are derivatized to trime...
7 trang | Chia sẻ: thanhle95 | Ngày: 08/07/2021 | Lượt xem: 382 | Lượt tải: 0

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