Oxide Ethylène

Tài liệu Trắc nghiệm Vô khuẩn - Tiệt khuẩn gồm có 30 câu hỏi trắc nghiệm sẽ giúp ích cho các bạn trong quá trình học tập, nâng cao, củng cố kiến thức của mình. Để nắm vững nội dung chi tiết mời các bạn cùng tham khảo tài liệu.

4p thuythui199 07-10-2021 99 4   Download

Recently, some of the furoquinoline alkaloids were found to have an interesting biological activity, for example, anti-cancer, antiplatelet aggregation and antifungal activities. The interesting biological activity made these compounds 1-13 attractive targets in organic chemistry. A novel generally applicable synthesis of furoquinolines is described. The condensation of 2- methoxy aniline and malonic acid in the presence of POCl3 gave 2,4-dichloro-8- methoxyquinoline. Then, treatment of this compound with sodium methoxide in methanol under reflux afforded 4,8-dimethoxyquinoline.

5p uocvong04 24-09-2015 68 5   Download

The research part comprised a systematic study of the synthesis and phase separation of Interpenetrating Polymer Network (IPN) gels consisting of crosslinked polyurethane (CPU) and polymethacrylic acid (PMA). CPU was prepared by crosslinking polyaddition between the triblock polyalkylene oxide (ethylene oxide-propylene oxide-ethylene oxide), diisocyanate, crosslinker (triethanolamine) and chain extender (1,4-butanediol). IPN gels based on CPU and PMA were formed by the sequential interpenetrating polymerization (two-stage procedure).

5p uocvong04 24-09-2015 57 7   Download

In 1998, it was first reported that a silica material with large, uniform mesopores arranged into a two-demensional hexagonal structure is synthesized using triblock copolymer and oligomer templates poly (ethylene oxide), (EO)n. This silica was denoted SBA-15. Up to now, it is believed that ordered mesopores of SBA-15 are connected through complementary pores (microporores and small mesopores) in the siliceous pore walls. SBA-15 can be readily synthesized using cheap materials and it shows attractive structural properties, very good hydrothemal stability.

5p uocvong01 24-09-2015 77 3   Download

Polylactic acid is one of the most popular bioplastics used in recent years and it is often mixed with other polymers or chemicals to form polymer blend because polylactic acid is able to accelerate biodegradation of polymer blends. This paper presents some results of study on polymer blend based on polylactic acid (PLA) and ethylene-co-vinylacetate copolymer (EVA).

5p uocvong01 24-09-2015 93 9   Download

In vitrorefolding of maltodextrin glucosidase, a 69 kDa monomericEscher-ichia coli protein, was studied in the presence of glycerol, dimethylsulfox-ide, trimethylamine-N-oxide, ethylene glycol, trehalose, proline and chaperonins GroEL and GroES.

11p media19 05-03-2013 39 4   Download

Hình ảnh chất lượng cao của phẫu trường rất cần thiết trong phẫu thuật nội soi. 1 đầu camera hiện đại đạt các tiêu chuẩn nhẹ, nhỏ, có hệ thống kính zoom, tự động chỉnh màu, tốc độ màn chập cao để điều chỉnh lượng ánh sáng đi vào. Có thể khử trùng dễ dàng với cả ethylene oxide và gluteraldehyde. Vài kiểu đầu camera có những nút nhô lên dùng điều chỉnh độ nhạy sáng, cân bằng máu trắng chuẩn và điều khiển máy thu Video, máy in hình v.v. các tính năng có thể thay đổi theo...

13p truongthiuyen9 04-07-2011 88 13   Download