http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Andrew Mcfarlane (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Mills, Andrew,Lawrie, Katherine,McFarlane, Michael Korean Society of Photoscience 2009 Photochemical & photobiological sciences Vol.8 No.3
The classic, non-photochemical blue bottle experiment involves the reaction of methylene blue (MB) with deprotonated glucose, to form a bleached form of the dye, leuco-methylene blue (LMB), and subsequent colour recovery by shaking with air. This reaction is a popular demonstrator of key principles in kinetics and reaction mechanisms. Here it is modified so as to highlight features of homogenous and heterogeneous photoinduced electron transfer (PET) (Pure Appl. Chem., 2007, 79, 293-465) reactions, i.e. blue bottle light experiments. The homogeneous blue bottle light experiment uses methylene blue, MB, as the photo-sensitizer and triethanolamine as the sacrificial electron donor. Visible light irradiation of this system leads to its rapid bleaching, followed by the ready restoration of its original colour upon shaking away from the light source. The heterogeneous blue bottle light experiment uses titania as the photo-sensitizer, MB as a redox indicator and glucose as the sacrificial electron donor. UVA light irradiation of this system leads to the rapid bleaching of the MB and the gradual restoration of its original colour with shaking and standing. The latter 'dark' step can be made facile and more demonstrator-friendly by using platinised titania particles. These two photochemical versions of the blue bottle experiment are used to explore the factors which underpin homogeneous and heterogeneous PET reactions and provide useful demonstrations of homogeneous and heterogeneous photochemistry.
-
Nano-structured composite calcium silicate and some novel applications
James H. Johnston,Thomas Borrmann,Daniel Rankin,Mathew Cairns,James E. Grindrod,Andrew Mcfarlane 한국물리학회 2008 Current Applied Physics Vol.8 No.3,4
Composite nano-structured calcium silicate materials have been prepared by reaction of a silica-containing solution with calcium ionsat elevated pH, characterised and tested in metal adsorption and anti-microbial applications. The material comprises nano-size plateletsthat self-assemble into particles of about 15l m in size with an open framework structure. These exhibit a high pore volume and liquidabsorption of about 500600 g oil 100 g. 1 silicate and a high accessible surface area of up to about 600 m2 g. 1trollable in the synthesis process. It has a high whiteness and brightness. XRD shows only short range order. The surface of the nano-sizeplatelets contain both silanol (SiOH) groups and Ca2+ ions which provide bonding sites for the adsorption of metal cations. As such,the nano-structured calcium silicate exhibits an excellent ability to recover metal cations from solutions such as Cu2+ down to the1mgkg. 1 level, demonstrating its potential in environmental clean-up applications. Similarly, silver ions can be adsorbed with the result-ing nano-structured calcium silicatesilver composites showing excellent antimicrobial activity againstStaphylococcus aureus(ATCC25923) down to very low silver levels of 1 mg kg. 1. The silver cannot be leached out easily. These composite particles can be incorporatedinto surface coatings, plastics and food packaging as an easily useable, eective and durable anti-microbial agent.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
