amorphous‚ red selenium thin ®lms and their conversion to the hexagonal‚ gray modi®cation is presented. The method is based on deposition process from aqueous solution of selenosulfate by citric or ascorbic acid as oxidizing agents. The X-ray diffraction method is used for identi®cation of the deposited materials. Ultra-thin ®lms of both amorphous and hexagonal selenium are highly transparent in the Vis±NIR spectral region. # 2001 Elsevier Science B.V. All rights reserved. PACS: 81.15.-z; 81
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Rosalind Franklin was an English chemist who in 1951‚ started working on on studying DNA by using a technique called X-ray diffraction. Her expertise was the X-ray diffraction mostly of proteins and lipids in a solution on DNA fibers. Franklin and a student‚ Raymond Gosling‚ took pictures of DNA and made the observation that there are two forms of DNA; the “A” form‚ which is dry and the”B” form‚ which is wet. One of their pictures of this observations‚ known as Photograph 51‚ became famous and was
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D24BT8 Structural Biology Essay - What is the future of structural genomics in academia and industry? Cera Wong April 3‚ 2013 Structural genomics (SG) programs were formed by development of structure biology in large scale. Targets were selected from a specific genome‚ topologically similar types of proteins or protein families. (REF: Maksymilian) SG programs have developed more accurate and efficient methodologies on structure determination over the last decade (REF: Maksymilian)‚ where many
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between Wilkins and Franklin on her role. Franklin was Wilkins’s equal‚ but he believed she was an assistant. This led to hostility in their relationship‚ and possibly changed the course of her career. Franklin continued her research using the x-ray diffraction techniques she was taught in Paris on DNA and made tremendous discoveries using the technique. First‚ Rosalind discovered that there are two types of DNA and that the combination of them makes x-rays blurry. On May 2‚ 1952‚ Rosalind’s research student
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A Suggestion of Sound System Topic: A proposal solution of existing handset inconvenience in aircraft Team name: Mr. Taiwan Team member: William Young‚ Wallace Tang‚ Jason Wang and Jerry Huang Date: Dec 6th 2012 Introduction During air flight‚ passengers often use entertainment system to enjoy the journey. However‚ the traditional personal headsets device used with flight entertainment system came out some cumbersome due to vary inconvenience. This proposal is to propose a solution of
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the broken pencil effect that can be observed when a pencil is placed in a glass of water. The pencil seems to be "broken" at the surface of the water as the light waves go from the air to the water. Diffraction is the bending of waves around a barrier or through an opening. The amount of diffraction a wave experiences depends on two factors: the wavelength of the wave and the size of the barrier or opening the wave encounters. Sound travels around corners because it has relatively larger wavelengths
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Graphene based Supercapacitors with Improved Specific Capacitance and Fast Charging Time at High Current Density Santhakumar Kannappana‚ Karthikeyan Kaliyappanb‚c‚ Rajesh Kumar Maniand‚ Amaresh Samuthira Pandianb‚ Hao Yange ‚ Yun Sung Leeb‚ Jae-Hyung Janga‚f and Wu Lua‚e* a) Department of Nanobio Materials and Electronics‚ Gwangju Institute of Science and Technology‚ Gwangju 500-712‚ Republic of Korea. b) Faculty of Applied Chemical Engineering‚ Chonnam National University‚ Gwangju‚ 500757
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two main industries that use it will be the removal of nitrogen oxides in industrial exhaust gas and for the catalytic cracking of heavy oil. Finally this catalyst is being characterized using three methods which are the infrared spectra‚ X-ray diffraction as well as the TGA and DTA methods. 2.0 Introduction Catalyst is a substance that causes the change in rate of a chemical reaction. This reaction is known as catalysis and unlike other reagents that take part in a chemical reaction
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Extreme Ultraviolet Lithography MD JAWWAD REZANOOR (113001040); AMLAN SEN(092100040); MIZANUR RAHMAN(093052040) Azimur Rahman School of Engineering‚ Presidency University‚ Dhaka Abstract- Extreme Ultraviolet lithography (EUVL) is the leading technology‚ widely believed to take semiconductor lithography to the next generation. EUVL is the technology being considered for printing circuits at the 32nm node and below in a high volume manufacturing (HVM) environment fab. Compared to the traditional
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Physics Formulas: Mechanics Mechanics is the oldest branch of physics. Mechanics deals with all kinds and complexities of motion. It includes various techniques‚ which can simplify the solution of a mechanical problem. Here are some of the often required physics formulas falling in mechanics domain. Motion in One Dimension The physics formulas for motion in one dimension (Also called Kinematical equations of motion) are as follows. (Here ’u’ is initial velocity‚ ’v’ is final velocity‚ ’a’ is
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