Diffraction

different kinds of DNA. In the spring of 1951, he met with Maurice Wilkins to consult some research. During the meetup, maurice showed James the x-ray diffraction pattern of crystalline DNA this was the first time he had seen anything like it. The very pattern was realized to have a simple answer the x-ray was so symmetrical, the same diffraction pattern was what sparked their idea that DNA was the shape of a helix. But this did not happen until after he met Francis…

She published five papers on the subject before she was 26 years old. Her work is still quoted today, and helped launch the field of high-strength carbon fibers. At 26, Franklin had her PhD and the war was just over. She began working in x-ray diffraction -- using x-rays to…

Influential People who contributed to Genetics: James Watson: James Dewey Watson is a Nobel Prize-winning biophysicist and researcher, who is credited with co-discovering the the double-helix structure of the deoxyribonucleic acid (DNA) in 1953 with Francis Crick. Crick and Watson’s first efforts towards learning the structure of the DNA came up with many attempts, but it eventually concluded in the spring of 1953. Their research portrayed the DNA model pulling forth the double-helical…

James Gregory was born on November 1638 in Drumoak, Aberdeenshire, Scotland. He was the youngest out of the three children his parents had. His father’s name was John Gregory and his mother’s name was Janet Anderson. His father was a minister at the Episcopalian Church of Scotland. James Gregory was initially educated at home by his mother. His mother endowed him with his appetite for geometry, because her uncle was an editor for the French mathematician Viete. James’s father died in 1651, and…

as it propagates through space or underground) of a transmitter and also the effective coverage area of transmitter. We know that when a signal travels from a wireless channel, it undergoes various types of Propagation Effects like – Reflection, Diffraction and Scattering because of the presence of obstructions like buildings, mountains, hills etc. Reflection is when the EM waves encroach on objects that are greater than the wavelength…

Phase Solubility results The phase-solubility diagram (figure 1) obtained was classified as AL type(20) because the apparent solubility of ISH increased linearly with β-CD concentration over the entire concentration range studies, thereby suggesting the formation of a water soluble complex. A slope value of less than one indicated that an inclusion complex in a molar stoichiometric ratio of 1:1 was formed between the drug and β-CD in solution. The stability constant (718.58 M–1), computed from…

University from studying math, chemistry, and physics. He attended Trinity College in England in 1909, and received a scholarship in math. In 1912, Lawrence took his first class honors in Science. That year, he was very interested in learning about the diffraction of X-Rays by crystals. Lawrence Bragg and his father started researching X-Ray crystallography. While continuing his studies, Lawrence served as technical adviser on sound of the British army in France from 1915 to 1919. Afterwards,…

Electron Motion Control and Imaging M. Th. Hassan Electron motion in atomic systems, which happens on timescales of attoseconds (10-18s), is at the heart of all phenomena in nature. For instance, the motion of electrons in the chemical bonds determines the structure change in the molecules. Therefore, controlling this fast electron motion, in turn, allows to control the molecular structure change. Additionally, recording snapshots of the electron motion will provide real-time access to all…

could easily test the substances and re-label the three bottles. (Hint: Ammonium ions do not provide a distinctive flame color). To easily test the substances and re-label the three bottles you could create a flame with the substances and use diffraction glasses to find the substance’s…

a) Microlens Micolens are small lenses with a diameter smaller than 1 mm, they can work by diffraction, refraction or a combination of these two. When arranged regularly on a single substrate they form a microlens array. In order to be considered a good quality lens, microlenses must have qualities such as to low wavefront aberrations, consistency of focal length and pitch across the array, durability and low price. (Daly 2001) Microlens arrays have several applications, such as CCD arrays,…