Diffraction

everyone was equal, but he countered that “people who have to deal with black employees find this is not true.” Watson is no stranger to irrational annotations and controversies. He and Francis Crick relied in part on Rosalind Franklin’s X-ray diffraction data to determine the structure of DNA. They could not have proposed the correct structure as early in 1953 as they did without access to Franklin’s data. When they were awarded the…

Franklin after attending Cambridge College, took her studies to Paris, France where she went to Laboratoire Central des Services Chimiques de l'Etat. Here she worked with another crystallographer named Jacques Mering. Here she learned about X-Ray diffraction which led to her discovering the structure of DNA. Franklin also discovered the use of X-Rays to make images of crystalized solids with matter inside and not just crystals. Rosalind was extremely happy in Paris, and this gave her respect to…

Paragraph 1 The structural evolution of FePO4 studied from a temperature range of 294K to 1073K by neutron powder diffraction. It is unique from α-quartz isotopes. It is different because it’s a cation is a transition metal. The structure dimensions and atomic coordinates in the α phase tend to increase by great amounts as the high-temperature β-phase rises and exhibit first order transition at 980K. The atomic structure dimensions of the α-phase FePO4 increased in a non-uniform pattern with…

X-ray diffraction and backscattered electron analysis showed that H2 gas produced a greater decarburization of the WC phase. The dissolution and decomposition of the WC phase during the process produced a Co+W+C solid solution as binder phase and the formation of…

DNA strands. The phosphates are on the outside so that the phosphate-phosphate interhelical bonds are disrupted by water. Also, the hydrophilic phosphates caused the molecule to soak up water and lengthen causing the wet DNA to produce a sharp diffraction picture that resembled the pattern of a x; further proving phosphates are on the outside. Through Franklin’s research, phosphates were discovered to be on the outside of DNA strands which allowed other information to be put in place; such as…

For the Carleton Prize for Biotechnology, I would like to nominate the brilliant scientist Rosalind Franklin. Her crystallographic work at King’s College, London was a crucial contribution to the double-helix model of DNA discovered by James Watson and Francis Crick (Gregory, 2002). Her contributions to the scientific community are still being quoted today and without the discovery of the structure of DNA, present day scientific projects such as The Genome project would not have been possible…

1. Introduction It is becoming increasingly difficult to ignore the importance of zeolites, especially aluminum rich ones including A, X and Y types [1]. Y zeolite is widely used as catalyst or catalyst support but a proper post treatment process such as dealumination should be carried out [2, 3] to increase Si to Al molar ratio to values over 3, which is not achievable through direct synthesis [4]. Zeolite dealumination was introduced regarding instability of the framework in acidic and aqueous…

Abstract. In this work investigation for the effect of compressed CO2 on the morphology of the produced Polyaniline (PANI) was carried out. The conventional oxidative polymerization using ammonium peroxydisulfate as oxidizing agent was used with and without compressed CO2. The results showed that different morphologies of PANI nanorods and PANI nanoparticles were produced using the conventional polymerization with and without compressed CO2 respectively. Molecular characterization of the…

Introduction: Sildenafil Citrate (API) is more commonly known by its trade name, Viagra. The drug was discovered by Pfizer. It is used to treat penile dysfunction in men. The drug was firstly created in the 1990’s and was to be used as a treatment for high blood pressure, angina and chest pain. During Trials it was discovered that the drug had insignificant effect on angina. In turn an unexpected side-effect was discovered. The drug gave men a penile erection and sustained it for a period of…

temperatures. The compound has photosensitive characteristics, it possesses bioelectric chemical properties, but they are poorly oxidized by common oxidizing reagent. The polytype of K3[Fe(CN)6] are discussed in reference to cobalt salts by x-ray diffraction and Roman scattering as well. The method of preparing Potassium ferricyanide crystals is also investigated as well. The most common applications for the ion in the industry and pharmaceutical companies are discussed as well. Introduction…