Diffraction

structures of the ZnO and ZnO/CR nanoparticles. The elemental analysis of both ZnO and ZnO/CR were determined by SEM-EDS using ZAF method standardless quantitative analysis [14]. The crystal structure of ZnO and ZnO/CR was investigated by X-ray diffraction (XRD)using = 0.1542 nm and 2 values started from 10 to 80. In addition the structural properties of ZnO and ZnO/CR were analyzed by Shimadzu FTIR spectrometer (from400 to 4000 cm-1) at room temperature. pH values measured by pH meter…

Martha Chase was an American Geneticist who was born in Cleveland, Ohio and was famously known for her and her ally Alfred Day Hershey’s landmark experiment in genetics proving that DNA is genetic material. Her experiment was using radioactive tracers to mark the DNA core and the protein coat of a phage called bacteriophage, or bacterial virus. Her and Alfred placed the material into a blender and turned on the switch which resulted in the scientists discovering that the blender had separated…

Geometry and Eratosthenes In Professor Russ physical science class, there’s a plethora of subjects you, as a student, are bound to cover. This semester we had discuss over twenty different fields of science; the first being Geometry and Eratosthenes computing circumference of earth. We started the final semester off with two worksheets. The first was the “Angles of a Triangle”, we had to cut out the three angles of the triangle and piece them together in a shape. The three angles form a…

Introduction: Limonene is a terpene that can be isolated from orange peels almost 100% in the (R)-(+)-limonene form. The essential oil from the orange peel belongs to terpenes, which are compounds that are made up of two or more five carbon units, named isoprene.1 The limonene is a monoterpene, which means it is made up of two isoprene units. Natural products are related compounds formally derived from isoprene units are terpenoids.3 The skeleton of terpenoids may differ from strict additivity…

Pesticides, chemical compounds used to kill of unwanted plants, bugs, fungi and animals, yet wildlife and the human race have fell victim to highly toxic chemicals. It is estimated nearly 20,000 people annually receive emergency care for an actual or suspected pesticide poisoning, and approximately ten percent of them are admitted to the hospital. People are putting themselves at risk every time they decide to consume conventionally grown foods -foods that are grown with an immense amount of…

What is Fiber Optic Cables? Back in the day we used copper wires for our tele-communication and to interconnect throughout the world. However as technology and machines start to grow more powerful, we are forced to put a change in this production of copper wires. The wire density becomes a very critical factor in the modern era, however the limit in size must always result in better performance. Fiber optics proves to be highly effective in its high bandwidth, as it allows on a single fiber to…

phosphorus are in tetrahedral coordination to oxygen. All of the iron and the phosphate are in tetrahedral coordinates. It also has a very open structure and has a lot of empty spaces. This means that as the temperature changes by neutron powder diffraction, the structure of the molecules would either expand or compress – the higher the temperature, the more the FePO4 will expand and vice versa. Hence, when looking at it at the right direction, hexagonal tunnels can be seen. The hexagonal…

3 RESULTS AND DISCUSSION 3.1 Water demand and workability of M-S-H binder system 3.1.1 Optimization of superplasticizer M-S-H binder contains high content of very fine silica fume particles and therefore requires much higher water demand than Portland cement (PC) for workability (Zhang et al (2009)). Also, the reactive magnesium oxide particles were found to have cells lattice structure and therefore require higher water demand than PC (Eubank, 1951). For those reasons, tests with…

BIOL 1010 ‐ Biotechnology and Society Assignment #1 The Carleton Prize for Biotechnology Saifullah Haji Mohammad Eessa (100965270) October 06, 2015 Carleton University Introduction The group I would like to nominate for The ‘Carleton Prize for Biotechnology’ is comprised of three well-known scientists, James Dewey Watson, an American geneticist; Francis Crick, a British molecular biologist, and Maurice Wilkins, an English physicist and molecular biologist. The three worked…

INTRODUCTION Background The macrocyclic organic molecules Phthalocyanines (1) which are comparable to the naturally occurring porphyrin (2) ring systems shown in (Figure 1). The porphyrin molecule consists up of four pyrrole subunits which are associated in n-conjugation by methine carbons. 1 2 Figure 1: structures of phthalocyanine and porphyrins molcule The compound…