Crystal structure

By measuring out two grams of our unknown, and heating it up until the difference of the mass of the test tube and the anhydrous residue subtracted to 0.002g, we were able to calculate the percent water in the two possible unknowns, and then our unknown, to figure out which unknown we were given. Since our percent water was 44.9%, we concluded that our unknown is Zinc Sulfate. A possible error as to why our calculated percent water was not exact to the theoretical percent water was most likely…

Two dimensional (2D) crystals such as graphene and hexagonal boron nitride have been considered only recently. Imperfection in graphene can be due to different methods of production, chemical treatment and irradiation [Ref]. It is always known that defects are not stationary and that their migration can have an important influence on the properties of a defective crystal [Ref]. In graphene, each defect has certain mobility parallel to the graphene…

high strength, stiffness, good toughness, low thickness, and excellent corrosion resistance, provided by various titanium alloys at very low to temperately elevated temperatures, allows weight savings in specific strength-efficient structures (e.g. aerospace structures ) and corrosion-resistant…

EXERCISE PARAGRAPH I FePO4 is a type of -quartz, and when the temperature is relatively low, FePO4 still has the tetrahedral structure as seen in Figure 1. The Fe-O-P bridging angles are more similar between the FePO4 and -quartz. Change in the cell parameters become more significant between temperatures of 294K and 1073K, and it slowly acquires an octahedral structure as the temperature increases. When temperature reaches 980K, the compound transitions and the tilt angles decrease rapidly at…

The formulations with the highest protein content were formulated without emulsifier (F2) and without chantilly (F3). Proteins greatly contribute to the development o the ice cream structure, including emulsification and water retention capcity. This ability of water retention of proteins leads to increased viscosity (KINSELLA, 1984), which benefits the body of the ice cream, increasing the melting time of the ice cream and contributinf…

It was determined that the rate of freezing has a major effect on the size of ice crystals and the quality, texture, and nutritional and sensory properties of many foods. During slow freezing, ice crystals can grow to a large size, whereas during fast freezing a large number of ice crystals start forming at once and are much smaller in size. Large ice crystals are not desirable since they can puncture the walls the cells, causing a degradation of texture and a loss of…

This enables the necessary counts or scintillation events required for image formation to be obtained in less time when LSO crystals are used, thereby significantly decreasing the scanning time and increasing patient through¬put. GSO has a lower effective atomic number than BGO and LSO crystals. GSO crys¬tals emit slightly more light than BGO and have a decay time of approximately 50…

mixture but sometimes other types of sweeteners are also added. Sometimes artificial colourings and flavorings are also added to bring out different flavours. The ingredients mixed properly are stirred well for incorporating air and to prevent ice crystals, thus forming smoothly textured semi solid foam which can shaped into different shapes. There are different types of frozen desserts that comes under the term ice cream like Dairy ice cream, Gelato,…

an earth quake occurred around the Santa Cruz bay area. The Cypress Street Viaduct was the first double-decker viaduct in California and it was made in 1955 – 1957 and it cost 100 million dollars. On October 17, 1989, the southern portion of the structure collapsed during the 1989 Loma Prieta Earthquake, due to ground movement and structural flaws. When in use, the upper and lower tier were both in use. Some sections of the Cypress Street Viaduct were largely supported by two columns on either…

plastics and rubbers. These are modified heavily to produce desirable properties. Polymers have low electrical and thermal conductivities. Polymers are softer, less dense and more corrosion resistant than metals. Elastomers are polymers that have a structure that allow large extensions that are reversible such as rubber bands. Destructive and non-destructive testing methods Destructive tests destroy the test piece. Eg. An impact test on a motor vehicle. Non-destructive test allow the test…