Mason University Angelos Stavrou George Mason University Brent ByungHoon Kang George Mason University Abstract—Internet services and applications have become an inextricable part of daily life‚ enabling communication and the management of personal information from anywhere. To accommodate this increase in application and data complexity‚ web services have moved to a multi-tiered design wherein the web server runs the application front-end logic and data is outsourced to a database or file server. In
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determine the stress that various alcohols have on biological membranes. Membranes within cells are composed mainly of lipids and proteins and often serve to help maintain order within a cell by containing cellular materials. Different membranes have a variety of specific functions. One type of membrane-bound vacuole found in plant cells‚ the tonoplast‚ is quite large and usually contains water. In beet plants‚ this membrane-bound vacuole also contains a watersoluble red pigment‚ betacyanin‚ that
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1. There are many variables that a hospital needs to consider in layout design. First‚ there should be enough rooms and equipment like hospital beds for the patients and their visitor. The visitors of the patients must have enough space to stay or wait for their love ones. The efficiency of meals and supplies delivery is also taken into account‚ it should be delivered warm and on time. Secondly‚ the layout should provide enough space for information to flow fluently from the doctors to the nurses
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Carbohydrates have two major functions in plants and animals: they serve as fuel and building material. Plants store most of their energy in the form of starch. Starch is a polysaccharide (consisting of several conjoined sugars). Synthesizing starch enables the plant to stockpile surplus glucose‚ and since glucose is a major cellular fuel‚ starch represents stored energy. The sugar can later be withdrawn by hydrolysis‚ which breaks the bonds between monomers. Animals‚ in turn‚ have enzymes that
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DNA replication: DNA replication is a biological process that occurs in all living organisms and copies their DNA; it is the basis for biological inheritance. The process starts when one double-stranded DNA molecule produces two identical copies of the molecule. The cell cycle (mitosis) also pertains to the DNA replication/reproduction process. The cell cycle includes interphase‚ prophase‚ metaphase‚ anaphase‚ and telophase. Each strand of the original double-stranded DNA molecule serves as template
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EXERCISE 7 - Rotational Kinematics and circular motion 1. A wheel has a radius of 4.1 m. How far (path length) does a point on the circumference travel if the wheel is rotated through angles of 30°‚ 30 rad‚ and 30 rev‚ respectively? 2.1m‚ 1.2x102 m‚ 7.7. x102m 2. A centrifuge in a medical laboratory rotates at an angular speed of 3 600 rev/min. When switched off‚ it rotates through 50.0 revolutions before coming to rest. Find
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DNA Deoxyribonucleic acid DNA Deoxyribonucleic acid DNA is a nucleic acid that is basis of genetic information. It is like a set of instructions for our bodies and genetic codes. DNA has many different components that make it up such as hydrogen‚ oxygen‚ nitrogen‚ and phospurous. The structure has two long polymers of a simple unit called nucleotides. Holding the back of the structure is sugar and phosphate which are attached by ester bonds. Bonded to each sugar is 4 different types
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Do different brands of deodorants contain different amounts of aluminum? Thus‚ how can we stay on the safe side and use the least amount of aluminum possible. Why do deodorants with a greater amount of aluminum cause a more serious threat than ones with a smaller amount? Hypotheses The aluminum content in each of the deodorants will vary where the deodorants Axe and Citymen contain more aluminum then Nivea. By using Nivea‚ in the long term a person will be safer due to lower amounts of aluminum
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DNA extraction lab 1. A number of steps are required to isolate DNA from cellular content. Describe what happens at each step‚ and why it acts to separate the parts of the cell. The steps include a) breaking cell open to release the DNA; b) separating the DNA from cellar materials and proteins; c) using alcohol to precipitate the DNA; d) cleaning the DNA; e) confirming the presence of the DNA. a) Breaking cell open to release the DNA: the cells are separated from each other by physical means such
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permeability of the cell membrane: The question being answered from doing this experiment is ‘How do different temperatures affect the permeability of the plasma membrane of beetroot?’ Beetroot contains red pigments called betalains‚ located within the cell vacuole. Normally the pigments cannot pass through membranes but they leak out when the beetroot is cooked or placed in alcohol. The aim of this practical is to use beetroot to examine the effect of temperature on cell membranes and relate the effects
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