process of molecules moving from areas of high concentration to low concentration‚ thus requiring no energy. Many of the substances that enter or leave the cell do so through diffusion. Osmosis‚ a type of diffusion‚ is the movement of water across a selectively permeable membrane. In osmosis‚ water diffuses across the area of lower solute concentration to that of higher solute concentration until the solute concentrations of the environment and the cell are equal. Tonicity‚ which is the ability of
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Effect of optimized EGR on fuel consumption Abstract: In recent years‚ more stringent requirements on performance‚ fuel economy and emissions have led to increasingly complicated engine configurations. This paper is a study into the potential benefits of an EGR MAP optimization for low fuel consumption and lower mass emission. Introduction: The narrower environmental restrictions are the current challenge that Diesel engine manufacturers are facing in the last years. The demand on cleaner
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MGH Evoked Potential Normative Values Pattern Shift Visual Evoked Potentials P 100 Latency (msec) Inter-eye difference (msec) P 100 Amplitude (µV) P 100 Amplitude % difference Mean 102.3 1.3 10.1 85.5% SD 5.1 2 4.2 10.50% Mean + 3 SD 117.6 7.3 N/A Notes (Smallest/Largest) 53.9% X 100 Brainstem Auditory Evoked Potentials Latencies (msec) I II III IV V VI Inter-wave latencies (msec) I-III I-V III-IV III-V IV-V V-VI Mean 1.7 2.8 3.9 5.1 5.7 7.3 SD 0.15 0.17 0.19 0.24
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of natural resources - the possibility and feasibility of their involvement in the production at the present level of science and technology development To do the economic evaluation‚ one needs to define the following: stock size and concentration per unit area; qualitative composition; proportion of mineral elements; occurrence and exploitation; costs of production (output) per unit of output; development and settlement of the territory where the
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Resting potential is created by a transport protein called the sodium-potassium pump. Resting potential occurs when ions are distributed unequally on the inside and outside of cells‚ and when cell membranes are selectively permeable to different ions. K+ is particularly important for the resting potential. The membrane is highly permeable to K+. In addition‚ the inside of the cell has a high concentration of K+ and the outside of the cell has a low concentration of K+. K+ will naturally diffuse
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The cell phone has completely changed the way that the world lives.” We live in a world of different technologies‚ but the cell phone seems to have the biggest impact on peoples’ life today. We use newer cell phones and updates daily. Cell phones have changes drastically since the very first cell phone was invented in 1983. Although some people think cell phones updates have not affected them‚ it honestly has by having different prices of the cell phone‚ having new appearances’ of the cell phone
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have a huge impact on the communication between cells. Cell communication is a crucial process necessary for cells to carry out various functions. Drugs such as Methylenedioxymethamphetamine (MDMA)‚ known as ecstasy‚ can create barriers or confusion to cells. Cell to cell communication carry messages from signaling cells to target cells. Usually a cell will bind with a target cell through a receptor protein in the plasma membrane of the target cell
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Lab activity 1: Effect of temperature‚ concentration‚ and pressure on equilibrium Introduction Our ongoing discussion has been on systems at dynamic equilibrium: for a reversible reaction‚ the rate of the forward reaction is equal to the rate of the reverse reaction. What happens if equilibrium is disturbed? In this lab activity‚ we are going to examine the effect of changing reaction conditions on the position of equilibrium. Part I: Effect of temperature We will consider the equilibrium
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flask using a volumetric pipette. The volumetric flask was then filled to the mark with distilled water. The flask was covered with Parafilm and inverted to mix. The next part of the experiment was to determine the Vitamin C in a solution of known concentration. Observations of the Vitamin C sample and the amount found on the label was recorded. A tared piece of weighing paper was used to weigh 0.27 g of Vitamin C. The Vitamin C was then transferred to a clean 50 mL volumetric flask. The flask was filled
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because water is less dense than rock. | | | Tides are caused by the 23 1/2° tilt of the earth’s rotational axis to the ecliptic plane. | | | Tides are caused primarily by the gravitational force of the Sun. | | | Tides are caused by the difference in the force of gravity exerted by the Moon across the sphere of the earth. | | | Tides are caused on the side of the earth nearest the Moon because the Moon’s gravity attracts the water. | | | | | | Question 6 | 1.61
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