Temperature‚ moisture‚ soil type‚ microbial activity‚ oxygen concentration‚ sunlight‚ nitrification‚ and the amount of leaching all have an effect on the breakdown of pesticides in the soil (Extoxnet‚ 2000a). Rainfall patterns and the timing/intensity of irrigation in relation to high rainfall intensities will also influence herbicide movement in or from soil. Metolachlor is considered to be moderately persistent in different soil types (U.S. EPA‚ 1997)‚ and has an average field dissipation half-life
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and hydrophilic (water hating) and the carboxylate end is polar and hydrophilic (water loving). This the property which allows it to clean‚ it acts as an emulsifying agent. The soap disperses in water to form miscelles where a negatively charged surface is formed and hydrocarbon chains are in the centre. These miscelles surround
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help us understand better the role of surfactant in the alveolar system. Surfactant is a detergent-like substance produced by the Type II alveolar cells in the alveoli. Surfactant is produced to make it easier for people to breath by reducing the surface tension of the water molecules that primarily compose the walls of the alveoli; it helps them to not stick together. For this experiment‚ we will be using milk and food coloring to represent the water (milk) and gas (food coloring) in the respiratory
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Internal Assessment IB Physics-7 Mr. Parent 14 January 2012 I. Design • Purpose: o To determine how the surface area of a coffee filter affects the average velocity of the coffee filter from the same height. • Variables: o Independent Variable ▪ Surface area- The area of the surface after the folds have been made o Dependent Variable ▪ The Average velocity- calculated by measuring the time and dividing by
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GENTLY drop the tissue flat onto the surface of the water GENTLY place a dry paper clip flat onto the tissue (try not to touch the water or the tissue) Use the eraser end of the pencil to carefully poke the tissue (not the paper clip) until the tissue sinks. With some luck‚ the tissue will sink and leave the paper clip floating! How is this possible? With a little thing we scientists call SURFACE TENSION. Basically it means that there is a sort of skin on the surface of water where the water molecules
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potato Peanut butter Soft drinks Chocolate coatings Caramels Emulsifiers are molecules that have two distinct ends. One end likes to be in water (hydrophilic) and the other end likes to be in oil (lipophilic). This means that they will coat the surface of oil droplets in an oil-in-water emulsion and effectively ’insulate’ the oil droplets from the water. It keeps them evenly dispersed throughout the emulsion and stops them from clumping together to form their own‚ separate layer. In a water-in-oil
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1 Population growth and urban problem in Mumbai‚ India According to G.Tyler(1994)‚ the more poor people move from rural to urban area the more poverty is becoming urbanized. A lot of cities have damage because of the extreme poverty and social and environment in stead of being centers of commerce and industry. In this article I will discuss the problem of slum clearance in Mumbai‚ India. I am interested in poor people in urban area. First I will refer about population growth which is related
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Darlene Garcia GEO 151 Prof. Denyse Lemaire WA1 Feb. 2010 1. What are the relationships among Earth’s mantle‚ crust‚ asthenosphere‚ and lithosphere? The core is divided into three major compositional layers. The crust on Earth’s surface‚ the rocky mantle beneath the crust and the metallic core which is the center of the Earth. While distinct and separate parts of Earth‚ they are all interconnected. The metallic inner core is solid‚ surrounded by a liquid (molten) outer core. Most of
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tributaries joining the river called second and third order segments as the river moves downstream. These tributaries can have water coming from smaller bodies of water such as streams and brooks. Furthermore more water can be added to the river with surface
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make water unsuited for the desired use. The main cause of water pollution is made by humans. Point and non point sources are the two sorts of sources. Point sources discharge pollutants at specific locations such as pipelines or sewers into the surface water. Non point sources are sources which can not be traced to a single site of discharge. Factories‚ sewage‚ underground mines‚ as well as tankers are examples of point sources. Acid‚ deposition for the air‚ traffic as well as pollutants spread
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