football safely tucked in his hand. Other players were charging at him‚ with a killer look in their eyes. But the boy only ran faster. He ran like there was no tomorrow‚ until he slipped on a rock that somehow got onto the field. The boy was falling. He hit his head on the field‚ the impact crushing his helmet. The crack of his skull echoed throughout the stadium. The boy was dead. He was one among the estimated 53‚000 people that die from traumatic brain injuries every year. Involvement in sports and
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Computer Simulation of Cell Transport Mechanisms and Permeability: Passive Processes and Active Processes Introduction In this lab we will establish a difference between the two types of cell transport mechanisms and their permeability. The first type of cell transport is passive processes which are driven by concentration or pressure differences in the interior and exterior of the cell. The second type is active processes which use energy known as ATP to power the transport. There are two
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Aim: This experiment aims to determine what effect an increase in the surrounding temperature has on the plasma membrane of a typical plant cell structure. Hypothesis: An increase in temperature will damage and denature the plasma membrane and cause the cytoplasm and other substances contained within the membrane to leak out. Introduction: The purpose of a cell membrane is to control the transport of substances moving into and out of a cell. The membrane is an extremely thin layer (8 to 10 manometers
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control group had a concentration of betacyanin of 0.09 µM while the -5⁰C test tube had a concentration of 23.5 µM‚ around 260 times more betacyanin leakage. Which suggests that there has been severe damage to the plasma membrane rendering it unable to perform its main function of being a selective barrier (Reece et al. 2011) leading to the flow of betacyanin out of the cell. While the concentration of betacyanin present in the test tube exposed to 40⁰C water was 1.13‚ the difference in concentrations
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“Ishmael……. Understood this too: that accident ruled every corner of the universe except the chambers of the human heart” explain the importance of this as the conclusion of the novel The text concludes with two summations. Firstly‚ that human hearts are unknowable‚ therefore one can never fully know another’s hearts desires. Secondly “accident ruled every corner of the universe”‚ thus we can never fully control what we are going to do as fate has a way of disrupting our plans. This is contrasted
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Langston Hughes’ poem‚ "Mother to Son" is reminiscent of the well-known expression "let’s have a father to son chat"; however‚ in this case‚ the saying is altered to "mother to son." One may ask‚ "so where is the father"." Possibly‚ this is one of the many struggles that the "son" in this poem must face when the mother is compelled to offer her sage advice. The advice and consequently theme of the poem is determination and courage‚ in particular when confronting the uphill battle of life. Poetic
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The Silver Lake Sand Dunes are a natural phenomenon that attracts more than a million visitors to western Michigan each year. Sand‚ sun and fun await you at the Silver Lake Sand Dunes nestled between the shores of Lake Michigan and Silver Lake in Oceana County. Tourism in this area dates back to the early 1920’s. At that time people usually travelled by train to the station located in Mears‚ Michigan. From there visitors and their trunks would be brought to the lake by horse and buggy. The area
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In this Laboratory experiment‚ my lab partner Alexander and I were able to understand thoroughly the physical and chemical properties of salt (NaCl) and sand (SiO2). Followed by the right procedure we were able to design and test out the components of both NaCl and SiO2 in order to separate the unknown mixture that we were able to find out about. We were also given the task to provide the percent composition of the mixtures. Therefore‚ the separation of components among this experiment allowed us
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OUTHEAST ASIAN J T ROP MED P UBLIC H EALTH ANTI-HEAD LICE EFFECT OF ANNONA SQUAMOSA SEEDS Junya Intaranongpai 1‚ Warinthorn Chavasiri 2 and Wandee Gritsanapan 1 1 Department of Pharmacognosy‚ Faculty of Pharmacy‚ Mahidol University‚ Bangkok; Department of Chemistry‚ Faculty of Science‚ Chulalongkorn University‚ Bangkok‚ Thailand 2 Abstract. The present study focused on the separation and identification of the active compounds against head lice from the hexane extract of Annona squamosa L
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The Felis margarita‚ most commonly know as the Sand cat or the Sand dune cat‚ is a small‚ stocky‚ endangered feline. Its legs are relatively short and its tail is longer than average. Their fur is a pale sandy ocherous color with black and white markings differing between each individual. A broad head with pointy ears is an unique distinguishing factor of these desert hunters. (1) Sand cats are primarily found in true deserts‚ such as northern Africa and southwest/central Asia. Although there have
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