Chemistry Essay Examples

Perfusionist

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chemistry, math physiology, and anatomy. During the program, the student will undergo some training that includes monitoring patients using a heart-lung machine, heart surgery, and heart-lung bypass. During the training, the student must complete at least 75 surgical procedures (Brown 123). This is necessary to enable them to be able to handle different situations that may emerge in the operation room. Certification or licensing for perfusionist is not something that the State has put a lot of emphases, though it is slowly becoming a requirement. Today, more than seventy percent of perfusionist are licensed all over the nation. In the state of New Jersey, perfusionists need to be licensed before...

Chemistry Council, 76% of Americans throw away food leftovers every day. Besides, judging from the statistics of the leftovers thrown away and the percentage of people who throw away food each day, one would be curious to know the perception of Americans themselves. The available news indicates that significant number, 15%, of the Americans are mainly concerned about the environmental problems that are caused by this wastage as they end up in landfills and they end up becoming a major cause of environmental pollution (Snyder, 2015). It is clear from this point of view that most people who throw away are not concerned about the resources wasted but how they are affecting their environment. However,...

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chemistry, oceanography, physics and biology. Nansen was trying to solve the problem of ships submerging in the ocean. He became interested the scientific observations that had been made by the challenger expedition and he further wanted to ease the sled journey they had towards the North Pole. He wanted to describe the general characteristics of the polar region covered with ice that could trap the voyages. Scientific methods such as carbon dating have been used to estimate the age of the earth. Biblical accounts have also played a significant role in gauging and estimating the age of the earth. The ever-changing estimates of the earth’s age are due to changes in some processes like sea...

chemistry and engineering: Approaches from sustainable resource and energy use, management, and transformation." Journal of Cleaner Production 172 (2018): 227-232. Nosonovsky, Michael, and Bharat Bhushan. "Superhydrophobic surfaces and emerging applications: non-adhesion, energy, green engineering." Current Opinion in Colloid & Interface Science 14.4 (2009): 270-280. Tang, Samantha Y., et al. "The 24 principles of green engineering and green chemistry: “IMPROVEMENTS PRODUCTIVELY”." Green Chemistry 10.3 (2008):...

chemistry, biology, and physics. As opposed to the application of single research design, experimental studies encompass a collection of strategies that utilize both controlled testing and manipulation to understand underlying courses. Typically, researchers manipulate one or more variables to establish their impact on the dependent variable. On the other hand, researchers can neither control nor manipulate the predictor variable. They usually rely on observations, interactions, or interpretations to draw their conclusions. Non-experimental researchers typically depend on case studies, correlations, or surveys. Therefore, they cannot establish an actual cause-and-effect connection. Since...

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Chemistry, Dietary Sources, and Health Effects. New York: Nova Science Publishers, Inc. Watson, R. R. (2013). Handbook of vitamin D in human health: Prevention, treatment, and toxicity. Wageningen: Wageningen Academic...

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chemistry. The natural development of urine chemistry leading to stone development is urine saturation, urine supersaturation, crystal nucleation, aggregation, the retaining of crystals by the urothelium and the constant progression of the stone on the retained crystals. Supersaturation occurs when the absorption of salt components rises further than the saturation level. The solution is termed to be thermodynamically unstable. Supersaturation leads to nucleation, which is a process that is controlled by the thermodynamic free energy of the solution. The process of nucleation leads to the decrease of excess free energy to a more thermodynamically steady environment. According to Tiselius et al....

chemistry of hydrophobic interactions (HI) and how they are affected by both free and immobilized ions. Applying an experimental approach and modeling techniques, the authors note that free ions (in the form of free salts) cause changes in water density, particularly near the nonpolar molecular surface thereby affecting HI. In addition, it is noted that immobilized ions affect HI through changes in spatial arrangements and ionic sizes. In essence, the article illustrated that while immobilized ions (particularly univalent proximal anions) weaken HI, free ions strengths the interactions. Other than the effect on the interactions, it is noted that while free ions observe the Hofmeister-like ranking...

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Chemistry Green chemistry refers to the intentional use of tools developed from chemical interactions to protect the environment and reduce carbon emissions through the development of energy efficient systems. This is seen in Carnot’s theory on entropy, which intones that energy must flow in a particular direction for work to be done. For instance, at the top of a waterfall, the water has high potential energy, but low kinetic energy. As the water drops down the waterfall, its kinetic energy increases even as the potential energy reduces. As a result, potential energy is turned into kinetic energy. The transition from low-kinetic energy and high-potential energy to high-kinetic energy and...