High Oil and Gas Prices Research Paper Example | Topics and Well Written Essays - 250 words

High Oil and Gas Prices - Research Paper Example Global oil consumption has been another main reason (Millender-McDonald 1). China being one of the leading oil importing countries has added to the global oil demand by its continuous progress. The automobile industry in the United States has also added to the global oil consumption as it consumes around one-fourth of the total global oil. So is the case with US chemical industry (Liveris 1). The surge in oil demand has resulted because of low interest rates all over the world. Moreover, investors invest in oil business so as to minimize the risk of devaluation of their other businesses because when oil prices rise, the cost of all investments and businesses also rise (crack spread) which results in greater revenues and profits, and this makes the oil prices go up (Overdahl 3). Unfortunate events, like Hurrican Katrina and Rita, also caused oil prices to rise (Matthews 1). Jeffords, James M. â€Å"Clean Air Regulations and Natural Gas Prices.† Congressional Testimony,. MAS Ultra - School Edition, 2006. Web. 16 Sep 2011. . Liveris, Andrew. â€Å"Natural Gas Supply and Prices.† FDCH Congressional Testimony. MAS Ultra - School Edition, 2005. Web. 16 Sep 2011. . Matthews, Dan. â€Å"Mitigating Impact of High Gas Prices.† FDCH Congressional Testimony. MAS Ultra - School Edition, 2005. Web. 16 Sep 2011. . Millender-McDonald, Juanita. â€Å"Effect of High Natural Gas Prices on Small Businesses.† FDCH Congressional Testimony. MAS Ultra - School Edition, 2006. Web. 16 Sep 2011. . Overdahl, James A. (2005). â€Å"Rising gasoline Prices.† FDCH Congressional

Photosensitizer Essay Example | Topics and Well Written Essays - 3000 words

Photosensitizer - Essay Example The most imperative aspect of this therapy is nontoxic nature of photosensitizers. Production of singlet oxygen is of paramount significance therefore, agents promoting the formation of singlet oxygen as well as two photons absorption are considered to be highly efficient in the therapy. Numerous receptor molecules are over-expressed in tumor cells which are of considerable importance. Peptides recognizing these receptors are conjugated with photosensitizers to reach the target cells. However, after a certain interval when photosensitizers in normal cells degenerate, the tumor cells are exposed to a particular wavelength of light which cause the excitation of the photosensitizer resulting in the formation of cytotoxic singlet oxygen. This oxygen is very reactive and cause cytotoxicity of the diseased or cancerous cells. The phenomenon is exploited in photodynamic therapy to eliminate the side-effects imposed by other cancer therapeutic measures. Photosensitizer or photosensitizing agent is a molecule or a drug that is capable of producing a chemical alteration in another molecule or cell during the photochemical process. Photosensitizers, when exposed to a particular wavelength of light. Photosensitizers generate a form of cytotoxic oxygen that can kill the adjoining cells in the living organism. This property of photosensitizers is exploited to treat numerous superficial and localized cancers together with certain noncancerous conditions (Lau et al, 2014). Photosensitizers are involved in medical science under the name photodynamic therapy or phototherapy, as the therapy involves insertion of certain light sensitive non-toxic chemical agents called photosensitizers, it is also known as photochemotherapy. As long as photosensitizers are not exposed to light they remain non-toxic, in the presence of certain wavelength of light they generate cytotoxic oxygen which can destroy, cancerous cells as well as other contaminated cells including