Gateways free essay sample

There are people everywhere. Some are sitting idly while others are rushing to catch their flight. Even more are in line so that they may finally leave the bustling airport and fly away to their next destination. Overhead the intercom consistently blares out announcements. Young children play beneath peoples feet as their parents try to keep them in check. Outside the bustle of the terminal, anxious friends, parents, and relatives look to greet their loves ones as those around them search for a lost bag. An airport is a gateway. It is a means of returning home from a long voyage or a way to a greater education in school. Most importantly it is a gate to the unknown and to the exploration of the world. Every which way planes take off from the airport traveling to every corner of the earth. I have often been aboard these numerous planes. We will write a custom essay sample on Gateways or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Back and forth I travel across the United States for school, ice hockey, and family vacations. Among the hustle and bustle of people traveling across the world I find those that I love and are the most important in my life waiting for me. Today the airport is a gateway to my numerous homes at school and with my family. In the future it will be something different. From the airport I will embark on adventures, living my dreams to travel and see the world. I will leave behind the lines and luggage as I board a plane headed towards the unknown. The airport is my gateway to the world and I will go through it to explore what I have yet to discover.

The Chemical Composition of Wood Smoke

The Chemical Composition of Wood Smoke Smoke is something that we will deal with all throughout our lives, in everyday situations as well as in emergencies. But not all smoke is the same in fact, the smoke will vary depending upon what is being burned. So then what, exactly, is smoke made of? Smoke consists of gasses and airborne particles produced as a result of combustion or burning. The specific chemicals depend on the fuel used to produce the fire. Here is a look as some of the principal chemicals produced from wood smoke. Keep in mind, there are thousands of chemicals in smoke so the chemical composition of smoke is extremely complex. Chemicals in Smoke In addition to the chemicals listed in the table, wood smoke also contains a large amount of unreacted air, carbon dioxide, and water. It contains a variable amount of mold spores. VOCs are volatile organic compounds. Aldehydes found in wood smoke include formaldehyde, acrolein, propionaldehyde, butyraldehyde, acetaldehyde, and furfural. Alkyl benzenes found in wood smoke include toluene. Oxygenated monoaromatics include guaiacol, phenol, syringol and catechol. Numerous PAHs or polycyclic aromatic hydrocarbons are found in smoke. Many trace elements are released. Reference: 1993 EPA Report, A Summary of the Emissions Characterization and Noncancer Respiratory Effects of Wood Smoke, EPA-453/R-93-036 Chemical Composition of Wood Smoke Chemical g/kg Wood carbon monoxide 80-370 methane 14-25 VOCs* (C2-C7) 7-27 aldehydes 0.6-5.4 substituted furans 0.15-1.7 benzene 0.6-4.0 alkyl benzenes 1-6 acetic acid 1.8-2.4 formic acid 0.06-0.08 nitrogen oxides 0.2-0.9 sulfur dioxide 0.16-0.24 methyl chloride 0.01-0.04 napthalene 0.24-1.6 substituted napthalenes 0.3-2.1 oxygenated monoaromatics 1-7 total particle mass 7-30 particulate organic carbon 2-20 oxygenated PAHs 0.15-1 Individual PAHs 10-5-10-2 chlorinated dioxins 1x10-5-4x10-5 normal alkanes (C24-C30) 1x10-3-6x10-3 sodium 3x10-3-2.8x10-2 magnesium 2x10-4-3x10-3 aluminum 1x10-4-2.4x10-2 silicon 3x10-4-3.1x10-2 sulfur 1x10-3-2.9x10-2 chlorine 7x10-4-2.1x10-2 potassium 3x10-3-8.6x10-2 calcium 9x10-4-1.8x10-2 titanium 4x10-5-3x10-3 vanadium 2x10-5-4x10-3 chromium 2x10-5-3x10-3 manganese 7x10-5-4x10-3 iron 3x10-4-5x10-3 nickel 1x10-6-1x10-3 copper 2x10-4-9x10-4 zinc 7x10-4-8x10-3 bromine 7x10-5-9x10-4 lead 1x10-4-3x10-3

Development of Sexual Orientation Research Paper

Development of Sexual Orientation - Research Paper Example The main influences of nature (genes and biology) and nurture (the surrounding where an individual develops) and certain orientations are the main issues in the psychological world. This paper will investigate the main factors behind the development of varying sexual orientations, developmental differences between men and women, and the key factors for persistence of varying sexual orientations in humans throughout evolutionary history. Discussion Evidence indicates that different factors account for the development of different sexual orientations for various people, (Diamant & McAnulty, 2005). Diamante and McAnulty asserts that â€Å"Even though various studies have investigated the potential hereditary (genes), developmental, hormones and socio-cultural factors influence the development of sexual orientation† p. 33, no generalizations have developed to allow scientists and theorists to construe that sexual orientation development is attributable to any certain factor(s). La rge numbers of scientist suggest that both â€Å"nature and nurture play a dynamic function; a large percentage of the population experience little evidence and choice concerning their sexual identity and orientation† (Diamant & McAnulty, 2005 p. 40). In the sexual orientation debate, different individual narratives and evidence have validity for the person, but cannot be simplified broadly. Sexual orientation is largely influenced by genes and unsystematic environmental aspects, based on results from the global extensive twin's study, (Omoto & Kurtzman, 2006). Sexual orientation is attributable to biological factors. The biological account has extensively gained recognition amongst the scientific society even the though; it is merely anchored on speculations. Scientists argue â€Å"Development of sexual orientation is attributable to factors that the take place during sexual identity of differentiation† p. 52. The prenatal subjection hormones such as androgens and the impacts on human brain development perform a crucial function development of sexual orientation in humans.        Ã‚