Abstract Phthalates are a group of chemicals used to soften and increase the flexibility of plastic and vinyl, and are used in hundreds of consumer products. They are not chemically bound to products and are, therefore, released into the environment where they may enter the human body by ingestion, inhalation, or dermal absorption. This study is focused on the presence, distribution, and concentration of plasticizers particularly phthalates in the San Juan Bay Estuary of Puerto Rico. This estuarine ecosystem is enclosed in the San Juan-Carolina Metropolitan area. A comparison of pollutants fo...

• Word Count: 3138
• Approx Pages: 13
• Has Bibliography
• Grade Level: Undergraduate

ALALC ended in the 1970's due to these negotiations because they were left to the discretion of the countries involved and unfair practices started to occur. ... On the attached graph, as the price level drops from A to B, the quantity demanded increases from C to D; it becomes less expensive for U.S. firms to supply goods to Canada and Mexico as the supply curve shifts from AS to AS'. ...

• Word Count: 3714
• Approx Pages: 15
• Grade Level: Undergraduate

While researching texts written about Main-memory Database Systems, I found few materials, particularly journals, blogs, pamphlets, and brochures. My goal in this paper is to bring the main memory discussion starting from the basic definition. To achieve this goal, I have organized my paper into fou...

• Word Count: 2524
• Approx Pages: 10
• Has Bibliography
• Grade Level: Undergraduate

Four years ago, my Uncle Creighton was diagnosed with a rare blood disease called multiple myeloma, which is a cancer affecting plasma cells. With no available treatment for his unfamiliar disease in Chicago, Creighton moved to Houston to undergo an experimental stem-cell procedure that saved his li...

• Word Count: 2542
• Approx Pages: 10
• Grade Level: Undergraduate

" The following graph (Figure 1) provides a detailed representation: Figure 1. ... Comparing the prohibition of marijuana today to the prohibition of alcohol during the 1920's, proponents for legalization make the claim that if the drug were legalized, taxes could be levied on it in the same way they are on alcohol, thereby increasing tax revenue. ...

• Word Count: 4020
• Approx Pages: 16
• Has Bibliography
• Grade Level: Undergraduate