... reacts to these conditions, clearly showing that the physiological and chemical responses surrounding love are linked to our brain chemistry (Thims, 2007). Evolutionary psychologists contend that love is in fact tied to our biological constitution and is linked to a chemical reaction within our limbic system of the brain. Although primates and other animals have developed love, Helen Fisher, a ... p. 60). Fisher thus asserts that love is simply a mechanism of our nature and therefore a biological component, one of which we have no choice or control over. Biology and brain chemistry asi...

• Word Count: 1701
• Approx Pages: 7
• Has Bibliography
• Grade Level: Undergraduate

... and radiation biologists believed that mutations in the nuclear DNA caused aging in humans. However, this was later deemed unlikely because of the numerous repair mechanisms and in turn the relative immutability for nuclear DNA (Life Extension, 1). Later on in the 1960's, a man named Denham Harman proposed his ... by free oxygen radicals, or molecules with Oxygen with a highly reactive unpaired electron. The formation of oxygen free radicals is a matter of basic chemistry, which takes place as a result of an error in the electron transport chain. Normally, in the electron transport chain,...

• Word Count: 2319
• Approx Pages: 9
• Has Bibliography
• Grade Level: Undergraduate

... brain injury is valid in the absence of hard neurological data, as in the case of minimal brain dysfunction (MBD)" (Sindelar, Rosenberg, Wilson, 1997). There is a belief that body chemistry is linked to behaviour. Although it is hard to determine this when it isn't proven which specific process, when disrupted can cause behaviour disorders. From our body ... 's chemistry neurotransmitters and diet are the two main causes of behaviour disorders. For example an overproduction of neurotransmitters can cause aggressive behaviour and too much sugar in a child's diet can ... over aggressive im...

• Word Count: 1277
• Approx Pages: 5
• Grade Level: Undergraduate

... , it became clear to Campbell and Roberts the blueprint for success: to modify and build upon Zaprinast's ring structure, allowing tight binding to PDE's active site without excess, potency-hindering mechanisms. This was no easy feat since progress in pharmaceutical drugs at the time is achieved mostly through vigorous stages of trial and error. The team spent four arduous years exploring ... that is diehard as well! The original synthesis route of sildenafil was extensive and produced small yield. There are a total of six steps and four intermediates. The process begins by reaction of d...

• Word Count: 1604
• Approx Pages: 6
• Has Bibliography
• Grade Level: Undergraduate