... , and measuring molecular ions according to their mass-to-charge ratio. The ions are generated in the ionization source by inducing either the loss or the gain of a charge (e.g. electron ejection, protonation, or deprotonation). Once the ions are formed in the gas phase they can be electrostatically directed into a mass analyzer, separated according to mass and finally detected. The ... sequencing of peptides and proteins, studies of non-covalent complexes and immunological molecules, DNA sequencing, and the analysis of intact viruses. In the 1990's, mass spectrometry hit the mainstream c...

• Word Count: 2140
• Approx Pages: 9
• Has Bibliography
• Grade Level: Undergraduate

... which was damaged 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, an electron is passed from transfer protein to transfer protein until it reaches the end, where it ... reacts with Oxygen, and protons to form water, as illustrated in reaction 1. However, approximately one to three percent of electron transfer in the electron transport ... discovered that pat...

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

... fact as to why crime causation has risen. The psychobiology of crime highlights the role of human DNA, environmental contaminants, nutrition, hormones, physical trauma (especially to the brain), and body chemistry in human cognition feeling and behavior. Chromosome theory has also been an explanation for criminal behavior that has had taken place in the 1960's. Females have an XX chromosome because ... this is how it looks under an electron microscope. A male has a Y chromosome that is in place of the second, for a male pattern of XY. In 1965, there was an English Journal named Nature t...

• Word Count: 1490
• Approx Pages: 6
• Has Bibliography
• Grade Level: High School

... in the same pattern. Any system of identification and classification relies on being able to observe variations on a series of known features. In fingerprinting these "features" are the shapes and configurations of the ridges found on the fingertip. Along the ridges is where tiny sweat pores are found; they are responsible for carrying body oils. Therefore whenever the hand touches something ... ...

• Word Count: 1733
• Approx Pages: 7
• Has Bibliography
• Grade Level: High School

... one common theme, that is that they are all made up of cells. The structure of a cell and the different components within a cell will be discussed as seen under an electron microscope which is able to magnify the cell much more than a simple light microscope. Animal cells are known as being Eukaryotic, literally translated as "good nucleus" indicating that the cell ... ...

• Word Count: 1603
• Approx Pages: 6
• Has Bibliography
• Grade Level: Undergraduate

... that the puparial skin is the same as old maggot skin because it retains the outlines of the spiracles and other sclerotized parts of that stage. For example, the scanning electron micrograph above is an end-on view of the posterior of a blow fly puparium. The three slits on each side are the "mummified" traces of the three slits visible in ... ...

• Word Count: 2073
• Approx Pages: 8
• Grade Level: High School

... that the puparial skin is the same as old maggot skin because it retains the outlines of the spiracles and other sclerotized parts of that stage. For example, the scanning electron micrograph above is an end-on view of the posterior of a blow fly puparium. The three slits on each side are the "mummified" traces of the three slits visible in ... ...

• Word Count: 2083
• Approx Pages: 8
• Grade Level: High School

... provides this loss of diversity could create a situation where no one possesses genetic resistance to certain disease, leaving all of humanity vulnerable to extermination by an epidemic,"" says Michael Mautner, a chemistry professor at the University of Canterbury. "In sexual reproduction, some of the genetic material from each parent undergoes mutations that can lead to entirely new biological properties. Vast numbers of ... ...

• Word Count: 2464
• Approx Pages: 10
• Has Bibliography
• Grade Level: Undergraduate

... be separated through the application of an electric current. Electrophoresis was developed by Arne Tiselius. The process is used in medicine and biochemistry (science concerned with the organic and physical chemistry) to separate, identify, and measure the amount of various proteins. Electrophoresis is an analytical method frequently used in molecular biology (study of life processes) and medicine. It is applied for ... ...

• Word Count: 1589
• Approx Pages: 6
• Grade Level: Undergraduate

... be separated through the application of an electric current. Electrophoresis was developed by Arne Tiselius. The process is used in medicine and biochemistry (science concerned with the organic and physical chemistry) to separate, identify, and measure the amount of various proteins. Electrophoresis is an analytical method frequently used in molecular biology (study of life processes) and medicine. It is applied for ... ...

• Word Count: 1595
• Approx Pages: 6
• Grade Level: Undergraduate

... her out quickly and Maurice did not have good enough reason to fire her. Personally what I see is that Watson is jealous of Franklin, because she possesses knowledge of physical chemistry and or x-ray which was uncommon. Watson could have started to resent Rosalind when she insulted Watson and Cricks model claiming that it was not right. She referred to the ... ...

• Word Count: 2348
• Approx Pages: 9
• Has Bibliography
• Grade Level: High School

... reactions. Lyons says it well in his article stating that: "As for creating life artificially, there is something special about humans being created out of an act of love, not chemistry" (496). Wachbroit concludes this emotion by quoting theologian Gilbert Meilaender, Jr on the unnatural birth of a clone. Meilaender states a cloned child would be "designed as a product" rather that "welcomed as ... ...

• Word Count: 1878
• Approx Pages: 8
• Has Bibliography
• Grade Level: High School

... organisms have been evolving to escape our controls. Moreover, scientists can perform experiments to study evolution in real time, just as experiments are used to observe dynamic processes in physics, chemistry, and other branches of biology. To study evolution in action, scientists use organisms like bacteria and fruit flies that reproduce quickly, so they can see changes that require many generations ... ...

• Word Count: 1289
• Approx Pages: 5
• Grade Level: Undergraduate