... the time. In most cases it works very well, but sometimes different methods are needed. Forensic scientists can now use a small portable laser to look for fingerprints. The scientists "paints" the scene of crimes with the laser beam. As the laser beam sweeps across doors, walls and furniture, any fingerprints on them g ulow because they are fluorescent. Some atoms in the print absorb ... , and then release it again in a for of a burst of light. All of these tiny flashes combine to make the whole print glow when the laser beam hits it. The technique of laser-sweeping enables large areas t...

• Word Count: 4661
• Approx Pages: 19
• Grade Level: Undergraduate

... the time. In most cases it works very well, but sometimes different methods are needed. Forensic scientists can now use a small portable laser to look for fingerprints. The scientists paint the scene of crimes with the laser beam. As the laser beam sweeps across doors, walls and furniture, any fingerprints on them glow because they are fluorescent. Some atoms in the print absorb ... , and then release it again in a burst of light. All of these tiny flashes combine to make the whole print glow when the laser beam hits it. The technique of laser-sweeping enables large areas to be searched ...

• Word Count: 4359
• Approx Pages: 17
• Grade Level: Undergraduate

... broadband systems that we know are referred to as " the dirt road" (pg 53). The "paved highway" that scientist are trying to reach will most likely be made up of laser fiber optics (pg 53). The laser is expected to carry information 10 to 100 times faster than our current connections. By mixing common-sense programs and ... laser fiber optics could truly turn the Internet into a "Magic Mirror" (pg 44). If we are to ever have a true Magic Mirror then we must first invent a machine that is able ... ...

• Word Count: 2066
• Approx Pages: 8
• Has Bibliography
• Grade Level: High School

... fall, within a few years its possible to plummet to one hundredth of current prices. DNA printers will eventually become inexpensive, similarly to what happened to the cost of laser printers –the first laser printer, the Xerox Star 8010 costed $17,000. As scientists continue to learn more about DNA, their studies will not be limited to human DNA. As we progress ... ...

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

... of rapid development fueled the enthusiasm that ushered in even greater discoveries during the 1980s and 1990s. Two techniques developed in the mid 1980's, electrospray ionization (ESI) and matrix assisted laser desorption/ionization (MALDI), have had a significant impact on the capabilities of mass spectrometry. ESI is the production of highly charged droplets that are treated with dry gas or heat to ... into use for biomolecule analysis in the 1980's. MALDI was developed by Tanaka et al. (Japan) as well as by Franz Hillenkamp and Michael Karas, both of Germany. MALDI uses a laser to d...

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

... ends of the fingers. By defining the hand span to be measured, discrepancies between measurements should have been reduced giving rise to more accurate and reliable results. Foot length: The foot length was measured from the back of the heel to the end of the big toe when placed on a flat surface. This measurement excluded any nail extending over the ... determine its strength, characteristic (i.e. positive or negative) and significance. 1 - 6 x Åd2 n(n2-1) = 1- 6 x 19711 100(1002-1) = 1- 118266 999900 = 0.882 (3sf) The value for the correlation between hand span and foot length is 0....

• Word Count: 3540
• Approx Pages: 14
• Grade Level: High School

... face of his famous painting, the Mona Lisa, around golden rectangles. Furthermore, some of Mozart's most famous sonatas are divided into two parts, whose length is the golden ratio. In fact, this number is so powerfull that the ancient Greek mathematicians and Pythagoras considered the number Phi to be godly. Today ... made use of the golden ratio and incorporated it in their work. Another example would be the Christian cross; the ratio of the vertical length to the horizontal length is the golden ratio. Furthermore, many of us use golden rectangles at least once a day, when we use a cre...

• Word Count: 938
• Approx Pages: 4
• Grade Level: High School

... . The envelope glycoproteins are thought to be the major elements involved in induction of immunity to hantaviruses. Genomic RNA of hantavirus shows relatively few differences in length between the L and M segments. However, the S segment varies in length mainly in its 3' noncoding region. The noncoding region specific to the S segment is made up of numerous imprecise repeats. Both the 3' and 5' ends ... prime-and-realign mechanism of replication resulting in 5' ends containing only monophosphate. The S segment 3' NCR represents the most puzzling aspect of the hantavirus genome. Within a ...

• Word Count: 3218
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• Has Bibliography
• Grade Level: High School

... are used in the detection of DNA in many aspects of the project; a very important use is in sorting chromosomes by flow cytometry. Lasers are also used in confocal fluorescence laser microscopy to excite fluorescently tagged molecules in genome mapping, in addition to other mapping uses. In diagnostic applications, lasers are used with fluorescent probes attached to DNA to light up ... ...

• Word Count: 961
• Approx Pages: 4
• Has Bibliography
• Grade Level: Undergraduate

... are used in the detection of DNA in many aspects of the project; a very important use is in sorting chromosomes by flow cytometry. Lasers are also used in confocal fluorescence laser microscopy to excite fluorescently tagged molecules in genome mapping, in addition to other mapping uses. In diagnostic applications, lasers are used with fluorescent probes attached to DNA to light up ... ...

• Word Count: 832
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• Has Bibliography
• Grade Level: Undergraduate

... (FACS) and the percentage of cells expressing GFP varied form 4.9-20.4%. Flourescently labeled samples were examined with a Leica confocal microscope attached to a Leitz dioplan microscope equipped with a double argon-krypton laser....

• Word Count: 426
• Approx Pages: 2
• Grade Level: Undergraduate

... term. Scientific discovery is often implemented before society understands the results of the new idea. Science advances at a rate faster than the understanding of the total consequences of a discovery. Asbestos, laser eye surgery, and now human cloning have demonstrated how discovery can lead to unanticipated results. The scientific breakthrough of giving birth to a human clone caught the world off guard. The ... ...

• Word Count: 607
• Approx Pages: 2
• Has Bibliography
• Grade Level: High School

... are used in the detection of DNA in many aspects of the project; a very important use is in sorting chromosomes by flow cytometry. Lasers are also used in confocal fluorescence laser microscopy to excite fluorescently tagged molecules in genome mapping, in addition to other mapping uses. In diagnostic applications, lasers are used with fluorescent probes attached to DNA to light up ... ...

• Word Count: 948
• Approx Pages: 4
• Grade Level: Undergraduate

... instantly if ATP and Ca 2+ is added to them. "The central and structural and functional unit of a muscle cell is the sarcomere, a cylinder of 1.5 micrometers in diameter and 2 micrometers in length which contains about 2 * 2000 thin protein filaments and 1000 thick protein filaments- (2). Each sarcomere is separated by Z-discs. Two Z-discs bound a sarcomere in the direction of stretching. Thin filaments made ... other. Each saromere unit of the myofibrils shortens proportionally to the muscle contraction. Upon contraction, it is the light bands, which shorten whereas the dark bands do n...

• Word Count: 1417
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... show that RNA can act as an enzyme. 1983: Kary Mullis devises polymerase chain reaction (PCR) which allows rapid multiplication of DNA snippets. Alec Jeffreys develops RFLP- restriction fragment length polymorphisms, also known as genetic fingerprinting. Blackburn and Greider discover telomerase, a life-extending enzyme for cells 1985: Gallo and Montagnier publish genetic sequence of HIV. 1986: Leroy Hood ... advent of the FBI's new Combined DNA Index System, or CODIS, for short (DNA Detectives). So what exactly is CODIS? Building on Alec Jeffreys" discovery of restriction fragment lengt...

• Word Count: 2807
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... equivalent of a computer programming loop" and copies itself repeatedly. This takes place at the end of each chromosome and/or in tons of other identifiable locations along "DNA's six-foot length" (Schefter 2-3). This process results in a genetic fingerprint. A fingerprint comes from a purified DNA sample which has been made into billions of copies and identified by types found in that sample (Cheney ... 3). Genetic fingerprinting uses the complex technology of an electrical field to separate DNA pieces by length and radioactive material to create a mark on an X-ray film of and individu...

• Word Count: 1919
• Approx Pages: 8
• Has Bibliography
• Grade Level: High School

... away on the graph when plotted. Based on my results, as the concentration of ATP increases, so does the contraction increases as well. There were also noticeable changes in the length of muscle when ADP was added. The same result was observed as with ATP; as the concentration of ADP increases so does the contraction. Muscle cells have enzyme which not ... Z-lines/disk move closer together. During contraction the think and thin filaments remain constant, but the sarcomere is shorter in length. For a relaxed muscle, the opposite occurs, there is a little over with the thick and thin filam...

• Word Count: 1043
• Approx Pages: 4
• Grade Level: Undergraduate

... away on the graph when plotted. Based on my results, as the concentration of ATP increases, so does the contraction increases as well. There were also noticeable changes in the length of muscle when ADP was added. The same result was observed as with ATP; as the concentration of ADP increases so does the contraction. Muscle cells have enzyme which not ... Z-lines/disk move closer together. During contraction the think and thin filaments remain constant, but the sarcomere is shorter in length. For a relaxed muscle, the opposite occurs, there is a little over with the thick and thin filam...

• Word Count: 1260
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... fact that Lamarck believes Giraffes have long necks because their ancestors stretched their necks because their ancestors stretched their necks to browse on the leaves; and that this increase in length was passed on to succeeding generations. This seemed unreasonable because people had been cutting off tails of many dogs but they never resulted in an offspring born without a tail for ... correct. Darwin observed that wild animals and plants showed variations just as domesticated animals and plants did. He filled his notebooks with records of height, weight, color, claw size, tail length...

• Word Count: 2685
• Approx Pages: 11
• Has Bibliography
• Grade Level: High School

... away on the graph when plotted. Based on my results, as the concentration of ATP increases, so does the contraction increases as well. There were also noticeable changes in the length of muscle when ADP was added. The same result was observed as with ATP; as the concentration of ADP increases so does the contraction. Muscle cells have enzyme which not ... Z-lines/disk move closer together. During contraction the think and thin filaments remain constant, but the sarcomere is shorter in length. For a relaxed muscle, the opposite occurs, there is a little over with the thick and thin filam...

• Word Count: 1138
• Approx Pages: 5

... knows how long after death the eggs are laid, and how fast the larvae grow, he then has the lenth of time the corpse have been exposed to insects. This length of time is the minimum PMI. So, if all the information exists the entomologists can put it together to obtain a fairly precise estimate of the minimum time the body must ... of time and recovery of the victims blood can also create a link between perpetrator and suspect. When estimating the PMI, climatological data about the crime scene is absolutely critical. The length of the insect life cycle is determined mostly by temperature...

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

... the nucleus. However, not much attention has been paid to a section of the genome found in the mitochondrion: mitochondrial DNA, (or mtDNA). MtDNA is only 16,569 base pairs in length, less than 1/300,000th of the entire human genome (Miller), yet mtDNA it has some properties that carry important implications. In this essay, I would like to discuss some important properties ... DNA, and the implications of these properties on forensic DNA testing, on eukaryotic evolutionary history, and on human aging and disease. Properties of Mitochonria Although mtDNA is very short in length, it is ve...

• Word Count: 2319
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• Has Bibliography
• Grade Level: Undergraduate

... on HGP but with NIH played the main role. The work of U.S. HGP could be divided into two parts: finish genetic map, i.e. the distance between 2-5 centimorgans (1 centimorgan equal to the length of 1 million bases) to distinguish the genes' location; and finish physical map, i.e. figure out all the genes sequence in chromosomes. After the establishment of U.S. HGP, the other countries followed and ... up gene database. Originally the scientists use E.Coli plasmid which can only carry short fragments, but now they changed to use Yeast Artificial Chromosomes (YAC) to carry fragments and th...

• Word Count: 2280
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• Has Bibliography
• Grade Level: High School

... knows how long after death the eggs are laid, and how fast the larvae grow, he then has the lenth of time the corpse have been exposed to insects. This length of time is the minimum PMI. So, if all the information exists the entomologists can put it together to obtain a fairly precise estimate of the minimum time the body must ... of time and recovery of the victims blood can also create a link between perpetrator and suspect. When estimating the PMI, climatological data about the crime scene is absolutely critical. The length of the insect life cycle is determined mostly by temperature...

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

... of three different phylogenies and one final data alignment of both COX1 gene and 16s. The evolutionary history was inferred using the Maximum Parsimony method. The most parsimonious tree with length = 7303 is shown. The consistency index is 0.465425 (0.462333), the retention index is 0.459878 (0.459878), and the composite index is 0.214039 (0.212617) for all sites and parsimony-informative sites (in ... ...

• Word Count: 2043
• Approx Pages: 8
• Has Bibliography
• Grade Level: High School