... accelerant or explosive used. Forensic Toxicology is an interdisciplinary science dealing with and interpretation of drugs and chemical samples for medical-legal purposes The hybrid and analytical chemistry, pharmacy toxicology. The Forensic Science Foundation said,"Forensic toxicology is the study and understanding of the harmful effects of external substances introduced into the living systems within ... published the first reliable procedures for the microscopic detection of sperm. He also note ud the different microscopic characteristics of various different substrate fabrics. 1851 J...

• Word Count: 4661
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• Grade Level: Undergraduate

... properties, and reactions of matter (especially of atomic and molecular systems). For years chemistry has been divided into four "classical" areas: analytical, inorganic, organic, and physical. Chemistry has played a major role in pharmaceutical advances, forensic science, and modern agriculture. Organic chemistry is essential in biological and medical fields. All living organisms are composed of abundances ... of the analytical chemical information play important roles in selecting the appropriate chemical analysis technique. These techniques are used in the significant field of forensi...

• Word Count: 469
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• Grade Level: Undergraduate

... project scientist at NASA's Goddard Space Flight Center. "They cook the original elements like hydrogen and helium and they make them into all the stuff that we learned about in chemistry class - carbon, nitrogen, iron, etc." "We astronomers are fond of saying that every atom we exist of once-upon-a-time lived in the center of a star that exploded like this ... basic building blocks of life were formed, and through the advancement of technology we are now able to more fully understand where the elements of our existence come from.. Cosmic Chemistry A brief overview of the cosmic origins...

• Word Count: 976
• Approx Pages: 4
• Grade Level: Undergraduate

Chemistry in society focuses on the problems that humans perform against the ecosystem. This essay will discuss direct problems with the environment and ways in which I personally can help solve these ... effective and there are ways around them by simply not driving; 2) stop breathing which is definitely out of the question because I need to breath to be able to stay alive. Chemistry in society focuses on the problems that humans perform against the ecosystem. This essay discussed the direct problems with the environment and ways in which I personally can help solve these ... ...

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• Grade Level: Undergraduate

... configuration of neon. Another periodic property of elements is the electronegativity. The electronegativity is the tendency of an element to acquire one electron. For the reasons discussed above, the electronegativity of elements increasing from left to right along the periodic table, while, in a ... is called the atomic number. It represents the number of protons in that given element which, by definition, is equal to the number of electron of the same element. There cannot be two elements in the periodic table characterized by the same atomic number. The bottom-left number is ... a...

• Word Count: 1447
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• Grade Level: Undergraduate

... bond that involves sharing a pair of electrons between atoms in a molecule. The two atoms have positive nuclei. They are both attracted to the same electron. In this way the two nuclei are held close to each other. Each atom will follow the octet rule – A full outer shell ( ... by a line drawn between the atoms. Hence a hydrogen molecule can be represented as H–H. Another example is when two chlorine atoms, with electron configurations of 2, 8, 7, combine to form a chlorine molecule, the chlorine atoms share a pair of electrons. In this way, each chlorine atom obtains a share in ... w...

• Word Count: 3267
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• Grade Level: Undergraduate

... on the flow of electrons through a single type of semiconductor material. This is why the FET is sometimes called a unipolar transistor. Unlike bipolar semiconductors that can be arranged in many configurations to provide diodes, transistors, photoelectric devices, temperature sensitive devices and so on, the field effect is usually only used to make transistors, although FETs are also available as special-purpose ... therein. Even within a given polytype, some important electrical properties are non-isotropic, in that they are strong functions of crystallographic direction of current f...

• Word Count: 1606
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• Grade Level: Undergraduate

... both include change of vitality from one structure into another, there are different contrasts and in addition likenesses between the two procedures. A few likenesses incorporate the utilization of an electron transport chain, and both of these procedures occur in a layer bound organelle, for example, chloroplast in photosynthesis and mitochondria in cell breath. The key connection in the ... five carbon sugar ribulose bisphosphate which is catalyzed by ribulose bisphosphate carboxylase 4. The primary stage produces two atoms of phosphoglyceric corrosive that use the NADPH and ATP from ...

• Word Count: 1510
• Approx Pages: 6
• Grade Level: Undergraduate

... these experiments. These new mechanics and its Copenhagen interpretations achieved by the end of 1927 were combined with other innovations such as the electron spin and the exclusion principle. These new innovations opened up the realm of the atom and enabled entirely new and profound advances in ... of the atom. They modeled this research off of the Balmer formula for the case of the outer helium electron and treated the excited helium electron the same as a hydrogen electron. After a very successful three years of study at the University of Munich, Heisenberg prepared for his oral exam...

• Word Count: 4391
• Approx Pages: 18
• Grade Level: Undergraduate

... these experiments. These new mechanics and its Copenhagen interpretations achieved by the end of 1927 were combined with other innovations such as the electron spin and the exclusion principle. These new innovations opened up the realm of the atom and enabled entirely new and profound advances in ... of the atom. They modeled this research off of the Balmer formula for the case of the outer helium electron and treated the excited helium electron the same as a hydrogen electron. After a very successful three years of study at the University of Munich, Heisenberg prepared for his oral exam...

• Word Count: 4427
• Approx Pages: 18
• Grade Level: Undergraduate

... between a number of political actors within a particular system of international relations, either global or regional can be seen in terms of geometric patterns of strategic configurations. It can be a case of simple geometry, in which A interacts with B: but in a more complex system such as that of Asia, with ... an analytic tool. If we view the international relations of Asia, more and the interactions of the main actors in terms of strategic configurations and geometric patterns of alignments and oppositions, then we can assess changes in the political system over time by way of the ...

• Word Count: 4761
• Approx Pages: 19
• Grade Level: Undergraduate

... SQL server database with a custom web client front end. The Microsoft Access database is fairly simple. We use this data base to keep track of the computer hardware and software configurations that are used when doing quality assurance testing and problem replication and troubleshooting of the software product. For any one product we can have up to twenty or thirty different ... configurations. Initially keeping track of the configurations along with the machine name and IP address was done on paper with a grid like matrix. After a short period of time, this became extremely time consum...

• Word Count: 786
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• Grade Level: Undergraduate

... pulled down the chain thanks to oxygen that is very electronegative and thus it demands more electrons then the other acceptors, making oxygen the final electron acceptor. Oxygen's high electronegativity allows it to be an acceptor. The Electron Transport Chain doesn't make ATP directly, its main function is to ease electrons from food to oxygen, breaking a large free energy drop into smaller ... given off. There are two parts in the light reaction, cyclic photophosphorylation and non-cyclic photophosphorylation. Oxygen is created in the second process, where water is oxidized to give a...

• Word Count: 656
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• Grade Level: Undergraduate

... that produces ATP by phosphorylating molecule of ADP. Moreover, Chemiosmosis uses coenzymes, which, through a series of redox reactions, transfer energy along an electron transport chain. Furthermore, as electrons travel in a step-like manner down an electron transport chain, energy is released from one coenzyme carrier to one another. Additionally, released energy pumps protons from the matrix of a mitochondrion into ... the space between inner and outer membranes. As well, Ion sulfur and Q molecules transfer electrons down the electron transport chain. To continue, the end of the elec...

• Word Count: 386
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• Grade Level: Undergraduate

... measuring hardware, analog-to-digital converter and software to display measured voltage into digital information. The analog oscilloscope uses a CRT monitor that is basically an electron "canon", in a vacuum glass tube, that accelerates electrons and projects them into a point at the end of the tube, through an ... electric field. The end of the tube has a phosphorous coating that glows when is hit by the electron beam. Each of electrons would experience a force induced by the electric field and, as a result the stream is deflected by an amount directly ... proportional with the stren...

• Word Count: 993
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• Grade Level: Undergraduate

... they included Alan Fowler who pursued investigations that led to the founding of a new branch in Physics, the "Two Dimensional Gas" theories, describing phenomena related to the behavior of electron in solid interfaces separating different materials, such as those existing in semiconductor devices. And there was John Cocke, a resident genius who tackled any conceivable problem related to computing, invented ... forward looking nature of our research activities at the time. A great deal of attention was paid to the physics of semiconductors and associated technologies and processes. For e...

• Word Count: 2883
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• Grade Level: Undergraduate

... theory, helped the 3 researchers receive a Nobel Prize for its development. The BCS theory states that as electrons flow through the superconductor, they join up in pairs (called Cooper Pairs). These electron pairs are put together by phonons, which create a kind of glue-like substance. As a pair flows through the lattice structure of the superconductor, it leaves a wake behind it. The wake ... temperature of the superconducting material rises, the atomic vibrations within the material increase to the point where the lattice structure begins to vibrate too much. The increased vibration ...

• Word Count: 2790
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• Grade Level: Undergraduate

... intermolecular forces : - Van Der Waals' Forces : a temporary dipole that occurs in a molecule, attracting another molecule of the same compound to itself, due to one of the molecules having an electron repel the electron in the other molecule, creating a positive-negative pole and attraction. These forces are the weakest of the three. - Permanent Dipole Forces : polar molecules causing induced attraction due to the ... atoms have a free pair of electrons. Ten times stronger than Van der Waals' forces, they occur when the electron density changes around the atoms : the electronegative a...

• Word Count: 879
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• Grade Level: Undergraduate

... investigation of nuclear forces. He theorized that if the interactions cannot be explained by forces that come from the jumping of electron-neutrino pairs then there must be some other particle that does the jumping (Waller 1). This hypothetical particle was known as a Yukon, a Japanese ... electron, a heavy electron, a mesotron, and finally, as it is known today, a meson (Waller 1). A meson is a strongly interacting particle that is made up ... Gamow 152). Mesons are particles that are heavier than electrons, but lighter than protons (Waller 1). Their actual mass is about 200 times that...

• Word Count: 456
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• Grade Level: Undergraduate

... exist an antiparticle." The first antiparticle was discovered by a physicist named Carl Anderson four years after this theory was proposed. Anderson discovered the anti-electron. He called the anti-electrons "positrons" because the electron he discovered had a positive charge. After the discovery of the first antiparticle, scientists have detected that for every type of particle, there always exists its ... exist an antiparticle." The first antiparticle was discovered by a physicist named Carl Anderson four years after this theory was proposed. Anderson discovered the anti-electron. He ...

• Word Count: 702
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• Grade Level: Undergraduate

... charge. By measuring the effect of an electric field on single drops of evaporating oil, Robert Millikan ingeniously was able to measure the charge of a single electron and then to determine it's mass. By the beginning of the twentieth century, relatively very little was known for certain about the structure of an atom. ... . This changed in 1897, when the British physicist J.J. Thomson was able to determine the ratio of electrical charge to mass for an electron using a cathode-ray tube. This ratio of 1.76*10^8 coulombs per gram, was what enabled Millikan to calculate the mass of a singl...

• Word Count: 600
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• Grade Level: Undergraduate

... been some chemical reactions taking place on Europa, which Kevin Hand and Max Bernstein believe is the simultaneous production of electron donors and electron acceptors. All humans and animals on Earth combine our electron donor, which is reduced carbon, with oxygen, which is our electron acceptor. Kevin has been working on finding ways that these reactions could be produced on Europa with the limited ... ...

• Word Count: 508
• Approx Pages: 2
• Grade Level: Undergraduate

... charge. By measuring the effect of an electric field on single drops of evaporating oil, Robert Millikan ingeniously was able to measure the charge of a single electron and then to determine it's mass. By the beginning of the twentieth century, relatively very little was known for certain about the structure of an atom. ... . This changed in 1897, when the British physicist J.J. Thomson was able to determine the ratio of electrical charge to mass for an electron using a cathode-ray tube. This ratio of 1.76*10^8 coulombs per gram, was what enabled Millikan to calculate the mass of a singl...

• Word Count: 579
• Approx Pages: 2
• Grade Level: Undergraduate

... than germanium. When Silicon, a group 4 element, is doped with a group 5 element it will form an n-type semiconductor. Silicon has a tetrahedral structure, when silicon atoms are covalently bonded they share one electron with another silicon atom. If one silicon atom is replaced with a group 5 elements such as nitrogen then the nitrogen atom will chare four of its electrons with 4 other silicon atoms ... in a covalent bond and there will be one free electron to move around. This free electron becomes the majority charge carried in the doped semiconductor, but charge will still be carrie...

• Word Count: 1202
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... particular science, but none made a greater impact than Antoine Laurent Lavoisier, the most resplendent scientist throughout the whole world. He is still known to be the father of modern chemistry, because he has made the greatest impacts in the world of science; to understand these impacts one should acquire knowledge of his private and public life. Lavoisier was born on ... 334), he is also responsible for making contributions in many aspects of science such as minerals and water, Phlogisten, a theory made by Phlogiston that says fire releases a substance called Phlogiston (Chemistry ...

• Word Count: 835
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• Grade Level: Undergraduate