BATTERIES |
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In science and technology, a battery is a device that stores chemical energy and makes it available in an electrical form. Batteries consist of electrochemical devices such as one or more galvanic cells, fuel cells or flow cells. The earliest known artifacts that may have been batteries are the Baghdad Batteries, from some time between 250 BCE and 640 CE. The modern development of batteries started with the Voltaic pile developed by the Italian physicist Alessandro Volta in 1800. The worldwide battery industry generates 48 billion dollars in sales annually (2005 estimate).
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BIOMEDICAL ENGINEERING |
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Biomedical engineers use their expertise in biology, medicine, physics, mathematics, engineering science and communication to make the world a healthier place. The biomedical engineer is ideally trained to work at the intersection of science, medicine and mathematics to solve biological and medical problems.
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ELECTROPHYSIOLOGY |
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Electrophysiology is the study of the electrical properties of biological cells and tissues. It involves measurements of voltage differences across cell membrane, and studies of how the flow of electrical current across membranes is regulated. In neuroscience, it includes measurements of the electrical activity of neurons, and particularly action potential activity.
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LAPAROSCOPY |
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Laparoscopic surgery, also called keyhole surgery (when natural body openings are not used), bandaid surgery, or minimally invasive surgery (MIS), is a surgical technique. Medically, laparoscopic surgery refers only to operations within the abdomen or pelvic cavity. Laparoscopic surgery belongs to the field of endoscopy.
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LEAD |
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Lead is a chemical element in the periodic table that has the symbol Pb (L. plumbum) and atomic number 82. A soft, heavy, toxic and malleable poor metal, lead is bluish white when freshly cut but tarnishes to dull gray when exposed to air. Lead is used in building construction, lead-acid batteries, bullets and shot, and is part of solder, pewter, and fusible alloys. Lead has the highest atomic number of all stable elements. (But see the article on Bismuth, which has a half life so long it can be considered stable.)
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