PAPER Topics

... of livestock with genes that produce “super” livestock traits; however, this technique is not efficient because only five percent of the offspring express these “super” traits that would guarntee a more productive industry. Scientists can easily genetically alter adult cells; therefore, cloning from an adult cell would make it easier to alter the genetic material. The goal of transgenic livestock1 is to produce livestock with ideal characteristics for the agricultural industry and to be able to manufacture biological products such as proteins for humans. Farmers are attempting to produce transgenic livestock already, but not efficiently, due to the minimal ability to alter embryos g ...

... be much simpler and faster to perform and could be available to all pregnant women who wish to take advantage of the technology. Current prenatal testing involves growing fetal cells in vitro and examining them, over one or two months, to see if there are two copies of a particular chromosome, which is normal, or one or three, which is abnormal. A test using Willard's probes would require only a few cells and a few days to detect abnormalities. "I don't think it's beyond the realm of possibility that these kinds of tests could eventually be done by an obstetrician in the office during the early stages of pregnancy," he adds. The determination of gender is another possible use for the ...

... amounts is vital to all plant and animal life. The properties that make copper extremely useful include - Conductivity - Silver is the only better conductor, but is too expensive for common use. Copper also conducts both electricity and heat extremely well, which makes it extremely useful for cooking utensils, radiators, and refrigerators. Malleability - Copper is highly malleable. It does not crack when hammered, stamped, or forged, and can be worked when it is both hot and cold. It can be rolled into sheets less than 0.05mm thick. Cold rolling changes the physical properties of copper, and increases its strength. Ductility - Copper has the ability to be drawn into thin wires w ...

... was in the selection of the sex of an unborn child. In Vitro Fertilization(IVF - A procedure in which a woman’s eggs are removed from her body, fertilized outside using sperm from her husband or another donor, and then transferred back to her body.) was originally limited to couples that were infertile. Even the use of IVF for the infertile was unheard of at one point. “But growing demand makes it socially acceptable, and now anybody who’s infertile demands IVF,” says Lee Silver, a Princeton University biologist. Several years ago, fertility clinics announced the new possibility of sex selection. It was obviously an exciting breakthrough, but when ...

... could probably notice from it's name, storage dams are created to collect or hold water for periods of time when there is a surplus supply. The water is then used when there is a lack of supply. For example many small dams impound water in the spring, for use in the summer dry months. Storage dams also supply a water supply, or an improved habitat for fish and wildlife; they may store water for hydroelectricity as well. A diversion dam is a generation of a commonly constructed dam which is built to provide sufficient water pressure for pushing water into ditches, canals or other systems. These dams, which are normally shorter than storage dams are used for irrigation developments and ...

... pressure on the upper and lower surfaces of the wing. Movement of air about the airplane, particularly the wing, is necessary before the aerodynamic force of lift becomes effective. During flight, however, pressures on the upper and lower surfaces of the wing are not the same. Although several factors contribute to this difference, the shape of the wing is the principal one. The wing is designed to divide the airflow into areas of high pressure below the wing and areas of comparatively lower pressure above the wing. This pressure differential, which is created by movement of air about the wing, is the primary source of lift. The weight of the airplane is not a constant. It varies with t ...

... Chinese Art of Tea, writes that ¡§it can be confidently stated that tea was known in the three kingdoms epoch (AD 222-277).¡¨ More importantly, however, ¡§tea [was] originally drunk for its medicinal properties.¡¨ (Blofeld 4) Evans links the early popularity of tea to Taoist religious practices during the Qin Dynasty (201 ¡V 207 B.C.). ¡§Taoists in particular became obsessed by long life and an Elixir of Life became a Taoist ideal. For Taoists the Elixir of Life was believed to be tea.¡¨ (Evans 20) Almost every writer who records the history of tea notes that it was originally consumed for its therapeutic effects. Zhang Binglun says that ¡§much was written in ancient Chinese books¡¨ about t ...

... safety fuses, igniters, igniter cord, fuse lighters, Class B special fireworks, and Class B composite solids propellants. Class C explosives are common fireworks. Note that short lengths of Primacord may be classified as Class C under certain conditions. Both Class B and C explosives are also called low explosives. All pyrotechnic materials and other explosives consist of an oxidizer (source of oxygen) and a reducer (fuel). Examples of oxidizers include potassium nitrate, strontium nitrate, potassium perchlorate and potassium chlorate. Examples of fuels include metals like magnesium and aluminum, sulfur, silicon dioxide, and organic fuels like charcoal, starch, resins, and chlorinat ...

... feverish and anemic, lost their appetites, and had hemorrhages. The experimenters compared their results to those experiments conducted at the University of Utah and the Argonne National Laboratory in which beagles were injected with Strontium 90. They concluded that the dose needed to produce “early death” in fifty percent of the sample group differed from test to test because the dogs injected with Strontium 90 retain more of the radioactive substance than dogs forced to inhale it. Also, at the University of Rochester School of Medicine a group of experimenters put fifty beagles in wooden boxes and tested them with different levels of radiation by x-rays. Twenty-one of the dogs died with ...

... or motion. This means the rocket balloon won't start until you let go of the closing (hole). It wont stop until it runs out of air or something is in the way of its' path. The second law of motion is: The acceleration of an object increases as the amount of force causing the acceleration increases. This means the more air in the balloon the farther and faster it goes. The third law of motion is: For every action force there is an equal and opposite reaction force. This means, if you let go of the balloon, something would slow or stop it eventually. The balloon slows down when it starts running out of air. It begins quickly. The more air in the balloon the farther it travels. Inert ...