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    POLYPROPYLENE
    November 12, 1999 - Bartlesville, Oklahoma, U.S.A.

    In Bartlesville, Oklahoma, a plaque was placed on the site of the laboratory where the polymer polypropylene was invented, designating it a National Historic Chemical Landmark by the American Chemical Society. The first commercially successful use of the new material was in the Hula Hoop®. In 1951, J. Paul Hogan and Robert L. Banks, research chemists working for Phillips Petroleum Company, discovered the polymer unexpectedly during experiments with catalysts while trying to convert the natural gas components ethylene and propylene into compounds useful for gasoline. Later, they also developed a new catalytic process for making high-density polyethylene. Phillips soon invested in new plastic manufacturing plants.

    PITOT TUBE
    November 12, 1732 - Academy of Sciences, Paris

    Henri Pitot read a paper to the Royal Academy of Sciences in Paris about an instrument he had invented to measure the flow velocity at different depths of water in the River Seine. It had a scale and two open vertical glass tubes on a wood frame. The lower end of one pointed down, the other bent at 90 facing the flow. The belief of the time was that flow velocity at a given depth was proportional to the mass above it, meaning increasing velocity at greater depth. Recording the difference in liquid levels in the two tubes, he showed the opposite was true. Henri Darcy improved the design, with the support of Henri Bazin. Today, the Pitot tube has an important application in aerodynamics for the measurement of the airspeed of aircraft.

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Injuries Resulting From Slip-and-Fall Ac :

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ARTICLE INFORMATION :

The article is devoted to slip-and-fall accidents and injuries that they may cause. There is a list of slip-and-fall injury causes and recommendations what to do after the accident.

ARTICLE CONTENT :

Hundreds thousands of people are injured each year - some very seriously - when they slip or stumble and fall on a rough patch of ground, a wet floor or a flight of stairs. As property owners are responsible for sustaining safety on their premises and warning visitors of potential hazards, they can be liable for injuries that happen because of injury-causing conditions on their property. Slip-and-fall accidents can result in various injuries, ranging from the relatively minor to life-threatening.

A slip-and-fall accident can happen nearly anyplace, on public or private property, indoors or outdoors. A slip-and-fall injury can occur due to hazards such as: slippery tiling, unbalanced flooring, rippled carpet or foreign objects on the floor or walkway, bad weather conditions (for instance, ice, snow, or rain), uneven sidewalks, holes, badly lit or unmarked stairs or pathways Slip-and-fall injuries range in severity. A victim may suffer bruises, broken bones, and scrapes that need minimum medical care and heal comparatively fast.

Other victims may suffer a catastrophic personal injury ? a brain injury, spinal cord injury, or burn injury ? that brings on lifelong damage and requires durable medical treatment. In the worst case scenario, an injured person dies due to his or her injuries. If this happens, and the accident occurred due to the property owner's negligence, then the death is regarded as wrongful and can be litigated as such.

The sooner you file a lawsuit after the injury, the better for you. Most slip-and-fall injury claims are lodged within thirty days of the injury, since if you wait too long, it may look like you are attempting to file a frivolous suit instead of a legitimate one. If there is a hint of frivolity in your case, your suit is likely to be dismissed.

After a slip-and-fall accident you should first visit a doctor to see the extent of your injuries. This will prove that you did really suffer a slip-and-fall injury, and can be invaluable in your case. You should keep close records of the medical treatment you got, and records of any work you had to miss and how much money it cost you. Any extra costs, including medicines, transportation, physical therapy, and the like should also be thoroughly recorded. There expenses can be reimbursed, if you win the suit.

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  • June 29, 2010Date Added :
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