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Where does digestion start?

Saliva consists of three enzymes: Amylase, Protease and Lipase. Amylase comes from the parotid gland and is used to break down carbohydrates. Protease comes from the submandibular glands and is used in the initial stages of protein digestion. Lipase comes from the sublingual glands found underneath the tongue to start fat digestion. Chewing is a very important part of digestion because the release of these three enzymes starts off the digestion process.

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Where can you read a biography of Thomas Edison?

Since 1978, the Edison Project at Rutgers University has published thousands of documents relating to the inventor of the light bulb and phonograph. Five million pages of documents chronicling the life and achievements of Edison were translated into various languages. The digital edition features 175,000 images, including documents from the Thomas Edison National Historical Park where, in 1962, Edison's West Orange, New Jersey home and lab were declared a national historical site.\nThe papers of Thomas A. Edison enable readers to learn about Edison's career, work habits and the proce..

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What is actual mechanical advantage?

There is also ideal mechanical advantage (IMA), which is when both ratios are equal, making it easier to calculate the ratio of the distance the effort moves to the distance the resistance moves. The IMA is always more because loss for friction isn't included in the calculations. The efficiency of a machine measures how much friction and other factors reduce the overall work output from the machine. A machine that works with no friction would have an efficiency rating of 100 percent. A machine with an efficiency rating of 10 percent would only perform at one-tenth of its theoretical outpu..

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What are the harmful effects of infrared radiation?

Sunlight is the main source of infrared radiation, but infrared saunas and cabins, tungsten lamps, xenon arc lamps, industrial IR lamps and iron melt from steel mill furnaces are additional sources. A variety of workers can be affected by exposure to infrared radiation, including glass blowers, smelters, firefighters and kiln workers. Industrial and medical lasers also emit levels of infrared radiation that that can place workers at risk. Infrared radiation does not penetrate deeply into tissue, and the primary targets of IR damage are the skin and eyes. Due to the transparency of the ocular m..

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What plants live on mountains?

The plants that grow on specific mountain ranges depend largely on the climate of those mountains. For instance, the San Bernardino Mountains have a Mediterranean climate and contain lush plant life, including chaparral, scrub oak, wild lilac, manzanitas and yucca plants. The more sheltered parts of the mountains contain live oak, elderberry and white alder. The rims of the mountains contain several different kinds of pine trees. However, the other side of the San Bernardino Mountains has a much dryer climate and contains pinion pines and Joshua trees.\nThe Rocky Mountains contain Rocky Mounta..

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In what stage of evolution are most stars?

Stars in the main sequence stage can be very bright. Their brightness depends upon their temperatures. The sun is a main sequence star. It is categorized as a yellow dwarf because of its relatively small size. As small stars burn up all of their hydrogen, they produce cooler temperatures and are categorized as red dwarfs. Red dwarfs are the most common type of stars. Red giants are cooling stars that are massive in size.

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What is the biggest planet?

Jupiter's atmosphere is very violent, with extremely high winds and storms that can form in a matter of minutes. As of 2014, the largest storm on Jupiter, the Red Spot, has been raging since the 1600s and expands and contracts over several thousand miles. While Jupiter is the largest planet in the solar system, scientists estimate that similar planets in other systems could easily be 15 times as big as Jupiter.

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What is the difference between a crater and a caldera?

Volcanic craters tend to be relatively small and circular, while calderas can be almost any shape and tend to be large. Craters form when volcanic ejecta emerges from an active site and recedes into the subterranean magma chamber. Calderas can begin as craters, but they widen and deepen when their underground magma chamber empties. This can happen explosively, with a sudden eruption that blasts away the surface strata, or it can happen gradually as the chamber drains. Once the underground chamber is empty, the ceiling above it is largely unsupported and prone to collapse. It is this process of..

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What are some untraceable poisons?

Toxicology tests are not normally sensitive enough to detect the types of poisons listed above. If, however, foul play is suspected in a criminal investigation, then further testing is conducted, and the poisons are most likely to be detected.\nIts discreteness and potent nature give arsenic the title of "king of poisons." As it is extremely difficult to detect, it is often used as murder weapon and is featured as a common trope in literary fiction.

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What unit is gas measured in?

In a commercial context, natural gas is measured in cubic feet, while gasoline is sold at the pump in gallons. Because of differences in the amount of energy produced from various energy sources and the differences in commercial measurements, comparing two energy sources requires that they both be measured in terms of energy units. British thermal units are used when comparing energy sources.

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