ScienceIQ.com

What Is a Bruise?

A bruise is a deposit of blood under the skin. It flows from tiny capillaries that break when you bump your shin on the furniture or take the batter's pop fly in the eye. The injury starts out looking red because of hemoglobin, the red pigment in red blood cells. As blood pools under the skin, light striking the red hemoglobin bounces back and ...

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WhatIsaBruise
Biology

The Rapid Movement of the Soybean Rust Pathogen

Soybean rust, caused by the fungus Phakopsora pachyrhizi, results in soybean yield losses of up to 80%. Rust diseases are named for the orange powdery spores produced in leaf pustules. They are easily ... Continue reading

SoybeanRustPathogen
Biology

Is Catnip a Drug for Cats?

Most people think of catnip as having drug-like effects on their cats. Some cats lick it, eat it or just sniff it and owners can see a definite behavior change. Catnip is actually a plant from the ... Continue reading

IsCatnipaDrugforCats
Engineering

Drip, Drip Water Clocks

Water clocks were among the earliest timekeepers that didn't depend on the observation of celestial bodies. One of the oldest was found in the tomb of the Egyptian pharaoh Amenhotep I, buried around ... Continue reading

DripDripWaterClocks
Biology

Pass the Iodized Salt Please

Have you ever wondered why common table salt contains iodine? It's because iodine is essential to your health. A diet lacking in sufficient quantities of iodine will lead to the production of a goiter ... Continue reading

IodizedSalt

Is Heartburn a Heart Burn?

IsHeartburnaHeartBurnHeartburn is a bad name for a complaint that has nothing to do with the heart. TV ads call it acid indigestion. It's a burning sensation that begins under the breastbone and moves up into the throat. The pain may be at its worst when lying down or bending over. It may feel like bitter liquid rising into the throat or mouth. If it happens frequently, doctors call it GERD (for gastroesophageal reflux disease).

It happens when acid escapes back through the valve at the top of the stomach and moves up into the esophagus. Sixty million Americans say they get it at least once a month. Heartburn is common after a big meal, and some foods--such as tomato sauce, fried food, sour beverages, coffee, or soft drinks--trigger it in some people. It's more common among people who are overweight, smoke, or drink too much alcohol. It can be associated with a stomach ulcer or a hiatal hernia, which is a bulge of part of the stomach into the chest cavity. The hernia causes the stomach valve to work improperly.

Some people find they can avoid heartburn by watching what they eat and drink, learning to relax, and not eating two or three hours before bedtime. Over-the-counter antacids are effective for many. They make stomach acid less acid. When antacids fail, doctors recommend prescription drugs. In severe cases, a surgeon can stitch the stomach valve tighter, preventing the backup of acid.