Why does the inside of an apple turn brown?

Why does the inside of an apple turn brown?

When an apple is cut (or bruised), oxygen is introduced into the injured plant tissue. When oxygen is present in cells, polyphenol oxidase (PPO) enzymes in the chloroplasts rapidly oxidize phenolic compounds naturally present in the apple tissues to o-quinones, colorless precursors to brown-colored secondary products.

What does fire in the hole mean?

“Fire in the hole” is a warning that an explosive detonation in a confined space is imminent. It originated with miners, who needed to warn their fellows that a charge had been set.

What fruit goes well with lamb?

Hearty lamb can stand up to both fresh and dried fruits with bolder flavors, such as apricots, cranberries, dates, figs, pomegranates, prunes, and raisins. Sweeten lamb shoulder with dried apricots when you make this Middle Eastern-Style Lamb Stew with Dried Apricots.

Is violet blue or purple?

In the traditional color wheel used by painters, violet and purple are both placed between red and blue. Purple occupies the space closer to red, between crimson and violet. Violet is closer to blue, and usually less intense and bright than purple.

When did Qatar become an independent state?

On 3 September 1971, Qatar officially gained its independence from the United Kingdom and became an independent sovereign state. In 1972, Khalifa bin Hamad Al Thani seized power in a palace coup after infighting in the ruling family.

Are hippos mean?

Crocodiles may be either aggressively displaced or killed by hippopotamuses. Hippos are also very aggressive towards humans, whom they commonly attack whether in boats or on land with no apparent provocation. They are widely considered to be one of the most dangerous large animals in Africa.

Which state has a law system based on the Napoleonic Code?

Unlike the other 49 states – civil law in Louisiana is based on the French Napoleonic Code. And, like most things in Louisiana, this system of laws is unique to the United States and has been influenced by different legal traditions including those of Spain and ancient Rome.

How deep is the deepest part of the Indian Ocean?

The Indian Ocean’s average depth is 12,990 feet (3,960 metres), and its deepest point, in the Sunda Deep of the Java Trench off the southern coast of Java, is 24,442 feet (7,450 metres).