The Maillard reaction (/maɪˈjɑːr/ MY-ar; French: [majaʁ]) is a chemical reaction between amino acids and reducing sugars to create melanoidins, the compounds that give browned food its distinctive flavor. Seared steaks, fried dumplings, cookies and other kinds of biscuits, breads, toasted marshmallows, falafel and many other foods undergo this reaction. It is named after French […]
Alternating tread stairs—also known as alternating tread devices (ATDs) or, commercially, “Lapeyre stairs”—are steep stair systems designed to occupy significantly less horizontal space than conventional staircases. They achieve this compression by staggering the tread surfaces so that each step supports only one foot, alternating left and right. They are not a novelty. They are a
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Plant pathology is the scientific study of plant diseases, including their causes, mechanisms of infection, epidemiology, and control. It integrates botany, microbiology, molecular biology, genetics, ecology, and agronomy to understand how pathogens interact with plants and how disease impacts ecosystems and agriculture. The discipline addresses diseases caused by fungi, oomycetes, bacteria, viruses, viroids, nematodes, and
George Washington (February 22, 1732 – December 14, 1799) was an American military commander, statesman, and political leader who served as the first President of the United States (1789–1797). He presided over the Constitutional Convention of 1787, commanded the Continental Army to victory during the American Revolutionary War, and established enduring precedents for executive authority
A monarchy is a form of government in which supreme authority is vested in a single individual—the monarch—whose position is typically hereditary and often lifelong. The monarch may serve as head of state, head of government, or both, depending on the constitutional structure. The defining characteristic of monarchy is dynastic succession: political authority passes through
The Constitutional Convention took place in Philadelphia from May 25 to September 17, 1787.
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The Articles of Confederation, officially the Articles of Confederation and Perpetual Union, was an agreement and early body of law in the Thirteen Colonies, which served as the nation’s first frame of government during the American Revolution. It was debated by the Second Continental Congress at present-day Independence Hall in Philadelphia between July 1776 and
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The Siege of Yorktown, also known as the Battle of Yorktown and the surrender at Yorktown, was the final major land engagement of the American Revolutionary War. It was won decisively by the Continental Army, led by George Washington, with support from the Marquis de Lafayette and French Army troops, led by the Comte de