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food preservation

(Encyclopedia)food preservation, methods of preparing food so that it can be stored for future use. Because most foods remain edible for only a brief period of time, people since the earliest ages have experimented...

liquid

(Encyclopedia)liquid, one of the three commonly recognized states in which matter occurs, i.e., that state, as distinguished from solid and gas, in which a substance has a definite volume but no definite shape. T...

Adams, Henry

(Encyclopedia)Adams, Henry, 1838–1918, American writer and historian, b. Boston; son of Charles Francis Adams (1807–86). He was secretary (1861–68) to his father, then U.S. minister to Great Britain. Upon his...

nationalism

(Encyclopedia)nationalism, political or social philosophy in which the welfare of the nation-state as an entity is considered paramount. Nationalism is basically a collective state of mind or consciousness in which...

church and state

(Encyclopedia)church and state, the relationship between the religion or religions of a nation and the civil government of that nation, especially the relationship between the Christian church and various civil gov...

electrolysis

(Encyclopedia)CE5 Electrolysis: In a typical reaction electrodes are placed in a solution of hydrogen chloride, HCl, which contains both hydrogen and chlorine ions. The battery removes electrons from the anode, ...

Hegel, Georg Wilhelm Friedrich

(Encyclopedia)Hegel, Georg Wilhelm Friedrich gāˈôrkh vĭlˈhĕlm frēˈdrĭkh hāˈgəl [key], 1770–1831, German philosopher, b. Stuttgart; son of a government clerk. Hegel has influenced many subsequent p...

Mamluk

(Encyclopedia)Mamluk or Mameluke mămˈəlo͞ok [key] [Arab.,=slaves], a warrior caste dominant in Egypt and influential in the Middle East for over 700 years. Islamic rulers created this warrior caste by collectin...

caliphate

(Encyclopedia)caliphate kălˈĭfˌ [key], the spiritual head and temporal ruler of the Islamic state. In principle, Islam is theocratic: when Muhammad died, a caliph [Arab.,=successor] was chosen to rule in his pl...

refrigeration

(Encyclopedia)CE5 Compression system of refrigeration refrigeration, process for drawing heat from substances to lower their temperature, often for purposes of preservation. Refrigeration in its modern, portabl...