Microtome | instrument | Britannica
WebMicrotome | instrument | Britannica. Contents. microtome. instrument. Also known as: ultramicrotome. Learn about this topic in these articles: invention by His. In Wilhelm His. In 1865 His invented the microtome, a mechanical device used to slice thin tissue sections for microscopic examination.
Microscope | Types, Parts, History, Diagram, & Facts | Britannica
Web3 days ago · The most familiar type of microscope is the optical, or light, microscope, in which glass lenses are used to form the image. Optical microscopes can be simple, consisting of a single lens, or compound, consisting of several optical components in line. The hand magnifying glass can magnify about 3 to 20×. Single-lensed simple …
Atom | Definition, Structure, History, Examples, Diagram, & Facts
WebMay 20, 2024 · atom, the basic building block of all matter and chemistry. Atoms can combine with other atoms to form molecules but cannot be divided into smaller parts by ordinary chemical processes. Most of the atom is empty space. The rest consists of three basic types of subatomic particles: protons, neutrons, and electrons.
Michael Faraday | Biography, Inventions, & Facts | Britannica
WebApr 23, 2024 · Michael Faraday (born September 22, 1791, Newington, Surrey, England—died August 25, 1867, Hampton Court, Surrey) was an English physicist and chemist whose many experiments contributed greatly to the understanding of electromagnetism. Faraday, who became one of the greatest scientists of the 19th …
Mitochondrion | Definition, Function, Structure, & Facts
WebMay 10, 2024 · What is a mitochondrion? What do the mitochondria do? Where are the mitochondria found? mitochondrion, membrane-bound organelle found in the cytoplasm of almost all eukaryotic cells (cells with clearly defined nuclei), the primary function of which is to generate large quantities of energy in the form of adenosine triphosphate (ATP).
Science | Definition, Disciplines, & Facts | Britannica
WebMay 25, 2024 · science, any system of knowledge that is concerned with the physical world and its phenomena and that entails unbiased observations and systematic experimentation. In general, a science involves a pursuit of knowledge covering general truths or the operations of fundamental laws. Science can be divided into different branches based …
Chromosome | Structure & Function | Britannica
Web1 day ago · Recent News. May 29, 2024, 11:46 PM ET (National Institutes of Health (NIH) (.gov)) Scientists generate the first complete chromosome sequences from non-human primates. chromosome, the microscopic threadlike part of the cell that carries hereditary information in the form of genes. A defining feature of any chromosome is its …
Microprocessor | Definition & Facts | Britannica
WebApr 25, 2024 · Robert Noyce. Related Topics: Pentium. Intel 1103. M1. register. Intel 8088. microprocessor, any of a type of miniature electronic device that contains the arithmetic, logic, and control circuitry necessary to perform the functions of a digital computer’s central processing unit.
Microsoft Corp. summary | Britannica
WebMicrosoft Corp., U.S. computer firm, the leading developer of personal-computer software systems and applications. Microsoft, headquartered in Redmond, Wash., also publishes books and multimedia titles and manufactures hardware. It was founded in 1975 by Bill Gates and Paul G. Allen (b. 1954), who adapted BASIC for use on personal computer s.
Atmosphere | Definition, Layers, & Facts | Britannica
WebMay 15, 2024 · atmosphere, the gas and aerosol envelope that extends from the ocean, land, and ice -covered surface of a planet outward into space. The density of the atmosphere decreases outward, because the gravitational attraction of the planet, which pulls the gases and aerosols (microscopic suspended particles of dust, soot, smoke, or …
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