Edit this page Watch this page Read in another language Microwave This article is about the electromagnetic wave . For the cooking appliance, see Microwave oven . For other uses, see Microwaves (disambiguation) . A telecommunications tower with a variety of dish antennas for microwave relay links on Frazier Peak , Ventura County, California . The atmospheric attenuation of microwaves and far infrared radiation in dry air with a precipitable water vapor level of 0.001 mm. The downward spikes in the graph correspond to frequencies at which microwaves are absorbed more strongly. This graph includes a range of frequencies from 0 to 1 THz; the microwaves are the subset in the range between 0.3 and 300 gigahertz. Microwaves are a form of electromagnetic radiation with wavelengths ranging from one meter to one millimeter; with frequencies between 300 MHz (100...
Edit Watch this page Read in another language Blockchain Blockchain formation. The main chain (black) consists of the longest series of blocks from the genesis block (green) to the current block. Orphan blocks (purple) exist outside of the main chain. Bitcoin network data A blockchain , [1] [2] [3] originally block chain , [4] [5] is a continuously growing list of records , called blocks , which are linked and secured using cryptography . [1] [6] Each block typically contains a hash pointer as a link to a previous block, [6] a timestamp and transaction data. [7] By design, blockchains are inherently resistant to modification of the data. The Harvard Business Review describes it as "an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way". [8] For use as a distributed ledger...
Edit Watch this page Read in another language Metabolism "Cell metabolism" redirects here. For the journal, see Cell Metabolism . For the architectural movement, see Metabolism (architecture) . Structure of adenosine triphosphate (ATP), a central intermediate in energy metabolism Metabolism (from Greek : μεταβολή metabolē , "change") is the set of life -sustaining chemical transformations within the cells of organisms . The three main purposes of metabolism are the conversion of food/fuel to energy to run cellular processes, the conversion of food/fuel to building blocks for proteins , lipids , nucleic acids , and some carbohydrates , and the elimination of nitrogenous wastes . These enzyme -catalyzed reactions allow organisms to grow and reproduce, maintain their structures, and respond to their environments. The word metabolism can also refer to the sum of ...
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