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Photosynthesis ( / ˌfoʊtəˈsɪnθəsɪs / FOH-tə-SINTH-ə-sis) [1] is a system of biological processes by which photosynthetic organisms, such as most plants, algae, and cyanobacteria, convert light energy, typically from sunlight, into the chemical energy necessary to fuel their activities.
In Conway's Game of Life (and related cellular automata ), the speed of light is a propagation rate across the grid of exactly one step (either horizontally, vertically or diagonally) per generation. In a single generation, a cell can only influence its nearest neighbours, and so the speed of light (by analogy with the speed of light in physics ...
Cellular senescence is a phenomenon characterized by the cessation of cell division. [1] [2] [3] In their experiments during the early 1960s, Leonard Hayflick and Paul Moorhead found that normal human fetal fibroblasts in culture reach a maximum of approximately 50 cell population doublings before becoming senescent.
Nobili cellular automata. Nobili cellular automata (NCA) are a variation of von Neumann cellular automata (vNCA), in which additional states provide means of memory and the interference-free crossing of signal. Nobili cellular automata are the invention of Renato Nobili, a professor of physics at the University of Padova in Padova, Italy.
Intracellular transport is an overarching category of how cells obtain nutrients and signals. One very well understood form of intracellular transport is known as endocytosis. Endocytosis is defined as the uptake of material by the invagination of the plasma membrane. [4] More specifically, eukaryotic cells use endocytosis of the uptake of ...
The LG LG VX8300 was one of Verizon's most popular mobile phones. This phone contains the following features: 1.3 megapixel camera with LED flash and self-portrait capability. Video capture and playback ( 3GP) up to size of available memory. TFT LCD with 176×220 pixels supporting 262,000 colors.
Wikipedia began as a complementary project for Nupedia, a free online English-language encyclopedia project whose articles were written by experts and reviewed under a formal process. [20] It was founded on March 9, 2000, under the ownership of Bomis, a web portal company.
Nissl bodies occur in the somata and dendrites of neurons, though not in the axon or axon hillock. [6] They vary in size, shape, and intracellular location; they are most conspicuous in the motor neurons of the spinal cord and brainstem, where they appear as large, blocky assemblies. [5] In other neurons, they may be smaller, and in some (such ...
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