Japan's 'flying car' gets off ground, with a person aboard (Video)
The decades-old dream of zipping around in the sky as simply as driving on highways may be becoming less illusory.
Aug 28, 2020
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Hi Tech & Innovation
The decades-old dream of zipping around in the sky as simply as driving on highways may be becoming less illusory.
Aug 28, 2020
23
78013
Energy & Green Tech
Scientists have designed and constructed a prototype for a new solar cell that integrates multiple cells stacked into a single device capable of capturing nearly all of the energy in the solar spectrum. The new design converts ...
Jul 12, 2017
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Energy & Green Tech
UC Berkeley researchers just broke another record in photovoltaic efficiency, an achievement that could lead to an ultralight engine that can power drones for days.
Jul 26, 2019
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Energy & Green Tech
Scientist have developed a lithium ion battery that charges at an elevated temperature to increase reaction rate but keeps the cell cool during discharge, showing the potential to add 200 miles of driving range to an electric ...
Oct 30, 2019
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Energy & Green Tech
A team of engineers led by 94-year-old John Goodenough, professor in the Cockrell School of Engineering at The University of Texas at Austin and co-inventor of the lithium-ion battery, has developed the first all-solid-state ...
Feb 28, 2017
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Energy & Green Tech
A breakthrough in solar power could make it cheaper and more commercially viable, thanks to research at the University of Warwick.
Nov 23, 2016
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Hardware
Physicists at Lancaster University have demonstrated that their invention of a new type of memory device could transform the way computers, smartphones and other gadgets work.
Jan 20, 2020
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Energy & Green Tech
EPFL researchers are pushing the limits of perovskite solar cell performance by exploring the best way to grow these crystals.
Jun 09, 2016
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Engineering
In a step closer to skyscrapers that serve as power sources, a team led by University of Michigan researchers has set a new efficiency record for color-neutral, transparent solar cells.
Aug 17, 2020
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Computer Sciences
(Tech Xplore)—A team of researchers at the University of Wisconsin has developed a pair of glasses that allows the wearer to have tetrachromatic vision. In their paper uploaded to the arXiv preprint sever, the group describes ...
Mar 23, 2017 report
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The cell is the structural and functional unit of all known living organisms. It is the smallest unit of an organism that is classified as living, and is often called the building block of life. Some organisms, such as most bacteria, are unicellular (consist of a single cell). Other organisms, such as humans, are multicellular. (Humans have an estimated 100 trillion or 1014 cells; a typical cell size is 10 µm; a typical cell mass is 1 nanogram.) The largest known cell is an unfertilized ostrich egg cell.
In 1835 before the final cell theory was developed, a Czech Jan Evangelista Purkyně observed small "granules" while looking at the plant tissue through a microscope. The cell theory, first developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann, states that all organisms are composed of one or more cells. All cells come from preexisting cells. Vital functions of an organism occur within cells, and all cells contain the hereditary information necessary for regulating cell functions and for transmitting information to the next generation of cells.
The word cell comes from the Latin cellula, meaning, a small room. The descriptive name for the smallest living biological structure was chosen by Robert Hooke in a book he published in 1665 when he compared the cork cells he saw through his microscope to the small rooms monks lived in.
This text uses material from Wikipedia, licensed under CC BY-SA