Energy & Green Tech
Bipolar membranes (BPMs) are a class of ion-exchange membranes typically comprising a cation- and an anion-exchange layer. While these membranes have recently been integrated in various electrochemical devices for a wide ...
Energy & Green Tech
From cell phones, to solar power, to electric cars, humanity is increasingly dependent on batteries. As demand for safe, efficient, and powerful energy storage continues to rise, so too does the call for promising alternatives ...
Mar 2, 2020
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Engineering
Needle pricks not your thing? A team of scientists at the University of California, Berkeley, is developing wearable skin sensors that can detect what's in your sweat.
Aug 16, 2019
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277
Energy & Green Tech
From electric cars that travel hundreds of miles on a single charge to chainsaws as mighty as gas-powered versions, new products hit the market each year that take advantage of recent advances in battery technology.
Jun 19, 2018
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Electronics & Semiconductors
Memory, or the ability to store information in a readily accessible way, is an essential operation in computers and human brains. A key difference is that while brain information processing involves performing computations ...
Mar 19, 2024
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43
Energy & Green Tech
Layered lithium cobalt oxide, a key component of lithium-ion batteries, has been synthesized at temperatures as low as 300°C and durations as short as 30 minutes.
Oct 24, 2023
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74
Energy & Green Tech
Scientists from NTU Singapore have developed a flexible battery as thin as a human cornea, which stores electricity when it is immersed in saline solution, and which could one day power smart contact lenses.
Aug 24, 2023
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154
Engineering
Automated sprinklers, lighting, and security systems have been commonplace in homes and offices for several decades. In recent years, however, they have become increasingly efficient at anticipating user needs and optimizing ...
Mar 29, 2023
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83
Energy & Green Tech
Researchers from Tokyo Metropolitan University have developed a new carbon capture system that removes carbon dioxide directly from the atmosphere with unprecedented performance. Isophorone diamine (IPDA) in a "liquid-solid ...
May 30, 2022
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389
Energy & Green Tech
Scientists at Nanyang Technological University, Singapore (NTU Singapore) have developed a pollen-based "paper" that, after being printed on, can be "erased" and reused multiple times without any damage to the paper.
Apr 5, 2022
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469
Potassium (pronounced /pɵˈtæsiəm/) is the chemical element with the symbol K (Latin: kalium, from Arabic: القَلْيَه al-qalyah “plant ashes”, cf. Alkali from the same root), atomic number 19, and atomic mass 39.0983. Potassium was first isolated from potash. Elemental potassium is a soft silvery-white metallic alkali metal that oxidizes rapidly in air and is very reactive with water, generating sufficient heat to ignite the evolved hydrogen.
Potassium in nature occurs only as ionic salt. As such, it is found dissolved in seawater, and as part of many minerals. Potassium ion is necessary for the function of all living cells, and is thus present in all plant and animal tissues. It is found in especially high concentrations in plant cells, and in a mixed diet, it is most highly concentrated in fruits.
In many respects, potassium and sodium are chemically similar, although they have very different functions in organisms in general, and in animal cells in particular.
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