Electronics & Semiconductors
A team led by Prof. Yao Hongbin from the University of Science and Technology of China (USTC) developed a high efficiency, high brightness warm white light-emitting diode (LED) based on copper-iodide cluster hybrids. Their ...
Mar 25, 2024
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13
Software
Model checking is one of the most successful computer science achievements in the last few decades. This is why Edmund M. Clarke, E. Allen Emerson, and Joseph Sifakis were honored with the 2007 A.M. Turing Award for their ...
Jul 28, 2023
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1
Energy & Green Tech
Solar cells made from perovskite, a material that is able to harvest sunlight and convert it to electricity, hold great potential as a replacement for silicon solar cells.
Feb 23, 2023
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42
Energy & Green Tech
As lithium-ion batteries continue to decrease in price, they are quickly replacing the lead-acid batteries traditionally used in cars and other vehicles. This is creating a sudden abundance of used lead-acid batteries, which ...
Feb 2, 2023
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17
Electronics & Semiconductors
New materials that can both harvest and emit light offer exciting potential for technologies that range from solar cells to TV and display screens. In a new study, researchers have developed a new way of enhancing the stability ...
Dec 13, 2022
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82
Business
Research and development (R&D) has been vital to developing new clean energy technologies. Yet for technologies to advance from the research lab to viable commercial products many obstacles must be overcome. To replicate ...
Dec 7, 2022
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17
Engineering
Researchers at the University of Virginia School of Engineering and Applied Science have discovered a way to make a versatile thermal conductor, with promise for more energy-efficient electronic devices, green buildings and ...
Jun 21, 2022
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54
Energy & Green Tech
Batteries are in increasing demand because of their use in electric vehicles, consumer electronics, and grid scale storage. Their ubiquity is due, in part, to the rapid shift toward producing and using clean energy to replace ...
Feb 1, 2022
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5
Energy & Green Tech
Since the discovery of electricity, inventors have struggled with how to store it. Batteries emerged relatively quickly as the most common way to preserve energy chemically, but from portability to rechargeability, it has ...
Jan 25, 2022
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12
In video games, there's probably no studio that generates more excitement than FromSoftware.
Aug 30, 2021
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416
Lead (pronounced /ˈlɛd/) is a main-group element with symbol Pb (Latin: plumbum) and atomic number 82. Lead is a soft, malleable poor metal, also considered to be one of the heavy metals. Lead has a bluish-white color when freshly cut, but tarnishes to a dull grayish color when exposed to air. It has a shiny chrome-silver luster when melted into a liquid.
Lead is used in building construction, lead-acid batteries, bullets and shot, weights, and is part of solder, pewter, fusible alloys and radiation shields. Lead has the highest atomic number of all stable elements, although the next element, bismuth, has a half-life so long (longer than the estimated age of the universe) it can be considered stable. Like mercury, another heavy metal, lead is a potent neurotoxin that accumulates in soft tissues and bone over time. Lead poisoning was documented in ancient Rome, Greece, and China.
This text uses material from Wikipedia, licensed under CC BY-SA
