At the same time the atmosphere is almost opaque to the earth’s thermal radiation (owing to the presence of carbon dioxide and water vapors in the atmosphere—the greenhouse effect). If the earth did not have an atmosphere the average temperature of its surface would be -23°C, while in...
The objective was to evaluate the lubrication effectiveness of these coatings when subjected to sliding against steel surfaces, in the presence of lubricants with ILs as additives compared to regularly used base oil (BO). Comparing the samples lubricated with ILs and base oil along with various ...
First, we identify ‘safe’ boundaries at subglobal and global scales for “maintain[ing] and enhanc[ing] the stability and resilience of the Earth system over time, thereby safeguarding its functions and ability to support humans and all other living organisms”4. To determine safe boundaries, ...
Human presence and activity are confined to Earth, making it the center of human culture, history, and civilization. In contrast, Saturn represents a frontier for scientific exploration and study, with missions like Cassini providing detailed data about the planet, its rings, and moons, expanding ...
Gold has both economic and cultural significance to human societies but, as Liang Zhang and David Groves explain, we owe its presence in the Earth’s crust to repeating cycles of plate tectonics. Liang Zhang &David I. Groves Research Briefing|07 November 2024 ...
et al. Waste SMD LEDs from End-of-Life Residential LED Lamps: Presence and Characterisation of Rare Earth Elements and Precious Metals as a Function of Correlated Colour Temperature. Recycling, 2024, 9(6): 128. 必应学术 49. Biandolino, F., Prato, E., Grattagliano, A. et al. ...
At the same time the atmosphere is almost opaque to the earth’s thermal radiation (owing to the presence of carbon dioxide and water vapors in the atmosphere—the greenhouse effect). If the earth did not have an atmosphere the average temperature of its surface would be -23°C, while in...
Supergirl tried to keep her continued presence on Earth a secret, but she quickly earned the attention of Project 7734. She fought against Reactron for the second time, defeating him in a manner similar to how she stopped him when they first fought. She also fought against Superwoman, whom ...
The polls had barely closed and vote counting, in the presence of 910 international observers, was still in progress when a concerted campaign was launched abroad to dispute Maduro’s victory as fraudulent and to put forward the assertion that it was the opposition candidate who had actually won...
7 Alternatively, 2,2′-bipyridyl anionic radical rare-earth or actinide metal complexes can also be obtained by treatment of the corresponding complexes with 2,2′-bipyridine in the presence of KC8 (Scheme 2, method 2).8 Following these two methods, a range of rare-earth metal and actinide...