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Amorphous calcium phosphate ( ACP) is a glassy solid that is formed from the chemical decomposition of a mixture of dissolved phosphate and calcium salts (e.g. (NH 4) 2 HPO 4 + Ca (NO 3) 2 ). The resulting amorphous mixture consists mostly of calcium and phosphate, but also contains varying amounts of water and hydrogen and hydroxide ions ...
Login. In computer security, logging in (or logging on, signing in, or signing on) is the process by which an individual gains access to a computer system or program by identifying and authenticating themselves. The user credentials are typically some form of username and a password, [1] and these credentials themselves are sometimes referred ...
As of December 2022, Facebook claimed almost 3 billion monthly active users. [7] As of October 2023, Facebook ranked as the 3rd most visited website in the world, with 22.56% of its traffic coming from the United States. [8] [9] It was the most downloaded mobile app of the 2010s.
Social media. Social media app icons on a smartphone screen. Social media are interactive technologies that facilitate the creation, sharing and aggregation of content, ideas, interests, and other forms of expression through virtual communities and networks. [1] [2] Social media refer to new forms of media that involve interactive participation.
Gmail is an email service provided by Google. As of 2019, it had 1.5 billion active users worldwide, making it the largest email service in the world. [1] It also provides a webmail interface, accessible through a web browser, and is also accessible through the official mobile application. Google also supports the use of third-party email ...
Jeff Bezos. Jeffrey Preston Bezos ( / ˈbeɪzoʊs / BAY-zohss; [2] né Jorgensen; born January 12, 1964) is an American businessman, media proprietor and investor. He is the founder, executive chairman, and former president and CEO of Amazon, the world's largest e-commerce and cloud computing company.
A stained glass panel from Canterbury Cathedral, c. 1175 – c. 1180. It depicts the Parable of the Sower, a biblical narrative. In the history of Europe, the Middle Ages or medieval period (also spelt mediaeval or mediæval) lasted approximately from 500 AD to 1500, although some prefer other start and end dates. The Middle Ages is the second of the three traditional divisions of Western ...
Active. Romeo (until 2021 PlanetRomeo) is a social network for gay, bisexual, queer and transgender people. The site was started as a hobby and was called GayRomeo in October 2002 by Planetromeo GmbH in Berlin, Germany. [3] [4] Initially only available in German the site and later its mobile app have evolved into an international platform.