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An electron-withdrawing group (EWG) is a group or atom that has the ability to draw electron density toward itself and away from other adjacent atoms. [1] This electron density transfer is often achieved by resonance or inductive effects.
An electron donating group (EDG) or electron releasing group (ERG, Z in structural formulas) is an atom or functional group that donates some of its electron density into a conjugated π system via resonance (mesomerism) or inductive effects (or induction)—called +M or +I effects, respectively—thus making the π system more nucleophilic.
In October 2012, more than 8 million people watched Felix Baumgartner's jump from the edge of space as a live stream on YouTube. [64] In May 2013, creation of live streams was opened to verified users with at least 1,000 subscribers; in August of the same year the number was reduced to 100 subscribers, [65] and in December the limit was removed ...
You may be familiar with the Environmental Working Group (EWG) because they release a list of the most pesticide-filled produce every year called The Dirty Dozen. They also establish the produce ...
Delocalizing the radical ion stabilizes the transition state structure. As a result, the energy of activation decreases, enhancing the rate of the overall reaction. According to the captodative effect, the rate of a reaction is the greatest when both the EDG and EWG are able to delocalize the radical ion in the transition state structure. [7]
The EWG prides itself in providing research and information to allow people to lead healthier lives. Every year, the nonprofit releases a list called 'Dirty Dozen,' which includes a ranking of ...
Livestreaming, live-streaming, or live streaming is the streaming of video or audio in real time or near real time. While often referred to simply as streaming , the real-time nature of livestreaming differentiates it from other non- live broadcast forms of streamed media such as video-on-demand , vlogs and video-sharing platforms such as ...
YouTube Live was a 2008 event streamed live on the Internet from San Francisco and Tokyo. It was launched November 22–23, 2008. It was hosted by a variety of YouTube celebrities, including The Black Eyed Peas rapper will.i.am, Tom Dickson of Will It Blend, Michael Buckley, The Happy Tree Friends, Fred, Smosh, Esmée Denters, Bo Burnham and singer Katy Perry among others. [1]