These microorganisms lack cell nuclei and are therefore prokaryotes. Archaea were initially classified as bacteria , receiving the name archaebacteria in the Archaebacteria kingdom , but this term has fallen out of use. Archaeal cells have unique properties separating them from the other two domains , Bacteria and Eukaryota. Archaea are further divided into multiple recognized phyla. Classification is difficult because most have not been isolated in a laboratory and have been detected only by their gene sequences in environmental samples. Archaea and bacteria are generally similar in size and shape, although a few archaea have very different shapes, such as the flat and square cells of Haloquadratum walsbyi.
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Stereochemistry , a subdiscipline of chemistry , involves the study of the relative spatial arrangement of atoms that form the structure of molecules and their manipulation. For this reason, it is also known as 3D chemistry—the prefix "stereo-" means "three-dimensionality". An important branch of stereochemistry is the study of chiral molecules. Stereochemistry includes methods for determining and describing these relationships; the effect on the physical or biological properties these relationships impart upon the molecules in question, and the manner in which these relationships influence the reactivity of the molecules in question dynamic stereochemistry.
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The AIY Voice Kit from Google lets you build your own natural language processor and connect it to the Google Assistant or Cloud Speech-to-Text service, allowing you to ask questions and issue voice commands to your programs. All of this fits in a handy little cardboard cube, powered by a Raspberry Pi. Then you can try some other sample code or use the Google Cloud Speech-to-Text service, which converts spoken commands into text you can use to trigger actions in your code. If you have any issues while building the kit, check out our help page or contact us at support-aiyprojects google. These instructions are for Voice Kit 2.