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Cryolophosaurus (/ ˌ k r aɪ ə ˌ l oʊ f ə ˈ s ɔːr ə s / or / k r aɪ ˌ ɒ l ə f ə ˈ s ɔːr ə s /; KRY-ə-LOH-fə-SAWR-əs) is a genus of large theropod dinosaur known from only a single species Cryolophosaurus ellioti, from the early Jurassic of Antarctica. It was one of the largest theropods of the Early Jurassic, with the ...
The ability to fine-tune pi stacking interactions would be useful in numerous synthetic efforts. One example would be to increase the binding affinity of a small-molecule inhibitor to an enzyme pocket containing aromatic residues. The effects of heteroatoms [7] and substituents on pi stacking interactions is difficult to model and a matter of ...
Parts-per-million cube of relative abundance by mass of elements in an average adult human body down to 1 ppm. About 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium ...
Two p-orbitals forming a π-bond. Pi bonds are usually weaker than sigma bonds.The C-C double bond, composed of one sigma and one pi bond, [1] has a bond energy less than twice that of a C-C single bond, indicating that the stability added by the pi bond is less than the stability of a sigma bond.
An adaptation of the popular sci-fi book series by Liu Cixin, 3 Body Problem follows a group of scientists who come in contact with an extraterrestrial civilization that could threaten humanity.
In non-polar covalent bonds, the electronegativity difference between the bonded atoms is small, typically 0 to 0.3. Bonds within most organic compounds are described as covalent. The figure shows methane (CH 4), in which each hydrogen forms a covalent bond with the carbon. See sigma bonds and pi bonds for LCAO descriptions of such bonding. [22]
Size of the largest known (left) and holotype (right) specimens compared to a human. Dilophosaurus was one of the earliest large predatory dinosaurs, a medium-sized theropod, though small compared to some of the later theropods. [2] [5] It was also the largest known land-animal of North America during the Early Jurassic. [6]
Coelophysis (/ s ɛ ˈ l ɒ f ɪ s ɪ s / se-lOF-iss-iss traditionally; / ˌ s ɛ l oʊ ˈ f aɪ s ɪ s / SEL-oh-FY-siss or / ˌ s iː l oʊ ˈ f aɪ s ɪ s / SEE-loh-FY-siss, as heard more commonly in recent decades [3]) is a genus of coelophysid theropod dinosaur that lived approximately 215 to 208.5 million years ago during the Late Triassic period from the middle to late Norian age in what ...