Carol S. Dweck: Award for Distinguished Scientific Contributions

    The American Psychologist
    |November 16, 2011
    PubMed

    Related Concept Videos

    The DNA Helix01:07

    The DNA Helix

    Deoxyribonucleic acid, or DNA, is the genetic material responsible for passing traits from generation to generation in all organisms and most viruses. DNA is composed of two strands of nucleotides that wind around each other to form a spring-like structure called a double helix. However, the double helix is not perfectly symmetrical. Instead, there are regularly occurring grooves in the structure. The major groove occurs where the sugar-phosphate backbones are relatively far apart. This space...
    Diversity in Cell Signaling Responses01:22

    Diversity in Cell Signaling Responses

    The physiological function of a cell and cellular communication are outcomes of a range of extrinsic signals, intracellular signaling pathways, and cellular responses. No two cell types express the same repertoire of signaling components. Receptors are highly selective for their cognate ligands, but once activated, they can alter multiple cellular processes such as DNA transcription, protein synthesis, and metabolic activity. 
    Graded and Abrupt Responses
    Some signaling systems generate...
    Diels–Alder Reaction: Characteristics of Dienes01:29

    Diels–Alder Reaction: Characteristics of Dienes

    The Diels–Alder reaction brings together a diene and a dienophile to form a six-membered ring. Both components have unique characteristics that influence the rate of the reaction.
    Characteristics of the diene
    Conformation
    The simplest example of a diene is 1,3-butadiene, an acyclic conjugated π system. At room temperature, the molecule exists as a mixture of s-cis and s-trans conformers by virtue of rotation around the carbon–carbon single bond. Although the s-trans isomer is more stable, the...
    Intramolecular Claisen Condensation of Dicarboxylic Esters: Dieckmann Cyclization01:13

    Intramolecular Claisen Condensation of Dicarboxylic Esters: Dieckmann Cyclization

    Dieckmann cyclization is an intramolecular Claisen condensation of diesters. The reaction occurs in the presence of a base and generates a cyclic β-ketoester as the final product. Commonly, 1, 6 and 1, 7-diesters are preferred substrates for the reaction since the generated five, and six-membered cyclic β-keto esters are particularly more stable.
    Molecular Geometry and Dipole Moments02:36

    Molecular Geometry and Dipole Moments

    The VSEPR theory can be used to determine the electron pair geometries and molecular structures as follows:
    X-ray Diffraction of Biological Samples01:10

    X-ray Diffraction of Biological Samples

    X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
    According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are  scattered by the electron clouds around the sample atoms. The  X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal crystal...