PBS

Chemistry 302: The Structure of the Atom

Students use the terms isotope, atomic number, mass number, and atomic mass. Atomic Theory: Structure of the Atom: Students use the terms isotope, atomic number, mass number, and atomic mass to ...
BBC

The structure of the atom - CCEA

Part of Physics (Single Science) Unit 1: Atomic and nuclear physics Most of the mass and all of the positive charge of an atom is in the nucleus. Most of an atom is empty space, (a vacuum). In 1897, ...
Nature

Structure of the CED-4–CED-9 complex provides insights into programmed cell death in Caenorhabditis elegans

Figure 1: Overall structure of the CED-4–CED-9 complex. CED-4a comprises twenty-five α-helices and eight β-strands, which are organized into four sequential domains: an amino-terminal caspase ...
Nature

Structure and mechanism of action of the hydroxy–aryl–aldehyde class of IRE1 endoribonuclease inhibitors

Endoplasmic reticulum (ER) stress activates the unfolded protein response and its dysfunction is linked to multiple diseases. The stress transducer IRE1α is a transmembrane kinase endoribonuclease ...
Nanowerk

Atom Probe Tomography: Uncovering the 3D Atomic Structure of Materials

What is Atom Probe Tomography? Atom Probe Tomography (APT) is a powerful analytical technique that provides three-dimensional (3D) imaging and chemical composition analysis of materials at the atomic ...