Image
from article Mustard
Black mustard (Brassica nigra). (Photo courtesy of Jennifer Anderson, USDA–NRCS PLANTS Database)
Search Results
Search Results
Refine this search
Search result paging links
11,089 results
Image
from article Forensic botany
Surface of a green bean pod, showing its spines using (a) light microscope (courtesy of David O. Norris) and (b) scanning electron microscope (courtesy of Meredith Lane).
Image
from article Exposure meter
Basic exposure meter circuits. (a) Photovoltaic type circuit. (b) Photoconductive type circuit.
Image
from article Anthropology
Fossil skulls of four different species of Homo (clockwise from upper left): Homo neanderthalensis, Homo antecessor, Homo erectus, and Homo sapiens. Each skull shows different anatomical variations. (Credit: creativemarc/Shutterstock)
Image
from article Anthropology
The indigenous inhabitants of Siberut Island (West Sumatra, Indonesia) are known as the Mentawai people. They live a seminomadic hunter-gatherer life in the coastal and rainforest environments of the island. (Credit: Chanwit Whanset/Shutterstock)
Image
from article Donor atom
Pentavalent donor atom, phosphorus (P), in the elemental semiconductor silicon (Si). (a) Phosphorus atom in a substitutional position, that is, replacing silicon, a tetravalent host atom, by completing the four tetrahedral covalent bonds with its…
Image
from article Pain
Neurophysiology of incoming pain. Sensation from peripheral receptors travels along specific pain nerves, and is modulated throughout the spinal cord and brain. (Copyright © McGraw-Hill Education)
Image
from article Radiation damage to materials
The five principal mechanisms of radiation damage are ionization, vacancies, interstitials, impurity atoms, and thermal spikes. Diagram shows how a neutron might give rise to each in copper. Grid-line intersections are equilibrium positions for…
Image
from article Radiation damage to materials
Sensitivity of engineering materials to radiation. Levels are approximate and subject to variation. Changes are in most cases at least 10%. (After O. Sisman and J. C. Wilson, Nucleonics, 14:58–65, 1956)
Image
from article Asian vegetables
A head of Chinese cabbage. (Credit: Jiang Hongyan/Shutterstock)
