Image
from article Branched polymer
Steps in the synthesis of a starburst polymer. s = surface. o = interior. fr = reactive group. fp = protected group.
Search Results
Search Results
Refine this search
Search result paging links
4,413 results
Image
from article Tangent
Line L tangent to curve C at P.
Image
from article Civet
Owston's palm civet (Chrotogale owston). (Photo copyright © by Mark Kostich)
Image
from article Heterocyclic polymer
Structural units in linear polymers. (a) Simple linear polymer. (b) Stepladder polymer. (c) Ladder polymer.
Image
from article Heterocyclic polymer
Image
from article Patellogastropoda
Whitecap limpet (Acmaea mitra). (Photo by Douglas Eernisse)
Image
from article Patellogastropoda
Ribbed Mediterranean limpet (Patella ferruginea). (Photo by Georgina Rivera Ingraham)
Image
from article Patellogastropoda
Radula of the patellogastropod Notoacmea scapha.
Image
from article Intermolecular forces
Schematic diagram of intermolecular interaction. (a) There is negligible interaction between atoms that are 1 nm apart. (b) For atoms separated by about 0.8 nm or less, attractive dispersion forces result from correlated fluctuations of the electron…
Image
from article Beef cattle production
Angus bull with overall carcass merit. (Credit: Jim Koch/Agricultural Research Service, U.S. Department of Agriculture)
Image
from article Beef cattle production
Brahman (zebu) bull (Bos indicus). (Credit: Scott Bauer/Agricultural Research Service, U.S. Department of Agriculture)
Image
from article Beef cattle production
An exemplary purebred Hereford bull. (Credit: Michael MacNeil/Agricultural Research Service, U.S. Department of Agriculture)
Image
from article Beef cattle production
A group of Simmental cows. (Credit: Iowa Beef Industry Council)
Image
from article Beef cattle production
Three Charolais heifers. (Credit: Darcy Vial/Farm Service Agency, U.S. Department of Agriculture)
Image
from article Beef cattle production
In order to attain market weight, cattle are fed often in feedlots. (Credit: Dave Hughes/Getty Images)
Image
from article Beef cattle production
In the United States, beef animals used for food must be inspected extensively pre- and postmortem by federal officials. (Credit: Bob Nichols/U.S. Department of Agriculture)
Image
from article Fruit, tree
Apple trees growing in an orchard. (Photo by Charles Rondeau)
Image
from article Fruit, tree
Apple scab on fruit. This disease, caused by the fungus Venturia inaequalis, leads to unsightly blemishes on ripe apples. (Photo courtesy of the University of Georgia Plant Pathology Archive)
Image
from article Fruit, tree
Brown rot, caused by the fungus Monilinia fructicola, on a peach. (Photo by Jonas Janner Hamann, Universidade Federal de Santa Maria, Brazil)
Image
from article Fruit, tree
Fire blight, caused by the bacterium Erwinia amylovora, on apple fruits and leaves. (Photo courtesy of the University of Georgia Plant Pathology Archive)
Image
from article Fruit, tree
Blue mold (Penicillium italicum) on a rotting orange. (Photo by G. L. Barron)
Image
from article Bicosoecida
A bicosoecid, Codomonas annulata.
Image
from article Rhizocephala
Loxothylacus texanus (arrow) attached to the abdomen of the blue crab (Callinectes sapidus). (After E. G. Reinhard, Parasitic castration of Callinectes, Exp. Parasitol., 5:79–107, 1956)
Image
from article Belladonna
Close-up view of the belladonna plant (Atropa belladonna), showing the leaves and berries, which are toxic. (Photo courtesy of Leo Michels)
Image
from article Polychaeta
Examples of polychaetes. (a) Platynereis dumerilii antipoda. (b) Branchiomma sp. (c) Arenicola bombayensi. (After P. L. Beesley et al., 2000)
Image
from article Polychaeta
Platynereis dumerilii antipoda, showing the antero-dorsal end with the pharynx everted. (After P. L. Beesley et al., 2000)
Image
from article Polychaeta
Hololepidella laingensis; scanning electron microscope view of the anterior end with the pharynx everted. An: antennae; Pa: palps; Prb: proboscis; Prs: prostomium; TeC: tentacular cirrus. Numbers refer to the segments of the trunk. Magnification,…
Image
from article Polychaeta
Gastrolepidia clavigera; scanning electron microscope view of the anterior end. Mo: mouth; Ja: jaw; Pa: palps; Prb: proboscis. Magnification, 30×.
Image
from article Polychaeta
Gastrolepidia clavigera, scanning electron microscope view of the two first parapodia (Pa1, Pa2). Ch: chaetae; Ci: cirrus; Nop: notopodium; Nep: neuropodium. Magnification, 40×.
Image
from article Polychaeta
Section through a polychaete. (After E. E. Ruppert and R. D. Barnes, Invertebrate Zoology, Saunders College Publishing, Orlando, 1994)
Image
from article Chaetonotida
Marine gastrotrichs of the order Chaetonotida; dorsal views. (a) Xenotrichula (courtesy of W. D. Hummon). (b) Chaetonotus (after W. D. Hummon, Intertidal marine Gastrotricha from Colombia, Bull. Mar. Sci., 24:396–408, 1974).
Image
from article Nitrogen oxides
Nitrogen-oxide structures. Blue = nitrogen. Red = oxygen.
Image
from article Lychee
Fruit and leaves of lychee (Litchi chinensis). (Photo courtesy of Forest and Kim Starr)
Image
from article Skink
Five-lined skink (Plestiodon fasciatus; formerly Eumeces fasciatus). (Credit: George W. Robinson; copyright © California Academy of Sciences)
Image
from article Ephemeroptera
Ephemeroptera. (a) Mayfly, adult male, Hexagenia sp., in usual resting position (after A. H. Morgan, Field Book of Ponds and Streams, G. Putnam's Sons, 1930). (b) Mayfly, subadult male, Callibaetis sp., newly emerged from water, standing on surface…
Image
from article Prairie dog
Black-tailed prairie dogs (Cynomys ludovicianus). (Photo by Ron Singer, U.S. Fish and Wildlife Service)
Image
from article Percopsiformes
Trout-perch (Percopsis omiscomaycus). (Photo by Konrad P. Schmidt)
Image
from article Percopsiformes
Pirate perch (Aphredoderus sayanus). (Photo by Konrad P. Schmidt)
Image
from article Percopsiformes
Ozark cavefish (Amblyopsis rosae). (Photo courtesy of U.S. Fish and Wildlife Service)
Image
from article Prosobranchia
Common gastropods. (Top left) Murex troscheli. (Middle) Conus gloriamaris. (Top right) Lambis crocata. (Bottom) Angaria vicdani.
Image
from article Sauropterygia
Ceresiosaurus calcagnii, ventral view.
Image
from article Hyperbola
Hyperbola as a conic section.
Image
from article Hyperbola
Hyperbola as a locus of points.
Image
from article Alicyclic hydrocarbon
Internal bond angles (α) for (a–c) planar rings and (d) a tetrahedral carbon atom.
Image
from article Alicyclic hydrocarbon
Nonplanar (a) chair and (b) boat structures of cyclohexane.
Image
from article Alcohol
Ethanol production plant. (Credit: Julie Kendall/Getty Images)
Image
from article Alcohol
E85 is a gasoline-ethanol blend containing 51 to 83% ethanol. It is used in flexible-fuel vehicles, which can operate on gasoline or blends of gasoline and ethanol. About 20 million flexible-fuel vehicles are operating in the United States. (Credit:…
Image
from article Fluids
Probability of finding molecular centers at various separations in gases, liquids, and solids.
Image
from article Fluids
Conditions of pure-component phase behavior.
Image
from article Fluids
Behavior of pure-component pressures with density at various temperatures.
Image
from article Fluids
Behavior of pure-component compressibility factors with pressure at various temperatures.
Image
from article Zebu
Gray Brahman bull (Bos indicus). (Photo courtesy of Salinas Ranch, Carmine, Texas)
Image
from article Physical science
An astronaut conducts a physical science experiment aboard the International Space Station involving buoyancy-driven convection and sedimentation, which as force-dependent phenomena occur differently in a microgravity environment. (Credit: NASA)
Image
from article Model theory
Conceptual model of a system.
Image
from article Model theory
Model of a regional population system.
Image
from article Biosynthesis
Biosynthetic relationships of some natural products. Specific examples which belong to the various classes are given in brackets.
Image
from article Thulium
Image
from article Diadematoida
Two ambulacral plates of Diadema. (After T. Mortensen, A Monograph of the Echinoidea, III, C. A. Reitzel, Copenhagen, 1943)
Image
from article Diadematoida
Diadema antillarum on coral reef. Spines are commonly black, but white spines, as shown here, are also frequently found. (Photo courtesy of J. E. Miller)
Image
from article Valvatida
Valvatid pedicellariae (valvate type) on marginal plates of Hippasteria trojana.
Image
from article Valvatida
Three-dimensional diagram showing the main ossicles of the valvatid arm.
Image
from article Remipedia
Representative Remipedia. (a) Speleonectes lucayensis (after F. R. Schram, Crustacea, Oxford University Press, New York, 1986). (b) Lasionectes entrichoma [after J. Yager and F. R. Schram, Lasionectes entrichoma, new genus, new species (Crustacea:…
Image
from article Chemistry
Periodic table. (Jaap Hart/Getty Images)
Image
from article Cumacea
A typical adult male cumacean.
Image
from article Mercury (element)
Image
from article Mercury (element)
Mercury droplets exhibiting non-wetting of the surface. (Credit: A. Cerar/Getty Images)
Image
from article Mercury (element)
Tooth with a silver-amalgam filling. (Credit: Szasz-Fabian Jozsef/Shutterstock.com)
Image
from article Bluegrass
Kentucky bluegrass (Poa pratensis). (Photo courtesy of Forest and Kim Starr)
Image
from article Coronoidea
Stephanocrinus gemmiformis, Middle Silurian, Tennessee; side view of the theca.
Image
from article Organic conductor
Structures of organic conductors. (a) Electron donors. (b) Acceptor molecule (TCNQ) and two monovalent anions. Abbreviations are explained in the text.
Image
from article Organic conductor
Stacking of charge-transfer compounds. (a) Segregated stacking of TTF-TCNQ-like materials. (b) Typical zigzag stacking of the (TMTSF)2X series.
Image
from article Organic conductor
Comparison of the range of electrical conductivities of some AsF5-doped conducting polymers with some metals, semiconductors, and nonconducting polymers.
Image
from article Organic conductor
Image
from article Macrostomorpha
Macrostomum lignano, a new species from the northern Adriatic near Lignano, Italy. (a) Photomicrograph of a living, slightly squeezed worm. (b) Diagram showing the major organ systems. (From L. Schärer, G. Joss, and P. Sandner, Mating behavior of…
Image
from article Myzostomida
Scanning electron microscopy view of the ventral side of the Indo-Pacific Myzostoma ambiguum showing the parapodia and the marginal cirri. The individual is 4 mm (0.16 in.) long.
Image
from article Myzostomida
Scanning electron microscopy view of the ventral side of the Atlantic Myzostoma cirriferum metatrochophore. The larva is 0.05 mm (0.002 in.) long.
Image
from article Sandalwood
Coast sandalwood (Santalum ellipticum) of Hawaii. (Photo courtesy of Forest and Kim Starr)
Image
from article Geometrization theorem
Making a 2-D torus.
Image
from article Geometrization theorem
Life in Seifert-Weber dodecahedral space. (Courtesy of Geometry Center, University of Minnesota)
Image
from article Geometrization theorem
Hyperbolic dodecahedron of infinite diameter. The infinite spikes are rounded off “chimneys,” which are here triangular rather than rectangular. (Courtesy of Paul Nylander fromhttp://bugman123.com/)
Image
from article Geometrization theorem
Neck pinching, resulting in infinite curvature.
Image
from article Geometrization theorem
Ricci flow with surgery.
Image
from article Killer whale
Killer whales (Orcinus orca) in the waters off Alaska. (Credit: David Ellifrit/Alaska Fisheries Science Center, National Oceanic and Atmospheric Administration)
Image
from article Killer whale
The tail of a killer whale. (Credit: Janice Waite/Alaska Fisheries Science Center, National Oceanic and Atmospheric Administration)
Image
from article Matrix theory
Vector rotation that rotates any vector v in the plane counterclockwise through 45° to a new vector Tv.
Image
from article Grylloblattodea
Dorsal view of the first ice crawler species to be described: Grylloblatta campodeiformis. (Redrawn from the original paper by E. M. Walker, A new species of Orthoptera, forming a new genus and family, Can. Entomol., 46(3):93–99, 1914)
Image
from article Calculus of variations
Weierstrass condition. Symbols explained in text.
Image
from article Calculus of variations
Example of an area-minimizing surface that cannot be written as the graph of a single function. (a) Nonconvex domain C. (b) Minimal graph over C that is not area-minimizing. (c) Second surface over C that has less area. (After F. Morgan, Geometric…
Image
from article Calculus of variations
Comparison of surfaces. (a) Surface with no handles. (b) Surface with one handle and less area. (c) Surface with two handles and still less area. (d, e, f) These three surfaces are deformed to show that they do have zero, one, and two handles,…
Image
from article Calculus of variations
Examples of surfaces minimizing the integral of a nonelliptic integrand among all bodies having the same volume (the surface at upper left) and among all surfaces having the same boundary (the saddle-shaped surface). Surfaces were computed as part…
Image
from article Mink
American mink (Neovison vison; alternatively, Mustela vison). (Photo courtesy of Isle Royale National Park, Michigan; U.S. National Park Service)
Image
from article Bluestem grass
Big bluestem (Andropogon gerardii). (Photo by Lynn Betts, Natural Resources Conservation Service, U.S. Department of Agriculture)
Image
from article Bluestem grass
Seed heads of little bluestem (Schizachyrium scoparium). (Photo by Lynn Betts, Natural Resources Conservation Service, U.S. Department of Agriculture)
Image
from article Linear algebra
Geometric representation of a vector OP.
Image
from article Hydrido complexes
Structure of ReH92−.
Image
from article Hydrido complexes
Structure of [HMn(CO)5].
Image
from article Hydrido complexes
Structure of [HRe(C5H5)2]. The aromatic C5H5 groups are represented by pentagons.
Image
from article Hydrido complexes
Hydridophosphine structures, with the C6H5 groups not shown. (a) [HRuCl(P{C6H5 }3)3]. (b) [H3Ir(P{C6H5 }3)3].
Image
from article Hydrido complexes
Reaction scheme for hydrogenation of an olefin using Wilkinson's catalyst.
Image
from article Hydrido complexes
Structure of [HCr2(CO)10]−.
