Search Results

10 | 25 | 50 | 100 items per page

1,336 results

Project

3D Skull Candy Mold

Whether preparing for Halloween or just a regular day, you can make skull-shaped edibles from this project's 3D candy mold. Like many molds, this one is a hollow container into which you can pour water or hot liquids, such as gelatin, chocolate, or…

Image

from article Sonobuoy

Launch of a sonobuoy from an antisubmarine warfare (ASW) aircraft. (a) In flight. (b) Buoy strikes the water in a nearly vertical attitude. (c) Antenna and hydrophone are positioned automatically.

Image

from article Yeast

Colorized scanning electron micrograph (SEM) of Schizosaccharomyces pombe yeast. This single-celled fungus is studied widely as a model organism for eukaryotic cell division. It is a rod-shaped yeast that grows by elongation at its ends, and it…

Image

from article Yeast

Cell shapes of yeasts are extremely varied: (a) rectangular; (b) pear-shaped; (c) apiculate; (d) ogival; (e) spherical; (f) globose; (g) ellipsoidal (oval); (h) elongate; (i) tetrahedral. (Copyright © McGraw Hill)

Image

from article Yeast

Colorized scanning electron micrograph (SEM) of cells of brewer's yeast (Saccharomyces cerevisiae). This yeast consists of single vegetative cells. Small daughter cells can be seen budding off from the larger cells. Saccharomyces cerevisiae ferments…

Image

from article Yeast

Image

from article Yeast

Image

from article Yeast

A fluorescent antibody stain reveals the oval budding yeast cells of Candida albicans. This yeast is the most common human fungal pathogen. (Credit: Maxine Jalbert and Leo Kaufman/Centers for Disease Control and Prevention)

Image

from article Beer

Grains of (a) barley before malting and (b) hop plant. (Credit: U.S. Department of Agriculture)

Image

from article Beer

Fermentation tanks. (Credit: ClarkandCompany/Getty Images)

Image

from article Peppermint

Peppermint (Mentha piperita). (Credit: Michael Thompson/Agricultural Research Service, U.S. Department of Agriculture)

Image

from article Citron

Citron (Citrus medica), including cross sections of the fruit. (Photo courtesy of California Citrus Clonal Protection Program)

Image

from article Foodborne disease

Trichrome-stained photomicrograph of a Giardia lamblia trophozoite (a growing stage in the life cycle of certain protozoan parasites). This microorganism often causes giardiasis (a diarrheal foodborne illness). (Credit: Melanie Moser/Centers for…

Image

from article Foodborne disease

A cluster of norovirus particles. (Credit: Charles D. Humphrey/Centers for Disease Control and Prevention)

Image

from article Foodborne disease

Colored scanning electron micrograph showing Salmonella enterica bacteria (serotype Typhimurium; colorized red) invading an immune cell (colorized yellow). This bacterial species commonly causes food-associated gastroenteritis. (Credit: National…

Image

from article Foodborne disease

Close-up view of Campylobacter jejuni bacteria. This scanning electron microscope image shows the characteristic spiral (or corkscrew) shape of C. jejuni cells. (Credit: De Wood and Chris Pooley/Agricultural Research Service, U.S. Department of…

Image

from article Astrapotheria

Skeleton of Astrapotherium magnum. The genus Astrapotherium is known from the late Oligocene to the late Miocene.

Image

from article Lycopsida

Lycopodium clavatum, a representative homosporous lycopsid. (a) Sporophyte showing typical rhizomatous growth and paired cones. (b) Microphyllous leaf. (c) Sporophyll bearing a sporangium on the upper surface. (From K. R. Sporne, The Morphology of…

Image

from article Marsupialia

Skull and jaws of marsupials. (a) Didelphidae, Didelphis (the carnivorous opossum of North America), Recent, with polyprotodont incisors (I 5/4). (b) Phalangeridae, Trichosurus (the herbivorous opossum of Australia), Recent, with diprotodont…

Image

from article Marsupialia

Views of the soles of the left hindfoot of marsupials. (a) Didelphidae, Didelphis, representing the five-toed, polydactylous condition. (b) Phalangeridae, Trichosurus, representing the five-toed, syndactylous condition (digits II and III are bound…

Image

from article Pholidota

Pangolin (genus Manis, order Pholidota). (Credit: Wildlife Alliance)

Image

from article Taste

Taste buds in a circumvallate papilla in a mouse tongue with taste cells visualized in color by cell-type-specific fluorescent antibodies. (Credit: Aki Taruno/Perelman School of Medicine, University of Pennsylvania)

Image

from article Taste

Illustration of the internal structures of a taste bud, which is composed of basal stem cells and three types of taste cells (dark, light, and intermediate). Taste cells extend from the base of the taste bud to the taste pore, where microvilli…

Image

from article Taste

Lemons and lemonade taste sour because they are very acidic and have a high concentration of hydrogen (H+) ions. (Credit: Mad Circles/Getty Images)

Image

from article Taste

Image

from article Hexactinellida

The dried siliceous skeleton of a glass sponge, Euplectella. (Credit: Randolph Femmer/United States Geological Survey)

Image

from article Hexactinellida

The class Hexactinellida includes living and fossil forms. Living hexactinellids: (a) Hyalonema (Cyliconema) thomsoni (order Amphidiscosida) and (b) Regadrella phoenix (order Lyssacinosida). Fossil hexactinellid: (c) Hydnoceras tuberosum (order…

Image

from article Hexactinellida

A fossil hexactinellid sponge, Hydnoceras bathense (order Reticulosa). (Credit: James St. John)

Image

from article Lagomorpha

Image

from article Milk

Dairy cow milking operation. (Credit: Yadamons/Getty Images)

Image

from article Milk

Milk and milk products yogurt and mozzarella. (Credit: Lilyana Vynogradova/iStockphoto/Getty Images)

Image

from article Spearmint

Native spearmint (Mentha spicata). (Credit: Gerald D. Carr)

Image

from article Botulism

A colony of Clostridium botulinum, the causative agent of botulism, growing on egg yolk agar. (Credit: Larry Stauffer/Centers for Disease Control and Prevention)

Image

from article Halimeda

Halimeda kanaloana found in the waters off Hawaii. (Photo courtesy of the Deep Water Macroalgal Meadows 2004 Exploration, Office of Ocean Exploration, National Oceanic and Atmospheric Administration)

Image

from article Stenurida

Stenurida. (a) Ventral view of an arm and mouth frame plates of Bdellacoma vermiformis, a stenurid with long, slender arms. (b) Stenaster obtusus, a stenurid with short, broad arms. (After W. K. Spencer and C. W. Wright, Asterozoans, in R. C. Moore,…

Image

from article Sarcopterygii

Marbled or speckle-bellied lungfish (Protopterus aethiopicus). This African lungfish, a member of the class Sarcopterygii, can reach up to 2 m (6.6 ft) in length. (Photo by Joel Abroad)

Image

from article Tarragon

Tarragon (Artemisia dracunculus). (Photo by Leo Michels)

Image

from article Xiphosurida

Segmentation of Limulus polyphemus. Inconclusive evidence indicates that there are 15 segments (6 in the prosoma, 9 in the opisthosoma). The telson (XV) may be a terminal spine that has become articulated and has incorporated the anus into its base.…

Image

from article Xiphosurida

Image

from article Xiphosurida

Image

from article Xiphosurida

Image

from article Xiphosurida

Embryonic and larval development of Limulus polyphemus. (a) Early embryo, side view. (b) Late embryo. (c) Yolk-filled digestive tract of larva. Note the segmentation of yolk in the newly hatched stage and the six lobes of digestive gland. (d) First…

Image

from article Xiphosurida

Morphology of adult male Limulus polyphemus. (a) Dorsal view. (b) Ventral view, appendages not shown. (c) Cross section through prosoma showing internal anatomy. (d) Posterior view. (e) Lateral view. (Copyright © McGraw Hill)

Image

from article Temnospondyli

Common Permian temnospondyl Eryops; length is approximately 6 ft (2 m). (After American Museum of Natural History)

Image

from article Mammoth

Skeleton of a mammoth (genus Mammuthus). (Credit: Beatrissa/Shutterstock)

Image

from article Mammoth

Photograph of the grinding surfaces of a molar tooth of an adult Mammuthus columbi (main image) and a tooth from a baby mammoth (lower-left image). Cross ridges of enamel show various stages of wear, with dentine in the middle of each pair of…

Image

from article Mammoth

View of a sculpture of a mammoth at the La Brea Tar Pits and Museum in Los Angeles, California. (Credit: Zack Frank/Shutterstock)

Image

from article Mammoth

Pictographs of a mammoth and a bison at a site along the San Juan River in Utah: (top) photo without enhancement; (bottom) labeled photo with colorized mammoth and bison. (Credit: Ekkehart Malotki)

Image

from article Piltdown man

Three views of the reconstructed skull of Piltdown. The original preserved portions are shown as dark areas. The light portions are reconstructed only.

Image

from article Organic agriculture

Small-scale organic vegetable farm in the Netherlands.

Image

from article Organic agriculture

Examples of labels representing two certification programs, the EU Organic regulation and the USDA National Organic Program.

Image

from article Orthida

Orthida: (a) dorsal, (b) ventral, (c) posterior, and (d) anterior views of Platystrophia, Ordovician; (e) diversity history of orthid families. (a–d after R. C. Moore, C. G. Lalicker, and A. G. Fischer, Invertebrate Fossils, McGraw-Hill, New York,…

Image

from article Conifer

A mixed conifer forest primarily composed of western white pine and mountain hemlock surrounding Cliff Lake, Lassen Volcanic National Park, California. (Credit: Amanda Sweeney/National Park Service)

Image

from article Conifer

Image

from article Conifer

Conifer seed cone structure. (a) Pine cone consisting of seed scales attached to the cone axis immediately above the bracts. One scale is bent back to reveal two seeds attached to the upper surface. (b) Fertile shoot from above a bract in an Emporia…

Image

from article Cyclostomatida

Cyclostome zooids (order Cyclostomatida) with tentacles retracted versus extended. (Reprinted with permission from R. J. Cuffey and J. E. Utgaard, Bryozoans, pp. 201–216, in R. Singer, ed., Encyclopedia of Paleontology, Vol. 1, 2d ed., Fitzroy…

Image

from article Xenungulata

Molars of Carodnia vieirai from the Paleocene of Brazil: (a) upper and (b) lower.

Image

from article Dairy machinery

Milking machines extract milk from cows' udders and deliver the milk to an adjacent container or, for a pipeline milking system, directly to a central cooling tank.

Image

from article Dairy machinery

Arrangement of the component parts of a milking machine.

Image

from article Dairy machinery

Processing plant operations.

Image

from article Dairy machinery

Pasteurization processes. Details of bypass, relief lines, equalizer, and check valves are not included.

Image

from article Dairy machinery

Types of milk dryers and method of operation. (a) Drum dryers. (b) Vertical chamber spray dryers.

Image

from article Porifera

The giant barrel sponge (Xestospongia muta) is often found growing on Caribbean coral reefs. This type of marine sponge, which belongs to the class Demospongiae, has been known to grow to more than 1.8 m (6 ft) in diameter. (Credit: National Oceanic…

Image

from article Porifera

The azure vase (chalice) sponge (Callyspongia plicifera) is a type of demosponge, producing monaxonic or tetraxonic silica spicules and/or spongin. (Credit: Diane R. Nelson)

Image

from article Porifera

Image

from article Porifera

Image

from article Porifera

Image

from article Porifera

Image

from article Porifera

Image

from article Porifera

Image

from article Porifera

Image

from article Porifera

A fossilized early sponge. (Credit: Yinan Chen)

Image

from article Spongiomorphida

Spongiomorpha acyclica (Triassic, Austria), length = 8 cm. (From J. P. Smith, Upper Triassic marine invertebrate faunas of North America: Spongiomorphs, U.S. Geol. Surv. Prof. Pap., 1927)

Image

from article Octopoda

An octopod swimming in the ocean. (Credit: Getty Images/iStockphoto)

Image

from article Octopoda

Hapalochlaena maculosa, the Southern or lesser blue-ringed octopus, has vivid, small blue rings on its body and arms, highlighted with black outlines. Location: Mrs. Watson's Bay, Lizard Island, Great Barrier Reef, Australia. (Credit: Clyde F. E.…

Image

from article Octopoda

Hapalochlaena fasciata, the blue-lined octopus, has vivid blue lines on its body and rings on its arms, highlighted with black outlines. Location: Long Reef, New South Wales, Australia. (Credit: Clyde F. E. Roper)

Image

from article Octopoda

Image

from article Polyplacophora

Chiton on a rock surface. (Photo courtesy of the NOAA Okeanos Explorer Program, National Oceanic and Atmospheric Administration)

Image

from article Polyplacophora

Polyplacophoran mollusk (chiton): (a) dorsal view; (b) ventral view.

Image

from article Trace fossils

Domichnial dwelling burrow with pelleted wall, probably created by a burrowing crustacean. Ophiomorpha, Cretaceous, North Dakota. (From W. Häntzschel, in C. Teichert, ed., Treatise on Invertebrate Paleontology, pt. W, revised, University of Kansas…

Image

from article Trace fossils

Highly branched, fodinichnial mining burrow, possibly produced by a deposit-feeding crustacean or worm. (a) Chondrites, Tertiary, Austria. (b) Chondrites, Tertiary, Spain. (From W. Häntzschel, in C. Teichert, ed., Treatise on Invertebrate…

Image

from article Trace fossils

Agrichnial farming trace of an unknown organism, composed of a hexagonal, meshlike network of tunnels. Paleodictyon, Tertiary, Poland. (Photograph by W. Häntzschel)

Image

from article Trace fossils

Agrichnial farming traces of unknown organisms, including a double-spiral tunnel (Spirorhaphe) and a meshlike network of tunnels (Paleodictyon). Tertiary, Austria. (Photograph by W. Häntzschel)

Image

from article Trace fossils

Loosely meandering, agrichnial farming trace of an unknown organism. Cosmorhaphe, Tertiary, Poland. (From W. Häntzschel, in C. Teichert, ed., Treatise on Invertebrate Paleontology, pt. W, revised, University of Kansas Press, 1975)

Image

from article Trace fossils

Praedichnial boring drilled in a bivalve shell by a carnivorous gastropod. Oichnus, Recent, Texas. (Photograph by A. A. Ekdale)

Image

from article Trace fossils

Tightly meandering, pascichnial grazing trail, created by an unknown worm. Helminthoida, Tertiary, Austria. (From W. Häntzschel, in C. Teichert, ed., Treatise on Invertebrate Paleontology, pt. W, revised, University of Kansas Press, 1975)

Image

from article Trace fossils

Repichnial trail of an arthropod, possibly a trilobite. Cruziana, Cambrian, Alberta. (Photograph by J. P. A. Magwood)

Image

from article Trace fossils

Unnamed escape structure (fugichnial trace) in sandstone. Cretaceous, Utah. (Photograph by A. A. Ekdale)

Image

from article Trace fossils

Cubichnial resting trace of an ophiuroid brittle star. Asteriacites, Jurassic, Germany. (Photograph by W. Häntzschel)

Image

from article Trace fossils

Complex, composite ichnofabric created by numerous successive phases of burrowing in a fine-grained pelagic carbonate deposit, which has been weakly cemented to become chalk. Upper Cretaceous, Denmark. (Photograph by A. A. Ekdale and R. G. Bromley)

Image

from article Guided missile

GBU-15 with data link system, mounted on F-4 Phantom II fighter. (Hughes Aircraft Co.)

Image

from article Guided missile

TOW (tube-launched, optically tracked, wire-guided) antitank missile and launch tube. Wings and tails fold to permit tube mounting. (Hughes Aircraft Co.)

Image

from article Guided missile

Launching of a field-mobile, short-range, all-weather surface-to-air Roland missile. The West German–French Roland has been licensed for production in the United States for use as a U.S. Army air defense weapon. (U.S. Army)

Image

from article Guided missile

F-15 Eagle fighter aircraft equipped with a mixture of short-range, infrared Sidewinder and medium-range, radar Sparrow air-to-air missiles. (McDonnell-Douglas)

Image

from article Guided missile

Phoenix long-range air-to-air supersonic missile. (a) Side view (Hughes Aircraft Co.). (b) Launch from F-14 fighter aircraft (U.S. Navy).

Image

from article Guided missile

Falcon air-to-air missile family, including missiles with infrared and radar guidance, and high-explosive and nuclear warheads. (Hughes Aircraft Co.)

Image

from article Guided missile

Tomahawk long-range, subsonic cruise missile. (a) Side view. (b) Submerged launch. Missile may also be launched from surface or air. (General Dynamics)

Image

from article Guided missile