Image
from article Blowpipe
Glassblower blowing into a blowpipe to shape molten glass. (Credit: Hero Images/Getty Images)
Search Results
Search Results
Refine this search
Search result paging links
3,785 results
Image
from article Tin
Image
from article Tin
Image
from article Isoelectric point
Titration of alanine with sodium hydroxide (NaOH), showing the course of pH with added fractional equivalents. The four arrows show, from left to right, the pKa [½ cations: NH3+(CH3)COOH, and ½ zwitterions: NH3+(CH3)CHCOO−], the pl (all…
Image
from article Isoelectric point
Course of the charges carried by lysine (pKa = 2.18) molecules in dilute aqueous solution with pH during a titration with alkali. Shown are the net charge, going from +2 at low pH to +1 between pH 4.5 and 6.5, the isoelectric point at pH 9.74, the…
Image
from article Sloan Digital Sky Survey
Sloan Digital Sky Survey (SDSS) 2.5-m (98-in.) telescope at Apache Point Observatory, New Mexico. The secondary mirror is visible in the center of the aperture. The square structure surrounding the primary and secondary mirrors shelters them from…
Image
from article Sloan Digital Sky Survey
Spectrum of a galaxy (image inset) receding at around 6000 km s−1 (3700 mi s−1), or about 2% of the speed of light. The vertical line shows the wavelength at which one expects to observe the emission line Hα for an object at rest (656.3 nm). The…
Image
from article Sloan Digital Sky Survey
Distribution of galaxies within 4° of the celestial equator from the SDSS. In this polar plot, the radius indicates the distance from the Milky Way, and the angle is the right ascension. The diameter shown is 8 × 109 light-years. Blank areas have…
Image
from article Sloan Digital Sky Survey
Map of stars in the SDSS. Grayscale signifies density of stars on the sky. Several streams of stars are noticeable. Areas in background are those unobserved by the survey. (Courtesy of Vasily Belokurov; Sloan Digital Sky Survey)
Image
from article Sloan Digital Sky Survey
Image of Canes Venatici I, a recently discovered satellite of the Milky Way Galaxy. (Photo courtesy of Vasily Belokurov; Sloan Digital Sky Survey)
Image
from article Sloan Digital Sky Survey
Hubble sequence of galaxies, as observed by the SDSS. Elliptical galaxies (types marked E0 and E6) are old, spheroidal, and very massive. Spiral galaxies are on average less massive. While some spiral galaxies (S0 and Sa) tend to have very little…
Image
from article Iridium
Image
from article Binary and multiple asteroids
Asteroid 121 Hermione and its moonlet companion observed with the adaptive optics system mounted on the European Southern Observatory's Very Large Telescope [consisting of four 8.2-m (25-ft) telescopes] at six different times. The satellite revolves…
Image
from article Human-factors engineering
Human-factors engineers design modern computer equipment, including ergonomic keyboards and mouse devices, to accommodate the varied physical contours and dimensions of the human hand. (Credit: JG Photography/Alamy)
Image
from article Human-factors engineering
Human-factors engineering addresses problems related to the design of seats, workplaces, and consoles in terms of a user's physical size, comfort, strength, and visibility. (Copyright © McGraw-Hill Education)
Image
from article Human-factors engineering
Cognitive engineering and the development of new technology applications.
Image
from article Human ecology
Shacks and garbage along a dirty river in a slum in Manila, Philippines. Human ecology encompasses how individual people and their communities interact with their particular environment. In many cases, though, humans have created polluted…
Image
from article Human ecology
Burning of a tropical rainforest in Brazil in order to clear land for animal grazing. (Credit: Barry Barker; copyright © McGraw Hill)
Image
from article Saturn
Saturn viewed on April 25, 2016 by the Cassini orbiter as the planet neared its northern hemisphere's summer solstice. (Credit: NASA/JPL-Caltech/Space Science Institute)
Image
from article Saturn
Saturn viewed from the Cassini orbiter. The soft velvety appearance of the low-contrast banded structure is due to scattering by the haze layer above the planet's cloud deck. The image has been rotated so that north is up. The Sun illuminates Saturn…
Image
from article Saturn
Presentations of Saturn's ring system over the course of a Saturnian year.
Image
from article Saturn
Images from the Cassini spacecraft show the life cycle of Saturn's great northern storm beginning on December 5, 2010, when a small white cloud appeared at latitude 33°N. In these views, the Cassini spacecraft was in the ring plane, and the ring…
Image
from article Saturn
A natural color view of Saturn's rings from the Cassini Orbiter taken on August 22, 2009, at a distance of 2.05 million km (1.27 million mi) from Saturn. (Credit: NASA/JPL/Space Science Institute)
Image
from article Saturn
Structure of Saturn's rings observed by two different approaches. The upper half of the image is a natural-color mosaic of images by the Cassini narrow-angle camera. Such images have information about how ring structure differs both with distance…
Image
from article Saturn
Saturn's F ring viewed from the Cassini orbiter. Features resembling drapes and kinks are visible, and several distinct ringlets are present, in addition to the bright knotted core of the ring. The structure in the ring and its strands has been…
Image
from article Saturn
Titan superimposed in front of Saturn, captured by the Cassini spacecraft. (Credit: NASA/JPL-Caltech/Space Science Institute)
Image
from article Saturn
The satellite Phoebe taken during Cassini's flyby on June 11, 2004. The image shows evidence for the theory that Phoebe is an ice-rich body coated with a thin layer of dark material. (Credit: NASA/JPL/Space Science Institute)
Image
from article Absorption
Incident sunlight is absorbed, reflected, and scattered by tree leaves. (Credit: Shutterstock / photolinc)
Image
from article Capricornus
Modern boundaries of the constellation Capricornus, the Sea Goat. The celestial equator is 0° of declination, which corresponds to celestial latitude. Right ascension corresponds to celestial longitude, with each hour of right ascension representing…
Image
from article Bioorganic chemistry
Vancomycin and an analog that is active against vancomycin-resistant bacteria.
Image
from article Bioorganic chemistry
Foldamers that mimic proteins.
Image
from article Bioorganic chemistry
The rate of this intramolecular lactonization, relative to that of intermolecular esterification, mimics the rate increase caused by an enzyme's binding and orienting substrates for a bimolecular reaction.
Image
from article Bioorganic chemistry
Intramolecular models of enzymatic general acid and general base catalysis. (a) Intramolecular general acid catalysis causes this acetal to hydrolyze at pH 7 more than 107 times faster than the corresponding acetal without the carboxylic acid group.…
Image
from article Bioorganic chemistry
An antibody raised against the phosphonate analog of a tetrahedral intermediate catalyzes the hydrolysis of cocaine to ecgonine methyl ester.
Image
from article Bioorganic chemistry
A functionalized cyclodextrin mimics the enzyme RNase by catalyzing the regioselective hydrolysis of a model phosphodiester.
Image
from article Bioorganic chemistry
Enzyme-catalyzed reactions that have been commercialized as industrial processes.
Image
from article Bioorganic chemistry
Mechanism of DNA scission by calicheamicin. Reductive or nucleophilic cleavage of the trisulfide triggers conjugate (Michael) addition to the enone, rehybridization of the bridgehead carbon, and Bergman cyclization of the enediyne, generating a…
Image
from article Liquid chromatography
Chromatogram showing the separation of various ethoxylates (nonionic surfactants) from an environmental water sample by liquid chromatography. EO = ethoxylate. Cx = alkyl. OP = octylphenol. NP = nonylphenol. (Credit: U.S. EPA)
Image
from article Gelatin
Gelatin capsules. (Copyright © Digital Vision/SuperStock)
Image
from article Gelatin
Gelatin fruit dessert. (Credit: Getty Images/iStockphoto)
Image
from article Solid-state battery
A researcher holds a sample of a prototype structure for a solid-state battery intended for use on small satellites. (Credit: NASA/Dimitri Gerondidakis)
Image
from article Solid-state battery
Schematic illustration of an intercalation cathode reaction.
Image
from article Solid-state battery
Schematic diagram of solid-state battery.
Image
from article Cataclysmic variable
Visualizations of the components of cataclysmic variables. The components are not drawn strictly to scale, for ease of viewing. (a) Accretion disk system, the most common type. The shape of the cool star is distorted due to the gravitational…
Image
from article Acid and base
Ball-and-stick model of phosphoric acid (H3PO4). H = white. P = orange. O = red.
Image
from article Acid and base
Image
from article Pleiades
The Pleiades. (Lick Observatory photograph)
Image
from article Decomposition potential
Determination of decomposition potential.
Image
from article Vanadium
Image
from article Germanium
