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from article Capricornus

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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…

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from article Type 1 diabetes

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One characteristic feature of type 1 diabetes is glomerulosclerosis (Kimmelstiel-Wilson lesion), which involves the scarring or hardening of the glomeruli (blood vessels) in the kidneys. (Copyright © McGraw-Hill Education)

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from article Type 1 diabetes

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Stages in the development of type 1 diabetes. (Credit: Type 1 Diabetes TrialNet)

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from article Yeast

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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…

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from article Yeast

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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.

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from article Yeast

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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…

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from article Yeast

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Yeast mycelia. (a) A true septate mycelium showing a break to form an arthrospore. (b) A pseudomycelium.

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from article Yeast

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Heterothallic (bifactorial) life cycle of a basidiomycetous yeast, Leucosporidium scottii.

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from article Yeast

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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)

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from article Foodborne disease

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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…

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from article Foodborne disease

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

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from article Foodborne disease

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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…

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from article Foodborne disease

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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…

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from article Trans fatty acid

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Generalized chemical structure of the double bond in natural and common industrial monounsaturated fatty acids (18:1): configuration of the unsaturation site in monounsaturated fatty acids as found as a cis structure in natural fats/oils or as a…

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from article Cataclysmic variable

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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…

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from article CRISPR/Cas9 gene editing

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Acquisition of immunity in the CRISPR/Cas9 system. Bacterial cells that are not immune to a particular bacteriophage and that survive infection acquire immunity through the function of the cas1 and cas2 genes. Through unknown mechanisms, Cas1 and…

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from article CRISPR/Cas9 gene editing

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The function of the CRISPR/Cas9 system in bacterial immunity. Bacterial cells that are immune to particular bacteriophage species contain protospacer sequences that match or closely match the bacteriophage genome. (1) The bacterial genome contains…

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from article CRISPR/Cas9 gene editing

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The function of the CRISPR/Cas9 system in genome engineering. Multiple methods are used to engineer genomes using the CRISPR/Cas9 system. One common method is illustrated here. (1) An engineered cas9 gene and an engineered crRNA–tracrRNA fusion…

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from article Hepatitis

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False-color transmission electron microscopy image of the hepatitis A virus (HAV). (Credit: BSIP/Getty Images)

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from article Hepatitis

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Clinical features of hepatitis. (Copyright © McGraw-Hill Education)

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from article Hepatitis

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Inflammation in chronic hepatitis C virus (HCV) infection. When the body is engaged in fighting chronic inflammation of the liver's portal tract (center of the photomicrograph), lymphocytes (white blood cells) are present. (Copyright © McGraw-Hill…

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from article Pleiades

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The Pleiades. (Lick Observatory photograph)

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from article Yersinia

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Scanning electron micrograph (color-enhanced) of Yersinia pestis bacteria (yellow) on the proventricular spines of a Xenopsylla cheopis flea (purple). (Photo courtesy of the National Institute of Allergy and Infectious Diseases, Bethesda, MD)

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from article Taste

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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)

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from article Taste

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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…

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from article Taste

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

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from article Taste

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Taste quality changes when spatial arrangements within a molecule are altered. (Copyright © McGraw-Hill Education)

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from article SS 433

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Doppler shifts of the “moving” Hα lines of (a) the approaching jet and (b) the receding jet of SS 433 versus the precession phase. The Doppler shift gives the ratio v/c, where v is the approach or recession velocity and c is the speed of light. The…

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from article SS 433

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Radio image of SS 433 obtained in 2003 with the Very Large Array. A contour plot of the intensity of radio emission is superimposed on a pixel image. The binary core is the brightest spot in the center, from which matter is outflowing in two…

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from article SS 433

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X-ray observations of SS 433 performed in 2000 with the Chandra X-ray Observatory. (a) X-ray image. The binary core of SS 433 is indicated with a cross and is not bright due to an instrumental effect. The lobes of the x-ray jets are visible on…

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from article Environmental toxicology

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June 2010 Deepwater Horizon Oil Spill in the Gulf of Mexico. Containment and controlled burn. (Credit: U.S. Navy photo by Mass Communication Specialist 2nd Class Justin Stumberg)

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from article Hypothermia

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Body heat lost with exposure to 0°C air and 10°C water. °C = (°F − 32)1.8.

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from article Radio telescope

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The 110 by 100 m (361 by 328 ft) fully steerable radio telescope in Green Bank, West Virginia. (Photo courtesy of National Radio Astronomy Observatory/Associated Universities, Inc./National Science Foundation)

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from article Radio telescope

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The 1000-ft (305-m) fixed spherical dish of the National Astronomy and Ionosphere Center (NAIC) near Arecibo, Puerto Rico. (Photo courtesy of NAIC/National Science Foundation-Arecibo Observatory)

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from article Radio telescope

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The 27-element Karl G. Jansky Very Large Array of the National Radio Astronomy Observatory (NRAO) near Socorro, New Mexico, in its most compact configuration. (Photo courtesy of National Radio Astronomy Observatory/Associated Universities,…

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from article Radio telescope

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Artist's conception of the 10-element Very Long Baseline Array. Signals from each of the 10 antennas are independently recorded on computer disks, which are then sent to the array headquarters in Socorro, New Mexico for processing to form radio…

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from article Radio telescope

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Artist's conception of the RadioAstron spacecraft. Working together with ground-based radio telescopes, RadioAstron interferometer baselines up to 350,000 km (220,000 mi) are possible, corresponding to an angular resolution of only 10…

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from article Oncolytic virotherapy

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One notable experimental oncolytic virotherapy technique involves the use of a modified poliovirus (PVS-RIPO) to combat glioblastoma (a type of brain cancer). The illustration shows a hypothetical model of how PVS-RIPO destroys brain tumors.

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from article Galaxy

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The galaxy cluster Cl 0024+17 as seen by the Hubble Space Telescope, showcasing numerous spiral and elliptical galaxies. [Credit: NASA, ESA, M. J. Jee and H. Ford (Johns Hopkins University)]

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from article Galaxy

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Great Spiral Galaxy in Andromeda (M31, NGC 224) and its two small elliptical companions (M32, NGC 221, closer, at left; and NGC 205, farther, at right). (Credit: R. Gendler)

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from article Galaxy

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The Whirlpool Galaxy (NGC 5194), type Sc, and a companion irregular satellite (NGC 5195). [Credit: NASA, ESA, S. Beckwith (Space Telescope Science Institute), The Hubble Heritage Team (Space Telescope Science Institute/AURA)]

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from article Galaxy

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E0 galaxy M87 (NGC 4486) in the Virgo cluster, which is in the constellation of Virgo. This galaxy is a source of radio emission, and it has an active nucleus. (Credit: Canada-France-Hawaii Telescope)

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from article Galaxy

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The irregular galaxy NGC1569, a starburst galaxy, with very active star-formation. Gas and dust streams surround it. [Credit: NASA, ESA, The Hubble Heritage Team (Space Telescope Science Institute/AURA)]

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from article Galaxy

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Clustering characteristics of galaxies. This association of galaxies in the constellation of Coma is made up primarily of E and S0 type galaxies. [Credit: NASA, ESA, The Hubble Heritage Team (Space Telescope Science Institute/AURA)]

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from article Galaxy

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An artist's impression of a supermassive black hole in the heart of a galaxy. The black hole is surrounded by an accretion disk and is hurling out a relativistic jet of material, powering an active galactic nucleus. (Credit: NASA/JPL-Caltech)

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from article Bone disorders

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A colored x-ray of the hand of a patient with severe rheumatoid arthritis in all of the fingers. (Credit: Science Photo Library/Alamy Stock Photo)

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from article Bone disorders

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A colored X-ray of a linear displacement fracture of an ulna (forearm bone) of a man. (Credit: Puwadol Jaturawutthichai/Shutterstock)

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from article Bone disorders

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Comparison of a healthy normal bone (left) and a bone with osteoporosis (right). Osteoporosis leads to a decrease in bone mass and density, causing bones to become weak and brittle. (Credit: Stocktrek Images/Alamy Stock Photo)

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from article Titan

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Natural color view of Titan at left. The false-color view at right incorporates infrared light in place of red light, revealing surface details and clouds. Both images obtained by the Cassini orbiter. (Credit: NASA/JPL-Caltech/Space Science…

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