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  • 1
    Electronic Resource
    Electronic Resource
    Capnocytophaga: New genus of Gram-negative gliding bacteria. III. Physiological characterization (1979)
    Springer
    Archives of microbiology 122 (1979), S. 29-33 
    Details
    ISSN: 1432-072X
    Keywords: Capnocytophaga ; Gliding bacteria ; CO2-requiring ; Gram-negative ; Periodontal diseases ; Physiology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Sixty-eight strains of capnophilic fusiform Gram-negative rods from the human oral cavity were subjected to extensive physiologic characterization, tested for susceptibility to various antibiotics, and the mol-percent guanine plus cytosine of each isolate determined. The characteristics of the isolates were compared with 10 fresh and 2 stock isolates of Fusobacterium nucleatum. The isolates clearly differed from the Fusobacterium species on the basis of molpercent guanine plus cytosine, end products, growth in a capnophilic environment and fermentation of carbohydrates. All of the gliding isolates required CO2 and formed acetate and succinate, but not H2S, indole or acetylmethylcarbinol. All fermented glucose, sucrose, maltose and mannose. The organisms may be differentiated on the basis of fermentation of additional carbohydrates, hydrolysis of polymers and reduction of nitrate. Three species are proposed: Capnocytophaga ochracea, Capnocytophaga sputigena and Capnocytophaga gingivalis. Ten isolates did not fit into the proposed species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00408042
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  • 2
    Electronic Resource
    Electronic Resource
    Capnocytophaga: New genus of Gram-negative gliding bacteria. II. Morphology and ultrastructure (1979)
    Springer
    Archives of microbiology 122 (1979), S. 17-27 
    Details
    ISSN: 1432-072X
    Keywords: Gliding bacteria ; CO2-requiring ; Periodontal disease ; Gram-negative ; Ultrastructure ; Capnocytophaga
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Gram-negative, anaerobic gliding bacteria were isolated from normal supragingival plaque and from periodontal lesions. Isolates could be divided into two size classes: small 2.4–4.2 μm×0.38–0.5 μm and large 4.8–5.8 μm×0.42–0.6 μm cells. The outer membrane was either loose-fitting and wavy, or taut, and of variable thickness. An electron-dense fuzz was discernible on several of the isolates. The periplasmic region was of variable electron-density. The genus Capnocytophaga has been proposed for these organisms based on morphological and cultural characteristics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00408041
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  • 3
    Electronic Resource
    Electronic Resource
    Capnocytophaga: New genus of gram-negative gliding bacteria I. General characteristics, taxonomic considerations and significance (1979)
    Springer
    Archives of microbiology 122 (1979), S. 9-16 
    Details
    ISSN: 1432-072X
    Keywords: Capnocytophaga ; Gliding bacteria ; CO2-requiring ; Gram-negative ; Periodontal diseases ; Taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The characteristics of gliding bacteria isolated from both healthy and diseased sites in the oral cavity are, summarized and the taxonomic position of the bacteria discussed. Uniform attributes of the fusiform isolates include gliding motility, strictly fermentative metabolism dependent on the presence of CO2 (or HCO 3 - ), under either anaerobic or aerobic conditions, presence of benzidine-reactive components, and the production of acetic and succinic acids as the major or sole, acidic, metabolic and products. Given the guanine and cytosine content of DNA, their gliding motility, and the ability of many strains to attack polysaccharide a relationship to the cytophagas is suggested. This relationship, along with the CO2-dependent growth is recognized by the generic name Capnocytophaga given them. Many of the isolates are grouped into three species C. ochracea, C. Sputigena, and C. gingivalis, separated on the basis of morphological and physiological traits.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00408040
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  • 4
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    Cosmic X-ray observations with OSO-8 (1976)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: The GSFC Cosmic X-ray Spectroscopy experiment aboard OSO-8 has operated successfully since launch providing spectral and temporal data on X-ray sources in tha energy range 2-60 keV. Analysis of quick look data shows a variety of spectral features, some stable, others variable, which will increase understanding of the nature of individual sources. In particular, observed emission and absorption features that can be attributed to iron will result in abundance measures of this important element in sources such as some X-ray binaries, the supernova remnant Cas A, and the nucleus of the galaxy Cen A.
    Keywords: SPACE RADIATION
    Type: X-ray Binaries; p 67-79
    Format: text
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  • 5
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    Galactic center iron line emission (1978)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Data from the Goddard Space Flight Center experiment on HEAO 1 were examined for galactic center iron line emission. Evidence for a 6.8 keV line from the summed flux within 10 deg longitude and 10 deg latitude of the galactic center was found; however, firm limits cannot be put on the intrinsic line width. If the line emission is diffuse and cosmic-ray-induced, the calculations of Bussard et al (1978) yield an upper limit to c-12 4.44 MeV line emission, which is not inconsistent with the results of Haymes et al (1975). Significant contributions to the iron line from discrete sources can not be ruled out.
    Keywords: SPACE RADIATION
    Type: Gamma Ray Spectry. in Astrophys.; p 302-309
    Format: text
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  • 6
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    The light curve of a transient X-ray source (1975)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: The Ariel-5 satellite has monitored the X-ray light curve of A1524-62 almost continuously from 40 days prior to maximum light until its disappearance below the effective experimental sensitivity. The source exhibited maximum light on Dec. 4, 1974, at a level of 0.9 the apparent magnitude of the Crab Nebula in the energy band 3-6 keV. Although similar to previously reported transient sources with a decay time constant of about 2 months, the source exhibited an extended, variable preflare on-state of about 1 month at a level of greater than 0.1 maximum light. The four bright (greater than 0.2 of the Crab Nebula) transient sources observed during the first half-year of Ariel-5 operation are indicative of a galactic disk distribution, a luminosity at maximum in excess of 10 to the 37-th power ergs/sec, a frequency of occurrence which may be as high as 100/yr, and a median decay time which is less than 1 month.
    Keywords: SPACE RADIATION
    Type: Astrophysical Journal; 201; Nov. 1
    Format: text
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  • 7
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    Long-term X-ray studies of Sco X-1 (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: No modulation of the 3-6 keV X-ray intensity of Sco X-1 at a level of excess of 1% was observed at the optical period of .787313d. Evidence is found for shot-noise character in a large fraction of the X-ray emission. Almost all of the Sco X-1 emission can be synthesized in terms of approximately 200 shots per day, each with a duration of approximately 1/3 day. A pinhole camera was used to obtain data and the data were statistically analyzed.
    Keywords: SPACE RADIATION
    Type: NASA-TM-X-71029 , X-661-75-303
    Format: application/pdf
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  • 8
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    Evidence for a 17-day periodicity from Cyg-X-3 (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Data taken from the Ariel-5 All Sky Monitor and the Ariel-5 Sky Survey Experiment are analyzed. It is hypothesized that a periodicity of 17d is characteristic of CygX-3. Results of the analysis are given.
    Keywords: SPACE RADIATION
    Type: NASA-TM-X-71030 , X-661-75-260
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  • 9
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    Discovery of iron line emission in the Hercules X-1 low state spectrum with HEAO-1 (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The line energy, equivalent width, binary phase dependence, and intrinsic width of the iron line emission feature observed in the low state sepctrum of Hercules X-1 are examined. Deductions are made concerning secondary X-ray emission from this binary system.
    Keywords: SPACE RADIATION
    Type: NASA-TM-79591
    Format: application/pdf
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  • 10
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    The cosmic X-ray experiment aboard HEAO-1 (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The HEAO-1 A-2 experiment, designed to study the large scale structure of the galaxy and the universe at X-ray energies is described. The instrument consists of six gas proportional counters of three types nominally covering the energy ranges of 0.15-3 keV, 1.2-20 keV, and 2.5-60 keV. The two low energy detectors have about 400 sq cm open area each while the four others have about 800 sq cm each. Dual field of view collimators allow the unambiguous determination of instrument internal background and diffuse X-ray brightness. Instrument characteristics and early performance are discussed.
    Keywords: SPACE RADIATION
    Type: NASA-TM-79574
    Format: application/pdf
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