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  • 1
    Series available for loan
    Series available for loan
    Environmental studies of mineral deposits in Alaska (1996)
    Washington, DC : United States Gov. Print. Off.
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    Call number: SR 90.0001(2156)
    In: U.S. Geological Survey bulletin
    Type of Medium: Series available for loan
    Pages: IV, 40 S.
    Series Statement: U.S. Geological Survey bulletin 2156
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
    Series available for loan
    Series available for loan
    Geologic studies in Alaska by the U.S. Geological Survey, 1996 (1998)
    Washington, DC : United States Gov. Print. Off.
    Associated volumes
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    Call number: SR 90.0002(1595)
    In: Professional paper
    Type of Medium: Series available for loan
    Pages: VI, 200 S.
    Series Statement: U.S. Geological Survey professional paper 1595
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 3
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    Geologic studies of Mercury by the U.S. Geological Survey (2003)
    Reston, Va. : U.S. Geological Survey
    Associated volumes
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    Call number: S 90.0003(1248)
    In: U.S. Geological Survey circular
    Type of Medium: Series available for loan
    Pages: 41 S.
    ISBN: 060792621X
    Series Statement: U.S. Geological Survey circular 1248
    Location: Lower compact magazine
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  • 4
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    Tab. 1: Trace-element concentrations in ore samples collected from mercury mines and deposits in southwestern Alaska
    PANGAEA
    In:  Supplement to: Gray, John E; Gent, Carol A; Snee, Lawrence W (2000): The southwestern Alaska Mercury Belt and its relationship to the circum-Pacific metallogenic mercury province. Polarforschung, 68, 187-196, hdl:10013/epic.29806.d001
    Details
    Publication Date: 2023-05-12
    Description: A belt of small but numerous mercury deposits extends for about 500 km in the Kuskokwim River region of southwestern Alaska. The southwestern Alaska mercury belt is part of widespread mercury deposits of the circum Pacific region that are similar to other mercury deposits throughout the world because they are epithermal with formation temperatures of about 200 °C, the ore is dominantly cinnabar with Hg-Sb-As±Au geochemistry, and mineralized forms include vein, vein breccias, stockworks, replacements, and disseminations. The southwestern Alaska mercury belt has produced about 1400 t of mercury, which is small on an international scale. However, additional mercury deposits are likely to be discovered because the terrain is topographically low with significant vegetation cover. Anomalous concentrations of gold in cinnabar ore suggest that gold deposits are possible in higher temperature environments below some of the Alaska mercury deposits. We correlate mineralization of the southwestern Alaska mercury deposits with Late Cretaceous and early Tertiary igneous activity. Our 40Ar/39Ar ages of 70 ±3 Ma from hydrothermal sericites in the mercury deposits indicate a temporal association of igneous activity and mineralization. Furthermore, we suggest that our geological ancl geochemical data from the mercury deposits indicate that ore fluids were generated primarily in surrounding sedimentary wall rocks when they were cut by Late Cretaceous and early Tertiary intrusions. In our ore genesis model, igneous activity provided the heat to initiate dehydration reactions and expel fluids from hydrous minerals and formational waters in the surrounding sedimentary wall rocks, causing thermal convection and hydrothermal fluid flow through permeable rocks and along fractures and faults. Our isotopic data from sulfide and alteration minerals of the mercury deposits indicate that ore fluids were derived from multiple sources, with most ore fluids originating from the sedimentary wall rocks.
    Keywords: Antimony; Arsenic; Atomic absorption spectrometry (AAS); Barometer_mine; Cinnabar_Creek_mine; Code; Copper; Decourcy_Mountain_mine; Event label; Fairview_prospect; Geological sample; GEOS; Gold; ICP, Inductively coupled plasma; Kolmakof_mine; Lead; Mercury; Red_Devil_mine; Rhyolite_prospect; Sample code/label; Silver; SW Alaska, USA; White_Mountain_mine; Zinc
    Type: Dataset
    Format: text/tab-separated-values, 173 data points
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  • 5
    Electronic Resource
    Electronic Resource
    Functional 70S hybrid ribosomes from blue-green algae and bacteria (1976)
    Springer
    Archives of microbiology 109 (1976), S. 95-99 
    Details
    ISSN: 1432-072X
    Keywords: Anacystis nidulans ; Escherichia coli ; Hybrid ribosomes ; Ribosomes ; Procaryotic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Hybrid 70S ribosomes were produced by combining Anacystis nidulans and Escherichia coli 30S and 50S subunits. Both the A. nidulans 30S-E. coli 50S and E. coli 30S- A. nidulans 50S hybrids were functional in synthesizing protein when tested in a standard in vitro amino acid incorporating system. Both 70S hybrids were inhibited by streptomycin but the degree of inhibition was dependent upon the source of the 30S subunit. The ability to form functional 70S ribosomes from subunits of blue-green algae and bacteria is further evidence of the procaryotic nature of blue-greens and of the functional homology of the two protein synthesizing systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00425118
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  • 6
    Electronic Resource
    Electronic Resource
    Micromachined YBaCuO capacitor structures as uncooled pyroelectric infrared detectors (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 84 (1998), S. 1680-1687 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Uncooled pyroelectric infrared detectors based on semiconducting Y–Ba–Cu–O have been investigated. Samples with four different structures were characterized. Two of the pyroelectric detectors were thermally isolated from the substrate by micromachining techniques for high optical sensitivity. Pyroelectricity was observed by the methods of optical illumination and direct substrate heating. A wide range of the values of pyroelectric coefficients was obtained with the maximum close to 20 μC/cm2 K in one device. Detectivities up to 108 cm Hz1/2/W were measured. The temperature dependence of these pyroelectric sensors was investigated. It was found that one device showed a fairly constant optical response with respect to temperature over a wide range around 300 K. However, responsivity of another device of a different geometry decreased sharply at ∼304 K. The spectral study of these devices showed that the wavelength-dependent response decreased when the silicon transmission increased. In addition, frontside illumination evoked a much stronger response than backside illumination. This is attributed to the enhancing effect of the microcavity under the bridge and the transmission properties of the silicon substrate. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.368257
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  • 7
    Electronic Resource
    Electronic Resource
    Location of the rho gene and characterization of λ ilv-gal derivatives of λ ilv-rho bacteriophage (1984)
    Springer
    Molecular genetics and genomics 193 (1984), S. 205-209 
    Details
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The location of the rho gene and its position relative to the ilv genes of Escherichia coli K-12 was analyzed using genetic criteria, restriction enzyme cleavage, and maxicell analysis. Plasmids were constructed with deletions of the rho gene introduced in vitro, and λ ilv-gal derivatives of λ ilv-rho bacteriophage were isolated by recombination in vivo. A HindIII restriction fragment of 8 kilobases (kb) previously shown to contain at least part of the rho gene (Gray et al. 1981) was cloned into plasmid pMC81. This vector has transcription stop sites that present read-through expression of cloned genes from either direction, and cloning sites upstream of the lacZ gene coding for β-galactosidase. The position of the rho gene and flanking sequences required for its expression were further localized to a region of approximately 2 kb by introducing deletions using restriction enzyme treatment of these plasmids. A promoter in the rho region was found to direct β-galactosidase synthesis in these plasmid derivatives. Derivatives of λ ilv-rho phage were isolated in vivo by pyrophosphate chelation selection for phage with reduced genome size. Restriction enzyme analysis of twelve of these derivatives revealed an unexpected bias towards phage recombinants as opposed to simple internal deletions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00330668
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  • 8
    Electronic Resource
    Electronic Resource
    Autoregulation of the rho gene of Escherichia coli K-12 (1984)
    Springer
    Molecular genetics and genomics 193 (1984), S. 210-213 
    Details
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary It has previously been proposed, based on indirect evidence, that the Rho protein may control the expression of the rho gene. Using an in vitro system for the transcription and translation of the rho gene cloned into plasmid pBR322, we tested this hypothesis directly by monitoring the effect in vitro of excess or limiting Rho protein. The addition of purified Rho protein suppresses Rho synthesis in vitro. The addition of antibody to Rho specifically stimulates Rho synthesis in vitro. The stimulation of Rho factor synthesis by antibody to Rho is reversed by Rho protein. Rho factor purified from a strain with a mutationally altered rho gene (rho-115) does not suppress Rho synthesis in vitro. These results provide convincing evidence that the rho gene is subject to autoregulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00330669
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  • 9
    Electronic Resource
    Electronic Resource
    Identification of the protein products of the rrnC, ilv, rho region of the Escherichia coli K-12 chromosome (1981)
    Springer
    Molecular genetics and genomics 183 (1981), S. 428-436 
    Details
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Two methods have been used to identify the protein products of the Escherichia coli K-12 ilv region at 84 min and the flanking rrnC (counterclockwise) and rho (clockwise) loci. First, a set of λdilv specialized transducing phages, including some phages that carry rho and others that carry part of rrnC, was used to infect UV irradiated cells. The proteins produced by the infecting λdilv phage were selectively labelled with radioactive amino acids and identified by SDS gel electrophoresis and autoradiography. Second, restriction enzyme fragments were cloned from the λdilv phage into pBR322 and the plasmid specific gene products produced in maxicells were similarly identified by SDS gel electrophoresis and autoradiography. The proteins produced were correlated with specific genes and restriction enzyme fragments present in the λdilv phage and the pBR322 derivatives. Several ilv gene products that have previously been refractory to protein purification attempts have been identified for the first time by this technique. The presence of mutations at the ilvO site is shown to activate the cryptic ilvG gene and to result in the production of a 62,000 dalton protein. A 15,000 dalton protein of unknown function is synthesized from a DNA segment between ilv and rrnC. The rho gene was cloned from λdilv phage into pBR322 and shown to be dominant to a rho mutation on the host cromosome. The rho gene product and four additional proteins coded by genes near or between rho and ilv have been detected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00268761
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  • 10
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    In Vitro Studies Evaluating Leaching of Mercury from Mine Waste Calcine Using Simulated Human Body Fluids (2010)
    American Chemical Society
    Details
    Publication Date: 2010-06-15
    Print ISSN: 0013-936X
    Electronic ISSN: 1520-5851
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Published by American Chemical Society
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