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  • Articles  (75)
  • 1995-1999  (75)
  • 1975-1979
  • 1965-1969
  • 1997  (75)
  • Geosciences  (52)
  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (15)
  • Process Engineering, Biotechnology, Nutrition Technology  (8)
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  • Articles  (75)
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  • 1995-1999  (75)
  • 1975-1979
  • 1965-1969
Year
Journal
Topic
  • 1
    Electronic Resource
    Electronic Resource
    Production and characterization of a plant α-hydroxynitrile lyase in Escherichia coli (1997)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 53 (1997), S. 332-338 
    Details
    ISSN: 0006-3592
    Keywords: α-hydroxynitrile lyase ; cassava ; cyanogenesis ; cyanohydrin ; Escherichia coli expression vector ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The coding sequence of the cyanogenic α-hydroxynitrile lyase gene of Manihot esculenta Crantz (cassava) was cloned in the plasmid vector pMal-c2 and expressed in Escherichia coli strain JM105. DNA sequencing showed that the recombinant plasmid contained the same sequence as the cDNA clone pHNL10. Peptide sequencing of the recombinant protein showed that the N-terminus was heterogeneous, with either four or six additional amino acid residues compared with the native protein. Circular dichroism spectra indicated similar secondary structure contents for both proteins. Enzyme assays showed that specific activity of native and recombinant proteins were 0.24 and 0.26 mmol CN-/mg/min, respectively; that both proteins had optimal activity at 40°C and pH 5.5; and that both proteins were inhibited by the serine protease inhibitor phenyl-methane sulfonyl flouride (PMSF). Isoelectric focusing of native and recombinant protein revealed multiple isoforms for both proteins; the recombinant protein had a more basic mean isoelectric point (pl) (5.1) than the native protein (4.5). © 1997 John Wiley & Sons, Inc. Biotechnol Bioeng 53: 332-338, 1997.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Cadmium Glutamate Dihydrate (1997)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 53 (1997), S. 1815-1816 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270197009426
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  • 3
    Electronic Resource
    Electronic Resource
    2-Amino-6-fluorobenzothiazole (1997)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 53 (1997), S. 381-383 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270196014369
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  • 4
    Electronic Resource
    Electronic Resource
    N,N'-Bis(pentafluorophenyl)urea (1997)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 53 (1997), S. 455-457 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S010827019601428X
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  • 5
    Electronic Resource
    Electronic Resource
    Coral Reefs: Progress and change as we approach the 21st Century (1997)
    Springer
    Coral reefs 16 (1997), S. 1-1 
    Details
    ISSN: 1432-0975
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003380050051
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  • 6
    Electronic Resource
    Electronic Resource
    Geochemistry and stratigraphic correlation of basalt lavas beneath the Idaho Chemical Processing Plant, Idaho National Engineering Laboratory (1997)
    Springer
    Environmental geology 30 (1997), S. 108-118 
    Details
    ISSN: 1432-0495
    Keywords: Key words Stratigraphy ; Basalt ; Geochemistry ; Snake River Plain aquifer ; Idaho National Engineering Laboratory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  Thirty-nine samples of basaltic core were collected from wells 121 and 123, located approximately 1.8 km apart north and south of the Idaho Chemical Processing Plant at the Idaho National Engineering Laboratory. Samples were collected from depths ranging from 15 to 221 m below land surface for the purpose of establishing stratigraphic correlations between these two wells. Elemental analyses indicate that the basalts consist of three principal chemical types. Two of these types are each represented by a single basalt flow in each well. The third chemical type is represented by many basalt flows and includes a broad range of chemical compositions that is distinguished from the other two types. Basalt flows within the third type were identified by hierarchical K-cluster analysis of 14 representative elements: Fe, Ca, K, Na, Sc, Co, La, Ce, Sm, Eu, Yb, Hf, Ta, and Th. Cluster analyses indicate correlations of basalt flows between wells 121 and 123 at depths of approximately 38–40 m, 125–128 m, 131–137 m, 149–158 m, and 183–198 m. Probable correlations also are indicated for at least seven other depth intervals. Basalt flows in several depth intervals do not correlate on the basis of chemical compositions, thus reflecting possible flow margins in the sequence between the wells. Multi-element chemical data provide a useful method for determining stratigraphic correlations of basalt in the upper 1–2 km of the eastern Snake River Plain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002540050138
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  • 7
    Electronic Resource
    Electronic Resource
    Mineralogical and geochemical signature of mine waste contamination, Tresillian River, Fal Estuary, Cornwall, UK (1997)
    Springer
    Environmental geology 29 (1997), S. 58-65 
    Details
    ISSN: 1432-0495
    Keywords: Key words Mine waste contamination ; Cornwall ; UK
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  The mineralized district of SW England was one of the world's greatest mining areas, with mining commencing in the Bronze age, peaking in the 1850s to 1890s, but still continuing to the present day. Consequently, it is not surprising that mining has had a major impact on the environmental geochemistry of SW England. In this study, the mineralogical and geochemical signature of mine waste contamination within the Fal Estuary at Tresillian, Cornwall, has been examined. A pulse of mine waste contamination is recognized at approximately 50 cm below present day sediment surface. Sn, As, Cu, Pb, and Zn are all enriched within this contaminated interval with up to 1800 mg kg–1 Sn, 290 mg kg–1 As, 508 mg kg–1 Pb, 2210 mg kg–1 Zn, and 1380 mg kg–1 Cu. Within this interval, the dominant minerals present include chalcopyrite, arsenopyrite, pyrite, cassiterite, Fe–Ti oxides (ilmenite and ?rutile), wolframite, sphalerite, baryte, zircon, monazite, tourmaline and xenotime. In addition, man-made slag products commonly occur. The exact timing of the release of mine waste into the estuary is poorly constrained, but probably occurred during or immediately following the peak in mining activity in the nearby Camborne-Redruth district, which was between 1853 and 1893. The mine waste may have entered the estuary either via the Tresillian River and its tributaries or via Calenick Creek and the Truro River and/or the Carnon River which flows into Rostronguet Creek.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002540050104
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  • 8
    Electronic Resource
    Electronic Resource
    The response of the magnetosphere to the passage of a coronal mass ejection on March 20–21 1990 (1997)
    Springer
    Annales geophysicae 15 (1997), S. 671-684 
    Details
    ISSN: 0992-7689
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The geomagnetic response to the passage of a coronal mass ejection (CME) is studied. The passage of the CME resulted in a storm sudden commencement (SSC) at 2243 UT on March 20 1990 with disturbed magnetic activity during the following 24 h. The auroral, sub-auroral and equatorial magnetic response to the southward turning at 1314 (±5) UT on March 21 and the equatorial response to the southward turning associated with the SSC on 20 March are discussed in terms of existing models. It is found that the auroral and sub-auroral response to the southward turning associated with the SSC is a factor 2 or more quicker than normal due to the shock in the solar wind dynamic pressure. The low-latitude response time to the south-ward turning, characterised by Dst and the magneto-pause current corrected Dst*, is una.ected by the shock. Dst and Dst*, characteristic of the equatorial magnetic field, responded to the 1314 (±5) UT southward turning prior to the first observed substorm expansion phase onset, suggesting that a dayside loading process was responsible for the initial enhancement in the ring current rather than nightside particle injection. The response time of the auroral and sub-auroral magnetic field to the southward turning at 1314 (±5) UT on March 21 is measured at a variety of longitudes and latitudes. The azimuthal propagation velocity of the response to the southward turning varied considerably with latitude, ranging from #x0223C;8 km s−1 at 67°N to ∼4 kms−1 at 55°N. The southward velocity of the equatorward boundary of the northern polar convection pattern has been measured. This velocity was ∼1.2 km s−1 at 1600 MLT, although there was evidence that this may vary at different local times.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-997-0671-4
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  • 9
    Electronic Resource
    Electronic Resource
    Utilization of bioremediation processes for the treatment of PAH-contaminated sediments (1997)
    Springer
    Journal of industrial microbiology and biotechnology 18 (1997), S. 152-160 
    Details
    ISSN: 1476-5535
    Keywords: Keywords: review; biodegradation; polycyclic aromatic hydrocarbons; sediments
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The widespread contamination of aquatic sediments by polycyclic aromatic hydrocarbons (PAHs) has created a need for cost-effective remediation processes. Many common PAHs are biodegradable, leading to studies investigating the potential of sediment bioremediation. This article reviews several factors that currently complicate the implementation of sediment bioremediation processes: the effect of complex mixtures of contaminants on the rate and extent of degradation observed, the bioavailability of PAHs in sorbed- and nonaqueous-phase, and methods being evaluated to enhance degradation/availability (surfactant-enhanced solubility, nutrient addition, and bioaugmentation).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/sj.jim.2900308
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  • 10
    Electronic Resource
    Electronic Resource
    Anaerobic transformation of 2,4,6-TNT and related nitroaromatic compounds by Clostridium acetobutylicum (1997)
    Springer
    Journal of industrial microbiology and biotechnology 18 (1997), S. 198-203 
    Details
    ISSN: 1476-5535
    Keywords: Keywords: TNT; Clostridium acetobutylicum; transformation kinetics; transformation extent; mass balance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The transformation of TNT and related aminated nitrotoluenes by Clostridium acetobutylicum was investigated. 2,4,6-trinitrotoluene (TNT) was rapidly reduced (537 nM min−1 mg protein−1) to undetermined end products via monohydroxylamino derivatives. TNT reduction was more rapid than that of 2-amino-4,6-dinitrotoluene, 4-amino-2,6-dinitrotoluene and 2,4-diamino-6-nitrotoluene. The metabolic phase of clostridial cultures affected rates and extents of transformation of TNT and its intermediates. Acidogenic cultures showed rapid transformation rates and the ability to transform TNT and its primary reduction products to below detection limits; solventogenic cultures did not transform TNT completely, and showed accumulation of its hydroxylamino derivatives. Carbon monoxide-induced solventogenesis was capable of slowing the transformation of TNT and intermediates. Studies employing [ring-U-14C]-TNT demonstrated that no significant mineralization occurred and that products of transformation were water-soluble.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/sj.jim.2900328
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