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  • 1
    Electronic Resource
    Electronic Resource
    EPR and EXAFS studies of glucose isomerase activation by divalent metals (1986)
    Springer
    Bioprocess and biosystems engineering 1 (1986), S. 71-77 
    Details
    ISSN: 1432-0797
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The interactions of Mn2+ and Co2+ with glucose isomerases from three microbial sources have been studied using various direct physical methods. Co2+ was found to activate each enzyme, although the degree of activation varied significantly for enzymes from different organisms. EPR spectroscopy measurements revealed that dissimilarities in the coordination sphere of enzyme-bound Mn2+ accompanied the differences in enzyme activity. Variations in the EPR spectra of a nitroxide spin label coupled to two of the three isomerases, possibly near their active sites, were also observed. In no case was the EPR spectrum influenced by Co2+ addition, a result discordant with the hypothesis that Co2+ activates the enzyme by inducing a conformational change. The proximal biochemical environment of enzymebound Co2+ was also examined using EXAFS spectroscopy. This method showed that glucose causes notable changes in the ligand environment of the enzyme-bound metal, suggesting the formation of an enzyme-metal-substrate bridge complex. The significance of these results relative to possible reaction mechanisms is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00387498
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  • 2
    Electronic Resource
    Electronic Resource
    Non-penetrating trauma to the carotid artery with secondary thrombosis and embolism: Treatment by Thrombolysin (1977)
    Springer
    Acta neurochirurgica 37 (1977), S. 219-244 
    Details
    ISSN: 0942-0940
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A case of partially occluding post-traumatic thrombosis of the internal carotid artery and secondary embolism of the middle cerebral artery is reported. The patient was treated with Thrombolysin with coincident resolution of clinical symptoms and signs and clearing of the lesions on arteriography. This may have been fortuitous. The subject of traumatic carotid artery thrombosis is reviewed in detail, and its pathophysiology is discussed, especially in relation to facts known about occlusive vascular disease secondary to atherosclerosis and related embolie phenomena. Suggestions are made concerning the treatment of this condition, especially with regard to developing rational criteria for opening vascular beds through evaluation of collateral cerebral blood flow. The uses of microvascular surgical techniques and thrombolytic therapy are considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01402128
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  • 3
    Electronic Resource
    Electronic Resource
    BACTERIA-INDUCED BIOCHEMICAL CHANGES IN CHICKEN SKIN STORED AT 5°C (1970)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 35 (1970), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: SUMMARY: The effect of psychrotolerant bacteria on the water-holding capacity as measured by the extract release volume (ERV), pH and protein degradation in chicken skin stored at 5°C was determined using strains of Achromobacter and pigmented and nonpigmented Pseudomonas. All organisms caused a rapid decrease in ERV to about 50% of the original value during the early log phase of growth before development of off-odor. Changes in pH and content of extractable nitrogenous materials occurred during bacterial growth but were not pronounced until after the count was greater than 108 cells/g of skin and a faint off-odor was detectable. The content of extractable materials decreased during the early log phase, corresponding to the period of rapid increase in pH; later, during the late log or stationary phases of growth, it rapidly or gradually increased, depending on the organism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1970.tb12113.x
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  • 4
    Electronic Resource
    Electronic Resource
    Invulnerable Queens on an Infinite Chessboard (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 555 (1989), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1989.tb22444.x
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  • 5
    Electronic Resource
    Electronic Resource
    Submerged Citric Acid Fermentation of Sugar Beet Molasses. Effect of Ferrocyanide Control (1962)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 1 (1962), S. 59-62 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/i360001a013
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  • 6
    Electronic Resource
    Electronic Resource
    Spectroscopic Studies of Structure-Function Relationships in Free and Immobilized Alcohol Dehydrogenase (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 506 (1987), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1987.tb23814.x
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  • 7
    Electronic Resource
    Electronic Resource
    EFFECT OF PSYCHROTOLERANT BACTERIA ON THE AMINO ACID CONTENT OF CHICKEN SKIN (1970)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 35 (1970), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Changes induced by type-cultures of Achromobacter, nonpigmented Pseudomonas, pigmented Pseudomonas and a mixture of all three types in the amino acid content of fresh chicken skin were studied during storage at PC for up to 21 days. The Achromobacter and nonpigmented Pseudomonas cultures reduced the amount of all amino acids to below detectable levels during the early log phase of growth and produced no detectable change subsequently. The pigmented Pseudomonas caused no appreciable change initially but produced a marked increase in the amount of most amino acids during the late log phase, after off-odor had developed; an increase in free and total extractable proline and hydroxyproline indicated that collagenous proteins were attacked. The mixed inoculum gave intermediate results, producing comparatively little change in the total free amino acid content throughout the incubation period. Results indicate that the pigmented pseudomonads are the most proteolytic of the common types of psychrotolerant spoilage bacteria and that they possess collagenase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1970.tb12160.x
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  • 8
    Electronic Resource
    Electronic Resource
    Quasiperiodic tilings with low-order rotational symmetry (1991)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 47 (1991), S. 498-502 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Using a projection method of de Bruijn [Proc. K. Ned. Akad. Wet. Ser. A (1981), 43, 39–66], Whittaker & Whittaker [Acta Cryst. (1988), A44, 105–112] obtained nonperiodic tilings of the plane with n-fold rotational symmetry, n = 5, 7, 8, 9, 10 and 12. However, when their method was applied to the cases of 3-, 4- and 6-fold rotational symmetry it produced periodic tilings. This might be taken as circumstantial evidence that 3-, 4- and 6-fold rotational symmetry is incompatible with nonperiodicity. It is demonstrated that they are compatible by constructing quasiperiodic tilings with only 3-, 4- and 6-fold rotational symmetry. This approach uses basic eigenvalue methods of matrix theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767391003392
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  • 9
    Electronic Resource
    Electronic Resource
    Quasiperiodic tilings with low-order rotational symmetry. Erratum (1991)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 47 (1991), S. 852-852 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Figs. 10(a), (b) of the paper by Clark & Suryanarayan [Acta Cryst. (1991), A47, 498–502] reproduced poorly. Revised figures with better contrast are here published.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767391011212
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  • 10
    Electronic Resource
    Electronic Resource
    Helix formation by poly{bis(hydroxyethyl)-L-glutamine} (1986)
    Springer
    Colloid & polymer science 264 (1986), S. 469-472 
    Details
    ISSN: 1435-1536
    Keywords: Helix-coil transition ; poly(hydroxyalkyl-L-glutamine) ; poly{bis(hydroxyethyl)-L-glutamine}
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Circular dichroism spectra are reported for poly {bis(hydroxyethyl)-L-glutamine}. Its conformation is predominantly that of a statistical coil at or above ambient temperature in water. It becomes partially helical upon cooling. The helix-forming potential of this polypeptide in water is between that of poly(hydroxyethyl-L-glutamine) and poly(hydroxypropyl-L-glutamine). The polypeptide has a large helix content when the solvent is rich in trifluoroethanol.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01421998
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