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  • 11
    Electronic Resource
    Electronic Resource
    Wormhole effects on masses of vector and gravitino fields
    Amsterdam : Elsevier
    Physics Letters B 234 (1990), S. 473-479 
    Details
    ISSN: 0370-2693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0370-2693(90)92042-H
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  • 12
    Electronic Resource
    Electronic Resource
    Multi-gluon scattering: A string-based calculation
    Amsterdam : Elsevier
    Physics Letters B 201 (1988), S. 85-89 
    Details
    ISSN: 0370-2693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0370-2693(88)90085-8
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  • 13
    Electronic Resource
    Electronic Resource
    Spontaneous gauge symmetry breaking in conformal theories of a four-dimensional superstring
    Amsterdam : Elsevier
    Physics Letters B 233 (1989), S. 128-134 
    Details
    ISSN: 0370-2693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0370-2693(89)90628-X
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  • 14
    Electronic Resource
    Electronic Resource
    Heat-Shocked Lactobacilli for Acceleration of Cheddar Cheese Ripening (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 56 (1991), 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: The aim of this study was to establish adequate conditions for heat-shocking cells of lactobacilli, to sufficiently suppress lactic acid production without damaging the proteolytic enzyme system important for cheese maturation. Three temperatures, 65, 67 and 70°C were tested, for 22 sec. The best combination for maximum retardation of lactic acid production and minimum damage to the proteolytic system was obtained by treating cells at 67°C for 22 sec. Following such treatment, lactic acid production was retarded by 24 hr, while the proteolytic enzyme system remained scarcely unchanged.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1991.tb14612.x
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  • 15
    Electronic Resource
    Electronic Resource
    Microflora, Sensory and Exudate Changes of Vacuum- or Nitrogen-Packed Veal Chucks Under Different Storage Conditions (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 48 (1983), 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: Apart from increases in microflora number at —4°C under vacuum and at 0°C under nitrogen, there was in general no significant (P gt; 0.05) differences in numbers of lactobacilli, psychrotrophs, aerobes and anaerobes between vacuum- and nitrogen-packed veals during 49 days of storage at 3 and 7°C, regardless of dark and lighted displays. The initial psychrotrophs consisted primarily of Pseudomonas putida (〉 72%) but by day 49 Lactobacillus spp. comprised at least 64% of the total in both atmospheres. Sensory and exudate data showed a highly significant (P 〈 0.05) difference due to the effect of storage time and temperature above 0°C. Nitrogen-packed veals exhibited a lower incidence of greening and exudate loss at 0, 3 and 7°C. Light generally had important effects on off-odor and exudate loss, irrespective of package types.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1983.tb03532.x
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  • 16
    Electronic Resource
    Electronic Resource
    Oxidation of some reducing agents used in electroless plating baths at gold anodes in aqueous media (1992)
    Springer
    Journal of applied electrochemistry 22 (1992), S. 48-56 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The oxidation of four reductants, two of direct interest in electroless plating baths, at gold electrodes in base was investigated using cyclic voltammetry and the results were interpreted in terms of the incipient hydrous oxide model of electrocatalysis. Dimethylamine borane and tert-butylamine borane reacted in a similar manner; the results were interpreted in terms of the oxidation of the hydroxytri-hydroborate anion; potential/pH studies indicate that the important mediator at the interface for this reaction is a cationic, Au(I), species. Pyridine borane reacted in a significantly different manner; the mediating species in this case appeared to be an Au(III) hydrous oxide; further work is required to explain the behaviour of this system. The oxidation of hypophosphite on gold in base was quite sluggish, as was the oxidation of hypophosphorous aicd at low potentials in solutions of low pH; it was assumed here that in this system there is a complication due to phosphorous atoms adsorbing at, and thus deactivating, the gold surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01093011
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  • 17
    Electronic Resource
    Electronic Resource
    Torque Optimizing Control with Singularity-Robustness for Kinematically Redundant Robots (2000)
    Springer
    Journal of intelligent and robotic systems 28 (2000), S. 231-258 
    Details
    ISSN: 1573-0409
    Keywords: kinematically redundant manipulators ; torque-optimality ; singularity-robustness ; dynamic control equation ; weighted generalized inverses ; Jacobian-inertia product ; damped least-squares inverses ; generalized dynamic manipulability measure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A new control method for kinematically redundant manipulators having the properties of torque-optimality and singularity-robustness is developed. A dynamic control equation, an equation of joint torques that should be satisfied to get the desired dynamic behavior of the end-effector, is formulated using the feedback linearization theory. The optimal control law is determined by locally optimizing an appropriate norm of joint torques using the weighted generalized inverses of the manipulator Jacobian-inertia product. In addition, the optimal control law is augmented with fictitious joint damping forces to stabilize the uncontrolled dynamics acting in the null-space of the Jacobian-inertia product. This paper also presents a new method for the robust handling of robot kinematic singularities in the context of joint torque optimization. Control of the end-effector motions in the neighborhood of a singular configuration is based on the use of the damped least-squares inverse of the Jacobian-inertia product. A damping factor as a function of the generalized dynamic manipulability measure is introduced to reduce the end-effector acceleration error caused by the damping. The proposed control method is applied to the numerical model of SNU-ERC 3-DOF planar direct-drive manipulator.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008152705719
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  • 18
    Electronic Resource
    Electronic Resource
    Purification and characterization of X-prolyl dipeptidyl peptidase fromLactobacillus casei subsp.casei LLG (1994)
    Springer
    Applied microbiology and biotechnology 42 (1994), S. 280-286 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract X-Prolyl dipeptidyl peptidase, which hydrolysed X-Pro-Y almost specifically, has been purified to homogeneity from crude cell-free extracts ofLactobacillus casei subsp.casei LLG using fast protein liquid chromatography equipped with preparative and analytical anion exchange columns. The enzyme was purified to 274-fold by ammonium sulphate fractionation, and by two successive ion-exchange chromatographies with a recovery of 34%. The purified enzyme appeared as a single band on both native-polyacrylamide gel electrophoresis (PAGE) and sodium dodecyl sulphate (SDS)-PAGE and had a molecular mass of 79 kDa. The pH and the temperature optima by the purified enzyme were 7.0 and 50°C, respectively. X-PDP was a serine-dependent enzyme, as both diisopropylfluorophosphate and phenylmethylsulphonylfluoride caused complete inhibition of the enzyme activity. The Michaelis constant (K m ) and maximum reaction velocity (V max ) values were 0.2 mm and 43 mm per milligram, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00902729
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  • 19
    Electronic Resource
    Electronic Resource
    Identification of new enzyme activities of several strains of Thermus species (1995)
    Springer
    Applied microbiology and biotechnology 44 (1995), S. 81-87 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract New thermostable enzyme activities of seven Thermus strains were compared using the API ZYM system. All the strains exhibited high levels of α- and β-glycosidases, esterase (C4) and esterase-lipase (C8) activities intracellularly. Only T. thermophilus HB8 (ATCC 27634) showed α-glucosidase and esterase activities in the supernatant. According to the intensity of β-galactosidase activity, Thermus strains were divided in three groups. Group 0, which showed a weak β-galactosidase activity, included Thermus spp. ATCC 31674 (T351) and 27978 (X-1) as well as T. thermophilus ATCC 27634 (HB8). Group I which consisted of T. aquaticus ATCC 25104 (YT-1), ATCC 25105 (Y-VII-51B) and Thermus sp. ATCC 27737 (T2), had a specific activity of approximately 40.0 U mg−1 and galactose as inducer. T. aquaticus ATCC 31558 (group 2) was particularly effective for β-galactosidase production (2840 U) with a specific activity of 98 U mg−1. For each strain, galactose (0.5%) was a better inducer of β-galactosidase production than lactose (1%). The detection of β-galactosidase activity was dependent on the derivative chromogenic substrates used (naphthyl or nitrophenol coupled to sugar). Oligosaccharides were synthesized from cellobiose, lactulose, maltose or lactose as substrates at high temperature in some strains of Thermus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00164484
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  • 20
    Electronic Resource
    Electronic Resource
    Purification and characterization of X-prolyl dipeptidyl peptidase from Lactobacillus casei subsp. casei LLG (1994)
    Springer
    Applied microbiology and biotechnology 42 (1994), S. 280-286 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  X-Prolyl dipeptidyl peptidase, which hydrolysed X-Pro-Y almost specifically, has been purified to homogeneity from crude cell-free extracts of Lactobacillus casei subsp. casei LLG using fast protein liquid chromatography equipped with preparative and analytical anion exchange columns. The enzyme was purified to 274-fold by ammonium sulphate fractionation, and by two successive ion-exchange chromatographies with a recovery of 34%. The purified enzyme appeared as a single band on both native-polyacrylamide gel electrophoresis (PAGE) and sodium dodecyl sulphate (SDS)-PAGE and had a molecular mass of 79 kDa. The pH and the temperature optima by the purified enzyme were 7.0 and 50°C, respectively. X-PDP was a serine-dependent enzyme, as both diisopropylfluorophosphate and phenylmethylsulphonylfluoride caused complete inhibition of the enzyme activity. The Michaelis constant (K m ) and maximum reaction velocity (V max ) values were 0.2 mM and 43 mM per milligram, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00902729
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