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  • Blackwell Publishing Ltd  (490)
  • 1990-1994  (490)
  • 1975-1979
  • 1992  (490)
  • 1
    Electronic Resource
    Electronic Resource
    DEVELOPMENT OF A MONOSCOPIC MEASUREMENT SYSTEM FOR SMALL FORMAT OBLIQUE PHOTOGRAPHY (1992)
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 14 (1992), S. 0 
    Details
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: This paper discusses development of a monoscopic measurement system for oblique photography, based upon space resection by collinearity. The method consists of enlarging 35 mm slides with a colour laser scanned copier, then digitising surveyed targets with a standard digitising tablet. Particular attention is given to systematic errors introduced by enlarging and digitising as well as to the accuracy of space resection solutions. 〈section xml:id="abs1-2"〉〈title type="main"〉Résumé On examine dans cet article le développement ďun systeme de mesure monoscopique pour photographies obliques, basé sur le relèvement dans ľespace et les équations de colinéarité. La méthode consiste à agrandir dans un copieur balayé par un laser de couleur, les diapositives 35 mm, puis à numériser sur une petite table à numériser standard les cibles qui ont été relevées. Les erreurs systématiques provenant de ľagrandissement et de la numérisation font ľobjet ďune attention particulière, ainsi que la précision des solutions du relévement dans ľespace. 〈section xml:id="abs1-3"〉〈title type="main"〉Zusammenfassung Im Artikel wird die Entwicklung eines monoskopischen Meβsystems für Schrägbilder diskutiert, das auf dem Rückwärtseinschnitt nach der Kolli-nearitätsbedingung beruht. Die Methode basiert auf der Vergröβergung von 35 mm-Diapositiven mit einem Laser-Farbkopierer und der nachfolgenden Digitalisierung vermessener Zieltafeln mit einem Standard-Digitalisier-tablett. Besondere Aufmerksamkeit wird sowohl den systematischen Feh-lern, die durch Vergröβerung und Digitalisierung entstehen, als auch der Genauigkeit der räumlichen Berechnungen gewidmet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1477-9730.1992.tb00255.x
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  • 2
    Electronic Resource
    Electronic Resource
    RecA protein of Escherichia coli and chromosome partitioning (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Molecular microbiology 6 (1992), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Escherichia coli cells deficient in RecA protein frequently contain an abnormal number of chromosomes after completion of ongoing rounds of DNA replication. This suggests that RecA protein may be required for correct timing of initiation of DNA replication; however, we show here that initiation of DNA replication is properly timed in recA mutants. We also find that more than 10% of recA mutant cells contain no DNA. These anucleate cells appear to arise from partitioning of all the DNA into one daughter cell and no DNA into the other daughter cell. Based on these and previously published results, we propose that RecA protein is required for equal partitioning of chromosomes into the two daughter cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2958.1992.tb01429.x
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of egg composition and prey density on the larval growth and survival of lake whitefish (Coregonus clupeaformis Mitchill) (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 40 (1992), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Eggs were collected from two stocks of lake whitefish, Coregonus clupeaformis, in Lakes Michigan and Huron to assess the effect of egg composition and prey density on larval growth and survival. Egg composition parameters including wet weight (mg egg−1), dry weight (mg egg−1), percent water, total caloric content (cal egg−1), caloric density (cal egg−1), percent lipid content, and total lipidcontent (mg egg−1) were measured. Fish hatched from six parental females in each stock were fed one of four rations (0, 18, 24, 50 brine shrimp larva−1 day−1) after yolk sac absorption. Length at hatch, endogenous growth, exogenous growth, and survival were measured during a 42-day laboratory experiment. Length at hatch of larvae was positively related to egg caloric content (r2=0.780). Endogenous growth for lake whitefish larvae was positively related to percent lipid content (r2=0.896) and total egg lipid content (r2=0.876) of parental females. Exogenous growth and survival of larval lake whitefish was positively related to prey availability. Larval fish growth was accurately modelled (r2=0.973) as a function of prey abundance using a threshold-corrected hyperbolic equation. These results indicate that both egg composition and prey availability have the potential to influence the growth and survival dynamics of larval lake whitefish significantly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1992.tb02585.x
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  • 4
    Electronic Resource
    Electronic Resource
    THE OCULAR SECRETIONS OF THE BOTTLENOSE DOLPHIN TURSIOPS TRUNCATUS (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 8 (1992), S. 0 
    Details
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: A viscous ocular secretion streams from the eyes of bottlenose dolphins, Tursiops truncatuss, removed from the water. The chemical composition and environmentally adaptive implications of this substance continue to perplex curators and scientists. Secretions from three dolphins were examined for deviations from literature values for normal human and terrestrial mammalian tear film components. Osmolality (x̄= 470 mOsm/kg), pH (x̄= 8.44) and glucose (x̄= 26.58 mg/100 ml) were significantly greater than human and terrestrial mammalian tear film values; while lysozyme (x̄= 0.005 mg/ml) and total cholesterol (x̄= 0.17 μg/μ1) were significantly less. Refractive index, sodium ion concentration, and potassium tear to plasma ratios in the dolphin ocular secretion did not deviate significantly from human or terrestrial mammalian tears. Electrophoresis of dolphin tears yielded four major protein bands (probably lactoferrin, serum albumin, teat specific prealbumin, and lysozyme) and high molecular weight glycoproteins similar to human tears. The chemical composition of the T. truncatus ocular secretion suggests that the circumorbital conjunctival gland may be analogous (relative to refractive index, electrolytes, and component protein) to the terrestrial lachrymal gland. At the functional level the T. truncatus ocular secretion may reduce hydrodynamic resistance on the cornea and protect it from bacterial invasion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1748-7692.1992.tb00125.x
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  • 5
    Electronic Resource
    Electronic Resource
    Chance Constrained Programming Approach to Empirical Analyses of Mutual Fund Investment Strategies (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Decision sciences 23 (1992), S. 0 
    Details
    ISSN: 1540-5915
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: Chance constrained programming concepts are used to formalize risk and return relations which are then modeled for use in an empirical study of mutual fund behavior during the period 1984 through 1988. The publicly announced strategies of individual funds are used to form ex ante risk classifications which are employed in examining ex post performance. Negative relations between risk and return held in every year of the period studied. The bearing of these negative risk-return findings for the Bowman paradox, as studied in the strategic management literature, are thus extended from the industrial firms studied by Bowman (and others) and shown to be present even in these investment oriented mutual funds in each of the years of the great bull market from 1984 through 1988. Finally, our use of chance constrained programming enables us to separate risk from return behavior and evaluate their relative strengths as sources of these negative relations, which are found to be more in the returns than the risks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1540-5915.1992.tb00396.x
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  • 6
    Electronic Resource
    Electronic Resource
    Age and Dietary Factors in Hippocampal Sensitivity to Trimethyltin (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 648 (1992), 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.1749-6632.1992.tb24575.x
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  • 7
    Electronic Resource
    Electronic Resource
    Practical Aspects of Yield Investigations of Groundwater Sources (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 6 (1992), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Lee Valley Water plc has, in a joint study with the University of Birmingham, been reassessing the reliable yields of its existing chalk sources in order to make maximum use of the available groundwater resources. An approach to yield assessment was developed which took into account the hydrogeology and flow processes in the vicinity of pumping stations, and within the contributing area. The yield of many sources was found to be very dependent on regional water level conditions. Initial estimates of potential yields were made but future monitoring should aim to clarify the interrelationship between source output and aquifer state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.1992.tb00769.x
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  • 8
    Electronic Resource
    Electronic Resource
    Enzymes for Epimerization of Isopenicillin N, Ring Expansion of Penicillin N, and 3'-Hydroxylation of Deacetoxycephalosporin C (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 672 (1992), 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.1749-6632.1992.tb35649.x
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  • 9
    Electronic Resource
    Electronic Resource
    New Developments in the Synthesis of Natural and Unnatural Amino Acids (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 672 (1992), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Notes: Amino acids play an important role in biochemistry and chemistry. They are the building blocks of proteins and play an essential role in the regulation of the metabolism of living organisms.In general, it can be stated that microbial processes (fermentation) are the industrial production methods of choice for large-scale production of naturally occuring proteinogenic L-α-H-amino acids, while for the production of synthetic D- and/or L-α-H-amino acids, several other methods are highly competitive.At DSM, several routes, i.e., (chemoenzymatic) synthesis, towards L-α-H and D-α-H-amino acids have been elaborated since the midseventies.A general process for the synthesis of natural as well as synthetic optically pure amino acids has been developed, using an enzymatic kinetic resolution step on racemic amino acid amides as the key step. In this case, both enantiomers of the α-H-amino acids are prepared in one single step. This process has been commercialized since 1988.More recent developments using L- or D-amino peptidases in combination with amino acid amide racemases and an asymmetric transformation concept are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1992.tb35665.x
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  • 10
    Electronic Resource
    Electronic Resource
    Ischemia: Reperfusion Injury and Restenosis after Coronary Angioplasty (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 669 (1992), 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.1749-6632.1992.tb17102.x
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