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  • 1
    Electronic Resource
    Electronic Resource
    Otolith microstructure and daily age of Anguilla japonica, Temminck & Schlegel elvers from the estuaries of Taiwan with reference to unit stock and larval migration (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: To test the hypothesis that the Japanese eel, Anguillu japonica, elvers in the eastern and western coasts of Taiwan are recruited from two different spawning grounds and to increase the knowledge of the early life history of the eel, the otolith microstructure and daily age of elvers collected from five estuaries in the coast of Taiwan during December 1989 through February 1990 were examined by scanning electron microscopy. The total length of elvers at arrival in the estuaries was similar among estuaries, averaging c. 56.0 mm and showed a seasonal decrease. The maximum radius of the sagittal otolith of elvers ranged from 124.46 to 181.82μm with a mean of 143.15 ± 12.72 μm. The otolith from centre to edge included an organic-rich primordium (9.20 ± 2.02 μm in diameter), a diffusively calcified core (20.94 ± 1.99 μm), and the daily growth increments; these three layers were probably deposited during the embryonic, yolk sac and feeding period respectively. The growth rate of the otolith was higher at the beginning of early life (0.5−1.0 μm day −1), lowest at approximately 100-days old (〈0.5 μm day−1), and highest 1 month before arrival at the estuary (〉 1.0 pm day−1). The mean age for elvers arriving in the estuaries of the coasts of Taiwan was approximately 170.4 ± 21.02 days. Neither the growth pattern of the otolith nor the age of elvers arriving in the estuary were significantly different among estuaries, indicating that the elvers in both eastern and western Taiwan were probably recruited from the same spawning ground. The growth pattern of the otolith in relation to larval migration was analysed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1992.tb02631.x
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  • 2
    Electronic Resource
    Electronic Resource
    Changes in otolith microchemistry of the Japanese eel, Anguitta japonica, during its migration from the ocean to the rivers of Taiwan (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 45 (1994), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The newly recruited Japanese eel, Anguilla japonica, elvers and 1-year-old eels collected in estuaries and in rivers, respectively, were studied. The microstructure and chemical composition of the sagittal otolith of these eels were examined by SEM and wavelength-dispersive spectrometer (WDS), A transition zone or‘elver mark’was observed in the otolith of the young eels. A comparison of the otoliths of elvers with those from the 1-year-old eels suggests that this transition zone was deposited during upstream migration, a change from a marine to freshwater environment. Strontium (Sr) content in the primordium of the otolith of both elvers and young eels was low, probably due to the maternal or freshwater origin of the oocyte. The concentration of Sr in the otolith increased gradually during marine life and reached a peak approximately 1 month before upstream migration. As the elvers entered the estuary, the Src concentration dramatically decreased and remained at a low level thereafter. These findings indicate that the history of the migratory environment of the eel can be reconstructed from a combined study of otolith microstructure and microchemistry analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1994.tb00933.x
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  • 3
    Electronic Resource
    Electronic Resource
    Enantioselective deprotection of N-protected amino acids by D-aminoacylase
    Amsterdam : Elsevier
    Bioorganic & Medicinal Chemistry Letters 2 (1992), S. 697-700 
    Details
    ISSN: 0960-894X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0960-894X(00)80394-7
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  • 4
    Electronic Resource
    Electronic Resource
    Polaron effects on the density of states for two-dimensional electrons in high magnetic fields
    Amsterdam : Elsevier
    Physics Letters A 192 (1994), S. 389-396 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(94)90225-9
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  • 5
    Electronic Resource
    Electronic Resource
    Purification and characterization of a novel glucooligosaccharide oxidase from Acremonium strictum T1
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Protein Structure and Molecular 1118 (1991), S. 41-47 
    Details
    ISSN: 0167-4838
    Keywords: (Acremonian) ; Enzyme characterization ; Enzyme purification ; Fungus ; Glucooligosaccharide oxidase
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0167-4838(91)90439-7
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  • 6
    Electronic Resource
    Electronic Resource
    Genetic aspects of bladder cancer progression (1991)
    Springer
    World journal of urology 9 (1991), S. 69-74 
    Details
    ISSN: 1433-8726
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Neoplasia is the result of cumulative genetic damage. Cytogenetic analysis identifies abnormalities of chromosome number and structure. Abnormal mode, wide variation in chromosome number, and aneuploidy are associated with loss of differentiation and advanced stage in bladder cancer. Marker chromosomes have been associated with increased risk of recurrence and progression of superficial, low-grade tumors. With the use of banding techniques, aberrations can be assigned to specific chromosomes and significant nonrandom abnormalities have been identified on chromosomes 1, 3, 5, 7, 9, 11, and 17. With the use of molecular biology techniques, allelic deletions, proto-oncogene activation, and mutations can be detected and correlated to the pathophysiologic events that determine the biologic behavior of a particular tumor. Allelic deletions of chromosome 9q are independent of stage and grade and suggest that loss of a tumor suppressor gene on chromosome 9q may be an important primary event in the genesis of bladder cancer. Deletions of chromosomes 11p and 17p, evident only in high-grade tumors, may be important in bladder cancer progression.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00184036
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  • 7
    Electronic Resource
    Electronic Resource
    Sono-anodic stripping voltammetric determination of cadmium in the presence of surfactant (2000)
    Springer
    Fresenius' journal of analytical chemistry 368 (2000), S. 415-417 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The effect of applying ultrasound in anodic stripping voltammetry analysis of Cd2+ in pH 4.6 buffer containing the surfactant Triton X-100 has been investigated. Manipulation of the horn intensity and the horn/electrode distance was found to reduce the deleterious influence of the surfactant on the height of the cadmium peak. The system has been optimised to take advantage of the in situ cleaning action offered by ultrasound. As a result facile detection of Cd2+ (0.05–4 μM) in solutions containing 10 μg/mL Triton X-100 can be achieved without recourse to sample pretreatments or electrode modifications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160000524
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  • 8
    Electronic Resource
    Electronic Resource
    Spectral domain analysis of open cavities (1992)
    Springer
    International journal of infrared and millimeter waves 13 (1992), S. 1571-1598 
    Details
    ISSN: 1572-9559
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01009236
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  • 9
    Electronic Resource
    Electronic Resource
    Changes of lipase-catalyzed lipolytic rates in a batch reactor (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 39 (1992), S. 1128-1132 
    Details
    ISSN: 0006-3592
    Keywords: lipolytic rates ; hydrolysis ; tributyrin ; Candida rugosa ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A dramatic change of the reaction rate was observed for the lipase-catalyzed hyrolysis of tributyrin in a batch reactor. Immediately after the addition of the enzyme, the lipolysis rate increased continuously until a maximal reaction rate was reached. The duration of the induction was mainly controlled by the bulk enzyme concentration and the reactor stirring speed. The reaction rate dropped sharply after reaching its maximal value. The lipolysis decayed at a rate of about 0.012 min-1, and was not affected by changes of the stirring speed. This decay was attributed to the fast deactivation of the surface-adsorbed lipase, and possibly to the extremely slow desorption of the inactivated species. For reaction time longer than 120 minutes, the lipolysis decreased at a much slower rate. Several mechanisms for the decay of the lipolysis rate were discussed.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260391108
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