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  • Springer  (103)
  • 2000-2004  (103)
  • 1950-1954
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  • 1
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    Arsenic Accumulation and Acute Toxicity in Aquacultural Juvenile Milkfish ( Chanos chanos ) from Blackfoot Disease Area in Taiwan (2004)
    Springer
    Details
    Publikationsdatum: 2004-02-01
    Print ISSN: 0007-4861
    Digitale ISSN: 1432-0800
    Thema: Energietechnik , Medizin
    Publiziert von Springer
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
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    Detection ofBurkholderia pseudomallei in rice fields with PCR-based technique (2003)
    Springer
    Details
    Publikationsdatum: 2003-07-01
    Print ISSN: 0015-5632
    Digitale ISSN: 1874-9356
    Thema: Biologie
    Publiziert von Springer
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  • 3
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    Effects of soil pH, temperature and water content on the growth ofBurkholderia pseudomallei (2003)
    Springer
    Details
    Publikationsdatum: 2003-03-01
    Print ISSN: 0015-5632
    Digitale ISSN: 1874-9356
    Thema: Biologie
    Publiziert von Springer
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Serotonergic Agonists Inhibit Calcium-Activated Potassium and Voltage-Dependent Sodium Currents in Rat Taste Receptor Cells (2000)
    Springer
    The journal of membrane biology 173 (2000), S. 127-138 
    Details
    ISSN: 1432-1424
    Schlagwort(e): Key words: Gustation — Signal transduction — 8OH-DPAT — TFMPP — Piperazine — 5HT1A receptor
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract. Recently we reported that rat taste receptor cells respond to the neurotransmitter serotonin with an inhibition of a calcium-activated potassium current [17]. In the present study, this observation is confirmed and extended by studying the effects of an array of serotonergic agonists on membrane properties, calcium-activated potassium current, and voltage-dependent sodium current in taste receptor cells using the patch-clamp recording technique in the whole-cell configuration. Serotonergic inhibition of calcium-activated potassium current was mimicked by the agonists N-(3-trifluoromethylphenyl)piperazine and by (±)-2-dipropylamino-8-hydroxy-1,2,3,4-tetrahydronaphthalene. Both produced reversible inhibition of K Ca as well as significantly increasing the input resistance of the cell. The agonists 1-(1-naphthyl)piperazine and buspirone (both serotonin receptor 1A agonists) were similarly effective in reducing K Ca . Outward current was unaffected by application of phenylbiguanide, a serotonin receptor 3 agonist, though current was affected by subsequent application of (±)-2-dipropylamino-8-hydroxy-1,2,3,4-tetrahydronaphthalene. Two agonists—N-(3-trifluoromethylphenyl)piperazine and (±)-2-dipropylamino-8-hydroxy-1,2,3,4-tetrahydronaphthalene—were also tested on voltage-dependent sodium currents; both were effective and reversible in reducing its magnitude at a variety of applied potentials. These data are consistent with the notion that serotonin effects in rat taste receptor cells are mediated by serotonin 1A receptors, though other receptor subtypes may be additionally expressed. Serotonin may affect the taste cell electrical properties during active stimulation in a paracrine fashion.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002320001014
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  • 5
    Digitale Medien
    Digitale Medien
    Peptide growth factor phytosulfokine-α contributes to the pollen population effect (2000)
    Springer
    Planta 211 (2000), S. 752-755 
    Details
    ISSN: 1432-2048
    Schlagwort(e): Key words:Nicotiana (pollen germination) – Phytosulfokine-α– Sulfated peptide – Peptide growth factor – Pollen germination – Pollen population effect
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract. Density-dependent pollen germination and tube growth in vitro is a well-documented phenomenon, termed the pollen population effect, but far less is known about its molecular basis. We present evidence to support phytosulfokine-α [Y(SO3H)IY(SO3H)TQ; PSK-α] as a native bioactive factor contributing to this effect. Mature pollen grains of Nicotiana tabacum L. var.macrophylla were incubated in liquid medium for 2 h. Pollen germination frequency increased in a density-dependent manner from 625 to 46,000 grains/ml. Conditioned medium, obtained from the medium of pollen cultured at a density of 10,000 pollen grains/ml for 12 h, promoted the germination of pollen cultured at a low density (625 grains/ml). A rabbit antiserum against PSK-α specifically inhibited the promotive effect of conditioned medium. Quantification by enzyme-linked immunosorbent assay showed that the conditioned medium contained 0.4 nM of PSK-α. Exogenous PSK-α also stimulated pollen germination in the low-density culture. These results indicate that PSK-α is an important regulator involved in the pollen population effect.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s004250000370
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  • 6
    Digitale Medien
    Digitale Medien
    Effects of Rare Earth Metal Ions and Their EDTA Complexes on Antioxidant Enzymes of Fish Liver (2000)
    Springer
    Bulletin of environmental contamination and toxicology 65 (2000), S. 357-365 
    Details
    ISSN: 1432-0800
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik , Medizin
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s0012800136
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  • 7
    Digitale Medien
    Digitale Medien
    Determination of marker constituents in radix Glycyrrhizae and radix Notoginseng by near infrared spectroscopy (2000)
    Springer
    Fresenius' journal of analytical chemistry 367 (2000), S. 491-496 
    Details
    ISSN: 1432-1130
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract High-performance liquid chromatographic (HPLC) methods were developed for the determination of glycyrrhizin in radix Glycyrrhizae and ginsenosides Rb1, Rb2, Rc, Rd, Re, Rf and Rg1 in radix Notoginseng. These methods were used as reference methods for near-infrared (NIR) spectroscopy. Spectroscopic calibrations were developed for the determination of glycyrrhizin, the total content of ginsenosides and the individual major ginsenosides Rb1, Rd, Re and Rg1. Standard errors of cross validation (SECV) were 1.22 mg g–1 for glycyrrhizin (concentration range 21.3–34.1 mg g–1) and 0.99 mg g–1 for the sum of ginsenosides (concentration range 55.3–¶71.1 mg g–1). The corresponding coefficients of determination (R2) were 0.94 and 0.98, respectively. The SECVs were generally less than a factor of 2.5 of the repeatability standard deviation of the HPLC methods.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002160000356
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  • 8
    Digitale Medien
    Digitale Medien
    QTL mapping for the paste viscosity characteristics in rice (Oryza sativa L.) (2000)
    Springer
    Theoretical and applied genetics 100 (2000), S. 280-284 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Key words Rice ; Paste viscosity characteristics ; Rapid Visco Analyser (RVA) ; Quantitative trait locus (QTL) ; Doubled haploid (DH) population
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract  In order to understand the genetic basis of the paste viscosity characteristics (RVA profile, which is tested on the Rapid Visco Analyser) of the rice grain, we mapped QTLs for RVA profile parameters using a DH population derived from a cross between an indica variety, Zai-Ye-Qing 8 (ZYQ8), and a japonica variety, Jing-Xi 17 (JX17). Evidence of genotype-by-environment interaction was found by comparing the mapped QTLs between two locations, Hainan (HN) and Hangzhou (HZ). A total of 20 QTLs for six parameters of the RVA profiles were identified at least one location. Only the waxy locus (wx) located on chromosome 6 was detected significantly at both environments for five traits, i.e. hot paste viscosity (HPV), cool paste viscosity (CPV), breakdown viscosity (BDV), consistency viscosity (CSV) and setback viscosity (SBV). This locus explained 19.5%–63.7% of the total variations at both environments, suggesting that the RVA profiles were mainly controlled by the wx gene. HPV, CPV, BDV, CSV and SBV were also controlled by other QTLs whose effects on the respective parameter were detected only in one environment, while for the peak viscosity (PKV), only 2 QTLs, 1 at HN,the other at HZ, were identified. These results indicate that RVA profiles are obviously affected by environment.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s001220050037
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  • 9
    Digitale Medien
    Digitale Medien
    Physical aging of epoxy resin blended with poly(ether sulfone): Effect of poly(ether sulfone) molecular weight (2000)
    Springer
    Journal of polymer research 7 (2000), S. 257-266 
    Details
    ISSN: 1572-8935
    Schlagwort(e): Poly(ether sulfone) ; Epoxy resin ; Physical aging ; DSC
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: Abstract The physical aging process of 4-4′-diaminodiphenylsulfone (DDS) cured diglycidyl ether bisphenol-A (DGEBA) blended with various molecular weights of poly(ether sulfone) (PES; Mn = 28,600, 10,600, and 6,137) was studied by DSC. For DGEBA/DDS system blended with a low MW PES-3 (Mn = 6,137), no phase separation of the polymer blend and only one enthalpic relaxation process due to physical aging was observed. Since the high MW PES-1 (Mn = 28,600) had a Tg close to that of fully cured DGEBA/DDS, the fully cured DGEBA/DDS/PES-1 blend had a broader glass transition than a neat DGEBA/DDS system. However, the DSC results showed two enthalpic relaxation processes due to the physical aging of PES-rich and cured epoxy-rich phases as the material was aged at 155 °C (30 °C below Tg). Since the Tgs of PES-1-rich and epoxy-rich phases overlapped with each other, the enthalpic relaxation processes corresponding to each phase coupled to each other in the earlier stage of physical aging. The medium MW PES-2 (Mn = 10,600) has a much lower Tg than that of fully cured DGEBA/DDS, two well separated Tgs were observed for the cured DGEBA/DDS/PES-2 blend, indicating the cured epoxy was immiscible with PES. Aging the polymer blend at 155 °C (24 °C below Tg1 of the PES-2-rich phase and 53 °C below Tg2 of the epoxy-rich phase) produced two well separated relaxation processes due to PES-2-rich and epoxy-rich phases. The experimental results suggested that aging the polymer blend at a suitable temperature would improve the phase separation between PES-1-rich and epoxy-rich phases.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s10965-006-0128-6
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  • 10
    Digitale Medien
    Digitale Medien
    The short-time critical behaviour of the Ginzburg-Landau model with long-range interaction (2000)
    Springer
    The European physical journal 18 (2000), S. 289-296 
    Details
    ISSN: 1434-6036
    Schlagwort(e): PACS. 64.60.Ht Dynamic critical phenomena - 05.70.Ln Nonequilibrium and irreversible thermodynamics
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract: The renormalisation group approach is applied to the study of the short-time critical behaviour of the d-dimensional Ginzburg-Landau model with long-range interaction of the form in momentum space. Firstly the system is quenched from a high temperature to the critical temperature and then relaxes to equilibrium within the model A dynamics. The asymptotic scaling laws and the initial slip exponents and of the order parameter and the response function respectively, are calculated to the second order in .
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s100510070060
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