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  • 1
    Electronic Resource
    Electronic Resource
    High-resolution studies of BaD molecule in the ultraviolet region (1991)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 13 (1991), S. 1021-1029 
    Details
    ISSN: 0392-6737
    Keywords: Vibrational-rotational analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary We report a new high-resolution absorption spectrum of BaD in the wavelength region (3580÷3760) Å using the third order of a 21 ft. concave grating spectrograph. Two new electronic states of BaD are reported named asK 2∃-X 2 ∃ at 3750 Å andL 2 II-X 2 ∃ at 3680 Å, respectively. The (0,0),(1,1),(1,0) and (2,1) bands of theL 2-II-X 2∃ state and (0,0) and (1,0) bands of theK 2∃-X 2∃ state have been observed. Vibrational and rotational analysis of these newly observed bands have been carried out and the corresponding effective vibrational and rotational constants are reported. TheK 2∃ andL 2 II states are tentatively assigned as originating from the 7p atomic state of barium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02457164
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  • 2
    Electronic Resource
    Electronic Resource
    An ultraviolet system of Na2 at 2700 Å (1991)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 13 (1991), S. 455-458 
    Details
    ISSN: 0392-6737
    Keywords: Molecular spectra, grouped by wavelength ranges
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary The spectrum of Na2 from 2600 Å to 2750 Å has been recorded in absorption in the second order of a 3.4 m Ebert spectrograph with a reciprocal dispersion of 2.6 Å/mm. The vibrational structure appears to the higher-energy side of theE-X system extending to about 2600 Å. This system is namedF-X system. The vibrational analysis is performed and the molecular constants are evaluated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02452129
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  • 3
    Electronic Resource
    Electronic Resource
    Molecular and agronomic characterization of wheat-Agropyron intermedium recombinant chromosomes (2000)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 119 (2000), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Thirty-six wheat-Agropyron intermedium (host) Beauv. [Syn. Trichopyrum intermedium (host) A. Love, Elytrigia intermedia (host) Nevski, Thinopyrum intermedium (host) Barkworth and Dewey] 7A/7Ai-1 recombinant chromosomes were characterized using DNA markers. Analysis of recombinant chromosomes using 15 restriction fragment length polymorphism probes identified the homoeologous crossover products that had varying length of A. intermedium chromatin introgressed onto chromosome 7A of common wheat. The linear order of the probe loci was established along the lengths of the chromosomes. The short arm recombinants that had A. intermedium chromatin distal to the locus Xpsr108 and proximal to the locus Xpsr119 were resistant to wheat stem rust, indicating that the rust resistance gene (Sr44) was located on the distal part of chromosome arm 4Ai-1s. The barley yellow dwarf virus (BYDV) resistance gene reported to be present on the long arm of chromosome 7Ai-1 was found to be ineffective against the BYDV serotype used in the present study.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1439-0523.2000.00440.x
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  • 4
    Electronic Resource
    Electronic Resource
    Effects of Season, Pinealectomy, and Blinding, Alone and in Combination, on Hypothalamic Monoaminergic Activity in the Teleost Channa punctatus (Bloch) (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of pineal research 8 (1990), S. 0 
    Details
    ISSN: 1600-079X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In Channa punctatus, day-night variations in hypothalamic 5-HT (serotonin) and monoamine oxidase (MAO) activity were noticed in preparatory but not other phases (prespawning and postspawning) of the annual reproductive cycle. Hypothalamic MAO, 5-HT, and norepinephrine (NE) activity was found to be high in the prespawning phase and low in the postspawning phase. Dopamine (DA) activity, on the other hand, was high in the postspawning season and low in the prespawning phase. Pinealectomy caused season-dependent effects on hypothalamic monoaminergic activity, with a significant increase in serotonergic activity and a significant reduction in MAO activity at midscotophase during the preparatory phase (March) but not in the prespawning (May-June) or postspawning (September) phases. Hypothalamic catecholaminergic (CA) activity was not influenced by pinealectomy during any of the seasons. To determine whether or not the photoperiodic influences on daily variations of 5-HT and MAO in the preparatory phase are mediated via pineal and/or lateral eyes, fish were pinealectomized and/or blinded in January, when there is no rhythm, and sacrificed in February, when a day-night variation normally sets in. The day-night difference in 5-HT content and activity and MAO activity was not abolished by pinealectomy or blinding alone; but the combination (pinealectomy + blinding) obliterated the daily variation only in 5-HT content and in MAO activity. However, pinealectomy and blinding, alone or in combination, caused a significant elevation of 5-HT activity (not its level) and a significant decrease in MAO activity at midscotophase, with the combination having an additive effect. Hypothalamic CA content or activity was not affected by these regimes. The results show that photoperiodic influence on the daily pattern of 5-HT and MAO activity is mediated through and by the interaction of the pineal and lateral eyes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-079X.1990.tb00687.x
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  • 5
    Electronic Resource
    Electronic Resource
    Development of PCR markers for the wheat leaf rust resistance gene Lr47 (2000)
    Springer
    Theoretical and applied genetics 100 (2000), S. 1137-1143 
    Details
    ISSN: 1432-2242
    Keywords: Key words Wheat ; Triticum speltoides ; Marker-assisted selection ; Leaf rust ; Resistance gene ; PCR markers ; Sucrose synthase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The leaf rust resistance gene Lr47 confers resistance to a wide spectrum of leaf rust strains. This gene was recently transferred from chromosome 7 S of Triticum speltoides to chromosome 7 A of hexaploid wheat Triticum aestivum. To facilitate the transfer of Lr47 to commercial varieties, the completely linked restriction fragment length polymorphism (RFLP) locus Xabc465 was converted into a PCR-based marker. Barley clone ABC465 is orthologous to the type-I wheat sucrose synthase gene and primers were designed for the conserved regions between the two sequences. These conserved primers were used to amplify, clone and sequence different alleles from T. speltoides and T. aestivum. This sequence information was then used to identify the T. speltoides sequence, detect allele-specific mutations, and design specific primers. Cosegregation of the PCR product of these primers and the T. speltoides chromosome segment was confirmed in four backcross-populations. To complement this dominant marker, a cleavage amplified polymorphic sequence (CAPS) was developed for the 7 A allele of Xabc465. This CAPS marker is useful to select homozygous Lr47 plants from F2or backcross-F2 segregating populations, and in combination with the T. speltoides-specific primers is expected to facilitate the deployment of Lr47 in new bread wheat varieties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220051397
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  • 6
    Electronic Resource
    Electronic Resource
    Comparisons of recombination frequencies in hybrids involving telocentric and bibrachial wheat chromosomes (2000)
    Springer
    Theoretical and applied genetics 100 (2000), S. 308-314 
    Details
    ISSN: 1432-2242
    Keywords: Key words Triticum aestivum ; Recombination ; Centromeric region ; Telosomes ; Gametic selection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Telosomic stocks have been extensively used to map genes to chromosome arms and to determine gene-to-centromere genetic distances. It has been suggested that if a chromosome arm is present as a telosome, recombination frequencies will be drastically reduced in the centromeric region. However, previous studies have not considered the bias in recombination estimates due to selection against aneuploid gametes produced by failure of pairing at the first meiotic division. Formulas are derived here for adjusting recombination estimates for this bias. Adjusted recombination frequencies between markers located on both sides of the centromeres are analyzed in three different pairs of wheat (Triticum aestivum) isogenic segregating populations involving bibrachial and telocentric chromosomes. Recombination frequencies estimated from crosses involving telocentric chromosomes were not significantly different from recombination frequencies estimated from isogenic crosses involving bibrachial chromosomes. The implications of the present findings for karyotype evolution, and specifically for Robertsonian fissions and fusions, are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050040
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  • 7
    Electronic Resource
    Electronic Resource
    Development of PCR markers for wheat leaf rust resistance gene Lr47 (2000)
    Springer
    Theoretical and applied genetics 101 (2000), S. 625-631 
    Details
    ISSN: 1432-2242
    Keywords: Keywords Wheat ; Triticum speltoides ; Marker-assisted selection ; Leaf rust ; Resistance gene ; PCR markers ; Sucrose synthase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The leaf rust resistance gene Lr47 confers resistance to a wide spectrum of leaf rust strains. This gene was recently transferred from chromosome 7S of Triticum speltoides to chromosome 7A of hexaploid wheat Triticum aestivum. To facilitate the transfer of Lr47 to commercial varieties, the completely linked restriction fragment length polymorphism (RFLP) locus Xabc465 was converted into a PCR-based marker. Barley clone ABC465 is orthologous to the type-I wheat sucrose synthase gene and primers were designed for the conserved regions between the two sequences. These conserved primers were used to amplify, clone and sequence different alleles from T. speltoides and T. aestivum. This sequence information was used to identify the T. speltoides sequence, detect allele-specific mutations, and design specific primers. Cosegregation of the PCR product of these primers and the T. speltoides chromosome segment was confirmed in four backcross-populations. To complement this dominant marker, a cleavage amplified polymorphic sequence (CAPS) was developed for the 7A allele of Xabc465. This CAPS marker is useful to select homozygous Lr47 plants from F2 or backcross-F2 segregating populations, and in combination with the T- speltoides specific primers is expected to facilitate the deployment of Lr47 in new bread wheat varieties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220051524
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  • 8
    Electronic Resource
    Electronic Resource
    Diurnal variations in hypothalamic monoamine levels in the teleostChanna punctatus (bloch) in response to melatonin under two photothermal conditions (1988)
    Springer
    Fish physiology and biochemistry 5 (1988), S. 187-190 
    Details
    ISSN: 1573-5168
    Keywords: melatonin ; photoperiod ; temperature ; diurnal variation ; dopamine ; noradrenaline ; 5-hydroxytryptamine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Hypothalamic dopamine (DA), noradrenaline (NA) and 5-hydroxytryptamine (5-HT) levels exhibited marked day-night variations under ambient photoperiod and temperature (12L∶12D; 17±1°C) with peak values at mid-light phase. The 16L∶8D; 22±1°C treatment reversed the diurnal rhythm of 5-HT, but not that of DA and NA. However, there was an overall increase in the levels of the catecholamines on exposure to the long photoperiod and high temperature. The administration of melatonin in the fish held on 16L∶8D; 22±1°C regime restored the 5-HT rhythm to that of the 12L∶12D; 17±1°C control group, but with elevated mid-photophase value. However, there was no effect of the indole treatment on the 5-HT rhythm under the 12L∶12D; 17±1°C regime. Melatonin causes a significant reduction of NA level in both the groups, while DA level did not change in either group.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01874795
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  • 9
    Electronic Resource
    Electronic Resource
    Differential effects of photoperiod and temperature on hypothalamic monoaminergic activity in the teleost Channa punctatus (Bloch) (1990)
    Springer
    Fish physiology and biochemistry 8 (1990), S. 291-297 
    Details
    ISSN: 1573-5168
    Keywords: photoperiod ; temperature ; hypothalamus ; norepinephrine ; dopamine ; 5-hydroxytryptamine ; MAO
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In Channa punctatus maintained under ambient photothermal conditions (10.5L:13.5D; 13 ± 2°C) in the postspawning season, hypothalamic dopamine (DA) and norepinephrine (NE) content varied diurnally, but serotonin (5-HT) and monoamine oxidase (MAO) did not. Exposure of the fish to high temperature (25 ± 2°C), with or without altering the photopheriod, increased the NE and DA content, and NE turnover but decreased DA turnover. Increasing the photoperiod (16L:8D) alone had no significant effect on catecholaminergic (CA) content or activity. When the fish were exposed to long photoperiod, with or without altering the temperature, a day-night variation in 5-HT content and activity was induced in the postspawning season. An increase in temperature alone had no significant effect on 5-HT content or activity. Hypothalamic MAO activity was elevated in fish exposed to high temperature alone, or in combination with long photoperiod, but was not affected significantly by long photoperiod treatment. These results indicate that CA activity is influenced largely by ambient high temperature, whereas serotonergic activity is controlled primarily by photoperiod, with high temperature having an additive effect. MAO activity seems to be influenced by both temperature and photoperiod in this species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00003424
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  • 10
    Electronic Resource
    Electronic Resource
    Separation ofPodophyllum lignans by micellar electrokinetic capillary chromatography (MECC) (1999)
    Springer
    Chromatographia 49 (1999), S. 552-556 
    Details
    ISSN: 1612-1112
    Keywords: Micellar electrokinetic chromatography ; Lignans ; Podophyllum peltatum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Separation of the mainPodophyllum lignans by MECC has been achieved using a phosphate-borate buffer system with the pH of 7.25, containing 25 mM SDS and 15% methanol. Optimum temperature and voltage were found to be 35°C and 20kV, respectively, UV-detection was performed at 220 nm. The method was successfully used to analyse different samples ofPodophyllum peltatum collected in the southern USA, and showed great qualitative and quantitative variations among these populations. The quantitative MECC results for podophyllotoxin were in good agreement to those obtained by HPLC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02467758
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