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  • 1
    Electronic Resource
    Electronic Resource
    Distribution of steroidal glycoalkaloids in reciprocal grafts ofSolanum tuberosum L. andLycopersion esculentum Mill (1982)
    Springer
    Cellular and molecular life sciences 38 (1982), S. 460-462 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary TLC analyses of steroidal glycoalkaloids of the scion and stock of reciprocally-grafted potato and tomato plants and tracer studies involving administration of [14C]-labeled alkaloid precursors to scion and stock suggest that alkaloid transport between root and shoot does not take place in these species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01952637
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  • 2
    Electronic Resource
    Electronic Resource
    Biodiversity in Littorina species (Mollusca: Gastropoda): a physiological approach using heat-coma (2000)
    Springer
    Marine biology 137 (2000), S. 559-565 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The upper critical thermal limits were measured as heat-coma temperatures in Littorina species as a tool for examining physiological diversity. Thermal tolerance was found to be stable within a population, but extensive variation occurred between populations and species. All species examined displayed heat-coma values of ∼30 °C and did not show a positive correlation with shore height. Eulittoral-fringe species tended to have higher coma temperatures than eulittoral species. Coma temperatures varied both seasonally and geographically. Lethal thermal limits were also investigated; these were ∼10 C° higher than coma temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002270000368
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  • 3
    Electronic Resource
    Electronic Resource
    The nature of heat coma in Littorina littorea (Mollusca: Gastropoda) (2000)
    Springer
    Marine biology 137 (2000), S. 447-451 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The nature of heat coma was examined in the edible periwinkle Littorina littorea (L.). Duration of acclimation did not influence heat-coma temperature at 12 °C, although other acclimation temperatures were important in influencing thermal tolerance, with positive shifts in coma temperature observed in response to elevated temperatures. Previous thermal history also influenced heat-coma temperatures. Individuals subjected to repeat heat-coma events on a daily basis showed significant declines (P 〈 0.05) in coma-temperature; in contrast individuals exposed to repeat heat-coma events on a weekly basis showed no decline in thermal tolerance. Size-effects occurred at selected sites, where decreased heat-coma temperatures were recorded in large individuals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002270000367
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  • 4
    Electronic Resource
    Electronic Resource
    Relations betweenβ X∖X and a certain subspace of λX (1977)
    Springer
    Mathematische Zeitschrift 156 (1977), S. 187-203 
    Details
    ISSN: 1432-1823
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01178763
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  • 5
    Electronic Resource
    Electronic Resource
    Representing countable groups by homeomorphism groups in Hilbert space (1982)
    Springer
    Mathematische Annalen 259 (1982), S. 321-329 
    Details
    ISSN: 1432-1807
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01456944
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  • 6
    Electronic Resource
    Electronic Resource
    Partial Sequence of the Mitochondrial Genome of Littorina saxatilis: Relevance to Gastropod Phylogenetics (1999)
    Springer
    Journal of molecular evolution 48 (1999), S. 348-359 
    Details
    ISSN: 1432-1432
    Keywords: Key words:Littorina saxatilis— Mitochondrial genome — Gastropod phylogenetics — Gene order — Mollusca
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. A 8022 base pair fragment from the mitochondrial DNA of the prosobranch gastropod Littorina saxatilis has been sequenced and shown to contain the complete genes for 12 transfer RNAs and five protein genes (CoII, ATPase 6, ATPase 8, ND1, ND6), two partial protein genes (CoI and cyt b), and two ribosomal RNAs (small and large subunits). The order of these constituent genes differs from those of other molluscan mitochondrial gene arrangements. Only a single rearrangement involving a block of protein coding genes and three tRNA translocations are necessary to produce identical gene orders between L. saxatilis and K. tunicata. However, only one gene boundary is shared between the L. saxatilis gene order and that of the pulmonate gastropod Cepaea nemoralis. This extends the observation that there is little conservation of mitochrondrial gene order amongst the Mollusca and suggests that radical mitochondrial DNA gene rearrangement has occurred on the branch leading to the pulmonates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00006479
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  • 7
    Electronic Resource
    Electronic Resource
    Ventilatory muscle activity in restrained and free-swimming dragonfly larvae (Odonata: Anisoptera) (1975)
    Springer
    Journal of comparative physiology 96 (1975), S. 37-52 
    Details
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The roles of certain abdominal muscles in ventilatory behaviour are discussed and illustrated with records of muscular activity obtained mainly from free-swimming animals. The following muscles are shown to be active during normal ventilation (V n): respiratory and anterior dorso-ventrals (RDV and ADV), longitudinal tergal (LT), diaphragm, sub-intestinal and adductors of the anal appendages (VADP). The posterior dorso-ventral, lateral primary longitudinal sterno-pleural, and dorso-ventral oblique muscles were found to be inactive duringV n. TheRDV, ADV, LT andVADP are also active during ventilatory movements other thanV n.RDV activity is shown to be more variable in the free-swimming animal than recordings from dissected and restrained preparations previously suggested. Activity in theADV duringV n shows a reciprocal relationship with that in theRDV. Postulated control elements in larval ventilation are found to parallel many described in other ventilatory systems and motor rhythms generally.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00611961
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  • 8
    Electronic Resource
    Electronic Resource
    Jet-propulsion in anisopteran dragonfly larvae (1975)
    Springer
    Journal of comparative physiology 97 (1975), S. 329-338 
    Details
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Jet-propulsion in dragonfly larvae is achieved by the rapid ejection of water from a specialised rectal chamber via the anus, at a frequency of up to 2.2 cycles/s. Movement, forward thrust and muscular activity have been recorded in restrained and free-swimming larvae. Forward thrusts of up to 1.5 g wt result from the expiratory phases of cycles lasting 0.1 to 0.4 s. Swimming velocities are in the order of 10 cm/s. The following muscles are shown to be active during expiratory phases of jetting: anterior, posterior and respiratory dorso-ventrals; primary and secondary longitudinal tergals; lateral primary longitudinal sternopleural; dorso-ventral oblique; ventral adductors of the anal appendages. The sub-intestinal muscle is active during the inspiratory phases of jetting. Activity recorded is compared with that found during normal ventilation. The larval jet-propulsive mechanism is compared with that of certain cephalopods and found to be very effective for the larva's relatively small size.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00631969
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  • 9
    Electronic Resource
    Electronic Resource
    Anisotropy of the magnetic properties of the cuprates Dy2BaCuO5 and Ho2BaCuO5: Magnetic and spectroscopic investigations (1997)
    Springer
    Journal of experimental and theoretical physics 84 (1997), S. 175-182 
    Details
    ISSN: 1090-6509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The magnetization of single crystals of the cuprates Dy2BaCuO5 and Ho2BaCuO5 along different crystallographic directions is measured using a SQUID magnetometer in fields up to 54 kOe. Spectroscopic investigations of the exchange splitting of the levels of Er3+ probe ions in these cuprates are also performed. It is shown that the cuprates investigated are highly anisotropic antiferromagnets, which display quasi-Ising behavior in a magnetic field. The nature of the two spontaneous magnetic phase transitions detected in Dy2BaCuO5 and Ho2BaCuO5 is analyzed. It is shown that the low-temperature transition is due to an increase in rare-earth-copper exchange.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.558265
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  • 10
    Electronic Resource
    Electronic Resource
    Bulk photovoltaic and photorefractive effects in a piezoelectric La3Ga5SiO14: Fe crystal (2000)
    Springer
    Crystallography reports 45 (2000), S. 154-156 
    Details
    ISSN: 1063-7745
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The linear and the circular bulk photovoltaic and photorefractive effects in a piezoelectric La3Ga5SiO14: Fe crystal have been studied. It is shown that the photorefractive effect is induced by generation of the photovoltaic voltage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.171154
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