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  • 1
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    Seafloor seismic stations perform well in study (1999)
    In:  Eos, Trans., Am. Geophys. Un., Würzburg, Pergamon, vol. 80, no. 49, pp. 529, pp. B05S01, (ISSN: 1340-4202)
    Details
    Publication Date: 1999
    Keywords: Seismology ; OBS ; Instruments ; ISN ; OSN ; Seismic networks ; Broad-band
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Generating solitons by phase engineering of a bose-einstein condensate (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-30
    Description: Quantum phase engineering is demonstrated with two techniques that allow the spatial phase distribution of a Bose-Einstein condensate (BEC) to be written and read out. A quantum state was designed and produced by optically imprinting a phase pattern onto a BEC of sodium atoms, and matter-wave interferometry with spatially resolved imaging was used to analyze the resultant phase distribution. An appropriate phase imprint created solitons, the first experimental realization of this nonlinear phenomenon in a BEC. The subsequent evolution of these excitations was investigated both experimentally and theoretically.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Denschlag -- Simsarian -- Feder -- Clark -- Collins -- Cubizolles -- Deng -- Hagley -- Helmerson -- Reinhardt -- Rolston -- Schneider -- Phillips -- New York, N.Y. -- Science. 2000 Jan 7;287(5450):97-101.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Institute of Standards and Technology (NIST), Gaithersburg, MD 20899, USA. University of Oxford, Parks Road, Oxford OX1 3PU, UK. Theoretical Division, Mail Stop B212, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. Ecole Normale Supe.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10615056" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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    PAPER CURRENT
  • 3
    Electronic Resource
    Electronic Resource
    Photoconductive spectroscopy of diamond grown by chemical vapor deposition (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 3879-3884 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The photoconductivity of diamonds grown by chemical vapor deposition has been studied in the near infrared and visible spectral regions. The dominant photoconductive response has a threshold at approximately 1.5 eV. There is additional sharp structure in the region extending 165 meV to higher energy from the threshold, where 165 meV is the energy of the longitudinal optical (LO) phonon in diamond. It has also been found that there are minima in the photoconductivity spectrum at energies which are multiples of the energy of the LO phonon from the threshold energy. These minima have been associated with the decay of carriers to the bottom of the band by rapid emission of LO phonons. The optical absorption spectra of these diamonds show previously undocumented, sharp lines between 1.3 and 1.5 eV. These features are due to absorption to excited states of the same defect which is giving rise to the photoconductivity threshold at 1.5 eV. The sharp structure in the one-phonon region of the photoconductivity spectrum has been associated with capture to these excited states by the emission of LO phonons. Similar structure in the same region of the absorption spectrum has been attributed to Fano resonances—interference effects caused by the interaction of bound states with a continuum of states © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358566
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  • 4
    Electronic Resource
    Electronic Resource
    The role of food availability in regulating reproductive development in female golden perch (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 55 (1999), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: At a time of the year when female golden perch Macquaria ambigua are not normally reproductively active, they were either fed daily to satiety (Fed), starved for 150 days (S150), or starved for 150 days then fed to satiety for 30 or 60 days (S150/F30 or S150/F60). Fish showed rapid growth and increased food conversion efficiency upon re-feeding relative to Fed animals. The hepatosomatic indices were not significantly different between Fed, S150/F30 and S150/F60 groups, but were significantly reduced in S150 animals. The gonadosomatic indices (IG) for both Fed and S150 animals were not significantly different. However, the IG values for S150/F30 and S150/F60 animals of 6·74±1·22 and 7·84±1·12 were significantly elevated relative to Fed animals and approach those described for wild mature M. ambigua. Oocyte development in Fed and S150 animals did not proceed past the cortical alveoli or perinucleolar stages, respectively, but oocytes in both S150/F30 and S150/F60 animals had undergone vitellogenesis and were close to being mature. The concentration of oestradiol and testosterone in the plasma of S150/F30 and S150/F60 animals increased in accordance with the proposed role of these hormones in teleost reproductive cycles. The reproductive response of M. ambigua to starvation and re-feeding is well suited to reproductive success in temperate Australian rivers where food availability is unpredictable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1999.tb00659.x
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  • 5
    Electronic Resource
    Electronic Resource
    The regulation of endogeneous energy stores during starvation and refeeding in the somatic tissues of the golden perch (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 47 (1995), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Adult golden perch Macquaria ambigua were fed to satiety, starved for up to 210 days, or starved for 150 days then fed to satiety for 60 days to investigate the utilization of energy stores in response to food deprivation and re-feeding. Golden perch sequentially mobilize energy from hepatic tissue, extra-hepatic lipid, and finally muscle components in response to food deprivation. The relative size of the liver was significantly reduced by 30 days after the onset of food deprivation due to the simultaneous mobilization of lipid, protein and glycogen reserves. These stores were renewed rapidly within 30 days by satiety feeding. Mobilization of lipid stores in perivisceral fat bodies occurred between 30 and 60 days of food deprivation. These deposits were also renewed upon re-feeding, although not as rapidly as liver reserves. The glycogen content of the epaxial muscle was reduced by the 60th day of food deprivation but subsequently increased indicating the mobilization of other energy reserves. The concentration of muscle lipid decreased after 90 days of food deprivation. The only significant response in body composition observed in the fish fed to satiety throughout the study was an increase in the relative size of the perivisceral fat bodies. The results of this study suggest that golden perch are well adapted to cope with extended periods of food deprivation, storing energy as perivisceral fat when food is readily available and having a clearly sequential process for mobilizing energy when food is scarce which largely protects the integrity of the musculature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1995.tb06024.x
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  • 6
    Electronic Resource
    Electronic Resource
    The influence of changes in food availability on the activities of key degradative and metabolic enzymes in the liver and epaxial muscle of the golden perch (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 50 (1997), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: This study investigated the influence of feeding frequency on the activities of important degradative enzymes and potentially rate-limiting enzymes in glycolysis and gluconeogenesis in the liver and white epaxial muscle of Macquaria ambigua. Adult animals were either fed daily to satiety (fed), deprived of food for up to 180 days (starved), or starved for 150 days then fed daily to satiety for 30 days (starved/fed). The activities of lipolytic, glycogenolytic and glycolytic enzymes in the livers of starved fish were maintained as long as liver energy stores were available, but became significantly reduced following their exhaustion indicating a decline in metabolism in response to prolonged starvation. The response of epaxial muscle metabolism to changes in food availability was different to that of the liver, as no significant change in the activities of muscle lipolytic or glycogenolytic enzymes were observed in response to starvation. Muscle tissue metabolism was reduced after 60–90 days of starvation, but then returned to prestarvation levels.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1997.tb01644.x
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  • 7
    Electronic Resource
    Electronic Resource
    Fifty new microsatellite loci for the wheat genetic map (1998)
    Springer
    Theoretical and applied genetics 97 (1998), S. 946-949 
    Details
    ISSN: 1432-2242
    Keywords: Key words Wheat ; Microsatellite markers ; Genetic map
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Hexaploid bread wheat (Triticum aestivum) has low levels of RFLP. Simple sequence repeats, however, show high levels of polymorphism and are therefore especially useful in intervarietal breeding applications. We present 53 newly mapped microsatellite loci for the wheat genetic map, 41 primary loci and 12 additional loci from these same primer pairs. Markers have been accredited with a quality score on a scale of 1–5 which describes the complexity of the amplification product profile from each primer pair.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050975
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  • 8
    Electronic Resource
    Electronic Resource
    Suppression of queen rearing in European and Africanized honey beesApis mellifera L. by synthetic queen mandibular gland pheromone (1995)
    Springer
    Insectes sociaux 42 (1995), S. 113-121 
    Details
    ISSN: 1420-9098
    Keywords: Apis mellifera ; queen pheromone ; queen rearing ; monogyny ; Africanized
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Queen rearing is suppressed in honey bees (Apis mellifera L.) by pheromones, particularly the queen's mandibular gland pheromone. In this study we compared this pheromonally-based inhibition between temperate and tropically-evolved honey bees. Colonies of European and Africanized bees were exposed to synthetic queen mandibular gland pheromone (QMP) for ten days following removal of resident queens, and their queen rearing responses were examined. Queen rearing was suppressed similarly in both European and Africanized honey bees with the addition of synthetic QMP, indicating that QMP acts on workers of both races in a comparable fashion. QMP completely suppressed queen cell production for two days, but by day six, cells containing queen larvae were present in all treated colonies, indicating that other signals play a role in the suppression of queen rearing. In queenless control colonies not treated with QMP, Africanized bees reared 30% fewer queens than Europeans, possibly due to racial differences in response to feedback from developing queens and/or their cells. Queen development rate was faster in Africanized colonies, or they selected older larvae to initiate cells, as only 1 % of queen cells were unsealed after 10 days compared with 12% unsealed cells in European colonies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01242447
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  • 9
    Electronic Resource
    Electronic Resource
    Laboratory evaluation of the freshwater prawn, Macrobrachium borellii, as a predator of mosquito larvae (1998)
    Springer
    Aquatic sciences 60 (1998), S. 22-27 
    Details
    ISSN: 1420-9055
    Keywords: Key words: Mosquito larvae, prawns, natural enemies, predation, Culex, Macrobrachium.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract: Mortality of Culex pipiens s.l. mosquito larvae due to a natural enemy, Macrobrachium borellii, was studied under laboratory conditions. Prawns were divided into three groups (Cephalothorax length: ≤5 mm; 5-15 mm and ≥15 mm). The mosquito larvae were put together with the prawns in various ratios for per capita predation after 24 hs and 72 hs. Predation on C. pipiens s.l. increased with the predator size and the rates were constant in each group. Although predation of C. pipiens in laboratory trials alone is insufficient to prove that M. borellii controls mosquito larvae in the field, results suggest that this prawn may be an important natural enemy, being a possible biocontrol agent for its abundance in lentic environment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00001312
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  • 10
    Electronic Resource
    Electronic Resource
    Isolation and characterisation of microsatellites from hexaploid bread wheat (1997)
    Springer
    Theoretical and applied genetics 94 (1997), S. 557-563 
    Details
    ISSN: 1432-2242
    Keywords: Key words Wheat ; PCR ; Microsatellite ; Simple sequence repeats
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The development of large panels of simple-to-analyse genetic markers for tagging agronomically important genes and diversity studies in hexaploid bread wheat is an important goal in applied cereal genetic research. We have isolated and sequenced over 200 clones containing microsatellites from the wheat genome and have tested 153 primer pairs for genetic polymorphism using a panel of ten wheat varieties, including the parents of our main mapping cross. A subset comprising 49 primer pairs detects 76 loci, of which 74 can be unequivocably allocated to one of the wheat chromosomes. A relatively low frequency of the loci detected are from the D genome, and these loci show less polymorphism than those from the A and B genomes. Generally, the microsatellites show high levels of genetic polymorphism and an average of 3.5 alleles per locus with an average polymorphism information content (PIC), value of 0.51. The observed levels of polymorphism are positively correlated with the length of the microsatellite repeats. A high proportion, approximately two-thirds, of primer pairs designed to detect simple sequence repeat (SSR) variation in wheat do not generate the expected amplification products and, more significantly, often generate unresolvable PCR products. In general, our results agree closely with those obtained from other recent studies using microsatellites in plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050451
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