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  • Springer  (46)
  • National Academy of Sciences  (17)
  • American Institute of Physics (AIP)  (5)
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  • 1
    Electronic Resource
    Electronic Resource
    Lasing operation of chemical oxygen-iodine laser without water-vapor trap (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 1785-1786 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: cw laser action from chemically pumped iodine atoms was achieved without a cold trap to freeze water vapor. An alkaline solution of H2O2 was circulated in a porous pipe generator, which made it possible to cool the solution externally. A lasing operation time of about 100 s with a constant output power of 5 W was obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.339921
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  • 2
    Electronic Resource
    Electronic Resource
    Angular distributions of photofragments generated in the two-photon dissociation of nitrogen dioxide and carbon disulfide (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 4425-4430 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Two-photon dissociation of nitrogen dioxide and carbon disulfide at 308 nm has been studied by means of multiphoton ionization of photofragments. The angular distributions of fragments are well represented by a form of 1+β2P2(cos θ)+β4P4(cos θ). Because the intermediate state of NO2 (2B2) generated by the first one-photon process is dissociative, the coefficient β4 for the fourth degree Legendre polynomial is appreciable. The coefficient β4 for CS2 is, however, not appreciable because the intermediate CS2 (1B2) state has a long fluorescence lifetime. The angular distributions not only reveal the symmetry and lifetimes of the two-photon excited states of NO2 and CS2 but also information on the two-photon excitation process of these molecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.452714
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  • 3
    Electronic Resource
    Electronic Resource
    Angular distributions of photofragments from NO2 photodissociation (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 4431-4437 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The angular distributions of recoil of NO molecules from the photodissociation of NO2 near the dissociation threshold of 397.86 nm are presented and analyzed to obtain information about the effect of molecular rotation of parent molecules on the angular distribution. For the one-photon dissociation process, as laser wavelengths become closer to the dissociation threshold, the anisotropy of the angular distribution is reduced. When laser wavelengths become larger than the threshold, NO2 dissociates via two-photon absorption, and the photofragment angular distribution again becomes anisotropic reflecting the second photon absorption.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.452715
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  • 4
    Electronic Resource
    Electronic Resource
    High flux VUV beamline for photochemical processing study at Photon Factory (abstract) : INTERNATIONAL CONFERENCE ON SYNCHROTRON RADIATION INSTRUMENTATION TSUKABA (JAPAN) 29 AUG−2 SEPT 1988 (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 2252-2252 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Recent progress in photochemical processing involving photochemical etching and photochemical vapor deposition are really remarkable and such processes become the most promising candidates as a next-generation VLSI fabrication technology. Thus the study to elucidate the reaction mechanism of the photochemical processing is of both fundamental and technological importance. In order to promote this study, we have designed and constructed a new beamline at Photon Factory (BL 12C). It consists of three major parts; a prefocusing mirror, a multilayer mirror monochromator, and a differential pumping system. A Pt-coated SiC toroidal mirror (Rh:0.539 m, Rv:490 m) is installed in a prefocusing mirror chamber (18.3 m from the source), accepts 5.0-mrad horizontal and 1.0-mrad vertical divergence of the synchrotron radiation, reflects it 3.8° upward, and focuses it onto the middle of the exit arm of the monochromator (32.3 m from the source). A multilayer mirror, which was designed and fabricated by Yamamoto et al., so as to get high reflectance around 100 eV of photon energy (see the preceding paper), is installed in the monochromator, steers SR beam downward, and selects photon energy by changing an incident angle. With this arrangement, a quasimonochromatic and bright beam is obtained in the energy region 80–100 eV. The output flux is expected to be ∼1015 photons/s⋅10% bw with 200-mA ring current.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140785
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  • 5
    Electronic Resource
    Electronic Resource
    Prevention of Osteopenia Induced with a Gonadotropin-Releasing Hormone Agonist in Rats (1999)
    Springer
    Calcified tissue international 65 (1999), S. 152-155 
    Details
    ISSN: 1432-0827
    Keywords: Key words: GnRH agonist — Osteopenia — Estrogen replacement — Bisphosphonate — Vitamin D3 analog.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract. We investigated the effects of conjugated estrogens as an add-back replacement drug, incadronate sodium as a bisphosphonate, and alfacalcidol as a vitamin D3 analog on femoral bone mineral density (BMD) and bone mineral content (BMC) in female rats chronically treated with the gonadotropin-releasing hormone (GnRH) agonist leuprorelin acetate. The chemical castration of the rats by the administration of GnRH agonist for 16 weeks reduced the BMD values to 92.3%, 91.3%, and 93.3% of those of the normal control animals in the whole femur, metaphysis, and diaphysis of the femur, respectively. The BMC value was decreased to 91.0% of that of the normal control animals by the chronic GnRH agonist treatment. However, a simultaneous 8-week administration of conjugated estrogens, bisphosphonate, and vitamin D3 analog markedly augmented the BMC values to 110.3%, 110.1%, and 114.4%, respectively, of those in the rats treated with the GnRH agonist alone. These findings indicate that antiosteoporotic agents could be useful for preventing induced osteopenia under the careful monitoring of biochemical markers of osteoblastic activity or bone resorption and BMD or BMC in patients undergoing GnRH treatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002239900675
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  • 6
    Electronic Resource
    Electronic Resource
    Evidence for the presence of arsenobetaine as a major arsenic compound in the shrimpSergestes lucens (1984)
    Springer
    Cellular and molecular life sciences 40 (1984), S. 1247-1248 
    Details
    ISSN: 1420-9071
    Keywords: Shrimp ; arsenobetaine ; arsenic ; marine ecosystem ; marine food
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The major arsenic compound in the shrimpSergestes lucens was isolated and identified as arsenobetaine (CH3)3A S + CH2COO−. Arsenobetaine accounted for 80% of the total arsenic in the shrimp.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01946656
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  • 7
    Electronic Resource
    Electronic Resource
    A morphological comparison of alates between monogynous and polygynous colonies of Myrmica kotokui in northernmost Japan (1999)
    Springer
    Insectes sociaux 46 (1999), S. 250-255 
    Details
    ISSN: 1420-9098
    Keywords: Key words:Myrmica kotokui, microgyne, macrogyne, polygyny, monogyny, allometry.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary: Social structure and sexual size of two populations of Myrmica kotokui were compared. Most of the colonies were polygynous in one population and monogynous in the other. Mean body size of the queens was larger in the monogynous population than in the polygynous population. Although the polygynous population contained many large queens, their wing length was significantly shorter than that of queens in the monogynous population. Some females in the polygynous population were intermorphic between typical workers and queens, while the females of the monogynous population were clearly divided into worker and queen castes without any intermorphic females. The body size of the males showed a large variation and the mean was not significantly different between the two populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000400050142
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  • 8
    Electronic Resource
    Electronic Resource
    Reproductive strategy in orphaned colonies of Myrmica kotokui Forel, the Japanese species of the M. ruginodis complex (Hymenoptera, Formicidae) (2000)
    Springer
    Insectes sociaux 47 (2000), S. 343-347 
    Details
    ISSN: 1420-9098
    Keywords: Key words:Monogyny, Myrmica ruginodis complex, orphaned colony, reproductive strategy, worker reproduction.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary: The reproductive strategy between queen-right and orphaned colonies of Myrmica kotokui was compared. The ratio of orphaned colonies reached about 30 percent in the field. Although colony size was significantly smaller in orphaned colonies, the mean body size and mean ovariole length of the workers were significantly larger than those in queen-right colonies. The reproductive individuals in orphaned colonies were also significantly larger than those in queen-right colonies. Only 38.5 % of the orphaned colonies, however, contained eggs during the reproductive season, compared to 100 % of the queen-right colonies. This indicates that worker reproduction under natural conditions is relatively low, even in orphaned colonies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00001727
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  • 9
    Electronic Resource
    Electronic Resource
    Venoms from six species of marine fish: lethal and hemolytic activities and their neutralization by commercial stonefish antivenom (1989)
    Springer
    Marine biology 103 (1989), S. 285-289 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A specimen of the stonefish Synanceja verrucosa was captured in Okinawa in March 1988. Live specimens of the scorpionfish Inimicus japonicus were purchased from the Tokyo Central Wholesale Market in November 1988 and those of four species of zebrafish Pterois lumulata, P. volitans, P. antennata and Dendrochirus zebra from an aquarium in December 1988. Crude venoms were extracted from dorsal spines of the six species. All venoms exhibited lethal activity against mice and hemolytic activity specific for rabbit erythrocytes. The lethal activity (or hemolytic activity) of each venom was very unstable to freezing, lyophilization and heating. Both lethal and hemolytic activities of S. verrucosa venom were remarkably neutralized by the commerical stonefish (Synanceja trachynis) antivenom. This antivenom was also effective, to some extent, in counteracting the other venom activities. The neutralizing capacities of the antivenom were calculated to be 7310 LD50 ml-1 for S. verrucosa venom and 1 220 to 2 990 LD50 ml-1 for the other venoms. Results of neutralization tests suggest that venoms from the six species were comparable in terms of antigenecity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00397261
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  • 10
    Electronic Resource
    Electronic Resource
    Study of the life history of Capitella capitata (Polychaeta: Capitellidae) in Amakusa, South Japan including a comparison with other geographical regions (1984)
    Springer
    Marine biology 80 (1984), S. 315-321 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The life history of Capitella capitata (Fabricius), occurring in Amakusa, South Japan, was studied in detail through field investigations and laboratory experiments. The important life-history characteristics of this species in the present study area are described and compared with those reported in previous studies from various geographic regions. Though some life-history characteristics (extended breeding season throughout almost the whole year, parental brooding habit, and early maturation) are common to all localities, the reproductive mode, larval developmental pattern and morphology are very distinct among the worms from various localities. C. capitata showing these considerable geographical variations should not be treated as a single species. It is suggested that C. capitata, originally defined on the basis of morphological features of adult worms, needs to be subdivided into several species, subspecies, or biological races.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00392827
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