Bulletin of the Society of Sea Water Science, Japan
Online ISSN : 2185-9213
Print ISSN : 0369-4550
ISSN-L : 0369-4550
Search
Advanced search
OR
Browse
Search
Volume 54, Issue 5
Displaying 1-8 of 8 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • Radionuclides in Marine Sediments
    Teruyuki HONDA
    2000 Volume 54 Issue 5 Pages 348-359
    Published: 2000
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.54.348
    JOURNAL FREE ACCESS
    Download PDF (9581K)
  • Monitoring of Localized Corrosion in Salt Manufacturing Plant
    Yasuo TANNO, Ichiro ASANO
    2000 Volume 54 Issue 5 Pages 360-365
    Published: 2000
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.54.360
    JOURNAL FREE ACCESS
    Download PDF (10076K)
  • Salt and Health (3)
    Debates on the Issues between Salt Intake and Blood Pressure Increase
    Toshio HASHIMOTO
    2000 Volume 54 Issue 5 Pages 366-371
    Published: 2000
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.54.366
    JOURNAL FREE ACCESS
    Download PDF (11083K)
  • Crevice Corrosion Resistance of Highly Corrosion Resistant Alloys in Salt Extracting Plants
    Katsuo SUGAHARA, Yoshio TAKIZAWA
    2000 Volume 54 Issue 5 Pages 372-379
    Published: 2000
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.54.372
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Crevice corrosion resistance of nickel-based alloys (MAT21 and Hastelloy C-22), a stainless steel (SUS316L) and a titanium based alloy (Ti-0.15Pd) was evaluated in hot concentrated chloride ion solutions that simulate the operating environment in a plant that extracts salt from seawater. Electrochemical measurements showed the possibility of crevice corrosion on all materials tested in hot and highly concentrated simulated seawater solutions in the open air. In addition, the prevention of crevice corrosion on materials in the brine process of the salt extracting plant could be essentially achieved by decreasing the amount of dissolved oxygen rather than slightly decreasing the temperature and the chloride ion concentration. Cathodic protection of Hastelloy C-22 by contact with Monel was very effective for the prevention of crevice corrosion.
    View full abstract
    Download PDF (12269K)
  • Tempora Variation of Particulate Deoxyribonucleic Acid in Subarctic Coastal Seawater
    Mitsuru YANADA, Hitoshi TANAKA, Yoshiaki MALTA
    2000 Volume 54 Issue 5 Pages 380-389
    Published: 2000
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.54.380
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Particulate deoxyribonucleic acid (P-DNA), particulate organic carbon (POC), and chlorophyll a (Chl a) were measured simultaneously in seawater in a subarctic coastal region, Funka Bay, from prebloom to post bloom periods during the course of a spring bloom. The temporal variation of P-DNA concentration was not necessarily associated with that of Chl a or POC during this period. The concentration of P-DNA above 30 m in depth tended to increase with increasing Chl a and/or POC concentrations accompanied by phytoplankton production during the spring bloom. On the other hand, the concentration of P-DNA above 30 m in depth during the pre-bloom period represented a relatively high value, although the concentrations of both ChI a and POC represented low values. The concentration of P-DNA during the post-bloom period also stayed high, which was comparable to that during the spring bloom, whereas the concentration of Chl a showed a dramatic decrease. The effect on the ratios of both POC: P-DNA and Chl a: P-DNA implied that the bulk of P-DNA above 30 m in depth during the spring bloom was occupied by “living” phytoplanktonic DNA. In contrast, the ratios of POC: PDNA and Chl a: P-DNA during the pre-bloom and postbloom periods implied that the PDNA might be associated with inactive living phytoplankton in terms of “nonreplicating” DNA during the prebloom period and “non-living” DNA in terms of detrital DNA during the post-bloom period, respectively.
    View full abstract
    Download PDF (17532K)
  • Fulvic Acid-Fe Concentration in Three Rivers in Southern Hokkaido
    Mitsuru YANADA, Gridsada DEEIN, Wirongrong THIMDEE, Katsuhiko MATSUNAG ...
    2000 Volume 54 Issue 5 Pages 390-393
    Published: 2000
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.54.390
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Fulvic acid-Fe (FA-Fe) and total dissolved Fe (TD-Fe) in the water of three rivers were measured because ful-vic acid-Fe plays an important role for the growth of photosynthetic organisms in the sea. The fulvic acid-Fe in upper streams from the Shukunohe River was low (ca. 0.2μM) while its concentration in down stream increased gradually to about 3μM as iron due to the inflow of streams with high FA-Fe. FA-Fe in the other rivers showed similar concentrations as those in down stream of the Shukunohe River. The ratios of FA-Fe/TD-Fe in the Shukunohe, Kunebetsu and Ohno Rivers were 82±8, 83±2 and 84±2%, respectively, meaning that most of TD-Fe is FA-Fe.
    View full abstract
    Download PDF (2488K)
  • Shape Series of Salt (NaCl) Crystals (3)
    Masayoshi MURAKAM
    2000 Volume 54 Issue 5 Pages 394-397
    Published: 2000
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.54.394
    JOURNAL FREE ACCESS
    Download PDF (2190K)
  • Relation Between the Open of Short-necked Clam and Kind of Salts
    Shizuo SUGITA
    2000 Volume 54 Issue 5 Pages 398-400
    Published: 2000
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.54.398
    JOURNAL FREE ACCESS
    Download PDF (1466K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top