Bulletin of the Society of Sea Water Science, Japan
Online ISSN : 2185-9213
Print ISSN : 0369-4550
ISSN-L : 0369-4550
Volume 42, Issue 2
Displaying 1-4 of 4 articles from this issue
  • Rokuro NISHIMURA
    1988 Volume 42 Issue 2 Pages 49-58
    Published: 1988
    Released on J-STAGE: February 19, 2013
    JOURNAL FREE ACCESS
    Download PDF (10185K)
  • Aijun TONG, Yoshifumi AKAMA, Shigeyuki TANAKA
    1988 Volume 42 Issue 2 Pages 59-62
    Published: 1988
    Released on J-STAGE: February 19, 2013
    JOURNAL FREE ACCESS
    Trace amount of calcium and magnesium in high purity sodium chloride was determined b atomic absorption spectrometry combined with 1-pheny1-3-methyl-4-benzoy1-5-pyrazolone (PMBP)-MIBK extraction. The optimum conditions for the extraction of calcium and magnesium were examined. The procedure was as follows: About 40 g of the salt sample was dissolved in water and diluted to 200 ml. Twenty ml of the sample solution was pipetted into a 100 ml separating funnel. Ten ml of NH3-NH4Cl buffer solution (pH 9), which had been purified by two extractions with PMBP-MIBK solution, was added. Then 10 ml of 0.02 M PMBP-MIBK solution was added and the two phases were shaken for 5 min to extract calcium and magnesium to the MIBK phase. The separated organic layer was analyzed by atomic absorption spectrometry.
    The relative standard deviation of four repeated analyses of sodium chloride was 4.1-5.9% for calcium and 1.4-8.3% for magnesium, respectively. The recoveries of calcium and magnesium added to sodium chloride samples were excellent.
    Download PDF (2510K)
  • Studies on the Property of Matter of Common Salt (Part 2)
    Tomio SHINOHARA, Satoshi NAGATUKA, Noboru OGATA, Shizuo SUGITA
    1988 Volume 42 Issue 2 Pages 63-72
    Published: 1988
    Released on J-STAGE: February 19, 2013
    JOURNAL FREE ACCESS
    The flowability of domestic kitchen salt was measured in relation to Carr's flowability index (CFI), compressibility, angle of repose, free-flowing time, and some others; the relationships between each measurement method and the factors affecting the flowability were examined. The results were as follows:
    (1) Flowability of the salts was not correctly determined from only CFI because of the narrow range of the flowability.
    (2) A good correlation was observed between compressibility and CFI.
    (3) Carr's point scores on compressibility and uniformity for evaluation of CFI has no relationships to CFI values.
    (4) The rate of the salts which need no anticaking treatment was estimated to be 71% from the evaluation of CFI.
    (5) The moisture content of the salts has a great effect on flowability, especially on free-flowing time, angle of repose, and CFI. Nevertheless, it seemed that the flowability could not adequately be estimated from moisture content.
    (6) The free-flowing time was not closely related to CFI, compressibility, and angle of repose.
    Download PDF (6508K)
  • Shigeru KATO, Sangop PANICHART, Sanit AKSORNKOAE, Takehisa NAKAMURA, J ...
    1988 Volume 42 Issue 2 Pages 73-85
    Published: 1988
    Released on J-STAGE: February 19, 2013
    JOURNAL FREE ACCESS
    Ten species of mangrove plants collected from Phang Nga forest of Southern Thailand were analyzed for inorganic ions (anions and cations) and organic acids. Moreover, the relationships between mangrove plants species and their growing areas are also examined. Transplantation of collected mangrove viviporous seeds from Phang Nga forest to Iriomote, Okinawa, for comparative study on cultivation between Thailand and Okinawa, is discussed. Inorganic ions in 4 species of these mangrove species were analyzed for comparison of amount of inorganic ions and organic acids between the Thailand and Okinawa growth conditions.
    Accumulations of Na+ and Cl- ions in the leaf of each mangrove species are affected by the degree of sea water tide and its concentration. Species directly affected by sea water such as Rhizophora mucronata and Avicennia alba indicated higher amounts of Na+ and Cl- ions than species distributed in inner mangrove forest areas and a low concentration of sea water (NaCl concentration).
    Amounts of anions and cations in all old leaves were higher than in young-stage leaves. However, the amounts of anions and cations in young-stage leaves of Avicennia spp. were higher than in old-stage leaves. Analyzed mangrove plant leaves of December samples showed higher accumulation of ions than April samples. December in Phang Nga of Southern Thailand is the summer dry season, and the end of April is the start of the rainy season. Concentration of organic acids in mangrove leaves is dependent on species zonation of mangrove plants in the mangrove forest. The front of Mangrove forest and river-mouth area mangrove plant species indicated a higher concentration of organic acids than those not affected by sea water or which had a low concentration of sea water affecting the mangrove plants. Results of Okinawa cultivated mangrove leaves (transplanted plant leaves) indicated a lower accumulation of inorganic ions than Thailand mangrove leaf samples. The accumulation of these inorganic ions by mangrove plants may be dependent on environmental conditions of growth areas (temperature, light, sea water, soil, season and others).
    Download PDF (9119K)
feedback
Top