Netsu Sokutei
Online ISSN : 1884-1899
Print ISSN : 0386-2615
ISSN-L : 0386-2615
Search
Advanced search
OR
Browse
Search
Volume 34, Issue 2
Displaying 1-5 of 5 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • Introduction to Environmental Physics and Thermo-Physics
    Makoto Kano
    2007 Volume 34 Issue 2 Pages 60-67
    Published: March 31, 2007
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.34.60
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    On the environmental problem, the challenge from the viewpoint of environmental physics is outlined. For the beginning, it is described the approach which explains on the concept of environmental physics and the historical process for finding the solution of environmental problems from the global environment. In the current, in order to understand the environment from the physics, the thermo-physical viewpoint is finally outlined, and it is explained that the approach from the thermo-physics is indispensable.
    View full abstract
    Download PDF (2563K)
  • Global Mass Circulation in Earth System
    Carbon Cycle and Climate Change
    Naotatsu Shikazono, Hirohiko Kashiwagi
    2007 Volume 34 Issue 2 Pages 68-76
    Published: March 31, 2007
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.34.68
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Earth system is composed of several reservoirs (boxes) such as atmosphere, hydrosphere, biosphere, geosphere and humans. Mass and energy circulations are occurring between these reservoirs. In long-term period, the steady state conditions are attained. However, in a short-term period, geologic events (e. g., volcanic activity) and humans activity (e. g., anthropogenic CO2 emission to atmosphere) largely influence the amount and concentration of elements in reservoirs. For example, atmospheric CO2 concentration has been increasing during the last 250 years due to the anthropogenic CO2 emission. Global geochemical cycle simulations based on multi box model (linear and pseudononlinear model) are useful to clarify the changes in atmospheric CO2 concentration and climate (e. g., atmospheric temperature) during the past and in the future. In this paper, the results of previous model calculations on those CO2 and temperature changes during the past (e. g., 108 years, 6.0×106 years, and 120 years) are given. The unsolved problems on the calculations (the uncertainty of parameters, assumptions on the calculations etc.) are cited.
    View full abstract
    Download PDF (1859K)
  • The Roles of Soil Microbes in the Global Environment
    Kunimasa Koga
    2007 Volume 34 Issue 2 Pages 77-86
    Published: March 31, 2007
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.34.77
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Attention has been paid to CO2 balance of atmosphere along with global warming. The soil stores carbon in organic matters twice as much as carbon in atmosphere, and, on the other hand, the soil releases CO2 into atmosphere by soil respiration. Therefore, the soil has two characteristics as C storing warehouse and a supplier of CO2. Though soil respiration is chiefly due to the activity of soil microbes, the behavior of them has been hardly evaluated from the aspect of the CO2 generation. The microbe calorimeter is a suitable device for catching the behavior of the microbes in the soil nondestructively. In the present manuscript, the calorimetric studies about influences of soil microbes on the environmental condition were explained. A change in the metabolic heat (thermogram) of the soil microbes with decomposition of organic matters was similar to a change in the CO2 generation under the same condition, and profiles of the thermograms and of the CO2 generation curves varied according to the different kinds of organic matter and the soil. A microbe composition was known to change dynamically with decomposing the organic matters using the microbe calorimetry and the DGGE (Denaturing Gradient Gel Electrophoresis) technique. Soil microbes could not decompose a specific amino acid easily, and on the other hand, could decompose rapidly catechins and bio-degradable plastics beyond our expectation. The calorimetric method can offer the kinetically evaluating technique about the influence of herbicides, pesticides and heavy metals on the decomposing activity of soil microbes. The microbe calorimetry is useful for the investigation about the generation mechanism of CO2 in the soil.
    View full abstract
    Download PDF (3280K)
  • Roles of Thermal Analysis in Asbestos Problem
    Akira Kishi
    2007 Volume 34 Issue 2 Pages 87-93
    Published: March 31, 2007
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.34.87
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    This report describes thermal decomposition behavior of asbestos including chrysotile analyzed by using TG-DTA and other analytical instruments. Heating process at least at 1100°C is required in order to dissolve asbestos into harmless minerals. Heating treatment of asbestos at 700°C mixed with chlorofluorocarbon waste is proposed as a new low temperature treatment of asbestos to make products harmless. Thermal analysis will be playing more important role in the development of methods to render asbestos harmless.
    View full abstract
    Download PDF (1496K)
  • [title in Japanese]
    2007 Volume 34 Issue 2 Pages 94-98
    Published: March 31, 2007
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.34.94
    JOURNAL FREE ACCESS
    Download PDF (868K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top