It is generally known that carbonaceous chondrites contain several classes of organic compounds such as amino acids and carboxylic acids. In addition, carbonaceous chondrites also contain solvent-insoluble macromolecules, which is the most abundant organic molecules in carbonaceous chondrites. Although several studies have reported about the structure of macromolecules using NMR and degradative techniques, little information about the isotopic compositions have been reported previously. So, we report carbon and hydrogen isotopic compositions of macromolecular organic matter from 7 carbonaceous chondrites measured by EA/IRMS. Our results suggest that 7 carbonaceous chondrites can bebroadly seperated by 3 groups with relevance to the isotopic compositions.

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Titan, the largest satellite of Saturn, has dense atmosphere composed of nitrogen and methane. Complex organic compounds were also observed in Titan atmosphere. There have been many experiments simulating reactions in Titan atmosphere, but most of them simulated the upper atmosphere of Titan. We here simulated the cosmic rays-induced reactions in the lower atmosphere of Titan by using high energy protons. Complex organic compounds containing amino acid precursors were detected.

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Recentry, many Japanese people dislike the science. Then, Japan Geoscience Union proposed the science riteracy education for all people during the primaly School, Junior high school and Senior high school. I want to introduce contents of the proposals.

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"Present conditions and issues in senior high school geochemistry education" is the theme for this lecture. However, I have boldly changed it into "Science of Gold, Tofu and Hot Springs." I have had several opportunities to give a speech on that title in a senior high schools a university and in public. I just would like to emphasize that the title includes my own message on science education. I will be happy if any of you have any questions about the significance of my new theme. By the way, I teach only chemistry in my school. Needless to say, chemistry can't exist on it own. Chemistry relates closely to other scientific fields. I believe that the relationship between these field will be benefitted through geochemistry. I am confident that chemistry, once added to the viewpoint of earth science, will be a splendid, deep and wide axis of time and space. Let me introduce a mere part of the contents and the responses of the people. It would be fortunate if we can disscuss earth science education from the foundation of the above statement.

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Sensor for pCO‹SUB›2‹/SUB› measurement on the surface ocean has been developing to estimate flux of CO‹SUB›2‹/SUB› between atmosphere and ocean. This sensor will be attached on drifting buoy, and data are sent to laboratory through satellite. In this presentation, we introduce our developing system and basic technique for pCO‹SUB›2‹/SUB› measurement.

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Measurements of volatile organic compounds (VOCs) in air are widely conducted by gas chromatographic methods, whereby time resolution is typically on the order of hours. Recent advancement of proton transfer reaction mass spectrometry has enabled us to measure VOCs continuously, and greatly improved our understanding of the role of VOCs in a variety of fields including urban and regional air pollution, aerosol nucleation, and atmosphere-biosphere interactions. In this study we are exploring its potential to achieve fast measurements of multi-organic species in air by combination of a proton transfer reaction ion source with a time of flight mass spectrometer. Detection principle, outline of instrumentation, and initial results will be presented.

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In research of River water quality, It is important that examination of the average or representative water quality so that we can find solution for water environmental problem by complicated factor. Data of river water quality has stocked to date in many regions but the accuracy of these data is uncertainty in measurement. So it is difficult to weigh each basin's loadings. In this study, use Electric conductivity; easily be measured, to calculated relational expression for major inorganic ion and hydrological variate. In addition, use water quality data of Telemeter to multiple classification analysis and estimate of logical river water quality dynamism in the three years past in Asa-River, Tokyo.

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Some natural-analogue studies of Tono-area have done. To complete natural-analogue study, one of the most important task is to know underground water. Although only few studies from a multiple viewpoint refer to the interpretations about this area. So in this study, I will analyze and interpret the underground water in Tono area and round up the results.

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The sound producing sand beach is a unique phenomenon occurring around the world. It is something for which Japan is well-known. The singing properties of the sand are very sensitive to pollution, in that they can be acting as a sensor for it. Therefore, the quality of the sound producing property of sound producing sand on the beach is a sign that shows purity of its environment. The sand from 30 beaches in the Japanese coasts has made sound. Some of the beaches in Northeastern to Northern Japan and they are fall into 3 geological lines of granite in magnetite series of the Cretaceous, and sandstone of the Upper Jurassic and Miocene age. This study is performed to characterize the sound producing sand geologically. Tests on the mineralogy, major and minor element compositions of major and minor, and trace elements were performed to identify the differences between sound producing sand and silent sand samples.

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We had several boring cores from the Kanamaru district near the boundary of Yamagata and Niigata Prefectures in order to study the behaviors of uranium-series nuclides in sediments. The uranium-series nuclides in some boring cores were analyzed by sequential chemical leaching method. The results will be shown in this meeting.

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