Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Junji Akai"'
Autor:
Shafi M. Tareq, Golam Ahmed, Hossain M. Anawar, Junji Akai, Arif M. Sikder, Mohammad M. Rahman, Martin Mihaljevič
Publikováno v:
Water, Vol 3, Iss 4, Pp 1050-1076 (2011)
A groundwater, sediment and soil chemistry and mineralogical study has been performed to investigate the sources and mobilization process of Arsenic (As) in shallow aquifers of Bangladesh. The groundwater from the shallow aquifers is characterized by
Externí odkaz:
https://doaj.org/article/2e5a1d1635db4159bb8851c860cd1d25
Autor:
Junji AKAI
Publikováno v:
Journal of Geography (Chigaku Zasshi). 131:213-233
Publikováno v:
Japanese Magazine of Mineralogical and Petrological Sciences. 52
Publikováno v:
European Journal of Mineralogy. 28:355-374
Cryptoperthitic alkali feldspars in the Cerro Colorado monzonites from the Atacama Desert, northern Chile, exhibit bluish iridescence. Three types of cryptoperthites are developed over a grain; fine and coarse cryptoperthites of Or-Ab-An ternary comp
Autor:
Junji Akai, Tsuyoshi Toyoshima, Yoshihiro Nakamura, Madhusoodhan Satish-Kumar, Kiyokazu Oohashi
Publikováno v:
Journal of Structural Geology. 72:142-161
We report here on two distinct processes of deformation affecting graphite in fault zones of the Hidaka metamorphic belt, Hokkaido, Japan. One process involves the micrometer-scale delamination (MMD) in the stacking of graphite, and the other is the
Autor:
Junji Akai, Takahiko Ogawara
Publikováno v:
Journal of Mineralogical and Petrological Sciences. 109:125-137
Graphite-3R was found at an outcrop in Kanayamadani, central Japan that had green-black jadeitite, altered jadeitite, and fracture zones in serpentine melange. The graphite from the three zones was characterized using polarizing microscopy, XRD, Rama
Autor:
Junji Akai, Tosio Muramatsu
Publikováno v:
Japanese Magazine of Mineralogical and Petrological Sciences. 42:174-184
Twin crystals of zircon in SK030 volcanic ash layer in Uonuma Formation, which is Cenozoic strata in Niigata Prefecture, central Japan, were examined mineralogically. Zircon in the SK030 layer was along with monazite, xenotime and corundum crystals.
Autor:
Junji Akai, Hossain M. Anawar
Publikováno v:
Physics and Chemistry of the Earth, Parts A/B/C. :2-12
Mineralogy and mineral-microbe interactions play a significant role in the environmental contamination of toxic trace elements in groundwater and wetland ecosystems. This review has described the importance of use of TEM that is an essential tool to
Publikováno v:
Physics and Chemistry of the Earth, Parts A/B/C. :42-48
Deep-sea manganese (Mn) nodules are problematic in terms of factors such as their characteristic form and genesis. There are many reports of bacterial species from manganese nodules. However, the genesis of these nodules has not been fully confirmed.
Autor:
Junji Akai, Yoshihiro Nakamura
Publikováno v:
Journal of Mineralogical and Petrological Sciences. 108:131-143
Graphitization of carbonaceous material (CM) in the Gyoja-yama contact aureole, northwest of Kyoto, Japan, was examined using high-resolution transmission electron microscopy (HRTEM), X-Ray Diffractometry (XRD), and Micro-Raman spectroscopy. In this