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  • 1
    Electronic Resource
    Electronic Resource
    Precipitation chemistry in Japan 1989–1993 (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 2307-2312 
    Details
    ISSN: 1573-2932
    Keywords: Precipitation chemistry ; sulfate ; nitrate ; ammonium ; calcium ; pH ; Japan
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Precipitation chemistry in Japan was discussed on a wet-only sample database obtained in a nationwide survey from April 1989 to March 1993. Wet-only samples were collected at 29 stations over Japan on a biweekly basis. Commonly determined chemical parameters were measured in laboratories. The volume-weighted annual mean pH at each site ranged from 4.50 to 5.83 with a mean of 4.76. Concentration ranges and means (parenthesized) on an equivalent basis for major ions were as follows: nss-SO4 2−; 5.2–58.9 (38.6), NO3 −; 1.8–25.0 (14.1), NH4 +; 0.55–29.8 (18.3), nss-Ca2+; 2.0–34.5(14.2), Na+; 6.4–275.3 (49.1), Cl−; 13.7–322.4 (63.5) β eq L−1. Acid-base relationships for Phase-II records were quantitatively discussed in terms of three measures: pH, fractional acidity, and our proposed pAi.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01186178
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  • 2
    Electronic Resource
    Electronic Resource
    Relationship between wet deposition of sulfate and nitrate and rainfall amount in Japan (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 2167-2172 
    Details
    ISSN: 1573-2932
    Keywords: Sulfate ; nitrate ; wet deposition ; rainfall amount ; precipitation scavenging ; lognormal distribution ; Japan
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A regression model of wet deposition on rainfall amount for non-seasalt sulfate (nss-SO4 2−) and nitrate (NO3 −) was applied to a data set obtained through a nationwide survey from April 1989 to March 1993. Wet-only samples on a biweekly basis were collected at 29 sites over Japan. Reparameterized bivariate lognormal distribution was employed to describe the joint distribution of concentration (C) and rainfall amount (R) for each site. Ranges of geometric mean (μD) of biweekly deposition (D = C. R) for each site were 0.54–2.90 meq m−2 for nss-SU4 2−, and 0.21–1.36 meq m−22 for NO3 −; that of biweekly rainfall amount (μR) was 24.1–78.0 mm. Urban or industrialized areas had high values of μD for these ions. Ranges of estimates of the slope of the regression equation of log(D/μD) on log(R/μR), were 0.45–0.99 for nss-SO4 2−, and 0.35–0.86 for NO3 −; thus estimates of the slope for nss-SO4 2− tend to be larger than those for NO3 −. The present analysis, consequently, statistically clarified some differences between the two ions in deposition processes which is understood in the light of current knowledge of atmospheric chemistry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01186155
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  • 3
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    Gain-of-function mutations of c-kit in human gastrointestinal stromal tumors (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-02-07
    Description: Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal tumors in the human digestive tract, but their molecular etiology and cellular origin are unknown. Sequencing of c-kit complementary DNA, which encodes a proto-oncogenic receptor tyrosine kinase (KIT), from five GISTs revealed mutations in the region between the transmembrane and tyrosine kinase domains. All of the corresponding mutant KIT proteins were constitutively activated without the KIT ligand, stem cell factor (SCF). Stable transfection of the mutant c-kit complementary DNAs induced malignant transformation of Ba/F3 murine lymphoid cells, suggesting that the mutations contribute to tumor development. GISTs may originate from the interstitial cells of Cajal (ICCs) because the development of ICCs is dependent on the SCF-KIT interaction and because, like GISTs, these cells express both KIT and CD34.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hirota, S -- Isozaki, K -- Moriyama, Y -- Hashimoto, K -- Nishida, T -- Ishiguro, S -- Kawano, K -- Hanada, M -- Kurata, A -- Takeda, M -- Muhammad Tunio, G -- Matsuzawa, Y -- Kanakura, Y -- Shinomura, Y -- Kitamura, Y -- New York, N.Y. -- Science. 1998 Jan 23;279(5350):577-80.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, Osaka University Medical School, Yamada-oka 2-2, Suita 565, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9438854" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antigens, CD34/analysis ; Cell Line ; Cell Transformation, Neoplastic ; DNA, Complementary ; Digestive System/cytology ; Esophageal Neoplasms/genetics/metabolism/pathology ; Gastrointestinal Neoplasms/chemistry/*genetics/pathology ; Humans ; Intestinal Neoplasms/chemistry/genetics/pathology ; Ligands ; Mice ; Mice, Nude ; Molecular Sequence Data ; *Mutation ; Phosphorylation ; Phosphotyrosine/metabolism ; Proto-Oncogene Proteins c-kit/analysis/chemistry/*genetics/metabolism ; Recombinant Proteins/pharmacology ; Sequence Deletion ; Stem Cell Factor/pharmacology ; Stomach Neoplasms/genetics/metabolism/pathology ; Transfection
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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