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  • 1
    Electronic Resource
    Electronic Resource
    Methane emission fluxes from rice paddies and the methane productive potential in the soils (1997)
    Springer
    Nutrient cycling in agroecosystems 49 (1997), S. 129-138 
    Details
    ISSN: 1573-0867
    Keywords: methane emission ; productive potential ; seasonal variation ; total CO2
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract We estimated the productive potential of methane in paddy soils by anaerobically incubating soils in the laboratory. In addition, we determined the emission fluxes from the rice paddies through rice plants during the whole growth period, according to the methods suggested by Cicerone & Shetter (1981). The results showed that the total amounts of methane emission from rice paddies were very close to the productive potential of the soils and suggested that the large parts of methane emitted from rice paddies originated from the productive potential of methane.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009750106640
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  • 2
    Electronic Resource
    Electronic Resource
    Significance of each of three missense mutations, G484A, G667A, and G808A, present in an inactive allele of the human Lewis gene (FUT3) for α(1,3/1,4)fucosyltransferase inactivation (1998)
    Springer
    Glycoconjugate journal 15 (1998), S. 961-967 
    Details
    ISSN: 1573-4986
    Keywords: α(1,3/1,4)fucosyltransferase ; Fuc-TIII ; Lewis-negative allele ; Chimera ; Mutation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Recently, we found three novel missense mutations, G484A (Asp162Asn), G667A (Gly223Arg), and G808A (Val270Met), present in a Lewis-negative allele (le484,667,808) from an African (Xhosa) population. To define the relative contribution of each of the three mutations in the le484,667,808 allele for inactivation of the FUT3-encoded enzyme, we made chimeric FUT3 containing each of the three mutations. A transient expression study indicated that COS7 cells transfected with the FUT3 construct containing the G484A mutation expressed the Lewis antigen and had about 20% enzyme activity as compared with COS7 cells transfected with the wild type FUT3 allele, whereas COS7 cells transfected with the FUT3 construct containing either the G667A mutation or the G808A mutation did not express the Lewis antigen and showed no detectable α(1,3/1,4)fucosyltransferase activity. These results suggest that the G667A and/or the G808A missense mutations of FUT3 alleles are responsible for the inactivation of the FUT3-encoded enzyme.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006981724233
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  • 3
    Electronic Resource
    Electronic Resource
    Influence of rice cultivar on methane emission from paddy fields (1995)
    Springer
    Plant and soil 176 (1995), S. 51-56 
    Details
    ISSN: 1573-5036
    Keywords: biomass ; irrigation ; methane emission ; paddy field ; rice cultivar
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Influence of rice cultivars on CH4 emissions from a paddy field was studied using four Japonica types, two Indica types, and two Japonica/Indica F1 hybrids. In addition, the suppression of CH4 emission by interrupting irrigation at the flowering stage was investigated. Patterns of seasonal variation in CH4 emission rates were similar among the eight cultivars. Two of the Japonica types showed the maximum and minimum CH4 emissions among the cultivars investigated. Neither the number of tillers, shoot length, shoot weight, and root weight correlated with the CH4 emission rates at the tillering and reproductive growth stages. Following temporary interruption of irrigation at the flowering stage, CH4 emission rates decreased drastically and remained at very low levels until the harvesting stage, indicating its great effectiveness for the suppression of CH4 emission from rice paddies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00017674
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  • 4
    Electronic Resource
    Electronic Resource
    Estimation of the increase in CH4 emission from paddy soils by rice straw application (1995)
    Springer
    Plant and soil 173 (1995), S. 225-231 
    Details
    ISSN: 1573-5036
    Keywords: effective temperature ; estimation ; methane emission ; paddy soil ; rice straw
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The relationship between the amount of CH4 emission to the atmosphere from submerged paddy soils with rice plants and the application level (0–8 g kg-1) of rice straw (RS) in soil was investigated in a pot experiment. Amounts of CH4 emitted from pots with respective RS levels differed between a clayey yellow soil and a silty gray lowland soil. However, the increase in cumulative amounts of CH4 emission with the increase in the application level of RS was similar in pattern between the two soils, and the increase (Y) was formulated with a logistic curve: x, application level of RS; k, a coefficient for relative CH4 emission. Since the seasonal variations in coefficients a, b, and c in the logistic equation were also formulated as the function of the sum of effective temperature (E, Σ(T−15); T, daily average temperature), the increase in cumulative amounts of CH4 emission from any paddy soil by any level of RS application was known to be estimated by the following equation:
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00011459
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  • 5
    Electronic Resource
    Electronic Resource
    Three-year measurement of methane emission from an Indonesian paddy field (1996)
    Springer
    Plant and soil 181 (1996), S. 287-293 
    Details
    ISSN: 1573-5036
    Keywords: dry season ; Indonesian paddy field ; methane emission ; rice straw ; wet season ; yield
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Yearly and seasonal (rainy and dry seasons) variations of CH4 emission from a Sumatra paddy field were measured for 3 years. The mean CH4 emission rates during the growth period were in the range of 16.0–26.1 mg CH4 m-2 h-1 for the chemical fertilizer plots and 23.3–34.9 mg CH4 m-2 h-1 for the plots with rice straw application, respectively. The increase in the amounts of CH4 emission by rice straw application were from 1.3 to 1.6 times. There was no significant difference in the mean CH4 emission rates between rainy and dry seasons. Total amounts of CH4 emitted during the period of rice growth were in the ranges of 29.5–48.2 and 43.0–64.6 g CH4 m-2 for the plots applied with chemical fertilizer and those with rice straw application, respectively. Nearly the same amounts of CH4 were emitted in the first and second half of the growth period, irrespective of rice straw application.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00012063
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  • 6
    Electronic Resource
    Electronic Resource
    Isolation and characteristics of yeasts able to grow at low concentrations of nutrients (1998)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 14 (1998), S. 233-238 
    Details
    ISSN: 0749-503X
    Keywords: Oligotrophic yeasts ; low-nutrient conditions ; starvation ; Cryptococcaceae ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Seven oligotrophic yeasts, which can grow in a 104-fold dilution of malt-yeast-glucose-peptone medium (10-4 YM), were mainly isolated from soil. These yeasts belong to the Cryptococcaceae. When inoculated at about 102 cells/ml in 10-4 YM, the isolates grew to 1·4×103-2·4×105 cells/ml after 3 days. Some culture collection yeasts fell into three groups according to their growth characteristics in 10-4 YM, one group showing characteristics of the oligotrophic yeasts. The half-saturation values of uptake by the five isolated oligotrophic yeasts for D-glucose, L-leucine and L-amino acids were 6·0-25·0, 1·7-43·3 and 3·5-21·6 μM, respectively. The oligotrophic yeasts suspended in 10 mM-phosphate buffer (pH 6·0) had high tolerances for starvation, and remained more than 15% viable after 90 days of starvation. © 1998 John Wiley & Sons, Ltd.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 7
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    Formation of actin stress fibers and focal adhesions enhanced by Rho-kinase (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-02-28
    Description: The small guanosine triphosphatase (GTPase) Rho is implicated in the formation of stress fibers and focal adhesions in fibroblasts stimulated by extracellular signals such as lysophosphatidic acid (LPA). Rho-kinase is activated by Rho and may mediate some biological effects of Rho. Microinjection of the catalytic domain of Rho-kinase into serum-starved Swiss 3T3 cells induced the formation of stress fibers and focal adhesions, whereas microinjection of the inactive catalytic domain, the Rho-binding domain, or the pleckstrin-homology domain inhibited the LPA-induced formation of stress fibers and focal adhesions. Thus, Rho-kinase appears to mediate signals from Rho and to induce the formation of stress fibers and focal adhesions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Amano, M -- Chihara, K -- Kimura, K -- Fukata, Y -- Nakamura, N -- Matsuura, Y -- Kaibuchi, K -- New York, N.Y. -- Science. 1997 Feb 28;275(5304):1308-11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Signal Transduction, Nara Institute of Science and Technology, Ikoma 630-01, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9036856" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Actins/*metabolism ; Adenosine Triphosphate/metabolism ; Animals ; Binding Sites ; *Cell Adhesion ; Cell Line ; DNA, Complementary/genetics ; Enzyme Inhibitors/pharmacology ; GTP Phosphohydrolases/metabolism ; Intracellular Signaling Peptides and Proteins ; Lysophospholipids/pharmacology ; Mice ; Mutation ; Protein-Serine-Threonine Kinases/antagonists & inhibitors/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Staurosporine/pharmacology ; rho-Associated Kinases
    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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  • 8
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    daf-2, an insulin receptor-like gene that regulates longevity and diapause in Caenorhabditis elegans (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-08-15
    Description: A C. elegans neurosecretory signaling system regulates whether animals enter the reproductive life cycle or arrest development at the long-lived dauer diapause stage. daf-2, a key gene in the genetic pathway that mediates this endocrine signaling, encodes an insulin receptor family member. Decreases in DAF-2 signaling induce metabolic and developmental changes, as in mammalian metabolic control by the insulin receptor. Decreased DAF-2 signaling also causes an increase in life-span. Life-span regulation by insulin-like metabolic control is analogous to mammalian longevity enhancement induced by caloric restriction, suggesting a general link between metabolism, diapause, and longevity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kimura, K D -- Tissenbaum, H A -- Liu, Y -- Ruvkun, G -- R01AG14161/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 1997 Aug 15;277(5328):942-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9252323" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue/metabolism ; Amino Acid Sequence ; Animals ; Caenorhabditis elegans/chemistry/*genetics/growth & development/metabolism ; Caenorhabditis elegans Proteins ; Chromosome Mapping ; Conserved Sequence ; Energy Intake ; *Genes, Helminth ; Glucose/metabolism ; Humans ; Insulin/metabolism ; Larva/genetics/growth & development/metabolism ; Longevity/*genetics ; Molecular Sequence Data ; Mutation ; Phosphatidylinositol 3-Kinases ; Phosphatidylinositol Phosphates/metabolism ; Phosphorylation ; Phosphotransferases (Alcohol Group Acceptor)/metabolism ; Receptor, IGF Type 1/chemistry/genetics ; Receptor, Insulin/chemistry/*genetics/metabolism ; Signal Transduction
    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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