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  • 1
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    Discovery of moganite in a lunar meteorite as a trace of H2O ice in the Moons regolith (2018)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2018-05-03
    Description: Moganite, a monoclinic SiO 2 phase, has been discovered in a lunar meteorite. Silica micrograins occur as nanocrystalline aggregates of mostly moganite and occasionally coesite and stishovite in the KREEP (high potassium, rare-earth element, and phosphorus)–like gabbroic-basaltic breccia NWA 2727, although these grains are seemingly absent in other lunar meteorites. We interpret the origin of these grains as follows: alkaline water delivery to the Moon via carbonaceous chondrite collisions, fluid capture during impact-induced brecciation, moganite precipitation from the captured H 2 O at pH 9.5 to 10.5 and 363 to 399 K on the sunlit surface, and meteorite launch from the Moon caused by an impact at 8 to 22 GPa and 〉673 K. On the subsurface, this captured H 2 O may still remain as ice at estimated bulk content of 〉0.6 weight %. This indicates the possibility of the presence of abundant available water resources underneath local sites of the host bodies within the Procellarum KREEP and South Pole Aitken terranes.
    Electronic ISSN: 2375-2548
    Topics: Natural Sciences in General
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Olfactory plasticity is regulated by pheromonal signaling in Caenorhabditis elegans (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-10-12
    Description: Population density-dependent dispersal is a well-characterized strategy of animal behavior in which dispersal rate increases when population density is higher. Caenorhabditis elegans shows positive chemotaxis to a set of odorants, but the chemotaxis switches from attraction to dispersal after prolonged exposure to the odorants. We show here that this plasticity of olfactory behavior is dependent on population density and that this regulation is mediated by pheromonal signaling. We show that a peptide, suppressor of NEP-2 (SNET-1), negatively regulates olfactory plasticity and that its expression is down-regulated by the pheromone. NEP-2, a homolog of the extracellular peptidase neprilysin, antagonizes SNET-1, and this function is essential for olfactory plasticity. These results suggest that population density information is transmitted through the external pheromone and endogenous peptide signaling to modulate chemotactic behavior.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3021133/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3021133/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yamada, Koji -- Hirotsu, Takaaki -- Matsuki, Masahiro -- Butcher, Rebecca A -- Tomioka, Masahiro -- Ishihara, Takeshi -- Clardy, Jon -- Kunitomo, Hirofumi -- Iino, Yuichi -- CA24487/CA/NCI NIH HHS/ -- GM087533/GM/NIGMS NIH HHS/ -- K99 GM087533/GM/NIGMS NIH HHS/ -- K99 GM087533-01/GM/NIGMS NIH HHS/ -- R00 GM087533/GM/NIGMS NIH HHS/ -- R00 GM087533-03/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Sep 24;329(5999):1647-50. doi: 10.1126/science.1192020.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biophysics and Biochemistry, Graduate School of Science, University of Tokyo, Tokyo 113-0032, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20929849" target="_blank"〉PubMed〈/a〉
    Keywords: *Adaptation, Physiological ; Animals ; Caenorhabditis elegans/genetics/*physiology ; Caenorhabditis elegans Proteins/genetics/*metabolism ; *Chemotaxis ; Down-Regulation ; Gene Expression Regulation ; Mutation ; Neprilysin/genetics/*metabolism ; Neurites/metabolism ; Neurons/metabolism ; Odors ; Olfactory Pathways/cytology/physiology ; Pheromones/*metabolism ; Population Density ; Recombinant Fusion Proteins/metabolism ; Repressor Proteins/genetics/*metabolism ; *Signal Transduction ; Smell/physiology
    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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  • 3
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    Role of synaptic phosphatidylinositol 3-kinase in a behavioral learning response in C. elegans (2014)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2014-07-19
    Description: The phosphatidylinositol 3-kinase (PI3K) pathway regulates many cellular functions, but its roles in the nervous system are still poorly understood. We found that a newly discovered insulin receptor isoform, DAF-2c, is translocated from the cell body to the synaptic region of the chemosensory neuron in Caenorhabditis elegans by a conditioning stimulus that induces taste avoidance learning. This translocation is essential for learning and is dependent on the mitogen-activated protein kinase-regulated interaction of CASY-1 (the calsyntenin ortholog) and kinesin-1. The PI3K pathway is required downstream of the receptor. Light-regulated activation of PI3K in the synaptic region, but not in other parts of the cell, switched taste-attractive behavior to taste avoidance, mimicking the effect of conditioning. Thus, synaptic PI3K is crucial for the behavioral switch caused by learning.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ohno, Hayao -- Kato, Shinya -- Naito, Yasuki -- Kunitomo, Hirofumi -- Tomioka, Masahiro -- Iino, Yuichi -- New York, N.Y. -- Science. 2014 Jul 18;345(6194):313-7. doi: 10.1126/science.1250709.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan. JST, CREST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan. ; Department of Biological Sciences, Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan. ; Department of Biological Sciences, Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan. Molecular Genetics Research Laboratory, Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan. ; Molecular Genetics Research Laboratory, Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan. seidai@gen.s.u-tokyo.ac.jp iino@bs.s.u-tokyo.ac.jp. ; Department of Biological Sciences, Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan. JST, CREST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan. Molecular Genetics Research Laboratory, Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan. seidai@gen.s.u-tokyo.ac.jp iino@bs.s.u-tokyo.ac.jp.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25035490" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/*physiology ; Caenorhabditis elegans/genetics/*physiology ; Caenorhabditis elegans Proteins/genetics/metabolism/*physiology ; Learning/*physiology ; Light ; Phosphatidylinositol 3-Kinases/genetics/*physiology ; Protein Isoforms/metabolism ; Receptor, Insulin/metabolism ; Synapses/*enzymology
    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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  • 4
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    Discovery of fossil asteroidal ice in primitive meteorite Acfer 094 (2019)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2019
    Description: 〈p〉Carbonaceous chondrites are meteorites believed to preserve our planet’s source materials, but the precise nature of these materials still remains uncertain. To uncover pristine planetary materials, we performed synchrotron radiation–based x-ray computed nanotomography of a primitive carbonaceous chondrite, Acfer 094, and found ultraporous lithology (UPL) widely distributed in a fine-grained matrix. UPLs are porous aggregates of amorphous and crystalline silicates, FeNi sulfides, and organics. The porous texture must have been formed by removal of ice previously filling pore spaces, suggesting that UPLs represent fossils of primordial ice. The ice-bearing UPLs formed through sintering of fluffy icy dust aggregates around the H〈sub〉2〈/sub〉O snow line in the solar nebula and were incorporated into the Acfer 094 parent body, providing new insight into asteroid formation by dust agglomeration.〈/p〉
    Electronic ISSN: 2375-2548
    Topics: Natural Sciences in General
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
    Electronic Resource
    Electronic Resource
    Concentrically arranged endoplasmic reticulum containing some lamellae (bar-like structure) in alveolar type II cells of rat lung
    Amsterdam : Elsevier
    Journal of Ultrasructure Research 93 (1985), S. 116-128 
    Details
    ISSN: 0022-5320
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0889-1605(85)90091-6
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  • 6
    Electronic Resource
    Electronic Resource
    Formation of contacts between mast cells and sympathetic neurons in vitro (1991)
    Springer
    Cell & tissue research 265 (1991), S. 121-128 
    Details
    ISSN: 1432-0878
    Keywords: Autonomic ganglia ; Immune system ; Light microscopy ; Mast cells ; Neurons ; Tissue culture ; Mouse (CBA) ; Rat (Wistar, C. River)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Functional interactions between mast cells and peripheral nerves may occur at sites of association seen in vivo. To study the interactions, we developed a tissue culture model of murine sympathetic neurons co-cultured with rat basophilic leukaemia (RBL-2H3) cells (homologues of mucosal mast cells) or rat peritoneal mast cells. In co-cultures of up to 3 days, light microscopy identified neurite contacts with peritoneal mast cells or RBL-2H3 cells, but not with glial cells or fibroblasts. Electron microscopy confirmed membrane-membrane contact between neurites and RBL-2H3 cells. Time-lapse analysis of interactions between neurons and RBL-2H3 cells showed that 60–100% of the cells in a given field acquired neurite contact within 17 h. In matching control studies, there was no increase in the frequency of neurite contact with cells of the rat plasmacytoma line (YB2/0): these were not selected as targets, and contacts were broken if formed. Time-lapse records of the derivation of neurites from their path suggested a neurotropic effect of mast cells, with neurite contact ensuing when the intervening distance was less than 36±4 μm. Once formed, contacts were invariably maintained throughout the period of examination (up to 72 h), in contrast to YB2/0 or fibroblast contacts. We conclude that neurons selectively form and maintain connections with cells representative of rat connective tissue-type and mucosal mast cells in vitro. Similar interactions in vivo could promote nerve/mast cell contacts, which may allow bidirectional communication between the nervous and immune systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00318146
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  • 7
    Electronic Resource
    Electronic Resource
    Miscibility of sodium dodecyl sulfate and sodium decyl sulfate in the adsorbed film and micelle (1996)
    Springer
    Colloid & polymer science 274 (1996), S. 470-474 
    Details
    ISSN: 1435-1536
    Keywords: Miscibility ; adsorbed film ; micelle ; phase diagram ; ideal mixing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The interfacial tension of the aqueous solution of sodium dodecyl sulfate (SDS) and sodium decyl sulfate (SDeS) mixture against hexane was measured as a function of the total molality and composition of the surfactant mixture at 298.15 K under atmospheric pressure. The compositions of adsorbed film and micelle were evaluated numerically by applying the thermodynamic relations to the experimental results. These results were shown in the form of the phase diagrams of adsorption and micelle formation and compared with those of the aqueous solution of sodium perfluorooctanoate (SPFO) and SDeS mixture. It was found that the diagrams of SDS and SDeS system have swollen cigar shapes and are quite different from those of SPFO and SDeS system which show non-ideal mixing both in the adsorbed film and micelle. This finding was attributed to the fact that the interaction between fluorocarbon and hydrocarbon chains is weaker than that between hydrocarbon chains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00652470
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  • 8
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    Intestinal mucosal mast cells in normal and nematode-infected rat intestines are in intimate contact with peptidergic nerves. (1987)
    National Academy of Sciences
    Details
    Publication Date: 1987-05-01
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 9
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    Formation of contacts between mast cells and sympathetic neurons in vitro (1991)
    Springer
    Details
    Publication Date: 1991-07-01
    Print ISSN: 0302-766X
    Electronic ISSN: 1432-0878
    Topics: Biology , Medicine
    Published by Springer
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  • 10
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    Miscibility of sodium dodecyl sulfate and sodium decyl sulfate in the adsorbed film and micelle (1996)
    Springer
    Details
    Publication Date: 1996-05-01
    Print ISSN: 0372-820X
    Electronic ISSN: 1435-1536
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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