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캐나다 Ontario 주 Coldwell 알카리 복합체의 반려암에 배태된 반려암질 페그마타이트에 관한 연구
이혜임,정지곤,Peter C. Jones 한국지구과학회 1989 韓國地球科學會誌 Vol.10 No.1
Coldwell alkaline complex adjacent to the north of Lake Superior in Ontario, Canada is an isolated plutonic body composed chiefly of syenite and gabbros and Archean metamorphic rocks intruded by above mentioned igneous rocks. A pegmatite swarm is developed in olivine gabbro, a member of the complex. Zonal distribution is found in most of pegmatites and is composed of three zones, that is, leucocratic fine-grained zone of anorthosite, melanocratic fine-grained zone of gabbronorite and pyroxenite and coarse-grained zone of gabbronorite. The mean grain size of the rock forming minerals in fine-grained zone is 0.27㎜ and that of coarse-grained zone 10.4㎜. An content of most plagioclases is in the range from An50 to An70 indicating that the pegmatite is mafic pegmatite. In a grain of plagioclase, An content decreases gradually from core to margin. Paragenetic sequence of main minerals in pegmatite is plagioclase, olivine, pyroxene, hornblende, biotite and opaque mineral from the earlier stage. Mineralogy in pegmatite is similar to that of the country rock, so it can be classified as simple and pure pegmatite. Fine-grained zone might be formed by rapid crystallization with high viscosity caused by rapid reduction in P_(H₂O) when coexisting vapor phase is suddenly released and raising the sotidus and liquidus temperatures abruptly. Coarse-grained zone is probably formed by high diffusion rate and low viscosity caused by depolymerization, formation of aqueous phase and decrease of solidus temperature. The rate of increase in viscosity caused by cooling of magma from the magmatic stage and high content of SiO₂ is ignorable compared with the rate of decrease in viscosity caused by concentration of water.
Super-Eddington Accretion in the <i>WISE</i>-selected Extremely Luminous Infrared Galaxy W2246−0526
Tsai, Chao-Wei,Eisenhardt, Peter R. M.,Jun, Hyunsung D.,Wu, Jingwen,Assef, Roberto J.,Blain, Andrew W.,Dí,az-Santos, Tanio,Jones, Suzy F.,Stern, Daniel,Wright, Edward L.,Yeh, Sherry C. C. American Astronomical Society 2018 The Astrophysical journal Vol.868 No.1
Kyle M. Hatton-Jones,Nicholas P. West,Mike W.C. Thang,Pin-Yen Chen,Peter Davoren,Allan W. Cripps,Amanda J. Cox 대한비만학회 2024 Journal of obesity & metabolic syndrome Vol.33 No.1
Background: The contributions of the gut microbiota to obesity and metabolic disease represent a potentially modifiable factor that may explain variation in risk between individuals. This study aimed to explore relationships among microbial composition and imputed functional attributes, a range of soluble metabolic and immune indices, and gene expression markers in males with or without evidence of metabolic dysregulation (MetDys). Methods: This case-control study included healthy males (n=15; 41.9±11.7 years; body mass index [BMI], 22.9±1.2 kg/m2) and males with evidence of MetDys (n=14; 46.6±10.0 years; BMI, 35.1±3.3 kg/m2) who provided blood and faecal samples for assessment of a range of metabolic and immune markers and microbial composition using 16S rRNA gene sequencing. Metagenomic functions were imputed from microbial sequence data for analysis. Results: In addition to elevated values in a range of traditional metabolic, adipokine and inflammatory indices in the MetDys group, 23 immunomodulatory genes were significantly altered in the MetDys group. Overall microbial diversity did not differ between groups; however, a trend for a higher relative abundance of the Bacteroidetes (P=0.06) and a lower relative abundance of the Verrucomicrobia (P=0.09) phyla was noted in the MetDys group. Using both family- and genera-level classifications, a partial least square discriminant analysis revealed unique microbial signatures between the groups. Conclusion: These findings confirm the need for ongoing investigations in human clinical cohorts to further resolve the relationships between the gut microbiota and metabolic and immune markers and risk for metabolic disease.
Chae, K.Y.,Ahn, S.,Ayres, A.,Bardayan, D.W.,Bey, A.,Greife, U.,Howard, M.E.,Jones, K.L.,Kozub, R.L.,Matoš,, M.,Moazen, B.H.,Nesaraja, C.D.,O’Malley, P.D.,Peters, W.A.,Pittman, S.T.,Smith, M.S. Elsevier 2018 Nuclear Instruments & Methods in Physics Research. Vol.900 No.-
<P><B>Abstract</B></P> <P>Direct measurements of ( α , p ) reactions of astrophysical interest with radioactive beams presents serious challenges because of the difficult nature of helium targets and the typical low intensities of the beams. To address this, a new technique has been developed for measurements of low-energy ( α , p ) reactions with heavy ion beams using an extended <SUP> 4 </SUP> He gas target and a newly developed gas recirculating system. The system was used to measure the <SUP> 4 </SUP> He(<SUP>19</SUP>F, <SUP> 1 </SUP> H)<SUP>22</SUP>Ne reaction as a demonstration. Excitation functions of the <SUP>19</SUP>F( α , p )<SUP>22</SUP>Ne and <SUP>19</SUP>F( α , <SUP> p ′ </SUP> )<SUP>22</SUP>Ne <SUP> ∗ </SUP> reactions were successfully measured to show the viability of this technique. Details of the approach and future plans are given.</P>