617 research outputs found
Satellite galaxies in the Illustris-1 simulation: anisotropic locations around relatively isolated hosts
We investigate the locations of satellite galaxies in the z = 0 redshift
slice of the hydrodynamical Illustris-1 simulation. As expected from previous
work, the satellites are distributed anisotropically in the plane of the sky,
with a preference for being located near the major axes of their hosts. Due to
misalignment of mass and light within the hosts, the degree of anisotropy is
considerably less when satellite locations are measured with respect to the
hosts' stellar surface mass density than when they are measured with respect to
the hosts' dark matter surface mass density. When measured with respect to the
hosts' dark matter surface mass density, the mean satellite location depends
strongly on host stellar mass and luminosity, with the satellites of the
faintest, least massive hosts showing the greatest anisotropy. When measured
with respect to the hosts' stellar surface mass density, the mean satellite
location is essentially independent of host stellar mass and luminosity. In
addition, the satellite locations are largely insensitive to the amount of
stellar mass used to define the hosts' stellar surface mass density, as long as
at least 50% to 70% of the hosts' total stellar mass is used. The satellite
locations are dependent upon the stellar masses of the satellites, with the
most massive satellites having the most anisotropic distributions.Comment: 12 pages, 10 figures, accepted for publication in MNRA
組織再生のためのゼラチンヒドロゲルからの成長因子の徐放化
京都大学0048新制・課程博士博士(工学)甲第7821号工博第1801号新制||工||1137(附属図書館)UT51-99-G415京都大学大学院工学研究科高分子化学専攻(主査)教授 筏 義人, 教授 砂本 順三, 教授 升田 利史郎学位規則第4条第1項該当Doctor of EngineeringKyoto UniversityDFA
Analysis of hexavalent chromium species in household articles by a laboratory-type X-ray absorption spectrometer
身の回りにあるクロムを含む多様な物品のクロムK 殻X 線吸収スペクトルを実験室系装置により測定し,XANES スペクトル解析により三価クロム種に対する六価種の定量分析を行った.高感度および高分解モードのスリット設定で測定されたXANES スペクトルの形状比較より,定量分析のために適した測定条件について論じた.全クロム中六価クロム種の定量はプリエッジピーク高さを用い,二種類の六価クロム化合物を用いても検量線の傾きの差は 1% であった.解析の結果,測定した三点の革製品およびクロム白雲母には六価クロム種は含まれていなかった.虹色光沢を呈したクロメート試料からは六価クロム種が検出された.Cr K-edge XANES spectra of various kinds of household articles such as leather products and chromate conversion coatings were recorded with a laboratory-type X-ray absorption spectrometer for quantitative analysis of hexavalent chromium species. The low energy resolution settings were found to be enough and suitable for the quantitative analyses with the spectrometer. The tiny but distinct preedge peak characteristics to hexavalent chromium species could be detected in XANES spectra of chromate conversion coatings with iridescent color, and the ratios of hexavalent to sum of hexa- and trivalent chromium species (Cr6 + /(Cr6 + + Cr3 + )) were calculated by the preedge peak height
Collective Excitations and Nonequilibrium Phase Transition in Dissipative Fermionic Superfluids
We predict a new mechanism to induce collective excitations of a fermionic
superfluid via sudden switch-on of two-body loss, for which we extend the BCS
theory to fully incorporate quantum jumps. We find that such dissipation
induces an amplitude oscillation of the superfluid order parameter accompanied
by chirped phase rotation, which highlights the role of dissipation in a
superfluid as a consequence of particle loss. We demonstrate that when the
dissipation is introduced to one of the two superfluids coupled via a Josephson
junction, it gives rise to a relative-phase mode analogous to the Leggett mode,
which can be detected from time evolution of the Josephson current. We find
that the coupled system exhibits a nonequilibrium dissipative phase transition
characterized by the vanishing dc Josephson current. The dissipation-induced
collective modes can be realized with ultracold fermionic atoms undergoing
inelastic collisions.Comment: 13 pages, 7 figure
ミニープレートの破折
Mini-plate fracture was found in a case of the bone grafting after the segmental mandibular excision, and a case of osteomyelitis in the radiographic follow-up examinations. It was emphasized that usefulness of mini-plate would be evaluated by modification in shape and number of mini-plate used for fixation or reconstruction
Clinical Features of Intestinal Behçet's Disease Associated with Myelodysplastic Syndrome and Trisomy 8
Several studies have identified a relationship between myelodysplastic syndrome and Behçetʼs disease (BD), especially intestinal BD, and trisomy 8 appears to play an important role in these disorders. Despite this, only few case reports or series have been reported in gastroenterology, meaning that endoscopic findings and characteristics of intestinal BD have not been clarified yet. In this report, we describe three cases of intestinal BD associated with myelodysplastic syndrome and trisomy 8, and discuss the clinical features and problems of these disorders from a gastroenterology perspective
Fermented persimmon extract (kaki-shibu) is useful as a standard for component analyses of persimmon phytobezoars
The definite diagnosis of persimmon phytobezoar (i.e., diospyrobezoar) is often accomplished by a component analysis using infrared spectroscopy. However, no studies have been conducted to investigate which substance is the best as a standard for the component analysis. Here we analyzed tannic acid, Japanese persimmon (kaki), fermented persimmon extract (kaki-shibu), conventional dried persimmon, and dried persimmon smoked in sulfur (ampo-kaki) by infrared spectroscopy to determine which would be optimal as a component analysis standard. The spectrum between 1,600 to 600cm-1 of a persimmon phytobezoar was quite similar to the spectrum of kaki-shibu rather than that of tannic acid. Consequently, we conclude that kaki-shibu should be used as a standard for infrared spectroscopy analyses of persimmon phytobezoars
Phosphatidylinositol phosphate 5-kinase Iβ recruits AP-2 to the plasma membrane and regulates rates of constitutive endocytosis
Overexpression of phosphatidylinositol phosphate 5-kinase (PIP5KI) isoforms α, β, or γ in CV-1 cells increased phosphatidylinositol 4,5-bisphosphate (PIP2) levels by 35, 180, and 0%, respectively. Endocytosis of transferrin receptors, association of AP-2 proteins with membranes, and the number of clathrin-coated pits at the plasma membrane increased when PIP2 increased. When expression of PIP5KIβ was inhibited with small interference RNA in HeLa cells, expression of PIP5KIα was also reduced slightly, but PIP5KIγ expression was increased. PIP2 levels and internalization of transferrin receptors dropped 50% in these cells; thus, PIP5KIγ could not compensate for loss of PIP5KIβ. When expression of PIP5KIα was reduced, expression of both PIP5KIβ and PIP5KIγ increased and PIP2 levels did not change. A similar increase of PIP5KIα and PIP5KIβ occurred when PIP5KIγ was inhibited. These results indicate that constitutive endocytosis in CV-1 and HeLa cells requires (and may be regulated by) PIP2 produced primarily by PIP5KIβ
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