29 research outputs found
Flat-Band Ferromagnetism in Organic Polymers Designed by a Computer Simulation
By coupling a first-principles, spin-density functional calculation with an
exact diagonalization study of the Hubbard model, we have searched over various
functional groups for the best case for the flat-band ferromagnetism proposed
by R. Arita et al. [Phys. Rev. Lett. {\bf 88}, 127202 (2002)] in organic
polymers of five-membered rings. The original proposal (poly-aminotriazole) has
turned out to be the best case among the materials examined, where the reason
why this is so is identified here. We have also found that the ferromagnetism,
originally proposed for the half-filled flat band, is stable even when the band
filling is varied away from the half-filling. All these make the ferromagnetism
proposed here more experimentally inviting.Comment: 11 pages, 13figure
Uterine Carcinosarcoma in a 2-year-old Female Wistar Hannover GALAS Rat
Carcinosarcomas are rare tumors in humans as well as rats and most commonly occur in the
uterus. Recently, we observed a case of incidental carcinosarcoma of the uterus in a
female Wistar Hannover GALAS [BrlHan:WIST@ Jcl (GALAS)] rat at 2 years of age.
Histopathologically, the tumor was characterized by an admixture of malignant epithelial
and nonepithelial elements. The carcinomatous components represented a type of endometrial
carcinoma, consisting of glandular and solid proliferation of large-sized tumor cells.
Prominent mitoses and tumor cell invasion were observed. The sarcomatous components were
characterized by multifocal proliferation of severe atypical cells with cartilage matrix
and were diagnosed as chondrosarcoma. Transitions between carcinomatous and sarcomatous
components were observed, and many tumor cells in the solid lesion showed
immunohistochemical reactivity with both cytokeratin and vimentin. Based on these
findings, this tumor was diagnosed as a uterine carcinosarcoma. This is the first report
of uterine carcinosarcoma in Wistar Hannover GALAS [BrlHan:WIST@Jcl (GALAS)] rats
Gate-induced band ferromagnetism in an organic polymer
We propose that a chain of five-membered rings (polyaminotriazole) should be
ferromagnetic with an appropriate doping that is envisaged to be feasible with
an FET structure. The ferromagnetism is confirmed by a spin density functional
calculation, which also shows that ferromagnetism survives the Peierls
instability. We explain the magnetism in terms of Mielke and Tasaki's flat-band
ferromagnetism with the Hubbard model. This opens a new possibility of band
ferromagnetism in purely organic polymers.Comment: 4 pages, 7 figure
Effects of a trauma center on early mortality after trauma in a regional city in Japan: a population-based study
Background: Although the effects of the trauma center(TC) were researched in several studies, there have been few studies on changes in the regional mortality due to the implementation of a TC.An emergency medical center (EMC) and TC were implemented at Nagasaki University Hospital (NUH) for the first time in the Nagasaki medical region of Japan in April 2010 and October 2011, respectively, and they have cooperated with each other in treating trauma patients. The purpose of this study was to investigate the effects on the early mortality at population level of a TC working in cooperation with an EMC. Methods: This is a retrospective study using standardized regional data (ambulance service record) in Nagasaki medical region from April 2007 through March 2017. We included 19,045 trauma patients directly transported from the scene. The outcome measures were prognosis for one week. To examine the association between the implementation of the EMC and TC and mortality at a region, we fit adjusted logistic regression models. Results: The number of patients of each fiscal year increased from 1492 in 2007 to 2101 in 2016.The number of all patients transported to NUH decreased until 2009 to 70, but increased after implementation of the EMC and TC. Overall mortality of all patients in the region improved from 2.3% in 2007 to 1.0% in 2016.In multivariate logistic regression model, odds ratio of death was significantly smaller at 2013 and thereafter if the data from 2007 to 2011 was taken as reference. Conclusions: Implementation of the EMC and TC was associated with early mortality in trauma patients directly transported from the scene by ambulance. Our analysis suggested that the implementation of EMC and TC contributed to the improvement of the early mortality at a regional city with 500000 populations. Level of evidence: Level III
Induction and Secretion of RNA-degrading Enzymes by Phosphate Deficiency in Pholiota nameko
Induction and secretion of RNA-degrading enzymes by Phosphate deficiency in Pholiota nameko
Molecular Characterization of a Lipoxygenase from the Basidiomycete Mushroom Pleurotus ostreatus
Gene expression during Pi-deficiency in Pholiota nameko: accumulation of mRNAs for two transpoters
The ion beam sputtering facility at KURRI: Coatings for advanced neutron optical devices
We describe a film coating facility for the development of multilayer mirrors for use in neutron optical devices that handle slow neutron beams. Recently, we succeeded in fabricating a large neutron supermirror with high reflectivity using an ion beam sputtering system (KUR-IBS), as well as all neutron supermirrors in two neutron guide tubes at BL06 at J-PARC/MLF. We also realized a large flexible self-standing m=5 NiC/Ti supermirror and very small d-spacing (d=1.65 nm) multilayer sheets. In this paper, we present an overview of the performance and utility of non-magnetic neutron multilayer mirrors fabricated with the KUR-IB