岩手医科大学附属病院でインプラント治療のために施行した術前CT検査の臨床統計学的検討

The diagnosis of jaw bones using X-ray computed tomography (CT) is important to determine placement of dental implants. A Clinico-statistical study were made on 490 cases which applied preoperative dental mutiplannar reconstructing CT (dental MPR) imaging for dental implant treatment in Iwate Medical University Hospital, during a five-year period from 2002 to 2006. The following results were obtained: 1) The 490 cases consisted of 179 males and 311 females. They ranged in age from 16 to 80 years, the average age was 53.6 years old. 2) The largest number of cases were in their 50\u27s and, in most generations, there were more female cases than male. 3) similar cases have been increasing every year. 4) Most patients were referred from other clinics to our hospital. 5) Of the cases that underwent CT scanning more were mandible than maxilla. 6) Implantation prearranged region revealed a predominance of mandible in anterior teeth, and maxilla in molar teeth. 7) The cases that were using diagnostic surgical stents increased in the first three years, but were constant afterwards

In-situ mechanical weakness of subducting sediments beneath a plate boundary décollement in the Nankai Trough

© 2018, The Author(s). The study investigates the in-situ strength of sediments across a plate boundary décollement using drilling parameters recorded when a 1180-m-deep borehole was established during International Ocean Discovery Program (IODP) Expedition 370, Temperature-Limit of the Deep Biosphere off Muroto (T-Limit). Information of the in-situ strength of the shallow portion in/around a plate boundary fault zone is critical for understanding the development of accretionary prisms and of the décollement itself. Studies using seismic reflection surveys and scientific ocean drillings have recently revealed the existence of high pore pressure zones around frontal accretionary prisms, which may reduce the effective strength of the sediments. A direct measurement of in-situ strength by experiments, however, has not been executed due to the difficulty in estimating in-situ stress conditions. In this study, we derived a depth profile for the in-situ strength of a frontal accretionary prism across a décollement from drilling parameters using the recently established equivalent strength (EST) method. At site C0023, the toe of the accretionary prism area off Cape Muroto, Japan, the EST gradually increases with depth but undergoes a sudden change at ~ 800 mbsf, corresponding to the top of the subducting sediment. At this depth, directly below the décollement zone, the EST decreases from ~ 10 to 2 MPa, with a change in the baseline. This mechanically weak zone in the subducting sediments extends over 250 m (~ 800–1050 mbsf), corresponding to the zone where the fluid influx was discovered, and high-fluid pressure was suggested by previous seismic imaging observations. Although the origin of the fluids or absolute values of the strength remain unclear, our investigations support previous studies suggesting that elevated pore pressure beneath the décollement weakens the subducting sediments. [Figure not available: see fulltext.]

Mobility, Contacts, And The Formation Of Multi-Ethnic/Racial Empires Across The Pacific

My dissertation examines Japanese and American intellectual discourses, including discourses by Christian leaders, on the topic of Japanese transpacific migrations, and sets such discourses in conjunction with related Japanese migrant practices from the beginning of the twentieth century through World War II. I focus on how both Japanese and American intellectual discourses with regard to Japanese migration reflected keen interest in the integration of heterogeneous populations in both empires. In particular, I analyze the emphasis in these discourses on the multi-ethnic/racial character of the intellectuals' own nations and consider Japanese migrants' responses to such discourses. I argue that the Japanese transpacific migration is an important historical factor in the development of discourses on the broader nation formation in the twentieth century. My study bridges the fields of Japanese studies and American studies and reveals new points at which transnational studies of Japanese migrations and comparative studies of racism in the Japanese and American empires converge. Overall, my study illuminates not only the parallel mechanisms of Japanese and American imperial nation formations but also the role of transpacific Japanese migration as an important site of interaction between the two countries. Such an analysis has not, to the best of my knowledge, been undertaken in either Japanese studies or American studies. Thus, my thesis offers new perspectives on existing nationalized disciplines and articulates the critical potential of transpacific studies

Bacterial populations concomitant with Sclerotium rolfsii sclerotia in flooded soil, as estimated by 16S rRNA gene, PCR-DGGE and sequence analyses

Objective: The bacterial communities concomitant with sclerotia of Sclerotium rolfsii, the causal agent of soybean stem rot, were examined by using PCR-DGGE.Methodology and results: Fungal sclerotia were buried in soil amended with organic matter and incubated under flooded conditions for 15 or 30 days in a greenhouse and in the field. The recovered sclerotia were examined for their viability and their concomitant bacterial communities. The DGGE band patterns showed the largest bacterial diversity in samples from soil amended with rice straw or wheat bran and flooded for 30 days. In the greenhouse for instance, the diversity index from organic amendment under 30 day flooding was higher than 1.80, while for other treatments the index was less than 1.5. This trend was similar in the field experiment. There was a negative relationship between the diversity index from DGGE band patterns and sclerotial viability or disease incidence. Examination of the nucleotide sequences of the DGGE bands revealed that members of Clostridiaceae were dominant in the samples flooded for 30 days, whereas Oxalobacteraceae, Nocardiaceae, and Actinomycetaceae were major groups under unflooded conditions.Conclusion: This is the first report of the soil bacterial flora concomitant with sclerotia of S. rolfsii under flooded conditions.Keywords: bacterial community, diversity, PCR-DGGE, Sclerotium rolfsii, sequencing, soybea

Computational studies on prion proteins: effect of Ala(117)-->Val mutation.

Molecular dynamics calculations demonstrated the conformational change in the prion protein due to Ala(117)-->Val mutation, which is related to Gerstmann-Sträussler-Sheinker disease, one of the familial prion diseases. Three kinds of model structures of human and mouse prion proteins were examined: (model 1) nuclear magnetic resonance structures of human prion protein HuPrP (125-228) and mouse prion protein MoPrP (124-224), each having a globular domain consisting of three alpha-helices and an antiparallel beta-sheet; (model 2) extra peptides including Ala(117) (109-124 in HuPrP and 109-123 in MoPrP) plus the nuclear magnetic resonance structures of model 1; and (model 3) extra peptides including Val(117) (109-124 in HuPrP and 109-123 in MoPrP) plus the nuclear magnetic resonance structures of model 1. The results of molecular dynamics calculations indicated that the globular domains of models 1 and 2 were stable and that the extra peptide in model 2 tended to form a new alpha-helix. On the other hand, the globular domain of model 3 was unstable, and the beta-sheet region increased especially in HuPrP