Strain differences in pubertal development of male rats’ penile reflexes

The penile reflexes in outbrcd Wistar, SD and inbred Fischer strain male rats aged from 23 to 62 days were observed for 15 min following sheath retraction. Plasma Luteinizing hormone (LH) and testosterone levels were measured at 23, 37, 51and 70 days of age by RIA. All Wistar and SD rats displayed erection: cups and flips before plasma LH and testosterone levels peaked at 51 days of age, whereas in Fischer strain males, erections, flips, but not cups began to be seen around peak levels of these hormones at 51 days of age. The pubertal development of penile reflexes in Fischer strain males was slower than that in Wistar and SD Stocks. The present study is the first to clarify the strain differences in pubertal development of male rats‘ penile reflexes

Copulatory behavior of male house musk shrews (Suncus murinus)

The copulatory behavior in male house musk shrews (Jic: SUN strain) aged 10-12 months was observed under the light (09:00-11:00) and dark (20:00-22:00) periods. The females of same strain were used as stimulus in copulatory behavior tests.Two-hour test sessions were recorded. All 14 males showed one ejaculation after a few intromissions within 2 hours. These values are similar to that of male guinea pigs. Comparing behavioral frequencies and latencies for males observed in thelight and dark periods, there were no significant differences between two groups. The present study is the first to clearly establish the pattern of copulatory behavior in male house musk shrews

Primary diffuse large B-cell lymphoma of the choroid plexus: A case report and review of the literature.

Background:Primary lymphomas in the choroid plexus are much less frequent than primary lymphomas in the brain parenchyma.Case Description:A 66-year-old male patient was referred to our department with a right intraventricular mass that had been diagnosed by biopsy at another hospital as anaplastic ependymoma. The patient underwent subtotal removal of the tumor via a transcortical inferior temporal gyrus approach. The mass was attached to the choroid plexus in the right atrium. Histopathological examination showed diffuse large B-cell lymphoma. Ophthalmological examination, blood tests, computed tomography of the whole body, and bone marrow biopsy did not show any other lesion, leading to the diagnosis of primary choroid plexus lymphoma. The patient underwent chemotherapy with three courses of high-dose methotrexate and one course of carboplatin and etoposide followed by whole-brain irradiation (1.8 Gy × 22).Conclusion:We present a rare case of primary choroid plexus lymphoma, which should be considered in the differential diagnosis of choroid plexus tumors

Prime Focus Spectrograph (PFS) for the Subaru Telescope: Overview, recent progress, and future perspectives

PFS (Prime Focus Spectrograph), a next generation facility instrument on the 8.2-meter Subaru Telescope, is a very wide-field, massively multiplexed, optical and near-infrared spectrograph. Exploiting the Subaru prime focus, 2394 reconfigurable fibers will be distributed over the 1.3 deg field of view. The spectrograph has been designed with 3 arms of blue, red, and near-infrared cameras to simultaneously observe spectra from 380nm to 1260nm in one exposure at a resolution of ~1.6-2.7A. An international collaboration is developing this instrument under the initiative of Kavli IPMU. The project is now going into the construction phase aiming at undertaking system integration in 2017-2018 and subsequently carrying out engineering operations in 2018-2019. This article gives an overview of the instrument, current project status and future paths forward.Comment: 17 pages, 10 figures. Proceeding of SPIE Astronomical Telescopes and Instrumentation 201

The Hyper Suprime-Cam SSP survey: Overview and survey design

Hyper Suprime-Cam (HSC) is a wide-field imaging camera on the prime focus of the 8.2-m Subaru telescope on the summit of Mauna Kea in Hawaii. A team of scientists from Japan, Taiwan, and Princeton University is using HSC to carry out a 300-night multi-band imaging survey of the high-latitude sky. The survey includes three layers: the Wide layer will cover 1400 deg2 in five broad bands (grizy), with a 5 σ point-source depth of r ≈ 26. The Deep layer covers a total of 26 deg2 in four fields, going roughly a magnitude fainter, while the UltraDeep layer goes almost a magnitude fainter still in two pointings of HSC (a total of 3.5 deg2). Here we describe the instrument, the science goals of the survey, and the survey strategy and data processing. This paper serves as an introduction to a special issue of the Publications of the Astronomical Society of Japan, which includes a large number of technical and scientific papers describing results from the early phases of this survey