1.

論文(リポジトリ)

論文(リポジトリ)
Nakamura, Hideta ; Miyagi, Kazuya ; Otsuki, Mariko ; Higure, Yuuri ; Nishiyama, Naoya ; Kinjo, Takeshi ; Nakamatsu, Masashi ; Haranaga, Shusaku ; Tateyama, Masao ; Fujita, Jiro
出版情報: Internal Medicine.  59  pp.2945-2949,  2020-11-15.  The Japanese Society of Internal Medicine — 一般社団法人 日本内科学会
URL: http://hdl.handle.net/20.500.12000/47366
概要: Treatment with tocilizumab (TCZ) to block interleukin-6 (IL-6) signalling is predicted to mitigate cytokine release syndrome (CRS) caused by coronavirus disease 2019 (COVID-19). However, the adverse effects of TCZ on patients with COVID-19 remain unclear. We herein report a patient with COVID-19 treated with TCZ who developed acute hypertriglyceridaemia. Despite favipiravir treatment, acute respiratory distress syndrome developed in a 45-year-old patient with COVID-19; thus, TCZ was initiated. The triglyceride levels greatly increased after TCZ administration. Physicians should consider the negative impact of TCZ on the lipid profile in patients with COVID-19, although COVID-19-induced CRS itself may be an aggravating factor. 続きを見る
2.

論文(リポジトリ)

論文(リポジトリ)
Akamine, Kozue ; Mekaru, Keiko ; Gibo, Keiya ; Nagata, Chinatsu ; Nakamura, Rie ; Oishi, Sugiko ; Miyagi, Maho ; Heshiki, Chiaki ; Aoki, Yoichi
出版情報: Reproductive Medicine and Biology.  2020-10-25.  Wiley
URL: http://hdl.handle.net/20.500.12000/47491
概要: Purpose: To investigate impact of the one‐carbon metabolism (OCM) on oocyte maturity and embryo development. Methods: Th is prospective study analyzed 18 women who agreed to participate. We measured the OCM biomarkers’ concentrations including Vitamin B12 (VB12), folic acid (FA), and homocysteine (Hcy) in serum and follicular fluid (FF), and assessed their correlation. We also evaluated the influence of such OCM biomarker concentrations in mono‐FF on oocyte maturation, fertilization, embryo quality, and consequent pregnancy after embryo transfers. Results: All biomarkers showed a high concentration variability in different follicles of each woman, but their mean levels correlated with the serum levels. Among the 106 collected oocytes, 92 were mature, 59 were fertilized, and 16 yielded good‐quality embryos. We performed 26 single embryo transfers, and 7 patients achieved clinical pregnancies. VB12 concentration (FF) was significantly lower in fertilized than unfertilized oocytes by univariate analysis. In multivariate logistic analysis, a significant correlation was found between FA concentration (FF) <14.25 ng/mL and good‐quality embryos and between Hcy concentration (FF) <4.9 nmol/mL and clinical pregnancy. Conclusion: OCM in FF may affect fertilization, embryo quality, and clinical pregnancy. 続きを見る
3.

論文(リポジトリ)

論文(リポジトリ)
Nakagawa, Tessui ; Uesato, Hiroki ; Burrell, Anthony K. ; Ichikawa, Takayuki ; Miyaoka, Hiroki ; Davis, Benjamin L. ; Kojima, Yoshitsugu
出版情報: Energies.  13  2020-10-23.  MDPI
URL: http://hdl.handle.net/20.500.12000/47495
概要: “One-pot regeneration”, which is simple regneneration method of ammonia borane (AB) using hydrazine and liquid ammonia, enables conversion of AB from hexagonal boron nitride (h-BN) after milling hydrogenation. Solution ^<11>B-NMR revealed the presence of AB after NH_3/N_2H_4 treatment of milled h-BN (BNH_x) although the yield of AB was less than 5%. The conversion mechanism was clarified as B-H bonds on the h-BN surface created by ball-milling under hydrogen pressure have an ability to form AB, which was confirmed by Thermogravimetry-Residual Gas Analysis (TG-RGA) and Infrared (IR) analysis. The reaction routes are also the same as regeneration route of polyborazylene because intermediates of AB such as (B(NH_2)_3 and hydrazine borane were found by solution ^<11>B-NMR after soaking BNH_x in liquid NH_3 and hydrazine, respectively. Because of the fact that all reactions proceed on the h-BN surface and no reaction proceeds when neat h-BN is treated, breaking of B_3N_3 ring structure and then creation of B-H bond is the key issue to increase conversion yield of AB. 続きを見る
4.

論文(リポジトリ)

論文(リポジトリ)
大島, 千幸 ; 林, 幸希 ; 寺井, 純汰 ; 工藤, 翔里 ; Oshima, Kazuyuki ; Hayashi, Koki ; Terai, Junta ; Kudo, Shori
出版情報: Fauna Ryukyuana.  57  pp.1-11,  2020-10-02.  Ryukyu University Museum, Fujukan — 琉球大学資料館 (風樹館)
URL: http://hdl.handle.net/20.500.12000/46858
概要: This study records six Mantodea species from several islands in the Miyako Islands, including first records from some islands. Of the six Mantodea species, four species, i.e. Statilia nemoralis (Saussure, 1870), Tenodera fasciata (Olivier, 1792), T. angustipennis Saussure, 1869 and Hierodula patellifera (Audinet-Serville, 1839), are newly recorded from some adjacent islands of Miyako-jima Island, and two species, i.e. Mantis religiosa (Linnaeus, 1758) and Amantis nawai (Shiraki, 1908), were collected from previously recorded islands in the Miyako Is. Mantis religiosa and T. fasciata were primarily observed in open grasslands, and in contrast, T. angustipennis was mainly found around forest edges on Tarama-jima I. Few nymphs and an ootheca of S. nemoralis were found in grasslands on Ikema-jima I. and Kurima-jima I. Hierodula patellifera was the most abundant among mantis species during these surveys; a number of adults and a few nymphs of this species were observed in our expedition. For Amantis nawai, specimens of only the adult stage were observed, on the dried leaf litter of the forest floor on Miyako-jima I. In addition, three Mantodea species, M. religiosa, T. angustipennis and H. patellifera, were collected from UV-LED light trap set as a counterplan against Anomala albopilosa (Hope, 1839) (Coleoptera: Scarabaeidae) on Tarama-jima I. 続きを見る
5.

論文(リポジトリ)

論文(リポジトリ)
Yamasako, Junsuke ; Kuroda, Keita ; 山迫, 淳介 ; 黒田, 圭太
出版情報: Fauna Ryukyuana.  57  pp.13-15,  2020-10-02.  Ryukyu University Museum, Fujukan — 琉球大学資料館 (風樹館)
URL: http://hdl.handle.net/20.500.12000/46859
概要: Cophinopoda chinensis (Fabricius, 1794) is newly recorded from the Miyako Islands, the Ryukyus, Japan, with DNA barcode data.<br />東南アジアに広く分布するアオメアブCophinopoda chinensisを池間島,伊良部島,宮古島,来間島にて採集された標本に基づいて宮古諸島より初めて記録し,来間島の1個体より得たDNAバーコード配列の登録情報を記した. 続きを見る
6.

論文(リポジトリ)

論文(リポジトリ)
石田, 憲 ; Ishida, Akira
出版情報: Fauna Ryukyuana.  57  pp.17-19,  2020-10-02.  Ryukyu University Museum, Fujukan — 琉球大学資料館 (風樹館)
URL: http://hdl.handle.net/20.500.12000/46860
概要: Two sesarmid crab species, Circulium scandens (Ng & Liu, 2003), and Chiromantes ryukyuanum Naruse & Ng, 2008, are newly recorded from Kohama-jima Island, Ryukyu Archipelago, southwestern Japan.
7.

論文(リポジトリ)

論文(リポジトリ)
Okuno, Junji ; Naruse, Tohru ; 奥野, 淳兒 ; 成瀬, 貫
出版情報: Fauna Ryukyuana.  57  pp.21-26,  2020-10-02.  Ryukyu University Museum, Fujukan — 琉球大学資料館 (風樹館)
URL: http://hdl.handle.net/20.500.12000/46862
概要: A bizarre crab of the family Leucosiidae, Oreotlos pala Tan & Ng, 1996 is redescribed on the basis of four specimens , including three males and one female, collected from the Ryukyu Islands. This species was known only by the female holotype from Guam, the Mariana Islands. Our material from the Ryukyus enable us to describe the morphology of taxonomically important male characters (abdomen, telson, and gonopods) of this poorly known species for the first time. The assignment of the species to Oreotlos is fully confirmed.<br />久米島および宮古群島の伊良部島より採集された4個体の標本に基づき,コブシガニ科ツノカルイシコブシ属Oreotlos Ihle, 1918 のOreotlos pala Tan & Ng, 1996を再記載した.本種は,マリアナ諸島グアム島で採集された雌1個体に基づいて記載され,その後,川本・奥野(2003)による一般向けのガイドブックに久米島で撮影された個体の水中写真が掲載されているにすぎない稀種であった.本種の雄の形態はこれまで知られておらず,またホロタイプは鉗脚と歩脚を欠いているが,本研究の検討標本は原記載にも示されている頭胸甲背面の肝域後方,側方突出部,鰓域後方にそれぞれ1個大きく深いくぼみを有することにより,同種であると判断した.本種には標準和名が与えられていなかったため,頭胸甲背面に月面のクレーターを彷佛させる顕著なくぼみを有することから,ゲツメンカルイシコブシの新称を提唱する. 続きを見る
8.

学位論文(リポジトリ)

学位
Salatkiewicz, Michal Mateusz
出版情報: 2020-09-30.  琉球大学 — University of the Ryukyus
URL: http://hdl.handle.net/20.500.12000/47026
9.

論文(リポジトリ)

論文(リポジトリ)
Sinzato, Hotaka ; Zamami, Yu ; Kondo, Tsuyoshi
出版情報: Brain Sciences.  10  2020-09-27.  MDPI
URL: http://hdl.handle.net/20.500.12000/47028
概要: For simultaneous screening of mixed features (MF) by DSM-5 and mixed depression (MD) by Benazzi, useful symptoms were extracted from our 12-item dimensional scale for depressive mixed state (DMX-12). Subjects were 190 consecutive cases with major depressive episode (MDE) who visited our clinic. Associations between symptomatological combinations of the DMX-12 and MF or MD were analyzed using receiver operating characteristic (ROC). The rate of MF was 4.2% while that of MD was 22.6%. Eight symptoms (overreactivity, inner tension, racing/crowded thought, impulsivity, irritability, aggression, risk-taking behavior, and dysphoria) with their AUC > 0.6 for ROC curves were specially focused on distinguishing patients with MF or MD from non-mixed patients. By using these 8 symptoms, 40.5% of the overall patients were screened as positive at the same cut-off value (≥13) for both MD and MF. The AUC of ROC curve and sensitivity/specificity were well balanced together with sufficient negative predictive values. The abovementioned 8 symptoms seem to be helpful for primary screening and negative check of DMX with considerable severity during MDE. 続きを見る
10.

論文(リポジトリ)

論文(リポジトリ)
齋藤, 将人 ; Saito, Masato
出版情報: 電子情報通信学会技術研究報告.  120  pp.23-28,  2020-09-25.  電子情報通信学会 — THE INSTITUTE OF ELECTRONICS,INFORMATION AND COMMUNICATION ENGINEERS
URL: http://hdl.handle.net/20.500.12000/47205
概要: 筆者らは,これまで,Single-Input Multiple-Output (SIMO) や Multiple-Input Multiple-Output (MIMO)および大規模MIMOにおける受信アンテナのハードウェアコスト削減法とし てアンテナパターン多重 (Antenna Pattern Multiplexing; APM) 技術に着目して研究を行ってきた.本稿では,APMの原理について時変指向性利得として,周波数分割多重および符号分割多重に基づく周期波形を用いて説明を試み,単一のアンテナ系統から,複数の分離可能なアンテナ出力が得られることを示す.<br />We have been studied Antenna Pattern Multiplexing (APM) technique suitable for receivers of Single-Input Multiple-Output (SIMO), Multiple-Input Multiple-Output (MIMO), and massive MIMO systems. APM technique has potential to reduce the hardware cost of the receivers, for example, size of antenna, the number of required cables, cabling cost, calibration cost, maintenance cost, etc. In this paper, we try to explain the principle of APM with time-variable directional gain designed based on Frequency Division Multiplexing (FDM) and Code Division Multiplexing (CDM). Through the paper, we show how to obtain multiple distinguishable antenna outputs from a single Radio Frequency (RF) front-end. 続きを見る