著者
吉村 勇哉 藤﨑 孝輔 山本 武範 篠原 康雄
出版者
公益社団法人 日本薬学会
雑誌
YAKUGAKU ZASSHI (ISSN:00316903)
巻号頁・発行日
vol.137, no.5, pp.581-587, 2017-05-01 (Released:2017-05-01)
参考文献数
16
被引用文献数
3 7

Magnesium oxide (MgO) tablets are widely used as laxatives in patients with constipation. Recently, the “Revision of Precautions on the Use of Magnesium Oxide” has been issued by the Japanese Pharmaceuticals and Medical Devices Agency, warning against the risk of hypermagnesemia with the use of MgO. However, the majority of physicians continue to administer MgO for constipation without adequately considering its safe use. In the present study, we performed two analyses using an identical lot of MgO tablets and evaluated the risk of hypermagnesemia. Approximately 90% of the MgO tablets dissolved within 120 min in dissolution testing; it was believed to form an absorbable state for magnesium. With orally administered MgO, 15% is absorbed in the body and 85% is excreted via the feces without being detected in pharmacokinetic analysis. Magnesium absorbed into the plasma demonstrated peak concentration 3 h after administration and was excreted via the urine within 48 h.
著者
篠原 康男 前田 正登
出版者
一般社団法人 日本体育学会
雑誌
体育学研究 (ISSN:04846710)
巻号頁・発行日
pp.15096, (Released:2016-08-29)
参考文献数
39
被引用文献数
1

This study aimed to clarify the composition of the phases (acceleration, full sprint, and velocity endurance) in the 50-m sprint as performed by elementary school students, focusing on changes in running velocity. The subjects were 169 boys and 178 girls in the first to sixth grades of elementary school, who performed a 50-m sprint from a standing start. Running velocity was measured using a laser distance meter, which was synchronized with a video camera that recorded the entire sprint. It was found that the running time of the total sprint was significantly shorter and that maximal velocity was significantly higher for higher-grade than for lower-grade students. The distances of the acceleration phase and full sprint phase were significantly longer for higher-grade than for lower-grade students, but there was no significant difference in the duration of these phases by grade. However, both the distance and duration of the velocity endurance phase were significantly shorter for higher-grade than for lower-grade students. Step length in the acceleration, full sprint, and velocity endurance phases was longer for higher-grade than for lower-grade students. However, step frequency at each phase tended to be almost equal or slightly lower for higher-grade than for lower-grade students. The SL index for higher-grade boys tended to be higher than for lower-grade boys. However, for girls, there was little difference in the SL index at each phase for second-grade students or above. Taken together, the results indicate that the velocity endurance phase comprises the majority of the 50-m sprint when performed by lower-grade students. However, for higher-grade students, the velocity endurance phase is shorter due to the relative increases in the acceleration and sprint phases. This suggests that the distance of the acceleration and full sprint phases affects the distance and duration of the velocity endurance phase.
著者
門脇 孝 齊藤 康 篠原 康雄 武田 健
出版者
公益社団法人日本薬学会
雑誌
ファルマシア (ISSN:00148601)
巻号頁・発行日
vol.36, no.9, pp.759-764, 2000-09-01

現在, 日本人の死亡原因のうち, 心臓病, 脳卒中など血管病といわれる病気の占める割合は極めて大きいものがある.肥満はこれらの血管病の他にも糖尿病など多くの生活習慣病のリスクファクターになっており, 肥満制御は21世紀の医療を考える上で必須の課題と思われる. 本日は3人の先生方に, 最近飛躍的に進んだといわれる肥満の分子機構に関する研究結果をもとに肥満と生活習慣病の関わり, 創薬への展望を語って戴いた.
著者
篠原 康男 前田 正登
出版者
一般社団法人 日本体育学会
雑誌
体育学研究 (ISSN:04846710)
巻号頁・発行日
pp.13007, (Released:2013-10-11)
参考文献数
35
被引用文献数
3

The forces applied to the starting blocks are an important aspect of a sprint start. For achieving the most effective start, however, the relationship between these forces and block clearance has not been clarified. In this study, an experiment was conducted with collegiate sprinters in order to elucidate this relationship. The 19 male participants performed a start dash from the blocks as in a typical sprint race, and the forces applied to the front and rear starting blocks, as well as to the ground during the first step, were measured with force plates. The following results were obtained. Based on the impulses applied to the starting blocks, the horizontal impulse component had a greater effect than the vertical impulse component at block clearance. Furthermore, at block clearance, the horizontal component of the impulse applied to the front block accounted for a large proportion of the total horizontal impulse applied to the starting blocks. However, there was a significant correlation between the horizontal component of the impulse applied to the rear block and the total horizontal impulse applied to the starting blocks. The horizontal component of the impulse was affected by the duration of force application to the blocks. Moreover, the horizontal component of the impulse applied to the starting blocks was unrelated to block placement. This indicates that the component was affected by the position of the sprinter relative to the front and rear blocks. Lastly, the horizontal impulse component at block clearance affected the sprint start until grounding of the first step, after which this relationship differed according to the starting strategy and grounding skill of individual participants.
著者
篠原 康男 上田 憲嗣 島崎 崇史
出版者
一般社団法人 日本体育学会
雑誌
日本体育学会大会予稿集 第70回(2019) (ISSN:24241946)
巻号頁・発行日
pp.83_3, 2019 (Released:2019-12-20)

学士課程における教養体育では、「体育」ではなく、「スポーツ」が科目名に含まれていることが多い(梶田ほか、2018)。これは、当該科目で扱うスポーツ種目に関して、ルールや技術だけでなく、その成り立ちをも含めた幅広い知識を学ぶことが期待されているからであろう。そのため、学士課程における教養体育とは、ただそのスポーツ種目を実践するだけでなく、自分たちが生きる社会とスポーツのかかわりを「学び、考える場」ともいえよう。そこで本研究では、自然科学・人文科学・社会科学など様々な観点からスポーツ種目を捉えたコラムを配布教材として作成・配布し、学生の教養体育での学びに与える効果を検討した。対象はR大学における「スポーツ方法実習Ⅰ」でバドミントンを選択した2クラスとし、コラムを配布する介入クラスと、コラムを配布しない非介入クラスに分けた。介入クラスに対しては、第1回目から第14回目の各授業内で「バドミントン×○○」というテーマのコラムを配布し、内容の解説を行った。これらのクラスに対し、授業の学習に関するものや身体活動量(IPAQ)、健康度と生活習慣に関するアンケートを実施し、コラムの配布効果を検討した。
著者
篠原 康雄 寺田 弘
出版者
一般社団法人 日本生物物理学会
雑誌
生物物理 (ISSN:05824052)
巻号頁・発行日
vol.28, no.3, pp.131-134, 1988-05-25 (Released:2009-05-25)
参考文献数
19

This paper deals with why the Pβ0-Pγ bond is cleaved specifically in the enzymic hydrolysis of ATP mediated by Mg2+. Mg2+ coordinates with the β-and γ-phosphoryl groups in such a way that it binds more strongly to the former. This asymmetric coordination weakens the bond where specific cleavage takes place in the enzyme catalyzed hydrolysis.
著者
篠原 康
出版者
筑波大学
雑誌
特別研究員奨励費
巻号頁・発行日
2012

極性半導体の例としてGaAsを対象にコヒーレントフォノンの生成過程を微視的な理論から明らかにした。また、SbとSiについてコヒーレントフォノンの観測過程のシミュレーションを行った。さらに研究の実施計画にはない点として、応用数理に基づく効率的な固有値解法をBogoribov-de Genness方程式に適用し、その有効性を実証した。GaAsに対して、これまでに開発した手法を適用し、その生成機構の第一原理シミュレーションを行った。これまでに明らかにしてきたSiやSbと同様、Raman過程に伴うコヒーレントフォノンの励起機構が第一原理的に再現されることを確認し、極性半導体のGaAsにおいても既存の理解が適用できることを示し、力の絶対値を評価した。さらに、極性半導体特有のメカニズムである瞬間的な表面電場の消失に伴う物理過程を特徴づけるBornの有効電荷の計算を行った。既存の研究では定常電場を含めた自由エネルギーを最小にするアプローチで第一原理的に計算されていたが、我々は電場を断熱的に加えることで定常電場を模したシミュレーションを行い、我々のアプローチで、理論の先行研究、および実験値と良い一致を見、本アプローチで定常電場がかかった状態をうまく記述できていることを示した。論文をまとめる為の計算結果は概ねとり終わっている。コヒーレントフォノンの生成過程の第一原理シミュレーションでは、Siに対しては十分な結果が得られたが、Sbについては、十分な精度を計算で達成するためには莫大な計算コストがかかることが判明したため、他の物質でのシミュレーションも合わせて論文にまとめる方針を検討している。前年度デュアルディグリープログラムで培った応用数理の知見を活かし、高効率固有値解法である櫻井杉浦法をBogoribov-de Genness方程式に適用し、高効率計算が出来る事を実証し、超大規模系の理論計算の可能性を示した。
著者
長井 健介 篠原 康浩 津留 英司 石野 まゆ子 鈴木 徹也
出版者
一般社団法人 日本鉄鋼協会
雑誌
鉄と鋼 (ISSN:00211575)
巻号頁・発行日
vol.98, no.6, pp.267-274, 2012 (Released:2012-05-31)
参考文献数
16
被引用文献数
1 3

It has been well known that anisotropy in yield stress and the work-hardening rate is induced by pre-strain and aging. However, such an origin has not been adequately understood. In the present study, stress-strain curves in different directions were investigated after 2% pre-straining and post-heat treatment at 150°C in ferritic steel. When the applied strain path was changed to the orthogonal direction of the pre-straining path, the re-yield stress was lowered and the work-hardening rate in the low plastic strain was increased. The heat treatment following 2% pre-straining caused an increase of the re-yield stress in the parallel direction to the pre-strain and caused no change on the re-yield stress in the orthogonal direction. The work-hardening rate was increased in both directions after the heating. Electron back scatter diffraction pattern (EBSP) analysis was also conducted to measure the kernel average misorientation (KAM) value, which corresponded to the density of the geometrically necessary dislocation, on each [hkl]-oriented family grain for the pre-strained and the post-heated materials. The EBSP results indicated that heterogeneous work-hardening behavior among the [hkl]-oriented family grains could strongly effect the anisotropy induced by strain path change and aging.
著者
篠原 康
巻号頁・発行日
2013

Thesis (Ph. D. in Science)--University of Tsukuba, (A), no. 6382, 2013.3.25