著者
Timothy J. Suchomel George K. Beckham and Glenn A. Wright
出版者
Active Aging Research Center
雑誌
Journal of Trainology (ISSN:21865264)
巻号頁・発行日
vol.2, no.2, pp.19-22, 2013-09-25 (Released:2015-05-04)
参考文献数
14
被引用文献数
11 28

Objectives: To examine the impact of load on lower body kinetics during the jump shrug. Design: Randomized, repeated measures design. Methods: Fourteen men performed randomized sets of the jump shrug at relative loads of 30%, 45%, 65%, and 80% of their one repetition maximum hang clean (1RM-HC). A number of variables were obtained through analysis of the force-time data, which included peak force, peak velocity, peak power, force at peak power, and velocity at peak power. A series of one-way repeated measures ANOVA were used to compare the differences in peak force, peak velocity, peak power, force at peak power, and velocity at peak power between each load. Results: Statistical differences in peak velocity, peak power, force at peak power, and velocity at peak power existed between loads (p<0.001), while peak force trended toward statistical significance (p=0.060). The greatest peak velocity, peak power, and velocity at peak power occurred at 30% 1RM-HC. In addition the greatest peak force and force at peak power occurred at loads of 65% and 80% 1RM-HC, respectively. Conclusions: Velocity is the greatest contributing factor to peak power production during the jump shrug. Practitioners should prescribe specific loading schemes for the jump shrug to provide optimal training stimuli to their athletes based on the training goal: specifically, loads of 65% 1RM-HC or higher, loads of approximately 30-45% 1RM-HC, and loads of 30% 1RM-HC should be prescribed for improvements in peak force and force at peak power, peak power, and velocity and velocity at peak power, respectively.
著者
ラハマン G. K. M. M. 本山 直樹
出版者
日本農薬学会
雑誌
日本農薬学会誌 (ISSN:03851559)
巻号頁・発行日
vol.25, no.4, pp.387-391, 2000
参考文献数
21

有機リン殺虫剤クロルピリホスの畑土条件下での残留性を千葉と松戸の黒ボク土を用いて土壌の滅菌処理, 温度(15, 25, 35℃)や水分(20, 30, 40%)を変えて室内実験により研究した.土壌からメタノールで抽出後, 85%リン酸処理によって残留するクロルピリホスを遊離させ, 再びメタノールで抽出した.遊離したクロルピリホスは千葉土壌で最大18%, 松戸土壌で10%検出されたが, 長期間土壌中に残留した.土壌中の半減期は千葉土壌で28日, 松戸土壌で14日であり, 温度の上昇に伴って分解は速くなった.メタノールで抽出されない残留体は千葉>松戸であり, 有機炭素含量と正の相関を示し, 土壌有機物への吸着が示唆された.両土壌とも滅菌処理によって分解速度は遅くなったが, 遊離するクロルピリホスは酸処理によってあまり差がなかった.
著者
ラハマン G. K. M. M. 本山 直樹
出版者
Pesticide Science Society of Japan
雑誌
Journal of Pesticide Science (ISSN:1348589X)
巻号頁・発行日
vol.25, no.4, pp.387-391, 2000
被引用文献数
3

有機リン殺虫剤クロルピリホスの畑土条件下での残留性を千葉と松戸の黒ボク土を用いて土壌の滅菌処理, 温度 (15, 25, 35℃) や水分 (20, 30, 40%) を変えて室内実験により研究した. 土壌からメタノールで抽出後, 85%リン酸処理によって残留するクロルピリホスを遊離させ, 再びメタノールで抽出した. 遊離したクロルピリホスは千葉土壌で最大18%, 松戸土壌で10%検出されたが, 長期間土壌中に残留した. 土壌中の半減期は千葉土壌で28日, 松戸土壌で14日であり, 温度の上昇に伴って分解は速くなった. メタノールで抽出されない残留体は千葉>松戸であり, 有機炭素含量と正の相関を示し, 土壌有機物への吸着が示唆された. 両土壌とも滅菌処理によって分解速度は遅くなったが, 遊離するクロルピリホスは酸処理によってあまり差がなかった.
著者
Fujimoto A Tsurumi K Kawada R Murao T Takeuchi H Murai T Takahashi H
出版者
Springer Nature
雑誌
Translational Psychiatry (ISSN:21583188)
巻号頁・発行日
vol.7, 2017-04-04
被引用文献数
17

ギャンブル依存症の神経メカニズム --前頭葉の一部の活動や結合の低下でリスクの取り方の柔軟性に障害--. 京都大学プレスリリース. 2017-04-05.Gambling disorder (GD) is often considered as a problem of trait-like risk preference. However, the symptoms of GD cannot be fully understood by this trait view. In the present study, we hypothesized that GD patients also had problem with a flexible control of risk attitude (state-dependent strategy optimization), and aimed to investigate the mechanisms underlying abnormal risk-taking of GD. To address this issue, we tested GD patients without comorbidity (GD group: n=21) and age-matched healthy control participants (HC group: n=29) in a multi-step gambling task, in which participants needed to clear 'block quota' (required units to clear a block, 1000–7000 units) in 20 choices, and conducted a task-functional magnetic resonance imaging (fMRI) experiment. Behavioral analysis indeed revealed a less flexible risk-attitude change in the GD group; the GD group failed to avoid risky choice in a specific quota range (low-quota condition), in which risky strategy was not optimal to solve the quota. Accordingly, fMRI analysis highlighted diminished functioning of the dorsolateral prefrontal cortex (dlPFC), which has been heavily implicated in cognitive flexibility. To our knowledge, the present study provided the first empirical evidence of a deficit of state-dependent strategy optimization in GD. Focusing on flexible control of risk attitude under quota may contribute to a better understanding of the psychopathology of GDs.
著者
The ATLAS Collaboration Hara K. Kim S.H. Okawa H. Sato K. Ukegawa F.
出版者
Elsevier B.V.
雑誌
Physics letters. B (ISSN:03702693)
巻号頁・発行日
vol.765, pp.11-31, 2017-02
被引用文献数
23

A search for dark matter pair production in association with a Higgs boson decaying to a pair of bottom quarks is presented, using 3.2 fb−1 of pp collisions at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. The decay of the Higgs boson is reconstructed as a high-momentum b¯b system with either a pair of small-radius jets, or a single large-radius jet with substructure. The observed data are found to be consistent with the expected backgrounds. Results are interpreted using a simplified model with a Z′Z′ gauge boson mediating the interaction between dark matter and the Standard Model as well as a two-Higgs-doublet model containing an additional Z′Z′ boson which decays to a Standard Model Higgs boson and a new pseudoscalar Higgs boson, the latter decaying into a pair of dark matter particles.
著者
K. Yendo
出版者
The Botanical Society of Japan
雑誌
Shokubutsugaku Zasshi (ISSN:0006808X)
巻号頁・発行日
vol.17, no.196, pp.99-104, 1903 (Released:2007-05-24)
被引用文献数
2 4
著者
Takanori SHIGA Seiichi OKUNO Kazuyuki UCHIDA James K. CHAMBERS Hiroyuki NAKAYAMA
出版者
JAPANESE SOCIETY OF VETERINARY SCIENCE
雑誌
Journal of Veterinary Medical Science (ISSN:09167250)
巻号頁・発行日
pp.17-0459, (Released:2018-01-02)

An 8-year-old male Japanese Shiba exhibited muscle wasting and a stiff gait. A low-amplitude myotonic discharge was recorded by needle electromyography (EMG). A histopathological examination on a tru-cut biopsy sample from the muscle revealed myofiber size variations. Internal nuclei and cytoplasmic vacuoles were observed in many fibers. A type 1 fiber predominance and many hybrid type fibers were observed immunohistochemically. On the basis of these EMG and histopathological findings, myotonic dystrophy (DM) was suspected as tentative diagnosis. The cytoplasm around the vacuoles was immunopositive for cytochrome c, tom 20, and SOD-1, suggesting that these vacuoles might occur within mitochondria. Collectively, these results indicate that a mitochondrial abnormality partly play the role on the pathogenesis of present case.
著者
RABIE Raafat K. MATTER Mohamed K. KHAMIS Abd-El-Maksoud MASTAFA Mostafa M.
出版者
CROP SCIENCE SOCIETY OF JAPAN
雑誌
日本作物学会紀事 (ISSN:00111848)
巻号頁・発行日
vol.55, no.2, pp.155-161, 1986
被引用文献数
3

食用ソラマメの生育と窒素含有量および収量に対する土壌塩類, 窒素施肥の影響をポット条件下で調査した. 塩類濃度は, 乾土当り 0.18, 0.30, 0.45, 0.60%の4水準を設け, 0.18%のものを対照区とした. 窒素施肥については, 1ポット4 kgの土壌に対して窒素成分として 0, 25, 50, 75 mg添加の4水準を設けた. 得られた結果は次の通りである. 1. 乾物重, 窒素含有量, 子実収量, 茎重, 個体当り莢数, 個体当り子実蛋白量は, 塩類濃度0.30%は促進的であったが, その他の塩類濃度では, 濃度が高まるにつれて抑制的であった. 百粒重, 子実蛋白含有率に対しては, 対照区に比べて全ての塩類濃度が抑制的に作用した. 2. 個体当り子実収量, 百粒重並びに開花前期と英形成期における乾物重については, それぞれの平均値が窒素施肥によって増加した. 3. 植物体窒素含有量, 個体当り莢数並びに子実蛋白含有量は, 窒素施肥によって増加し, 莢充実期と成熟期では 50mgの窒素施用が最も促進的であった. 4. 開花前期と莢充実期の植物体乾物重は, 最終子実収量と有意の高い正の相関が認められた. 5. 子実生産の効率は, 窒素施用量の増加にともなって高まった. これらの結果から, a) 塩類濃度 0.45%は, ソラマメの生育にとって限界濃度であり, b) 根粒菌種子接種に併用する窒素施肥は, 可給態窒素含量の低い土壌で最大収量を得るために有効であると結論された.
著者
砂川 浩一 我那覇 伊昭 Sunakawa K. Ganaha I. 琉球農業試験場八重山支場
出版者
沖縄農業研究会
雑誌
沖縄農業 (ISSN:13441477)
巻号頁・発行日
vol.6, no.1, pp.1-16, 1967-05

夏植原料茎を基として,節位による節間長,節間重,Brixについて調査したがその概要は次のとおりである. 1.節位による節間伸長は第二次分けつ茎において最も大きくついで第一次分けつ茎,母茎の順であった.なお節間伸長量の大きくなる時期は母茎において2回(9~10月と4~5月)第一次,第二次茎においては各1回(4~5月)であった. 2.倒伏茎と立茎について節間伸長を比較すると第25節までは直立茎の伸長量が大で,それ以降は倒伏茎の方がまさっていた. 3.施肥量別の節間伸長量を比較すると大きな差はなかったが,標準区より2倍区において幾分優っていた. 4.節間重においても節間長と類似した傾向がみられたが,その差は節間長程でなかった.節間重の大きくなる時期も節間長と同時期であったがこれらの結果について,第一次分けつ茎を母茎より7~8節ずらし,第二次分けつ茎を第一次分けつ茎より5~6節ずらすと同一型のグラフとなり,第二次分けつ茎の生長量が最も大きく,次で第一次,母茎の順であった. 5.節位によるBrixの変異をみると分けつ茎別では第二次分けつ茎が第一次分けつ茎および母茎よりも高く,母茎と第一次茎の間には差はなかった.また倒伏別では直立茎が倒伏茎より若干優り,肥料別では2倍区より標準区が若干優っていたが大きな差はなかった. 6.登熟に伴うBrixの変化は各区とも,節位によって類似した傾向がみられた.
著者
Tohru Naruse Peter K. L. Ng
出版者
日本甲殻類学会
雑誌
Crustacean Research (ISSN:02873478)
巻号頁・発行日
vol.37, pp.1-13, 2008 (Released:2017-05-15)
参考文献数
21
被引用文献数
2 5

A new species of the genus Chiromantes Gistel, 1848 s. str. is described from the Ryukyu Islands. The new species is distinguished from another species of Chiromantes s. str., C. haematocheir (De Haan, 1833), by having proportionately longer and less setose ambulatory legs, a relatively flatter carapace, larger eyes, proportionally narrower front, relatively broader male sixth abdominal segment, less inflated male chela, and distinct colouration. The present study also regards Holometopus serenei as a junior subjective synonym of C. haematocheir.
著者
Kevin M. Carroll Kimitake Sato George K. Beckham Travis Triplett N. Cameron V. Griggs Michael H. Stone
出版者
Active Aging Research Center
雑誌
Journal of Trainology (ISSN:21865264)
巻号頁・発行日
vol.6, no.1, pp.9-12, 2017-01-26 (Released:2017-04-25)
参考文献数
16
被引用文献数
6

Objectives: The purpose of this study was to examine the relationship of velocities in the back squat between one repetition maximum (1RM) and submaximally loaded repetition maximum (RM) conditions, specifically in regard to what has been described as the minimal velocity threshold (MVT). The MVT describes a minimum concentric velocity that an individual must reach or surpass in order to successfully complete a repetition. Design: To test the presence of a MVT, participants were tested for 1RM and RM back squat ability. The mean concentric veloci ties (MCV) of the last successful repetition of each condition were then compared. Methods: Fourteen male participants familiar with the back squat volunteered to participate in the current study (age = 25.0 y ± 2.6, height = 178.9 cm ± 8.1, body mass = 88.2 kg ± 15.8). The mean concentric velocity (MCV) during the last successful repetition from each testing condition was considered for the comparison. Results: Results indicated a non-significant negative relationship of MCV between the 1RM and RM conditions (r = -0.135), no statistical difference between testing conditions (p = 0.266), with a small-to-moderate effect size (d = 0.468). Conclusions: The results of this study suggest that MVT should be further investigated to enhance its use in the practical setting. Additionally, coaches considering using a velocity-based approach for testing athletes should use data from either 1RM or RM conditions, but not both interchangeably. Coaches should be cautious when considering group averages or comparing velocity data between athletes, which may not be appropriate based on our results.