Výsledky vyhledávání - "Masaaki Nagasawa"

Driving Characteristics of a Traveling Wave-Type Ultrasonic Motor with Three State PWM Control Adding a Standing Wave in Its Stator

Autor: Kenji Nishibori, Masaaki Nagasawa, Setsuya Kondo, Yoshihiko Nishiguchi

Publikováno v: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C. 72:1598-1604

An ultrasonic motor (USM) can produce a “free state” where the frictional force between the rotor and the stator diminishes when a standing wave is excited in the USM instead of a traveling wave. In this paper we propose a three state PWM drive m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::51582228d8e4e9194e7c903e71be9a66
https://doi.org/10.1299/kikaic.72.1598

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Driving Characteristics of Robot Hand with Fingers using Vibration-Type Ultrasonic Motors (3rd Report, Detection of Grasping Force by Decrease in Vibration and Influence of Disturbances)

Autor: Kenji Nishibori, Setsuya Kondo, Masaaki Nagasawa

Publikováno v: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C. 71:1327-1333

A vibration-type ultrasonic vibrator works as an ultrasonic motor when it is pressed slantwise against the surface of an object. In our previous paper we made a trail robot hand with three fingers that each works as an ultrasonic motor. This robot ha

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bb7a00c42bba609281c524b1948c4cd4
https://doi.org/10.1299/kikaic.71.1327

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Effects of ZNC-2381, a New Oral Compound, on Several Hepatic Injury Models and on Hepatocellular Apoptosis in Mice and Rats

Autor: Naoki Tsuzuike, Yoshihide Segawa, Yoshihiko Itokazu, Hiroyasu Nishioka, Yoshihisa Nakano, Naonori Inoue, Takashi Kanda, Masaaki Nagasawa, Tadashi Kobayashi, Takeshi Omata

Publikováno v: Journal of Pharmacy and Pharmacology. 52:531-538

The hepatoprotective effect of ZNC-2381 (1-(4-aminophenyl) methyl-3-(3-nitrophenyl)-1,3-dihydroimidazo[4,5-b]pyridine-2-one), a novel 2-one dihydroimidazopyridine derivative, has been evaluated in several experimental models of hepatic injury. In mic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1589919caf9c628b3aa181f485387577
https://doi.org/10.1211/0022357001774327

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Synthetic Studies on Halichondrin B, an Antitumor Polyether Macrolide Isolated from a Marine Sponge. 9. Synthesis of the C16-C36 Unit via Stereoselective Construction of the D and E Rings

Autor: Youji Sakurai, Kiyoshi Horita, Osamu Yonemitsu, Masaaki Nagasawa

Publikováno v: Chemical and Pharmaceutical Bulletin. 46:1199-1216

The C16-C36 unit of halichondrin B was stereoselectively synthesized via the aldol condensation of two C16-C26 esters with the previously synthesized C27-C36 aldehyde followed by E ring construction. The C16-C26 esters were prepared starting from (2S

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::408ad5b891881de6f452bc225cf44746
https://doi.org/10.1248/cpb.46.1199

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Synthetic studies of halichondrin B, an antitumor polyether macrolide isolated from a marine sponge. 8. Synthesis of the lactone part (C1C36) via horner-emmons coupling between C1C15 and C16C36 fragments and Yamaguchi lactonization

Autor: Kiyoshi Horita, Y. Sakurai, Masaaki Nagasawa, Jun'ichi Uenishi, Osamu Yonemitsu, Tatsuya Yamazaki, S. Hachiya

Publikováno v: Tetrahedron Letters. 38:8965-8968

The lactone part ( 2 ) of halichondrin B ( 1 ) was synthesized by Yamaguchi macrolactonization of the seco-acid ( 3 ), which was synthesized via coupling of C1C15( 4 ) with C16C36 ( 5 ), prepared through stereoselective construction of the E ri

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0dd8948f3a1ad298e83ed3afb522c014
https://doi.org/10.1016/s0040-4039(97)10364-1

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Synthetic Studies of Halichondrin B, an Antitumor Polyether Macrolide Isolated from a Marine Sponge. 7. Synthesis of Two C27-C36 Units via Construction of the F Ring and Completely Stereoselective C-Glycosylation Using Mixed Lewis Acids

Autor: Youji Sakurai, Osamu Yonemitsu, Masaaki Nagasawa, Kiyoshi Horita

Publikováno v: Chemical and Pharmaceutical Bulletin. 45:1558-1572

Two C27-C36 units of halichondrin B were synthesized starting from a C31-C34 alcohol, which was easily available from dimethyl L-tartrate, via construction of the F ring, methylation at the C31 position and C-glycosylation. These crucial reactions pr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::03a781ed70d3653b64eeb9c0c707282f
https://doi.org/10.1248/cpb.45.1558

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