Quantitative evaluation of common buckwheat (Fagopyrum esculentum Moench) kernel shape by elliptic Fourier descriptor     

Ryo Ohsawa  Tadahiro Tsutsumi  Hideyuki Uehara  Hyoji Namai  Seishi Ninomiya 《Euphytica》1998,101(2):175-183

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Studies of the New Herbicide KIH-6127. Part III. Synthesis and Structure–Activity Studies of Analogues of KIH-6127 against Barnyard Grass (Echinochloa oryzicola)*     

Masatoshi Tamaru  Naoshi Masuyama  Masahiro Sato  Fumiaki Takabe  Jun Inoue  Ryo Hanai 《Pest management science》1997,49(1):76-84

The previously evaluated prototype, methyl 6-acetyl-2-[(4,6-dimethoxypyrimidin-2-yl)oxy]benzoate, was modified by the introduction of an oximino group. Further extensive synthetic modifications were then made to the 6-alkyl moiety (R¹), the ester moiety (R²), the alkoxyimino moiety (R³), the bridge-atom (X) and the 4,6-disubstituted-pyrimidine moiety (A, B, Z). Structure–activity relationships of the synthesized compounds were studied by examining their herbicidal activity against Barnyard grass (Echinochloa oryzicola) in paddy rice at various growth stages, including pre-emergence. The novel herbicide methyl 2-[(4,6-dimethoxypyrimidin-2-yl)oxy]-6-[1-(methoxyimino)ethyl]benzoate, (KIH-6127) was found to be the most effective compound. The commercial development of this compound is currently in progress. © 1997 SCI.  相似文献   

Studies of the New Herbicide KIH-6127. Part II. Synthesis and Herbicidal Activity of 6-Acyl Pyrimidin-2-yl Salicylates and Analogues against Barnyard Grass     

Masatoshi Tamaru  Takayoshi Takehi  Naoshi Masuyama  Ryo Hanai 《Pest management science》1996,47(4):327-335

The method reported previously (Part I) was employed to prepare a variety of novel 6-acylsalicylates as key intermediates. 6-Acylpyrimidin-2-yl salicylates (2-acyl-6-[(4,6-disubstituted pyrimidin-2-yl)oxy]benzoate derivatives: Type 1), the closely related phthalide compounds (3-alkyl-7-[(4,6-dimethoxypyrimidin-2-yl)oxy]phthalide derivatives: Type 2) and the ketal derivatives of 2-acyl-6-[(4,6-dimethoxypyrimidin-2-yl)oxy]benzoates (Type 3) were synthesized and their herbicidal activities measured. Methyl 2-acetyl-6-[(4,6-dimethoxypyrimidin-2-yl)oxy]benzoate gave excellent control of barnyard grass with a promising profile as a prototype rice herbicide.  相似文献   

Impaired placentomal interferon signaling as the possible cause of retained fetal membrane in parturition-induced cows     

Ryo INABA  Ryouka KAWAHARA-MIKI  Akihisa SHINOZAWA  Taichi YASUHARA  Takashi FUJII  Keisuke KOYAMA  Michiko MURATA-OKUBO  Kousaku SOUMA  Hiroki HIRAYAMA 《The Journal of reproduction and development》2022,68(1):30

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Purification and characterization of glycerolipid acyl-hydrolase from the red alga Gracilaria vermiculophylla     

Muhammad I Illijas  Masaru Terasaki  Ryo Nakamura  Noriaki Iijima  Akihiko Hara  Nobuhiro Fusetani  Yutaka Itabashi 《Fisheries Science》2008,74(3):670-676

ABSTRACT:   A glycerolipid acyl-hydrolase was purified 19-fold with a yield of 11% from the prostaglandin-producing red alga Gracilaria vermiculophylla by ammonium sulfate precipitation, anion-exchange chromatoraphy and gel filtration chromatography. Sodium dodecylsulfate– polyacrylamide gel electrophoresis of the final preparation showed a single band corresponding to a molecular mass of 20 kDa, but Superdex 200 fast protein liquid chromatography exhibited a molecular mass of 40 kDa. Accordingly, it was suggested that the purified enzyme was a homodimer of a 20 kDa subunit. The optimal temperature and pH were 37°C and 7–8, respectively. The purified enzyme catalyzed hydrolysis of the acyl groups of both glycoglycerolipids and phospholipids, especially monogalactosyldiacylglycerol and phosphatidylcholine. These results suggest that the enzyme hydrolyze the membrane lipids of the alga to release various saturated and unsaturated fatty acids, including arachidonic acid as substrate for prostaglandin synthesis.  相似文献   

Migration and spawning behavior of the greater amberjack Seriola dumerili in eastern Taiwan     

Kazuki Tone  Yosuke Nakamura  Wei-Chuan Chiang  Hsin-Ming Yeh  Sheng-Tai Hsiao  Chun-Huei Li  Kazuyoshi Komeyama  Masanori Tomisaki  Takamasa Hasegawa  Takashi Sakamoto  Itsumi Nakamura  Yoshitaka Sakakura  Ryo Kawabe 《Fisheries Oceanography》2022,31(1):1-18

Greater amberjack (Seriola dumerili) is an important fishery resource with a circumglobal distribution from tropical to temperate waters. Here, we investigated the spawning migration and habitat utilization of S. dumerili in the East China Sea (ECS). Archival tags were attached to 22 adult fish to examine their horizontal and vertical movements and estimate the spawning ground. S. dumerili were captured and released in the coastal waters of eastern Taiwan on November of 2016 and 2017. Information from seven pop-up satellite archival tags and seven depth–temperature recorders was recovered. Almost all of the fish stayed in the Taiwanese exclusive economic zone. Most individuals moved from released site to the southern edge of the ECS and showed behavior associated with the topographic features in winter (November to December). These phenomena may be related to foraging and be driven by oceanographic features such as the seasonal monsoon and the Kuroshio. The fish then migrated to the south offshore area of Taiwan in January and February. During their southward migration, the fish experienced a slowly elevated water temperature regime (SETR), which is one of the environmental factors that induce final oocyte maturation. In the spawning season (February to April), tagged females exhibited continuous diel vertical movements (DVMs) after experiencing the SETR. These continuous DVMs were observed over a wide geographic range from north to south in the Kuroshio off eastern Taiwan. Our study demonstrated that the putative spawning ground of S. dumerili must extend further in a north–south direction than predicted in a previous study.  相似文献