Search

Your search keyword '"Adachi, Shinji"' showing total 564 results
Start Over Author "Adachi, Shinji"
564 results on '"Adachi, Shinji"'

3. Existence and asymptotic behavior of positive solutions for a class of locally superlinear Schr\'odinger equation

Author

Adachi, Shinji, Ikoma, Norihisa, and Watanabe, Tatsuya

Subjects
Mathematics - Analysis of PDEs, 35J20, 35B40, 35J61, 58E40
Abstract

This paper treats the existence of positive solutions of $-\Delta u + V(x) u = \lambda f(u)$ in $\mathbb{R}^N$. Here $N \geq 1$, $\lambda > 0$ is a parameter and $f(u)$ satisfies conditions only in a neighborhood of $u=0$. We shall show the existence of positive solutions with potential of trapping type or $\mathcal{G}$-symmetric potential where $\mathcal{G} \subset O(N)$. Our results extend previous results as well as we also study the asymptotic behavior of a family $(u_\lambda)_{\lambda \geq \lambda_0}$ of positive solutions as $\lambda \to \infty$., Comment: 29 pages

Published
2022
Full Text
View/download PDF

5. Artificial Maturation

Author

Adachi, Shinji, Horiuchi, Moemi, Tanaka, Toshiomi, Yoshizaki, Goro, Editor-in-Chief, Kaneko, Toyoji, Series Editor, Kurokura, Hisashi, Series Editor, Tokai, Tadashi, Series Editor, Tsukamoto, Katsumi, editor, Kuroki, Mari, editor, and Watanabe, Soichi, editor

Published
2023
Full Text
View/download PDF

8. A note on the uniqueness and the non-degeneracy of positive radial solutions for semilinear elliptic problems and its application

Author

Adachi, Shinji, Shibata, Masataka, and Watanabe, Tatsuya

Subjects
Mathematics - Analysis of PDEs, 35J61, 35A02, 35B05
Abstract

In this paper, we are concerned with the uniqueness and the non-degeneracy of positive radial solutions for a class of semilinear elliptic equations. Using detailed ODE analysis, we extend previous results to cases where nonlinear terms may have sublinear growth. As an application, we obtain the uniqueness and the non-degeneracy of ground states for modified Schr\"odinger equations.

Published
2016

16. Short- versus long-segment posterior spinal fusion with vertebroplasty for osteoporotic vertebral collapse with neurological impairment in thoracolumbar spine: a multicenter study

Author

Ishikawa, Yuya, Watanabe, Kei, Katsumi, Keiichi, Ohashi, Masayuki, Shibuya, Yohei, Izumi, Tomohiro, Hirano, Toru, Endo, Naoto, Kaito, Takashi, Yamashita, Tomoya, Fujiwara, Hiroyasu, Nagamoto, Yukitaka, Matsuoka, Yuji, Suzuki, Hidekazu, Nishimura, Hirosuke, Terai, Hidetomi, Tamai, Koji, Tagami, Atsushi, Yamada, Shuta, Adachi, Shinji, Yoshii, Toshitaka, Ushio, Shuta, Harimaya, Katsumi, Kawaguchi, Kenichi, Yokoyama, Nobuhiko, Oishi, Hidekazu, Doi, Toshiro, Kimura, Atsushi, Inoue, Hirokazu, Inoue, Gen, Miyagi, Masayuki, Saito, Wataru, Nakano, Atsushi, Sakai, Daisuke, Nukaga, Tadashi, Ikegami, Shota, Shimizu, Masayuki, Futatsugi, Toshimasa, Ohtori, Seiji, Furuya, Takeo, Orita, Sumihisa, Imagama, Shiro, Ando, Kei, Kobayashi, Kazuyoshi, Kiyasu, Katsuhito, Murakami, Hideki, Yoshioka, Katsuhito, Seki, Shoji, Hongo, Michio, Kakutani, Kenichiro, Yurube, Takashi, Aoki, Yasuchika, Oshima, Masashi, Takahata, Masahiko, Iwata, Akira, Endo, Hirooki, Abe, Tetsuya, Tsukanishi, Toshinori, Nakanishi, Kazuyoshi, Watanabe, Kota, Hikata, Tomohiro, Suzuki, Satoshi, Isogai, Norihiro, Okada, Eijiro, Funao, Haruki, Ueda, Seiji, Shiono, Yuta, Nojiri, Kenya, Hosogane, Naobumi, and Ishii, Ken

Published
2020
Full Text
View/download PDF

17. Effect of bisphosphonates or teriparatide on mechanical complications after posterior instrumented fusion for osteoporotic vertebral fracture: a multi-center retrospective study

Author

Kawabata, Atsuyuki, Yoshii, Toshitaka, Hirai, Takashi, Ushio, Shuta, Kaito, Takashi, Yamashita, Tomoya, Fujiwara, Hiroyasu, Nagamoto, Yukitaka, Matsuoka, Yuji, Suzuki, Hidekazu, Nishimura, Hirosuke, Terai, Hidetomi, Tamai, Koji, Tagami, Atsushi, Yamada, Syuta, Adachi, Shinji, Watanabe, Kei, Katsumi, Keiichi, Ohashi, Masayuki, Shibuya, Yohei, Harimaya, Katsumi, Kawaguchi, Kenichi, Yokoyama, Nobuhiko, Oishi, Hidekazu, Doi, Toshiro, Kimura, Atsushi, Inoue, Hirokazu, Inoue, Gen, Miyagi, Masayuki, Saito, Wataru, Nakano, Atsushi, Sakai, Daisuke, Nukaga, Tadashi, Ikegami, Shota, Shimizu, Masayuki, Futatsugi, Toshimasa, Ohtori, Seiji, Furuya, Takeo, Orita, Sumihisa, Imagama, Shiro, Ando, Kei, Kobayashi, Kazuyoshi, Kiyasu, Katsuhito, Murakami, Hideki, Yoshioka, Katsuhito, Seki, Shoji, Hongo, Michio, Kakutani, Kenichiro, Yurube, Takashi, Aoki, Yasuchika, Oshima, Masashi, Takahata, Masahiko, Iwata, Akira, Endo, Hirooki, Abe, Tetsuya, Tsukanishi, Toshinori, Nakanishi, Kazuyoshi, Watanabe, Kota, Hikata, Tomohiro, Suzuki, Satoshi, Isogai, Norihiro, Okada, Eijiro, Funao, Haruki, Ueda, Seiji, Shiono, Yuta, Nojiri, Kenya, Hosogane, Naobumi, and Ishii, Ken

Published
2020
Full Text
View/download PDF

23. Surgical outcomes of spinal fusion for osteoporotic thoracolumbar vertebral fractures in patients with Parkinson’s disease: what is the impact of Parkinson’s disease on surgical outcome?

Author

Watanabe, Kei, Katsumi, Keiichi, Ohashi, Masayuki, Shibuya, Yohei, Izumi, Tomohiro, Hirano, Toru, Endo, Naoto, Kaito, Takashi, Yamashita, Tomoya, Fujiwara, Hiroyasu, Nagamoto, Yukitaka, Matsuoka, Yuji, Suzuki, Hidekazu, Nishimura, Hirosuke, Terai, Hidetomi, Tamai, Koji, Tagami, Atsushi, Yamada, Syuta, Adachi, Shinji, Yoshii, Toshitaka, Ushio, Shuta, Harimaya, Katsumi, Kawaguchi, Kenichi, Yokoyama, Nobuhiko, Oishi, Hidekazu, Doi, Toshiro, Kimura, Atsushi, Inoue, Hirokazu, Inoue, Gen, Miyagi, Masayuki, Saito, Wataru, Nakano, Atsushi, Sakai, Daisuke, Nukaga, Tadashi, Ikegami, Shota, Shimizu, Masayuki, Futatsugi, Toshimasa, Ohtori, Seiji, Furuya, Takeo, Orita, Sumihisa, Imagama, Shiro, Ando, Kei, Kobayashi, Kazuyoshi, Kiyasu, Katsuhito, Murakami, Hideki, Yoshioka, Katsuhito, Seki, Shoji, Hongo, Michio, Kakutani, Kenichiro, Yurube, Takashi, Aoki, Yasuchika, Oshima, Masashi, Takahata, Masahiko, Iwata, Akira, Endo, Hirooki, Abe, Tetsuya, Tsukanishi, Toshinori, Nakanishi, Kazuyoshi, Watanabe, Kota, Hikata, Tomohiro, Suzuki, Satoshi, Isogai, Norihiro, Okada, Eijiro, Funao, Haruki, Ueda, Seiji, Shiono, Yuta, Nojiri, Kenya, Hosogane, Naobumi, and Ishii, Ken

Published
2019
Full Text
View/download PDF

24. Effect of low body mass index on clinical recovery after fusion surgery for osteoporotic vertebral fracture: A retrospective, multicenter study of 237 cases

Author

Inoue, Gen, primary, Miyagi, Masayuki, additional, Saito, Wataru, additional, Shirasawa, Eiki, additional, Uchida, Kentaro, additional, Hosogane, Naobumi, additional, Watanabe, Kei, additional, Katsumi, Keiichi, additional, Kaito, Takashi, additional, Yamashita, Tomoya, additional, Fujiwara, Hiroyasu, additional, Nagamoto, Yukitaka, additional, Nojiri, Kenya, additional, Suzuki, Satoshi, additional, Okada, Eijiro, additional, Ueda, Seiji, additional, Hikata, Tomohiro, additional, Shiono, Yuta, additional, Watanabe, Kota, additional, Terai, Hidetomi, additional, Tamai, Koji, additional, Matsuoka, Yuji, additional, Suzuki, Hidekazu, additional, Nishimura, Hirosuke, additional, Tagami, Atsushi, additional, Yamada, Shuta, additional, Adachi, Shinji, additional, Ohtori, Seiji, additional, Furuya, Takeo, additional, Orita, Sumihisa, additional, Inage, Kazuhide, additional, Yoshii, Toshitaka, additional, Ushio, Shuta, additional, Funao, Haruki, additional, Isogai, Norihiro, additional, Harimaya, Katsumi, additional, Okada, Seiji, additional, Kawaguchi, Kenichi, additional, Yokoyama, Nobuhiko, additional, Oishi, Hidekazu, additional, Doi, Toshio, additional, Kiyasu, Katsuhito, additional, Imagama, Shiro, additional, Ando, Kei, additional, Kobayashi, Kazuyoshi, additional, Sakai, Daisuke, additional, Tanaka, Masahiro, additional, Kimura, Atsushi, additional, Inoue, Hirokazu, additional, Nakano, Atsushi, additional, Ikegami, Shota, additional, Shimizu, Masayuki, additional, Futatsugi, Toshimasa, additional, Kakutani, Kenichiro, additional, Yurube, Takashi, additional, Nakanishi, Kazuyoshi, additional, Oshima, Masashi, additional, Uei, Hiroshi, additional, Aoki, Yasuchika, additional, Takahata, Masahiko, additional, Iwata, Akira, additional, Endo, Hirooki, additional, Seki, Shoji, additional, Murakami, Hideki, additional, Kato, Satoshi, additional, Yoshioka, Katsuhito, additional, Hongo, Michio, additional, Abe, Tetsuya, additional, Tsukanishi, Toshinori, additional, Takaso, Masashi, additional, and Ishii, Ken, additional

Published
2022
Full Text
View/download PDF

33. Morphological and Molecular Gonadal Sex Differentiation in the Wild Japanese eel Anguilla japonica

Author

Horiuchi, Moemi, Hagihara, Seishi, Kume, Manabu, Chushi, Daichi, Hasegawa, Yuya, Itakura, Hikaru, Yamashita, Yoh, Adachi, Shinji, Ijiri, Shigeho, Horiuchi, Moemi, Hagihara, Seishi, Kume, Manabu, Chushi, Daichi, Hasegawa, Yuya, Itakura, Hikaru, Yamashita, Yoh, Adachi, Shinji, and Ijiri, Shigeho

Abstract

Most cultured Japanese eels (Anguilla japonica) show male sex differentiation; however, natural gonadal sex differentiation has not been evaluated. In this study, this process was characterized in wild eels. Differentiated ovaries and testes were observed after the eels grew to 320 and 300 mm in total length, respectively. The youngest ovary and testis appeared at 3 and 4 years old, respectively; however, undifferentiated gonads were found up to 7 years, suggesting that sex differentiation was triggered by growth rather than aging. gsdf, amh, foxl2b and foxl3b were highly expressed in the testes, whereas figla, sox3, foxn5, zar1, and zp3 were highly expressed in the ovaries. The expression of cyp19a1a and foxl2a did not differ significantly between the testis and ovary. In the ovaries, the cyp19a1a and foxl2a levels were highest in the early stages, suggesting that their function is limited to early ovarian differentiation. The foxn5, zar1 and zp3 levels tended to increase in the later stages, suggesting that they function after the initiation of ovarian differentiation. In undifferentiated gonads, dimorphic gene expression was not observed, suggesting that the molecular sex differentiation phase is short and difficult to detect. These findings provide the first demonstration of the whole course of natural gonadal sex differentiation in eels at molecular and morphological levels.

Published
2022

34. Changes in Ovulation-Related Gene Expression during Induced Ovulation in the Amur Sturgeon (Acipenser schrenckii) Ovarian Follicles

Author

Surugaya, Ryohei, Hasegawa, Yuya, Adachi, Shinji, Ijiri, Shigeho, Surugaya, Ryohei, Hasegawa, Yuya, Adachi, Shinji, and Ijiri, Shigeho

Abstract

The luteinizing hormone (LH) and maturation-inducing steroids (MIS), such as 17 alpha,20 beta-dihydroxy-4-pregnen-3-one, regulate the final oocyte maturation in teleosts. Oocyte maturational competence (OMC) and ovulatory competence measure the sensitivity to MIS for oocyte maturation and ovulation, respectively. However, the molecular mechanisms underlying the acquisition of ovulatory competence remain unknown. Sturgeons are an excellent research model for investigating these mechanisms. We examined the seasonal profiles of OMC and ovulatory competence in vitro and the expression of 17 ovulation-related gene candidates using quantitative PCR in Amur sturgeon ovarian follicles. The ovulatory competence was induced by the LH-releasing hormone analog (LHRHa) priming injection after acquiring the OMC, which was spontaneously induced in spring or autumn. Seven genes, including the tissue-type plasminogen activator (plat), were enhanced following the LHRHa priming injection in ovarian follicles sampled from anovulated and ovulated fish. The activin receptor type 1 (acvr1) and prostaglandin G/H synthase 2 (ptgs2) were only upregulated in ovulated fish. Our results suggest that plat/plasmin and prostaglandin (PG)/PG receptor systems are essential for sturgeon ovulation, similar to other vertebrates. Notably, successful ovulation depends on a sufficient PG synthesis, and mediators activating the PG/PG receptor system are essential for acquiring the ovulatory competence. We provide the first report of ovulation-related gene alterations in the ovarian follicles of Amur sturgeons.

Published
2022

35. Regulation of 17 alpha-Hydroxyprogesterone Production during Induced Oocyte Maturation and Ovulation in Amur Sturgeon (Acipenser schrenckii)

Author

Hasegawa, Yuya, Surugaya, Ryohei, Adachi, Shinji, Ijiri, Shigeho, Hasegawa, Yuya, Surugaya, Ryohei, Adachi, Shinji, and Ijiri, Shigeho

Abstract

In several teleosts, 17 alpha, 20 beta-dihydroxy-4-pregnen-3-one (DHP) has been identified as a maturation-inducing steroid. DHP is synthesized from 17 alpha-hydroxyprogesterone (17OHP) by 17 beta-hydroxysteroid dehydrogenase type 12-like (hsd17b12L). Along with 3 beta-hydroxysteroid dehydrogenase/& UDelta;5-4 isomerase (3 beta-HSD), 17 alpha-hydroxylase and C17-20 lyase are associated with 17OHP production. This study aimed to determine the roles of Amur sturgeon hsd3b, P450c17-I (cyp17a1), and P450c17-II (cyp17a2) in 17OHP production and to examine their enzyme activity and mRNA expression pattern during oocyte maturation. In the sturgeons used in this study, hsd3b encoded 3 beta-HSD, cyp17a1 catalyzed 17 alpha-hydroxylase production with C17-20 lyase activity, and cyp17a2 processed 17 alpha-hydroxylase activity alone. In the ovarian follicles of individuals that underwent induced ovulation, hsd3b mRNA levels increased rapidly, cyp17a1 expression was downregulated, and cyp17a2 expression was upregulated during oocyte maturation. Finally, an in vitro study revealed that salmon pituitary extract (SPE) stimulation rapidly induced hsd3b expression, whereas cyp17a1 expression was downregulated. In vitro, cyp17a2 expression did not rapidly increase with SPE stimulation. This rapid upregulation of hsd3b during oocyte maturation was first observed in teleosts. It was suggested that hsd17b12L expression is upregulated after 17OHP production, which is regulated by hsd3b, cyp17a1, and cyp17a2, resulting in DHP production.

Published
2022

40. Morphological and physiological studies on sex change in tropical fish: Sexual plasticity of the ovaries of hermaphroditic and gonochoristic fish

Author

Nakamura, Masaru, primary, Nozu, Ryo, additional, Nakamura, Shigeo, additional, Higa, Mikihiko, additional, Bhandari, Ramji K, additional, Kobayashi, Yasuhisa, additional, Horiguchi, Ryo, additional, Komatsu, Toru, additional, Kojima, Yutaka, additional, Murata, Ryosuke, additional, Soyano, Kiyoshi, additional, Ogawa, Satoshi, additional, Hirai, Toshiaki, additional, Matsubara, Hajime, additional, Tokumoto, Toshinobu, additional, Kobayashi, Tohru, additional, Kagawa, Hirohiko, additional, Adachi, Shinji, additional, Yamauchi, Kohei, additional, and Nagahama, Yoshitaka, additional

Published
2022
Full Text
View/download PDF

44. Properties of collagen extracted from Amur sturgeon Acipenser schrenckii and assessment of collagen fibrils in vitro

Author

Zhang, Xi, Adachi, Shinji, Ura, Kazuhiro, and Takagi, Yasuaki

Subjects
Collagen fibril, Biochemical characteristics, Gene
Abstract

The objective of this study was to assess the nature of the collagens from the Amur sturgeon to determine its possibility as a potential collagen source for biomedical applications. From a sturgeon (1.22 kg), 6.0 g (dry wt) of skin collagen (SC), 4.1 g of swim bladder collagen (SBC), and 0.4 g of notochord collagen (NC) were obtained. SC and SBC were characterized as type I, and NC as type II collagen. Denaturation temperatures of SC, SBC, and NC were calculated as 28.5, 30.5, and 33.5 °C, respectively. Gene expression of the type I procollagen α2 chain of Amur sturgeon (ascol1a2) was specifically higher than ascol1a1 expression in the swim bladder, suggesting a unique composition of α chains in this organ. SC and SBC had better abilities of fibril formation with unique higher-order structures compared with porcine type I collagen. The maximum transition temperature (Tm) of reassembled fibrils formed in a buffer solution containing NaCl at 0 and 140 mM was 34.4 °C and 38.9 °C in SC, and 40.1 °C and 40.7 °C in SBC, respectively. These characteristic features suggested that sturgeon collagens could be used in the biomedical industries in future applications.

Published
2019

50. Additional file 1 of Effect of bisphosphonates or teriparatide on mechanical complications after posterior instrumented fusion for osteoporotic vertebral fracture: a multi-center retrospective study

Author

Atsuyuki Kawabata, Toshitaka Yoshii, Hirai, Takashi, Shuta Ushio, Kaito, Takashi, Yamashita, Tomoya, Fujiwara, Hiroyasu, Yukitaka Nagamoto, Matsuoka, Yuji, Suzuki, Hidekazu, Hirosuke Nishimura, Hidetomi Terai, Tamai, Koji, Tagami, Atsushi, Syuta Yamada, Adachi, Shinji, Watanabe, Kei, Katsumi, Keiichi, Ohashi, Masayuki, Shibuya, Yohei, Harimaya, Katsumi, Kawaguchi, Kenichi, Yokoyama, Nobuhiko, Oishi, Hidekazu, Doi, Toshiro, Kimura, Atsushi, Inoue, Hirokazu, Inoue, Miyagi, Masayuki, Saito, Wataru, Nakano, Atsushi, Sakai, Daisuke, Nukaga, Tadashi, Ikegami, Shota, Shimizu, Masayuki, Futatsugi, Toshimasa, Ohtori, Seiji, Furuya, Takeo, Sumihisa Orita, Imagama, Shiro, Ando, Kei, Kobayashi, Kazuyoshi, Kiyasu, Katsuhito, Murakami, Hideki, Yoshioka, Katsuhito, Seki, Shoji, Hongo, Michio, Kakutani, Kenichiro, Yurube, Takashi, Yasuchika Aoki, Oshima, Masashi, Takahata, Masahiko, Iwata, Akira, Hirooki Endo, Abe, Tetsuya, Tsukanishi, Toshinori, Nakanishi, Kazuyoshi, Watanabe, Kota, Hikata, Tomohiro, Suzuki, Satoshi, Isogai, Norihiro, Eijiro Okada, Funao, Haruki, Ueda, Seiji, Shiono, Yuta, Nojiri, Kenya, Naobumi Hosogane, and Ishii, Ken

Subjects
musculoskeletal diseases, surgical procedures, operative, musculoskeletal system, humanities
Abstract

Additional file 1. Modified Japanese Orthopaedic Association (JOA) scoring system for lumbar function.

Published
2020
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results