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146 results on '"Shiba, Takuya"'

6. Lens thickness in atopic cataract: case–control study

Author

Iida, Masanobu, primary, Masuda, Yoichiro, additional, Sano, Kei, additional, Ichihara, Kosuke, additional, Komatsu, Koji, additional, Shiba, Takuya, additional, Iwaki, Hisaharu, additional, Oki, Kotaro, additional, Tatemichi, Masayuki, additional, and Nakano, Tadashi, additional

Published
2023
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36. Prefilled syringes and usability of ophthalmic viscosurgical devices

Author

Shiba,Takuya, Tsuneoka,Hiroshi, Shiba,Takuya, and Tsuneoka,Hiroshi

Abstract

Takuya Shiba, Hiroshi TsuneokaDepartment of Ophthalmology, Jikei University School of Medicine, Tokyo, JapanPurpose: To examine the influence of the configuration of prefilled syringes on the usability of ophthalmic viscosurgical devices (OVDs).Setting: Department of Ophthalmology, Jikei University School of Medicine, Tokyo, Japan.Design: Experimental study.Methods: The maximum force needed to extrude the whole OVD (extrusion force) was compared among viscous cohesive OVDs (OPEGAN Hi® 0.85 mL and Healon® 0.85 mL) and very low viscosity dispersive OVDs (OPEGAN® 0.6 mL and OPEGAN® 1.1 mL). Additionally, to exclude the influence of any differences between syringes of viscous cohesive OVDs on the extrusion force, empty syringes of the same configuration were refilled with the same products. In addition, the syringe inner surface and that of the piston attached to the tip of the plunger were measured.Results: The extrusion force of Healon 0.85 mL (3.28±0.19 kgf) was significantly (P<0.01) higher than that of OPEGAN Hi 0.85 mL (2.54±0.23 kgf). The inner syringe chamber for Healon 0.85 mL was vial shaped and had a built-in needle in the Luer tip, which was clearly different from OPEGAN Hi 0.85 mL. There were no significant differences in the extrusion force between refilled syringes. The extrusion force of OPEGAN 1.1 mL (3.44±0.12 kgf) was significantly (P<0.01) higher than that of OPEGAN 0.6 mL (1.63±0.06 kgf). The syringe of OPEGAN 1.1 mL was obviously bigger than that of OPEGAN 0.6 mL.Conclusion: It was confirmed that the configuration of the syringes is another determinant of the extrusion force and a factor related to the difference in usability among products that meet the same cohesive class.Keywords: configuration, syringe, extrusion force, viscous cohesive OVDs, low viscosity dispersive OVDs

Published
2014

50. Effects of alkaloids from fungal endophytes in grass- Epichloë associations on survival of the sorghum plant bug ( Stenotus rubrovittatus).

Author

Shiba, Takuya, Arakawa, Akira, and Sugawara, Koya

Subjects
ALKALOIDS, EPICHLOE, PLANT resistance to insects, ENDOPHYTIC fungi, MIRIDAE, SURVIVAL analysis (Biometry)
Abstract

Epichloë ( Neotyphodium) endophytes are symbiotic fungi in association with gramineous plants and produce a range of alkaloids that enhance the resistance of host plants to insect pests. N-formylloline, one of the Epichloë-produced alkaloids, is known to be toxic to some insects but not to mammals. Therefore, Epichloë-infected grasses with high N-formylloline concentrations are expected to reduce the population of some insect pests in meadows. To assess the adverse effects of N-formylloline on the survival of the sorghum plant bug ( Stenotus rubrovittatus) known as a major pest, artificial feeding of N-formylloline through feeding sachets was carried out. N-formylloline reduced the survival of S. rubrovittatus, even at 50 ppm, which was considerably lower than the concentrations in most Epichloë-infected grasses. The results suggest that N-formylloline in Epichloë-infected grasses can reduce the population of S. rubrovittatus in meadows. [ABSTRACT FROM AUTHOR]

Published
2015
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