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- 저자 : Jianwu Yan (검색결과 3 건)
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Lina Yang,Jianwu Ren,Yan Wang 한국원예학회 2014 Horticulture, Environment, and Biotechnology Vol.55 No.6
Three varieties of Damask rose named ‘Four Seasons’, ‘Celsiana’ and ‘Rose de Rescht’, were studied inBeijing in dry and frozen climate. The volatiles emitted from flowers were collected by dynamic headspace collectionmethod and were detected and identified via thermal-desorption cold trap/gas chromatography/mass spectrometer technique(TCT-GC/MS). The results revealed that 63, 68 and 55 species of individual compounds were found from ‘FourSeasons’, ‘Celsiana’ and ‘Rose de Rescht’, respectively. The results demonstrated that ‘Celsiana’ possessed most diversevolatile components; the relative abundance of terpenes was as much as 49%, whereas it was 20 and 40% for ‘FourSeasons’ and ‘Rose de Rescht’, respectively. It meant that the rose oil from flowers of ‘Celsiana’ might be of highquality. Therefore, industrial plantation of ‘Celsiana’ is probably reasonable in Beijing area.
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Yanan Jiang,Bing Chen,Yongbo Liu,Zhongyin Zhufu,Xin Yan,Xianglin Hou,Jianwu Dai,Qian Tan 한국조직공학과 재생의학회 2013 조직공학과 재생의학 Vol.10 No.4
Diabetes can impair neovascularization important for wound healing, and this study investigated the hypothesis that this effect can be reversed by an active provisional matrix. Here, a 3D collagen scaffold and uncultured adipose-derived SVFs were firstly utilized to construct a collagen-targeting system for wound healing in a diabetic porcine model. The diabetic porcine models were made by injected streptozocin (STZ) intravenously and removed full thickness skin from the dorsum. Each animal received four different samples: Group A (control groups, n=24), Group B (SVFs groups, n=24), Group C (scaffold groups, n=24), Group D (SVFs -scaffold groups, n=24). PBS was applied to the wounds in Group A. 1×105 SVFs suspended in PBS were sprayed on the wounds in Group B. Scaffolds only with PBS were covered on the wounds in Group C. Scaffolds with equal volume of cell suspension containing 1×105 SVFs were covered on the wounds in Group D. The healing rates were calculated and compared among the groups and the tissues of the wound were taken and evaluated for histological analysis. The diabetic wound treated with the SVFs -collagen scaffold showed a significant decrease in wound size, an increase of neovascularization and a maximum VEGF and bFGF expression in comparison with SVFs and scaffold alone. The SVFs-collagen scaffold accelerates wound healing since it stimulates higher capillary formation causes major proangiogenesis factors expression in diabetic pigs suffering from skin defects, suggesting this approach could have utility for diabetic wound healing.
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Ran Zhao,Bowen Wang,Shuying Cao,Wenmei Huang,Quanguo Lu,Jianwu Yan 한국자기학회 2018 Journal of Magnetics Vol.23 No.2
In this paper, we fabricated novel magnetostrictive composites by embedding <110>-oriented Tb-Dy-Ho-Fe fibers in an epoxy matrix. The magnetostrictive and magnetic properties (magnetostriction, magnetization, piezomagnetic coefficient and relative permeability) of the proposed composites were measured, analyzed, and compared to those of Tb0.29Dy0.48Ho0.23Fe1.9 alloy and Tb0.3Dy0.7Fe₂ continuous-fiber/epoxy composites. Tb0.29Dy0.48Ho0.23Fe1.9 continuous-fiber/epoxy composites have a saturation magnetostriction (λs) of 840 ppm and saturation magnetization (Ms) of 0.75 T. Their piezomagnetic coefficient exhibits a maximum value (8.2 μm/kA) at 19 kA/m. These proposed composites exhibit a large magnetostriction in high magnetic fields (> 400 kA/m) and a large relative permeability in low magnetic fields (< 100 kA/m). This result indicates that the given composites perform better than the Tb0.29Dy0.48Ho0.23Fe1.9 alloy and Tb0.3Dy0.7Fe₂ fiber/epoxy composites. Thus, the composites with characteristics of high sensitivity and large magnetostriction can be used in the field of ultrasonic sensing.
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