http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Byungkwan Lee,Minh Duy Pham,Hyunseung Hwang,Inbae Jang,Changhoo Chun 한국원예학회 2021 원예과학기술지 Vol.39 No.2
To design a novel plug tray for ginseng seedling production, the effects of cell height and diameter, which determine root-zone volume, on growth and morphology of ginseng seedlings were investigated. Stratified seeds of the cultivar ‘Chunpoong’ were sown into containers with different cell heights (150, 200, 250, and 300 mm) with a diameter of 50 mm, denoted as H150, H200, H250, and H300, and different cell diameters (15, 20, 30, 50, and 75 mm) with a height of 200 mm, denoted as D15, D20, D30, D50, and D75, and filled with commercial growing media. Seedlings were then grown for 20 weeks in an ebb-and-flow subirrigation system installed in a plant factory with artificial light. Fresh and dry weights, length of roots, and leaf area increased as the cell height increased up to 300 mm. Length, fresh and dry weights of both shoots and roots, root diameter, and leaf area all increased as the cell diameter increased up to 30 mm. The root diameter was not significantly different between D30 and D75, though the roots had more space to expand. A further increase in cell height and diameter beyond H200 or D30 was not effective at increasing plant growth. The roots of ginseng seedlings were long and thick in the cells with a height of 200 mm and diameter of 30 mm. As a result, a novel plug tray was developed with a height and diameter of 200 mm and 30 mm, respectively, resulting in a root volume of 141.37 mL and planting density of 1,156 seedlings/㎡(9 ㎠/plants).
Volatile Compositions of Different Ginseng Cultivars under Different Cultivation Years
Yejin Kim,Jeehye Sung,Jung-Woo Lee,Inbae Jang,Ick-Hyun Jo,Nayeong Kwon,Woojong Jang,Dong-Hwi Kim,Kyong-Hwan Bang 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
The volatile compositions of thre Korean ginseng cultivars (yunpoong, gumpoong, and cheonryang) and American ginseng under different cultivation years were analyzed by using HS-SPME/GC-MS. The differential volatile compounds were determined by multivariate statistical analysis including supervised PCA and unsupervised PLS-DA. In the present study, the results showed that major volatile compounds of ginseng cultivars were terpenes, such as spathulenol, β-myrcene, β-pinene, caryophyllene, D-limonen, sabinene and camphene. In particular, hexanal, γ-selinene, octanal, bicyclogermacrene, α-gurjunene, β-sesquiphellandrene, ginsinsene and panaginsene were mainly associated with Korean ginsengs. On the other hand, there was no significant difference between the volatile compounds of ginsengs and different cultivation years. The discrimination between Korean ginsengs and American ginseng could be contribute to β-farnesene, β-panasinsene, α-neoclovene, and α-isocomene. This study concludes that the volatile compositions of ginsengs could be more influenced by cultivars than the cultivation years.
Nitrate enhances the secondary growth of storage roots in Panax ginseng
Kyoung Rok Geem,Jaewook Kim,Wonsil Bae,Moo-Geun Jee,Jin Yu,Inbae Jang,Dong-Yun Lee,Chang Pyo Hong,Donghwan Shim,Hojin Ryu The Korean Society of Ginseng 2023 Journal of Ginseng Research Vol.47 No.3
Background: Nitrogen (N) is an essential macronutrient for plant growth and development. To support agricultural production and enhance crop yield, two major N sources, nitrate and ammonium, are applied as fertilizers to the soil. Although many studies have been conducted on N uptake and signal transduction, the molecular genetic mechanisms of N-mediated physiological roles, such as the secondary growth of storage roots, remain largely unknown. Methods: One-year-old P. ginseng seedlings treated with KNO<sub>3</sub> were analyzed for the secondary growth of storage roots. The histological paraffin sections were subjected to bright and polarized light microscopic analysis. Genome-wide RNA-seq and network analysis were carried out to dissect the molecular mechanism of nitrate-mediated promotion of ginseng storage root thickening. Results: Here, we report the positive effects of nitrate on storage root secondary growth in Panax ginseng. Exogenous nitrate supply to ginseng seedlings significantly increased the root secondary growth. Histological analysis indicated that the enhancement of root secondary growth could be attributed to the increase in cambium stem cell activity and the subsequent differentiation of cambium-derived storage parenchymal cells. RNA-seq and gene set enrichment analysis (GSEA) revealed that the formation of a transcriptional network comprising auxin, brassinosteroid (BR)-, ethylene-, and jasmonic acid (JA)-related genes mainly contributed to the secondary growth of ginseng storage roots. In addition, increased proliferation of cambium stem cells by a N-rich source inhibited the accumulation of starch granules in storage parenchymal cells. Conclusion: Thus, through the integration of bioinformatic and histological tissue analyses, we demonstrate that nitrate assimilation and signaling pathways are integrated into key biological processes that promote the secondary growth of P. ginseng storage roots.
자동차용 Wheel Bearing의 Brinell 해석
이승표(Seungpyo Lee),이선호(Seonho Lee),박주상(Jusang Park),장호섭(Hoseop Jang),박인배(Inbae Park) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
Brinell phenomenon observed on wheel bearing of vehicle represents the dent generated on raceway due to rotating balls. In this paper, numerical analysis is performed to analyze the Brinelling by using finite element method. Commercial software of MARC is used and plastic and contact analysis are carried out to compute the behavior of the raceways and balls. In order to get the accurate stress-strain relationship, tensile test is performed. To verify the reliability of this study, the depth of Brinell is measured by experiment and compared with computational analysis results.