http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Bo-Kook Jang(장보국),Cheol Hee Lee 한국원예학회 2021 한국원예학회 학술발표요지 Vol.2021 No.10
Cryopreservation is the preferred method for gene banks because it allows safe and long-term preservation of various plant species and germplasm using only a small space. Moreover, it can be applied to a wide range of flora and is thus an ideal preservation method. Therefore, the present study have proposed the cryopreservation method for long-term conservation of eastern bracken gametophytes. Encapsulation-dehydration of gametophytes was performed, and conditions for exogenous sucrose and abscisic acid (ABA) preculture were investigated. Gametophytes are sensitive to dehydration and drying, and the following treatment conditions were required to survive from cryopreservation: encapsulation by alginate containing 0.75 M sucrose, 18 h loading treatment containing 0.75 M sucrose, and 6 h drying treatment. Encapsulation is essential for gametophyte survival. After dehydration and drying, the moisture content of alginate beads was less than 27.5%, which was appropriate for maintaining the survivability. In addition, sucrose, and ABA preculture were essential before encapsulation to achieve a survival of 90% or more. Various stress and preculture during the cryopreservation process regulated gene expression of PaSuSy, PaLEA14, and PaABI1b, as well as endogenous ABA content. These results suggest that the encapsulation-dehydration method is effective for long-term conservation of eastern bracken gametophyte, and that preculture can alleviate abiotic stress and increase its survival.
Effect of Etched Substrates in Long-Term Stability Testing of Dye-Sensitized Solar Cells
Jang, Sung-Il,Jeong, Bo-Hwa,Kim, Young-Geun,Lee, Su-Bin,Cho, Yong-Rae,Park, Sung-Hae,Lee, Jin-Kook,Kim, Mi-Ra TaylorFrancis 2008 MOLECULAR CRYSTALS AND LIQUID CRYSTALS - Vol.491 No.1
<P> The dye-sensitized solar cells (DSSCs) examine long-term stability tests were prepared to SnO2:F (FTO) glass substrates patterned by the etching method were applied to the electrode on the device using polyethyleneglycol (PEG) electrolyte. We investigated the effect of patterned SnO2:F (FTO) glass substrates on the power conversion efficiency and long-term stability of DSSCs. The patterned devices maintained over 83% of its initial overall power conversion efficiency after 720 hours aging at room temperature, while the devices using non-patterned FTO glass substrates showed drastic decrease in performances.</P>
Bo Kook Jang,Ju Sung Cho,Hyuk Joon Kwon,이철희 한국원예학회 2019 Horticulture, Environment, and Biotechnology Vol.60 No.1
Dryopteris erythrosora (D. C. Eaton) Kuntze is used as an ornamental horticultural crop and landscaping plant, and it is aplant with high development value as an herbal medicine, but there are few studies to proliferate a large amount of plants. This study aimed to determine a suitable method for spore germination, gametophyte proliferation, sporophyte formation,and seedling production in D. erythrosora . Spore germination rate was highest in 1/2 × Murashige and Skoog (MS) medium(92.8%). A suitable medium for prothallus proliferation was selected based on gametophytes produced from germinatedspores. A 1 × MS medium was most eff ective for gametophyte proliferation and active organ formation; moreover, 1 × MSmedium containing 1% sucrose without activated charcoal was the most eff ective growth condition for inducing gametophytegrowth and development. The suitable culture soil composition for sporophyte formation was investigated by varying theratio of horticultural substrate, peat moss, perlite, and decomposed granite. We found that a 2:1 (v:v) mixture of horticulturalsubstrate and perlite accelerated sporophyte formation (155 units). Furthermore, suitable seedlings and transplants for sporophyteseedling growth were determined by varying the ratio of horticultural substrate and decomposed granite, as well as plugtray cell size. For sporophyte seedlings, the greatest growth in root length (92.9 mm) and the most aerial and undergroundfresh weight (234.1 and 40.3 g, respectively) were observed in a mixture of horticultural substrate and decomposed graniteat a 1:2 (v:v) ratio. Our results using tissue culture technology will be provided as a mass production method for substantialindustrialization of D. erythrosora plants.
Integrated genomic analysis of recurrence-associated small non-coding RNAs in oesophageal cancer
Jang, Hee-Jin,Lee, Hyun-Sung,Burt, Bryan M,Lee, Geon Kook,Yoon, Kyong-Ah,Park, Yun-Yong,Sohn, Bo Hwa,Kim, Sang Bae,Kim, Moon Soo,Lee, Jong Mog,Joo, Jungnam,Kim, Sang Cheol,Yun, Ju Sik,Na, Kook Joo,Cho BMJ Publishing Group Ltd 2017 Gut Vol.66 No.2
<P>Conclusion We developed an easy-to-use prognostic model with three sncRNAs as robust prognostic markers for postoperative recurrence of ESCC. We anticipate that such a stratified and systematic, tumour-specific biological approach will potentially contribute to significant improvement in ESCC treatment.</P>
Pull Test for Determination of Basic Friction Angle of Rock Joints
( Kook-hyun Lee ),( Gyn-young Jeong ),( Min-yong Sim ),( Hyun-sic Jang ),( Bo-an Jang ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
Although tilt test is the suggested by ISRM for basic friction angle measurement, basic friction angles measured by the tilt test are usually distributed in a wide range. Basic friction angles of granite, sandstone, marble, gneiss, and shale were measured by three different test methods, such as direct shear test, pull test and tilt test. Results are compared to determine the accuracy of measurement and the most convenient and accurate method for basic friction angle measurement. Samples were prepared as slab shape or disc shape, and sliding planes were polished by #100 grinding powders. Basic friction angles of granite, sandstone, marble, gneiss, and shale measured by direct shear test were 28.7º, 36.9º, 33.0º, 29.8º and 33.1º, respectively. Those measured by pull were almost identical with those measured by direct shear test within 2º. However, basic friction angles measured by the tilt test show a wide range. Pull test can be performed by a simple and convenient way, but results are more accurate than tilt test. These results indicate that pull test may be a better method to measure basic friction angle than the tilt test.
Jang, Bo Kook,Chi, Lai Won,Cho, Ju Sung,Lee, Cheol Hee The Korean Society of Plant Biotechnology 2020 식물생명공학회지 Vol.47 No.1
This study aimed to screen for plants with antimicrobial potential among the evergreen woody species of South Korea that are used for horticulture and landscaping and to provide basic information about plants with proven antimicrobial activity to underpin future research. The plant materials were extracted under various conditions, and the antimicrobial activities of the extracts were evaluated by agar diffusion assay. The screening tests demonstrated that the crude extracts of 43 species had inhibitory effects against S. aureus. The inhibitory activities of four species (Elaeocarpus sylvestris, Camellia japonica, Cleyera japonica, and Quercus salicina) were relatively higher than that of the synthetic antimicrobial agents methylparaben and phenoxyethanol. The highest inhibitory activity was observed with the leaf extracts (extracted with methanol for 30 minutes) of E. sylvestris, based on induction of the largest inhibition zone of 23.3 mm in size. In addition, solvent fractions of E. sylvestris were evaluated. The largest inhibitory zone of 23.1 mm was observed for the n-butanol fraction, which is likely to contain effective compounds that exhibit inhibitory activity against S. aureus. In contrast, n-hexane and residual aqueous fractions showed no antimicrobial activity. Overall, our findings confirm that evergreen woody plants native to South Korea have potential antimicrobial activity.