정식 시기와 적심 횟수가 화단국화의 생장과 개화에 미치는 영향

姚婧超, 정해준, 김동찬, 이진희, 권민훈, 서병기 배재대학교 자연과학연구소 2013 自然科學論文集 Vol.24 No.1

This study was conducted to investigate optimum planting date and pinching times on the growth and flowering of garden chrysanthemum(Dendranthema grandiflorum Ramat.). 3 lines of garden mums were planted on May 16, June 13 and July 11 respectively. As planting date was delayed, all the 3 lines' plant height and plant width was reduced. 09-19-49 line got the biggest plant height and width, followed by 09-11-37 line. And 08-166-02 line was the smallest. In different planting times, the experiment group of May 16 and June 13 got the biggest plant height, plant width and stem diameter. However, in the experiment group of May 16, most of the plants got flattened. The experiment group of June 13 got the best ornamental value, and the ornamental value was reduced in the experiment group of July 11 by the short vegetative growth. 09-19-49 line got the most flowers, while in different planting time, the experiment group of May 16 got the most flowers. 09-11-37 line got the biggest flower diameter. 09-11-37 line and 09-09-51 line were planted in the containers on the rooftop. Each groups were pinched by 1, 2 and 3 times on July 2, July 26 and Aug 16 respectively. There was no effect on plant height, plant width, and stem diameter of 09-09-51 line and 09-11-37 line between 1-time-pinching group and 2-time-pinching group. But 3-time-pinching group was reduced. There was no significance in flower diameter of these two lines but the number of flowers was reduced by more pinching times. Therefore, in this experiment, the groups which were planted on June 13 got the best ornamental value and the recommended planting time is in the middle of June. Furthermore, 2 times of pinching was recommended.

조경용 국화 품종 ‘Pansy Ball’과 육성 계통의 적정 식재 밀도

정해준 · 김동찬 · 姚婧超 · 서병기 배재대학교 자연과학연구소 2012 自然科學論文集 Vol.23 No.1

This research was carried out to investigate optimum planting density of landscape garden mum ‘Pansy Ball’ and 5 inbred lines. ‘Pansy Ball’ and 5 inbred lines of garden mums were planted at Pai Chai university campus on April 25, 2011. Plant density was controlled by 1 plant, 2 plants, 4 plants in one plot of 0.4m x 0.5m respectively. Average plant height in 1 plant in one plot was 46.2cm~71.7cm. And the average plant height in 2 plant in one plot was 45.9cm~64.8cm, while 4 plant in one plot was 38.9cm~53.2cm. Also, plant width of 05-18-01, 05-01-01, 09-76-03, and 09-02-02 inbred lines were over 50cm by 1 plant in one plot. However, as the plant height and plant density was high, most of the plants got flattened and the ornamental value was also reduced. We got the ‘Pansy Ball’ and 2 inbred lines 09-76-03, 09-02-02 for proper landscape ground cover plant.

Design of Drug-Delivery Micro-Wheel and Auto-Rolling Control by Change of Gravity Center

Jing-Yao Lai,Nan-Chyuan Tsai,Hsin-Lin Chiu 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.

A micro-dosing system of overall size 5×5×4.2 mm3 for drug delivery is proposed and presented. The drug delivery system mainlyconsists of a micro-wheel and a micro-drug release mechanism. The motion of the micro-wheel is controlled by its center of gravityvia a running disk, which is placed within the hollow micro-wheel and attracted by the actuated micro-solenoids fabricated on theinner wall of micro-wheel in shift. In addition, the micro-wheel is controlled to roll forwards/backwards to the designated locationby two sliding mode control strategies: one for long-distance motion (to transport the drug to the vicinity of the spots under disease)and the other for short-distance motion (to decelerate down and stop at the exact drug-release location). On the other hand, the microdrugrelease mechanism is composed by a cantilever beam and a chamber filled up by medicine. The pyramid tip of the cantileverbeam deflected by the applied electrostatic force is designed to penetrate the micro-film which seals the chamber so that the medicinecan be released at the specified spot.

Functional Characterization of aroA from Rhizobium Leguminosarum with Significant Glyphosate Tolerance in Transgenic Arabidopsis

( Jing Han ),( Yong Sheng Tian ),( Jing Xu ),( Li Juan Wang ),( Bo Wang ),( Ri He Peng ),( Quan Hong Yao ) 한국미생물 · 생명공학회 2014 Journal of microbiology and biotechnology Vol.24 No.9

Glyphosate is the active component of the top-selling herbicide, the phytotoxicity of which is due to its inhibition of the shikimic acid pathway. 5-Enolpyruvylshikimate-3-phosphate synthase (EPSPS) is a key enzyme in the shikimic acid pathway. Glyphosate tolerance in plants can be achieved by the expression of a glyphosate-insensitive aroA gene (EPSPS). In this study, we used a PCR-based two-step DNA synthesis method to synthesize a new aroA gene (aroAR. leguminosarum) from Rhizobium leguminosarum. In vitro glyphosate sensitivity assays showed that aroAR. leguminosarum is glyphosate tolerant. The new gene was then expressed in E. coli and key kinetic values of the purified enzyme were determined. Furthermore, we transformed the aroA gene into Arabidopsis thaliana by the floral dip method. Transgenic Arabidopsis with the aroAR. leguminosarum gene was obtained to prove its potential use in developing glyphosate-resistant crops.

Electrospun Li2MnO3-Modified Li1.2NixCo0.1Mn0.9-xO2 Nanofibers: Synthesis and Enhanced Electrochemical Performance for Lithium-Ion Batteries

Jing Yao,Xinlu Wang,Xinru Zhao,Jinxian Wang,Hongbo Zhang,Wensheng Yu,Guixia Liu,Xiangting Dong 대한금속·재료학회 2016 ELECTRONIC MATERIALS LETTERS Vol.12 No.6

The Li2MnO3-modified Li1.2NixCo0.1Mn0.9-xO2 (x = 0.2, 0.45, 0.7)as cathode materials for lithium-ion batteries have beensuccessfully synthesized by a simple electrospinning process. Thestructure, morphology and electrochemical performances of theresulting products are studied systematically. The as-preparedLi2MnO3-modified Li1.2NixCo0.1Mn0.9-xO2 (x = 0.2, 0.45, 0.7) with adiameter of 200-300 nm has an initial discharge capacity of168.740 mAh·g−1, coulombic efficiency of 99.6% and a reversiblecapacity as high as 139.016 mAh·g−1 after 200 cycles at a currentrate of 0.2 C. The excellent electrochemical performances ofwhich are attributed to the stabilization of Li2MnO3 structure, therole of Li2MnO3 is contribute extra lithium to the reversiblecapacity and to facilitate Li+ transport through the structure.

Nano-eutectic growth in Co-17.8 wt%Gd alloy ribbons and the magnetostrictive properties at different wheel speeds.

Yao, Wen-Jing,Sun, Wen,Wang, Nan,Han, Seung Zeon,Lee, Je-Hyun American Scientific Publishers 2014 Journal of nanoscience and nanotechnology Vol.14 No.11

<P>Under near-equilibrium solidification conditions, the Co-17.8 wt%Gd eutectic alloy forms rod-like eutectic microstructure of (αCo) solid solution and Co17Gd2 compound. When the solidification condition is far from the equilibrium, the rapid growth of nano-eutectic in Co-17.8 wt%Gd alloy ribbons is realized by the single-roller techniques. The average granular size (d) of nano-eutectic in the center of ribbons varies with the increase of wheel speed (V), d = 510.36-25.51 V+0.44 V2. XRD results of ribbons at different wheel speeds indicate that, with the rise of wheel speed, the main peak of Co17Gd2 compound becomes more and more notable, whereas the main peak of (αCo) solid solution tends to reduce. Along the length direction, the Co-17.8 wt%Gd alloy ribbons have the negative magnetostrictive strain. The magnetostrictive strain enhances with the increase of wheel speed. At the wheel speed of 40 m/s, the magnetostrictive coefficient of ribbons is measured to be - 733 ppm at the magnetic field of 6 kOe. The influence of the wheel speed and the magnetic field on the maanetostrictive coefficient is discussed.</P>

Assessment of the Cytotoxic and Apoptotic Effects of Chaetominine in a Human Leukemia Cell Line

( Jing Yun Yao ),( Rui Hua Jiao ),( Chang Qing Liu ),( Yu Peng Zhang ),( Wan Guo Yu ),( Yan Hua Lu ),( Ren Xiang Tan ) 한국응용약물학회 2016 Biomolecules & Therapeutics(구 응용약물학회지) Vol.24 No.2

Chaetominine is a quinazoline alkaloid originating from the endophytic fungus Aspergillus fumigatus CY018. In this study, we showed evidence that chaetominine has cytotoxic and apoptotic effects on human leukemia K562 cells and investigated the pathway involved in chaetominine-induced apoptosis in detail. Chaetominine inhibited K562 cell growth, with an IC50 value of 35 nM, but showed little inhibitory effect on the growth of human peripheral blood mononuclear cells. The high apoptosis rates, morphological apoptotic features, and DNA fragmentation caused by chaetominine indicated that the cytotoxicity was partially caused by its pro-apoptotic effect. Under chaetominine treatment, the Bax/Bcl-2 ratio was upregulated (from 0.3 to 8), which was followed by a decrease in mitochondrial membrane potential, release of cytochrome c from mitochondria into the cytosol, and stimulation of Apaf-1. Furthermore, activation of caspase-9 and caspase-3, which are the main executers of the apoptotic process, was observed. These results demonstrated that chaetominine induced cell apoptosis via the mitochondrial pathway. Chaetominine inhibited K562 cell growth and induced apoptotic cell death through the intrinsic pathway, which suggests that chaetominine might be a promising therapeutic for leukemia.

Assessment of the Cytotoxic and Apoptotic Effects of Chaetominine in a Human Leukemia Cell Line

Jing-Yun Yao,Ruihua Jiao,Changqing Liu,Yupeng Zhang,Wan-Guo Yu,Yan-Hua Lu,Renxiang Tan 한국응용약물학회 2016 Biomolecules & Therapeutics(구 응용약물학회지) Vol.24 No.2

Chaetominine is a quinazoline alkaloid originating from the endophytic fungus Aspergillus fumigatus CY018. In this study, we showed evidence that chaetominine has cytotoxic and apoptotic effects on human leukemia K562 cells and investigated the pathway involved in chaetominine-induced apoptosis in detail. Chaetominine inhibited K562 cell growth, with an IC50 value of 35 nM, but showed little inhibitory effect on the growth of human peripheral blood mononuclear cells. The high apoptosis rates, morphological apoptotic features, and DNA fragmentation caused by chaetominine indicated that the cytotoxicity was partially caused by its pro-apoptotic effect. Under chaetominine treatment, the Bax/Bcl-2 ratio was upregulated (from 0.3 to 8), which was followed by a decrease in mitochondrial membrane potential, release of cytochrome c from mitochondria into the cytosol, and stimulation of Apaf-1. Furthermore, activation of caspase-9 and caspase-3, which are the main executers of the apoptotic process, was observed. These results demonstrated that chaetominine induced cell apoptosis via the mitochondrial pathway. Chaetominine inhibited K562 cell growth and induced apoptotic cell death through the intrinsic pathway, which suggests that chaetominine might be a promising therapeutic for leukemia.

Displacement and dual-pressure compound control for fast forging hydraulic system

Jing Yao,Bin Liu,Xiangdong Kong,Fang Zhou 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.1

The poor energy efficiency is a big issue in the conventional electro-hydraulic proportional valve controlled fast forging system due tothe huge throttling losses and overflow losses. Aimed to address this problem, a new compound control strategy of displacement anddual-pressure was proposed in this study. Firstly, the mathematic model of the main components was built, and the compound controlstrategy was designed depending on the different working conditions. Then, the overall control system was integrated for both downstrokestage and return-stroke stage. The proposed control strategy was tested and evaluated in a 0.6 MN fast forging press. Results indicatedthat the input energy was reduced by 50% and energy loss decreased dramatically while control performance is good. Results alsoshow that control performance and energy saving is significantly affected by the variation of △p and pb. Overall, the proposed new controlstrategy could be used for the fast forging press with high energy efficiency.

Cross-coupled fuzzy PID control combined with full decoupling compensation method for double cylinder servo control system

Jing Yao,Xiaoming Cao,Yang Zhang,Yao Li 대한기계학회 2018 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.32 No.5

The purpose of this thesis is to develop a double cylinder synchronization control system to address the high precision control requirement of this system. First, the dual-input dual-output coupling mathematical model of the hydraulic press synchronization control system was built using mechanism modelling. Then, the mathematical model of compensating and decoupling links is established by the input and load disturbance decoupling control method based on feedback compensation. Next, a cross-coupled fuzzy PID controller is designed, which is then combined with full decoupling compensation method. Finally, the coupling characteristics of the synchronization control system and the synchronization control performance of the hydraulic cylinders under the cross-coupled fuzzy PID controller combined with the decoupling control algorithm were tested and evaluated in a principle experiment platform. The results indicate that the robustness and the ability to resist interference load are improved under the theory and control strategy outlined in this paper.