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| 1 | Changes of Levels of Glutamine Synthetase Isoforms in Roots and Leaves in Responseto Nitrogen Fertilizer Application at Different Growth Stages in Irrigated Rice显示文摘Nitrogen is a key element to control the growth and yield of crops. Fertilizer urea nitrogen(N)60,45,and 30 kg/hm2 was applied at three different stages, midtillering, panicle initiation, and flowering,of the growth and development of rice plants. respectively. At both midtillering and panicle initiation, the total activity of glutamine synthetase (GS) in rice roots and leaves ovas increased remarkably as a result of a large amount of ammonia absorbed by roots. Native-PAGE and activity staining showed that the increase of total activity in rice roots and leaves was due to the synthesis of GSrb in roots and GSZ in leaves and that the activity of GSra in roots and GSI in leaves remained constant. The results shoaled that the assimilation of external nitrogen was carried out by GSrb but not GSra in rice roots and that the activitry. of GS2 ovas induced also by the external nitrogen, and that GSrb played main role in meeting the needs of the rapid tillering for nitrogen. At flowering, the activity of GS in rice roots and leaves did not change almost after topdressing.These rssults suggest that the change of GS activity in rice roots may use as a measure of the utilization efficiency of the fertilizer. | Zhang Chufu Peng Shaobing John Bennett | 1998 | Wuhan University Journal of Natural Sciences1998，3，4： | 4 |
| 2 | Key CO_(2)capture technology of pure oxygen exhaust gas combustion for syngas-fueled high-temperature fuel cells显示文摘Integrated gasification fuel cells(IGFCs)integrating high-temperature solid oxide fuel cell technology with CO_(2)capture processes represents highly-efficient power systems with negligible CO_(2)emissions.Flame burning with pure oxygen is an ideal method for fuel cell exhaust gas treatment,and this report describes experimental and numerical studies regarding an oxy-combustor for treating the exhaust gas of a 10 kW IGFC system anode.The applied simulation method was verified based on experiments,and the key performance indices of the combustor were studied under various conditions.It was determined that 315 K was the ideal condensation temperature to obtain flame stability.Under these pure oxygen flame burning conditions,CO was almost completely converted,and the dry mole fraction of CO_(2)after burning was C 0.958 when there was up to 5%excess O_(2).Overall,5%excess O_(2)was recommended to maximize CO_(2)capture and promote other environmental considerations.Additionally,the optimal tangential fuel jet angle to control the liner temperature was approximately 25°.The total fuel utilization had to be high enough to maintain the oxygen flame temperature of the anode exhaust gas below 1800 K to ensure that the system was environmentally friendly.The results presented herein have great value for designing IGFCs coupled with CO_(2)capture systems. | Hanlin Wang Qilong Lei Pingping Li Changlei Liu Yunpeng Xue Xuewei Zhang Chufu Li Zhibin Yang | 2021 | International Journal of Coal Science & Technology2021，8，3： | 3 |
| 3 | The application of event-tree based approach in long-term crude oil scheduling显示文摘This paper addresses the problem of optimal operation in long-term crude oil scheduling,which involves unloading crude oil from vessels,transferring it to charging tanks and feeding it to the distillation units.The application of a new approach for modeling and optimization of long-term crude oil scheduling is presented and the event-tree based modeling method that is very different from mathematical programming is employed.This approach is developed on the basis of natural language modeling and continuous time representation.Event triggered rules,decomposition strategy,depth-first search algorithm and pruning strategy are adopted to improve the efficiency of searching the optimum solution.This approach is successfully applied to an industrial-size problem over a horizon of 4 weeks,involving 7 vessels,6 storage tanks,6 charging tanks,2 crude oil distillation units,and 6 crude oil types.The CPU (AMD 3000+,2.0GHz) solving time is less than 70 seconds. | ZOU LaiXi,LI ChuFu,ZHANG Ming & HE XiaoRong Department of Chemical Engineering,Tsinghua University,Beijing 100084,China | 2010 | Science China Chemistry2010，53，6： | 3 |
| 4 | Response of glutamine synthetase isoforms to nitrogen sources in rice ( Oryza sativa L.) roots显示文摘 | Chufu Zhang Shaobing Peng Xinxiang Peng Arlene Q. Chavez John Bennett | 1997 | Plant Science1997，，2： | 2 |
| 5 | Response of glutamine synthetase isoforms to nitrogen sources in rice ( Oryza sativa L.) roots显示文摘 | Chufu Zhang Shaobing Peng Xinxiang Peng Arlene Q. Chavez John Bennett | 1997 | Plant Science1997，，2： | 1 |
| 6 | Performance test of a 5 kW solid oxide fuel cell system under high fuel utilization with industrial fuel gas feeding显示文摘As the demand for green energy with high efficiency and low carbon dioxide(CO2)emissions has increased,solid oxide fuel cells(SOFCs)have been intensively developed in recent years.Integrated gasification fuel cells(IGFCs)in particular show potential for large-scale power generation to further increase system efficiency.Thus,for commercial application of IGFCs,it is important to design reliable multi-stacks for large systems that show long-term stability and practical fuel gas for application to industrial equipment.In this work,a test rig(of a 5 kW SOFC system,with syngas from industrial gasifiers as fuel)was fabricated and subjected to long-term tests under high fuel utilization to investigate its performance.The maximum steady output power of the system was 5700 W using hydrogen and 5660 W using syngas and the maximum steady electrical efficiency was 61.24%while the fuel utilization efficiency was 89.25%.The test lasted for more than 500 h as the fuel utilization efficiency was larger than 83%.The performances of each stack tower were almost identical at both the initial stage and after long-term operation.After 500 h operation,the performances of the stack towers decreased only slightly under lower current and showed almost no change under high current.These results demonstrate the reliability of the multi-stack design and the prospect of this SOFC power-generation system for further enlarging its application in a MWth demonstration. | Ming Xu Hanlin Wang Mingxian Liu Jianning Zhao Yuqiong Zhang Pingping Li Mingliang Shi Siqi Gong Zhaohuan Zhang Chufu Li | 2021 | International Journal of Coal Science & Technology2021，8，3： | 0 |
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