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| 1 | Polyamine Accumulation in Transgenic Tomato Enhances the Tolerance to High Temperature Stress显示文摘Polyamines play an important role in plant response to abiotic stress.S-adenosyl-l-methionine decarboxylase(SAMDC) is one of the key regulatory enzymes in the biosynthesis of polyamines.In order to better understand the effect of regulation of polyamine biosynthesis on the tolerance of high-temperature stress in tomato,SAMDC cDNA isolated from Saccharomyces cerevisiae was introduced into tomato genome by means of Agrobacterium tumefaciens through leaf disc transformation.Transgene and expression was confirmed by Southern and Northern blot analyses,respectively.Transgenic plants expressing yeast SAMDC produced 1.7-to 2.4-fold higher levels of spermidine and spermine than wild-type plants under high temperature stress,and enhanced antioxidant enzyme activity and the protection of membrane lipid peroxidation was also observed.This subsequently improved the efficiency of CO2 assimilation and protected the plants from high temperature stress,which indicated that the transgenic tomato presented an enhanced tolerance to high temperature stress(38℃) compared with wild-type plants.Our results demonstrated clearly that increasing polyamine biosynthesis in plants may be a means of creating high temperature-tolerant germplasm. | Lin Cheng Yijing Zou Shuli Ding Jiajing Zhang Xiaolin Yu Jiashu Cao Gang Lu | 2009 | Journal of Integrative Plant Biology2009，51，5： | 16 |
| 2 | PtNi-W/C with Atomically Dispersed Tungsten Sites Toward Boosted ORR in Proton Exchange Membrane Fuel Cell Devices显示文摘The performance of proton exchange membrane fuel cells is heavily dependent on the microstructure of electrode catalyst especially at low catalyst loadings.This work shows a hybrid electrocatalyst consisting of PtNi-W alloy nanocrystals loaded on carbon surface with atomically dispersed W sites by a two-step straightforward method.Single-atomic W can be found on the carbon surface,which can form protonic acid sites and establish an extended proton transport network at the catalyst surface.When implemented in membrane electrode assembly as cathode at ultra-low loading of 0.05 mgPt cm^(−2),the peak power density of the cell is enhanced by 64.4%compared to that with the commercial Pt/C catalyst.The theoretical calculation suggests that the single-atomic W possesses a favorable energetics toward the formation of*OOH whereby the intermediates can be efficiently converted and further reduced to water,revealing a interfacial cascade catalysis facilitated by the single-atomic W.This work highlights a novel functional hybrid electrocatalyst design from the atomic level that enables to solve the bottle-neck issues at device level. | Huawei Wang Jialong Gao Changli Chen Wei Zhao Zihou Zhang Dong Li Ying Chen Chenyue Wang Cheng Zhu Xiaoxing Ke Jiajing Pei Juncai Dong Qi Chen Haibo Jin Maorong Chai Yujing Li | 2023 | Nano-Micro Letters2023，15，9： | 3 |
| 3 | Broadband Acoustic Vibration Sensor Based on Cladding-Mode Resonance of Double-Cladding Fiber显示文摘We have proposed and demonstrated a double-cladding fiber (DCF) with cladding?mode resonance property for broadband acoustic vibration sensing. Since the fundamental mode in the core waveguide is able to be coupled to LP05 mode in the tube waveguide once the phase-matching condition is fulfilled, the transmission spectrum can exhibit a dip with a large extinction ratio. An acoustic vibration could induce the wavelength shift of such transmission spectrum, so that the intensity variation at a wavelength near the dip is coded with the information of the acoustic vibration signal. By demodulating the response of intensity variation, the frequency of the applied acoustic vibration signal can be recovered. Such a DCF-based sensor with an intensity modulation could measure the acoustic vibration with a broadband frequency range from 1 Hz to 400 kHz and exhibits the maximum signal-to-noise ratio (SNR) of ?80.79 dB when the vibration frequency is 20 kHz. The obtained results show that the proposed DCF-based acoustic vibration sensor has a potential application in environmental assessment, structural damage detection, and health monitoring. | Guanghui SUI Huanhuan LIU Fufei PANG Jiajing CHENG Tingyun WANG | 2019 | Photonic Sensors2019，9，3： | 2 |
| 4 | Levonorgestrel- Releasing Intrauterine System versus Medical Therapy for Menorrhagia: A Systematic Review and Meta-Analysis显示文摘 | Jin Qiu Jiajing Cheng Qingying Wang | 2014 | Med Sci Monit2014，20，： | 1 |
| 5 | Hierarchical palladium catalyst for highly active and stable water oxidation in acidic media显示文摘Acidic water electrolysis is of great importance for boosting the development of renewable energy.However,it severely suffers from the trade-off between high activity and long lifespan for oxygen evolution catalysts on the anode side.This is because the sluggish kinetics of oxygen evolution reaction necessitates the application of a high overpotential to achieve considerable current,which inevitably drives the catalysts far away from their thermodynamic equilibrium states.Here we demonstrate a new oxygen evolution model catalyst-hierarchical palladium(Pd)whose performance even surpasses the benchmark Ir-and Ru-based materials.The Pd catalyst displays an ultralow overpotential(196 mV),excellent durability and mitigated degradation(66μV h^(-1))at 10 mA cm^(-2)in 1 M HClO_(4).Tensile strain on Pd(111)facets weakens the binding of oxygen species on electrochemical etching-derived hierarchical Pd and thereby leads to two orders of magnitudes of enhancement of mass activity in comparison to the parent Pd bulk materials.Furthermore,the Pd catalyst displays the bifunctional catalytic properties for both oxygen and hydrogen evolutions and can deliver a current density of 2 A cm^(-2)at a low cell voltage of 1.771 V when fabricated into polymer ele ctrolyte membrane ele ctrolyser. | Jing Peng Haofeng Sun Kun Ni Jiajing Wu Xinyu Sun Yueqi Su Han Cheng Yuhua Liu Yuqiao Guo Wentuan Bi Yanwu Zhu Changzheng Wu Yi Xie | 2023 | National Science Review2023，10，2： | 0 |
| 6 | An in vitro cellular system modelling progressive human adipose-derived stem cell aging显示文摘Adipose-derived stem cells (ADSCs) assume essential roles intissue homeostasis and aging and have been explored as regenera-tive therapies for a broad range of diseases including physiologicaland pathological aging [1 ]. These multipotent cells are plastic, cap-able to differentiate and transdifferentiate to a range of cell types[2]. With aging, diseases and inundergo cellular senescence [3].vitro passing, ADSCs decline andFor therapies, typically cells fromyoung adults before 5-8 passages should be used, posing majorobstacles for conditions requiring much more cells [4]. | Yanghua Shi Lian Wang Yichang Li Congdi Xu Xiaowen Shao Zhongping Cheng Mei Jiang Jiajing Cheng Jun Xu Jianxing Song Xiuli Wang Zhengliang Gao | 2018 | Science Bulletin2018，63，5： | 0 |
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