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| 1 | Salicylic acid analogues with biological activity may induce chilling toler- ance of maize (Zea mays) seeds 显示文摘 | WANG Yang HU Jin QIN Guochen | 2012 | Botany2012，90，9： | 1 |
| 2 | Study on the Optimization of Extraction Technology of Rose laevigate Michx. Polysaccharides and Its in vitro Antioxidant Activity显示文摘[Objectives]This study was conducted to optimize the optimal process conditions for extracting polysaccharides from Rose laevigate Michx.with hot water.[Methods]The extraction rate of R.laevigate was used as an evaluation index,and extraction temperature,material-to-liquid ratio,extraction time and extraction times were selected as influencing factors.On the basis of single factor tests,L 9(34)orthogonal tests were carried out for optimization,and the content of polysaccharides was determined by the phenol-sulfuric acid method.The in vitro antioxidant activity of the extracted R.laevigate polysaccharides was studied.[Results]The effects of various influencing factors on the extraction rate of R.laevigate polysaccharides ranked as material-liquid ratio>extraction temperature>extraction times>extraction time.The optimal extraction process was extraction temperature 80℃,extraction time 2 h,and material-to-liquid ratio 1∶25,extraction times 3 times,under which the extraction rate was(9.55±0.12)%.R.laevigate polysaccharides had certain scavenging capacities of DPPH free radicals and hydroxyl free radicals,and its scavenging capacity of DPPH free radicals was better than that of hydroxyl free radicals.[Conclusions]This study provides a theoretical basis for the optimization of the extraction process of R.laevigate polysaccharides and the in-depth development and application of polysaccharides. | Guochen HU Han LIU Qianqian TANG Li CHENG Chenzhong JIN Yunyun ZHOU Xuejiao ZHANG Guiying LIU | 2021 | Agricultural Biotechnology2021，10，6： | 0 |
| 3 | Localized in‑situ deposition:a new dimension to control in fabricating surface micro/nano structures via ultrafast laser ablation显示文摘Controllable fabrication of surface micro/nano structures is the key to realizing surface functionalization for various applications.As a versatile approach,ultrafast laser ablation has been widely studied for surface micro/nano structuring.Increasing research eforts in this feld have been devoted to gaining more control over the fabrication processes to meet the increasing need for creation of complex structures.In this paper,we focus on the in-situ deposition process following the plasma formation under ultrafast laser ablation.From an overview perspective,we frstly summarize the diferent roles that plasma plumes,from pulsed laser ablation of solids,play in diferent laser processing approaches.Then,the distinctive in-situ deposition process within surface micro/nano structuring is highlighted.Our experimental work demonstrated that the in-situ deposition during ultrafast laser surface structuring can be controlled as a localized micro-additive process to pile up secondary ordered structures,through which a unique kind of hierarchical structure with fort-like bodies sitting on top of micro cone arrays were fabricated as a showcase.The revealed laser-matter interaction mechanism can be inspiring for the development of new ultrafast laser fabrication approaches,adding a new dimension and more fexibility in controlling the fabrication of functional surface micro/nano structures. | Peixun Fan Guochen Jiang Xinyu Hu Lizhong Wang Hongjun Zhang Minlin Zhong | 2023 | Frontiers of Optoelectronics2023，16，4： | 0 |
| 4 | Porous reduced graphene oxide for ultrasensitive detection of nitrogen dioxide显示文摘The defect engineering in graphene plays a significant role for the application of gas sensors. In this work, we proposed an efficient method to prepare ultrasensitive gas sensors based on the porous reduced graphene oxide(PRGO). Photo-Fenton etching was carried out on GO nanosheets in a controlled manner to enrich their vacancy defects. The resulting porous graphene oxide(PGO) was then drop-coated on interdigital electrodes and hydrothermal reduced at 180 °C. Controllable reduction was achieved by varying the water amount. The gas sensor based on PRGO-5 min-6h exhibited superior sensing and selective performance toward nitrogen dioxide(NO2), with an exceptional high sensitivity up to 12 ppm-1.The theoretical limit of detection is down to 0.66 ppb. The excellent performance could be mainly attributed to the typical vacancy defects of PRGO. Some residue carboxylic groups on the edges could also facilitate the adsorption of polar molecules. The process has a great potential for scalable fabrication of high-performance NO2gas sensors. | Zengyong Chu Min Xiao Qichao Dong Guochen Li Tianjiao Hu Ye Zhang Zhenhua Jiang | 2023 | Chinese Chemical Letters2023，34，1： | 0 |
| 5 | Superomniphobic surfaces for easy-removals of environmentalrelated liquids after icing and melting显示文摘Superhydrophobic surfaces often lose the easy-removal ability of liquids during icing&melting cycles due to the impalement phenomena of air pockets.Especially for the most common mixed liquids in normal life,their difficult-removals after icing and melting have brought colossal troubles in the fields of aviation,energy,biomedicine,etc.Here we adopt the ultrafast laser to fabricate the optimal micro-nanostructured surfaces,realizing excellent superomniphobicity for seven environmental-related liquids.It is demonstrated that different droplets on the surfaces recover well to the original Cassie-Baxter state after melting,and can be removed easily at low tilted angles.The ice adhesion strengths of the seven liquids as low as 5 kPa and the micro-nanostructure durability ensure the long-term easy-removal after icing.Compared with the ice adhesion strength of untreated surfaces(264.4±17.6 kPa),those of our designed surfaces have decreased by over 50 times.Icing and melting processes are investigated to reveal the easy-removal mechanisms that specifically distributed solutes and bubbles after icing impact downwards significantly to accelerate the recovery of the Cassie–Baxter state during melting.A series of environmental-related durability experiments including continuous icing&melting cycles,long-term salt spray,and high-pressure water jet impact further demonstrate the surfaces promising for real applications. | Lizhong Wang Ze Tian Xiao Luo Changhao Chen Guochen Jiang Xinyu Hu Rui Peng Hongjun Zhang Minlin Zhong | 2023 | Nano Research2023，16，2： | 0 |
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