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| 1 | Effect of six kinds of scale inhibitors on calcium carbonate precipitation in high salinity wastewater at high temperatures显示文摘Precipitation of calcium carbonate(Ca CO3) scale on heat transfer surfaces is a serious and expensive problem widely occurring in numerous industrial processes. In this study, we compared the scale inhibition effect of six kinds of commercial scale inhibitors and screened out the best one(scale inhibitor SQ-1211) to investigate its scale inhibition performance in highly saline conditions at high temperature through static scale inhibition tests. The influences of scale inhibitor dosage, temperature, heating time and p H on the inhibition efficiency of the optimal scale inhibitor were investigated. The morphologies and crystal structures of the precipitates were characterized by Scanning Electron Microscopy and X-ray Diffraction analysis. Results showed that the scale inhibition efficiency of the optimal scale inhibitor decreased with the increase of the reaction temperature. When the concentration of Ca2+was 1600 mg/L, the scale inhibition rate could reach 90.7% at 80°C at p H 8. The optimal scale inhibitor could effectively retard scaling at high temperature. In the presence of the optimal scale inhibitor, the main crystal structure of Ca CO3 changed from calcite to aragonite. | Xiaochen Li Baoyu Gao Qinyan Yue Defang Ma Hongyan Rong Pin Zhao Pengyou Teng | 2015 | Journal of Environmental Sciences2015，27，3： | 15 |
| 2 | Structure and superconductivity of hydrides at high pressures显示文摘Hydrogen atoms can provide high phonon frequencies and strong electron–phonon coupling in hydrogen-rich materials,which are believed to be potential high-temperature superconductors at lower pressure than metallic hydrogen.Especially,recently both of theoretical and experimental reports on sulfur hydrides under pressure exhibiting superconductivity at temperatures as high as 200 K have further stimulated an intense search for room-temperature superconductors in hydrides.his review focuses on crystal structures,stabilities,pressure-induced transformations,metallization,and superconductivity of hydrogen-rich materials at high pressures. | Defang Duan Yunxian Liu Yanbin Ma Ziji Shao Bingbing Liu Tian Cui | 2017 | National Science Review2017，4，1： | 3 |
| 3 | Multiplicity results of breathers for the discrete nonlinear Schrdinger equations with unbounded potentials显示文摘We consider a class of discrete nonlinear Schrdinger equations with unbounded potentials. We obtain some new multiplicity results of breathers of the equations by using critical point theory. Our results greatly improve some recent results in the literature. | ZHOU Zhan MA DeFang | 2015 | Science China Mathematics2015，58，4： | 1 |
| 4 | Ternary superconducting cophosphorus hydrides stabilized via lithium显示文摘Inspired by the diverse properties of sulfur hydrides and phosphorus hydrides,we combine first-principles calculations with structure prediction to search for stable structures of Li−P−H ternary compounds at high pressures with the aim of finding novel superconductors.It is found that phosphorus hydrides can be stabilized under pressure via additional doped lithium. | Ziji Shao Defang Duan Yanbin Ma Hongyu Yu Hao Song Hui Xie Da Li Fubo Tian Bingbing Liu Tian Cui | 2019 | npj Computational Materials2019，，1： | 1 |
| 5 | Evaluation of a submerged membrane bioreactor (SMBR) coupled with chlorine disinfection for municipal wastewater treatment and reuse显示文摘 | Ma Defang Gao Baoyu Hou Dianxun | 2013 | Desalination2013，313，15： | 1 |
| 6 | Inhibition of gapjunction intercellular communication by extremely low-frequencyelectromagnetic fields in osteoblast-like models is dependent oncell differentiation 显示文摘 | Yamaguchi DT Huang Jason Ma Defang | 2002 | Journal of Cellular Physiology2002，190，2： | 1 |
| 7 | Progress in oncolytic viruses modified with nanomaterials for intravenous application显示文摘In oncolytic virus(OV)therapy,a critical component of tumor immunotherapy,viruses selectively infect,replicate within,and eventually destroy tumor cells.Simultaneously,this therapy activates immune responses and mobilizes immune cells,thereby eliminating residual or distant cancer cells.However,because of OVs’high immunogenicity and immune clearance during circulation,their clinical applications are currently limited to intratumoral injections,and their use is severely restricted.In recent years,numerous studies have used nanomaterials to modify OVs to decrease virulence and increase safety for intravenous injection.The most commonly used nanomaterials for modifying OVs are liposomes,polymers,and albumin,because of their biosafety,practicability,and effectiveness.The aim of this review is to summarize progress in the use of these nanomaterials in preclinical experiments to modify OVs and to discuss the challenges encountered from basic research to clinical application. | Liting Chen Zhijun Ma Chen Xu Youbang Xie Defang Ouyang Shuhui Song Xiao Zhao Funan Liu | 2023 | Cancer Biology & Medicine2023，20，11： | 0 |
| 8 | 在成纤维细胞中通过一个化学小分子诱导的类XEN状态实现直接重编程显示文摘文章简介直接谱系重编程已经成为了一种具备应用前景的制备目的细胞类型的新方法。在通过化学小分子将小鼠成纤维细胞诱导为多能干细胞形成的过程中。 | Xiang Li Defang Liu Yantao Ma Xiaomin Du Junzhan Jing Lipeng Wang Bingqing Xie Da Sun Shaoqiang Sun Xueqin Jin Xu Zhang Ting Zhao Jingyang Guan Zexuan Yi Weifeng Lai Ping Zheng Zhuo Huang Yanzhong Chang 柴真 Jun Xu 邓宏魁 | 2018 | 科学新闻2018，0，4： | 0 |
| 9 | Formation of disinfection by-products during sodium hypochlorite cleaning of fouled membranes from membrane bioreactors显示文摘Periodic chemical cleaning with sodium hypochlorite(NaClO)is essential to restore the membrane permeability in a membrane bioreactor(MBR).However,the chlorination of membrane foulants results in the formation of disinfection by-products(DBPs),which will cause the deterioration of the MBR effluent and increase the antibiotic resistance in bacteria in the MBR tank.In this study,the formation of 14 DBPs during chemical cleaning offouled MBR membrane modules was investigated.Together with the effects of biofilm extracellular polymeric substances(EPS),influences of reaction time,NaClO dosage,initial pH,and cleaning temperature on the DBP formation were investigated.Haloacetic acids(HAAs)and trichloromethane(TCM),composed over 90%of the DBPs,were increasingly accumulated as the NaClO cleaning time extended.By increasing the chlorine dosage,temperature,and pH,the yield of TCM and dichloroacetic acid(DCAA)was increased by up to a factor of 1–14,whereas the yields of haloacetonitriles(HANs)and haloketones(HKs)were decreased.Either decreasing in the chlorine dosage and cleaning temperature or adjusting the pH of cleaning reagents toward acidic or alkaline could effectively reduce the toxic risks caused by DBPs.After the EPS extraction pretreatment,the formation of DBPs was accelerated in the first 12 h due to the damage of biofilm structure.Confocal laser scanning microscopy(CLSM)images showed that EPS,particularly polysaccharides,were highly resistant to chlorine and might be able to protect the cells exposed to chlorination. | Hao Wang Defang Ma Weiye Shi Zhiyu Yang Yun Cai Baoyu Gao | 2021 | Frontiers of Environmental Science & Engineering2021，15，5： | 0 |
| 10 | First-principles study on the conventional superconductivity of N-doped fcc-LuH_(3)显示文摘Recently,room-temperature superconductivity has been reported in a nitrogen-doped lutetium hydride at near-ambient pressure[Dasenbrock-Gammon et al.,Nature 615,244(2023)].The superconducting properties might arise from Fm3m-LuH_(3)−δNε.Here,we systematically study the phase diagram of Lu–N–H at 1 GPa using first-principles calculations,and we do not find any thermodynamically stable ternary compounds.In addition,we calculate the dynamic stability and superconducting properties of N-doped Fm3m-LuH_(3) using the virtual crystal approximation(VCA)and the supercell method.The R3m-Lu_(2)H_(5)N predicted using the supercell method could be dynamically stable at 50 GPa,with a T_(c) of 27 K.According to the VCA method,the highest T_(c) is 22 K,obtained with 1%N-doping at 30 GPa.Moreover,the doping of nitrogen atoms into Fm3m-LuH_(3) slightly enhances T_(c),but raises the dynamically stable pressure.Our theoretical results show that the T_(c) values of N-doped LuH_(3) estimated using the Allen–Dynes-modified McMillan equation are much lower than room temperature. | Zihao Huo Defang Duan Tiancheng Ma Zihan Zhang Qiwen Jiang Decheng An Hao Song Fubo Tian Tian Cui | 2023 | Matter and Radiation at Extremes2023，8，3： | 0 |
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