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Removal of Cd^(2+) from water by Friedel's salt (FS:3cao·A1_2O_3 ·CaCl_2 ·10H_2O): Sorption characteristics and mechanisms

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Journal of Environmental Sciences 2013年第9期25卷 1719-1725页

作者： Juanjuan Zhang He Zhao Hongbin cao Heping Li Zhibao Li Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences College of Chemical and Biologic Engineering Changsha University of Science and Technology National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology

The development of low-cost and efficient new mineral adsorbents has been a hot topic in recent years. In this study, Friedel＇s salt （FS：3cao·A12O3 ·CaCl2 ·10H2O）, a hexagonal layered inorganic absorbent, was synthesized to remove Cd2＋ from water. The adsorption process was simulated by Langmuir and Freundlich models. The adsorption mechanism was further analyzed with TEM, XRD, FT-IR analysis and monitoring of metal cations released and solution pH variation. The results indicated the adsorbent FS had an outstanding ability for Cd（Ⅱ） adsorption. The maximum adsorption capacity of the FS for Cd（Ⅱ） removal can reach up to 671.14 mg/g. The nearly equal numbers of Cd2＋ adsorbed and Ca2＋ released demonstrated that ion-exchange （both surface and inner） of the FS for Cd（Ⅱ） played an important role during the adsorption process. Furthermore, the surface of the FS after adsorption was microscopically disintegrated while the inner lamellar structure was almost unchanged. The behavior of Cd（Ⅱ） adsorption by FS was significantly affected by surface reactions. The mechanisms of Cd2＋ adsorption by the FS mainly included surface complexation and surface precipitation. In the present study, the adsorption process was fitted better by the Langmuir isotherm model （R2 = 0.9999） than the Freundlich isotherm model （R2 = 0.8122）. Finally, due to the high capacity for ion-exchange on the FS surface, FS is a promising layered inorganic adsorbent for the removal of Cd（Ⅱ） from water.

关键词： Friedel’s salt cadmium adsorption isotherm mechanism

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Carbon nanotube transistor technology for More-Moore scaling

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Nano Research 2021年第9期14卷 3051-3069页

作者： Qing cao Department of Materials Science and Engineering Department of Electrical and Computer EngineeringDepartment of Chemistry Seitz Materials Research LaboratoryUniversity of Illinois at Urbana-ChampaignUrbanaIL 61820USA

Scaling of silicon field-effect transistors has fueled the exponential development of microelectronics in the past 60 years,but is now close to its physical limits with the critical dimensions of state-of-the-art silicon devices approaching the sub-10 nm *** nanotubes have been suggested to hold great promise of replacing the central role of silicon in the next-generation logic switches with their unique geometrical and electrical *** this article,I firstly examine the scaling advantages of carbon nanotubes compared to silicon from technology-development perspective,and then review the latest progress on addressing the manufacturability issues for scaled carbon-nanotube transistors,from materials to device-integration ***,the possible pathways for nanotube transistors to transition into commercial applications are discussed.

关键词： carbon nanotube transistor scaling

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Zeros of Complete Symmetric Polynomials over Finite Fields

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Journal of Systems Science & Complexity 2024年第4期37卷 1772-1788页

作者： cao Wei School of Mathematics and Statistics Minnan Normal UniversityZhangzhou 363000China

Wan and Zhang(2021) obtained a nontrivial lower bound for the number of zeros of complete symmetric polynomials over finite fields,and proposed a problem whether their bound can be *** this paper,the author improves Wan-Zhang's bound from three *** proposed results are based on the estimates related to the number of certain permutations and the value sets of non-permutation polynomials associated to the complete symmetric *** the author believes that there are still possibilities to improve the bounds and hence Wan-Zhang's bound.

关键词： Complete symmetric polynomial finite field permutation polynomial value set

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Selective G6PDH inactivation for Helicobacter pylori eradication with transformed polysulfide

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Science China Life Sciences 2025年

作者： Xiaonan Wang Ning Zhou Xuejiao J.Gao Zijing Zhu Minmin Sun Qian Wang Haolin cao Xuetong Wu Caiyu Zhou Qingkang Zheng Ye Yuan Yuan Liu Lei Chen Jing Jiang Pengcheng Bu Lizeng Gao CAS Engineering Laboratory for Nanozyme Key Laboratory of Biomacromolecules Institute of Biophysics Chinese Academy of Sciences School of Life Sciences University of Chinese Academy of Sciences College of Chemistry and Chemical Engineering Jiangxi Normal University Key Laboratory of Epigenetic Regulation and Intervention Institute of Biophysics Chinese Academy of Sciences Nanozyme Laboratory in Zhongyuan School of Basic Medical Sciences Zhengzhou University Nanozyme Laboratory in Zhongyuan Henan Academy of Innovations in Medical Science

Alternative treatment for the highly prevalent Helicobacter pylori infection is imperative due to rising antibiotic resistance. We unexpectedly discovered that the anti-H. pylori component in garlic is hydrogen polysulfide（H2S_n, n≥2）, not organic polysulfides. Studies on the mechanism of action（MoA） show that H2S_nspecifically inactivates H. pylori glucose-6-phosphate dehydrogenase（G6PDH） by interfering with electron transfer from glucose-6-phosphate（G6P） to nicotinamide adenine dinucleotide phosphate（NADP+）. However, low H2S_nyield makes garlic derivatives hard to be a reliable donor of H2S_nto treat H. pylori infection. To address this challenge, we established a polysulfide transformation process from garlic organosulfur compounds into Fe3S4that generates H2S_nwith a 25–58 times increase in *** chitosan encapsulation, we designed a gastric-adaptive H2S_nmicroreactor（GAPSR） that eradicates H. pylori with 250 times higher efficiency under gastric conditions. A single GAPSR achieves more rapid H. pylori eradication than combined antibiotics therapy without disturbing the gut microbiota. These findings indicate a distinct MoA transformation mediated by polysulfide as an alternative candidate to treat H. pylori infection.

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具有医疗资源有限和Ornstein-Uhlenbeck过程的随机SIR传染病模型研究

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应用数学 2025年第1期38卷 170-181页

作者：刘晓虎曹虹聂麟飞新疆大学数学与系统科学学院新疆乌鲁木齐830017

基于医疗资源的有限性和疾病的传播规律,提出一类具有Ornstein-Uhlenbeck过程和一般发生率的随机SIR传染病模型.首先,讨论模型全局正解的存在唯一性并给出疾病灭绝性的充分条件.其次,通过构造合适的Lyapunov函数并应用It^o公式等方法,... 详细信息

基于医疗资源的有限性和疾病的传播规律,提出一类具有Ornstein-Uhlenbeck过程和一般发生率的随机SIR传染病模型.首先,讨论模型全局正解的存在唯一性并给出疾病灭绝性的充分条件.其次,通过构造合适的Lyapunov函数并应用It^o公式等方法,得到模型平稳分布的存在性.此外,通过求解Fokker-Planck方程,给出模型在拟地方病平衡点附近的密度函数的具体形式.最后通过数值模拟解释主要的理论结果并探讨随机扰动对疾病传播的影响.

关键词：随机传染病模型医疗资源有限灭绝性平稳分布概率密度函数

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大跨度钢混组合梁斜拉桥钢锚梁制造关键技术

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山西建筑 2025年第2期51卷 183-186页

作者：曹军文陕西西安710000

结合公司近几年生产制造的大跨度钢混组合梁斜拉桥钢锚梁结构,以禹门口黄河大桥为例,介绍了钢锚梁结构组成,分析了大跨度钢混组合梁斜拉桥钢锚梁制造重难点,针对该项目钢锚梁结构复杂、熔透焊缝多的特点,论述了大跨度钢混组合梁斜拉桥... 详细信息

结合公司近几年生产制造的大跨度钢混组合梁斜拉桥钢锚梁结构,以禹门口黄河大桥为例,介绍了钢锚梁结构组成,分析了大跨度钢混组合梁斜拉桥钢锚梁制造重难点,针对该项目钢锚梁结构复杂、熔透焊缝多的特点,论述了大跨度钢混组合梁斜拉桥钢锚梁的制造关键技术,解决了加工制造过程中焊接变形及尺寸精度控制等诸多技术难题。

关键词：钢混组合梁斜拉桥钢锚梁制造关键技术

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Counteraction of ABA-Mediated Inhibition of Seed Germination and Seedling Establishment by ABA Signaling Terminator in Arabidopsis

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Molecular Plant 2020年第9期13卷 1284-1297页

作者： zhijuan Wang Ziyin Ren Chunhong Cheng Tao Wang Hongtao Ji Yang Zhao Zhiping Deng Liya Zhi Jingjing Lu Xinying Wu Shimin Xu Mengmeng cao Hongtao Zhao Liu Liu Jiankang Zhu Xia Li National Key Laboratory of Crop Genetic Improvement College of Plant Science and TechnologyHuazhong Agricultural UniversityWuhanHubei 430070P.R.China Center of Agricultural Resources Research Institute of Genetics and Developmental BiologyChinese Academy of SciencesShijiazhuangHebei 050021P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China Shanghai Center for Plant Stress Biology Chinese Academy of SciencesShanghai Institutes for Biological SciencesShanghai 200032P.R.China Department of Horticulture and Landscape Architecture Purdue UniversityWest LafayetteIN 47907USA State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products Institute of Virology and BiotechnologyZhejiang Academy of Agricultural SciencesHangzhouZhejiang 3210021P.R.China College of Life Science and Technology Yangtze Normal UniversityChongqingP.R.China Key Laboratory of Mental Health Institute of PsychologyChinese Academy of SciencesBeijingP.R.China College of Life Sciences in Hebei Normal University ShijiazhuangHebei 050024P.R.China

Seed germination and seedling establishment are important for the reproductive success of plants,but seeds and seedlings typically encounter constantly changing environmental *** inhibiting seed germination and post-germinative growth through the PYR1/PYL/RCAR ABA receptors and PP2C co-receptors,the phytohormone abscisic acid(ABA)prevents premature germination and seedling growth under unfavorable ***,little is known about how the ABA-mediated inhibition of seed germination and seedling establishment is ***,we report that ABA Signaling Terminator(ABT),a WD40 protein,efficiently switches off ABA signaling and is critical for seed germination and seedling *** is induced by ABA in a PYR1/PYL/RCAR-PP2C-dependent *** of ABT promotes seed germination and seedling greening in the presence of ABA,whereas knockout of ABT has the opposite *** found that ABT interacts with the PYR1/PYL/RCAR and PP2C proteins,interferes with the interaction between PYR1/PYL4 and ABI1/ABI2,and hampers the inhibition of ABI1/ABI2 by ABA-bound PYR1/PYL4,thereby terminating ABA *** together,our results reveal a core mechanism of ABA signaling termination that is critical for seed germination and seedling establishment in Arabidopsis.

关键词： ABA ABT ABA signaling PYR1/PYL7RCAR-ABA-PP2Cs complex seed germination post-germinative development

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Guest-assisted assembly strategy:boosting solvent-processed organic solar cells toward commercialization

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Science China Chemistry 2022年第4期65卷 645-646页

作者： Yong cao State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and DevicesInstitute of Optoelectronic Materials and DevicesSouth China University of TechnologyGuangzhou 510640China

In recent years, due to the increasing demand for green energy, organic/polymer heterojunction solar cells have aroused great interest in the academic and industrial ***/polymer solar cells (OSCs) have a series of advantages over their counterparts. The morphology of the active layer and the energy band structure of the device can be adjusted easily by changing the molecular ***-area low-cost modules can be prepared by roll-to-roll solution printing at room temperature.

关键词： temperature structure polymer

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Replacing PVP by macrocycle cucurbit[6]uril to cap sub-5 nm Pd nanocubes as highly active and durable catalyst for ethanol electrooxidation

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Nano Research 2019年第10期12卷 2628-2633页

作者： Dongshuang Wu Minna cao Rong cao State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

Pd nano cubes(NCs)en closed by six{100}facets are fasci nating model materials for both fun dame ntal studies and practical applicati ***,the only available method to prepare well-defined sub-10 nm Pd NCs was developed by Xia et *** than 10 years ago,un avoidably using polyvinyl pyrrol id one(PVP)polymer to preve nt particle aggregati *** strongly adsorbed PVP extremely deteriorates the catalysts*efficiency because of the high coverage of accessible surface-active *** efforts have been devoted to replacing PVP with weaker capping agents but with limited progress predominately due to the difficulties in tuning the growth kinetics of Pd *** the first time,we report that macrocycle cucurbit[6]uril(CB[6])can replace PVP in the synthesis of Pd NCs by dedicatedly controlling the growth ***[6]capped Pd NCs showed 1.1-1.5 times in creased specific surface area compared to the surfactant-free commercial Pd ***,X-ray photoelectron spectroscopy dem on strated the modified electronic structure of Pd NCs through the carb onyl group of CB[6].Consequently,compared to the commercial catalysts,the obtained Pd NCs exhibited 7 times higher current density towards ethanol oxidation ***,after 17 h of continuous work,it reduced deactivation by up to 1-4 orders of magnitude.

关键词： palladium cucurbituril nanocubes ethanol oxidation fuel cells

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Merging game theory and control theory in the era of AI and autonomy

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National Science Review 2020年第7期7卷 1122-1124页

作者： Ming cao Faculty of Science and Engineering University of Groningen

Game theory and control theory, each powerful in its own right, can nourish each other in the focused area of intelligent and autonomous decision-making processes. In fact, the two theories enhancing each other is a m... 详细信息

关键词： Control theory

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