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Transforming waste particles into valuable adsorbents via amyloid-mediated molecular engineering

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Science China Chemistry 2025年第01期 317-328页

作者： Qingmin Yang jian zhao Yujia Zhang Xingyu zhou Hao Ren Bowen Hu Zhongli Lei Lixin chen Peng Yang School of Material and Chemical Engineering Bengbu University Anhui Provincial Engineering Laboratory of Silicon-Based Materials School of Chemistry and Chemical Engineering Northwestern Polytechnical University Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical EngineeringShaanxi Normal University Xi'an Key Laboratory of Polymeric Soft Matter School of Chemistry and Chemical Engineering Shaanxi Normal University International Joint Research Center on Functional Fiber and Soft Smart Textile School of Chemistry and Chemical EngineeringShaanxi Normal University

The high-value utilization of industrial solid waste using a facile and eco-friendly process is of great interest and significance in reducing environmental pollution and developing a green circular economy. Herein, we propose an amyloid-mediated molecular engineering strategy to transform particulate waste into valuable adsorbents for metal ions. Our method has the advantage of aqueous solution fabrication under mild conditions without the use of high-temperature hydrothermal methods and toxic chemical reagents. Amyloid-mediated molecular engineering manipulates the phase transition of bovine serum albumin(BSA)on particulate waste surfaces, resulting in a remarkable ～3.1 times improvement in the adsorption capacity of fly ash, a typical industrial solid waste for gold ions after modification with the phase-transitioned BSA(PTB). The resultant adsorption ability was 69–1,980 times higher than those of conventional and emerging adsorbent materials such as ion exchange resins, activated carbon(AC), covalent organic frameworks(COFs), and metal-organic frameworks(MOFs). We further demonstrated the application of our PTB-modified materials in the recovery of precious metals from low-grade gold ore and electronic waste leachates. Consequently, this strategy could increase the value of waste materials nearly 27 times. In addition, this method is generally extendable to other conventional industrial adsorbents such as resin, clay, and Al2O3, and enhances their adsorption capabilities at least twofold. Overall, this work provides a simple and green approach for improving the adsorption performance of solid particles, and is expected to develop into a universal strategy for transforming waste particles into high-value-added products.

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RESERVOIR SEDIMENTATION AND TRANSFORMATION OF MORPHO-LOGY IN THE LOWER YELLOW RIVER DURING 10 YEAR'S INITIAL OPERATION OF THE XIAOLANGDI RESERVOIR

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Journal of Hydrodynamics 2012年第6期24卷 914-924页

作者： chen jian-guo zhou Wen-hao chen qiang International Research and Training Center on Erosion and Sedimentation(IRTCRS) China Institute of Water Resources and Hydropower Research(IWHR)

The Xiaolangdi Hydro-Project is one of the large projects on the main stem of the Middle Yellow River. It has been operated for more than 10 years, since its impoundment in October, 1999. The reservoir has trapped 2.833 × 10^9 m3 of sediment, and caused the total erosion of 1.891 × 10^9t in the Lower Yellow River from October, 1999 through October, 2010. Not only the serious atrophied situation of the Lower Yellow River （LYR） has been resuscitating, but also many new phenomena of sediment transport and behaviors of channel re-establishing are coming into being. They are illustrated and discussed in detail in this paper.

关键词： reservoir sedimentation density current water-sediment regulation artificial flood channel siltation and erosion,erosion efficiency river configuration

Recent progress in metal-organic frameworks(Part II—material application)

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Science China Chemistry 2025年

作者： jiandong Pang Wentao jiang Xue-Wen Zhang Hao-Long zhou Yuxiu Sun Wei Gong Bin Wang Fuyin Ma Linwei He Long chen qiang chen He-Qi Zheng Yuanjing Cui Wen-Jie Shi Chao Zhang Mei Wang Yue-Biao Zhang Jie-Peng Zhang Chongli Zhong Yong Cui Shuao Wang jian-Rong Li Guodong Qian Tong-Bu Lu Huan Pang Xian-He Bu Institute for New Energy Materials and Low Carbon Technologies School of Materials Science and Engineering Tianjin University of Technology School of Chemistry and Chemical Engineering Yangzhou University School of Materials Science and Engineering Nankai University School of Physical Science and Technology ShanghaiTech University MOE Key Laboratory of Bioinorganic and Synthetic Chemistry GBRCE for Functional Molecular Engineering School of Chemistry IGCMESun Yat-sen University Department of Chemistry Shantou University School of Chemical Engineering and Technology Tiangong University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences Soochow University College of Materials Science & Engineering Beijing University of Technology State Key Laboratory of Silicon and Advanced Semiconductor Materials Cyrus Tang Center for Sensor Materials and ApplicationsSchool of Materials Science & Engineering Zhejiang University

As a class of functional crystalline porous materials, metal-organic frameworks(MOFs) gained rapid development in the past three decades and a large number of MOFs with ordered structures, high surface areas, and functionalized channels have been investigated. MOFs and MOF-derived/composite materials show great potential in many application fields. In this review, we discussed the main applications of MOFs and MOF-derived/composite materials in small molecule storage, separation, luminescence, sensing, multitype catalysis, and energy storage. In addition, challenges and problems in the future research of MOFsrelated fields are also discussed.

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Ethoxylation of Phenols Catalyzed by Metal-Free Lewis Pairs:Living/Controlled Polymerization in a Slow-lnitiation Mode

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Chinese Journal of Chemistry 2021年第9期39卷 2579-2587页

作者： qiang Zhang Yubo zhou Ye chen Junpeng zhao Faculty of Materials Science and Engineering South China University of TechnologyGuangzhouGuangdong 510640China Key Laboratory of Luminescence from Molecular Aggregates of Guangdong Province South China University of TechnologyGuangzhouGuangdong 510640China

Phenols,in stead of con venti onal alcoholic compounds,are used to in itiate ring-openi ng polymerizati on(ROP)of ethyle neoxide and propyle ne oxide in bulk at room temperature in cooperati on with the recently prevaili ng bicompone nt metal-free catalyst comprising an organobase and *** and DFT calculation results both point out that due to the lower nucleophilicity of the initiating(phe no late)species than the propagating(alcoholate)species,chai n initiat ion is distinctly slower tha n propagation and the difference becomes eve n larger as the acidity of the phe nolic in itiator ***,we 11-defi ned polyethers with expected molar mass,low dispersity,and high end-group fidelity are afforded substa ntiating that the ROP is living/c on trolled in spite of the slow *** of product composition indicates that the reaction on alcoholates(i.e.,propagation)is effectively inhib-ited by the unreacted phenols during the initiation step because of the adequately large acidity differenee,which is key to the success of the slow-initiation living/controlled *** acidity difference betwee n phe nol and alcohol also facilitates the fulfill-ment of highly selective phenolysis of epoxides,a"1+1"type addition reaction between phenol and epoxide(in excess)rather than the"1+n"type ROP reaction,by use of a milder organobase and decreased Lewis acid/base ratio.

关键词： Ring-opening polymerization Organocatalysis Lewis bases Ethoxylation Phenol

A cross-layer design approach on spectrum allocation and resource scheduling in cognitive PMP networks

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第4期9卷 435-444页

作者： Jie chen Min-jian zhao Qiao zhou Shi-ju LI Department of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China

We propose the spectrum allocation and resource scheduling algorithms in cognitive point to multipoint (PMP) networks with rapid changes of spectrum opportunities and present a media access control (MAC) protocol based on these algorithms. The objective of spectrum allocation is to make efficient use of the spectrum while maintaining the transceiver synchronization on frequency and time in the network. The objective of resource scheduling is to guarantee the quality of service (QoS) requirements of different kinds of connections and to minimize the total energy consumption in the network as well. By sensing only a small set of possible channels in each slot based on the state transition probability of each channel, our spectrum allocation algorithm achieves high spectrum efficiency in the network. The resource scheduling problem is divided into three sub problems and we derive optimal solutions to these problems by greedy algorithm and convex optimization. The simulation results show that our algorithm can make efficient use of the spectrum and the network resources at a cost of low computational complexity.

关键词： Cognitive point to multipoint (PMP) networks Markov process Cross-layer design Convex optimization

From plant immunity to crop disease resistance

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Journal of Genetics and Genomics 2022年第8期49卷 693-703页

作者： Yan zhao Xiaobo Zhu Xuewei chen jian-Min zhou State Key Laboratory of Plant Genomics Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China Sichuan Agricultural University at WenjiangChengduSichuan 611130China CAS Center for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijing 100049China Hainan Yazhou Bay Seed Laboratory SanyaHainan 572025China

Plant diseases caused by diverse pathogens lead to a serious reduction in crop yield and threaten food security *** improvement of plant immunity is considered as the most effective and sustainable approach to control crop *** the last decade,our understanding of plant immunity at both molecular and genomic levels has improved *** with advances in biotechnologies,particularly clustered regularly interspaced short palindromic repeat(CRISPR)/Cas9-based genome editing,we can now rapidly identify new resistance genes and engineer disease-resistance crop plants like never *** this review,we summarize the current knowledge of plant immunity and outline existing and new strategies for disease resistance improvement in crop *** also discuss existing challenges in this field and suggest directions for future studies.

关键词： Plant immunity Disease resistance Resistance genes Molecular breeding Genetic engineering Crops

An oversize correction method of dry density for non-cohesive soils filling the embankment of high-speed railway

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Science China(Technological Sciences) 2015年第2期58卷 211-218页

作者： chen jian LUO qiang jianG Liang Wei ZHANG Liang zhao Min Zhi MOE Key Laboratory of High-Speed Railway Engineering Southwest Jiaotong University

Non-cohesive soils have been widely used in construction of high-speed railway for their excellent physical and mechanical properties,and the determination of maximum and minimum dry density of such soils containing oversize particles is an important *** this study,the influence of oversize particles on dry density of non-cohesive soils is investigated by packing *** results show that oversize particles will make"extra"voids around their surfaces,which increase significantly if the size ratio of oversize material to matrix material is not very *** dry density of the total material will be overestimated by Elimination Method due to the omission of the"extra"***,a geometric model is proposed by which the"extra"voids can be taken into account,and a new oversize correction method for non-cohesive soils is *** results confirm the applicability of this method on the condition of oversize fraction being less than 40%by mass.

关键词： high-speed railway oversize correction non-cohesive soils density embankment

A methylated-DNA-binding complex required for plant development mediates transcriptional activation of promoter methylated genes

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Journal of Integrative Plant Biology 2019年第2期61卷 120-139页

作者： qiang-qiang zhao Rong-Nan Lin Lin Li She chen Xin-jian He National Institute of Biological Sciences Graduate School of Peking Union Medical College

Although the mechanism of DNA methylationmediated gene silencing is extensively studied, relatively little is known about how promoter methylated genes are protected from transcriptional silencing. SUVH1, an Arabidopsis Su(var)3-9 homolog, was previously shown to be required for the expression of a few promoter methylated genes. By chromatin immunoprecipitation combined with sequencing, we demonstrate that SUVH1 binds to methylated genomic loci targeted by RNA-directed DNA methylation. SUVH1 and its homolog SUVH3 function partially redundantly and interact with three DNAJ domain-containing homologs, SDJ1, SDJ2, and SDJ3, thus forming a complex which we named SUVH-SDJ. The SUVH-SDJ complex components are co-localized in a large number of methylated promoters and are required for the expression of a subset of promoter methylated genes. We demonstrate that the SUVHSDJ complex components have transcriptional activation activity. SUVH1 and SUVH3 function synergistically with SDJ1,SDJ2, and SDJ3 and are required for plant viability. This study reveals how the SUVH-SDJ complex protects promoter methylated genes from transcriptional silencing and suggests that the transcriptional activation of promoter methylated genes mediated by the SUVH-SDJ complex may play a critical role in plant growth and development.

关键词： A methylated-DNA-binding complex required for plant development mediates transcriptional activation of promoter methylated genes Figure DNA

Effect of microstructure evolution on Luders strain and tensile properties in an intercritical annealing medium-Mn steel

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Journal of Iron and Steel Research International 2021年第6期28卷 762-772页

作者： Shuai Wang Wei-jian chen Zheng-zhi zhao Xiao-long zhao Xiao-yang Luo qiang Wang Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China Beijing Laboratory for Modern Transportation Advanced Metal Materials and Processing Technology University of Science and Technology BeijingBeijing 100083China Carbon Steel and Thin Slab Factory of Hongxing Iron and Steel Co. Ltd.Jiuquan Iron and Steel GroupJiayuguan 735100GansuChina

The influence of microstructural characteristics on Lu¨ders strain and mechanical properties was explored by means of altering thermo-mechanical circumstances in an intercritical annealing(IA)medium-Mn Fe-11Mn-0.09C-0.25Si(wt.%)*** IA of cold-rolled samples with severe plastic deformation,exclusively equiaxed dual phases were obtained because of active recovery and *** equiaxed austenite(gamma E)with a larger size and inadequate chemical concentration was more readily transformed into martensite,and subsequent transformation-induced plasticity(TRIP)effect was triggered actively at relatively higher IA temperature,lessening localized *** addition,grown-in dislocations were prone to multiply and migrate around a broad mean free path for coarser equiaxed ferrite(alpha E)due to weakening dynamic recovery;therefore,it was the ensuing increased mobility of dislocations instead of reserving plentiful initial dislocation density that facilitated the propagation velocity of Luders bands and the accumulation of work *** contrast,the bimodal-grained microstructure with lath-like and equiaxed austenite(gamma L+gamma E)satisfactorily contributed to a smaller yield point elongation(YPE)without compromise of comprehensive mechanical properties on the grounds that austenitic gradient stability gave rise to discontinuous but sustainable TRIP effect and incremental work ***,Luders strain is closely related to the absence of work hardening in the region which yields *** follows that the decreased stability of retained austenite,favorable mobility of dislocations and the bimodal-grained structure all prominently make up for the insufficiency of work hardening,thereof resulting in a limited YPE.

关键词： Luders strain Medium-Mn steel Work hardening Dislocation Mechanical property