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Bioresorbable magnesium-based alloys containing strontium doped nanohydroxyapatite promotes bone healing in critical sized bone defect in rat femur shaft

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Journal of Magnesium and Alloys 2023年第1期11卷 270-286页

作者： Shazia Shaikh Irfan Qayoom R.Sarvesha Ashok Kumar Department of biological Sciences and Bioengineering Indian Institute of Technology KanpurKanpur 208016India Centre for environmental Science and Engineering Indian Institute of Technology KanpurKanpur 208016India Department of Materials Science and Engineering Indian Institute of Technology KanpurKanpur 208016India center for Nanosciences Indian Institute of Technology KanpurKanpur 208016India The Mehta Family Centre for Engineering in Medicine Indian Institute of Technology KanpurKanpur 208016India

Magnesium-based biomaterials have been in extensive research for orthopedic applications for decades due to their optimal mechanical features and osteopromotive nature;nevertheless,rapid degradation restricts their clinical *** this study,pristine magnesium was purified(P-Mg)using a melt self-purification approach and reinforced using indigenously synthesized nanohydroxyapatite(HAP,0.6 wt.%)and strontium substituted nanohydroxyapatite(SrHAP,0.6 wt.%)using a low-cost stir assisted squeeze casting method to control their degradation *** electron back-scattered diffraction(EBSD)and X-ray diffraction(XRD)examinations,all casted materials were carefully evaluated for microstructure and phase *** characteristics,in vitro degradation,and in vitro biocompatibility with murine pre-osteoblasts were also tested on the fabricated *** in vivo examination of bone formation,osteointegration,and degradation rate,the magnesium-based alloys were fabricated as small cylindrical pins with a diameter of 2.7 mm and a height of 2 *** pins were implanted in a critical-sized defect in a rat femur shaft(2.7 mm diameter and 2 mm depth)for 8 weeks and evaluated by microCT and histological evaluation for bone growth and *** compared to P-Mg and P-MgHAP,micro-CT and histological analyses revealed that the P-MgSrHAP group had the highest bone formation towards the periphery of the implant and hence maximum *** the removed pins from the bone defect were analyzed using GIXRD,they displayed hydroxyapatite peaks that were consistent with *** P-Mg,P-MgHAP,and P-MgSrHAP 8 weeks after implantation,in vivo degradation rates derived from micro-CT were around 0.6 mm/year,0.5 mm/year,and 0.1 mm/year,***,P-MgSrHAP possesses the requisite degradation rate as well as sufficient mechanical and biological properties,indicating that it has the potential to be used in the development/fabrication of bi

关键词： Magnesium purification Reinforcement Degradation rate Nanocement Bone regeneration

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Nanofiltration for drinking water treatment: a review

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Frontiers of Chemical Science and Engineering 2022年第5期16卷 681-698页

作者： Hao Guo Xianhui Li Wulin Yang Zhikan Yao Ying Mei Lu Elfa Peng Zhe Yang Senlin Shao Chuyang Y.Tang Membrane-based environmental&Sustainable technology(MembEST)Group Department of Civil EngineeringThe University of Hong KongHong KongChina Key Laboratory for City Cluster environmental Safety and Green Development of the Ministry of Education Institute of Environmental and Ecological EngineeringGuangdong University of TechnologyGuangzhou 510006China College of environmental Science and Engineering Peking UniversityBeijing 100871China College of Chemical and biological Engineering Zhejiang UniversityHangzhou 310027China Research and Development center for Watershed environmental Eco-Engineering Advanced Institute of Natural SciencesBeijing Normal UniversityZhuhai 519087China School of Civil Engineering Wuhan UniversityWuhan 430072China

In recent decades,nanofiltration(NF)is considered as a promising separation technique to produce drinking water from different types of water *** this paper,we comprehensively reviewed the progress of NFbased drinking water treatment,through summarizing the development of materials/fabrication and applications of NF membranes in various scenarios including surface water treatment,groundwater treatment,water reuse,brackish water treatment,and point of use *** not only summarized the removal of target major pollutants(e.g.,hardness,pathogen,and natural organic matter),but also paid attention to the removal of micropollutants of major concern(e.g.,disinfection byproducts,per-and polyfluoroalkyl substances,and arsenic).We highlighted that,for different applications,fit-for-purpose design is needed to improve the separation capability for target compounds of NF membranes in addition to their removal of *** and perspectives on membrane fouling control,chlorine resistance,integrity,and selectivity are also discussed to provide potential insights for future development of high-efficiency NF membranes for stable and reliable drinking water treatment.

关键词： nanofiltration drinking water disinfection byproducts micropollutants selectivity

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Synergistic CO_(2)reduction and tetracycline degradation by CuInZnS-Ti_(3)C_(2)T_(x)in one photoredox cycle

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Nano Research 2022年第9期15卷 8010-8018页

作者： Lijing Wang Zhan Zhang Renquan Guan Dandan Wu Weilong Shi Limin Yu Pan Li Wei Wei Zhao Zhao Zaicheng Sun Henan Engineering center of New Energy Battery Materials Henan D&A Engineering Center of Advanced Battery MaterialsCollege of Chemistry and Chemical EngineeringInstitute of Architectural EngineeringShangqiu Normal UniversityShangqiu 476000China Faculty of Physics Faculty of ChemistryNortheast Normal UniversityChangchun 130024China center of excellence for environmental safety and biological effects Beijing Key Lab for Green Catalysis and SeparationDepartment of Chemistry and Chemical EngineeringCollege of Environmental and Energy EngineeringBeijing University of TechnologyBeijing 100124China School of Material Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

Optimizing photocatalytic CO_(2)reduction with simultaneous pollutant degradation is highly ***,the photocatalytic efficiency is restricted by the unmatched redox ability,high carriers’recombination rate,and lack of reactive sites of the present ***,the CuInZnS-Ti_(3)C_(2)T_(x)hybrid with matched redox ability and suitable CO_(2)adsorption property was rationally *** nucleation and growth process of CuInZnS was interfered by the addition of Ti_(3)C_(2)T_(x)with a negative charge,resulting in thinner nanosheets and richer reactive ***,the Schottky heterojunction built in the hybrid simultaneously improved the photoexcited charge transfer property,sunlight absorption range,and CO_(2)adsorption ***,upon exposure to sunlight,CuInZnS-Ti_(3)C_(2)T_(x)exhibited an efficient photocatalytic CO_(2)reduction performance(10.2μmol·h^(−1)·g^(−1))with synergetic tetracycline degradation,obviously higher than that of pure *** on the combination of theoretical calculation and experimental characterization,the photocatalytic mechanism was investigated *** work offers a reference for the remission of worldwide energy shortage and environmental pollution problems.

关键词： CuInZnS-Ti_(3)C_(2)T_(x) photocatalysis CO_(2)reduction tetracycline degradation

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Advancing sustainable agriculture: Enhancing crop nutrition with next-generation nanotech-based fertilizers

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Nano Research 2023年第12期16卷 13205-13225页

作者： Yiwen Liao Dawei Xu Yuhong Cao Yong-Guan Zhu State Key Laboratory of Urban and Regional Ecology Research Centre for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China CAS Key Laboratory for biological Effects of Nanomaterials and Nanosafety National Center for Nanoscience and TechnologyBeijing 100190China

The pressing need to enhance nutrient use efficiency(NUE)in fertilizers has become increasingly urgent in light of food insecurity and climate-related *** offers promising prospects for the development of effective and environmentally friendly alternatives in the field of *** review focuses on the impact of nanotechnology on conventional fertilizers,encompassing inorganic,organic,and microbial *** emphasize the superior attributes of nano-fertilizers compared with their conventional counterparts and explore their potential and versatility in boosting crop productivity,reducing fertilizer expenses,and mitigating detrimental environmental *** conclusion,given the significant challenges posed by food insecurity and climate change,the application of nano-fertilizers demonstrates immense potential for advancing sustainable and intelligent agricultural practices.

关键词： nanobiotechnology nano-fertilizers(NFs) nutrient use efficiency(NUE) slow release sustainable agriculture

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Chinese young people’s perceptions and preferences with regard to various edible urban plants

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2023年第4期24卷 359-365页

作者： Wenzhu ZHANG Zhaoming LI Jingxian CUI Lingshan WANG Hui LIU Hong LIU Institute of environmental Biology and Life Support technology Beijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringBeihang UniversityBeijing 100083China Internet Joint Research center of Aerospace Biotechnology&Medical Engineering Beihang UniversityBeijing 100083China

The World Health Organization(WHO)defines health as“a state of complete physical,mental and social well-being and not merely the absence of disease or infirmity”(WHO,2017),and mental health is defined as not only the absence of mental illness,but also the presence of psychological *** expanding body of evidence highlights the relationship between nature(such as urban greenspace)and health(Li et al.,2019;Flaxman et al.,2020).

关键词： urban expanding absence

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Carbonitride MXene Ti_(3)CN(OH)_(x)@MoS_(2)hybrids as efficient electrocatalyst for enhanced hydrogen evolution

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Nano Research 2023年第4期16卷 4656-4663页

作者： Jizhou Jiang Fangyi Li Saishuai Bai Yongjing Wang Kun Xiang Haitao Wang Jing Zou Jyh-Ping Hsu School of environmental Ecology and biological Engineering School of Chemistry and Environmental EngineeringKey Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationNovel Catalytic Materials of Hubei Engineering Research CenterWuhan Institute of TechnologyWuhan 430205China Department of Chemical Engineering “National Taiwan University”Taipei 10617

Renewable energy powered electrocatalytic water splitting is a promising strategy for hydrogen generation,and the design and development of high-efficiency and earth-abundant electrocatalysts for hydrogen evolution reaction(HER)are highly ***,MoS2 nanoflowers decorated two-dimensional carbonitride-based MXene Ti3CN(OH)x hybrids have been constructed by etching and post-hydrothermal *** electrochemical performance of the as-obtained Ti_(3)CN(OH)_(x)@MoS_(2)hybrids having a quasi core-shell structure is fascinating:An overpotential of 120 mV and a Tafel slope of 64 mV∙dec^(−1)can be delivered at a current density of 10 mA∙cm^(−2).And after 3,000 cyclic voltammetry cycles,it can be seen that there is no apparent *** the experimental results and density functional theory(DFT)calculations indicate that the synergetic effects between Ti_(3)CN(OH)x and MoS_(2)are responsible for the robust electrochemical HER *** electrons of-OH group in Ti_(3)CN(OH)x are transferred to MoS_(2),making the adsorption energy of the composite for H almost *** metallic Ti_(3)CN(OH)x is also beneficial to the fast charge transfer *** construction of MXene-based hybrids with optimal electronic structure and unique morphology tailored to the applications can be further used in other promising energy storage and conversion devices.

关键词： Ti_(3)CN(OH)x MoS_(2) hydrogen evolution reaction density functional theory(DFT)calculations

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Wettability control of defective TiO_(2)with alkyl acid for highly efficient photocatalytic ammonia synthesis

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Nano Research 2023年第8期16卷 10770-10778页

作者： Renquan Guan Xueying Cheng Yunning Chen Zhengkai Wu Zhao Zhao Qingkun Shang Yingnan Sun Zaicheng Sun Faculty of Chemistry Northeast Normal UniversityChangchun 130024China Faculty of Physics Northeast Normal UniversityChangchun 130024China Instrumental Analysis center Yancheng Teachers UniversityYancheng 224007China center of excellence for environmental safety and biological effects Beijing Key Lab for Green Catalysis and SeparationFaculty of Environment and lifeBeijing University of TechnologyBeijing 100124China

Ammonia is an important chemical raw material and non-carbon-based *** ammonia production technology as a mild alternative to the traditional Harbor–Bosch route is carried out at the air,liquid,and solid three-phase *** the activation of N_(2),depressing hydrogen evolution reaction(HER),and increasing the local N_(2) concentration around the catalyst surface are critical factors in achieving high conversion *** this paper,we proposed that defective TiO_(2)is surfacemodified by alkyl acids with different carbon chain lengths(C_(2),C_(5),C_(8),C_(11),and C_(14))to tune the catalyst surface *** defect sites greatly promote N_(2) adsorption and *** wettability of the catalyst can be regulated from hydrophilic to hydrophobic by the length of the alkyl *** hydrophobic surface enhances the N_(2) adsorption and increases the local N_(2) concentration due to its ***,it depresses the proton adsorption and ***,the nitrogen reduction reaction(NRR)is greatly *** the series of samples,they present a systematic change and have a maximal NRR performance for n-octanoic acid-defective TiO_(2)(C8-Vo-TiO_(2);Vo=oxygen vacancy).The rate of ammonia production can be as high as 392μmol·g^(−1)·h^(−1).This work provides a new strategy for efficient ammonia synthesis at the three-phase interface using photocatalyst technology.

关键词： aerophilic modification alkyl acids defective TiO_(2) photocatalytic ammonia synthesis

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Synthesis and Crystal Structure of N-((6-chloropyridin-3-yl)methyl)-6-ethoxy-N-ethyl-3-nitropyridin-2-amine

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Chinese Journal of Structural Chemistry 2012年第5期31卷 621-624页

作者：吴道新刘民华柳爱平黄明智胡志彬任叶果刘兴平唐明左文清 School of Chemistry and biological Engineering Changsha University of Science and Technology National Engineering Research center for agrochemicals Hunan Research Institute of Chemical Industry College of Chemical Engineering Xiangtan University

The title compound N-（（6-chloropyridin-3-yl）methyl）-6-ethoxy-N-ethyl-3-nitropyri-din-2-amine（4） was synthesized by reacting the mixture of 6-chloro-2-ethoxy-3-nitropyridine（1） and 2-chloro-6-ethoxy-3-nitropyridine（2） with 3,and its structure was determined by X-ray single-crystal *** crystal belongs to the monoclinic system,space group P21/n with a = 7.3441（2）,b = 9.9041（3）,c = 11.7368（3） ,α = 101.410（2）,β = 102.1340（10）,γ = 99.594（2）o,μ = 0.260 mm^-1,Mr = 336.78,V = 798.58（4）（A°）^3,Z = 2,Dc = 1.401g/cm^3,F（000） = 352,T = 296（2） K,R = 0.0210 and wR = 0.1053.

关键词： synthesis crystal structure N-((6-chloropyridin-3-yl)methyl)-6-ethoxy-N-ethyl-3-nitropyridin-2-amine insecticidal and fungicidal activities

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A multi-omics technology to the study of lactic acid bacteria responses to environmental stress: the past， current and future trends

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Food Science and Human Wellness 2024年

作者： Yaqi Liu Wen Ma Gang Jin Wine Research Institute Ningxia University Engineering Research center of Grape and Wine Ministry of Education

Lactic acid bacteria and the fermentation environment interact to form an intertwined system. Lactic acid bacteria are constantly evolving to adapt to different fermentation environments， causing changes in their physiological processes. To achieve a targeted improvement of their adaptability to various environments， a detail analysis of their evolutionary physiological processes is required. While several studies have been carried out in the past by using single-omics techniques to investigate their response to environmental stress， most researchers are now using a multi-omics approach to explore more detail in the biological regulatory networks and molecular mechanisms of lactic acid bacteria in response to environmental stress， thereby overcoming the limitations of single- omics analysis. Scope and approach: In this review， we describe the various single-omics approaches that have been used to study environmental stress in lactic acid bacteria， present the advantages of various multi-omics combined analysis approaches， and discuss the potential and practicality of applying emerging single-cell transcriptomics and single-cell metabolomics techniques to the molecular mechanism study of microbes response to environmental stress. Key ?ndings and conclusions: Multi-omics approaches enable the accurate identification of complex microbial physiological processes in different environments， allow people to comprehensively reveal the molecular mechanisms of microbes response to stress from different perspectives. Single-cell omics techniques， analyze the targeted regulation of microbial functions in a multi-dimensional space， provides a new perspective on understanding microbes responses environment stress.

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Surface hydrophobic modification enhanced catalytic performance of electrochemical nitrogen reduction reaction

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Nano Research 2022年第5期15卷 3886-3893页

作者： Lijuan Niu Ziwen Liu Guohua Liu Mengxuan Li Xupeng Zong Dandan Wang Li An Dan Qu Xiaoming Sun Xiayan Wang Zaicheng Sun Beijing Key Laboratory for Green Catalysis and Separation Center of Excellence for Environmental Safety and Biological EffectsFaculty of Environment and LifeBeijing University of TechnologyBeijing 100124China State Key Laboratory of Chemical Resource Engineering College of Energy Beijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education Jilin Normal UniversityChangchun 130103China

Electrocatalytic nitrogen reduction reaction(NRR)is a sustainable approach for NH_(3)production with low energy ***,competing hydrogen reduction reaction(HER)in aqueous solution results in low NH_(3)production and Faraday efficiency(FE).Here,MoS_(2)nanostructures with a hydrophobic surface are synthesized by alkyl thiols *** and hydrophobic surface facilitates an efficient three-phase contact of N_(2),H_(2)O,and ***,localized concentrated N_(2)molecules can overcome the mass transfer limitation of N2 and depress the HER due to lowering the proton *** the active-sites decrease with the increase of the alkyl chain since the thiol may cover the active site,the optimized electrocatalyst achieves NH_(3)yield of 12.86×10^(-11)mol·cm^(-2)·s^(-1)at-0.25 V and 22.23%FE,which are 4.3 and 24 times higher than those of MoS2-CP electrocatalyst,*** increased catalytic performance is attributed to the high N_(2)adsorption and depressed HER.

关键词： nitrogen reduction reaction MoS_(2)electrocatalyst hydrophobic modification density functional theory calculations

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