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Pt-Sn clusters anchored at Al_(penta)^(3+) sites as a sinter-resistant and regenerable catalyst for propane dehydrogenation

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Journal of Energy Chemistry 2022年第2期31卷 293-301页

作者： xinyue zhu Tinghai Wang Zhikang Xu Yuanyuan Yue Minggui Lin Haibo zhu National Engineering Research Center of Chemical Fertilizer Catalyst School of Chemical EngineeringFuzhou UniversityFuzhou 350002FujianChina State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001ShanxiChina

Pt-based catalysts are widely used in propane dehydrogenation reaction for the production of *** irreversible deactivation caused by the sintering of Pt particles under harsh conditions and regeneration process is a significant challenge in this ***,a series of highly ordered mesoporous Al_(2)O_(3) supports with different levels of Al3+penta sites,are fabricated and used as the support to disperse Pt-Sn_(2) *** of Pt-Sn_(2)/meso-Al_(2)O_(3) with XRD,NMR,CO-IR,STEM,TG,and Raman techniques along with propane dehydrogenation-regeneration cycles test reveal the structure-stability-re generability *** coordinatively unsaturated pentacoordinate Al_(Al3+penta)^(3+)can strongly anchor Pt atoms via a formation of Al-O-Pt bond,and thus stabilize the Pt-based particles at the surface of Al_(2)O_(3).The stability and regenerability of Pt-Sn2/meso-Al_(2)O_(3) are strongly dependent on the content of Al3+penta sites in the Al_(2)O_(3) structure,and a high level of Al3+penta sites can effectively prevent the agglomeration of Pt-Sn2 clusters into large Pt nanoparticles in the consecutive dehydrogenation-regeneration *** Pt-Sn2/meso-Al_(2)O_(3)-600 with the highest level of Al_(penta)^(3+) (50.8%)delivers the best performance in propane dehydrogenation,which exhibits propane conversion of 40%and propylene selectivity above 98%at 570℃ with 10 vol%C_(3)H_(8) and 10 vol% H_(2) feed.A slow deactivation in this catalyst is ascribed to the formation of coke,and the catalytic performance can be fully restored in the consecutive dehydrogenation-regeneration cycles via a simple calcination treatment.

关键词： Propane dehydrogenation Pt catalyst Regeneration Sinter-resistance

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柔性条式疏花执行装置试验研究

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农机化研究 2025年第2期47卷 122-130页

作者：冯生张秀花孔德刚陈磊朱欣悦魏华杰河北农业大学机电工程学院河北保定071000 石家庄装备制造学校石家庄050899

疏花可以调整果树负载量,是影响果树产量和质量的重要因素。为研究机械疏花效果及其影响因素,采用自主研发的柔性条式疏花机执行装置对桃花进行试验,选取橡胶和尼龙两种材料的疏花条,以疏花条轴向间距、疏花条列数、主轴转速、工作模式... 详细信息

疏花可以调整果树负载量,是影响果树产量和质量的重要因素。为研究机械疏花效果及其影响因素,采用自主研发的柔性条式疏花机执行装置对桃花进行试验,选取橡胶和尼龙两种材料的疏花条,以疏花条轴向间距、疏花条列数、主轴转速、工作模式为试验因素,以疏花指数来评价疏花效果,并优化了装置的工作参数。结果表明:若采用尼龙疏花,疏花轴转速为400 r/min、疏花条列数为4、工作模式为冠内垂直、疏花条轴向间距为5 cm时效果最优;若采用胶条疏花,疏花轴转速为450 r/min、疏花条列数为4、工作模式为冠外平行、疏花条轴向间距为4 cm时效果最优。经试验验证,设计满足疏花的工作要求,为柔性条式疏花机的研发提供了理论依据。

关键词：桃树疏花疏花机柔性条式参数优化正交试验

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Highly selective NIR fluorescent probe for acetylcholinesterase and its application in pesticide residues detection

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Chinese Chemical Letters 2022年第9期33卷 4233-4237页

作者： Shengui He Shufang Zhang Xin Zhao xinyue zhu Lisen Chen Jingnan Cui State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian 116024China

A series of near-infrared(NIR)fluorescent substrates(NDRO-1∼8)derived from fluorophore NDRH with different volumes of ester bond as the recognition group were designed and synthesized for the detection of acetylcholinesterase(AChE),among which NDRO-1 with the smallest acetate group displayed the highest activity toward *** detection limit of NDRO-1 for sensing AChE was 0.32μg/mL,and K_(m )was 6.40μmol/L,indicating ultra-sensitivity and good affinity of NDRO-1 toward ***-1 was used to detect the inhibitory of four kinds of pesticides including methamidophos,dichlorvos,and the detection limit was lower than 50μg/L,which was further used in pesticide residues detection.

关键词： NIR fluorescent probe Acetylcholinesterase Enzyme-activated Pesticide residue detection

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Mo_(3)(C_(6)X_(6))_(2)(X=NH,S,O)monolayers:two-dimensional conductive metal-organic frameworks as effective electrocatalysts for the nitrogen reduction reaction

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Journal of Energy Chemistry 2021年第10期30卷 71-76,I0003页

作者： Juan Zhang xinyue zhu Weixiang Geng Tianchun Li Manman Li Chubo Fang Xiaocao Shan Yafei Li Yu Jing Jiangsu Co-Innovation Centre of Efficient Processing and Utilization of Forest Resources College of Chemical EngineeringNanjing Forestry UniversityNanjing 210037JiangsuChina Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Centre of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023JiangsuChina

As a constituent element of amino acids,nitrogen plays an important role in nourishing plants,animals and other forms of *** the atmosphere is rich in nitrogen gas(N_(2)),the highly inert N≡N bond makes it difficult for most organisms to directly utilize N_(2).The supply of nitrogen in the biological chain mainly depends on the slow conversion of N_(2) to ammonia(NH3)by biological nitrogen fixation[1].

关键词： Nitrogen reduction reaction Electrocatalysis Two-dimensional metal–organic frameworks First principles calculations

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Exercise attenuates angiotensinⅡ-induced muscle atrophy by targeting PPARγ/miR-29b

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Journal of Sport and Health Science 2022年第6期11卷 696-707,F0003页

作者： Qi Liu Liyang Chen Xuchun Liang Yuqing Cao xinyue zhu Siqi Wang Jin Li Juan Gao Junjie Xiao Cardiac Regeneration and Ageing Lab Institute of Cardiovascular SciencesSchool of Life ScienceShanghai UniversityShanghai 200444China Shanghai Engineering Research Center of Organ Repair School of MedicineShanghai UniversityShanghai 200444China

Background:Exercise is beneficial for muscle *** proliferator-activated receptor gamma(PPARγ) and microRNA-29 b(miR-29 b) have been reported to be responsible for angiotensinⅡ(AngⅡ)-induced muscle ***,it is unclear whether exercise can protect AngⅡ-induced muscle atrophy by targeting PPARγ/miR-29 ***:Skeletal muscle atrophy in both the control group and the run group was established by AngⅡ infusion;after 1 week of exercise training,the mice were sacrificed,and muscle weight was *** size was measured by hematoxylin-eosin and wheat-germ agglutinin *** was evaluated by terminal deoxynucleotidyl transferase dUTP nick end labeling *** expression level of muscle atrogenes,including F-box only protein 32(FBXO32,also called Atrogin-1) and muscle-specific RING-finger 1(MuRF-1),the phosphorylation level of protein kinase B(PKB,also called AKT)/forkhead box 03 A(FOX03 A)/mammalian target of rapamycin(mTOR) pathway proteins,the expression level of PPARγ and apoptosis-related proteins,including B-cell lymphoma-2(Bcl-2),Bcl-2-associated X(Bax),cysteine-aspartic acid protease 3(caspase-3),and cleaved-caspase-3,were determined by western *** expression level of miR-29 b was checked by reversetranscription quantitative polymerase chain reaction.A PPARγ inhibitor(T0070907) or adeno-associated virus serotype-8(AAV8)-mediated miR-29 b overexpression was used to demonstrate whether PPARγ activation or miR-29 b inhibition mediates the beneficial effects of exercise in AngⅡ-induced muscle ***:Exercise can significantly attenuate AngⅡ-induced muscle atrophy,which is demonstrated by increased skeletal muscle weight,cross-sectional area of myofiber,and activation of AKT/mTOR signaling and by decreased atrogenes expressions and *** AngⅡ-induced muscle atrophy mice models,PPARγ was elevated whereas miR-29 b was decreased by *** protective effects of exercise in AngⅡ-induced muscle atrop

关键词： AngiotensinⅡ Exercise Muscle atrophy PPARg miR-29b

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The Profound Changes Unseen in a Century: The Perspective of Overlapping Effect of Technological Revolution Cycle and Political & Economic Thought Cycle

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Innovation and Development Policy 2019年第2期 119-131页

作者： Zhijian Hu Mingxi Zhang xinyue zhu Chinese Academy of Science and Technology for Development Beijing 100038 China

The waves of technological revolution can lead to great differences in the economic and social structures of countries and have a destructive impact. The choice of political and economic thoughts can amplify or inhibit such differentiation and impact. Over the past 100 years, humankind has undergone three technological revolutions, and the mainstream political and economic thoughts have experienced a cycle from classical liberalism to various types of anti-liberalism and finally to neoliberalism. In the two liberal periods, the overlap of liberalism and a technological revolution caused sharp contradictions between the rich and the poor, leading to profound economic adjustment and great political and social turmoil worldwide. In the non-liberal period, however, the overlapping effects were relatively mild. Currently, the world is facing similar trends and risks as during 1914-1940. Whether humankind will repeat the same mistakes merits attention and vigilance. This study argues that it is necessary to oppose unilateralism, uphold multilateralism, and advance globalization and free trade under the concept of collaborative development and shared prosperity, as well as explore comprehensive and sustainable development. These are of great significance for human society to prevent risks, obtain advantages and avoid disadvantages, and maintain world peace and development.

关键词： profound changes unseen in a century technological revolution political and economic thoughts polarization between the rich and the poor risk response

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A novel demodulation method for transmission using nitrogen–vacancy-based solid-state quantum sensor

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Chinese Physics B 2022年第7期31卷 56-59页

作者： Ruixin Bai xinyue zhu Fan Yang Tianran Gao Ziran Wang Linyan Yu Jinfeng Wang Li Zhou Guanxiang Du College of Telecommunication&Information Engineering Nanjing University of Posts and TelecommunicationsNanjing 210000China College of Electronic and Optical Engineering Nanjing University of Posts and TelecommunicationsNanjing 210000China College of Automation&College of Artificial Intelligence Nanjing University of Posts and TelecommunicationsNanjing 210000China

Diamond based quantum sensing is a fast-emerging field with both scientific and technological *** nitrogen–vacancy(NV)center,a crystal defect in diamond,has become a unique object for microwave sensing applications due to its excellent stability,long spin coherence time,and optical properties at ambient *** this work,we use diamond NV center as atomic receiver to demodulate on–off keying(OOK)signal transmitted in broad frequency range(2 GHz–14 GHz in a portable benchtop setup).We proposed a unique algorithm of voltage discrimination and demonstrated audio signal transceiving with fidelity above 99%.This diamond receiver is attached to the end of a tapered fiber,having all optic nature,which will find important applications in data transmission tasks under extreme conditions such as strong electromagnetic interference,high temperatures,and high corrosion.

关键词： NV center demodulate OOK signal high-frequency range audio signal transceiving

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Fluoxetine Rescues Excessive Myelin Formation and Psychological Behaviors in a Murine PTSD Model

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Neuroscience Bulletin 2024年第8期40卷 1037-1052页

作者： Chenrui Yin Kefei Luo xinyue zhu Ronghang Zheng Yu Wang Guangdan Yu Xiaorui Wang Fei She Xiaoying Chen Tao Li Jingfei Chen Baduojie Bian Yixun Su Jianqin Niu Yuxin Wang Department of Histology and Embryology Third Military Medical UniversityChongqing 400038China Department of Respiratory Diseases Central Medical Branch of PLA General HospitalBeijing 100853China China Astronaut Research and Training Center Beijing 100094China Department of Emergency the Fourth Medical Center of the Chinese PLA General HospitalBeijing 100142China Army 953 Hospital Shigatse Branch of Xinqiao HospitalThird Military Medical University(Army Medical University)Shigatse 857000China Research Centre Seventh Affiliated Hospital of Sun Yat-sen UniversityShenzhen 518107China

Posttraumatic stress disorder(PTSD)is a complex mental disorder notable for traumatic experience *** current first-line treatments are linked with clinically important symptom reduction,a large proportion of patients retained to experience considerable residual symptoms,indicating pathogenic mechanism should be illustrated *** studies reported that newly formed myelin could shape neural circuit function and be implicated in fear memory ***,its role in PTSD remains to be *** this study,we adopted a restraint stress-induced PTSD mouse model and found that PTSD-related neuropsychiatric symptoms were accompanied by increased myelination in the posterior parietal cortex and ***,but not risperidone or sertraline,has a more profound rescue effect on neuropsychological behaviors and myelin *** mechanistic experiments revealed that fluoxetine could directly interfere with oligodendroglial differentiation by upregulating Wnt *** data demonstrated the correlation between PTSD and abnormal myelination,suggesting that the oligodendroglial lineage could be a target for PTSD treatment.

关键词： PTSD Fear memory Myelination Oligodendroglial differentiation Fluoxetine Wnt signaling

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Low-threshold continuous operation of fiber gas Raman laser based on large-core anti-resonant hollow-core fiber

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Chinese Optics Letters 2022年第7期20卷 18-23页

作者： xinyue zhu Fei Yu Dakun Wu Yan Feng Shufen Chen Yi Jiang Lili Hu School of Optics and Photonics Beijing Institute of TechnologyBeijing 100081China Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800China Hangzhou Institute for Advanced Study UCASHangzhou 310024China

Continuous operation of fiber gas Raman lasing at the 1135 nm wavelength is experimentally demonstrated with an output power exceeding 26 *** stimulated Raman scattering(Rot-SRS)is generated in the hydrogen gas filled 50 m homemade anti-resonant hollow-core fiber(AR-HCF).A single-frequency fiber laser at the 1064 nm wavelength is used as the pump source,and a minimum threshold of 31.5 W is measured where the core diameter of AR-HCF reaches37μ*** to 40.4%power conversion efficiency of forward Rot-SRS is achieved in the single-pass configuration,corresponding to a quantum efficiency of 43.1%.Over 1 W strong backward Rot-SRS is observed in the experiment,ultimately limiting the further increase of Rot-SRS generation in the forward direction.

关键词： anti-resonant hollow-core fiber fiber gas laser rotational stimulated Raman scattering

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基于POD降阶模型的正弦波翅片扁管管翅式换热器流动与传热特性分析

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化工学报 2022年第5期73卷 1986-1994页

作者：王烨朱欣悦孙振东兰州交通大学环境与市政工程学院甘肃兰州730070 铁道车辆热工教育部重点实验室甘肃兰州730070

为了提高正弦波翅片扁管管翅式换热器的数值设计效率,以FVM(finite volume method,有限体积法)的计算结果作为样本数据构建POD降阶模型,研究换热器空气侧的流动与传热特性。结果表明:单参数和双参数变化时POD降阶模型重构的温度场与FVM... 详细信息

为了提高正弦波翅片扁管管翅式换热器的数值设计效率,以FVM(finite volume method,有限体积法)的计算结果作为样本数据构建POD降阶模型,研究换热器空气侧的流动与传热特性。结果表明:单参数和双参数变化时POD降阶模型重构的温度场与FVM计算结果的偏差集中表现在正弦波翅片表面区域,且沿主流方向呈减小趋势,2种方法所得速度分布的差异主要集中在主流区域。随着变量参数个数的增多,POD降阶模型的计算精度及计算效率均有所降低。POD降阶模型重构的物理场与FVM结果间的平均相对偏差最大值为2.921%,平均计算速度比传统FVM计算速度最大提高了11752倍。

关键词：本征正交分解管翅式换热器正弦波有限体积法数值模拟

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