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Preparation of magnetically separable mesoporous activated carbons from brown coal with Fe3O4

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International Journal of Mining Science and Technology 2019年第3期29卷 513-519页

作者： yong Jiang Qiang Xie Yanhai Zhang Cuiyu geng Bin Yu Juan Chi Poten Environmental Group Co.Ltd. Beijing 100083China School of Chemistry and Environmental Engineering China University of Mining and Technology (Bejing)Bejing 100083China

Magnetically separable mesoporous activated carbon was prepared from brown coal in the presence of Fe3O4 as a bi-functional *** activated carbon(MAC)was characterized by lowtemperature nitrogen adsorption,scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS)and vibrating sample magnetometry(VSM).The evolution behaviors and transition mechanism of Fe3O4 during the preparation of MAC were *** results show that prepared MAC with 6 wt%Fe3O4 addition having a specific surface area and mesopore ratio of 370 m^2·g^-1 and 55.7%,which meet the requirements of adsorption application and magnetic *** dispersed iron-containing aggregates with the size of 0.1 lm in the MAC were *** the preparation of MAC,Fe3O4 could enhance the escape of volatiles during the ***3O4 could also accelerate burning off the carbon wall during activation,which leads to enlarging micropore size,then resulting in the generation of mesopore and *** a result,a part of Fe3O4 converted into FeO,FeOOH,a-Fe,c-Fe,Fe2SiO4 and compound of *** prepared activated carbon,which was magnetized by both of residual Fe3O4,reduced a-Fe and c-Fe,can be easily separated from the original solution by external magnetic field.

关键词： Magnetic activated carbon Preparation Brown coal Ferroferric oxide Magnetic separation

PREPARATION OF SINGLE-HOLE HOLLOW POLYMER NANOSPHERES BY RASPBERRY-LIKE TEMPLATE METHOD

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Chinese Journal of Polymer Science 2013年第2期31卷 294-301页

作者： yong Zhang Jia-jia Chen geng-hui Zhang Bai-zhu Chen 阎虎生 Key laboratory of Functional Polymer Materials (Ministry of Education) Institute of Polymer Chemistry Nankai University

Single-hole hollow polymer nanospheres were fabricated by raspberry-like template method using ＂graft-from＂ strategy through atom transfer radical polymerization （ATRP）. Nanometer-sized silica spheres were covalently attached onto the surfaces of micrometer-sized silica spheres. Crosslinked polymer shells on the nano-sized spheres outside the attached area were formed by ＂graft-from＂ strategy through ATRP. After removal of the silica cores, single-hole hollow crosslinked polymer nanospheres were obtained. In this strategy, most of ATRP monomers may be used and thus many functional groups can be easily incorporated into the single-hole hollow crosslinked polymer nanospheres.

关键词： Single-hole Hollow polymeric nanoparticles ATRP.

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住房产权归属何以影响城市家庭教育投资

山西财经大学学报 2025年第1期47卷 60-71页

作者：陈荣赓李天峰复旦大学国际关系与公共事务学院中南大学人文学院

基于家庭内部议价能力与社会规范两种解释，探究夫妻间住房产权归属与家庭教育投资的关系。利用CFPS数据实证发现，通过女性劳动参与和家庭收入两种机制，女性拥有住房产权促进了家庭教育投资绝对数额增加。异质性分析显示，伴随女性受... 详细信息

基于家庭内部议价能力与社会规范两种解释，探究夫妻间住房产权归属与家庭教育投资的关系。利用CFPS数据实证发现，通过女性劳动参与和家庭收入两种机制，女性拥有住房产权促进了家庭教育投资绝对数额增加。异质性分析显示，伴随女性受教育水平提升与受教育水平性别差距缩小，住房产权对家庭教育投资的影响得以增强，另外二者间影响仅在男孩子代与独生子女样本中表现明显。进一步分析显示，相较于女性独有产权，夫妻共享住房产权对家庭教育投资的影响更大。

关键词：住房产权性别差异家庭教育投资家庭内部议价能力社会规范劳动参与家庭收入夫妻财产约定

Metastable seed-crystals: epitaxial growth of branched-array organic heterostructure nanowires

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Science China Chemistry 2025年

作者： Jin Feng Zhen-Yu geng Ting-Yao Song Ying-Xin Ma Chuan-Zeng Wang Wei Zhang Hong-Tao Lin Jin Zhou Shu-Ping Zhuo Shu-Hai Chen Xue-Dong Wang School of Chemistry and Chemical Engineering Shandong University of Technology Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & DevicesSoochow University College of Chemistry and Chemical Engineering Hunan Normal University

Tunable light–matter interactions are exhibited by organic low-dimensional crystals, making these crystals a promising platform for organic photonics. However, the precise synthesis of organic low-dimensional crystals remains challenging due to the stochastic nature of molecular nucleation processes. Herein, the directed nucleation process is driven by the introduction of metastable seed-crystals as the trunk, which ultimately leads to branched-array organic heterostructures. The successful formation of organic heterostructures with high-density branched arrays is attributed to the highest attachment energy (Eatt（023）=-104.25 kcal mol-1) of the exposed （023） crystal plane during the seed-crystal growth route. Significantly, these as-prepared heterostructures inherently have an ultralow lattice mismatch ratio η of 0.7%between trunk and branch, which contributes to the multi-channel photon transportation. Therefore, this work provides valuable insights into a versatile synthetic strategy for accessing low-dimensional heterostructures for integrated optoelectronics.

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Sciatic nerve repair using adhesive bonding and a modified conduit

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Neural Regeneration Research 2014年第6期9卷 594-601页

作者： Xiangdang Liang Hongfei cai yongyu Hao geng Sun Yaoyao Song Wen Chen Department of Orthopedics General Hospital of Chinese PLA Wei Zikeng Clinic of General Armament Department of Chinese PLA Department of Orthopedics 252 Hospital of Chinese PLA

When repairing nerves with adhesives, most researchers place glue directly on the nerve stumps, but this method does not fix the nerve ends well and allows glue to easily invade the nerve ends. In this study, we established a rat model of completely transected sciatic nerve injury and re- paired it using a modified 1 cm-length conduit with inner diameter of 1.5 mm. Each end of the cylindrical conduit contains a short linear channel, while the enclosed central tube protects the nerve ends well Nerves were repaired with 2-octyl-cyanoacrylate and suture, which complement the function of the modified conduit. The results demonstrated that for the same conduit, the av- erage operation time using the adhesive method was much shorter than with the suture method. No significant differences were found between the two groups in sciatic function index, motor evoked potential latency, motor evoked potential amplitude, muscular recovery rate, number of medullated nerve fibers, axon diameter, or medullary sheath thickness. Thus, the adhesive method for repairing nerves using a modified conduit is feasible and effective, and reduces the operation time while providing an equivalent repair effect.

关键词： nerve regeneration nerve repair adhesive anastomosis cyanoacrylate nerve conduits sciatic nerve electrophysiology muscle recovery the International Technology Cooperation Program neural regeneration

Imidacloprid-induced transference effect on some elements in rice plants and the brown planthopper Nilaparvata lugens （Hemiptera： Delphacidae）

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Insect Science 2011年第3期18卷 289-297页

作者： Samer Azzam Fan Yang Jin-cai Wu Jin geng Guo-Qing Yang School of Plant Protection Yangzhou University Yangzhou Jiangsu Province China

The widespread use ofimidacloprid against insect pests has not only increased the rate of the development of target pest resistance but has also resulted in various negative effects on rice plants and Nilaparvata lugens resurgence. However, the effect of imidacloprid on elements in rice plants and the transference of these element changes between rice and N. lugens are currently poorly understood. The present study investigated changes ofCu, Fe, Mn, Zn, Ca, K, Mg and Na contents in rice plants following imidacloprid foliar sprays in the adult female ofN./ugens that develops from nymphs that feed on treated plants and honeydew produced by females. The results indicated that imidacloprid foliar spray significantly increased Fe and K contents in leaf sheaths. Generally, Fe, Mn, K and Na contents in leaf blades were noticeably decreased, but Ca contents in leaf blades for ! 0 and 30 mg/kg imidacloprid treatments were significantly increased. The contents of most elements except K and Mg in the adult females and honeydew were significantly elevated. Multivariate statistical analysis showed that Fe, Mn and Na in leaf blades and Fe and Mn in leaf sheaths could be proportionally transferred to N. lugens. The relationship between most elements in adult female bodies and in the honeydew showed a positive correlation coefficient. There were significant differences in the contents of some elements in rice plants and N. lugens from different regions.

关键词： elements imidacloprid Nilaparvata lugens rice plant transference effect

Topographic controls on the annual runoff coefficient and implications for landscape evolution across semiarid Qilian Mountains, NE Tibetan Plateau

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Journal of Mountain Science 2020年第2期17卷 464-479页

作者： cai Shun geng Hao-peng PAN Bao-tian HONG Yang CHEN Li-ping Key Laboratory of Western China’s Environmental Systems (Ministry of Education) College of Earth and Environmental Sciences Lanzhou University

The combination of different topographic and climatic conditions results in varied precipitation-runoff relations, which in turn influences hillslope erosion, sediment transport and bedrock incision across mountainous landscapes. The runoff coefficient is a suitable tool to represent precipitation-runoff relations, but the spatial distribution of the runoff coefficient across tectonically active mountains in semi-arid environments has received little attention because of limited data availability. We calculated annual runoff coefficients over 22 years for 26 drainage basins across the semi-arid Qilian Mountains based on:(i) annual discharge records;and(ii) the China Meteorological Forcing Dataset to enhance our understanding of the precipitation-runoff processes. The mean annual runoff coefficients show no obvious spatial trends. When compared to potential controlling factors, mean annual runoff coefficients are highly correlated with mean slope rather than any climatic characteristics(e.g., mean annualprecipitation and Normalized Difference Vegetation Index). The slope-dependent runoff coefficient could theoretically have enhanced the topographic control on erosion rates and dampen the influence of precipitation. The enhanced discharge for drainage basins with less precipitation but steep topography in the western Qilian Mountains will enable fluvial incision to keep pace with ongoing uplift caused by the northward growth of the Qilian Mountains. The geomorphic implications are that tectonic rather than climatic factors are more significant for long-term landscape evolution in arid and semi-arid contexts.

关键词： Landscape evolution Precipitation-runoff process Qilian mountains Semiarid environments

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浅谈综合治理工程中土工膜施工工艺

科学技术创新 2025年第1期 186-189页

作者：陈庚甘肃省水利水电工程局有限责任公司甘肃兰州

土工膜能够有效的解决渗漏问题,防渗效果良好,施工工艺简单高效、成本低廉,近几年土工膜施工工艺在水利工程中被广泛应用,并取得了显著的成效。本文对土工膜施工工艺流程、施工方法、焊接技术及其土工膜与建筑物粘接施工等进行了介绍,... 详细信息

土工膜能够有效的解决渗漏问题,防渗效果良好,施工工艺简单高效、成本低廉,近几年土工膜施工工艺在水利工程中被广泛应用,并取得了显著的成效。本文对土工膜施工工艺流程、施工方法、焊接技术及其土工膜与建筑物粘接施工等进行了介绍,为类似工程提供参考并积累经验。

关键词：土工膜施工方法焊接技术焊缝检测

Responding to the Paris Climate Agreement： global climate change mitigation efforts

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Frontiers in Energy 2018年第3期12卷 333-337页

作者： yong geng Tsuyoshi FUJITA Anthony CHIU Hancheng DAI Han HAO School of Environmental Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China China Institute for UrbanGovernance Shanghai Jiao Tong University Shanghai 200030 China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092 China National Institute for Environmental Studies Tsukuba Ibaraki 305-8506 Japan Gokongwei College of Engineering De La Salle University Manila1004 the Philippines College of Environmental Sciences and Engineering Peking UniversityBeijing 100871 China State Key Laboratory of Automotive Safety and Energy Tsinghua University Beijing 100084 China

Since the Paris Climate Agreement was adopted by consensus in December 2015, the global society has made various efforts to respond to this Agreement. The essential element of the Paris Climate Agreement is the so-called Nationally Determined Contributions （NDCs）, specifying the long-term greenhouse gas （GHG） reduc- tion targets beyond 2020. Unlike the different legal obligations of developed and developing countries specified in the precedent Kyoto Protocol, the NDCs under the Paris Climate Agreement apply equally to all countries. All the signed countries were asked to submit their Intended Nationally Determined Contributions （INDCs） before the 2015 Paris Climate Summit, which serve, unless otherwise provided, as the initial NDCs after the ratification of the Agreement.

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