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| 1 | Fast neutron radiation inactivation of Bacillus subtilis:Absorbed dose determination显示文摘In this paper,fast neutron inactivation effects of Bacillus subtilis were investigated with fission fast neutrons from CFBR-Ⅱreactor of INPC(Institute of Nuclear Physics and Chemistry)and mono-energetic neutrons from the Van de Graaff accelerator at Peking University.The method for determining the absorbed dose in the Bacillus subtilis suspension contained in test tubes is introduced.The absorbed dose,on account of its dependence on the volume and the form of confined state,was determined by combined experiments and Monte Carlo method.Using the calculation results of absorbed dose,the fast neutron inactivation effects on Bacillus subtilis were studied.The survival rates and absorbed dose curve was constructed. | SONG Lingli ZHENG Chun AI Zihui LI Junjie DAI Shaofeng | 2011 | Nuclear Science and Techniques2011，22，3： | 3 |
| 2 | Exome sequencing reveals genetic architecture in patients with isolated or syndromic short stature显示文摘Short stature is among the most common endocrinological disease phenotypes of childhood and may occur as an isolated finding or in conjunction with other clinical manifestations.Although the diagnostic utility of clinical genetic testing in short stature has been implicated,the genetic architecture and the utility of genomic studies such as exome sequencing(ES)in a sizable cohort of patients with short stature have not been investigated systematically.In this study,we recruited 561 individuals with short stature from two centers in China during a 4-year period.We performed ES for all patients and available parents.All patients were retrospectively divided into two groups:an isolated short stature group(group I,n=257)and an apparently syndromic short stature group(group II,n=304).Causal variants were identified in 135 of 561(24.1%)patients.In group I,29 of 257(11.3%)of the patients were solved by variants in 24 genes.In group II,106 of 304(34.9%)patients were solved by variants in 57 genes.Genes involved in fundamental cellularprocess played an important role in the genetic architecture of syndromic short stature.Distinct genetic architectures and pathophysiological processes underlie isolated and syndromic short stature. | Xin Fan Sen Zhao Chenxi Yu Di Wu Zihui Yan Lijun Fan Yanning Song Yi Wang Chuan Li Yue Ming Baoheng Gui Yuchen Niu Xiaoxin Li Xinzhuang Yang Shiyu Luo Qiang Zhang Xiuli Zhao Hui Pan Mei Li Weibo Xia Guixing Qiu Pengfei Liu Shuyang Zhang Jianguo Zhang Zhihong Wu James R.Lupski Jennifer E.Posey Shaoke Chen Chunxiu Gong Nan Wu | 2021 | Journal of Genetics and Genomics2021，48，5： | 2 |
| 3 | Replacing“Alkyl”with“Aryl”for inducing accessible channels to closed pores as plateau-dominated sodium-ion battery anode显示文摘Hard carbons are promising anodes for sodium-ion batteries.However,there is still considerable controversy regarding the sodium storage behaviors in hard carbons,which are mainly attributed to the varied precursors,confused pyrolysis mechanism,and different characterization methods.Herein,benefiting from the flexible molecular structure of polymers,a series of hard carbons with carefully tunedmicrostructures are fabricated by adjusting the ratio of aryl and alkyl groups in the epoxy resins.The results of dynamic mechanical analysis,insitu Fourier transform infrared spectra,and synchronous thermal gravimetricinfrared spectrum-gas chromatography/mass spectrometry reveal that replacing the alkyl with aryl groups in the resin can enhance the crosslink density,inhibit the degradation and rearrangement process,and further lead to a more disordered microstructure.In addition,it is suggested that accessible channels provided by sufficiently wide interlayer spacing are necessary for closed pore filling.The optimized anode delivers a high capacity of 375 mAh/g in half cell with an initial Coulombic efficiency of 80.61%,and an energy density of 252 Wh/kg is attained in full cell.Finally,a reliable relationship among precursor-pyrolysis mechanism-structure-performance is established,and the sodium storagemechanism of“adsorption-insertion-pore filling”iswell proved. | Wenlong Shao Qi Cao Siyang Liu Tianpeng Zhang Zihui Song Ce Song Zhihuan Weng Xigao Jian Fangyuan Hu | 2022 | SusMat2022，2，3： | 1 |
| 4 | A flexible design strategy to modify Ti3C2Tx MXene surface terminations via nucleophilic substitution for long-life Li-S batteries显示文摘MXene-based materials have gained considerable attention for lithium-sulfur(Li-S)batteries cathode materials due to their superior electric conductivity and high affinitive to polysulfides.However,there are still challenges in modifying the surface functional groups of MXene to further improve the electrochemical performance and increase the structure variety for MXene-based sulfur host.Herein,we report an efficient and flexible nucleophilic substitution(S_(N))strategy to modify the Ti_(3)C_(2)T_(x) surface terminations and purposefully designed Magnolol-modified Ti_(3)C_(2)T_(x)(M-Ti_(3)C_(2)T_(x))as powerful cathode host materials.Benefiting from more C-Ti-O bonds forming and diallyl groups terminations reducing after the dehalogenation and nucleophilic addition reactions,the given M-Ti_(3)C_(2)T_(x) electrode could effectively suppress the lithium polysulfides shuttling via chemisorption and C—S covalent bond formation.Besides,the Magnolol-modified Ti_(3)C_(2)T_(x) significantly accelerates polysulfide redox reaction and reduces the activation energy of Li_(2) S decomposition.As a result,the as-prepared M-Ti_(3)C_(2)T_(x) electrode displays an excellent rate capability and a high reversible capacity of 7.68 mAh cm^(-2)even under 7.2 mg cm^(-2)S-loaded with a low decay rate of 0.07%(from 2 nd cycle).This flexible surface-modified strategy for MXene terminations is expected to be extended to other diverse MXene applications. | Tianpeng Zhang Wenlong Shao Siyang Liu Zihui Song Runyue Mao Xin Jin Xigao Jian Fangyuan Hu | 2022 | Journal of Energy Chemistry2022，31，11： | 1 |
| 5 | MXenes for metal-ion and metal-sulfur batteries:Synthesis,properties,and electrochemistry显示文摘In 2011,a new class of 2D materials was discovered;after 2012,they began to be concerned;in 2017,the“gold rush”of the materials was triggered,and they are exactly MXenes.2D MXenes,a new class of transition metal carbides,carbonitrides and nitrides,have become the star and cutting-edge research materials in the field of emerging batteries systems due to their unique 2D structure,abundant surface chemistry,and excellent physical and electrochemical properties.This review focuses on the MXene materials and summarizes the recent advancements in the synthesis techniques and properties,in addition to a detailed discussion on the electrochemical energy storage applications,including alkali-ion(Li^(+),Na^(+),K^(+))storage,lithium-sulfur(Li–S)batteries,sodiumsulfur(Na–S)batteries,and metal anode protection.Special attentions are given to the elaborate design of nano-micro structures of MXenes for the various roles as electrodes,multifunctional components,S hosts,modified separators,and metal anode protective layers.The paper ends with a prospective summary of the promising research directions in terms of synthesis,structure,properties,analysis,and production on MXene materials. | Siyang Liu Zihui Song Xin Jin Runyue Mao Tianpeng Zhang Fangyuan Hu | 2022 | Materials Reports(Energy)2022，2，1： | 0 |
| 6 | Multicomponent polymerization of sulfur, chloroform and diamine toward polythiourea显示文摘The efficient utilization of elemental sulfur(S8) for developing high value-added chemicals is a global concern considering its abundant sources and yearly accelerating environmental issues. However, it has been a long-standing challenge to directly transform elemental sulfur to sulfur-containing polymer, especially via an environmentally benign manner. Herein, a unique chemo-differentiating multicomponent polymerization(MCP) of elemental sulfur, chloroform, and diamine is reported to construct polythiourea based on amine-involved two sequential reactions including isothiocyanation and nucleophilic addition.This strategy features isocynide-free monomers as starting materials, mild conditions, high molecular weights(up to72,900 g/mol) and desired yields(up to 83%). With the advantages of inactive isocyanation and active nucleophilic addition, the stoichiometric balance of amine and isothiocyanate could be delicately controlled to afford various polythioureas with high molecular weights. The polythioureas have been further utilized in the Cu-based aqueous catalysis and Hg-based ion adsorption. | Nan Zheng He Gao Zihui Jiang Wangze Song | 2023 | Science China Chemistry2023，66，3： | 0 |
| 7 | Sulfur polymerization strategy based on the intrinsic properties of polymers for advanced binder-free and high-sulfur-content Li–S batteries显示文摘Lithium-sulfur(Li-S)batteries are the promising next-generation secondary energy storage systems,because of their advantages of high energy density and environmental friendliness.Among numerous cathode materials,organosulfur polymer materials have received extensive attentions because of their controllable structure and uniform sulfur distribution.However,the sulfur content of most organosulfur polymer cathodes is limited(S content<60%)due to the addition of large amounts of conductive agents and binders,which adversely affects the energy density of Li-S batteries.Herein,a hyperbranched sulfur-rich polymer based on modified polyethyleneimine(Ath-PEI)named carbon nanotubeentangled poly(allyl-terminated hyperbranched ethyleneimine-random-sulfur)(CNT/Ath-PEI@S)was prepared by sulfur polymerization and used as a Li-S battery cathode.The high intrinsic viscosity of Ath-PEI provided considerable adhesion and avoided the addition of PVDF binder,thereby increasing the sulfur content of cathodes to 75%.Moreover,considering the uniform distribution of elemental sulfur by the polymer,the utilization of sulfur was successfully improved,thus improving the rate capability and discharge capacity of the battery.The binder-free,sulfur-rich polymer cathode exhibited ultra-high initial discharge capacity(1520.7 mAh g^(−1) at 0.1 C),and high rate capability(804 mAh g^(−1) at 2.0 C).And cell-level calculations show that the electrode exhibits an initial capacity of 942.3 mAh g^(−1) electrode,which is much higher than those of conventional sulfur-polymer electrodes reported in the literature. | Zihui Song Tianpeng Zhang Siyang Liu Wenlong Shao Wanyuan Jiang Runyue Mao Xigao Jian Fangyuan Hu | 2023 | SusMat2023，3，1： | 0 |
| 8 | A semi-immobilized sulfur-rich copolymer backbone with conciliatory polymer skeleton and conductive substrates for high-performance Li-S batteries显示文摘Sulfur-rich polymers have gained a great deal of attention as the next-generation active materials in lithium-sulfur(Li-S)batteries due to their low cost,environmental compatibility,naturally sulfur uniform dispersion,and distinctive structure covalently bonding with sulfur atoms.However,the poor electrical conductivity and undesirable additional shuttle effect still hinder the commercial application of sulfur-rich polymers.Herein,we report a flexible semi-immobilization strategy to prepare allylterminated hyperbranched poly(ethyleneimine)-functionalized reduced graphene oxide(A-PEI-EGO)as sulfur-rich copolymer backbone.The semi-immobilization strategy can effectively reconcile the demand for polymer skeleton and conductive substrates through forming quaternary ammonium groups and reducing oxygen-containing functional groups,resulting in enhanced skeleton adsorption capacity and substrate electronic conductivity,respectively.Furthermore,the stable covalent bonding connection based on polymer molecules(A-PEI)not only completely prevents the additional shuttle effect of lithiation organic molecules and even sulfur-rich oligomers,but provides more inverse vulcanization active sites.As a result,the as-prepared A-PEI-EGO-S cathodes display an initial discharge capacity of1338 m A h g^(-1)at a rate of 0.1 C and an outstanding cycling stability of 0.046%capacity decay per cycle over 600 cycles.Even under 6.2 mg cm^(-2)S-loaded and sparing electrolyte of 6μL mg^(-1),the A-PEI-EGO-S cathode can also achieve a superior cycling performance of 98%capacity retention after 60 cycles,confirming its application potential. | Tianpeng Zhang Zihui Song Jinfeng Zhang Wanyuan Jiang Runyue Mao Borui Li Siyang Liu Xigao Jian Fangyuan Hu | 2023 | Journal of Energy Chemistry2023，，6： | 0 |
| 9 | Highly Active Electrocatalyst Derived from ZIF-8 Decorated with Iron(III) and Cobalt(III) Porphyrin Toward Efficient Oxygen Reduction in Both Alkaline and Acidic Media显示文摘Zeolite imidazole frameworks 8(ZIF-8)and modified ones after pyrolysis are highly promising toward oxygen reduction reaction(ORR).Especially,the compositional modification of ZIF-8 is crucial to the enhancement of ORR performance,yet limited to the substitution of skeletal Zn(II)with other cations or simple physical adsorption of cations.Herein,we report the decoration of ZIF-8 with ORR active hemin(FeP)and Co(III)protoporphyrin(CoP)via the coordination between the peripheral carboxylic group of FeP and CoP with skeletal Zn(II).This allows well control over the quantity of loaded FeP and CoP,critical to the synthesis of advanced electrocatalysts.Subsequent pyrolysis of FeP and CoP co-decorated ZIF-8 leads to highly active ORR electrocatalysts with a half-wave potential(E1/2)of 0.913 V(vs.RHE)in 0.1 mol/L KOH aq.and an E1/2 of 0.803 V(vs.RHE)in 0.1 mol/L HClO4 aq.Moreover,our electrocatalyst shows much more improved and comparable durability in alkaline and acidic media,respectively,during 3000 cycles of cyclic voltammetry(CV)scanning relative to commercial Pt/C. | ZHENG Ruonan ZHAI Zihui QIU Chenxi GAO Rui LV Yang SONG Yujiang | 2022 | Chemical Research in Chinese Universities2022，38，4： | 0 |
| 10 | Genome-wide antagonism between 5-hydroxymethylcytosine and DNA methylation in the adult mouse brain显示文摘为 DNA 修正装证据点到关键角色,包括 5-methylcytosine (5mC ) 和它的氧化形式,在哺乳动物的神经系统的发展,粘性和混乱。新奇 DNA 基础 5- hydroxymethylcytosine (5hmC ) 被知道能够开始被动或活跃的 DNA demethylation,但是 5hmC 是否并且怎么广泛地在塑造 mitotic 以后 neuronal DNA methylome 工作是不清楚的。这里,我们在 vivo 从成年老鼠马头鱼尾的怪兽在有牙齿的小粒神经原报导 5hmC 的染色体宽的分发。在 neuronal 染色体的 5hmC 高度在基因身体被充实,特别在 exons,并且与基因表示相关。在胚胎的干细胞和神经原之间的 5hmC 分发的直接染色体宽的比较揭示广泛的差别,反映在这二种房间类型之间的功能的不同。重要地, 5hmC,全面 DNA methylation 和在 vivo 的有牙齿的小粒神经原的基因表示侧面的综合分析揭示在 cytosine 修正的这二个状态之间的染色体宽的对抗,支持为在塑造由支持活跃 DNA demethylation 的 neuronal DNA methylome 的 5hmC 的一个角色。 | Junjie U. GUO Keith E. SZULWACH Yijing SU Yujing LI Bing YAO Zihui XU Joo Heon SH1N Bing XIE Yuan GAO Guo-li MING Peng JIN Hongjun SONG | 2014 | Frontiers in Biology2014，9，1： | 0 |
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