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| 1 | Quantifying the Cloud Water Resource:Methods Based on Observational Diagnosis and Cloud Model Simulation显示文摘Based on the concepts of cloud water resource(CWR)and related variables proposed in the first part of this study,this paper provides details of two methods to quantify the CWR.One is diagnostic quantification(CWR-DQ)based on satellite observations,precipitation products,and atmospheric reanalysis data;and the other is numerical quantification(CWR-NQ)based on a cloud resolving model developed at the Chinese Academy of Meteorological Sciences(CAMS).The two methods are applied to quantify the CWR in April and August 2017 over North China,and the results are evaluated against all available observations.Main results are as follows.(1)For the CWR-DQ approach,reference cloud profiles are firstly derived based on the Cloud Sat/CALIPSO joint satellite observations for 2007–2010.The NCEP/NCAR reanalysis data in 2000–2017 are then employed to produce three-dimensional cloud fields.The budget/balance equations of atmospheric water substance are lastly used,together with precipitation observations,to retrieve CWR and related variables.It is found that the distribution and vertical structure of clouds obtained by the diagnostic method are consistent with observations.(2)For the CWR-NQ approach,it assumes that the cloud resolving model is able to describe the cloud microphysical processes completely and precisely,from which four-dimensional distributions of atmospheric water vapor,hydrometeors,and wind fields can be obtained.The data are then employed to quantify the CWR and related terms/quantities.After one-month continuous integration,the mass of atmospheric water substance becomes conserved,and the tempospatial distributions of water vapor,hydrometeors/cloud water,and precipitation are consistent with observations.(3)Diagnostic values of the difference in the transition between hydrometeors and water vapor(Cvh-Chv)and the surface evaporation(Es)are well consistent with their numerical values.(4)Correlation and bias analyses show that the diagnostic CWR contributors are well correlated with observations,and match their numerical counterparts as well,indicating that the CWR-NQ and CWR-DQ methods are reasonable.(5)Underestimation of water vapor converted from hydrometeors(Chv)is a shortcoming of the CWR-DQ method,which may be rectified by numerical quantification results or by use of advanced observations on higher spatiotemporal resolutions. | Miao CAI Yuquan ZHOU Jianzhao LIU Chao TAN Yahui TANG Qianrong MA Qi LI Jietai MAO Zhijin HU | 2020 | Journal of Meteorological Research2020，34，6： | 4 |
| 2 | CPPU may induce gibberellin-independent parthenocarpy associated with PbRR9 in‘Dangshansu’pear显示文摘Parthenocarpy is a valuable trait in self-incompatible plants,such as pear.N-(2-chloro-4-pyridyl)-N’-phenylurea(CPPU),a synthetic cytokinin analog,can induce parthenocarpy in pear(Pyrus spp.),but the mechanism of induction is unclear.To investigate the role of gibberellin in CPPU-induced parthenocarpy in pear,CPPU supplemented with paclobutrazol(PAC)was sprayed onto‘Dangshansu’pear.We found that the fruit set rate of pear treated with CPPU supplemented with PAC was identical to that in a CPPU-alone treatment group.In regard to cell development,CPPU mainly promoted hypanthium cell division and expansion,and PAC application had no influence on CPPU-induced cell development.RNA sequencing revealed that gibberellin 20 oxidase and gibberellin 3 oxidase genes were not differentially expressed following CPPU treatment.According to the analysis of fruit phytohormone content,the CPPU treatments did not induce gibberellin biosynthesis.These results suggest that CPPU-induced parthenocarpy may be gibberellin independent in‘Dangshansu’pear.After CPPU treatment,the indole acetic acid(IAA)content in fruit was significantly increased,and the abscisic acid(ABA)content was significantly decreased.Similarly,RNA sequencing revealed that many genes involved in the auxin and ABA pathways were significantly differentially expressed in the CPPU treatment groups;among them,indole-3-pyruvate monooxygenase(YUCCA)was significantly upregulated and 9-cis-epoxycarotenoid dioxygenase(NCED)was significantly downregulated.IAA and ABA may thus play important roles in CPPU-induced parthenocarpy.PbTwo-component response regulator9(PbRR9),PbYUCCA4,and PbNCED6 were then selected to further elucidate the mechanism of CPPU-induced parthenocarpy.A yeast one-hybrid assay indicated that PbRR9 can combine with the PbYUCCA4 and PbNCED6 promoters.Dual luciferase assays revealed that PbRR9 can promote and repress the activities of the PbYUCCA4 and PbNCED6 promoters,respectively.After the transient expression of PbRR9 in fruits,PbYUCCA4 expression was significantly upregulated,and PbNCED6 expression was significantly downregulated.This study uncovered a CPPU-induced parthenocarpy mechanism that is different from that in tomato.CPPU may upregulate PbYUCCA4 and downregulate PbNCED6 by upregulating PbRR9,thereby increasing IAA content and decreasing ABA content to ultimately induce parthenocarpy in‘Dangshansu’pear.However,because only a single time point was used and because‘botanical’and‘accessory’fruits have different structures,this conclusion is still preliminary. | Liu Cong Ting Wu Hanting Liu Huibin Wang Haiqi Zhang Guangping Zhao Yao Wen Qianrong Shi Lingfei Xu Zhigang Wang | 2020 | Horticulture Research2020，7，1： | 4 |
| 3 | Three-Dimensional sp^(2) Carbon-Linked Covalent Organic Frameworks as a Drug Carrier Combined with Fluorescence Imaging显示文摘Three-dimensional(3D)covalent organic frameworks(COFs)are crystalline porous polymers with potential in numerous high-tech applications,but the linkages involved in their synthesis are still rather limited.Herein,we report novel 3D sp^(2) carbon-linked COFs fabricated by the formation reaction of C=C bonds and their application in fluorescence imaging.These new COFs,namely JUC-580 and JUC-581,show high stability and excellent light-emitting properties in solid state and dispersed in various solvents.Furthermore,we investigate the potential application of JUC-581 as a drug carrier combined with fluorescence imaging.These results indicate that 3D sp^(2) carbon-linked COFs are not only potential drug-loaded and sustained release materials but also promising cell fluorescent stains.This study thus expands the structural categories of 3D COFs based on different linkages,and promotes their prospective applications for biomedicine and fluorescent materials. | Li Liao Zerong Zhang Xinyu Guan Hui Li Yaozu Liu Minghao Zhang Bin Tang Valentin Valtchev Yushan Yan Shilun Qiu Xiangdong Yao Qianrong Fang | 2022 | Chinese Journal of Chemistry2022，40，17： | 1 |
| 4 | Ovalbumin-stabilized gold nanoclusters with ascorbic acid as reducing agent for detection of serum copper显示文摘Ovalbumin-stabilized gold nanoclusters(OVA@AuNCs) were prepared with ascorbic acid as a reducing agent. This strategy could realize the synthesis of water-soluble OVA@AuNCs within 20 min. The asprepared fluorescent probe showed a red fluorescence emission at 630 nm. Moreover, the properties of the OVA@AuNCs were characterized by transmission electron microscope, dynamic light scattering,ultraviolet-visible spectroscopy, fluorescent spectroscopy. Based on the surface electron density decrease-induced fluorescence quenching mechanism, the OVA@AuNCs provided high sensitivity and selectivity for sensing copper ions. A good linear relationship was obtained between the fluorescence intensity of OVA@AuNCs and the concentration of copper ions in the range of 5.0-100.0 μmol/L(R^2=0.999) with a detection limit of 640 nmol/L Furthermore, the rat serum copper contents were determined by using the OVA@AuNCs based assay, indicating great potential of fluorescent probes for application in biological and clinical analysis. | Yifan Chen Juan Qiao Qianrong Liu Li Qi | 2018 | Chinese Chemical Letters2018，29，3： | 1 |
| 5 | A Three-dimensional Covalent Organic Framework for CO_(2) Uptake and Dyes Adsorption显示文摘Environmental pollution is one of the most severe problems facing today,including water pollution and the greenhouse effect.Therefore,developing materials with high-efficiency dyes adsorption and CO_(2)uptake is significant.Covalent organic frameworks(COFs),as a burgeoning class of crystalline porous polymers,present a promising application potential in areas related to pollution regulation due to their exciting surface properties.Herein,we report a 3D COF with a high specific surface area(BET about 2072 m^(2)/g)by utilizing tetrahedral and rectangle building blocks connected through[4+4]imine condensation reactions to synthesize.The obtained COF not only can separate dyes from water effectively but also shows a remarkable CO_(2)uptake capacity.This research thus provides a promising material to remove dyes and adsorb CO_(2)in environmental remediation. | SONG Jialong WANG Zitao LIU Yaozu TUO Chao WANG Yujie FANG Qianrong QIU Shilun | 2022 | Chemical Research in Chinese Universities2022，38，3： | 1 |
| 6 | A Two-dimensional Covalent Organic Framework for Iodine Adsorption显示文摘Radioactive iodine is a notorious pollutant in gas radioactive nuclear waste due to its radiation hazard, volatility, chemical toxicity, and high mobility. Therefore, developing a material with high efficiency-specific iodine capture is significant. Covalent organic framework(COF) has attracted significant attention as a new crystalline porous organic material. Due to its large specific surface and high chemical stability, it is an excellent alternative to adsorbents. Herein, we report a chemically stable two-dimensional COF(termed JUC-609) with specific adsorption of iodine. Adsorption experiments show that JUC-609 has an excellent iodine adsorption capacity as high as 5.9 g/g under 353 K and normal pressure condition, and iodine adsorption after multiple cycles is still maintained. Our study thus promotes the potential application of COFs in the field of environment-related applications. | ZHANG Jianhui LIU Jianchuan LIU Yaozu WANG Yujie FANG Qianrong QIU Shilun | 2022 | Chemical Research in Chinese Universities2022，38，2： | 0 |
| 7 | A Stable Luminescent Covalent Organic Framework Nanosheet for Sensitive Molecular Recognition显示文摘Despite rapid advances in fluorescence detectors over the past decade,the development of a highly stable,sensitive,and selective fluorescence platform for molecular recognition remains a considerable challenge.Here we report a stable carbazole-based sp2 carbon fluorescence covalent organic framework(COF)nanosheet,termed a JUC-557 nanosheet.Owing to the synergistic effect of aggregation-induced emission-and aggregation-caused quenching-based chromophores,the architecture of the JUC-577 shows high absolute quantum yields(up to 23.0%)in the solid state and when dispersed in various solvents as well as excellent sensing performance toward specific analytes,such as iodine(Ka:2.10×10^(5)M−1 and LOD:302 ppb),2,4,6-trinitrotoluene(Ka:4.38×10^(5)M−1 and LOD:129 ppb),and especially nitrobenzene(Ka:6.18×10^(6)M−1 and LOD:5 ppb)that is superior to that of fluorescence detection materials reported so far.Furthermore,the JUC-557 nanosheet preserves strong luminescence and sensitive recognition,even under harsh conditions,and allows trace detection of various analytes via a handheld UV lamp.These findings pave the way for developing stable ultrathin COF nanomaterials for highly sensitive and selective molecular detection. | Yaozu Liu Junxia Ren Yujie Wang Xin Zhu Xinyu Guan Zisheng Wang Yida Zhou Liangkui Zhu Shilun Qiu Shengxiong Xiao Qianrong Fang | 2023 | CCS Chemistry2023，5，9： | 0 |
| 8 | Porous framework materials for energy&environment relevant applications:A systematic review显示文摘Carbon peaking and carbon neutralization trigger a technical revolution in energy&environment related fields.Development of new technologies for green energy production and storage,industrial energy saving and efficiency reinforcement,carbon capture,and pollutant gas treatment is in highly imperious demand.The emerging porous framework materials such as metal–organic frameworks(MOFs),covalent organic frameworks(COFs)and hydrogen-bonded organic frameworks(HOFs),owing to the permanent porosity,tremendous specific surface area,designable structure and customizable functionality,have shown great potential in major energy-consuming industrial processes,including sustainable energy gas catalytic conversion,energy-efficient industrial gas separation and storage.Herein,this manuscript presents a systematic review of porous framework materials for global and comprehensive energy&environment related applications,from a macroscopic and application perspective. | Yutao Liu Liyu Chen Lifeng Yang Tianhao Lan Hui Wang Chenghong Hu Xue Han Qixing Liu Jianfa Chen Zeming Feng Xili Cui Qianrong Fang Hailong Wang Libo Li Yingwei Li Huabin Xing Sihai Yang Dan Zhao Jinping Li | 2024 | Green Energy & Environment2024，9，2： | 0 |
| 9 | Recent advances in AIEgen-based crystalline porous materials for chemical sensing显示文摘Aggregation-induced emission-based luminogens(AIEgens)have aroused enormous interest due to their unique high fluorescence in a condensed state.To further explore their potential applications,such as chemical monitoring,immobilization of AIE molecules has been widely studied with a variety of supports.Crystalline porous materials,such as metal-organic frameworks,covalent organic frameworks,hydrogen-bonded organic framework,and organic cages,demonstrate well-controlled structures,large surface areas,and promising stabilities,thus providing a perfect platform for AIE agents loading.Outstanding chemical sensing performances are achieved based on these AIE-active crystalline porous materials,such as high sensitivity,short response time,selective identification,and high recyclability,which provide a new alternative to readily detect various hazardous molecules.Furthermore,precise structures of AIEgen-based crystalline porous materials offer an easy way to investigate detection mechanisms.This mini-review will provide a brief overview of AIEgen-based crystalline porous materials for detection and then address how to improve sensing performances remarkably. | Yaozu Liu Xinyu Guan Qianrong Fang | 2021 | Aggregate2021，2，3： | 0 |
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