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| 1 | Ultra-strong phosphorescence with 48% quantum yield from grinding treated thermal annealed carbon dots and boric acid composite显示文摘Metal-free room-temperature phosphorescence(RTP)materials are of great significance for many applications;however,they usually exhibit low efficiency and weak intensity.This article reports a new strategy for the preparation of a high-efficiency and strong RTP materials from crystalline thermal-annealed carbon dots(CDs)and boric acid(BA)composite(g-t-CD@BA)through grinding-induced amorphous to crystallization transition.Amorphous thermal-annealed CDs and BA composite(t-CD@BA)is prepared following a thermal melting and super-cooling route,where the CDs are fully dispersed in molten BA liquid and uniformly frozen in an amorphous thermal annealed BA matrix after super-cooling to room temperature.Upon grinding treatment,the fracture and fragmentation caused by grinding promote the transformation of the high-energy amorphous state to the lower energy crystalline counterparts.As a result,the CDs are uniformly in situ embedded in the BA crystal matrix.This method affords maximum uniform embedding of the CDs in the BA crystals,decreases nonradiative decay,and promotes intersystem crossing by restraining the free vibration of the CDs,thus producing strong RTP materials with the highest reported phosphorescence quantum yield(48%).Remarkably,RTP from g-t-CD@BA powder is strong enough to illuminate items with a delay time exceeding 9 s. | Qijun Li Zhenxiao Zhao Shuai Meng Yuchen Li Yunyang Zhao Bohan Zhang Zikang Tang Jing Tan Songnan Qu | 2022 | SmartMat2022，3，2： | 2 |
| 2 | Radio frequency energy regulates the multi-scale structure,digestive and physicochemical properties of rice starch显示文摘Radio frequency (RF) heating as an emerging technology was applied to regulate the structural,digestive and physicochemical properties of rice starch.In vitro digestibility results showed that RF treatment enhanced the resistant starch content and reduced the rapidly digestible starch content of rice starch,resulting in higher resistant to enzyme hydrolysis.Microstructure analysis indicated that RF treatment caused the granular surface erosions and morphology changes with increasing treatment time.RF treatment did not alter the A-type crystal form of starch,but disrupted the relative crystallinity,short-range molecular order,and lamellar structure in different degrees.Moreover,the DSC results suggested that starch orders with a higher thermal stability formed after RF treatment,thereby reducing the accessibility of starch granules to the enzyme.Furthermore,rapid viscosity analysis revealed that RF treatment significantly reduced the peak viscosity and breakdown of indica and japonica rice starch,while increased them in waxy rice starch.The rheological properties of rice starch were also changed after RF treatment.This work provides a theoretical basis for the application of RF technology in starch modification. | Zhenna Zhang Mengqing Zhang Bin Zhang Yunyang Wang Wei Zhao | 2022 | Food Bioscience2022，47，3： | 2 |
| 3 | Polyetherimide functionalized carbon dots with enhanced red emission in aqueous solution for bioimaging显示文摘Red emissive carbon dots(CDs)are highly desired for biological applications.However,serious luminescence quenching of red emissive CDs in aqueous solution greatly hinders their application in high performance biological imaging.Herein,we reported a facile strategy to realize enhanced red emission of CDs in aqueous solution by surface modification with polyetherimide(PEI)via microwave heating method.High photoluminescence quantum yield(PLQY)of 25%was realized from the PEI functionalized CDs(CDs@PEI)in aqueous solution.The proposed PEI functionalization strategy not only protects the red emission against water molecules quenching,but also reverses the surface charges from negativity to positivity to promote cellular uptake of CDs,leading to clear cell imaging in red fluorescence region.More important,CDs@PEI exhibits much better photostability than commercial red emissive dye(MitoT racker red)in cell fluorescent imaging.Potential application of CDs@PEI on fast staining of cells for clonogenic assay has also been demonstrated. | Liming Wang Bingzhe Wang Enshan Liu Yunyang Zhao Bingchen He Chunfei Wang Guichuan Xing Zikang Tang Yinning Zhou Songnan Qu | 2022 | Chinese Chemical Letters2022，33，8： | 0 |
| 4 | Influence of cadmium and copper mixtures to rhizosphere bacterial communities显示文摘To study the effects of combined Cd and Cu pollution on rhizosphere bacterial community.High-throughput sequencing was used to examine the response of rhizosphere bacterial communities to heavy-metal stress under single and mixed pollution of cadmium(Cd)and copper(Cu).With additions of Cd and Cu,the mean diversity index of rhizosphere bacterial community was in the order Cu alone>Cd-Cu mixtures>Cd alone.In all Cd and Cu treatments,the dominant phyla were Proteobacteria,Actinobacteria,Chloroflexi and Acidobacteria.In the additions with different concentrations of Cd-Cu mixtures,LEfSe indicated that there were differences in the predominant species of rhizosphere bacterial communities.Some genera such as Streptomyces and Microbacterium belonging to Actinobacteria as biomarkers were significantly enriched in both control and treatments,while some genera such as Pseudoxanthomonas and Rhodopseudomonas belonging to Proteobacteria as biomarkers were observed to be enriched in the additions with single and mixture of Cd and Cu.According to the Nonmetric multidimensional scaling(NMDS)analysis,the structure of rhizosphere bacterial community was different between treatments and the CK.Principal Component Analysis(PCA)and permutational multivariate analysis of variance(PERMANOVA)showed that there were significant differences among treatments(p<0.01),and that the addition of Cu might be the primary factor affecting the composition of rhizosphere bacterial communities. | Qirui An Yunyang Li Na Zheng Jincai Ma Shengnan Hou Siyu Sun Sujing Wang Pengyang Li Xiaoqian Li Chunmei Zhao | 2023 | Soil Ecology Letters2023，5，1： | 0 |
| 5 | Determination of Double Beta Decay Half-Life of 136Xe with the PandaX-4T Natural Xenon Detector显示文摘Precise measurement of two-neutrino double beta decay(DBD)half-life is an important step for the searches of Majorana neutrinos with neutrinoless double beta decay.We report the measurement of DBD half-life of 136xe using the Pandax-4T dual-phase Time Projection Chamber(TPC)with 3.7-tonne natural xenon and the first 94.9-day physics data release. | Lin Si Zhaokan Cheng Abdusalam Abdukerim Zihao Bo Wei Chen Xun Chen Yunhua Chen Chen Cheng Yunshan Cheng Xiangyi Cui Yingjie Fan Deqing Fang Changbo Fu Mengting Fu Lisheng Geng Karl Giboni Linhui Gu Xuyuan Guo Ke Han Changda He Jinrong He Di Huang Yanlin Huang Zhou Huang Ruquan Hou Xiangdong Ji Yonglin Ju Chenxiang Li Jiafu Li Mingchuan Li Shu Li Shuaijie Li Qing Lin Jianglai Liu Xiaoying Lu Lingyin Luo Yunyang Luo Wenbo Ma Yugang Ma Yujun Mao Yue Meng Nasir Shaheed Xiaofeng Shang Xuyang Ning Ningchun Qi Zhicheng Qian Xiangxiang Ren Changsong Shang Guofang Shen Wenliang Sun Andi Tan Yi Tao Anqing Wang Meng Wang Qiuhong Wang Shaobo Wang Siguang Wang Wei Wang Xiuli Wang Zhou Wang Yuehuan Wei Mengmeng Wu Weihao Wu Jingkai Xia Mengjiao Xiao Xiang Xiao Pengwei Xie Binbin Yan Xiyu Yan Yong Yang Chunxu Yu Jumin Yuan Ying Yuan Zhe Yuan Dan Zhang Minzhen Zhang Peng Zhang Shibo Zhang Shu Zhang Tao Zhang Li Zhao Qibin Zheng Jifang Zhou Ning Zhou Xiaopeng Zhou Yong Zhou | 2023 | Research2023，，2： | 0 |
| 6 | Steroid and triterpenoid saponins from the rhizomes of Paris polyphylla var.stenophylla显示文摘Five new saponins,including three steroid saponins,paristenoids A-C(1-3),and two triterpenoid saponins,paristenoids D-E(4-5),along with four known ones(6-9)were isolated from the rhizomes of Paris polyphylla var.stenophylla.The structures of the isolated compounds were identified nainly by detailed spectroscopic analysis,including extensive 1D and 2D NMR,MS,as well as chemical methods.Compound 3 is a new cyclocholestanol-type steroidal saponin with a rare 6/6/6/5/5 fused-rings cholestanol skeleton,and this skeleton has been first found from the genus Paris.The cytotoxicities of the isolated compounds against three human three glioma cell lines(U87MG,U251MG and SHG44)were evaluated,and compound 7 displayed certain inhibitory effect with ICso values of 15.22±1.73,18.87±1.81 and 17.64±1.69μmol^(-1),respectively. | HU Jinming LU Yunyang ZHENG Shuxian TIAN Yunyuan LI Tianyi TANG Haifeng YANG Zhao LIU Yang | 2023 | Chinese Journal of Natural Medicines2023，21，10： | 0 |
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