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29篇 您的检索式:作者名="Qingqing Bai"
    题名 作者 年代 出处 被引量
1High-performance planar heterojunction perovskite solar cells: Preserving long charge carrier diffusion lengths and interracial engineering显示文摘Sai Bai Zhongwei Wu Xiaojing Wu Yizheng Jin Ni Zhao Zhihui Chen Qingqing Mei Xin Wang Zhizhen Ye Tao Song Ruiyuan Liu Shuit-tong Lee Baoquan Sun 2014Nano Research2014,7,12:13
2Soil Organic Carbon Contents and Stocks in Coastal Salt Marshes with Spartina alterniflora Following an Invasion Chronosequence in the Yellow River Delta,China显示文摘Plant invasion alters the fundamental structure and function of native ecosystems by affecting the biogeochemical pools and fluxes of materials and energy. Native(Suaeda salsa) and invasive(Spartina alterniflora) salt marshes were selected to study the effects of Spartina alterniflora invasion on soil organic carbon(SOC) contents and stocks in the Yellow River Delta. Results showed that the SOC contents(g/kg) and stocks(kg/m^2) were significantly increased(P < 0.05) after Spartina alterniflora invasion of seven years, especially for the surface soil layer(0–20 cm). The SOC contents exhibited an even distribution along the soil profiles in native salt marshes, while the SOC contents were gradually decreased with depth after Spartina alterniflora invasion of seven years. The natural ln response ratios(Ln RR) were applied to identify the effects of short-term Spartina alterniflora invasion on the SOC stocks. We also found that Spartina alterniflora invasion might cause soil organic carbon losses in a short-term phase(2–4 years in this study) due to the negative Ln RR values, especially for 20–60 cm depth. And the SOCD in surface layer(0–20 cm) do not increase linearly with the invasive age. Spearman correlation analysis revealed that silt + clay content was exponentially related with SOC in surface layer(Adjusted R^2 = 0.43, P < 0.001), suggesting that soil texture could play a key role in SOC sequestration of coastal salt marshes.ZHANG Guangliang BAI Junhong JIA Jia WANG Xin WANG Wei ZHAO Qingqing ZHANG Shuai 2018Chinese Geographical Science2018,28,3:8
3MSX2 mediates entry of human pluripotent stem cells into mesendoderm by simultaneously suppressing SOX2 and activating NODAL signaling显示文摘发信号的 BMP 怎么集成到并且使动摇人的 pluripotent 干细胞(hPSCs ) 的 pluripotency 电路开始区别进单个细菌层是一个长期的难题。这里,我们报导肌肉片断 homeobox 2 (MSX2 ) , msh 家庭的一个 homeobox 抄写因素, BMP 发信号的直接目标基因和 hPSC 到 mesendoderm 的区别的一个主人调停人。MSX2 的强制表示足够废除 pluripotency 并且导致 hPSCs 的指导 mesendoderm 区别,当 MSX2 弄空损害 mesendoderm 正式就职时。MSX2 是在 hPSCs 的 BMP 小径的直接目标基因,并且能被 Wnt 信号 synergistically 在 mesendoderm 正式就职期间经由 LEF1 激活。而且, MSX2 使动摇通过到 SOX2 倡导者和 SOX2 抄写的压抑的直接绑定的 pluripotency 电路,当 MSX2 通过节的倡导者的直接绑定和激活由 SOX2 的同时的抑制和节的表示的正式就职控制 mesendoderm 系承诺时。有趣地, SOX2 能支持 MSX2 蛋白质的降级,建议在在干细胞命运的控制的二个指定系的因素之间的相互的对抗。一起,我们的调查结果揭示使动摇的关键新机制在 hPSCs 的 pluripotency 和指导系承诺。Qingqing Wu Leisheng Zhang Pei Su Xiaohua Lei Xin Liu Hongtao Wang Lisha Lu Yang Bai Tao Xiong Dong Li Zhengmao Zhu Enkui Duan Erlie Jiang Sizhou Feng Mingzhe Hang Yuanfu Xu Fei Wang Jiaxi Zhou 2015Cell Research2015,25,12:8
4Changes of Biogenic Elements in Phragmites australis and Suaeda salsa from Salt Marshes in Yellow River Delta,China显示文摘Little information is available on biogenic elements(carbon, nitrogen, phosphorus and sulfur) and the ecological stoichiometric characteristics of plants in coastal wetlands. To investigate the contents of carbon, nitrogen, phosphorus and sulfur of plants, and their ecological stoichiometric characteristics in the Yellow(Huanghe) River Delta, plant samples were collected from two typical salt marshes(Suaeda salsa and Phragmites australis wetlands) during the period of from August to October in 2007, and the ratios of C/N, C/P, N/P, C/N/P and C/N/P/S were calculated. Results showed that during the studying period, plant C, N and P were lower than the global average values, and plant N and P were lower than the China's average values. Leaf C and S in Suaeda salsa were significantly lower than those in Phragmites australis(P < 0.05), and leaf N and P in Suaeda salsa and Phragmites australis showed no significant differences(P > 0.05). Average C/N ratios were 23.75 in leaf, 73.36 in stem, 65.67 in root of Suaeda salsa, and 33.77 in leaf, 121.68 in stem, 97.13 in root of Phragmites australis. Average C/N ratios of Suaeda salsa and Phragmites australis were all great than 25, indicating the salt marsh in the Yellow River Delta is an N limitation system. Average C/P ratios were 276.78 in leaf, 709.28 in stem and 1031.32 in root of Suaeda salsa, and 536.94 in leaf, 768.13 in stem and 875.22 in root of Phragmites australis. The average N/P ratios of Suaeda salsa were 12.92 in leaf, 10.77 in stem and 10.91 in root, and the average N/P ratios of Phragmites australis were 16.40 in leaf, 7.40 in stem and 6.92 in root, indicating the Suaeda salsa wetlands were N limited and Phragmites australis wetlands were N limited in August and P limited in October in 2007. The average C/N, C/P and C/N/P ratios in Suaeda salsa and Pragmites australis were higher than the global average values, indicating the lower quality of organic matter provided by wetland plants in the Yellow River delta.JIA Jia BAI Junhong WANG Wei ZHANG Guangliang WANG Xin ZHAO Qingqing ZHANG Shuai 2018Chinese Geographical Science2018,28,3:7
5Establishment of a highly efficient hematopoietic differentiation model from human embryonic stem cells for functional screening显示文摘Human embryonic stem cells(hESCs)have been successfully differentiated into hematopoietic progenitor cells with colony formation capacity and further into various kinds of blood cells including erythrocytes,megakaryocytes,neutrophils,nature killer cells and T lymphocytes[1 7].Nevertheless,the differentiation efficiency is extremely low.PANG SuLei WU QingQing TIAN Sha SU Pei BAI Yang GAO Jie YANG YiQing LIU Xin ZHU ZhengMao XU YuanFu ZHOU JiaXi 2013Science China(Life Sciences)2013,56,12:3
6Long-term variations of X-ray pulse profiles for the Crab pulsar:data analysis and modeling显示文摘The pulse profiles of the Crab pulsar(as well as some other pulsars)vary with time.They can lead to a major source of intrinsic timing noise,which lacks a detailed physical model.The phase separation?between the first left peak(P1)and the second right peak(P2)is a key parameter that shows the variations of pulse profiles for the Crab pulsar.It was found that the evolution of?has a tendency with increasing rates of 0.82?±0.25?,0.80?±0.54?,and 0.77?±0.28?per century for the 2-6,6-15,and15-60 ke V bands,respectively.Furthermore,the flux ratios(P2/P1)of X-ray pulse profiles in the three bands were calculated,and the derived flux ratios were consistent with the radio and X-ray measurements of the Insight-HXMT.In addition to discovering the physical origin of the pulse changes,the high-SNR X-ray pulse profiles were simulated in the annular gap model,and two model parameters(e.g.,the maximum emission heights of the two peaks)were observed to slightly affect the variations of peak separation.We fitted the long-term variations of emission heights of the two peaks and discovered that the emission heights showed increasing tendencies with time.Variations of these emission heights induced a characteristic period derivative,and a complete formula for both the magnetic dipole radiation and wind-particle-induced variations of the moment of inertia was used for the pulsar’s spin-down to obtain the variation rate˙αof the magnetic inclination angle,which was-1.60?per century.Intrinsic timing noise is observed to be mainly induced by the variations of pulse profiles,which might correlate with a characteristic spin period derivative arising from the fluctuations of the emission regions.This work will lay a foundation for understanding the origin of intrinsic timing noise and making high-precision timing models in the future.LunHua Shang YuanJie Du XiangQun Cui ShiJun Dang JiGuang Lu JunTao Bai QiJun Zhi YouLi Tuo LinLi Yan LiangWei Huang XinYuan Zhang XiaoMin Bei QingQing Lin GuoJun Qiao Hua Shen RiHong Zhu 2020Science China(Physics,Mechanics & Astronomy)2020,63,10:2
7A compact polarization-integrated long wavelength infrared focal plane array based on In As/GaSb superlattice显示文摘Real-time polarization imaging plays a vital role in target detection,recognition,and tracking in complex scenes.However,large optical crosstalk and the integration technology are difficult problems in the development of polarization-integrated infrared detectors.We demonstrate a monolithic long wavelength infrared(LWIR)In As/Ga Sb superlattice focal plane array(FPA)integrated with the polarizer.To obtain high performance and real-time polarization imaging devices,the parameters of the grating were optimized and the optical crosstalk between adjacent polarization bands was studied.We analyze the light diffraction depending on the distance between the polarizer and photosensitive elements and the coupling between oblique incident light and device.The fabrication process of the antireflective polarizer,the integration technology of the polarizer and the FPA composed of 512×4×3 pixels were explored.Finally,a polarization integrated focal plane array(PI-FPA)was fabricated to detect polarized light with different oscillating directions.The large response extinction ratio of corresponding polarization bands was measured as 50:1,49:1,and 44:1 of 0°,60°,and 120°,respectively.Jian ZHOU Yi ZHOU Ying SHI Fangfang WANG Zhicheng XU Zhizhong BAI Min HUANG Lulu ZHENG Zhaoming LIANG Yihong ZHU Qingqing XU Yiming SHEN Xiangxiao YING Jianxin CHEN 2022Science China(Information Sciences)2022,65,2:2
8A New Indicator for Global Food Security Assessment: Harvested Area Rather Than Cropland Area显示文摘Cropland area has long been used as a key indicator of food security.However,grain yield is not solely controlled by the area of the cropland.Therefore,we proposed a new indicator to assess food security.Results show that from 1992 to 2004,the global cropland area increased by 840200 km^(2)(99.4%),but the grain yield increased only by 310 million t(29.1%);and from 2004 to 2015,the cropland area decreased by 39000 km^(2)(4.64%),but the grain yield increased by 370 million t(70.84%).This result showed that grain yield was not linearly correlated with cropland area,and delimiting the threshold of cropland protection may not guarantee food security.Combined with further correlation analysis,we found that the increase in the global grain yield was more closely related to the harvested area(R^(2)=0.94),which indicated that the harvested area is a more scientific and accurate indicator than cropland area in terms of guaranteeing food security.Therefore,if governments want to ensure the food security,they should choose a new and more accurate indicator:harvested area rather than cropland area.SONG Fengjiao WANG Shijie BAI Xiaoyong WU Luhua WANG Jinfeng LI Chaojun CHEN Huan LUO Xuling XI Huipeng ZHANG Sirui LUO Guofeng YAN Mengqi ZHEN Qingqing 2022Chinese Geographical Science2022,32,2:2
9Preferentially released miR-122 from cyclodextrin-based star copolymer nanoparticle enhances hepatoma chemotherapy by apoptosis induction and cytotoxics efflux inhibition显示文摘Chemotherapy,as one of the most commonly used treatment modalities for cancer therapy,provides limited benefits to hepatoma patients,owing to its inefficient delivery as well as the intrinsic chemo-resistance of hepatoma.Bioinformatic analysis identified the therapeutic role of a liver-specific microRNA-miR-122 for enhancing chemo-therapeutic efficacy in hepatoma.Herein,a cyclodextrin-cored star copolymer nanoparticle system(sCDP/DOX/miR-122)is constructed to co-deliver miR-122 with doxorubicin(DOX)for hepatoma therapy.In this nanosystem,miR-122 is condensed by the outer cationic poly(2-(dimethylamino)ethyl methacrylate)chains of sCDP while DOX is accommodated in the inner hydrophobic cyclodextrin cavities,endowing a sequential release manner of miR-122 and DOX.The preferentially released miR-122 not only directly induces cell apoptosis by down regulation of Bcl-w and enhanced p53 activity,but also increases DOX accumulation through inhibiting cytotoxic efflux transporter expression,which realizes synergistic performance on cell inhibition.Moreover,sCDP/DOX/miR-122 displays remarkably increased anti-tumor efficacy in vivo compared to free DOX and sCDP/DOX alone,indicating its great promising in hepatoma therapy.Qingqing Xiong Yang Bai Run Shi Jian Wang Weiguo Xu Mingming Zhang Tianqiang Song 2021Bioactive Materials2021,6,11:2
10Adsorption characteristics of (-)-epigallocatechin gallate and caffeine in the extract of waste tea on macroporous adsorption resins functionalized with chloromethyl,amino,and phenylamino groups显示文摘LIU Yongfeng BAI Qingqing LOU Song 0,,06:1
11Preparative separation and purification of rebaudioside a from steviol glycosides using mixed-mode macroporous adsorption resins显示文摘LIU Yongfeng DI Duolong BAI Qingqing 0,,17:1
12显示文摘Liu Yongfeng Bai Qingqing Lou Song 2012J Agric Food Chem2012,60,6:1
13Spatial and seasonal distributions of soil phosphorus in a typical seasonal flooding wetland of the Yellow River Delta, China显示文摘Xiaofei Ye Junhong Bai Qiongqiong Lu Qingqing Zhao Junjing Wang 2014Environmental Earth Sciences2014,,11:1
14Soil microbial communities regulate the threshold effect of salinity stress on SOM decomposition in coastal salt marshes显示文摘Salinity stress is one of the critical environmental drivers of soil organic matter(SOM)decomposition in coastal ecosystems.Although the temperature sensitivity(Q_(10))of SOM decomposition has been widely applied in Earth system models to forecast carbon processes,the impact of salinity on SOM decomposition by restructuring microbial communities remains uncovered.Here,we conducted a microcosm experiment with soils collected from the coastal salt marsh in the Yellow River Estuary,which is subjected to strong dynamics of salinity due to both tidal flooding and drainage.By setting a gradient of salt solutions,soil salinity was adjusted to simulate salinity stress and soil carbon emission(CO_(2))rate was measured over the period.Results showed that as salinity increased,the estimated decomposition constants based on first-order kinetics gradually decreased at different temperatures.Below the 20‰salinity treatments,which doubled the soil salinity,Q_(10)increased with increasing salinity;but higher salinity constrained the temperature-related response of SOM decomposition by inhibiting microbial growth and carbon metabolisms.Soil bacteria were more sensitive to salinity stress than fungi,which can be inferred from the response of microbial beta-diversity to changing salinity.Among them,the phylotypes assigned to Gammaproteobacteria and Bacilli showed higher salt tolerance,whereas taxa affiliated with Alphaproteobacteria and Bacteroidota were more easily inhibited by the salinity stress.Several fungal taxa belonging to Ascomycota had higher adaptability to the stress.As the substrate was consumed with the incubation,bacterial competition intensified,but the fungal co-occurrence pattern changed weakly during decomposition.Collectively,these findings revealed the threshold effect of salinity on SOM decomposition in coastal salt marshes and emphasized that salt stress plays a key role in carbon sequestration by regulating microbial keystone taxa,metabolisms,and interactions.Guangliang Zhang Junhong Bai Jia Jia Wei Wang Dawei Wang Qingqing Zhao Chen Wang Guozhu Chen 2023Fundamental Research2023,3,6:1
15Adsorption characteristicsof (-)-epigallocatechin gallate and caffeine in the extract of waste teaon raacroporous adsorption resins functionalized with chloromethyl,amino, and phenylamino groups显示文摘LIU Yongfeng BAI Qingqing LOU Song 2012Journal of Agricultural and FoodChemistry2012,60,6:1
16Single-cell transcriptomic profiling reveals the tumor heterogeneity of small-cell lung cancer显示文摘Small-cell lung cancer(SCLC)is the most aggressive and lethal subtype of lung cancer,for which,better understandings of its biology are urgently needed.Single-cell sequencing technologies provide an opportunity to profile individual cells within the tumor microenvironment(TME)and investigate their roles in tumorigenic processes.Here,we performed high-precision single-cell transcriptomic analysis of~5000 individual cells from primary tumors(PTs)and matched normal adjacent tissues(NATs)from 11 SCLC patients,including one patient with both PT and relapsed tumor(RT).The comparison revealed an immunosuppressive landscape of human SCLC.Malignant cells in SCLC tumors exhibited diverse states mainly related to the cell cycle,immune,and hypoxic properties.Our data also revealed the intratumor heterogeneity(ITH)of key transcription factors(TFs)in SCLC and related gene expression patterns and functions.The non-neuroendocrine(non-NE)tumors were correlated with increased inflammatory gene signatures and immune cell infiltrates in SCLC,which contributed to better responses to immune checkpoint inhibitors.These findings indicate a significant heterogeneity of human SCLC,and intensive crosstalk between cancer cells and the TME at single-cell resolution,and thus,set the stage for a better understanding of the biology of SCLC as well as for developing new therapeutics for SCLC.Yanhua Tian Qingqing Li Zhenlin Yang Shu Zhang Jiachen Xu Zhijie Wang Hua Bai Jianchun Duan Bo Zheng Wen Li Yueli Cui Xin Wang Rui Wan Kailun Fei Jia Zhong Shugeng Gao Jie He Carl MGay Jianjun Zhang Jie Wang Fuchou Tang 2022Signal Transduction and Targeted Therapy2022,7,11:1
17Recent progress in low-cost noncovalently fused-ring electron acceptors for organic solar cells显示文摘The power conversion efficiencies(PCEs)of organic solar cells(OSCs)have improved considerably in recent years with the development of fused-ring electron acceptors(FREAs).Currently,FREAs-based OSCs have achieved high PCEs of over 19%in single-junction OSCs.Whereas the relatively high synthetic complexity and the low yield of FREAs typically result in high production costs,hindering the commercial application of OSCs.In contrast,noncovalently fused-ring electron acceptors(NFREAs)can compensate for the shortcomings of FREAs and facilitate large-scale industrial production by virtue of the simple structure,facile synthesis,high yield,low cost,and reasonable efficiency.At present,OSCs based on NFREAs have exceeded the PCEs of 15%and are expected to reach comparable efficiency as FREAs-based OSCs.Here,recent advances in NFREAs in this review provide insight into improving the performance of OSCs.In particular,this paper focuses on the effect of the chemical structures of NFREAs on the molecule conformation,aggregation,and packing mode.Various molecular design strategies,such as core,side-chain,and terminal group engineering,are presented.In addition,some novel polymer acceptors based on NFREAs for all-polymer OSCs are also introduced.In the end,the paper provides an outlook on developing efficient,stable,and low-cost NFREAs for achieving commercial applications.Qingqing Bai Qiming Liang Henan Li Huiliang Sun Xugang Guo Li Niu 2022Aggregate2022,3,6:1
18Effects of Alpine Wetland Landscapes on Regional Climate on the Zoige Plateau of China显示文摘Junhong Bai Qiongqiong Lu Qingqing Zhao Junjing Wang Hua Ouyang Xiangzheng Deng 2013Advances in Meteorology2013,,:1
19Factors affecting the distribution of microplastics in soils of China显示文摘Microplastics(MPs)are found worldwide in high abundance,posing a potential threat to ecosystems.Despite the ubiquity of MPs in the environment,very little is known about the regional distribution of MPs and underlying factors affecting this distribution in the field,which likely include human activity,but also features of the environment itself.Here,out of a total of 1157 datapoints investigated in 53 Chinese studies,9.68%datapoints were removed as outliers in the heterogeneity analysis.This review revealed that the abundance of MPs was highly heterogeneous.In addition,microplastic(MP)distribution maps based on China demonstrated that the highest abundance of MPs tended to occur near large rivers and central land affected by the intersection of two monsoons.The model-fitting and previous studies showed that MP abundance in China was correlated with longitude,agricultural mulching film usage per capita,temperature,and precipitation.However,due to the heterogeneity of MPs and the low matching degree between the current environmental data and the sampling points,this pattern was not as evident as reported in any single study.Factors affecting the distribution of MPs can not be captured by linear relationships alone,and systematic selection of suitable environmental factors and further model optimization are needed to explore the cause of MP pollution in soil.Overall,this review revealed an uneven distribution of MPs and serves as a reference for model prediction to assess and control plastic pollution in natural soil environments.Yin Liu Matthias CRillig Quan Liu Jingjing Huang Muhammad Amjad Khan Xiaohui Li Qin Liu Qingqing Wang Xuesong Su Linyi Lin Yang Bai Genmao Guo Yi Huang Yong Sik Ok Shan Hu Junfeng Wang Honggang Ni Qing Huang 2023Frontiers of Environmental Science & Engineering2023,17,9:1
20β-decay Study of Tz=-3/2Proton-rich Nucleus 29S显示文摘The exotic decay of nuclei far from the stability has recently become a hot topic of nuclear structure research.The nuclide 29S is not well investigated in the A=4n+1,Tz=-3/2series of strong+β-delayed proton precursors.The decay schemes of these nuclei are characterizedZHONG Fupeng XU Xinxing LIN Chengjian WANG Jiansong LI Zhihuan YANG Lei MA Nanru WANG Dongxi WEN Peiwei SUN Lijie WU Hongyi LUO Diwen WU Chenguang JIANG Ying LIU Yang ZANG Hongliang LIANG Pengfei LI Pengjie LI Xiaojing ZHAO Qingqing SHI Guozhu MA Junbing MA Peng YU Gongming Dipikap Patel BAI Zhen YANG Feng JIA Huiming ZHANG Huanqiao WANG Jianguo YANG Yanyun MA Weihu HU Qiang JIN Shuya ZHOU Xiaohong LI Ren HOU Dongsheng LIU Minliang HU Zhengguo MA Xinwen YANG Weiqing GAO Zhihao DUAN Fangfang YU Yuechao WANG Yufeng WANG Peng ZHOU Qingwu CUI Danteng WANG Xiang HU Liyuan PAN Min ZHANG Gaolong WANG Xiaoyu 2017Annual Report of China Institute of Atomic Energy2017,,1:0
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