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| 1 | Kinsenoside attenuates osteoarthritis by repolarizing macrophages through inactivating NF-κB/MAPK signaling and protecting chondrocytes显示文摘The objective was to investigate the effect of kinsenoside(Kin) treatments on macrophage polarity and evaluate the resulting protection of chondrocytes to attenuate osteoarthritis(OA) progression.RAW264.7 macrophages were polarized to M1/M2 subtypes then administered with different concentrations of Kin. The polarization transitions were evaluated with quantitative real-time polymerase chain reaction(q RT-PCR), confocal observation and flow cytometry analysis. The mechanism of Kin repolarizing M1 macrophages was evaluated by Western blot. Further, macrophage conditioned medium(CM) and IL-1β were administered to chondrocytes. Micro-CT scanning and histological observations were conducted in vivo on anterior cruciate ligament transection(ACLT) mice with or without Kin treatment. We found that Kin repolarized M1 macrophages to the M2 phenotype. Mechanistically, Kin inhibited the phosphorylation of IκBα, which further reduced the downstream phosphorylation of P65 in nuclear factor-κB(NF-κB) signaling. Moreover, Kin inhibited mitogen-activated protein kinases(MAPK) signaling molecules p-JNK, p-ERK and p-P38. Additionally, Kin attenuated macrophage CM and IL-1β-induced chondrocyte damage. In vivo, Kin reduced the infiltration of M1 macrophages,promoted M2 macrophages in the synovium, inhibited subchondral bone destruction and reduced articular cartilage damage induced by ACLT. All the results indicated that Kin is an effective therapeutic candidate for OA treatment. | Feng Zhou Jingtian Mei Xiuguo Han Hanjun Li Shengbing Yang Minqi Wang Linyang Chu Han Qiao Tingting Tang | 2019 | Acta Pharmaceutica Sinica B2019，9，5： | 35 |
| 2 | An Analysis and Modeling Study of a Sea Fog Event over the Yellow and Bohai Seas显示文摘In this study, a sea fog event which occurred on 27 March 2005 over the Yellow and Bohai Seas was investigated obser- vationally and numerically. Almost all available observational data were used, including satellite imagery of Geostationary Opera- tional Environmental Satellite (GOES)-9, three data sets from station observations at Dandong, Dalian and Qingdao, objectively reanalyzed data of final run analysis (FNL) issued by the National Center for Environmental Prediction (NCEP) and Regional At- mospheric Modeling System (RAMS) results. Synoptic conditions and fog characteristics were analyzed. The fog formed when warm, moist air was advected northwards over the cool water of the Yellow and Bohai Seas, and dissipated when a cold front brought northerly winds and cool, dry air. In order to better understand the fog formation mechanism, a high-resolution RAMS modeling with a 6 km×6 km grid, initialized and validated by FNL data, was designed. A 48 h modeling that started from 12 UTC 26 March 2005 reproduced the main characteristics of this sea fog event. The simulated lower visibility area agreed reasonably well with the sea fog region identified from the satellite imagery. Advection cooling effect seemed to play a significant role in the fog formation. | FU Gang GUO Jingtian Angeline Pendergrass LI Pengyuan | 2008 | Journal of Ocean University of China2008，7，1： | 26 |
| 3 | Photoreduction of CO_2 to methanol over Bi_2S_3/CdS photocatalyst under visible light irradiation显示文摘The Bi2S3,CdS and Bi2S3/CdS photocatalysts were prepared by direct reactions between their corresponding salt and thiourea in a hy- drothermal autoclave.The photocatalytic activities of these photocatalysts for reducing CO2 to CH3OH under visible light irradiation have been investigated.The results show that the photocatalytic activity and visible light response of Bi2S3 are higher than those of CdS.The Bi2S3 modification can enhance the photocatalytic activity and visible light response of CdS.The photocatalytic activity of Bi2S3/CdS hetero-junction photocatalyst was the highest and the highest yields of methanol was 613μmol/g when the weight proportion of Bi2S3 to CdS was 15%,which was about three times as large as that of CdS or two times of that of Bi2S3. | Xin Li Juntao Chen Huiling Li Jingtian Li Yitao Xu Yingju Liu Jiarong Zhou | 2011 | Journal of Natural Gas Chemistry2011，20，4： | 11 |
| 4 | Arsenic fractionation and contamination assessment in sediments of thirteen lakes from the East Plain and Yungui Plateau Ecoregions, China显示文摘Arsenic(As) fractions in the sediments of seven lakes from East Plain Ecoregion and six lakes from Yungui Plateau Ecoregion, China, were investigated. Results indicated that the total As concentrations in sediment samples of lakes of the East Plain Lake Ecoregion are higher than those of Yungui Plateau Lake Ecoregion. Residual As is the main fraction in sediment samples of lakes from both ecoregions, followed by reducible As and soluble or oxidizable As. The total As is correlated to oxidizable As and residual As in sediment samples from both lake ecoregions. As distribution in sediment samples of lakes of the East Plain Ecoregion appears to be affected by human activity, while the As origin mainly comes from natural sources in sediment samples of lakes in the Yungui Plateau Ecoregion. The potential ecological risk index and geoaccumulation index values suggest 'low to moderate' risk degree and 'unpolluted to moderately polluted' for As in the studied lake sediments. | Fengyu Zan Shouliang Huo Jingtian Zhang Li Zhang Beidou Xi Lieyu Zhang | 2014 | Journal of Environmental Sciences2014，26，10： | 7 |
| 5 | The Structure and Formation Mechanism of a Sea Fog Event over the Yellow Sea显示文摘In this paper, a heavy sea fog event occurring over the Yellow Sea on 11 April 2004 was investigated based upon observational and modeling analyses. From the observational analyses, this sea fog event is a typical advection cooling case. Sea surface temperature(SST) and specific humidity(SH) show strong gradients from south to north, in which warm water is located in the south and consequently, moisture is larger in the south than in the north due to evaporation processes. After fog formation, evaporation process provides more moisture into the air and further contributes to fog evolution. The sea fog event was reproduced by the Regional Atmospheric Modeling System(RAMS) reasonably. The roles of important physical processes such as radiation, turbulence as well as atmospheric stratification in sea fog's structure and its formation mechanisms were analyzed using the model results. The roles of long wave radiation cooling, turbulence as well as atmospheric stratification were analyzed based on the modeling results. It is found that the long wave radiative cooling at the fog top plays an important role in cooling down the fog layer through turbulence mixing. The fog top cooling can overpower warming from the surface. Sea fog develops upward with the aid of turbulence. The buoyancy term, i.e., the unstable layer, contributes to the generation of TKE in the fog region. However, the temperature inversion layer prevents fog from growing upward. | GUO Jingtian LI Pengyuan FU Gang ZHANG Wei GAO Shanhong ZHANG Suping | 2015 | Journal of Ocean University of China2015，14，1： | 4 |
| 6 | To image,or not to image:class-specific diffractive cameras with all-optical erasure of undesired objects显示文摘Privacy protection is a growing concern in the digital era,with machine vision techniques widely used throughout public and private settings.Existing methods address this growing problem by,e.g.,encrypting camera images or obscuring/blurring the imaged information through digital algorithms.Here,we demonstrate a camera design that performs class-specific imaging of target objects with instantaneous all-optical erasure of other classes of objects.This diffractive camera consists of transmissive surfaces structured using deep learning to perform selective imaging of target classes of objects positioned at its input field-of-view.After their fabrication,the thin diffractive layers collectively perform optical mode filtering to accurately form images of the objects that belong to a target data class or group of classes,while instantaneously erasing objects of the other data classes at the output field-of-view.Using the same framework,we also demonstrate the design of class-specific permutation and class-specific linear transformation cameras,where the objects of a target data class are pixel-wise permuted or linearly transformed following an arbitrarily selected transformation matrix for all-optical class-specific encryption,while the other classes of objects are irreversibly erased from the output image.The success of class-specific diffractive cameras was experimentally demonstrated using terahertz(THz)waves and 3D-printed diffractive layers that selectively imaged only one class of the MNIST handwritten digit dataset,all-optically erasing the other handwritten digits.This diffractive camera design can be scaled to different parts of the electromagnetic spectrum,including,e.g.,the visible and infrared wavelengths,to provide transformative opportunities for privacy-preserving digital cameras and task-specific data-efficient imaging. | Bijie Bai Yi Luo Tianyi Gan Jingtian Hu Yuhang Li Yifan Zhao Deniz Mengu Mona Jarrahi Aydogan Ozcan | 2022 | eLight2022，2，1： | 4 |
| 7 | Apparent relationships between anthropogenic factors and climate change indicators and POPs deposition in a lacustrine system显示文摘Climate change and anthropogenic activities are expected to impact the environmental behaviors and fates of persistent organic pollutants(POPs), however, quantitative studies on these combined factors are scarce. In this study, dichlorodiphenyltrichloroethane(DDTs), polycyclic aromatic hydrocarbons(PAHs), and polychlorinated biphenyls(PCBs)were used as examples to identify how and when those factors may be related to the deposition of POPs in the sediment of Lake Chaohu, China, using generalized additive models(GAMs). Three historical trends of DDT, PAH, and PCB deposition were delineated in a dated sediment core encompassing ~100 years of historical record: a steady state or gradually increasing stage, a rapidly increasing stage, and a declining stage. The GAM results showed that aquatic total phosphorus(TP) concentrations and regional GDP(anthropogenic factors) were dominant contributors to POP accumulation rates in the lake sediment. The fitted relationships between air temperature and sedimentary DDT and PAH concentrations were linear and negative, while a positive linear relationship was found for PCBs, suggesting that Lake Chaohu may have become a net source for DDTs and PAHs, and a sink for PCBs, under a progressively warming climate. | Hanxiao Zhang Shouliang Huo Kevin M. Yeager Chaocan Li Beidou Xi Jingtian Zhang Zhuoshi He Chunzi Ma | 2019 | Journal of Environmental Sciences2019，31，9： | 4 |
| 8 | NONLINEAR EFFECT OF THE DUALFREQUENCY IP SPECTRUM显示文摘NONLINEAREFFECTOFTHEDUALFREQUENCYIPSPECTRUMHeJishan;LiDaqing;TangJingtian(DepartmentofGeology,CentralSouthUniversityofTechnol... | He Jishan Li Daqing Tang Jingtian(Department of Geology,Central South University of Technology,Changsha 410083) | 1995 | 中国有色金属学会会刊:英文版1995，5，4： | 2 |
| 9 | Active Vaccine Safety Surveillance: Global Trends and Challenges in China显示文摘Importance.The great success in vaccine-preventable diseases has been accompanied by vaccine safety concerns.This has caused vaccine hesitancy to be the top 10 in threats to global health.The comprehensive understanding of adverse events following immunization should be entirely based on clinical trials and postapproval surveillance.It has increasingly been recognized worldwide that the active surveillance of vaccine safety should be an essential part of immunization programs due to its complementary advantages to passive surveillance and clinical trials.Highlights.In the present study,the framework of vaccine safety surveillance was summarized to illustrate the importance of active surveillance and address vaccine hesitancy or safety concerns.Then,the global progress of active surveillance systems was reviewed,mainly focusing on population-based or hospital-based active surveillance.With these successful paradigms,the practical and reliable ways to create robust and similar systems in China were discussed and presented from the perspective of available databases,methodology challenges,policy supports,and ethical considerations.Conclusion.In the inevitable trend of the global vaccine safety ecosystem,the establishment of an active surveillance system for vaccine safety in China is urgent and feasible.This process can be accelerated with the consensus and cooperation of regulatory departments,research institutions,and data owners. | Zhike Liu Ruogu Meng Yu Yang Keli Li Zundong Yin Jingtian Ren Chuanyong Shen Zijian Feng Siyan Zhan | 2021 | Health Data Science2021，，1： | 2 |
| 10 | SOD1^(G93A) Induces a Unique PSAP-Dependent Mitochondrial Apoptosis Pathway via Bax-Bak Interaction显示文摘Amyotrophic lateral syndrome(ALS)is a progressive degenerative disorder characterized by motor neuron death and axon degeneration.Mitochondrial dysfunction plays a key role in the pathogenesis of ALS,the mechanism of which remains poorly understood.The B-cell lymphoma-2(Bcl-2)family of proteins that control and mediate mitochondrial function and apoptosis,including the pro-apoptotic members Bcl2-Associated X(Bax),are involved in ALS development.The death receptor 6(DR6)regulates motor neuron death in ALS,and DR6 antibodies can prevent axon degeneration and motor neuron damage by blocking DR6.Previous studies demonstrated that PSAP localized to mitochondria and was required for DR6-induced apoptosis.In this study,SOD1^(G93A) was transfected into the motor neuron cell line NSC-34 to serve as an ALS cell model in vitro.The data assessed the role of PSAP in SOD1^(G93A)induced apoptosis and demonstrated that the overexpression of SOD1^(G93A),but not wtSOD1,induced PARP cleavage,caspase-3 activation,cytochrome c release,and Bax translocation.PSAP,Bax,and Bak were necessary for SOD1^(G93A)induced apoptosis,as silencing PSAP inhibited SOD1^(G93A)-mediated cell death that was dependent on Bax-Bak interaction. | HAN NIU XIN CHEN XUEQI FU JINGTIAN ZHANG GUODONG LI YUXIANG WANG JIAYUE SONG XUETING MA CHEN HU XUEMIN XU FUQIANG ZHANG LINLIN ZENG | 2021 | BIOCELL2021，45，4： | 2 |
| 11 | Efficacy of Danggui Buxue decoction(当归补血汤)on diabetic nephropathy-induced renal fibrosis in rats and possible mechanism显示文摘OBJECTIVE:To observe the efficacy of Danggui Buxue decoction(当归补血汤,DBD) on diabetic nephropathyinduced renal fibrosis in rats,and to study the possible mechanism.METHODS:Sixty male Goto Kakizaki(GK) rats were randomly assigned to the model group,gliquidone group,astragaloside Ⅳ group,and high-,medium-and lowdoses DBD groups.After 8 weeks,changes in body weight,blood glucose,serum creatinine,serum urea nitrogen,and total cholesterol were observed.Changes in transforming growth factor-β1(TGF-β1),Smad3,and Smad5 pathways and the expression of the fibrosisrelated proteins collagen Ⅳ(col Ⅳ),α-smooth muscle actin(α-SMA),and vimentin were assessed.The degree of renal fibrosis was observed by immunohistochemistry and Mason staining.The expression of interleukin 6(IL-6),interleukin 10(IL-10),tumor necrosis factor(TNF-α),and C-reactive protein(CRP) in the kidneys was assessed using enzyme linked immunosorbent assay.RESULTS:Our experiments showed that DBD effectively reduced blood glucose,blood urea nitrogen,and creatinine levels after 8 weeks of administration,improved renal function in diabetic rats,alleviated renal fibrosis,and reduced the renal tissue levels of IL-6,IL-10,TNF-α,and CRP.Furthermore,DBD decreased the expression of TGF-β1,Smad3,col IV,α-SMA,and vimentin in renal tissues and increased the expression of Smad5.CONCLUSIONS:DBD ameliorates diabetic renal interstitial fibrosis by modulating the TGF-β1/Smads pathway. | ZHAO Ye WANG Xian GU Ling LI Zihang ZHU Jingtian WANG Wenkai ZHANG Liang XUE Mei | 2023 | Journal of Traditional Chinese Medicine2023，43，3： | 2 |
| 12 | Bioinformatic analysis of chromatin organization and biased expression of duplicated genes between two poplars with a common whole-genome duplication显示文摘The nonrandom three-dimensional organization of chromatin plays an important role in the regulation of gene expression.However,it remains unclear whether this organization is conserved and whether it is involved in regulating gene expression during speciation after whole-genome duplication(WGD)in plants.In this study,high-resolution interaction maps were generated using high-throughput chromatin conformation capture(Hi-C)techniques for two poplar species,Populus euphratica and Populus alba var.pyramidalis,which diverged~14 Mya after a common WGD.We examined the similarities and differences in the hierarchical chromatin organization between the two species,including A/B compartment regions and topologically associating domains(TADs),as well as in their DNA methylation and gene expression patterns.We found that chromatin status was strongly associated with epigenetic modifications and gene transcriptional activity,yet the conservation of hierarchical chromatin organization across the two species was low.The divergence of gene expression between WGD-derived paralogs was associated with the strength of chromatin interactions,and colocalized paralogs exhibited strong similarities in epigenetic modifications and expression levels.Thus,the spatial localization of duplicated genes is highly correlated with biased expression during the diploidization process.This study provides new insights into the evolution of chromatin organization and transcriptional regulation during the speciation process of poplars after WGD. | Le Zhang Jingtian Zhao Hao Bi Xiangyu Yang Zhiyang Zhang Yutao Su Zhenghao Li Lei Zhang Brian J.Sanderson Jianquan Liu Tao Ma | 2021 | Horticulture Research2021，8，1： | 2 |
| 13 | An Observational Study of Typhoon Imbudo in 2003显示文摘Typhoon Imbudo was a super-typhoon over the northwestern Pacific in 2003. It caused tremendous damage when it made landfalls in the Philippines and China. This paper documents observational analyses of Typhoon Imbudo during its landfall in China. All available observations are used to study its motion, intensity changes, convection, structure and precipitation. Best-track data indicate that Imbudo moved west-northwestward until 1800 UTC 23 July and then turned northwestward. FNL (final) analysis data show that the motion of Imbudo is dominated by changes of the subtropical high. At Imbudo's mature stage, the minimum sea level pressure dropped to 910 hPa and the maximum sustained winds were as high as 67 m s 1, which is the intensity of a super-typhoon. The surface wind field exhibited asymmetric characteristics. Polar-orbiting satellite imagery also manifested convective asymmetry before Imbudo made landfall in China. Analyzed the vertical wind shear, it is shown that the convection has a downshear-left pattern. All kinds of precipitation data were used to identify the asymmetric characteristic of the rainfall associated with the Imbudo. The maximum rainfalls were located in the southern boundary area between Guangxi and Guangdong. However, the lack of in situ observations limited further analyses of this typhoon. | LI Qingqing FU Gang GUO Jingtian YANG Yuqiang DUAN Yihong | 2005 | Journal of Ocean University of China2005，4，4： | 1 |
| 14 | Diagnosis and Numerical Modeling of an Explosive Cyclone over the Northwestern Pacific显示文摘An explosive cyclone that took place over the Northwestern Pacific from 12 UTC 18 to 18 UTC 21 November 2007 was investigated.The synoptic situations and structure of this cyclone were documented by using the 1°×1°final analysis data of the National Center for Environmental Prediction.This cyclone developed explosively around 18 UTC 19 and reached its maximum deepening rate(MDR,1.3 Bergeron)around 06 UTC 20 November 2007.At its MDR moment,the surface cyclone center was located in the downstream of the upper-level trough and northern entrance zone of the upper-level jet.The diagnosis using Zwack-Okossi equation suggested that cyclonic-vorticity advection and warm air advection acted to deepen this cyclone,while adiabatic cooling suppressed its development.In an investigation of this cyclone development,numerical sensitivity results obtained by using the Weather and Research Forecasting model showed that the latent heat release in the lower level had less contribution,whereas the surface sensible and latent fluxes played important roles.With a warmer ocean surface,the cyclone tended to intensify.Two topography tests were designed to examine the mountain influences on the development of this cyclone:removing a mountain and doubling the height of a mountain.Results show that the Changbai Mountains suppressed the development of the cyclone by preventing the southern moisture air from invading the inland.Without the moisture air,no latent heat release occurs when this cyclone passes over the Changbai Mountains. | SUN Baitang LI Pengyuan ZHANG Shuqin GUO Jingtian FU Gang | 2021 | Journal of Ocean University of China2021，20，4： | 1 |
| 15 | De-Noising Algo-rithm for Magnetotelluric Signal Based on Mathema-tical Morphology Filtering显示文摘 | Li Jin Tang Jingtian Xiao Xiao | | 0，，11： | 1 |
| 16 | Hydrogen sulfide inhibits beta-amyloid peptide-induced apoptosis in PC12 cells and the underlying mechanisms显示文摘BACKGROUND:Studies have demonstrated that hydrogen sulfide(H2S) levels are 55% lower in brains of Alzheimer's disease(AD) patients than in age-matched normal individuals,which suggests that H2S might be involved in some aspects of AD pathogenesis.OBJECTIVE:To observe the protective mechanisms of varied concentrations of H2S against β-amyloid-peptide(Aβ) induced apoptosis in pheochromoytoma(PC12) cells,and to analyze the pathway of action.DESIGN,TIME AND SETTING:A controlled,observational,in vitro experiment was performed at Neurophysiology Laboratory in Zhongshan Medical School,Sun Yat-sen University between July 2006 and May 2007.MATERIALS:PC12 cells were provided by the Animal Experimental Center of Medical School of Sun Yat-sen University.Glybenclamide,rhodamine123,and dihydrorhodamine123 were purchased from Sigma(USA).METHODS:PC12 cells were incubated at 37 ℃ in a 5% CO2-enriched incubator with RPMI-1640 medium,supplemented with 5% horse-serum and 10% fetal bovine serum.Cells in logarithmic growth curves received different treatment:The PC12 cells were maintains at 37 ℃ with the original medium,then incubated in Aβ25-35,sodium hydrosulfide(NaHS),glybenclamide,NaHS+ Aβ25-35,or pretreated with glybenclamide 30 minutes prior to administration of and Aβ25-35,respectively.MAIN OUTCOME MEASURES:(1) The survival rate of PC12 cells was detected by MTT assay and Hoechst staining.(2) The apoptosis rate of PC12 cells was detected utilizing flow cytometry with propidium iodide staining,and morphological changes of apoptotic cells were observed.(3) The mitochondrial membrane potential was detected by Rhodamine123-combined flow cytometry.(4) The intracellular reactive oxygen species content was detected by dihydrorhodamine123-combined flow cytometry.RESULTS:Aβ25-35 induced significantly decreased viability and increased percentage of apoptosis in PC12 cells,as well as dissipated mitochondrial membrane potential expression and an overproduction of reactive oxygen species.When PC12 cells were co-treated with NaHS and Aβ25-35,the decreased cell viability induced by 20 μmol/L Aβ25-35 was concentration-dependently blocked by NaHS(50,100,and 200 μmol/L).NaHS(100 μmol/L) obviously reduced the percentage of apoptotic PC12 cells induced by 20 μmol/L Aβ25-35.In addition,100 μmol/L NaHS inhibited mitochondrial membrane potential dissipation and reactive oxygen species overproduction.When the ATP-sensitive K channel(KATP) inhibitor,glybenclamide,was administered 30 minutes prior to NaHS and Aβ25-35 treatment,the NaHS-dependent cellular protection was partly blocked.This resulted in reduced PC12 cell viability and increased the percentage of apoptosis,as well as significantly blocked mitochondrial membrane potential preservation and inhibited reactive oxygen species overproduction due to NaHS treatment.CONCLUSION:NaHS protected PC12 cells against Aβ25-35-induced damage.NaHS-dependent cellular protection was associated with mitochondrial membrane potential preservation and inhibition of reactive oxygen species overproduction.The KATP channel inhibitor,glybenclamide,significantly blocked the cellular protective effects of NaHS,indicating that KATP channel activation plays an important role in NaHS-induced protection of PC12 cells to Aβ25-35-induced damage. | Xiuqin Chen Jingtian Li Jinhui Zou Bailing Li Meng Wang | 2008 | Neural Regeneration Research2008，3，9： | 1 |
| 17 | Therapeutic effects of neuregulin-1 gene transduction in rats with myocardial infarction显示文摘 | Jian Xiao Bingong Li Zeqi Zheng Menghong Wang Jingtian Peng Yong Li Zhe Li | 2012 | Coronary Artery Disease2012，，7： | 1 |
| 18 | High-member low-dimensional Sn-based perovskite solar cells显示文摘Sn-based perovskites are promising thin-film photovoltaic materials for their ideal bandgap and the eco-friendliness of Sn,but the performance of Sn-based perovskite solar cells is hindered by the short carrier diffusion length and large defect density in nominally-synthesized Sn-based perovskite films.Herein we demonstrate that a long carrier diffusion length is achievable in quasi-2D Sn-based perovskite films consisting of high-member low-dimensional Ruddlesden-Popper(RP)phases with a preferred crystal orientation distribution.The key to the film synthesis is the use of a molecular additive formed by phenylethylammonium cations and optimally mixed halide-pseudohalide anions,which favorably tailors the quasi-2D Sn-based perovskite crystallization kinetics.The high-member RP film structure effectively enhances device short-circuit current density,giving rise to an increased power conversion efficiency(PCE)of 14.6%.The resulting device demonstrates a near-unity shelf stability upon1,000 h in nitrogen.A high reproductivity is also achieved with a count of 50 devices showing PCEs within a narrow range from minimum 13.0%to maximum 14.6%. | Hansheng Li Zihao Zang Qi Wei Xianyuan Jiang Mingyu Ma Zengshan Xing Jingtian Wang Danni Yu Fei Wang Wenjia Zhou Kam Sing Wong Philip C.Y.Chow Yuanyuan Zhou Zhijun Ning | 2023 | Science China Chemistry2023，66，2： | 0 |
| 19 | Warming-induced phenological mismatch between trees and shrubs explains high-elevation forest expansion显示文摘Despite the importance of species interaction in modulating the range shifts of plants,little is known about the responses of coexisting life forms to a warmer climate.Here,we combine long-term monitoring of cambial phenology in sympatric trees and shrubs at two treelines of the Tibetan Plateau,with a meta-analysis of ring-width series from 344 shrubs and 575 trees paired across 11 alpine treelines in the Northern Hemisphere.Under a spring warming of+1℃,xylem resumption advances by 2-4 days in trees,but delays by 3-8 days in shrubs.The divergent phenological response to warming was due to shrubs being3.2 times more sensitive than trees to chilling accumulation.Warmer winters increased the thermal requirement for cambial reactivation in shrubs,leading to a delayed response to warmer springs.Our meta-analysis confirmed such a mechanism across continental scales.The warming-induced phenological mismatch may give a competitive advantage to trees over shrubs,which would provide a new explanation for increasing alpine treeline shifts under the context of climate change. | Xiaoxia Li Eryuan Liang JJulio Camarero Sergio Rossi Jingtian Zhang Haifeng Zhu Yongshuo H.Fu Jian Sun Tao Wang Shilong Piao Josep Penuelas | 2023 | National Science Review2023，10，10： | 0 |
| 20 | Factors related to aggravated Cylindrospermopsis(cyanobacteria)bloom following sediment dredging in an eutrophic shallow lake显示文摘In recent years,Cylindrospermopsis raciborskii blooms have been widely found worldwide.Topics dealing with the mitigation of C.raciborskii bloom is of great importance for toxins produced could threaten public health.The paper first investigated C.raciborskii dynamics over three years following sediment dredging in a shallow eutrophic Lake Dongqian(China).Based on rpoC1 gene copies,C.raciborskii bloom formed with average density of 1.30×10^(6) cells/L on July 2009.One year later after sediment dredging,C.raciborskii cell density decreased below 1.17×10^(5) cells/L or under detected limits during summer days on 2010.While two years later,the C.raciborskii bloom period was returned with markedly increased cell density reaching up to 4.15×10^(7) cells/L on October 2011,and the maximum peak density was shown at 20.3C that was much lower than reported optimal growth temperature.Inferred from Spearman correlation analysis,linear regression showed C.raciborskii density was significant and positive with pH and SD,whereas they were significant and negative with TP and DO.Multiple regression analysis further demonstrated that TN,TP,SRP,pH and DO provided the best model and explained 53.1% of the variance in C.raciborskii dynamics.The approaches managing nutrients reduction might not control C.raciborskii bloom as extremely low TN(avg.0.18 mg/L)and TP concentrations(avg.0.05 mg/L)resulted in the highest C.raciborskii cell density after sediment dredging. | Xiaochuang Li Shouliang Huo Jingtian Zhang Zhe Xiao Beidou Xi Renhui Li | 2020 | Environmental Science and Ecotechnology2020，，2： | 0 |
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