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| 1 | Genetic diversity analysis of spawner and recaptured populations of Chinese shrimp(Fenneropenaeus chinensis)during stock enhancement in the Bohai Bay based on an SSR marker显示文摘Eight microsatellite markers were used to analyze genetic diversity, level of inbreeding, and effective population size of spawner and recaptured populations of Chinese shrimp(Fenneropenaeus chinensis) during stock enhancement in the Bohai Bay in 2013. A total of 254 and 238 alleles were identified in the spawner and recaptured populations, respectively, and the numbers of alleles(N_a) were 8–63 and 6–60, respectively. The numbers of effective alleles(N_e) were 2.52–21.60 and 2.67–20.72, respectively. The polymorphism information content ranged from 0.529 to 0.952. The observed heterozygosity(H_o) values(0.638–0.910 and 0.712–0.927) were lower than the expected heterozygosity(H_e) values(0.603–0.954 and 0.625–0.952), which indicated that the two populations possessed a rich genetic diversity. In 16 tests(2 populations×8 loci), 13 tests deviated from the HardyWeinberg equilibrium. F_(is) values were positive at seven loci and the inbreeding coefficients(F) of the two populations estimated by trio ML were 13.234% and 11.603%, suggesting that there was a relatively high degree of inbreeding. A certain level of inbreeding depression had occurred in the Chinese shrimp population. F_(st) values ranged from 0 to 0.059, with a mean of 0.028, displaying a low level of genetic differentiation in the two populations. Effective population sizes(3 060.2 and 3 842.8) were higher than the minimum number suggested for retaining the evolutionary potential to adapt to new environmental conditions. For enhancement activity in 2014,the ideal number of captured shrimp spawners should have ranged from 7 686 to 19 214 to maintain genetic diversity and effective population size. Further strategies to adjust the balance of economic cost, fishing effort and ideal number of shrimp spawners to maintain a satisfactory effective population size for ensuring the sustainability of Chinese shrimp are proposed. | WANG Mosang WANG Weiji XIAO Guangxia LIU Kefeng HU Yulong TIAN Tao KONG Jie JIN Xianshi | 2016 | Acta Oceanologica Sinica2016，35，8： | 11 |
| 2 | Study on the morphology, crystalline structure and thermal properties of yam starch acetates with different degrees of substitution显示文摘This study was carried out to understand and establish the changes in physicochemical properties of starch extracted from Chinese yam (Dioscorea opposita Thunb.) after acetylation. Yam starch acetates with different degrees of substitution (DS) were prepared by the reaction of yam starch with glacial acetic acid/acetic anhydride using sulfuric acid as the catalyst. Their formation was confirmed by the presence of the carbonyl signal around 1750 cm-1 in the Fourier transform infrared (FT-IR) spectra. The thermal behavior of the native starch and starch acetate were investigated using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The results reveal that the starch acetates are more thermally stable than the native starch. The starch esters showed 50% weight loss at tem- peratures from 328℃ to 372 ℃ , while the native starch underwent 50% weight loss at 325℃ . The glass transition temperature (Tg) of the starch decreased from 273℃ to 226℃. The X-ray diffraction (XRD) patterns could be classified as typical of the C-type for yam starch. X-ray diffraction also showed the loss of the ordered C-type starch crystalline structure and the degree of crystallinity of starch de- creased from 36.10% to 10.96% with the increasing DS. The scanning electron microscopy (SEM) sug- gested that the most of the starch granules disintegrated with many visible fragments with the in- creasing DS. | WANG Xu GAO WenYuan ZHANG LiMing XIAO PeiGen YAO LiPing LIU Yi LI KeFeng XIE WeiGuang | 2008 | Science China Chemistry2008，51，9： | 11 |
| 3 | Investigate of in situ sludge reduction in sequencing batch biofilm reactor:Performances,mechanisms and comparison of different carriers显示文摘Biofilm is an effective simultaneous denitrification and in situ sludge reduction system,and the characteristics of different biofilm carrier have important implications for biofilm growth and in situ sludge reduction.In this study,the performance and mechanism of in situ sludge reduction were compared between FSC-SBBR and SC-SBBR with constructed by composite floating spherical carriers(FSC)and multi-faceted polyethylene suspension carriers(SC),respectively.The variation of EPS concentration indicated that the biofilm formation of FSC was faster than SC.Compared with SCSBBR,the FSC-SBBR yielded 0.16 g MLSS/g COD,almost 27.27%less sludge.The average removal rates of COD and NH_(4)^(+)-N were 93.39% and 96.66%,respectively,which were 5.21% and 1.43% higher than the average removal rate of SC-SBBR.Investigation of the mechanisms of sludge reduction revealed that,energy uncoupling metabolism and sludge decay were the main factors for sludge reduction inducing 43.13%and 49.65%less sludge,respectively,in FSC-SBBR.EEM fluorescence spectroscopy and SUVA analysis showed that the hydrolytic capacity of biofilm attached in FSC was stronger than those of SC,and the hydrolysis of EPS released more DOM contributed to lysis-cryptic growth metabolism.In additional,Bacteroidetes and Mizugakiibacter associated with sludge reduction were the dominant phylum and genus in FCS-SBBR.Thus,the effect of simultaneous in situ sludge reduction and pollutant removal in FSC-SBBR was better. | Yonglei Wang Baozhen Liu Kefeng Zhang Yongjian Liu Xuexin Xu Junqi Jia | 2018 | Frontiers of Environmental Science & Engineering2018，12，5： | 7 |
| 4 | Spatio-temporal variability of phytoplankton assemblages and its controlling factors in spring and summer in the Subei Shoal of Yellow Sea, China显示文摘The Subei Shoal is a special coastal area with complex physical oceanographic properties in the Yellow Sea.In the present study,the distribution of phytoplankton and its correlation with environmental factors were studied during spring and summer of 2012 in the Subei Shoal of the Yellow Sea.Phytoplankton species composition and abundance data were accomplished by Utermohl method.Diatoms represented the greatest cellular abundance during the study period.In spring,the phytoplankton cell abundance ranged from 1.59×10^3 to 269.78×10^3 cell/L with an average of 41.80×10^3 cell/L,and Skeletonema sp.and Paralia sulcata was the most dominant species.In summer,the average phytoplankton cell abundance was 72.59×10^3 cell/L with the range of 1.78×10^3 to 574.96×10^3 cell/L,and the main dominant species was Pseudo-nitzschia pungens,Skeletonema sp.,Dactyliosolen fragilissima and Chaetoceros curvisetus.The results of a redundancy analysis(RDA)showed that turbidity,temperature,salinity,pH,dissolved oxygen(DO),the ratio of dissolved inorganic nitrogen to silicate and SiO4-Si(DIN/SiO4-Si)were the most important environmental factors controlling phytoplankton assemblages in spring or summer in the Subei Shoal of the Yellow Sea. | Yuanzi Huo Honghua Shi Jianheng Zhang Qiao Liu Yuanliang Duan Qing He Kefeng Yu Hongsheng Bi Chunlei Fan Peimin He | 2019 | Acta Oceanologica Sinica2019，38，10： | 4 |
| 5 | Global existence of smooth solutions to two-dimensional compressible isentropic Euler equations for Chaplygin gases显示文摘In this paper we investigate the two-dimensional compressible isentropic Euler equations for Chaplygin gases. Under the assumption that the initial data is close to a constant state and the vorticity of the initial velocity vanishes, we prove the global existence of the smooth solution to the Cauchy problem for twodimensional flow of Chaplygin gases. | KONG DeXing 1 , LIU KeFeng 2 & WANG YuZhu 3, 1 Department of Mathematics, Zhejiang University, Hangzhou 310027, China 2 Department of Mathematics, University of California at Los Angeles, CA 90095, USA 3 Department of Mathematics, Shanghai Jiao Tong University, Shanghai 200248, China | 2010 | Science China Mathematics2010，53，3： | 4 |
| 6 | Sensitivity Experiments on the Poleward Shift of Tropical Cyclones over the Western North Pacific under Warming Ocean Conditions显示文摘Recent studies found that in the context of global warming, the observed tropical cyclones(TCs) exhibit significant poleward migration trend in terms of the mean latitude where TCs reach their lifetime-maximum intensity in the western North Pacific(WNP). This poleward migration of TC tracks can be attributed to not only anthropogenic forcing(e.g., continuous increase of sea surface temperature(SST)), but also impacts of other factors(e.g., natural variability). In the present study, to eliminate the impacts of other factors and thus focus on the impact of unvaried SST on climatological WNP TC tracks, the mesoscale Weather Research and Forecasting(WRF) model is used to conduct a suite of idealized sensitivity experiments with increased SST. Comparisons among the results of these experiments show the possible changes in climatological TC track, TC track density, and types of TC track in the context of SST increase. The results demonstrate that under the warmer SST conditions, the climatological mean TC track systematically shifts poleward significantly in the WNP, which is consistent with the previous studies. Meanwhile, the ocean warming also leads to the decreased(increased) destructive potential of TCs in low(middle) latitudes, and thus northward migration of the region where TCs have the largest impact. Further results imply the possibility that under the ocean warming, the percentage of TCs with westward/northwestward tracks decreases/increases distinctly. | Yixuan SHEN Yuan SUN Zhong ZHONG Kefeng LIU Jian SHI | 2018 | Journal of Meteorological Research2018，32，4： | 3 |
| 7 | Risk Assessment of Marine Environments Along the South China Sea and North Indian Ocean on the Basis of a Weighted Bayesian Network显示文摘Marine environments have a considerable influence on the construction of the Chinese 21st Century Maritime Silk Road.Thus,an objective and quantitative risk assessment of marine environments has become a key problem that must be solved urgently.To deal with the uncertainty in marine environmental risks caused by complex factors and fuzzy mechanisms,a new assessment technique based on a weighted Bayesian network(BN)is proposed.Through risk factor analysis,node selection,structure construc-tion,and parameter learning,we apply the proposed weighted BN-based assessment model for the risk assessment and zonation of marine environments along the Maritime Silk Road.Results show that the model effectively fuses multisource and uncertain envi-ronmental information and provides reasonable risk assessment results,thereby offering technical support for risk prevention and disaster mitigation along the Maritime Silk Road. | LI Ming ZHANG Ren LIU Kefeng | 2021 | Journal of Ocean University of China2021，20，3： | 3 |
| 8 | Efficacy of rigosertib, a small molecular RAS signaling disrupter for the treatment of KRAS-mutant colorectal cancer显示文摘Objective:Mutant KRAS,the principal isoform of RAS,plays a pivotal role in the oncogenesis of colorectal cancer by constitutively activating the RAF/MEK/ERK and PI3K/AKT pathways.Effective targeted therapies are urgently needed.We investigated whether rigosertib,a benzyl styryl sulfone RAS signaling disruptor,could selectively kill KRAS-mutant colorectal cancer cells.Methods:CCK-8 was used to determine the cell viability.Patient-derived tumor and cancer cell xenograft models were used to detect the inhibitory efficacy of rigosertib.Flow cytometry was used to evaluate the apoptosis and cell cycle progression.Apoptosis and cell cycle arrest markers were detected by Western blot.DCFH-DA was used to determine the reactive oxygen species.Immunohistochemistry staining and Western blot were performed to characterize RAS signaling markers in colorectal cancer tissues and cells.Results:Rigosertib(RGS)exhibited a cytotoxic effect against colorectal cancer cells,which was greater in KRAS-mutant cells.Furthermore,RGS induced mitotic arrest and oxidative stress-dependent apoptosis in KRAS-mutant DLD1 and HCT116 cells.Besides,RGS disrupted RAS signaling,and the inhibition of RAS/MEK/ERK was independent of cellular oxidative stress.Using patient-derived xenograft models,the response and tumor inhibition of RGS were significantly higher in the KRAS-mutant subgroup,while p-MEK,p-ERK,and p-AKT levels of RGS-treated tumors were significantly decreased.Finally,in a KRAS-mutant,chemotherapy-resistant patient-derived xenograft model,RGS showed a stronger therapeutic effect than the combination standard therapy involving fluoropyrimidine+oxaliplatin/irinotecan+bevacizumab.Conclusions:These data showed that targeting RAS signaling using RGS could be a therapeutic treatment for KRAS-mutant colorectal cancer patients. | Xinyi Zhou Qian Xiao Dongliang Fu Haochen Zhang Yang Tang Jinjie He Yeting Hu Xiangxing Kong Fei Teng Xiangrui Liu Ying Yuan Kefeng Ding | 2022 | Cancer Biology & Medicine2022，19，2： | 2 |
| 9 | Time-periodic solutions of the Einstein's field equations Ⅲ:physical singularities显示文摘In this paper we construct a new time-periodic solution of the vacuum Einstein's field equations, this solution possesses physical singularities, i.e., the norm of the solution's Riemann curvature tensor takes the infinity at some points. We show that this solution is intrinsically time-periodic and describes a time-periodic universe with the 'time-periodic physical singularity'. By calculating the Weyl scalars of this solution, we investigate new physical phenomena and analyze new singularities for this universal model. | KONG DeXing LIU KeFeng SHEN Ming | 2011 | Science China Mathematics2011，54，1： | 2 |
| 10 | A note on modular forms and generalized anomaly cancellation formulas显示文摘By studying modular invariance properties of some characteristic forms,we prove some new anomaly cancellation formulas which generalize the Han-Zhang and Han-Liu-Zhang anomaly cancellation formulas. | LIU KeFeng WANG Yong | 2013 | Science China Mathematics2013，56，1： | 2 |
| 11 | New Half-sandwich Zirconium(Ⅳ) Complexes Containing Salicylaldimine Ligands: Synthesis, Characterizations and Catalytic Properties显示文摘 | LIU Kefeng YAO Gang WU Wenlei GAO Bo | 2014 | Chemical Research in Chinese Universities2014，30，5： | 2 |
| 12 | A geometric heat flow for vector fields显示文摘We introduce and study a geometric heat flow to find Killing vector fields on closed Riemannian manifolds with positive sectional curvature. We study its various properties, prove the global existence of the solution to this flow, discuss its convergence and possible applications, and its relation to the Navier-Stokes equations on manifolds and Kazdan-Warner-Bourguignon-Ezin identity for conformal Killing vector fields. We also provide two new criterions on the existence of Killing vector fields. A similar flow to finding holomorphic vector fields on K¨ahler manifolds will be studied by Li and Liu(2014). | LI Yi LIU KeFeng | 2015 | Science China Mathematics2015，58，4： | 2 |
| 13 | Impact of Initial Storm Intensity and Size on the Simulation of Tropical Cyclone Track and Western Pacific Subtropical High Extent显示文摘Typhoon Megi, the 13 th typhoon of the 2010 typhoon season, was selected for case study by utilizing the Weather Research and Forecasting(WRF) model. Twelve sensitivity experiments with various initial tropical cyclone(TC) intensities and sizes were conducted to investigate their impacts on the simulation of typhoon track. Interaction between TC and the western Pacific subtropical high(WPSH) was also analyzed to explore the mechanism for the impact on TC track of the initial TC intensity and size. Numerical results indicate that the simulated TC size and TC track are sensitive to initial TC intensity and size. Stronger initial TC intensity and larger initial TC size often lead to larger simulated TC size and make TC turn northward earlier. Further analysis suggests that, with the increase of initial TC intensity and size, more air mass enters into the TC region, which subsequently reduces the extent of WPSH.As a result, the steering flow changes significantly and eventually causes the TC to turn northward earlier. The present study confirms that the initial TC intensity and size have certain influences on the TC track simulation, which demonstrates the importance of accurate initial condition for successful simulation of the TC intensity and TC track.Moreover, it also deepens our understanding of the interaction between TC and WPSH, provides helpful clues for the TC track change study, and discusses the future directions for improvement of TC track forecast. | Yuxing WANG Yuan SUN Qianfeng LIAO Zhong ZHONG Yijia HU Kefeng LIU | 2017 | Journal of Meteorological Research2017，31，5： | 2 |
| 14 | Wave character of metrics and hyperbolic geometric flow显示文摘 | Kong Dexing Liu Kefeng | 2007 | J Math Phys2007，48，： | 1 |
| 15 | Realumination of MCM-22 Zeolite and Its Application 显示文摘 | Liu Kefeng Liu Shenglin Xie Sujuan | 2014 | CatalLett2014，144，7： | 1 |
| 16 | Topographic Mapping of Offshore Sandbank Tidal Flats Using the Waterline Detection Method: A Case Study on the Dongsha Sandbank of Jiangsu Radial Tidal Sand Ridges, China显示文摘 | Yongxue Liu Manchun Li Liang Cheng Feixue Li Kefeng Chen | 2012 | Marine Geodesy2012，，4： | 1 |
| 17 | Microwave enhanced synthesis of MOF-5 and its CO 2 capture ability at moderate temperatures across multiple capture and release cycles显示文摘 | Chun-Mei Lu Jun Liu Kefeng Xiao Andrew T. Harris | 2009 | Chemical Engineering Journal2009，，2： | 1 |
| 18 | RCS analysis and reduction for lossy dihedral corner reflector显示文摘 | T Griesser C Abalanis Kefeng LIU | 1989 | Proceedings of the IEEE1989，77，5： | 1 |
| 19 | Effect of cofeeding n-butane with methanol on aromatization per- formance and coke formation over a Zn loaded ZSM-5/ ZSM-11 zeolite 显示文摘 | SONG Chao LIU Kefeng ZHANG Dazhou | 2014 | Applied Catalysis A: General2014，470，2： | 1 |
| 20 | An Improved LOT Model for Image Restoration显示文摘 | Fangfang Dong Zhen Liu Dexing Kong Kefeng Liu | 2009 | Journal of Mathematical Imaging and Vision2009，，1： | 1 |
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