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Agricultural Sciences in China 2009年第4期8卷 431-440页

作者： wang xiao-shan HAN Jian-guo Institute of Grassland Science China Agricultural University Beijing 100193 P.R. China College of Animal Science and Technology Yangzhou University Yangzhou 225009 P.R.China

The plants of two elfalfa （Medicago sativa L.） cultivars differing in salt tolerance were subjected to three salt treatments, 70, 140, and 210 mM NaCl for 7 days. Root, shoot, and leaf growths were inhibited by increased salt treatments in both cultivars, and at 140 and 210 mM salt treatments, Zhongmu 1 had significantly higher root, shoot, and leaf dry weights per plant than Deft. The malondialdehyde （MDA） accumulation in Deft was considerably greater than in Zhongmu 1, indicating a higher degree of lipid peroxidation at 140 and 210 mM salt treatments. The changes in the activity and active isoforms of antioxidant enzymes such as superoxide dismutase （SOD, EC 1.***.1.1）, catalase （CAT, EC 1.***.1.6）, peroxidase （POD, EC 1.***.1.7）, and ascorbate peroxidase （APOX, EC 1.11,1.11）, accumulation of free proline, and rate of lipid peroxidation in leaves of two alfalfa cultivars were also investigated. After stress, the activity and active isoforms of antioxidative enzymes were altered and the extent of alteration varied between the cultivar Deft and Zhongmu 1. The proline accumulation in Deft was considerably greater than in Zhongmu 1 at 210 mM salt treatment. This indicated that proline accumulation may be the result, instead of the cause, of salt tolerance.

关键词： antioxidative enzymes proline Medicago sativa L. lipid peroxidation salt stress

Degradation of chlorpyrifos alone and in combination with chlorothalonil and their effects on soil microbial populations

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Journal of Environmental Sciences 2008年第4期20卷 464-469页

作者： CHU xiaoqiang FANG Hua PAN Xuedong wang xiao shan Min FENG Bo YU Yunlong Department of Plant Protection College of Agriculture and Biotechnology Zhejiang University Hangzhou 310029 China

In practice, pesticides are usually applied simultaneously or one after another for crop protection, and this type of pesticide application often leads to a combined contamination of pesticide residues in the soil environment. A laboratory study was conducted to investigate the influence of chlorothalonil on chlorpyrifos degradation and its effects on soil bacterial, fungal, and actinomycete populations. Under the experimental conditions here, the half-lives of chlorpyrifos alone, and in combination with chlorothalonil, at the recommended and double dosages, were measured to be 3.24, 2.77, and 2.63 d, respectively. Chlorpyrifos degradation was not significantly altered by its combination with chlorothalonil. However, the inhibitory effect of chlorpyrifos on soil microorganisms was increased by its combination with chlorothalonil, and the increase was related to the levels of chlorothalonil added. Compared to those in the controls, the populations of bacteria, fungi, and actinomycetes were significantly reduced by 44.1%, 61.1%, and 72.8%, respectively, on the first day after treatment （DAT） by chlorpyrifos alone. With the addition of chlorothalonil, the inhibition was increased to 55.2%, 79.3%, and 85,8% at the recommended dosage, and 86.0%, 94.1%, and 90.8% at the double dosage, at one DAT, respectively. The results suggested that combined effects should be taken into account to assess the actual impacts of pesticide applications.

关键词： pesticide soil microorganism chlorpyrifos chlorothalonil combination

Quadratic nonconforming finite element method for 3D Stokes equations on cuboid meshes

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Applied Mathematics(A Journal of Chinese Universities) 2016年第1期31卷 21-36页

作者： ZHOU Xin-chen MENG Zhao-liang wang xiao-shan LUO Zhong-xuan School of Mathematical Sciences Dalian University of TechnologyDalian 116024China School of Software Dalian University of TechnologyDalian 116024China

In this paper, the quadratic nonconforming brick element （MSLK element） intro- duced in [10] is used for the 3D Stokes equations. The instability for the mixed element pair MSLK-P1 is analyzed, where the vector-valued MSLK element approximates the velocity and the piecewise P1 element approximates the pressure. As a cure, we adopt the piecewise P1 macroelement to discretize the pressure instead of the standard piecewise P1 element on cuboid meshes. This new pair is stable and the optimal error estimate is achieved. Numerical examples verify our theoretical analysis.

关键词： Stokes equations nonconforming finite element macroelement stability.

Effects of neutral salt and alkali on ion distributions in the roots,shoots,and leaves of two alfalfa cultivars with differing degrees of salt tolerance

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Journal of Integrative Agriculture 2017年第8期16卷 1800-1807页

作者： wang xiao-shan REN Hai-long WEI Zen-wu wang Yun-wen REN Wei-bo Department of Grassland Science College of Animal Science and TechnologyYangzhou UniversityYangzhou 225009P.R.China Institute of Grassland Research Chinese Academy of Agricultural SciencesHohhot 010000P.R.China Department of Grassland Science College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193P.R.China

The effects of neutral salt and alkali on the ion distribution were investigated in two alfalfa （Medicago sativa L.） cultivars, including Zhongmu 1, a high salt-tolerant cultivar, and Algonquin, a low salt-tolerant cultivar. The alkali stress expressed more serious growth inhibition than the neutral salt stress at the same Na＋ concentration. Compared with Algonquin, Zhongmu 1 did not exhibit a higher alkali tolerance under the Na2CO3-NaHCO3 treatment with the low Na＋ concentration （50 mmol L-l）. The alkali increased the accumulation of Na＋, Ca2＋, and Mg2＋ in the root and changed the Ca2＋ and Mg2＋ balance in the entire alfalfa plant. The salt and alkali stresses decreased the K＋ and Fe3＋ contents of the roots and leaves, the root Mn2＋ content, and the shoot Zn2＋ content, but they increased the Fe3＋ accumulation of the shoots, the shoot and leaf Cu2＋ contents, and the leaf Zn2＋ content in both alfalfa cultivars. Based on the results obtained under the conditions of this experiment, we found that the salt and alkali stresses reduced the plant growth in both alfalfa cultivars, while the alkali caused a stronger stress than the neutral salt in alfalfa. Thus, we conclude that under hydroponic conditions, the deleterious effects of the alkali on plants are due to the distribution change of some trophic ion balance in the roots, shoots, and leaves of the plants by causing of Na＋, CO3^2-, and/or HCO3- stresses.

关键词： alfalfa ion distribution neutral salts alkali stress

Synthesis and biological evaluation of nitric oxide-releasing matrine derivatives as anticancer agents

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Chinese Chemical Letters 2010年第4期21卷 381-384页

作者： He, Li Qin Liu, Jing Yin, Deng Ke Zhang, Yi Hua wang, xiao shan China Pharmaceut Univ Ctr Drug Discovery Nanjing 210009 Peoples R China Anhui Univ Tradit Chinese Med Anhui Key Lab Modernized Chinese Mat Med Hefei 230031 Anhui Peoples R China

A series of furoxan-based nitric oxide-releasing matrine derivatives(10a-f) were *** biological evaluation showed that compounds 10a,10b,10e and 10f had stronger cytotoxic activities than 5-fluorouracil against human ... 详细信息

关键词： Matrine Furoxan Anti-tumor activity HepG2

The Angular Distribution of Optical Emission Spectroscopy from a Femtosecond Laser Filament in Air

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Chinese Physics Letters 2013年第4期30卷 126-128页

作者： SUN Shao-Hua LIU xiao-Liang LIU Zuo-Ye wang xiao-shan DING Peng-Ji LIU Qing-Cao GUO Ze-Qin HU Bi-Tao School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000

Spatial characterization of a femtosecond laser pulse filament in air is experimentally investigated by detecting the optical emission spectroscopy of laser-induced *** is shown that the intensity of N I spectral lines have different angular distributions along the filament and the calculated results fit the experimental data *** obtained degree of atomic polarization along the filament strongly depends on the electron density and the propagation characteristic of the femtosecond laser pulse.

关键词： polarization Femto laser

Study on the crustal stress fi eld of the Tengchong volcanic area using composite focal mechanism method

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Applied Geophysics 2021年第2期18卷 238-251,274页

作者： Sheng Shu-zhong Wan Yong-ge Jiang Chang-sheng wang xiao-shan Liang shan-shan xiao Gen-ru Hu xiao-hui School of Geophysics and Measurement-control Technology East China University of TechnologyNanchang 330013China Institute of Disaster Prevention Sanhe 065201HebeiChina Hebei Key Laboratory of Earthquake Dynamics Sanhe 065201HebeiChina Institute of Geophysics China Earthquake AdministrationBeijing 100081China Earthquake Administration of Hebei Province Shijiazhuang 050021China China Earthquake Networks Center Beijing 100045China School of Geomatics East China University of TechnologyNanchang 330013China

We calculated the crustal stress field using the composite focal mechanism method based on the P-wave initial motion polarity data of the Tengchong volcanic area from January 2011 to April 2019 obtained from the Bulletin of Seismological Observations of Chinese *** magnitude range of earthquakes used in this study is 0–4,and their magnitudes are mainly approximately *** investigate the infl uence of the source location on the stress fi eld and obtain reliable stress fi elds of the study area,we applied the double-diff erence algorithm to relocate the seismic events,obtaining more accurate and reliable relative positions of seismic events with a clearer seismic *** the basis of relocation results,the study on the stress fi eld along the fault zone was conducted,and the infl uence of seismic event position on the stress fi eld was *** show that,fi rst,the current stress regime in the shallow crust of the Tengchong volcanic area is strike-slip faulting,the orientation of the principal compressive stress axis is NE–SW,the orientation of the principal extension stress axis is SE–NW,the principal compressive and extension stress axes are nearly horizontal,and the dip angle of intermediate principal stress axis is relatively *** reflects that the volcanic and seismic activities in the Tengchong volcanic area are mainly controlled by the collision and squeezing eff ect of the Indian–Eurasian *** also refl ects that the current tensile action caused by deep magma activity has little infl uence on the shallow crustal stress ***,the stress field along fault zones reveals that there exist local stress fi elds,such as the thrust stress regime at the strike-slip fault terminal area,which is consistent with the compressional area at the intersection of conjugate strike-slip faults indicated by previous ***,the stress fi eld results are consistent,regardless of using the original location in the bulletin or the relocated loc

关键词： Tengchong volcanic area Composite focal mechanism Stress fi eld Double-diff erence location Conjugate Fault

Treatment efficacy of radiof requency ablation of 338 patients with hepatic malignant tumor and the relevant complications

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World Journal of Gastroenterology 2005年第40期11卷 6395-6401页

作者： Min-Hua Chen Wei Yang Kun Yan Wen Gao Ying Dai Yan-Bin wang xiao-Peng Zhang shan-shan Yin Departmentof Ultrasound Peking University School of Oncology 52 Fu-cheng Rd Haidian District Beijing 100036 China

AIM： To investigate the treatment efficacy of radiofrequency ablation （RFA） of hepatic malignant tumor and the relevant complications. METHODS： A total of 338 patients with 763 hepatic tumors underwent ultrasound-guided RFA （565 procedures）. There were 204 cases of hepatic cellular carcinoma （HCC） with 430 tumors, the mean largest diameter was 4.0 cm. Of them, 48 patients （23.5%） were in stages Ⅰ-Ⅱ （UICC Systems） and 156 （76.5%） in stages Ⅲ-Ⅳ There were 134 cases of metastatic liver carcinoma （MLC）, with 333 metastases in the liver, the mean diameter was 4.1 cm, the liver metastases of 96 patients （71.6%） came from gastrointestinal tract. Ninety-three percent of the 338 patients were treated using the relatively standard protocol. Crucial attention must be paid to monitor the abnormal changes in ultrasound images as well as the vital signs of the patients to find the possible hemorrhage and peripheral structures injury in time. The tumors were considered as ablated completely, if no viability was found on enhanced CT within 24 h or at 1 mo after RFA. These patients were followed up for 3-57 too. RESULTS： The ablation success rate was 93.3% （401/430 tumors） for HCC and was 96.7% （322/333 tumors） for MLC. The local recurrence rate for HCC and MLC was 7.9% （34/430 tumors） and 10.5% （351333 tumors）, respectively. A total of 137 patients （40.5%） underwent 2-11 times of repeated ablations because of tumor recurrence or metastasis. The 1st, 2nd, and 3rd year survival rate was 84.6%, 66.6%, and 63.1%, respectively; the survival rate from 48 patients of I-II stage HCC was 93.7%, 80.4%, and 80.4%, respectively. The major complication rate in this study was 2.5% （14 of 565 procedures）, which consisted of 5 hemorrhages, i colon perforation, 5 injuries of adjacent structures, 2 bile leakages, and 1 skin burn. CONCLUSION： RFA, as a minimally invasive local treatment, has become an effective and relatively safe alternativefor the patients of hepatic malignant tumor, even of advanc

关键词： Radiofrequency ablation Liver neoplasms Survival Complication Ultrasonography

Comparison of Near Infrared Spectroscopy Models for Determining Protein and Amylose Contents Between Calibration Samples of Recombinant Inbred Lines and Conventional Varieties of Rice

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Agricultural Sciences in China 2007年第8期6卷 941-948页

作者： ZHANG Hong-jiang WU Jin-hong LUO Li-jun LI Ying YANG Hua YU Xin-qiao wang xiao-shan CHEN Liang MEI Han-wei shanghai Agrobiological Gene Center Shanghai 201106 P.R.China

The near infrared spectra of 178 recombinant inbred lines （RILs） from the cross of Ⅱ-32B/Yuezaoxian 6 （YZX6） and 511 varieties in rice were acquired. A total of 80 RILs and 96 cultivars were selected as modeling samples by comparing the spectra similarity primarily. Three partial least square （PLS） regression models were developed, based on the RILs （RIL-model）, the varieties （Var-model） and their mixture （Mix-model）, for protein content （PC） and amylose content （AC）, respectively. Cross validation and outer prediction showed that the models were largely influenced by the range and distribution of modeling samples. The regression model of PC based on the cultivars and the model of AC based on RILs had higher coefficient of determination （r^2 ≥ 0.9） and lower root mean square error of cross validation （RMSECVs）. The disadvantages of RIL samples for PC model and variety samples for AC model were probably caused by the narrow range of variance. Aberrant predictions were obtained for outer sample with PC or AC outside the range or within the distribution gap of modeling samples. The Mix-models gave more reliable prediction as the distribution of RIL and variety modeling samples were complementary to each other.

关键词： Oryza sativa L. protein content amylose content NIR spectroscopy RILs varieties

High serum interleukin-6 level is associated with increased risk of delirium in elderly patients after noncardiac surgery： a prospective cohort study

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Chinese Medical Journal 2013年第19期126卷 3621-3627页

作者： LIU Pei LI Ya-wei wang xiao-shan ZOU Xi ZHANG Da-zhi wang Dong-xin LI Shi-zhong Department of Anesthesiology and Surgical Intensive Care PekingUniversity First Hospital Beijing 100034 China Departmen~ of ~nesthesiology Civil Aviation General HospitalBeijing 100025 China Department of Anesthesiology Beijing Jishuitan Hospital Beijing100035 China

Background The relationship between inflammation and delirium remains to be *** purposes of this study were to investigate the association between serum interleukin-6 levels and the occurrence of delirium in elderly patients after major noncardiac *** A total of 338 elderly patients （60 years of age and over） undergoing major noncardiac surgery were *** samples were obtained before anesthesia and in the first postoperative morning and serum interleukin-6 concentrations were *** was assessed twice daily by the confusion assessment method for the Intensive Care Unit during the first three postoperative *** analyses were performed to assess the relationship between the serum IL-6 level and the occurrence of postoperative *** Postoperative delirium occurred in 14.8% （50 of 338） of *** serum interleukin-6 levelsafter surgery were significantly associated with increased risk of the occurrence of postoperative delirium （hazard ratio 1.514,95% confidence interval 1.155-1.985,P=0.003）.Other independent predictors of delirium included increasing age,poor preoperative New York Heart Association classification,low preoperative Mini-Mental State Examination score,and high total postoperative Visual Analogue Scale pain *** who developed delirium had a prolonged hospital stay after *** Delirium is a frequent complication in elderly patients after noncardiac *** serum interleukin-6 level after surgery is associated with increased risk of the occurrence of postoperative delirium.

关键词： elderly surgical procedures, operative interleukin-6 delirium postoperative complications