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1Erratum: Effects of Periodically Inhomogeneous Birefringence on Dark-Bright Vector Soliton Propagation and Interaction [Chin. Phys. Lett. 24 (2007) 462]显示文摘李宏 D. N. Wang 2007Chinese Physics Letters2007,24,3:99
2Potential of Industrial Byproducts in Ameliorating Acidity and Aluminum Toxicity of Soils Under Tea Plantation显示文摘It is imperative to choose some low cost,available and effective ameliorants to correct soil acidity in southern China for sustainable agriculture.The present investigation dealt with the possible role of industrial byproducts,i.e.,coal fly ash(CFA),alkaline slag(AS),red mud(RM) and phosphogypsum(PG) in correcting acidity and aluminum(Al) toxicity of soils under tea plantation using an indoor incubation experiment.Results indicated that CFA,AS and RM increased soil pH,while PG decreased the pHs of an Ultisol and an Alfisol.The increment of soil pH followed the order of RM > AS > CFA.All the industrial byproducts invariably decreased exchangeable Al and hence increased exchangeable Ca,Mg,K and Na and effective cation exchange capacity.RM,AS and lime decreased total soluble Al,exchangeable Al and organically bound Al.Formation and retention of hydroxyl-Al polymers were the principal mechanism through which Al phytotoxicity was alleviated by application of these amendments.In addition,the heavy metal contents in the four industrial byproducts constituted a limited environmental hazard in a short time at the rates normally used in agriculture.Therefore,the short-term use of the byproducts,especially AS and RM,as amendments for soil acidity and Al toxicity in acid soils may be a potential alternative to the traditional use of mined gypsum and lime.LI Jiu-Yu WANG Ning XU Ren-Kou D. TIWARI 2010Pedosphere2010,20,5:39
3National Scale Analysis of Soil Organic Carbon Storage in China Based on Chinese Soil Taxonomy显示文摘Patterns of soil organic carbon (SOC) storage and density in various soil types or locations are the foundation for examining the role of soil in the global carbon cycle. An assessment of SOC storage and density patterns in China based on soil types as defined by Chinese Soil Taxonomy (CST) and the recently compiled digital 1:1000000 Soil Database of China was conducted to generate a rigorous database for the future study of SOC storage. First, SOC densities of 7 292 soil profiles were calculated and linked by soil type to polygons of a digital soil map using geographic information system resulting in a 1:1 000 000 SOC density distribution map of China. Further results showed that soils in China covered 9 281×103 km2 with a total SOC storage of 89.14 Gt and a mean SOC density 96.0 t ha-1. Among the 14 CST orders, Cambosols and Argosols constituted high percentage of China's total SOC storage, while Andosols, Vertosols, and Spodsols had a low percentage. As for SOC density, Histosols were the highest, while Primosols were the lowest. Specific patterns of SOC storage of various soil types at the CST suborder, group, and subgroup levels were also described. Results obtained from the study of SOC storage and density of all CST soil types would be not only useful for international comparative research, but also for more accurately estimating and monitoring of changes of SOC storage in China.YU Dong-Sheng SHI Xue-Zheng WANG Hong-Jie SUN Wei-Xia E. D. WARNER LIU Qing-Hua 2007Pedosphere2007,17,1:33
4Root Physiological and Morphological Characteristics of Two Rice Cultivars with Different Nitrogen-Use Efficiency显示文摘The variation in nitrogen (N) uptake by rice has been widely studied but differences in rice root morphology that may contribute to this variation are not completely understood. Field and greenhouse experiments were carried out to study N accumulation, root dry weights, total root lengths, root surface areas, and root bleeding rates of two rice cultivars, Elio with low N-use efficiency and Nanguang with high N-use efficiency. Low (1 mmol N L-1) and high (5 mmol N L-1) N applications were established in the greenhouse experiment, and the N rates were 0, 120, and 240 kg ha-1 in the field experiments at Jiangning and Jiangpu farms, Nanjing, China. The results showed that the N accumulation, root dry weight, total root length, and root surface area increased with an increase in N application. At the heading stage, N accumulation in the shoots and roots of Nanguang was greater than that of Elio in the field experiments and that of Elio at 5 mmol N L-1 in the greenhouse experiment. After the heading stage, N accumulation was higher for Nanguang at both 1 and 5 mmol N L-1 in the greenhouse experiment. The total root length and root surface area were significantly different between the two cultivars. Over the range of the fertilizer application rates, the root lengths of Nanguang at Jiangning Farm were 49%-61% greater at booting and 26%-39% greater at heading than those of Elio, and at Jiangpu Farm they were 22%-42% and 26%-38% greater, respectively. Nanguang had a greater root bleeding rate than Elio. It was concluded that the N-use efficiency of the two rice cultivars studied depended to a great extent on the root morphological parameters and root physiological characteristics at different growth stages.FAN Jian-Bo ZHANG Ya-Li D. TURNER DUAN Yin-Hua WANG Dong-Sheng SHEN Qi-Rong 2010Pedosphere2010,20,4:33
5NUMERICAL SIMULATION OF ROUND TO OVAL ROLLING PROCESS显示文摘Three dimensional thermal-mechanical coupled elasto-plastic FEM has been used for simulation of round to oval single pass rolling. The analysis was conducted using MARC/AUTOFORCE1. 2 code. The material is assumed to be elasto-plastic and it obey the Von Mises yield criterion and Prandtl- Reuss rule. Deformation of the workpiece is simulated in a step-by-step manner,updating the coordinates of material points and the property after each step, so that both nonsteady-state and stendy-state deformation can be simulated. The heat transfter between the workpiece, the rolls, and enviroment and the heat generation due to plastic work and friction force, are considered in the analys- is.Predicted the deformation shape of the workpiece, distributions of strains, stresses, strain rates and temperatures, roll-separating force and roll torque are presented.Y. W. Wang, Y. L. King, D. H. Yuan, S. G. Liu and Z. Y. Yu 1 ) University of Science and Technology Beijing, Beijing 100083, China 2) Daye Special Steel Co., Huangshi 435001, China 2000Acta Metallurgica Sinica(English Letters)2000,13,2:27
6Single-cell RNA-seq uncovers dynamic processes and critical regulators in mouse spermatogenesis显示文摘Yao Chen Yuxuan Zheng Yun Gao Zhen Lin Suming Yang Tongtong Wang Qiu Wang Nannan Xie Rong Hua Mingxi Liu Jiahao Sha Michael D. Griswold Jinsong Li Fuchou Tang Ming-Han Tong 2018Cell Research2018,28,9:26
7EFFECTS OF SPECIFIED BLANK SIZE ON BODY WRINKLING DURING HYDRODYNAMIC DEEP DRAWING OF TAPERED RECTANGULAR BOX显示文摘In this paper, the forming features of tapered rectangular box during hydrodynamic deep drawing are studied by means of FEM.The effect rules of square blank corner corner amount on body wrinkling are recognized and corresponding methods are discussed. At last, the results of FEM are verified by experi- ment.L. H. Lang, D. C. Kang, S. H. Zhang, Z. R. Wang, S. J. Yuan, K. B. Nielsen and J. Dancket 1) Department of Materials Engineering, Harbin Institute of Technology, Harbin 150001, China 2) Aalberg University, Denmark 2000Acta Metallurgica Sinica(English Letters)2000,13,2:21
8Ozone sensitivity analysis with the MM5-CMAQ modeling system for Shanghai显示文摘Ozone has become one of the most important air pollution issues around the world. This article applied both O 3 /(NOy-NOx) and H 2 O 2 /HNO 3 indicators to analyze the ozone sensitivity in urban and rural areas of Shanghai, with implementation of the MM5-CMAQ modeling system in July, 2007. The meteorological parameters were obtained by using the MM5 model. A regional emission inventory with spatial and temporal allocation based on the statistical data has been developed to provide input emission data to the MM5-CMAQ modeling system. Results showed that the ozone concentrations in Shanghai show clear regional differences. The ozone concentration in rural areas was much higher than that in the urban area. Two indicators showed that ozone was more sensitive to VOCs in urban areas, while it tended to be NOx sensitive in rural areas of Shanghai.Li Li Changhong Chen Cheng Huang Haiying Huang Gangfeng Zhang Yangjun Wang Minghua Chen Hongli Wang Yiran Chen D. G. Streets Jiamo Fu 2011Journal of Environmental Sciences2011,23,7:18
9Scale Effect of Climate and Soil Texture on Soil Organic Carbon in the Uplands of Northeast China显示文摘Understanding how spatial scale inffuences commonly-observed effiects of climate and soil texture on soil organic carbon (SOC) storage is important for accurately estimating the SOC pool at different scales. The relationships among climate factors, soil texture and SOC density at the regional, provincial, city, and county scales were evaluated at both the soil surface (0-20 cm) and throughout the soil profile (0-100 cm) in the Northeast China uplands. We examined 1022 profiles obtained from the Second National Soil Survey of China. The results indicated that the relationships between climate factors and SOC density generally weakened with decreasing spatial scale. The provincial scale was optimal to assess the relationship between climate factors and SOC density because regional differences among provinces were covered up at the regional scale. However, the relationship between soil texture and SOC density had no obvious trend with increasing scale and changed with temperature. There were great differences in the impacts of climate factors and soil texture on SOC density at different scales. Climate factors had a larger effect on SOC density than soil texture at the regional scale. Similar trends were seen in Heilongjiang and eastern Inner Mongolia at the provincial scale. But, soil texture had a greater effect on SOC density compared with climate factors in Jilin and Liaoning. At the city and county scales, the inffuence of soil texture on SOC density was more important than climate factors.WANG Dan-Dan SHI Xue-Zheng WANG Hong-Jie D. C. WEINDORF YU Dong-Sheng SUN Wei-Xia REN Hong-Yan ZHAO Yong-Cun 2010Pedosphere2010,20,4:17
10Scenario Analysis of Tillage, Residue and Fertilization Management Effects on Soil Organic Carbon Dynamics显示文摘Based on data from 10-year field experiments on residue/fertilizer management in the dryland farming region of northern China, Century model was used to simulate the site-specific ecosystem dynamics through adjustment of the model’s parameters, and the applicability of the model to propose soil organic carbon (SOC) management temporally and spatially, in cases such as of tillage/residue/fertilization management options, was identified via scenario analysis. Results between simulations and actual measurements were in close agreement when appropriate applications of stover, manure and inorganic fertilizer were combined. Simulations of extreme C/N ratios with added organic materials tended to underestimate the measured effects. Scenarios of changed tillage methods, residue practices and fertilization options showed potential to maintain and enhance SOC in the long run, while increasing inorganic N slowed down the SOC turnover rate but did not create a net C sink without any organic C input. The Century model simulation showed a good relationship between annual C inputs to the soil and the rate of C sequestration in the top 20 cm layer and provided quantitative estimations of changes in parameters crucial for sustainable land use and management. Conservation tillage practices for sustainable land use should be integrated with residue management and appreciable organic and inorganic fertilizer application, adapted according to the local residue resource, soil fertility and production conditions. At least 50% residue return into the soil was needed annually for maintenance of SOC balance, and manure amendment was important for enhancement of SOC in small crop-livestock systems in which crop residue land application was limited.WANG Xiao-Bin CAI Dian-Xiong W. B. HOOGMOED O. OENEMA U. D. PERDOK 2005Pedosphere2005,15,4:14
11Voluntary exercise-induced neurogenesis in the postischemic dentate gyrus is associated with spatial memory recovery from stroke显示文摘Luo, C. X. Jiang, J. Zhou, Q. G. Zhu, X. J. Wang, W. Zhang, Z. J. Han, X. Zhu, D. Y. 2007南京医科大学学报(自然科学版)2007,27,10:13
12The Measurement of ^(41)Ca and Its Application for Cell Messenger显示文摘Ca is an important element in human body. Many diseases relate with Ca in organizations and cells.41Ca (T1/2=1.04×105 a, pure electron capture with emission or Auger electrons and X-rays) is an idealtracer to understand of the mechanism of the disease. The measurement of 41Ca with AMS has been usedfor study of long-term bone resorption, bone resorption in a human, Ca uptake and deposition in heardtissue and skeletal Ca metabolism. Ca2+ in cytoplasm of human cell as a cell messenger plays anS. JIANG, M. HE, K. DONG, D. YUE, S. WU, G.XU, J.QIN, Q.YOU, Y.ZHENG, Y.GUAN, Q. LIANG, X. ZHAO, Q. WANG S. LIU(Department of Nuclear Physics, C1AE, Beijing 102413, China Department of biology, Beijing Normal University, Beijing 100875, China Department of Physics, Guangxi University, Nanning 530004, China College of Public Health, Beijing University, Beijing 100083, China College of Applied Arts and Science, Beijing Union University, Beijing 100083, China) 2002Annual Report of China Institute of Atomic Energy2002,,0:12
13Two-Body Abrasive Wear of the Surfaces of Pangolin Scales显示文摘The Pangolin,a soil-burrowing animal,is covered with scales. These scales are often abraded by soil and rock and their surface is corrugated. The abrasive wear of the surface of the scales was examined. The scales were taken from a pangolin that had died of natural causes. The tests were run on a rotary disc abrasive wear tester. The abrasive material was quartz sand(96.5 wt.%) and bentonite(3.5 wt.%) . The morphology of the abraded surfaces and the abrasion were examined by stereoscopic microscopy and scanning electron microscopy. The concepts are proposed of 'Guiding-Effect' and 'Rolling-Effect' on the textured surfaces under free abrasive wear conditions and the critical dimensions of the 'Rolling-Effect' are discussed.Jin Tong Tie-biao Lu Yun-hai Ma Heng-kun Wang Lu-quan Ren R. D. Arnell 2007Journal of Bionic Engineering2007,4,2:12
14Small RNA Profiling Reveals Phosphorus Deficiency as a Contributing Factor in Symptom Expression for Citrus Huanglongbing Disease显示文摘Huanglongbing (HLB ) 是与类 Candidatus Liberibacter 的细菌被联系的破坏柠檬疾病(Ca。L.) 。强大的诊断工具和管理策略被需要控制 HLB。小 RNA (sRNA ) 玩的主人在调整主人回答到病原体感染的一个重要角色并且为许多人的疾病被用作早诊断的标记,包括癌症。决定是否柠檬 sRNAs 调整主人回答到 HLB, sRNAs 从柠檬 sinensis 被介绍有 Ca 的 10 和 14 星期柱子 grafting。L。asiaticus (Las ) 积极或健康的织物。十新 microRNAs (miRNAs ) , 76 保存 miRNAs,和许多小介入 RNA (siRNAs ) 被发现。几 miRNAs 和 siRNAs 被 Las 感染高度导致,并且能潜在地被开发进 HLB 的早诊断标记。miR399,被磷饥饿在另外的植物种类导致,被与类似于 HLB 的症状引起柠檬 stubborna 疾病的 Las 然而并非 Spiroplasma citri 的感染明确地导致。我们与健康的树相比在 Las 积极的柠檬树上发现了磷的 35% 减小。HLB 积极的香甜的橘子树的适用的磷 oxyanion 答案减少了 HLB 症状严厉并且显著地在西南佛罗里达在 3 年的地试用期间改进了水果生产。我们的分子,生理,并且地数据建议那磷缺乏被连接到 HLB 疾病 symptomology。Hongwei Zhao Ruobai Sun Ute Albrecht Chellappan Padmanabhan Airong Wanga Michael D. Coffey Thomas Girke Zonghua Wang Timothy J. Close Mikeal Roose Raymond K. Yokomi Svetlana Folimonova Georgios Vidalakis Robert Rouse Kim D. Bowman Hailing Jin 2013Molecular Plant2013,6,2:12
15Experimental investigation of time-dependent cavitation in an oscillatory squeeze film显示文摘The occurrence of time-dependent cavitation and tensile stress in an oscillatory oil squeeze film were investigated experimentally. The test apparatus was a simple thrust bearing consisting of two parallel circular plates separated by a thin viscous oil film. During the test, one plate was at rest while the other (transparent) oscillated in a direction normal to its surface. This test configuration was chosen to avoid the rotational motion and complicated geometry of a squeeze film journal bearing. The frequency of oscillation was in the range of 5 to 50 Hz and was controlled by an electro-magnetic exciter. The process of cavity formation and its subsequent development was recorded by a high-speed video camera. Concomitant pressure in the oil film was measured both within and without the cavitation region. It was found that both tensile stress and cavities existed in a squeeze film under certain working conditions.CHEN Xiaoyang, SUN Meili, WANG Wen, D. C. SUN, ZHANG Zhiming & WANG XiaojingResearch Institute of Bearings, Shanghai University, Shanghai 200072, China Department of Mechanical Engineering, State University of New York at Binghamton, NY 13902-6000, USA 2004Science China(Physics,Mechanics & Astronomy)2004,47,z1:10
16Regional Simulation of Soil Organic Carbon Dynamics for Dry Farmland in East China by Coupling a 1:500000 Soil Database with the Century Model显示文摘Changes in soil organic carbon (SOC) in agricultural soils influence soil quality and greenhouse gas concentrations in the atmosphere. Dry farmland covers more than 70% of the whole cropland area in China and plays an important role in mitigating carbon dioxide (CO2) emissions. In this study, 4109 dry farmland soil polygons were extracted using spatial overlay analysis of the soil layer (1:500000) and the land use layer (1:500000) to support Century model simulations of SOC dynamics for dry farmland in Anhui Province, East China from 1980 to 2008. Considering two field-validation sites, the Century model performed relatively well in modeling SOC dynamics for dry farmland in the province. The simulated results showed that the area-weighted mean soil organic carbon density (SOCD) of dry farmland increased from 18.77 Mg C ha1 in 1980 to 23.99 Mg C ha1 in 2008 with an average sequestration rate of 0.18 Mg C ha1 year?1. Approximately 94.9% of the total dry farmland area sequestered carbon while 5.1% had carbon lost. Over the past 29 years, the net SOC gain in dry farmland soils of the province was 19.37 Tg, with an average sequestration rate of 0.67 Tg C year1. Augmentation of SOC was primarily due to increased consumption of nitrogen fertilizer and farmyard manure. Moreover, SOC dynamics were highly differentiated among dry farmland soil groups. The integration of the Century model with a fine-scale soil database approach could be conveniently utilized as a tool for the accurate simulation of SOC dynamics at the regional scale.WANG Shi-Hang SHI Xue-Zheng ZHAO Yong-Cun D. C. WEINDORF YU Dong-Sheng XU Sheng-Xiang TAN Man-Zhi SUN Wei-Xia 2011Pedosphere2011,21,3:9
17Review of Femtosecond Laser Fabricated Fiber Bragg Gratings for High Temperature Sensing显示文摘C. R. LIAO D. N. WANG 2013Photonic Sensors2013,3,2:9
18ON HYDRODYNAMIC INSTABILITIES,CHAOS AND PHASE TRANSITION显示文摘Ellipticity as the underlying mechanism for instabilities of physi-cal systems is highlighted in the study of model nonlinear evolution equations withdissipation and the study of phase transition in Van der Waals fluid. Interestingresults include spiky solutions, chaotic behavior in the context of partial differentialequations, as well as the nucleation process due to elhpticity in phase transition.D. Y. Hsieh S. Q. Tang X. P. Wang 1996Acta Mechanica Sinica1996,12,1:9
19小鼠肾细胞癌模型的MR动脉自旋标记成像测量的肿瘤灌注与抗血管生成治疗反应间是否具有相关性?显示文摘目的确定抗血管生成治疗前及治疗早期动脉自旋标记(ASL)MRI表现可否预测晚期发生的治疗抵抗。方法该方案经动物保护和应用委员会批准。将Caki~1、A498及786—0人类。肾细胞癌异种移植到39只裸鼠中。一旦肿瘤长到12mm,每天对裸鼠按照80mg/kg体质量注射1次索拉非尼。在治疗前及治疗后14d时采集ASL影像,并对786—0及A498的裸鼠增加成像检查(3d~12周)。分析平均m流量值及血流量在空间分布上的差异.并与组织病理学的存活性及微血管密度进行比较。对肿瘤平均血流量的差异进行t检验,R.S.Bardach D. C.A lsop I.Pedrosa S.A .Solazzo X. Wang R. P.Marquis 曹毅(译) 刘竞艳(校) 2009国际医学放射学杂志2009,32,4:8
20煤矿新工人早期肺通气功能的变化显示文摘目的 研究煤矿粉尘对新工人肺通气功能的早期影响。方法 选择徐州矿务集团新招收的男性工人2 87人为矿工组,选择该集团技工学校在校男生132人为对照组。调查内容包括个人基本资料、家族疾病史、职业史、吸烟史、作业场所粉尘浓度、肺通气功能随访测定。前瞻性队列调查为期3年,每半个月测定作业场所的总粉尘和呼吸性粉尘浓度;定期测定两组人群的用力肺活量(FVC)和第一秒用力呼气量(FEV1)。结果 矿工作业场所的总粉尘平均浓度为2 3.8mg/m3 ,呼吸性粉尘平均浓度为8.9mg/m3 ,均超过国家卫生标准。接尘第1年,矿工组FVC(5 .19L)高于对照组(4.92L) ,差异有统计学意义(P <0 .0 1) ,第2年和第3年的差异均无统计学意义(P >0 .0 5 )。接尘前矿工组FEV1[(4.4 8±0 .4 9)L]高于对照组[(4.2 8±0 .4 8)L];接尘1年时FEV1下降至4 .2 5L ;第2年和第3年FEV1(4.34L)低于对照组(4.5 6L) ,差异有统计学意义(P <0 .0 1)。矿工组FEV1呈下降趋势。矿工吸烟者3年中的FVC、FEV1损失量(15 4、184ml)高于不吸烟者(83、91ml)。FVC、FEV1与年龄、身高和体重存在一定相关。结论 粉尘对煤矿新工人的早期肺通气功能有明显影响,FEV1下降比FVC更为明显;吸烟可加重粉尘对肺通气功能的损害。彭开良 Mei-lin Wang 杜庆国 李亚东 Michael D. Attfield 韩桂海 Edward L. Petsonk 李绍奎 吴植恩 2005中华劳动卫生职业病杂志2005,23,2:8
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