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Tracer Experimental Study of the Main Conveying Conduits of CCl_4 Pollutant in the Qiligou Water Supply Resource

Journal of China University of Mining and Technology 2007年第2期17卷 184-187页

作者： PEI Zong-ping HAN Bao-ping LIU Han-hu LIANG Zhi ZHOU dong-lai ZHU Xue-qiang School of Environment and Spatial Informatics China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

The Ordovician karst groundwater in the Qiligou basin is an important water supply source. This groundwater has been seriously contaminated in recent years by Cfl4 from a pesticide plant located in the recharge area. The highest concentration of CCl4 in the groundwater is 3909.2μg/L. Large scale tracer experiments were carried out to study the conveying conduits for Cfl4 in the basin on May 1-6, 2005. Nontoxic, edible glucose was used as a tracer and it was detected by spectrophotometric techniques. Well area of the basin, was employed for injecting the tracer X-61, located near the pesticide plant in the southern recharge Ten wells widely located in the groundwater runoff area were used as observing and sampling wells. The results show that the migration of the pollutants is controlled by the water hydrodynamic field and by the development of karst conduits. The tracer did not enter the up-drainage wells, X-49 and X-47, near the injection point because the water levels at these wells are higher than at the injection point. The adjacent well X-62 is close to the injection site, but the tracer reached the well after eleven hours. Wells X-43, X-59, X-58, YY-1 and X-57, located in the syncline axis runoff area, are respectively 2.5, 3.5, 4.33, 4.38 and 5.44 kilometers from the in- jection site. The time for initial appearance of tracer was 4, 4, 2, 6 and 4 hours, respectively. The maximum runoff velocity （well X-58） is over two kilometers per hour, indicating that the karst conduits are well developed along the syncline basin axis. These conduits are the main conveying conduits for groundwater and Cfl4. Closer wells were not necessarily the first to receive tracer. This shows the inhomogeneity in karst development which causes complex runoff, and pollutant migration, patterns.

关键词： tracer experiment tracer karst groundwater CC14 contamination conveying conduit

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Geographic variation in parasitism rates of two sympatric cuckoo hosts in China

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Zoological Research 2014年第1期35卷 67-71页

作者： Can-Chao YANG dong-lai LI Long-Wu WANG Guo-Xian LIANG Zheng-Wang ZHANG Wei LIANG Ministry of Education Key Laboratory for Tropical Animal and Plant Ecology College of Life Sciences Hainan Normal University State Key Laboratory of Earth Surface Processes and Resource Ecology Ministry of Education Key Laboratory for Biodiversity Sciences and Ecological Engineering College of Life Sciences Beijing Normal University College of Life Sciences Liaoning University College of Life Sciences Wuhan University

Rates of brood parasitism vary extensively among host species and populations of a single host species. In this study, we documented and compared parasitism rates of two sympatric hosts, the Oriental Reed Warbler （Acrocephalus orientalis） and the Reed Parrotbill （Paradoxornis heudei）, in three populations in China. We found that the Common Cuckoo （Cuculus canorus） is the only parasite using both the Oriental Reed Warbler and Reed Parrotbill as hosts, with a parasitism rate of 22.4%-34.3% and 0%-4.6%, respectively. The multiple parasitism rates were positively correlated with local parasitism rates across three geographic populations of Oriental Reed Warbler, which implies that higher pressure of parasitism lead to higher multiple parasitism rate. Furthermore, only one phenotype of cuckoo eggs was found in the nests of these two host species. Our results lead to two conclusions：（1） The Oriental Reed Warbler should be considered the major host of Common Cuckoo in our study sites; and （2） obligate parasitism on Oriental Reed Warbler by Common Cuckoo is specialized but flexible to some extent, i.e., using Reed Parrotbill as a secondary host. Further studies focusing on egg recognition and rejection behaviour of these two host species should be conducted to test our predictions.

关键词： Acrocephalus orientalis Brood parasitism Host shift Egg phenotype before host shift Paradoxornis heudei.

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血清血管生成素样蛋白4对经皮冠状动脉介入术后支架内再狭窄的预测价值

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慢性病学杂志 2024年第3期 330-333,338页

作者：韦颖莫昌干花冠杰赖冬艳韦利元右江民族医学院附属河池医院心血管内科广西547000

目的探讨血清血管生成素样蛋白4(angiopoietin-like protein 4,ANGPTL_(4))对经皮冠状动脉介入(percutaneous coronary intervention,PCI)术后支架内再狭窄(in-stent restenosis,ISR)的预测价值。方法选取2021年7月至2022年7月在右江民族医学院附属河池医院心血管内科接受择期PCI术的136例冠心病(coronary heart disease,CHD)患者,依据是否发生ISR分为ISR组26例、非ISR组110例;ISR组依据是否发生主要心血管不良事件(major adverse cardiovascular events,MACE)分为MACE组(n=11)、非MACE组(n=15);选取30名健康人群为对照组。酶联免疫吸附法测定血清ANGPTL_(4)水平,并采集基线资料。结果ISR组和非ISR组的性别、年龄、体质量指数(body mass index,BMI)、吸烟、高血压、糖尿病、高血脂、病变支数、甘油三酯(triglyceride,TG)、高密度脂蛋白胆固醇(high density lipoprotein cholesterol,HDL-C)及术后服药情况比较无统计学差异(P>0.05);ISR组的总胆固醇(total cholesterol,TC)、低密度脂蛋白胆固醇(low-density lipoprotein cholesterol,LDL-C)及总胆红素(total bilirubin,TBIL)均高于非ISR组(P<0.05)。相较于对照组,非ISR组、ISR组的血清ANGPTL_(4)水平降低,且ISR组低于非ISR组(P<0.05)。MACE组的血清ANGPTL_(4)水平低于非MACE组(P<0.05)。受试者操作特征曲线(receiver operator characteristic,ROC)结果显示,血清ANGPTL_(4)预测PCI术后ISR的临界值为23.1 ng/mL,曲线下面积(area under the curve,AUC)为0.957(95%C I为0.907~0.984),敏感性为88.46%,特异性为92.73%。logistic多因素回归结果显示,低水平ANGPTL_(4)和高水平TBIL、TC是PCI术后ISR的独立危险因素。结论血清ANGPTL_(4)对ISR有较好的预测价值,低水平ANGPTL_(4)是PCI术后ISR的危险因素。

关键词：冠心病经皮冠状动脉介入治疗再狭窄

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教学设备自动驾驶汽车线控底盘系统设计

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机械工程与自动化 2024年第4期 107-108页

作者：李中志赖冬寅周少璇黄丹万雄四川工商职业技术学院四川都江堰611830

通过对现有自动驾驶汽车底盘结构分析,在线控转向系统、线控制动系统、线控驱动系统等方面不断匹配优化设计,设计了一套线控底盘教学设备。该设备通过循迹标定操作后能够实现汽车的自动前进、自动后退、自动转向等动作,并且易拆装,方便... 详细信息

通过对现有自动驾驶汽车底盘结构分析,在线控转向系统、线控制动系统、线控驱动系统等方面不断匹配优化设计,设计了一套线控底盘教学设备。该设备通过循迹标定操作后能够实现汽车的自动前进、自动后退、自动转向等动作,并且易拆装,方便学生实操学习和掌握自动驾驶汽车关键技术,有利于促进自动驾驶汽车技术在未来的普及和应用。

关键词：自动驾驶线控底盘教学设备

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Cutaneous Rosai-Dorfman disease presenting as a granulomatous rosacea-like rashs

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Chinese Medical Journal 2011年第5期124卷 793-794页

作者： SHI Xiu-yan MA dong-lai FANG Kai Department of Dermatology Peking Union Medical College Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100730 China

A case of cutaneous Rosai-Dorfman disease （CRDD） presenting as a granulomatous rosacea-like rashs was reported. A 45-year-old Chinese woman presented with a 1-month history of a widespread nonpruiginous papulonodular eruption. The rash had begun on her face and rapidly progressed to involve the neck and extremities. She was otherwise healthy, with no history of fever, malaise, or weight loss. Physical examination revealed multiple symmetrically distributed discrete and coalescing red plaques, papules and nodules scattered over the face, neck and extremities. No appreciable lymphadenopathy or hepatosplenomegaly was noted. There was no mucosal involvement. The biopsy specimen obtained from the face demonstrated the epidermis was normal, while the superficial dermis contained sheets of histiocytes with abundant, focally foamy cytoplasm. The histiocytes were surrounded by a patchy lymphocytic and plasma cell infiltrate. There was no significant histiocytic atypia. Some of these histiocytes engulfed, without destroying, lymphocytes and neutrophils （emperipolesis）. Immunohistochemical staining revealed that the histiocytes were strongly positive for S100 protein, weakly positive for CD68, and negative for CDla. A diagnosis of CRDD was made. Oral prednisone therapy was initiated at a dosage of 30 mg/d for 3 weeks and then tapered over the ensuing 2 weeks. After 5 weeks of treatment, the lesions had markedly improved.

关键词： Rosai-Dorfman disease sinus histiocytosis with massive lymphadenopathy skin granulomatous rosacea

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Clinical and experimental study of effect of Raondix Salviae Militiorrhiza and other blood activating and stasis eliminating Chinese herbs on hemodynamics of portal hypertension

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World Journal of Gastroenterology 1998年第5期4卷 76-79页

作者： YAO Xi Xian, CUI dong lai, SUN Yu Feng and LI Xiao Tian

AIM To study the effects of Radix Salviae Militiorrhiza (RSM), other blood-activating and stasis-eliminating Chinese herbs on hemodynamics of portal *** Portal pressure of cirrhotic dogs after chronic common bile duct ligation was measured directly; portal blood flow in patients with liver cirrhosis were detected by ultrasound *** After administration of RSM and Radix Angelicae Sinensis (RAS) by intravenous infusion in cirrhosis dogs, the portal venous pressure (Ppv), wedge hepatic venous pressure (WHVP), hepatic venous pressure gradient (HVPG), were significantly decreased (P＜0.05-0.01), but the mean arterial pressure (MAP), and the heart rate (HR) remained unchanged. When nifedipine was used, Ppv, WHVP, MAP and HR were significantly decreased (P＜0.05), and the MVPG unchanged (P＞0.05). After administration of RSM, RSM+nifedipine and RSM+Hirudin+Nifedpin for 10-12 weeks, the diameter of portal vein (Dpv), spleen vein (Dsv), the portal venous flow (Qpv) and splenic venous flow (Qsv) in patients with hepatic cirrhosis were significantly lowered (P＜0.05-0.01), and the effect of RAS was *** The efficacy of decreasing Ppv by Chinese herbs-RSM, RAS, etc. as compared with nifedipine, demonstrated that the Chinese herbs were slower in action than that of nifedipine, but more long-lasting and without side effects. Hence, long-term administration of Chinese herbs, would be more beneficial.

关键词： hypertension, portal liver cirrhosis hemodynamics drugs, Chinese herbal blood activating and stasis eliminating

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Breeding and Identification of Insect-Resistant Rice by Transferring Two Insecticidal Genes,sbk and sck

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Rice science 2013年第1期20卷 19-24页

作者： ZHANG Qi-jun LI Cong LIU Shao-kui lai dong QI Qing-ming LU Chuan-gen Institute of Food Crops Jiangsu Academy of Agricultural Sciences/Jiangsu High Quality Rice R&D Center College of Agriculture Nanjing Agricultural University

The plasmid of pCDMARUBA-Hyg, which contained two insect-resistance genes, sbk （modified from CrylA（c）） and sck （modified from CpTI）, was transformed into an Agrobacterium EHA105 for infection of the calli of a super japonica rice Nanjing 45. Primarily, using polymerase chain reaction （PCR） detection with the primers of sbk and sck genes, 42 positive transgenic plants that were marker-free and contained the two target genes were selected from 97 regenerated plants. Results of southern-blotting indicated that 23, 11, 5, 2 and 1 plants had one, two, three, four and five copies of the transformed genes, respectively. Analysis of reverse transcription PCR （RT-PCR） and Bt gene testing paper showed that 28 T3 generation plants derived from four transgenic plants having a single copy were insect-resistant. Feeding experiment with rice stem borer revealed that the insect resistance was greatly increased with the larva mortality ranging from 94% to 100%. In addition, among the transgenic plants, three T3 transgenic plants possessed some desirable characteristics for breeding and production, such as plant height, seed-setting rate, 1000-grain weight and larva mortality. The mechanism of insect resistance of Bt .qene and its application in rice transgenic research were also briefly discussed.

关键词： Oryza sativa sbk gene sck gene insect resistance transgene breeding

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Design of diamond-shaped transient thermal cloaks with homogeneous isotropic materials

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Frontiers of physics 2016年第5期11卷 111-117页

作者： Ting-Hua Li dong-lai Zhu Fu.Chun Mao Ming Huang Jing-Jing Yang Shou-Bo Li Technical Center of China Tobacco Yunnan Industrial Co. Ltd. Kunming 650231 China School of Information Science and Engineering Yunnan University Kunming 650091 China

Transformation thermodynamics as a major extension of transformation optics has recently received considerable attention. In this paper, we present two-dimeusional （2D） and three-dimensional （3D） diamond-shaped transient thermal cloaks with non-singular homogeneous material parameters. The absence of singularity in the parameters results from the fact that the linear coordinate transformation is performed by expanding a line segment rather than a point into a region, while the mechanism behind the homogeneity is the homogeneous stretching and compression along orthogonal directions during the transformation. Although the derived parameters remain anisotropic, we further show that this can be circumvented by considering a layered structure composed of only four types of isotropic materials based on the effective medium theory. Numerical simulation results confirm the good performance of the proposed cloaks.

关键词： transformation thermodynamics metamaterials thermal cloak effective medium theory

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STUDY ON A NEW APPROACH OF CAVITATION EROSION TEST FOR NONMETALLIC MATERIALS

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Journal of Hydrodynamics 1999年第3期11卷 75-82页

作者： Liu Zhi ping, Zhang dong, Jin Tai lai China Institute of Water Resources and Hydropower Reserarch, Beijing 100038, P.R.China (Received Nov.9, 1998)

This paper deals with the reconstruction and innovation of an ordinary magnetostriction apparatus for cavitation erosion tests of non metallic materials. It aims at making testing specimen to be independent of amplitude amplifier rod, thus overcoming the difficulties of fixing tightly the non metallic specimen to the vibrating rod. Such approach makes the exposure area greatly increased and effectively mitigates the effect of non homogeneity of non metallic specimen on the testing results, thus extending the application of magnetostriction apparatus to carry out cavitation erosion tests to larger size of non metallic and non homogeneous materials. It will render a set of new innovative apparatus and recently developed method to conduct fast and simple cavitation erosion test in days to come. Simultaneously, several tests on non metallic materials have been made by means of such new apparatus, yielding satisfactory results and witnessing the availability of new methods.

关键词： cavitation erosion non metallic materials magnetostriction

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Acidic electroreduction CO_(2)to formic acid via interfacial modification of Bi nanoparticles at industrial-level current

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Nano Research 2024年第7期17卷 5817-5825页

作者： Tian dong Hongdong Li Zhenhui Wang Yanling Geng Rui Chang Xiaofeng Tian Jianping lai Shouhua Feng Lei Wang Key Laboratory of Eco-Chemical Engineering International Science and Technology Cooperation Base of Eco-Chemical Engineering and Green ManufacturingCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection College of Environment and Safety EngineeringQingdao University of Science and TechnologyQingdao 266042China

Electrocatalytic CO_(2)reduction reaction(CO_(2)RR)in acidic media is a promising approach to overcome the unavoidable formation of carbonates in alkaline or neutral ***,the proton-rich environment near the catalyst surface favors hydrogen evolution reactions(HER),leading to lower energy efficiency of the desired products,especially in industrial-level current ***,quaternary ammonium cationic surfactant(cetyltrimethylammonium bromide(CTAB))was introduced into acidic electrolyte to modulate the interfacial microenvironment,which greatly enhanced CO_(2)electroreduction to formic acid(HCOOH)at the Bi/C nanoparticles *** a Bi/C nanoparticles electrode with CTAB added,constant production of formic acid was enabled with a cathodic energy efficiency of>40%and maximum FE_(HCOOH)(FE=Faradaic efficiency)of 86.2%at−400 mA·cm^(−2)over 24 *** with in-situ attenuated total reflection Fourier transform infrared spectroscopy,the concentration of*OCHO intermediates significantly increased after CTAB modification,confirming that the hydrophobic interface microenvironment formed by dynamic adsorption of positively charged long alkyl chains on Bi/C nanoparticle electrodes inhibited HER and improved the selectivity of CO_(2)RR to HCOOH.

关键词： acidic media CO_(2)electrolysis electrolyte additive hydrophobic interfacial microenvironment industrial-level current

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