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Chinese Journal of Polymer Science 2007年第2期25卷 187-195页

作者： Wen-xi Cheng li-ya shi shi-yun li Hui Chen Tao Tang State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

The possibility of mesoporous acid solid as a carder for metallocene catalyst in ethylene polymerization and catalyst for polyethylene （PE） catalytic degradation was investigated. Here, HMCM-41 and AIMCM-41, and mesoporous silicoaluminophosphate molecular sieves （SAPO1 and SAPO2） were synthesized and used as acid solid. Much more gases were produced during catalytic degradation in PE/acid solid mixtures via in situ polymerization than those via physical mixing. The particle size distribution results exhibited that the particle size of SAPO1 in the PE/SAPOI mixture via in situ polymerization was about 1/14 times of that of the original SAPO1 or SAPO1-supported metallocene catalyst. This work shows a novel technology for chemical recycling of polyolefin.

关键词： Catalytic degradation Acid solids Supported metallocene catalysts Polyethylene.

An on-line solid phase extraction-liquid chromatography tandem mass spectrometry method for the determination of perfluoroalkyl substances in the Antarctic ice core samples

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Chinese Chemical Letters 2015年第9期26卷 1073-1078页

作者： ya-li shi Yuan-Yuan Pan li-Na liang ya-Qi Cai State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental ScienceChinese Academy of Sciences Thermo Fisher Scientific(China)Co. Ltd.

An on-line solid phase extraction-high performance liquid chromatography-tandem mass spectrometry method for the analysis of perfluoroalkyl substances（PFASs） in water samples was *** optimal analytical conditions were obtained through the optimization of the extraction efficiency of online solid phase extraction column,sample loading rate and loading volume,and the concentration of ammonium acetate in mobile *** the optimal condition,the analytical method displayed good linearity（r^2〉0.99） for 12 PFASs（C5-C14 perfluoroalkyl carboxylic acids and C6/C8 perfluoroalkyl sulfonic acids） over a concentration range of 0.5-100 ng/*** limits of quantitation for samples were between 0.025 ng/L and 0.5 ng/L and the relative standard deviations（RSD） of five consecutive analyses were less than 10%for 1 ng/L standard *** results were obtained using this analytical method for the analysis of perfluoroalkyl substances in Antarctic ice core *** recoveries of all perfluoroalkyl substances were in a range of 73%-117%when the samples were spiked with standards at the concentrations of 2.5 ng/L and 25 ng/L.

关键词： Perfluoroalkyl substances On-line solid phase extraction LC-MS/MS Antarctic ice cores

Realization of an Automated Microassembly Task Involving Micro Adhesive Bonding

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International Journal of Automation and computing 2013年第6期10卷 545-551页

作者： Fu-Dong li De Xu Zheng-TaoZhang ya-li shi Research Center of Precision Sensing and Control Institute of AutomationChinese Academy of Sciences

An automated approach is proposed for a microassembly task, which is to insert a 10 μm diameter glass tube into a 12 μm diameter hole in a silicon substrate, and bond them together with ultraviolet （UV） curable adhesive. Two three-degree-of-freedom micromanipulators axe used to move the glass tube and the dispensing needle, respectively. Visual feedback is provided by an optical microscope. The angle of the microscope axis is precisely calibrated using an autofocus strategy. Robust image segmentation method and feature extraction algorithm are developed to obtain the features of the hole, the glass tube and the dispensing needle. Visual servo control is employed to achieve accurate aligning for the tube and the hole. Automated adhesive dispensing is used to bond the glass tube and the silicon substrate together after the insertion. On-line monitoring ensures that the diameter of the adhesive spot is within a desired range. Experimental results demonstrate the effectiveness of the proposed strategy.

关键词： Micro adhesive bonding microassembly visual servo control image segmentation feature extraction.

Perfluorinated compounds in blood of textile workers and barbers

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Chinese Chemical Letters 2014年第8期25卷 1145-1148页

作者： Cheng Lu ya-li shi Zhen Zhou Nan-Nan liu Zhao-Fu Meng ya-Qi Cai Department of Environmental Engineering College of Resource and Environment Northwest A & F University State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences

12 perfluorinated compounds（PFCs） in human blood from workers in a textile mill in Shandong province and several barbershops in Tianjin were analyzed in this study. It was found that perfluorooctanesulfonate（PFOS） and perfluorooctanoate（PFOA） were the most prominent PFCs, with average concentrations of 5.73 mg/L and 5.46 mg/L for textile workers, and 2.55 mg/L and 2.84 mg/L for *** and perfluorohexanesulfonate（PFHxS） concentrations revealed a positive correlation in blood samples（p 〈 0.01）, and concentrations among PFOS, perfluorononanoic acid（PFNA） and perfluorodecanoic acid（PFDA） also revealed positive correlations（p 〈 0.01）. The influence of gender and age on PFC concentration in blood was also investigated, and the results showed that there was no statistically significant difference between the male and female samples, as well as in samples from people with different ages. Generally speaking, the textile workers

关键词： Perfluorinated compounds Blood Textile workers Barbers

New insights on serodiagnosis of trichinellosis during window period:early diagnostic antigens from Trichinella spiralis intestinal worms

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Infectious Diseases of Poverty 2017年第1期6卷 368-371页

作者： Zhong-Quan Wang ya-li shi Rou-Dan liu Peng Jiang ya-Yi Guan Ying-Dan Chen Jing Cui Department of Parasitology Medical CollegeZhengzhou UniversityZhengzhou 450052China National Institute of Parasitic Diseases Chinese Center for Disease Control and PreventionKey Laboratory of Parasite and Vector BiologyMinistry of HealthShanghai 200025China

The clinical diagnosis of trichinellosis is difficult because its clinical manifestations are *** of anti-Trichinella IgG by EliSA using *** muscle larval excretory-secretory(ES)antigens is the most commonly used serological method for diagnosis of trichinellosis,but the main disadvantage is false negativity during the early stage of *** is an obvious window period between Trichinella infection and antibody *** the intestinal stage of Trichinella infection,the ES antigens of intestinal worms(intestinal infective larvae and adults)are exposed to host’s immune system at the earliest time and elicit the production of specific anti-Trichinella ***-Trichinella IgG antibodies in infected mice were detectable by EliSA with ES antigens of intestinal worms as soon as 8-10 days post infection(dpi),but EliSA with muscle larval ES antigens did not permit detection of infected mice before 12 ***,the new early antigens from *** intestinal worms should be screened,identified and characterized for early serodiagnosis of trichinellosis.

关键词： Trichinellosis Early serodiagnosis Intestinal infective larvae Adult worms

The surface adsorption and micelle formation of the mixed aqueous solutions of fluorocarbon and hydrocarbon surfactants——Ⅱ.Sodium perfluorooctanoate-sodium decylsulfate system

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Acta Chimica Sinica(English Edition) 1984年第2期2卷 111-118页

作者： ZHAO Guo-Xi ZHU Bu-yao ZHOU ya-Ping shi li Department of Chemistry,Peking University Department of Chemistry Peking University

The adsorption and micellar behavior of the mixed solutions of sodium perfluorooctanoate（7CFNa）and sodium decylsulfate(C10SNa)have been studied at constant ion strength of *** ad-sorption wascalculated from the surface（and interfacial）tension-concentration curves by applying *** was found that the cmc’s of 7CFNa and C10SNa are of nearly the same value(1.66×10-2m and 1.45×10-2m,respectively),but γcmcof 7CFNa solution is～23 mNm-1,which is much lowerthan that of C10SNa *** implies that 7CFNa would have a much higher surface activitythan C10SNa and be adsorbed preferentially;for instance,7CFNa has a surface mole fraction ofabout 0.8 in the saturated adsorption layer of the 1:1 mixed *** mole fractions of7CFNa at the surface are always greater than those in the bulk *** adsorption at the n-heptane-aqueous solution interface is quite different from that at the air-solution ***10SNa is preferentially adsorbed owing to'Mutual phobicity'between the HC-chain of n-heptaneand the FC-chain of 7CFNa at the *** the cmc’s obtained from the γ-log m relations of7CFNa (or C10SNa)in the mixed solutions have nearly the same value and the cmc-x curves show apositive deviation from the ideal *** further indicates that in the mixed solutions of fluorocarbonand hydrocarbon surfactants no completely miscible micelle but essentially the individual micelle ofeach surfactant exist due to the'Mutual phobicity'between FC-and HC-chain in the micellizationprocess.

关键词： CF Sodium perfluorooctanoate-sodium decylsulfate system The surface adsorption and micelle formation of the mixed aqueous solutions of fluorocarbon and hydrocarbon surfactants

Germacrane Sesquiterpene Esters from Salvia roborowskii

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有机化学 2003年第z1期23卷 7-7页

作者： li ya shi yan-Ping li Yu National Laboratory of Applied Organic Chemistry Lanzhou University and Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 National Laboratory of Applied Organic Chemistry Lanzhou University and Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 National Laboratory of Applied Organic Chemistry Lanzhou University and Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000

　　Salvia roborowskii Maxim, usually called "ye zhi ma" by local inhabitants of northwestern China, an annual or biennial herb distributed widely in the west of China, has long been used as a traditional folk medicin... 详细信息

关键词： Salvia roborowskii in the west of China northwestern China

Morphological and mitochondrial genomic characterization of eyeworms(Thelazia callipaeda) from clinical cases in central China

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Morphological and mitochondrial genomic characterization of ...

Antiviral therapy for hepatitis B virus infection is beneficial for the prognosis hepatocellular carcinoma

第十一届全国寄生虫学青年工作者学术研讨会

作者： Xi Zhang ya li shi Zhong Quan Wang Jiang yang Duan Peng Jiang Ruo Dan liu Jing Cui Department of Parasitology School of Basic Medical SciencesZhengzhou University

Objective:Thelazia callipaeda,also called the oriental eyeworm,is the major etiological agent of human *** of thelaziasis have increased in recent years in *** this species is of medical importance,the genetics and phylogenetic systematics of *** are poorly ***:In this study,we first reported three cases of thelaziasis in central *** clinical isolates were identified as *** according to morphological characteristics by light microscopy and scanning electron ***,complete mitochondrial(mt) genomes for the three *** isolates from different geographical locations were fully characterized using an Illumina sequencing *** addition,all available mt genomes of spirurid nematodes in Gen Bank were included to reconstruct the phylogeny and to explore the evolutionary histories of the ***:The genome features of the *** isolates contained 12 PCGs,22 transfer RNA genes,two ribosomal RNA genes and a major non-coding *** mt DNA nucleotide sequences of the *** isolates from different hosts and different locations were *** nad6 gene showed high sequence variability among all isolates,which is worth considering for future population genetic studies of *** analyses based on maximum parsimony(MP) and Bayesian inference(BI) methods revealed close relationships among Thelaziidae,Onchocercidae,Setariidae,Gongylonematidae,Physalopteridae,Dracunculidae and *** monophyly of the *** isolates from different hosts and distinct geographical locations was ***:The entire mt genomes of *** presented in this study will serve as a useful dataset for studying the population genetics and phylogenetic relationships of Thelazia species.

关键词： Thelazia callipaeda thelaziasis mitochondrial genome next generation sequencing phylogeny

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 1-9页

作者： Hui Wan Yu-Xin Zhang Guan-Yue Shan Jun-ya Cheng Duan-Rui Qiao Yi-Ying liu Wen-Na shi Hai-Jun li Institute of Translational Medicine The First Hospital of Jilin UniversityChangchun 130061Jilin ProvinceChina Department of Bioengineering Pharmacy School of Jilin UniversityChangchun 130061Jilin ProvinceChina Institute of liver Diseases Institute of Translational MedicineThe First Hospital of Jilin UniversityChangchun 130061Jilin ProvinceChina

In this editorial,we comment on the article by Mu et al,published in the recent issue of the World Journal of Gastrointestinal *** pay special attention to the immune tolerance mechanism caused by hepatitis B virus(HBV)infection,the pathogenesis of hepatocellular carcinoma(HCC),and the role of antiviral therapy in treating HCC related to HBV *** infection leads to systemic innate immune tolerance by directly inhibiting pattern recognition receptor recognition and antiviral signaling pathways,as well as by inhibiting the immune functions of macrophages,natural killer cells and dendritic *** addition,HBV leads to an immunosuppressive cascade by expressing inhibitory molecules to induce exhaustion of HBV-specific cluster of differentiation 8+T cells,ultimately leading to long-term viral *** loss of immune cell function caused by HBV infection ultimately leads to ***-term antiviral therapy can improve the prognosis of patients with HCC and prevent tumor recurrence and metastasis.

关键词： Hepatitis B virus Hepatocellular carcinoma Hepatitis B virus-DNA Immune tolerance Antiviral therapy

Germacrane Sesquiterpene Esters from Salvia roborowskii

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Germacrane Sesquiterpene Esters from Salvia roborowskii