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Petroleum Science 2024年第2期21卷 1320-1332页

作者： Jian-Yu He Fei Xie Dan Wang guang-Xin Liu Ming Wu Yue qin College of Petroleum Engineering Liaoning Petrochemical UniversityFushun113001LiaoningChina Key Laboratory of Oil and Gas Storage and Transportation Technology in Liaoning Province Fushun113001LiaoningChina State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China PipeChina West East Gas Pipeline Company Shanghai200120China

Magnetic field and microorganisms are important factors influencing the stress corrosion cracking(SCC)of buried oil and gas pipelines. Once SCC occurs in buried pipelines, it will cause serious hazards to the soil environment. The SCC behavior of X80 pipeline steel under the magnetic field and sulfate-reducing bacteria(SRB) environment was investigated by immersion tests, electrochemical tests, and slow strain rate tensile(SSRT) tests. The results showed that the corrosion and SCC sensitivity of X80 steel decreased with increasing the magnetic field strength in the sterile environment. The SCC sensitivity was higher in the biotic environment inoculated with SRB, but it also decreased with increasing magnetic field strength, which was due to the magnetic field reduces microbial activity and promotes the formation of dense film layer. This work provided theoretical guidance on the prevention of SCC in pipeline steel under magnetic field and SRB coexistence.

关键词： Magnetic field Sulfate-reducing bacteria Film layer Stress corrosion cracking Oil and gas pipelines

Predictive value of neutrophil-to-lymphocyte ratio and other inflammatory indicators in estimating clinical severity of coronavirus disease

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World Journal of Emergency Medicine 2021年第1期12卷 79-80页

作者： guang-qing Yu qing Zhang Run-chang Wang Shi-qin Jiang Department of Microbiological Laboratory Bao’an District Center for Disease Control and PreventionShenzhen 518101China Department of Neurology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Clinical Pharmacy Shenzhen Hospital of Integrated Traditional Chinese and Western MedicineShenzhen 518104China

Dear editor,The recent outbreak of coronavirus disease(COVID-19)has become a major public health issue caused by 2019 novel coronavirus(2019-nCoV).[1]Severe COVID-19 patients may reveal a dysregulated immune response that allows the development of v iral hyperinfl ammation.[2]In the fight against COVID-19,inflammatory parameters towards illness severity should be identified to improve the prognosis of *** this study,we aimed to assess the discriminative ability of several infl ammation indicators in severe COVID-19 infection.

关键词： severity prognosis estimating

Identification of the Potential Function of circRNA in Hypertrophic Cardiomyopathy Based on Mutual RNA-RNA and RNA-RBP Relationships Shown by Microarray Data

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Journal of Electronic Science and Technology 2021年第1期19卷 41-52页

作者： guang-Bin Wang Ni-Ni Rao Chang-Long Dong Xiao-qin Lyu the School of Life Science and Technology University of Electronic Science and Technology of ChinaChengdu 610054 the Computer Department Chengdu College of University of Electronic Science and Technology of ChinaChengdu 610097

The pathogenesis of hypertrophic cardiomyopathy(HCM)is very complicated,particularly regarding the role of circular RNA(circRNA).This research pays special attention to the relationships of the circRNA-mediated network,including RNA-RNA relationships and RNA-RNA binding protein(RNA-RBP)*** use the parameter framework technology proposed in this paper to screen differentially expressed circRNA,messenger RNA(mRNA),and microRNA(miRNA)from the expression profile of samples related to *** 31 pairs of circRNA and mRNA relationship pairs were extracted,combined with the miRNA targeting database;145 miRNA-mRNA relationship pairs were extracted;268 circRNA-mRNA-miRNA triads were established through the common mRNA in the 2 types of relationship ***,268 circRNA-miRNA regulatory relationships were deduced and 30 circRNARBP relationship pairs were analyzed at the protein *** this basis,a circRNA-mediated regulatory network corresponding to the two levels of RNA-RNA and RNA-RBP was *** then the roles of circRNA in HCM were analyzed through circRNA-mRNA,circRNA-miRNA,and circRNA-RBP,and the possible role in disease development mas inferred.

关键词： circular RNA(circRNA) circular RNA-messanger RNA-microRNA(circRNA-mRNA-miRNA) coexpression network functions analysis hypertrophic cardiomyopathy regulatory network RNA-binding protein(RNARBP).

Pho to luminescence and Photoluminescence Excitation of Si Aerogels Prepared by Supercritical Drying

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Chinese Physics Letters 1996年第1期13卷 62-64页

作者： GUO Guo-lin XU Dong-sheng YAO guang-qing TANG you-qi ZHANG Li-dong LIN Jun MA Shu-yi DUAN Jia-qi ZHANG Bo-rui qin Guo-gang Department of Chemistry Peking UniversityBeijing 100871 Department of Physics Peking UniversityBeijing 100871

Si aerogel,the porous silicon with ultra high porosity,has been prepared by the technique of anodization followed by supercritical *** photoluminescence,photoluminescence excitation and morphological features exhibit novel characteristics from those of the conventionally anodized porous *** observed the differences between the Si aerogels made&om(100)and(111)crystalline Si.

关键词： porous excitation porosity

Mechanical Property of M40J_f/5A06Al Composite at Elevated Temperatures

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Acta Metallurgica Sinica(English Letters) 2015年第9期28卷 1175-1182页

作者： Da-guang Li Guo-qin Chen Long-Tao Jiang Xiu Lin Gao-Hui Wu School of Materials Science and Engineering Harbin Institute of Technology State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Heilongjiang Academy of Industrial Technology

In this work, aluminum alloy with a high concentration of magnesium （5A06） was reinforced with 55 vol% unidirectional ultra-high modulus and highly graphitized carbon fiber （M40J） using pressure infiltration method. The effect of temperature on the bending strength of the Cf/A1 composites was investigated from room temperature to 500 ℃. The experimental results showed that the strength of M40Jf/5A06A1 composites was not affected by temperature from room temperature to 200 ℃. The bending strength of the composite at 300 ℃ was decreased by 30% compared with that at room temperature. In order to evaluate the extent of interface weakening, the length of fiber pullout was measured. The results showed that the pullout length reached the maximum at 300 and 500 ℃, which indicated weak interface at the corre- sponding temperature. The DSC curve presented obvious heat absorption peak at around 300 ℃, which may be attributed to the dissolution of the interfacial product （A13Mg2） phases at the C/A1 interface. The bending fracture surfaces of the composites after three-point bending tests were observed by SEM, plastic-viscous flow of the matrix were observed at the samples tested at 500 ℃. The predominant mechanisms for high-temperature damage of M40Jf/5A06A1 composites are matrix softening caused by dislocation recovery and interface weakening caused by the dissolution of interfacial products.

关键词： Carbon fiber Aluminum Metal matrix composites High-temperature properties Fiberpullout length

Transjugular intrahepatic portosystemic shunt for the prevention of recurrent esophageal variceal bleeding in patients with cavernous transformation of portal vein

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Hepatobiliary & Pancreatic Diseases International 2018年第6期17卷 517-523页

作者： Zhao-Peng Li Sui-Sui Wang guang-Chuan Wang guang-Jun Huang Jing-qin Cao Chun-qing Zhang Department of Gastroenterology Shandong Provincial Hospital Affiliated to Shandong UniversityJinan 250021China Department of Interventional Radiology Jining No.1 People’s HospitalJining 272011China Department of Pediatrics The Affiliated Hospital of Jining Medical CollegeJining 272000China

Background: Treatment options for patients with cavernous transformation of portal vein(CTPV) are limited. This study aimed to evaluate the feasibility, efficacy and safety of transjugular intrahepatic portosystemic shunt(TIPS) to prevent recurrent esophageal variceal bleeding in patients with CTPV. Methods: We retrospectively analyzed 67 consecutive patients undergone TIPS from January 2011 to December 2016. All patients were diagnosed with CTPV. The indication for TIPS was a previous episode of variceal bleeding. The data on recurrent bleeding, stent patency, hepatic encephalopathy and survival were retrieved and analyzed. Results: TIPS procedure was successfully performed in 56 out of 67(83.6%) patients with CTPV. TIPS was performed via a transjugular approach alone( n = 15), a combined transjugular/transhepatic approach( n = 33) and a combined transjugular/transsplenic approach( n = 8). Mean portosystemic pressure gradient(PSG) decreased from 28.09 ± 7.28 mmHg to 17.53 ± 6.12 mmHg after TIPS( P < 0.01). The probability of the remaining free recurrent variceal bleeding was 87.0%. The probability of TIPS patency reached 81.5%. Hepatic encephalopathy occurrence was 27.8%, and survival rate was 88.9% until the end of follow-up. Four out of 11 patients who failed TIPS died, and 4 had recurrent bleeding. Conclusions: TIPS should be considered a safe and feasible alternative therapy to prevent recurrent esophageal variceal bleeding in patients with CTPV, and to achieve clinical improvement.

关键词： Cavernous transformation Portal vein Transjugular intrahepatic portosystemic shunt Variceal rebleeding Portal hypertension

Extraction and characterization of bound extracellular polymeric substances from cultured pure cyanobacterium(Microcystis wesenbergii)

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Journal of Environmental Sciences 2014年第8期26卷 1725-1732页

作者： Lizhen Liu Boqiang qin Yunlin Zhang guangwei Zhu guang Gao Qi Huang Xin Yao State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography & LimnologyChinese Academy of Sciences University of Chinese Academy of Sciences School of Environment and Planning Liaocheng University

Preliminary characterization of bound extracellular polymeric substances（bEPS） of cyanobacteria is crucial to obtain a better understanding of the formation mechanism of cyanobacterial bloom. However,the characterization of bEPS can be affected by extraction methods. Five sets（including the control） of bEPS from Microcystis extracted by different methods were characterized using three-dimensional excitation and emission matrix（3DEEM） fluorescence spectroscopy combined chemical spectrophotometry; and the characterization results of bEPS samples were further compared. The agents used for extraction were NaOH,pure water and phosphate buffered saline（PBS） containing cationic exchange resins,and hot water. Extraction methods affected the fluorescence signals and intensities in the bEPS. Five fluorescence peaks were observed in the excitation and emission matrix fluorescence spectra of bEPS samples. Two peaks（peaks T1 and T2） present in all extractions were identified as protein-like fluorophores,two（peaks A and C） as humic-like fluorophores,and one（peak E） as a fulvic-like *** these substances,the humic-like and fulvic-like fluorescences were only seen in the bEPS extracted with hot water. Also,NaOH solution extraction could result in strong fluorescence intensities compared to the other extraction methods. It was suggested that NaOH at pH 10.0 was the most appropriate method to extract bEPS from Microcystis. In addition,dialysis could affect the yields and characteristics of extracted bEPS during the determination process. These results will help us to explore the issues of cyanobacterial blooms.

关键词： Bound extracellular polymeric substances(bEPS) Extraction Fluorescence intensities Microcystis Three-dimensional excitation and emission matrix(3DEEM)

A Chandra study of the massive, distant galaxy cluster SDSS J0150–1005

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Research in Astronomy and Astrophysics 2013年第10期13卷 1155-1162页

作者： Zhen-Zhen qin Hai-guang Xu Jing-Ying Wang Jun-Hua Gu Department of Physics Shanghai Jiao Tong University National Astronomical Observatories Chinese Academy of Sciences

We present a study of a fossil cluster,SDSS J0150–1005（z 0.364）,with high spatial resolution based on the imaging spectroscopic analysis of Chandra *** Chandra X-ray image shows a relaxed and symmetric morphology,which indicates that SDSS J0150–1005 is a well-developed galaxy cluster with no sign of a recent *** to the isothermal model,its global gas temperature is 5.73±0.80 keV,and the virial mass is 6.23±1.34×1014M⊙.Compared with the polytropic temperature model,the mass calculated based on the isothermal model is overestimated by 49%±*** central gas entropy,S0.1 r200=143.9±18.3 keV cm2,is significantly lower than the average value of normal galaxy clusters with similar *** results indicate that SDSS J0150–1005 formed during an early epoch.

关键词： galaxies:clusters:general galaxies:evolution galaxies:halos—intergalactic medium X-rays:galaxies:clusters

Effects of UV-B radiation intensity and timing on epidemiological components of wheat stripe rust

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Journal of Integrative Agriculture 2018年第12期17卷 2704-2713页

作者： WANG Hui qin Feng CHENG Pei MA Zhan-hong WANG Hai-guang Department of Plant Pathology China Agricultural UniversityBeijing 100193P.R.China Rizhao Agricultural Bureau of Shandong Province Rizhao 276800P.R.China

Stripe rust caused by Puccinia striiformis f. sp. tritici is an important wheat disease worldwide that is greatly influenced by environmental conditions. Ultraviolet B(UV-B) radiation is one important environmental factor affecting the occurrence and epidemiology of wheat stripe rust. Investigating UV-B radiation effects on the epidemiology of stripe rust may be conducive to monitoring and predicting this disease. In this study, wheat seedlings were exposed to UV-B radiation during different periods under laboratory conditions and radiation effects on epidemiological components of wheat stripe rust were investigated. Results showed that incubation period was shortened, and the infection efficiency, sporulation quantity and disease index increased when UV-B radiation was performed only pre-inoculation. When the UV-B radiation was performed only postinoculation or both pre-and post-inoculation, the incubation period was prolonged, and the infection efficiency, sporulation quantity and disease index were reduced. When healthy wheat seedlings were inoculated using urediospores collected from wheat leaves irradiated by UV-B only post-inoculation or both pre-and post-inoculation, infection efficiency, sporulation quantity and disease index were also reduced. However, in the latter, the disease incubation period did not differ under varying UV-B radiation intensities compared to that when wheat leaves were not treated with UV-B radiation. Overall, the effects of direct exposure of wheat plants to UV-B radiation with different intensities in different periods on epidemiological components of wheat stripe rust were systematically explored, and the results suggest that the effects of UV-B radiation increased gradually with the increase of UV-B radiation intensity. This information provides a basis for monitoring and predicting this disease as well as for conducting further studies on pathogen virulence variation.

关键词： wheat stripe rust UV-B radiation epidemiological component Puccinia striiformis f.sp.tritici

Inclusion Complexation of β-CD with Phenothiazine and N-Alkylphenothiazine Derivatives

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Chinese Chemical Letters 1998年第11期9卷 0-0,0-0页

作者： Wen guang LI Xiu qin RUAN qing Xiang GUO you Cheng LIU (Institute of Chemical Metallurgy, Chinese Academy of Sciences, Beijing 100080)(National Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000)(Department of Chemistry, Univer Chinese Acad Sci Inst Chem Met Beijing 100080 Peoples R China Lanzhou Univ Natl Lab Appl Organ Chem Lanzhou 730000 Peoples R China Univ Sci & Technol China Dept Chem Anhua 230026 Peoples R China

Inclusion of Acyclodextrin (ACD) with phenothiazine 1 and Nalkylpheno-thiazine derivatives (alkyl = ethyl 2, isobutyl 3 and isopentyl 4) in aqueous solution was studied by means of UV-vis spectroscopy. The association constant Ka values for the inclusion of β-CD with 1, 2, 3 and 4 were determined to be 188, 214, 129 and 80 L/mol, respectively. It indicates that the stability of the inclusion complexes is dependent on the structure and the volume of the substituents in the guest compounds.

关键词： β-cyclodextrin inclusion complex phenothiazine derivatives stability