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Redox-triggered hydroarylation of o-(hydroxyalkyl)arylalkynes with arylsulfonyl chlorides using visible light catalysis

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Science China Chemistry 2016年第2期59卷 184-189页

作者： Renjie song Jiadong xia Jiangxi Yu Jinheng Li State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China Key Laboratory of Functional Organometallic Materials of College of Hunan Province College of Chemistry and Material Science Hengyang Normal University Hengyang 421008 China

A new radical-mediated method for the synthesis of 1-(2-(1,2-diarylvinyl)phenyl)ethan-1-ones by the redox hydroarylation of o-(hydroxyalkyl)arylalkynes with arylsulfonyl chlorides is described. This visible light catalysis method proceeds via a sequence of the radical addition of aryl group across the C?C triple bond, protonation and redox reaction, and represents a new redox transformation reaction directed by a neighboring hydroxyl group.

关键词： hydroarylation redox visible light catalysis alkynes arylsulfonyl chlorides

L log L criterion for a class of multitype superdiffusions with non-local branching mechanisms

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Science China Mathematics 2019年第8期62卷 1439-1462页

作者： Zhen-Qing Chen Yan-xia Ren Renming song Department of Mathematics University of Washington Seattle WA 98195 USA LMAM School of Mathematical Sciences & Center for Statistical SciencePeking University Beijing 100871 China Department of Mathematics University of Illinois Urbana IL 61801 USA

In this paper, we provide a pathwise spine decomposition for multitype superdiffusions with nonlocal branching mechanisms under a martingale change of measure. As an application of this decomposition,we obtain a necessary and sufficient condition(called the L log L criterion) for the limit of the fundamental martingale to be non-degenerate. This result complements the related results obtained in Kyprianou et al.(2012),Kyprianou and Murillo-Salas(2013) and Liu et al.(2009) for superprocesses with purely local branching mechanisms and in Kyprianou and Palau(2018) for super Markov chains.

关键词： multitype superdiffusion non-local branching mechanism switched diffusion spine decomposition martingale

Diagnostic value of metagenomics next-generation sequencing technology in disseminated strongyloidiasis

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World Journal of Clinical Cases 2022年第33期10卷 12455-12457页

作者： Peng song xia Li Department of Respiratory Medicine Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250000Shandong ProvinceChina Department of Thoracic Surgery Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250021Shandong ProvinceChina

The symptoms of disseminated strongyloidiasis are not typical,and it is difficult for clinicians to identify strongyloidiasis in some non-endemic *** report a 70-year-old woman who was diagnosed with Guillain-Barrésyndrome due to autonomic disturbance,symmetrical bulbar palsy,and lower-motor-nerve damage in the extremities;her symptoms continued to worsen after hormone and immunoglobulin ***,parasitic larvae were found in the patient’s gastric fluid,and metagenomic next generation sequencing(mNGS)detection of bronchoalveolar-lavage fluid also found a large number of Strongyloides *** patient was diagnosed with disseminated *** patient was given albendazole for anthelmintic treatment,but died two days after being transferred to the intensive care unit due to the excessive strongyloidiasis *** recent years,mNGS has been increasingly used in clinical practice,and is becoming the main means of detecting strongyloides stercoralis in non-endemic *** during the corona virus disease 2019 pandemic,mNGS technology has irreplaceable value in identifying the source of infection.

关键词： Metagenomics Next-generation sequencing Disseminated Strongyloidiasis

Dynamical Interaction Between Information and Disease Spreading in Populations of Moving Agents

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Computers, Materials & Continua 2018年第10期57卷 123-144页

作者： Lingling xia Bo song Zhengjun Jing Yurong song Liang Zhang Department of Computer Information and Cyber Security Jiangsu Police InstituteNanjing210031China College of Telecommunications and Information Engineering Nanjing University of Posts and TelecommunicationsNanjing210003China Global Big Data Technologies Centre University of Technology SydneySydney2007Australia College of Computer Engineering Jiangsu University of TechnologyChangzhou213001China College of Automation Nanjing University of Posts and TelecommunicationsNanjing210003China

Considering dynamical disease spreading network consisting of moving individuals,a new double-layer network is constructed,one where the information dissemination process takes place and the other where the dynamics of disease spreading *** the basis of Markov chains theory,a new model characterizing the coupled dynamics between information dissemination and disease spreading in populations of moving agents is established and corresponding state probability equations are formulated to describe the probability in each state of every node at each *** Carlo simulations are performed to characterize the interaction process between information and disease spreading and investigate factors that influence spreading *** results show that the increasing of information transmission rate can reduce the scale of disease spreading in some *** infection period and strengthening consciousness for self-protection by decreasing individual’s scope of activity both can effectively reduce the final refractory density for the disease but have less effect on the information *** addition,the increasing of vaccination rate or decreasing of long-range travel can also reduce the scale of disease spreading.

关键词： Complex networks Markov chains theory interaction process spreading dynamics double-layer network

Catalytic Characteristics of Lipase Immobilized in CTAB/TX-100 MBG

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Chemical Research in Chinese Universities 2010年第1期26卷 110-113页

作者： song Shao-fang LUAN Yu-xia College of Chemistry and Material Science Shandong Agricultural University Tai ＇an 271018 P. R. China Institute of Pharmaceuties School of Pharmaceutical Science Shandong University Jinan 250100 P. R. China

CTAB/TX-100 microemtdsion-based gel（MBG）, which could be soaked in aqueous solution for a long time without mechanical strength and shape changes, was successfully prepared. Lipase immobilized in this gel had a higher activity than that in CTAB MBG when catalyzed the esterification reaction between n-hexanoic acid and n-octanol and its enantioselectivity was slightly higher when catalyzed the stereoselective esterification reaction between racemic ibuprofen and n-octanol. In aqueous solution, lipase in CTAB/TX-100 MBG could catalyze smoothly the hydrolysis reaction of olive oil and could be reused many times without the evident change of MBG mechanical strength although its activity decreased 41.8% after nine-time recycles.

关键词： Microemulsion-based gel(MBG) Immobilized lipase Activity Stereoselectivity Esterification Hydrolysis

Supercritical superprocesses: Proper normalization and non-degenerate strong limit

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Science China Mathematics 2019年第8期62卷 1519-1552页

作者： Yan-xia Ren Renming song Rui Zhang LMAM School of Mathematical Sciences & Center for Statistical Science Peking University Beijing 100871 China Department of Mathematics University of Illinois Urbana IL 61801 USA School of Mathematical Sciences Nankai University Tianjin 300071 China School of Mathematical Sciences Capital Normal University Beijing 100048 China

Suppose that X ={Xt, t≥0;Pμ} is a supercritical superprocess in a locally compact separable metric space E. Let φ0 be a positive eigenfunction corresponding to the first eigenvalue λ0 of the generator of the mean semigroup of X. Then Mt := e-λ0t〈φ0,Xt〉 is a positive martingale. Let M∞ be the limit of Mt. It is known(see Liu et al.(2009)) that M∞ is non-degenerate if and only if the L log L condition is satisfied. In this paper we are mainly interested in the case when the L log L condition is not satisfied. We prove that, under some conditions, there exist a positive function γt on [0,∞) and a non-degenerate random variable W such that for any finite nonzero Borel measure μ on E,lim/t→∞γt〈φ0,Xt〉=W, a.s.-Pμ.We also give the almost sure limit of γt〈f, Xt〉for a class of general test functions f.

关键词： superprocesses Seneta-Heyde norming non-degenerate strong limit martingales

Effect of HbA_(1c) combined FPG on screening diabetes in health checkup

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Asian Pacific Journal of Tropical Medicine 2012年第6期5卷 472-475页

作者： Li-Juan Li Jing-xia Zhou Guang-Tao Chen Yan-Ling song Yao-ming Xue Department of Endocrinology and Metabolic Disease Nanfang HospitalSouthern Medical University Department of Geriatrics Affiliated Hospital of Hainan Medical University Department of Medicine Hainan General Hospital of Armed Police Department of Neurology Hainan Agricultural Reclamation Hospital

Objective:To appraise the effectiveness of HbA_(1c) and fasting plasma glucose(FPG) on screening diabetes in health ***:A total of 1 337 individuals(male 850,female 487),aged 27 to 91 years with HbA_(1c) test were *** with HbA_(1c)≥6.0%or FPG≥6.1 mmol/ L underwent oral glucose tolerance test(OGTT).Diabetes mellitus was diagnosed according to the criteria of WHO in 1999,FPG≥7.0 mmol/L and/or OGTT 2 h-postload plasm glucose(2 h-PG)≥11.1 mmol/*** sensitivity and specificity of HbA_(1c) thresholds and FPG or combination test on screening of diabetes were ***:A total of 842 subjects had HbA_(1c)<6.0%,in which 32 had isolated FPG≥6.1 mmol/L,of 495 had HbA_(1c)≥6.0%.Subjects with HbA_(1c)≥6.0% had significant increased disorder indexes than those with HbA_(1c)<6.0%.527 subjects who had HbA_(1c)≥6.0%or FPG≥6.1 mmol/L underwent OGTT.A total of 234 subjects were newly diagnosed diabetes,including 123(123/234,52.56%) with FPG≥7.0 mmol/L,and 111 subjects(111/234, 47.43%) with isolated 2 h-PG≥11.1 mmol/*** 234 new diabetes,91.88%(215 subjects) had HbA_(1c)≥6.3%,and 77.40%(181 subjects) had HbA_(1c)≥6.5%.HbA_(1c)≥6.3%combined FPG≥7.0 mmol/L increased the positive rate of newly diagnosed diabetes from 91.88%to 96.58%. Conclusions:HbA_(1c) is a practical and convenient tool for screening undiagnosed diabetes in routine health check-up of a large *** use of HbA_(1c)≥6.3%and/or FPG≥7.0 mmol/L is efficient for early detection of diabetes.

关键词： HbA_(1c) Diabetes Screening Health checkup

A survey on vision-based UAV navigation

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Geo-Spatial Information Science 2018年第1期21卷 21-32页

作者： Yuncheng Lu Zhucun Xue Gui-song xia Liangpei Zhang State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhanChina

Research on unmanned aerial vehicles(UAV)has been increasingly popular in the past decades,and UAVs have been widely used in industrial inspection,remote sensing for mapping&surveying,rescuing,and so ***,the limited autonomous navigation capability severely hampers the application of UAVs in complex environments,such as GPS-denied ***,researchers mainly focused on the use of laser or radar sensors for UAV *** the rapid development of computer vision,vision-based methods,which utilize cheaper and more flexible visual sensors,have shown great advantages in the field of UAV *** purpose of this article is to present a comprehensive literature review of the vision-based methods for UAV *** on visual localization and mapping,obstacle avoidance and path planning,which compose the essential parts of visual ***,throughout this article,we will have an insight into the prospect of the UAV navigation and the challenges to be faced.

关键词： Unmanned aerial vehicles(UAV) visual SLAM obstacle avoidance path planning

Anaerobic co-digestion of thermo-alkaline pretreated microalgae and sewage sludge: Methane potential and microbial community

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Journal of Environmental Sciences 2023年第5期127卷 133-142页

作者： Jiaqi Fu Bing Yan Shuanglin Gui Yinxuan Fu song xia Institute of Energy Research Jiangxi Academy of SciencesNanchang 330096China

To improve methane production from sewage sludge(SS),co-digestion of SS and microalgae(MA)was studied and the application of thermo-alkaline pretreatment to MA was *** results showed that thermo-alkaline pretreatment at 90℃ for 120 min on MA was the optimum pretreatment ***,when the volatile solids(VS)ratio of SS and MA was 1:2,the methane yield reached maximum(368.94 mL/g VS).Fourier transform infrared(FT-IR)and thermogravimetric analysis confirmed the synergetic effects of thermoalkaline pretreated MA on its co-digestion with *** analyses of microbial community indicated that Methanobacterium and Methanosarcina were the dominant methanogens during the co-digestion ***,the relative abundance of Methanosarcina in thermoalkaline pretreated groups was higher compared to unpretreated *** microbial community structure might be affected by thermo-alkaline pretreatment rather than by the MA dosage in the co-digestion.

关键词： Anaerobic co-digestion Thermo-alkaline pretreatment Microalgae Sewage sludge Microbial community