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Discretized skew-t mixture model for deconvoluting liquid chromatograph mass spectrometry data

STATISTICA NEERLANDICA 2023年第3期77卷 284-303页

作者： Zhu, xuwen Zhang, xiang Univ Alabama Syst Dept Informat Syst Stat & Management Sci Tuscaloosa AL 35487 USA Univ Louisville Dept Chem Louisville KY USA Univ Alabama Syst Dept Informat Syst Stat & Management Sci Tuscaloosa AL 35487 USA

In this paper, new statistical algorithms for accurate peak detection in the metabolomic data are proposed. Specifically, liquid chromatograph-mass spectrometry data are analyzed. The discretized skew-tmixture model for peak detection is proposed. It shows great flexibility and capability in fitting skewed or heavy-tailed peaks. The methodology is further extended to cross-sample peak alignment for identifying the true peaks. A measure of peak credibility is provided through the assessment of misclassification probabilities between two cross-sample peaks. The proposed algorithms are applied to spike-in data with promising results.

关键词： finite mixture model metabolomic data overlap peak detection skew-t mixture

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化工园区污水处理提标改造设计案例

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云南化工 2024年第8期51卷 160-163页

作者：项绪文袁志明沈军李体康赵伟李星山东省环科院环境工程有限公司山东济南250013

某化工园区污水处理厂工程建设规模为1.5万m^(3)/d,要求出水水质的COD及氨氮从《城镇污水处理厂污染物排放标准》(GB18918—2002)的一级A标准提标至《地表水环境质量标准》(GB3838-2002)IV类水。经改造后,污水处理厂的处理工艺为“缓冲... 详细信息

某化工园区污水处理厂工程建设规模为1.5万m^(3)/d,要求出水水质的COD及氨氮从《城镇污水处理厂污染物排放标准》(GB18918—2002)的一级A标准提标至《地表水环境质量标准》(GB3838-2002)IV类水。经改造后,污水处理厂的处理工艺为“缓冲水池+调节池+初沉池+臭氧氧化+厌氧水解+A/O+A/O+二沉池+絮凝沉淀池+分配池+臭氧催化氧化+活性焦吸附+紫外线消毒”。废水经过预处理及生化改造,解决了有机物去除及脱氮难的问题,通过臭氧催化氧化和活性焦的深度处理,保证了COD的指标,使水质达到新的排放标准。

关键词：化工园区废水处理提标改造臭氧催化氧化活性焦

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聊城市区污水处理厂进水水质特征的统计学分析

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净水技术 2023年第9期42卷 104-115页

作者：刘娟贾新强沈军项绪文刘亚钦赵伟山东省环科院环境工程有限公司山东济南250013

根据聊城市区6座污水处理厂2022年监测数据,分析污水处理厂进水水质特征,包括进水指标COD_(Cr)、BOD_(5)、SS、氨氮、TN、TP的变化规律和概率统计分析,以及进水污染物的比例分析。结果表明,各项水质指标数据分布呈正偏态分布,各水质指... 详细信息

根据聊城市区6座污水处理厂2022年监测数据,分析污水处理厂进水水质特征,包括进水指标COD_(Cr)、BOD_(5)、SS、氨氮、TN、TP的变化规律和概率统计分析,以及进水污染物的比例分析。结果表明,各项水质指标数据分布呈正偏态分布,各水质指标间存在一定的线性关系,除BOD_(5)与COD_(Cr)、COD_(Cr)与TP、TN与氨氮的相关关系最为显著(R2=0.5635、0.5004、0.7750)外,其他指标间相关性均较弱,TP与SS几乎不存在线性关系。进水污染物营养分析表明,6座污水处理厂达到BOD_(5)/COD_(Cr)≥0.3的概率分别为100.00%、97.92%、95.12%、90.24%、97.87%和97.67%,表明污水处理厂的可生化性均较好;6座污水处理厂达到BOD_(5)/TN≥4的概率非常小,大部分污水处理厂碳源不足,需要额外增加碳源才能实现反硝化;6座污水处理厂达到BOD_(5)/TP≥17的概率分别为85.42%、52.08%、42.50%、29.27%、23.40%和44.19%,说明污水处理厂进水部分满足生物除磷的要求,可以采用生物除磷工艺;6座污水处理厂达到SS/BOD_(5)≥1.2的概率分别为100.00%、97.96%、25%、65.00%、33.30%和93.02%,说明污水处理厂进水中无机物质比较多。

关键词：污水处理厂进水水质水质特征营养物概率统计分析

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Synthesis and bioactivity of 1,3-thiazolidine-2-thione derivatives against type III secretion system of Xanthomonas oryzae

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BIOORGANIC & MEDICINAL CHEMISTRY 2019年第15期27卷 3364-3371页

作者： Tao, Hui Tian, Hao Jiang, Shan xiang, xuwen Ahmed, Wasim Tang, Riyuan Cui, Zi-Ning South China Agr Univ Integrat Microbiol Res Ctr State Key Lab Conservat & Utilizat Subtrop Agrobi Guangdong Prov Key Lab Microbial Signals & Dis Co Guangzhou 510642 Guangdong Peoples R China South China Agr Univ Dept Appl Chem Coll Mat & Energy Guangzhou 510642 Guangdong Peoples R China

Targeting virulence factors of bacterial without affecting their growth and survival, has been an initiative strategy for the development of novel anti-microbial agents. The type III secretion system (T3SS), one of essential and highly conserved virulence factors in most Gram-negative pathogenic bacteria, has been regarded as an effective target that developed new anti-microbial drugs. Xanthomonas oryzae pv. oryzae (Xoo) is one of the most important bacterial pathogens on rice, which causes leaf blight disease. To discover potential anti-virulence agents against the pathogens, a new series of 1,3-thiazolidine-2-thione derivatives containing 5-phenyl-2-furan were designed and synthesized. Their structures were characterized by H-1 NMR, C-13 NMR, MS, and elemental analysis. All the title compounds inhibited the promoter activity of a harpin gene hpa1, significantly, that were further checked for the impact on bacterial growth. The results indicated that treatment of Xoo with the title compound III-7 did not affect bacterial growth or survival. Moreover, quantitative reverse transcription-polymerase chain reaction (qRT-PCR) analysis showed that the expression of the Xoo T3SS was suppressed by treatment with the inhibitor. The mRNA levels of representative genes in the hrp (hypersensitive response and pathogenicity) cluster, as well as the regulatory genes hrpG and hrpX, were reduced. Finally, the in vivo test demonstrated that the compounds could reduce the disease symptoms of Xoo on the rice cultivar (Oryza sativa) IR24.

关键词： Xanthomonas oryzae pv. oryzae (Xoo) Type III secretion system (T3SS) Small molecule inhibitors Virulence factors 1,3-Thiazolidine-2-thione

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含1,3,4-噻(噁)二唑吩嗪-1-甲酰胺类衍生物的合成与杀菌活性

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农药学学报 2021年第2期23卷 287-295页

作者：何敏古景文李司丞向绪稳姜珊崔紫宁亚热带农业生物资源保护与利用国家重点实验室群体微生物研究中心广东省微生物信号与作物病害防控重点实验室植物保护学院华南农业大学广州510642 岭南现代农业科学与技术广东省实验室广州510642

对广泛存在于链霉菌和铜绿假单胞菌中的一种天然活性物质——申嗪霉素进行了结构修饰,合成了一系列高活性的含1,3,4-噻(噁)二唑的申嗪霉素衍生物I1~I28。杀菌活性测定结果表明:所有目标化合物对禾谷镰刀菌具有较好的杀菌活性,均明显优... 详细信息

对广泛存在于链霉菌和铜绿假单胞菌中的一种天然活性物质——申嗪霉素进行了结构修饰,合成了一系列高活性的含1,3,4-噻(噁)二唑的申嗪霉素衍生物I1~I28。杀菌活性测定结果表明:所有目标化合物对禾谷镰刀菌具有较好的杀菌活性,均明显优于母体申嗪霉素。离体杀菌活性测定结果显示,化合物I_(8)(EC_(50)=33.25μg/mL)和化合物I22(EC_(50)=46.52μg/mL)对禾谷镰刀菌的杀菌活性是申嗪霉素(EC_(50)=128.54μg/mL)的3~4倍。活体杀菌活性显示,在500μg/mL质量浓度下,化合物I_(8)(58.69%)和化合物I22(55.37%)对禾谷镰刀菌的抑制率是申嗪霉素(25.14%)的两倍。构效关系分析结果表明,在苯环上引入吸电子基团对化合物的活性不利;而引入给电子基团则有利于提高其杀菌活性。同时,同一取代基在苯环上的取代位置依据活性的高低排列顺序为:邻位>对位>间位。这些结果可用于指导该类化合物的进一步结构改造。

关键词：吩嗪-1-甲酸 1 3 4-噻二唑 1 3 4-噁二唑杀菌活性

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臭氧氧化+AO-MBR+催化氧化工艺深度处理制药废水的工程应用

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绿色科技 2022年第16期24卷 152-156页

作者：赵伟项绪文刘娟沈军贾新强山东省环境保护科学研究设计院有限公司山东济南250011

由于制药废水经过两级生化处理后,可生化性差,水质成分复杂,总氮和悬浮物浓度高,采用臭氧氧化+AO-MBR+催化氧化联用工艺进行了深度处理,工程运行效果表明:该工艺具有良好的处理效果,抗冲击能力强,在进水COD_(Cr)为319.0~361.0 mg/L,总氮... 详细信息

由于制药废水经过两级生化处理后,可生化性差,水质成分复杂,总氮和悬浮物浓度高,采用臭氧氧化+AO-MBR+催化氧化联用工艺进行了深度处理,工程运行效果表明:该工艺具有良好的处理效果,抗冲击能力强,在进水COD_(Cr)为319.0~361.0 mg/L,总氮为45.0~60.0 mg/L,悬浮物为400.0~500.0 mg/L;出水COD_(Cr)稳定在32.0~45.0 mg/L,总氮稳定在8.6~14.0 mg/L,SS≤10.0 mg/L。出水指标优于《城镇污水处理厂污染物排放标准》(GB18918-2002)一级A标准,可为此类废水处理提供参考。

关键词：制药废水臭氧氧化 AO MBR 催化氧化深度处理

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Synthesis and biological evaluation of 1,3,4-thiadiazole derivatives as type III secretion system inhibitors against Xanthomonas oryzae

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PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2019年 160卷 87-94页

作者： Tao, Hui Tian, Hao Jiang, Shan xiang, xuwen Lin, Yinuo Ahmed, Wasim Tang, Riyuan Cui, Zi-Ning South China Agr Univ Guangdong Prov Key Lab Microbial Signals & Dis Co Integrat Microbiol Res Ctr State Key Lab Conservat & Utilizat Subtrop Agrobi Guangzhou 510642 Guangdong Peoples R China South China Agr Univ Coll Mat & Energy Dept Appl Chem Guangzhou 510642 Guangdong Peoples R China

Xanthomonas oryzae pv. oryzae (Xoo) infection directly leads to a severe disease known as leaf blight, which is a major cause of yield loss of rice. Use of traditional bactericides has resulted in severe resistance in pathogenic bacteria. A new approach screening compounds that target the virulence factors rather than killing bacterial pathogens is imperative. In gram-negative bacteria, the type III secretion system (T3SS) is a conserved and significant virulence factor considered as a target for drug development. Therefore, we designed and synthesized a new series of 5-phenyl-2-furan carboxylic acid derivatives stitched with 2-mercapto-1,3,4-thiadiazole. Bioassays revealed that the title candidates attenuated the hypersensitive response through suppressing the promoter activity of a harpin gene hpa1 without affecting bacterial growth. Quantitative real time polymerase chain reaction (qRT-PCR) analysis demonstrated reduced the expression of several genes associated with T3SS, when title compounds were applied. Additionally, hrp gene cluster members, including hrpG and hrpX, had reduced mRNA levels. In vivo greenhouse tests showed that candidate compounds could alleviate the effects of Xoo infection in rice (Oryza sativa) and possess better protective activity against rice bacterial leaf blight than bismerthiazol and thiodiazole copper. All tested compounds were safe to rice. This work suggests there are new safe options for Xoo control in rice from these 1,3,4-thiadiazole derivatives.

关键词： 2-mercapto-1,3,4-thiadiazole Inhibitors Type III secretion system (T3SS) Anti-virulence factors Xanthomonas oryzae pv. oryzae (Xoo)

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Intra-articular injection of vancomycin after arthrotomy closure following gentamicin-impregnated bone cementation in primary total knee arthroplasty provides a high intra-articular concentration while avoiding systemic toxicity: a prospective study

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JOURNAL OF ORTHOPAEDIC SURGERY AND RESEARCH 2024年第1期19卷 1-9页

作者： Li, xuwen Lai, Junhao Yang, Xue Xu, Hao xiang, Shuai Qingdao Univ Affiliated Hosp Dept Traumatol Qingdao Shandong Peoples R China Qingdao Univ Affiliated Hosp Dept Joint Surg Qingdao 266000 Shandong Peoples R China Qingdao Univ Affiliated Hosp Operat Room Qingdao Shandong Peoples R China

BackgroundThis study aimed to elucidate the safety and intra-articular elution profiles of vancomycin and gentamicin bone cement in patients undergoing primary total knee arthroplasty (TKA), with a focus on serum safety thresholds and therapeutic *** patients who underwent unilateral primary TKA were prospectively enrolled. The implants were fixed using gentamicin-impregnated bone cement, and after arthrotomy closure, 1000 mg of vancomycin suspended in 25 mL of normal saline was directly injected into the joint. Peripheral venous blood and drain fluid samples were collected 2, 8, and 24 h postoperatively. The serum and intra-articular concentrations of vancomycin and gentamicin were analyzed using liquid chromatography-tandem mass spectrometry within 24 *** data reflecting renal and liver function were recorded preoperatively, and at 24 and 72 h postoperatively. A total of 100 patients were included. At 2, 8, and 24 h postoperatively, the serum vancomycin concentration was 7.0 +/- 2.0, 5.7 +/- 1.8, and 3.6 +/- 1.4 mu g/mL, respectively, while the intra-articular concentration was 468.5 (interquartile range [IQR] 286.0 to 774.8), 139.5 (IQR 52.0 to 295.3), and 34.4 (IQR 22.2 to 56.8) mu g/mL, respectively;33.2 (IQR 19.5 to 80.5) mg vancomycin was lost in drainage fluid at 24 h postoperatively. For gentamicin, the overall intra-articular concentration was 70.4 (IQR 35.4 to 109.2), 33.8 (IQR 17.8 to 73.9), and 21.1 (IQR 12.2 to 36.0) mu g/mL at 2, 8, and 24 h postoperatively, respectively, with an undetectable serum concentration. No cases of acute renal injury, liver injury, ototoxicity, or anaphylaxis were ***-articular injection of 1000 mg vancomycin after arthrotomy closure combined with gentamicin-impregnated bone cement provided a therapeutic intra-articular concentration while avoiding systemic toxicity over the initial 24 h after primary TKA. Therefore, intra-articular vancomycin administration may off

关键词： Vancomycin Gentamicin Total knee arthroplasty

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HPV vaccination strategy for 14-year-old females and economic returns for cervical cancer prevention in Wuxi City, China: a cost effectiveness analysis

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COST EFFECTIVENESS AND RESOURCE ALLOCATION 2024年第1期22卷 1页

作者： Jiang, Jingfeng Zhao, Fanqi Hong, xiang Wang, xuwen Nanjing Med Univ Wuxi Ctr Dis Control & Prevent Affiliated Wuxi Ctr Dis Control & Prevent Wuxi 214023 Peoples R China Southeast Univ Minist Educ Sch Publ Hlth Dept Epidemiol & Hlth StatKey Lab Environm Med & Nanjing Peoples R China

Background Since December 2021, Wuxi, China has offered a two-dose human papillomavirus (HPV) vaccination to 14-year-old females for free. This study evaluated the costs and benefits of this vaccination scheduled in the Expanded Program on Immunization in Wuxi from the perspective of the cities' demographic characteristics, economic development, and policy support. Methods The model-based economic evaluation used TreeAge Pro software to construct a decision tree-Markov model for the vaccination strategy in which 100,000 14-year-old females received two doses of bivalent HPV vaccine or no vaccination. Costs and effects of the strategy were assessed from a societal perspective through literature research and data obtained from the Wuxi Centre for Disease Control and Prevention. Univariate, multivariate, and probabilistic sensitivity analyses assessed the stability of the findings. Results The cost of the bivalent HPV vaccine in Wuxi is 711.3 CNY. The two-dose of bivalent HPV vaccine for 100,000 14-year-old females would cost an additional 658,016 CNY compared to no vaccination, but would result in 1,960 Quality Adjustment Years of Life (QALYs). Using the per capita gross domestic product of 187,415 CNY in 2021 in Wuxi as the willingness-to-pay threshold, the vaccination strategy costs 3,357.37 CNY per QALY gained, which is much lower than the threshold, suggesting that it is a very cost-effective strategy. In addition, the vaccine strategy reduced the incidence of cervical cancer by 300 cases and cervical cancer deaths by 181 cases, representing a benefit-cost ratio of 2.86 (> 1) when health output outcomes were measured in monetary terms. These results suggested that the vaccination strategy was advantageous. Sensitivity analyses showed that changes in the parameters did not affect the conclusions and that the findings were robust. Conclusions Compared to no vaccination, the delivery of two doses of bivalent HPV vaccine for 14-year-old females was a more highly cost-

关键词： Cost-effectiveness HPV Cervical cancer Vaccination

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Synthesis and bioactivity of thiazolidin-2-cyanamide derivatives against type III secretion system of Xanthomonas oryzae on rice

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PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2018年第Jul.期149卷 89-97页

作者： xiang, xuwen Tao, Hui Jiang, Shan Zhang, Lian-Hui Cui, Zi-Ning South China Agr Univ State Key Lab Conservat & Utilizat Subtrop Agrobi Integrat Microbiol Res Ctr Guangdong Prov Key Lab Microbial Signals & Dis Co Guangzhou 510642 Guangdong Peoples R China Guizhou Univ Minist Educ Key Lab Green Pesticide & Agr Bioengn Guiyang 550025 Guizhou Peoples R China

Targeting virulence factors of bacterial without affecting their growth and survival, has been an initiative strategy for the development of novel anti-microbial agents. The type III secretion system (T3SS), one of essential and highly conserved virulence factors in most Gram-negative pathogenic bacteria, has been regarded as an effective target that developed new anti-microbial drugs. Xanthomonas oryzae pv. oryzae (Xoo) is one of the most Important bacterial pathogens on rice, which causes leaf blight disease. To discover potential anti-virulence agents against the pathogens, a new series of thiazolidin-2-cyanamide derivatives containing 5-phenyl-2-furan were designed and synthesized. Their structures were characterized by H-1 NMR, C-13 NMR, MS, and elemental analysis. All the title compounds inhibited the promoter activity of a harpin gene hpa1, significantly, that were further checked for the impact on bacterial growth and on the hypersensitive response (HR) caused by Xoo on non-host tobacco plants. The results indicated that treatment of Xoo with the title compounds II-2,II-3 and II-4 resulted in significantly attenuated HR without affecting bacterial growth or survival. Moreover, quantitative reverse transcription-polymerase chain reaction (qRT-PCR) analysis showed that the expression of the Xoo T3SS was suppressed by treatment with the three inhibitors. The mRNA levels of representative genes in the hrp (hypersensitive response and pathogenicity) cluster, as well as the regulatory genes hrpG and hrpX, were reduced. Finally, the in vivo test demonstrated that the compounds could reduce the disease symptoms of Xoo on the rice cultivar (Oryza sativa) IR24.

关键词： Xanthomonas oryzae pv. oryzae (Xoo) Type III secretion system (T3SS) Small molecule inhibitors Virulence factors Thiazolidin-2-cyanamide Synthesis

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