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Effects of Micellization Behavior on the Interfacial Adsorption in Binary Anionic/Nonionic Surfactant Systems: A Molecular Simulation Study

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LANGMUIR 2021年第40期37卷 11835-11843页

作者： Lian, peng Jia, Han Yan, Hui Yuan, Jie Tang, Hongtao Li, Zhe Fan, Fangning Qin, xuwen Lv, Kaihe Liu, Dexin China Univ Petr East China Sch Petr Engn Qingdao 266580 Peoples R China China Univ Petr East China Sch Petr Engn Shandong Key Lab Oilfield Chem Qingdao 266580 Peoples R China Liaocheng Univ Sch Pharmaceut Sci Liaocheng 252059 Shandong Peoples R China SINOPEC Shengli Oilfield Co Shengli Oil Prod Plant Dongying 257000 Peoples R China

A surfactant interfacial adsorption process is highly associated with its micellization behaviors in the water phase, which is of great fundamental and practical significance in enhanced oil recovery. In this paper, the typical anionic surfactant 1-dodecanesulfonic acid sodium (DAS) and nonionic surfactants octylphenol polyoxyethylene ether-n (OP-n, n = 1, 5, and 10) are introduced to investigate their micellization behavior and interfacial adsorption process via molecular dynamics simulation. Number density profiles reveal that the additional OP5 molecules in the water phase generate the mixed micelle with DAS molecules and greatly promote its interfacial adsorption. Interaction energy calculation is employed to confirm the interaction of anionic/nonionic surfactants in the mixed micelle. Then, the radial distribution function, solvent-accessible surface area, and solvation free energy are calculated to further explore and verify the adsorption mechanism of the mixed micelle. It is found that the nonionic surfactant obviously decreases the hydrophilicity of the mixed micelle in the water phase, which should be responsible for its intensive tendency of the interfacial adsorption.

关键词： Adsorption Molecules Micelles Surfactants Water

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Patients with tuberculous meningitis and hepatitis B co-infection have increased risk for antituberculosis drug-induced liver injury and poor outcomes

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INFECTIOUS DISEASES 2020年第11期52卷 793-800页

作者： Mo, Xichao Xu, xuwen Ren, Zuning Guan, Junjie peng, Jie Southern Med Univ Nanfang Hosp Dept Infect Dis 1838 Guangzhoudadaobei Rd Guangzhou 510515 Peoples R China

Background:Tuberculous meningitis (TBM) is one of the most severe forms of tuberculosis. Previous studies reported that hepatitis B virus (HBV) infection could increase the risk of antituberculosis drug-induced liver injury (ATB-DILI) in pulmonary tuberculosis patients. To date, only a few studies exist on the effect of HBV on TBM. Methods:This inpatient study retrospectively analyzed the medical records of patients who were diagnosed with TBM between June 2002 and June 2018. Statistical analysis was used to reveal the difference between the HBV and non-HBV groups. Univariate analysis and multivariate regression analysis were performed on data to determine the prognostic factors of TBM. Results:A total of 386 patients were enrolled in our study, 57 of whom were included in the HBV group and 329 in the non-HBV group. The HBV group showed a higher frequency of ATB-DILI (HBV group: 14.0% versus non-HBV group: 3.3%,p < .001) and a higher risk of poor outcomes (i.e. death during inpatient period or neurological deficit at discharge, HBV group: 31.6% versus non-HBV group: 19.8%,p = .045) than the non-HBV group. The multivariate regression analysis identified ATB-DILI, scores of 3-8 on the Glasgow Coma Scale and hydrocephalus as independent predictors of poor outcomes in TBM patients. Conclusions:Our study demonstrated that HBV co-infection could increase the incidence of ATB-DILI and the risk of poor outcomes as identified by three predictors in TBM patients.

关键词： Tuberculous meningitis hepatitis B virus antituberculosis drug-induced liver injury predictors

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Optimizing planting density and nitrogen application to enhance profit and nitrogen use of summer maize in Huanghuaihai region of China

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SCIENTIFIC REPORTS 2022年第1期12卷 1-9页

作者： Zhang, HaiYan Zhang, ChengRan Sun, peng Jiang, xuwen Xu, GuangHai Yang, JinZhong Qingdao Agr Univ Qingdao Peoples R China

Low planting density and irrational nitrogen (N) fertilization are two common practices in conventional cropping of smallholder maize production in Huanghuaihai region of China. A 2-year field experiment was carried out to study the effects of N application and planting density on maize phenology, dry matter accumulation, profit, yield, N uptake and efficiency indices. The experiments included three N application levels (120 kg ha(-1), N1;180 kg ha(-1), N2;240 kg ha(-1), N3) and three planting densities (60,000 plants ha(-1), D1;75,000 plants ha(-1), D2;90,000 plants ha(-1), D3). Increasing N input and planting density delayed the physiological maturity and enhanced dry matter accumulation. Comparing with the traditional N3 level, grain yield and profit were kept stable at N2 level and decreased at N1 level, partial factor productivity of applied N (PFPN) and nitrogen efficiency ratio (NER) were increased with the decreasing of N level. Comparing with the traditional D1 density, grain yield, profit and PFPN were increased at D2 density and then kept stable at D3 density, NER was kept stable at D2 density and then decreased at D3 density. Based on the predicted maximum profit, the optimal combinations of N application and planting density were 199 kg ha(-1) and 81,081 plants ha(-1) in 2017, and 205 kg ha(-1) and 84,782 plants ha(-1) in 2018. The two optimal combinations had an increase of 17.6% for grain yield, 39.8% for PEPN, 3.6% for NRE than the traditional N3D1 treatment. Therefore, an appropriate combination of increased planting density with reduced N application could enhance profit and nitrogen use of summer maize in Huanghuaihai region of China.

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Genome-wide association screening and verification of potential genes associated with defoliation rate induced by defoliant in upland cotton

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INDUSTRIAL CROPS AND PRODUCTS 2024年 217卷

作者： Pan, Zhenyuan Zhou, Xiaofeng Wang, Runze Li, Juan Ding, Shugen Han, peng Wang, xuwen Zhao, Zhansheng Wu, Yuanlong Nie, Xinhui Yu, Yu Xinjiang Acad Agr & Reclamat Sci Shihezi 832000 Peoples R China Shihezi Univ Key Lab Oasis Ecol Agr Xinjiang Prod & Construct C Agr Coll Shihezi 832003 Peoples R China Agr Sci Res Inst Div Xinjiang Prod Construct Corps 6 Wujiaqu 835099 Peoples R China

Defoliant sensitivity is an important trait of machine-picked cotton that directly affects the defoliation efficiency and the quality of machine-picked cotton fibers. Identification of the genetic components underlying defoliant sensitivity in upland cotton (Gossypium hirsutum L.) is highly important. In this study, the defoliation rate (DR) of 328 re-sequenced upland cotton accessions after 5 days of defoliant treatment was evaluated at two locations for two years in four environments;the results showed a great variation among the accessions, and the phenotype were normally distributed. A genome-wide association study (GWAS) was subsequently performed with resequencing data and defoliation rate data. As a result, two quantitative trait loci (QTL) related to defoliation rate were identified, qDS-A05 and qDS-A06, among which, qDS-A06 was identified in three environments. By combining linkage disequilibrium (LD) analysis, haplotype analysis, and expression analysis, a key candidate gene for DR was identified in qDS-A06, which was named GhDS-A06. This gene encodes a carboxylate clamp (CC)-tetratricopeptide repeat (TPR) protein, and is likely involved in the development of the abscission zone according to the reference of the function of TPR proteins in tomato (Solanum lycopersicum) and Arabidopsis (Arabidopsis thaliana L.). Additionally, the favorable haplotype frequency of GhDS-A06 varied among diverse areas of cotton growing in China, and the favorable haplotype frequency in northwestern China was much greater than that in other regions, which suggested that the favorable haplotype GhDS-A06 was artificially selected during breeding for machine-harvested cotton in northwestern China. The findings in the study not only provide genetic insights into defoliant sensitivity in upland cotton but also offer an ideal target for molecular breeding of defoliant sensitivity improved machine-harvested cotton plants.

关键词： Machine-harvested cotton Defoliation rate Genome-wide association study Favorable allele

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Ce(Ⅲ) activates peroxymonosulfate for the degradation of substituted PAHs

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Chemosphere 2022年 306卷 135525页

作者： Chen, xuwen Wang, Peixin peng, Fei Zhou, Zhou Waigi, Michael Gatheru Ling, Wanting Institute of Organic Contaminant Control and Soil Remediation College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing210095 China

Substituted polycyclic aromatic hydrocarbons (SPAHs) are being intensively investigated, considering their high toxicity. Additionally, the mechanism of the effect of substituents on the removal of SPAHs and the activation of Ce(III) ions on peroxymonosulfate (PMS) have not been explored. Here we evaluated the removal efficiency of SPAHs in the oxidation system constructed by Ce(Ⅲ) ions and PMS, with emphasized the effect of substituents on SPAHs degradation. Ce(Ⅲ) has high catalytic performance for PMS, and the degradation percentage of all pollutants was higher than 92%. The significantly negative correlation between the reaction rate constants of SPAHs and the highest occupied molecular orbital-the lowest unoccupied molecular orbital gap, confirms that substituents lead to the differences in the degradation of SPAHs. The generation of reactive oxygen species (SO4•−, •OH, and 1O2) is based on the electron transfer between Ce(Ⅲ) and PMS, and the contribution of ROS to substituted naphthalene varies due to the role of substituents. The Ce(Ⅳ)/Ce(Ⅲ) cycle accelerates the activation of PMS. Based on the transformation products and condensed Fukui function, the possible degradation pathways are inferred. In addition, inorganic anions and organic matter have little effect on the Ce(Ⅲ)/PMS system, which is a prerequisite for applying this system to real-world waste-water for SPAHs removal. This work demonstrates a new model of the degradation mechanism of SPAHs in the Ce(Ⅲ)/PMS system. © 2022 Elsevier Ltd

关键词： Degradation

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BIAS CIRCUIT OF POWER AMPLIFIER, DEVICE AND EQUIPMENT

BIAS CIRCUIT OF POWER AMPLIFIER, DEVICE AND EQUIPMENT

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作者： Zhenfei peng Qiang SU xuwen NI

标准号: US20230006623(A1)

A bias circuit of a power amplifier includes a first part circuit, a second part circuit and a power supply, in which the power supply is connected with a power supply end of the first part circuit;two ends of the first part circuit are connected in parallel with two ends of the second part circuit, and after parallel connection one end of a parallel circuit is connected with a gate of the first transistor of the power amplifier in a signal amplification circuit;the first part circuit is configured to provide a first bias voltage, and the second part circuit is configured to provide a second bias voltage;the two bias voltages are superimposed to provide a stable bias voltage;and an impedance of the bias circuit is in a preset range of the impedance.

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The Modeling and Using Strategy for the Digital Twin in Process Planning

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IEEE ACCESS 2020年 8卷 41229-41245页

作者： Zhao, peng Liu, Jinfeng Jing, xuwen Tang, Mingming Sheng, Sushan Zhou, Honggen Liu, Xiaojun Jiangsu Univ Sci & Technol Dept Mech Engn Zhenjiang 212013 Jiangsu Peoples R China Southeast Univ Dept Mech Engn Nanjing Peoples R China

Process planning is the core of guiding process production and one of the most critical parts to realize intelligent manufacturing of products. In order to realize the monitoring, simulation, prediction and control of the physical space in the intelligent manufacturing mode, the digital twin technology is used to guide the process planning. This research describes a modeling method of digital twin process model (DTPM) for manufacturing process and the contents of DT data, discusses the acquisition method of real-time data and the management method of simulation data. Aiming at the data fusion between physical space and virtual space, a hierarchical model and mapping strategy for multi-source heterogeneous data in machining process are proposed to generate the DT data. Finally, the guidance and the visualization function in process planning of DTPM is analyzed, and the effectiveness of this method is verified by choosing the design process of a key component in a marine diesel engine.

关键词： Manufacturing Solid modeling Process planning Data models Three-dimensional displays Process design Digital twin DTPM process planning data perception simulation optimization

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HSP70和S100A9蛋白在脑胶质瘤组织中的表达及其意义

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现代医药卫生 2023年第23期39卷 4006-4009页

作者：廖秋林彭大云赖续文广东祈福医院广东广州511495 中国人民解放军南部战区总医院广东广州510010

目的探讨热休克蛋白70(HSP70)和S100钙离子结合蛋白A9(S100A9)在胶质瘤组织中的表达水平及在低级别脑胶质瘤与胚胎发育不良性神经上皮肿瘤(DNT)中的鉴别诊断价值。方法所有病理标本取自2015年1月至2020年12月广东祈福医院和南部战区... 详细信息

目的探讨热休克蛋白70(HSP70)和S100钙离子结合蛋白A9(S100A9)在胶质瘤组织中的表达水平及在低级别脑胶质瘤与胚胎发育不良性神经上皮肿瘤(DNT)中的鉴别诊断价值。方法所有病理标本取自2015年1月至2020年12月广东祈福医院和南部战区总医院确诊的160例胶质瘤初诊患者,其中世界卫生组织(WHO)Ⅰ、Ⅱ、Ⅲ、Ⅳ级胶质瘤患者均为40例。采用免疫组织化学法检测160例胶质瘤和肿瘤旁正常脑组织,以及20例DNT组织中HSP70和S100A9的表达水平。结果 HSP70和S100A9在160例胶质瘤组织中的阳性率分别为85.0%(136/160)和7.5%(12/160)。HSP70在不同WHO分级胶质瘤组织中的表达水平比较,差异有统计学意义(P<0.05),且表达水平随着胶质瘤WHO级别的增加而升高,也能用于低级别胶质瘤与DNT的鉴别诊断。S100A9在不同WHO分级胶质瘤的表达水平比较,差异无统计学意义(P>0.05),也不能用于DNT与低级别胶质瘤的鉴别诊断。HSP70与S100A9在脑胶质瘤组织中的表达无相关性。结论 HSP70可用于脑胶质瘤的诊断,表达水平随着胶质瘤WHO级别的增加而升高,且可用于DNT与低级别胶质瘤的鉴别诊断。S100A9无上述价值。

关键词：胶质瘤胚胎发育不良性神经上皮肿瘤热休克蛋白70 S100A9蛋白免疫组织化学

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A model for predicting high BMI of people living with HIV after receiving antiretroviral therapy

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THERAPEUTIC ADVANCES IN CHRONIC DISEASE 2022年第0期13卷 20406223221102750页

作者： Qian, Zhe Wu, Houji Wu, Yihua Liao, Wei Yu, Tao Xu, xuwen peng, Jie Cai, Shaohang Southern Med Univ Nanfang Hosp Dept Infect Dis 1838 Guangzhou Ave North Guangzhou 510515 Guangdong Peoples R China Sun Yat Sen Univ Canc Ctr Intens Care Unit Guangzhou Peoples R China

Objective: The objective of this study was to evaluate the characteristics of high body mass index (BMI) and normal weight people living with HIV after antiretroviral therapy (ART) and establish a model. Methods: A total of 290 people living with HIV after 1 year of ART treatment were enrolled and divided into two groups based on whether their BMI index was <24 or >= 24 at week 48. The demographic, clinical data were collected and analyzed. Multivariable logistic regression analysis was performed. A model was established and use to predict the occurrence of certain diseases. Results: A total of 290 people living with HIV were included in this study;200 had a normal BMI (BMI < 24) and 90 were high BMI (BMI >= 24) after 1-year ART. Their baseline characteristics were significantly different in relation to age (p = 0.007), sex distribution (p = 0.040), ART regimen (p = 0.040), alanine aminotransferase levels (p < 0.001), and three major serum lipid levels: triglycerides (p < 0.001), cholesterol (p = 0.011), and low-density lipoprotein (p = 0.005). A multivariate logistic regression analysis resulted in the development of a model for the diagnosis of high BMI and hyperlipidemia. The model score is an independent risk factor for hyperlipidemia (odds ratio = 2.674, p = 0.001) and high BMI (p < 0.001). The model score is significantly correlated with the controlled attenuation parameter (CAP) value (r = 0.230, p < 0.001) and can be used to divide the severity of liver steatosis based on CAP value. Conclusions: This study demonstrated a easy-to-use model to detect high BMI, hyperlipidemia, and liver steatosis in people living with HIV without risk factors for BMI changing at baseline after 1 year of ART treatment.

关键词： acquired immunodeficiency syndrome high BMI human immunodeficiency virus hyperlipidemia infection liver steatosis

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掘进机循环负压降尘装置参数优化研究

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矿业科学学报 2025年第2期10卷 271-284页

作者：邢旭文何少杰田园肖鹏武琨琪张英华张金宝滕胜杰庆阳新庄煤业有限公司新庄煤矿甘肃庆阳745000 北京科技大学资源与安全工程学院北京100083

有效开展掘进巷道工作面粉尘治理是确保井下作业安全的重要前提之一。针对高浓度粉尘环境中传统的喷雾降尘方式效率相对低下的问题,根据负压卷吸与喷雾降尘协同增效的理念研发一种应用于掘进机上的循环负压降尘装置。通过建立仿真模型... 详细信息

有效开展掘进巷道工作面粉尘治理是确保井下作业安全的重要前提之一。针对高浓度粉尘环境中传统的喷雾降尘方式效率相对低下的问题,根据负压卷吸与喷雾降尘协同增效的理念研发一种应用于掘进机上的循环负压降尘装置。通过建立仿真模型对射流卷吸机制的影响因素开展数值模拟,基于装置内外循环负压流场变化规律优化引射管形状、叶轮设置、文丘里管数量等参数,并采用相似实验的方式验证优化后装置的降尘效率。结果表明:在假设喷雾条件不变的情况下,当装置的引射管形状采用圆锥形、叶轮片数量为8片、叶轮转速为2400 r/min、文丘里管数量为10个、叶轮安装位置距引射管入口300 mm时,循环负压性能最为理想,其相似模型的降尘效率可达87.4%。

关键词：粉尘防治循环负压射流卷吸机制参数优化

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