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中国矿业 2024年第S02期33卷 369-374页

作者：朱伟朱绪文李悦李星张丽霞卫颖哲杨丽娜中煤科工生态环境科技有限公司北京100013 山东深博巷道支护技术有限公司山东济南250000

针对抚顺西露天矿矿坑内自燃灾害频发并因此导致环境污染和生产安全的问题,现场取煤炭、油母页岩、干馏后油母页岩三种样品进行了实验室工业分析和高温程序升温实验,分别得到了工业分析成果和自燃过程中析出气体规律及放热特性,研究了... 详细信息

针对抚顺西露天矿矿坑内自燃灾害频发并因此导致环境污染和生产安全的问题,现场取煤炭、油母页岩、干馏后油母页岩三种样品进行了实验室工业分析和高温程序升温实验,分别得到了工业分析成果和自燃过程中析出气体规律及放热特性,研究了矿物自燃机理,提出了露天矿自燃监测方法和适宜的防治技术措施。结果表明,煤样品挥发分最高,达到42%,而油母页岩和干馏残渣灰分均超过75%。孔径分布表明各矿物样品大孔和介孔占比很大,易发生氧气吸附作用,从表观结构特征解释了矿物易于氧化自燃的原因。各样品氧化升温过程中易于析出碳氧化合物和碳氢类化合物,气体的成分及浓度与温度密切相关。矿物氧化升温过程放出热量,助推自热进一步发展至自燃。露天矿自燃不仅造成生态环境影响,同时破坏优质煤炭资源,降低边坡强度,可能进一步引发滑坡等地质灾害。自燃监测方面,可采取红外热成像系统,辅助同位素测氡和钻孔测温相结合精准圈定高温自热区和自燃区,从而选取适宜的防治措施进行精准治理,有效地控制了矿坑内自燃的发展,对类似矿山自燃精准防治提供了参考经验。

关键词：抚顺西露天矿矿物自燃特性氧化析出气体监测防治

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南海西南次海盆深部结构研究进展与展望

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地质学报 2023年第8期97卷 2742-2755页

作者：秦绪文王利杰姚永坚李福元赵明辉张佳政王后金徐子英汪俊许鹤华路允乾张如伟张宝金中国地质调查局北京100037 中国地质调查局广州海洋地质调查局自然资源部海底矿产资源重点实验室广东广州511458 中国科学院南海海洋研究所边缘海与大洋地质重点实验室广东广州510301 南方海洋科学与工程广东省实验室(广州) 广东广州511458

西南次海盆位于南海渐进式扩张的西南端,共轭陆缘结构和残留扩张脊保留完整,是研究南海深部结构和动力学机制的关键区域。前期研究发现,西南次海盆洋陆过渡带较窄、同扩张断层发育、地震反射莫霍面不清晰、具有慢速扩张等特征。然而,由... 详细信息

西南次海盆位于南海渐进式扩张的西南端,共轭陆缘结构和残留扩张脊保留完整,是研究南海深部结构和动力学机制的关键区域。前期研究发现,西南次海盆洋陆过渡带较窄、同扩张断层发育、地震反射莫霍面不清晰、具有慢速扩张等特征。然而,由于不同探测方法获取的地壳结构具有多解性,使得西南次海盆洋陆转换过程、慢速扩张洋壳结构与增生模式以及龙门海山岩石性质与地幔成因机制等基础科学问题尚存争议。为此本文建议在西南次海盆开展地质取样获取海山岩石样品,确定其年龄与性质,分析扩张后海山形成的深部动力过程;并对关键构造部署高精度的地震反射/折射联合探测,结合岩石物理分析,对西南次海盆进行构造成像和物质组成参数正反演,以实现壳幔尺度的地震学透视,为探索西南次海盆洋陆转换过程和洋壳增生模式提供重要的证据,以丰富和完善南海的动力学演化模式。

关键词：深部结构洋陆转换带慢速扩张蛇纹石化地幔西南次海盆

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Investigation of fluoride and turbidity removal from coal mine water by combined micro-flocculation and membrane filtration: Lab to pilot scale

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Journal of Environmental Sciences 2025年

作者： Liping zhang Weiwei Wang Yiyun An Huaran Sun Eryong Wu xuwen He Siwei Peng Cun zhang School of Chemical and Environmental Engineering China University of Mining and Technology-Beijing Beijing 100083 China Datang Environmental Industry Group Co. Ltd Beijing 100097 China School of Mines Key Laboratory of Deep Coal Resource Ministry of Education of China China University of Mining & Technology Xuzhou Jiangsu 221116 China

The concentration of turbidity and fluoride in mine drainage exceeding the discharge standard, which impede coal mine water broader application. In this study, micro-flocculation, which was based on the fluoride removal agent (CFYJ-L) developed by our research group, was combined with direct filtration membrane (MFDMF) to remove the high concentrations of turbidity and fluoride. Firstly, we investigated the impacts of factors on fluoride, turbidity removal by the CFYJ-L, explored the mechanisms of fluoride removal and screened cleaning agents for membrane fouling. Findings indicate that the optimal process parameters were a dosage of 1.16 g/L, pH 6.11, stirring time 10.90 min, which would let F − concentration from 20 to 0.453 mg/L. Suspended solids (SS), Cl − , SO 4 2− and CO 3 2- all seems not reduced fluoride removal efficiency. The fluoride removal mechanism is primarily through electrostatic adsorption, ion exchange, complexation and hydrogen bonding, resulting in the formation of precipitates that remove fluoride. Meanwhile, the optimal process parameters for treating simulated fluorinated coal mine water with MFDMF process was an operating pressure of 0.2 MPa. Membrane fouling was mainly characterized by cake filtration, accompanied by pore clogging. The best cleaning agent for membrane fouling was 0.2 % HCl, which can increase the membrane flux recovery rate from 70 % to 91 %. A 90-day pilot site continuous operation demonstrated the stability of the MFDMF process, with a treatment cost was reduced from over 3.36 RMB/m 3 to 2.60 RMB/m 3 and land area reduction exceeding 40 % compared to existing process.

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槲皮苷通过调控转化生长因子-β/smads信号通路抑制结肠癌细胞迁移与侵袭

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中华实验外科杂志 2024年第7期41卷 1494-1497页

作者：李丹张宏博郝旭雯徐新生天津医科大学总医院中医科天津300052 天津市南开医院肿瘤科天津300102 天津市南开医院消化科天津300102 天津市南开医院外四科天津300102

目的探讨槲皮苷通过调控转化生长因子-β1(TGF-β1)/smads信号通路抑制结肠癌细胞迁移与侵袭。方法 HCT116结肠癌细胞分为对照组、槲皮苷低、中、高剂量组, 分别使用0、5、10、20 μmol/L槲皮苷处理48 h, 噻唑蓝(MTT)实验检测细胞活力,... 详细信息

目的探讨槲皮苷通过调控转化生长因子-β1(TGF-β1)/smads信号通路抑制结肠癌细胞迁移与侵袭。方法 HCT116结肠癌细胞分为对照组、槲皮苷低、中、高剂量组, 分别使用0、5、10、20 μmol/L槲皮苷处理48 h, 噻唑蓝(MTT)实验检测细胞活力, 迁移实验检测细胞迁移能力, Transwell实验检测细胞侵袭能力, 蛋白质印迹法(Western blot)检测基质金属蛋白酶-9(MMP-9)、基质金属蛋白酶抑制剂-1(TIMP-1)、波形蛋白(Vimentin)、E-钙黏蛋白(E-cadherin)、TGF-β1、p-Smad2及p-Samd3蛋白表达, 采用F检验分析组间差异。结果槲皮苷低、中、高剂量组细胞活力(0.48±0.01、0.41±0.01、0.34±0.01比0.54±0.02, F=26.354, P<0.05)、细胞迁移数目[(117.62±3.49)、(43.36±2.53)、(35.56±1.32)个比(176.48±9.35)个, F=35.624, P<0.05]、细胞侵袭数目[(86.31±3.83)、(41.28±2.26)、(30.41±1.26)个比(182.43±9.21)个, F=36.520, P<0.05]、MMP-9 (0.98±0.05、0.46±0.02、0.32±0.01比0.35±0.01, F=26.546, P<0.05)、Vimentin (0.53±0.03、0.41±0.03、0.20±0.01比0.08±0.00、F=27.649, P<0.05)、TGF-β1(0.82±0.05、0.74±0.04、0.70±0.04比0.35±0.01, F=30.325, P<0.05)、p-Smad2(1.78±0.09、1.56±0.10、0.84±0.05比0.41±0.03, F=33.654, P<0.05)及p-Smad3蛋白表达量(1.94±0.12、0.87±0.07、0.56±0.04比0.28±0.01, F=35.674, P<0.05)低于对照组, 槲皮苷低、中、高剂量组中TIMP-1(0.21±0.01、0.31±0.02、0.46±0.03比0.64±0.04, F=28.413, P<0.05)、E-cadherin蛋白表达量(0.09±0.00、0.22±0.01、0.43±0.02比0.89±0.07, F=28.561, P<0.05)高于对照组。结论槲皮苷能抑制HCT116细胞迁移及侵袭, 可能与抑制TGF-β1/smad2/3信号通路有关。

关键词：槲皮苷结肠癌迁移侵袭转化生长因子-β1/smads信号通路

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PCSK9 is upregulated and correlated with more severe disease condition but fails to predict treatment outcomes in psoriasis patients

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The Journal of dermatological treatment 2025年第1期36卷 2482867页

作者： xuwen Yin Lei Shi Ni zhang Heng Li Jianwen Long Xinjian Yu Dermatological Department Hubei Provincial Hospital of Traditional Chinese Medicine Wuhan China. Dermatological Department Huping Municipal Hospital of Traditional Chinese Medicine Huping China.

BACKGROUND:Proprotein Convertase Subtilisin/Kexin Type 9 (PCSK9) not only regulates cholesterol metabolism and cardiovascular disorder but also modifies inflammatory response and autoimmunity. OBJECTIVE:This study investigated the relation of PCSK9 to clinical features and treatment outcomes in psoriasis patients. METHODS:One hundred and five psoriasis patients who initiated systemic treatment due to moderate-to-severe disease condition were enrolled. Baseline characteristics and treatment response after 12-week treatment were collected. Their serum samples before treatment initiation were collected and sent to PCSK9 detection by enzyme-linked immunosorbent assay. Serum PCSK9 was also detected in 30 healthy subjects. RESULTS:PCSK9 level was 2-fold times in psoriasis patients healthy subjects. PCSK9 could predict psoriasis risk with AUC of 0.777. By optimum cutoff value of 179 ng/ml, PCSK9 had the best predictive potential for psoriasis risk. PCSK9 quartile was positively correlated with BMI, hyperlipemia history, PASI, and sPGA. However, PCSK9 quartile was not correlated with PASI 75 response, PASI 90 response, or sPGA 0/1 response at week 12. CONCLUSION:PCSK9 is upregulated and correlated with severe disease condition, but fails to predict treatment outcomes in psoriasis patients.

关键词： PCSK9 aberrant level clinical features psoriasis treatment outcomes

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Magnetic Flocculation Treatment of Coal Mine Water and a Comparison of Water Quality Prediction Algorithms

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MINE WATER AND THE ENVIRONMENT 2019年第2期38卷 391-401页

作者： zhang, Xiaohang He, xuwen Wei, Ming Li, Fuqin Hou, Pin zhang, Chunhui China Univ Min & Technol Beijing Sch Chem & Environm Engn Xueyuan Rd Beijing 100083 Peoples R China Hebei Vocat Coll Polit & Law Party Comm 569 North Friendship St Shijiazhuang 050061 Hebei Peoples R China Hebei Univ Engn 199 Guangming Nan Str Handan City 056038 Hebei Peoples R China

In this study, laboratory-scale magnetic flocculation systems were set up and the optimal coagulant and flocculent dosage, magnetic seed immersion, pH, stirring intensity, and precipitation time were all evaluated. A total of 729 expansion reaction conditions were generated, and 700 of the expansion reaction conditions were used to train a back-propagation neural network (BPNN) and general regression neural network (GRNN). The other 29 conditions were used to verify the networks' regression ability. The optimum coagulant was poly-aluminum chloride at a dosage of 100mg/L;the optimum flocculent was anionic polyacrylamide at a dosage of 4mg/L;the optimum size of the magnetic seed was 200 mesh at a dosage of 1g/L;and the optimum stirring intensities were 300 r/min for the coagulation tank, 200 r/min for the mixing tank, and 100 r/min for the flocculation tank. Comparing BPNN and GRNN, the GRNN's regression performance better matched the relationship between the reaction conditions and results. ZusammenfassungIn dieser Studie wurden magnetische Flockungssysteme im Laborma ss stab eingerichtet. Als Prufbedingungen wurden die Dosierung des Fallungs-mittels, des Flockungsmittels, der pH-Wert der Losung mit den magnetischen Tragerpartikeln, die Ruhrintensitat und die Fallungszeit ausgewahlt. Basierend auf einzelnen Werten dieser Prufbedingungen wurden insgesamt 729 Versuchsbedingungen erzeugt. Fur das Training der Neuronalen Netze (Fehlerfortpflanzungsnetzwerk - BPNN und Regressionsnot signnetzwerk - GRNN) wurden 700 Versuchsbedingungen verwendet. Die ubrigen 29 Versuchsbedingungen wurden zur uberprufung der Eignung der neuronalen Netze genutzt. Folgende optimale Werte der Prufparameter wurden ermittelt: Polyaluminiumchlorid (PAC) als Fallungsmittel mit einer Dosierung von 100 mg/L;anionische Polyacrylamide (PAM) als Flockungsmittel mit einer Dosierung von 4 mg/L;eine Gitterweite von 200 Maschen fur die magnetischen Tragerpartikel und einer Dosierung von 1 g/L sowie eine Ruh

关键词： Magnetic seed Back-propagation neural network General Regression Neural Network Regression ability

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Effect of pre-coagulation on catalytic ozonation in the tertiary treatment of coking wastewater: Kinetic and ozone consumption analysis

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JOURNAL OF WATER PROCESS ENGINEERING 2022年 48卷

作者： Wang, Hao zhang, Siyu He, Can Yuan, Run Wu, Xu Guo, Shaoqing He, xuwen Van Hulle, Stijn W. H. China Univ Min & Technol Beijing Sch Chem & Environm Engn Beijing 100083 Peoples R China Univ Ghent Dept Green Chem & Technol LIWET Campus KortrijkGraaf Karel De Goedelaan 5 B-8500 Kortrijk Belgium Katholieke Univ Leuven Dept Chem Engn PET Lab J De Nayerlaan 5 B-2860 St Katelijne Waver Belgium

The ozone-based advanced oxidation process in wastewater effluent degrades refractory organics efficiently and significantly. Nevertheless, high energy consumption is a challenge that hinders its widespread application. In this work, the pre-coagulation enhanced catalytic ozonation process for the treatment of biologically treated coking wastewater (BTCW) was investigated. The chemical oxygen demand (COD) removal results indicated that catalytic ozonation has an inadequate removal effect on the organic pollutants in BTCW. Moreover, the two-stage degradation occurred in the COD ozonation process, of which the slow reaction rate in the second stage was the main reason that limited its overall effect. The pre-coagulation overcame the obstacle of the limited effect of catalytic ozonation treatment of BTCW because of its ability to remove hydrophobic organics. The combination of pre-coagulation with catalytic ozonation could increase the COD removal efficiency from 45% to 69% compared with catalytic ozonation alone. There was a linear relationship between specific ozone consumption and ozone dosage regardless of whether BTCW was subjected to pre-coagulation. The fact that the slope of this linear relationship with pre-coagulation was much smaller than that without pre-coagulation. It indicates that pre-coagulation could significantly reduce ozone consumption. The primary role of pre-coagulation was to reduce ozone consumption considerably in the second stage of the ozonation process. The ozone consumption per unit mass of COD in the second stage reached 24.3 gO(3)/gCOD without pre-coagulation, while that was only 6.8 gO(3)/gCOD with pre-coagulation.

关键词： Coking wastewater Catalytic ozonation Pre-coagulation Kinetic model Consumption analysis

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Application of Cu²⁺-based electron spin resonance spectroscopy in measurement of antioxidant capacity of fruits

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ANALYTICAL AND BIOANALYTICAL CHEMISTRY 2019年第25期411卷 6677-6686页

作者： Tian, Sizhu Li, xuwen Jiang, Jia Wang, Kun zhang, Hanqi Yu, Aimin zhang, Ziwei Jilin Univ Coll Chem Qianjin St 2699 Changchun 130012 Jilin Peoples R China

The antioxidant capacity of 22 kinds of fruits was measured by the developed electron spin resonance (ESR) method based on Cu2+ sensor. Cu2+ is reduced to Cu+ by the antioxidants in the fruits, and the remaining Cu2+ was determined by ESR and UV-Vis spectroscopy. Cu2+ can give an ESR signal whereas Cu+ cannot, and the loss of the ESR signal was used to quantify the antioxidant capacity of various fruits. The results were shown as vitamin C equivalent antioxidant capacity (VCEAC). The VCEAC values obtained by ESR and UV-Vis methods ranged from 24.23 to 688.61 mg/100 g and from 24.12 to 677.79 mg/100 g, respectively. Cupric ion reducing antioxidant capacity (CUPRAC) and 1,1-diphenyl-2-picryl-hydrazyl (DPPH) methods were employed for comparison. Based on Pearson's correlation test, the results obtained by CUPRAC and DPPH methods were both significantly correlated with these obtained by the present method, which indicated that the novel method was reliable. Total phenolic content for all kinds of fruits was measured with the Folin-Ciocalteu reagent, and VCEAC values obtained by the ESR method were significantly correlated with total phenolic contents.

关键词： Electron spin resonance Cu2+ reduction Fruits Antioxidant capacity VCEAC Total phenolic content

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CHANGES IN GAUSSIAN MODELING PARAMETERS OF PPG PULSE DURING HEALTHY PREGNANCY

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JOURNAL OF MECHANICS IN MEDICINE AND BIOLOGY 2021年第5期21卷 2140001-2140001页

作者： Meng, Yu Yang, Lin zhang, Song Wu, Guanghui Liu, Xiaohong Hao, Dongmei Yang, Yimin Li, xuwen Beijing Univ Technol Fac Environm & Life Beijing 100024 Peoples R China Capital Med Univ Beijing Anzhen Hosp Beijing Inst Heart Lung & Blood Vessel Dis Beijing 100029 Peoples R China Beijing Yes Med Devices Co Ltd Beijing 100152 Peoples R China

We used Gaussian modeling to depict the changes in finger photoplethysmographic (PPG) pulse during pregnancy in healthy women. We enrolled 70 healthy pregnant women and recorded their PPG pulses in 11-13 gestational weeks, 20-22 gestational weeks, and 37-39 gestational weeks. Three independent positive Gaussian functions were utilized to decompose the pulses, and each Gaussian function extracted three key parameters: the peak amplitude (H), the peak position (T), and the half-width (W). The method of ANOVA and post-hoc multiple comparisons of mathematical statistics were utilized to study the differences of these parameters between the three trimesters. We found that in the first trimester H-1 increased significantly (H-1 : 49.7 +/- 10.3 versus 52.9 +/- 6.9, p < 0.05). T-2 and T-3 increased in the first trimester (T-2 : 28.1 +/- 2.8 versus 28.4 +/- 2.2, p > 0.05;T-3: 54.3 +/- 4.2 versus 56.3 +/- 4.3, p < 0.01), then decreased significantly (T-2 : 28.4 +/- 2.2 versus 27.3 +/- 2.2, T-3: 56.3 +/- 4.3 versus 54.7 +/- 5.2, p < 0.05). H-1 is associated with cardiac output, and T-2 and T-3 are associated with peripheral vascular resistance. The results of this study were consistent with the conclusion that healthy pregnant women exhibited high flow state of the cardiovascular system and their peripheral vascular resistance decreased first and then gradually recovered during pregnancy. This study indicated that PPG pulse could also reflect the changes in the maternal cardiovascular system during pregnancy.

关键词： PPG pulse healthy pregnant women Gaussian modeling parameters

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Study on chemical constituents and biological activities of Sanghuangporus vaninii under static magnetic field

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分子科学学报 2024年第4期40卷 353-357页

作者： LIU xuwen ZHOU Jie YE Dongyan LI Qianhui YIN Shuren zhang Suyi BAI Helong College of Chemistry Changchun Normal UniversityChangchun 130032China

The chemical composition and biological activity of Sanghuangporus vaninii solid culture treated by static magnetic field were *** compounds were isolated and purified using ultrasonic extraction and semi-preparative liquid *** structures were identified through spectral data,and the inhibitory activities againstα-amylase,α-glucosidase and pancreatic lipase were *** compounds,5,7-dihydroxy-3,4'-dimethoxyflavone(1),D-(+)-Trehalose(2),pinolenic acid(3),were extracted from the petroleum ether *** of peak heights indicated a significantly higher content of compounds subjected to a 4 mT static magnetic field compared to those *** tests revealed that compounds 1 and 2 exhibited strong anti-α-amylase and anti-α-glucosidase ***,compound 1 had inhibition rates of(65.37±0.05)%and(73.81±0.12)%after 4 mT treatment,compared to(57.26±0.11)%and(65.33±0.14)%*** 2 showed inhibition rates of(68.61±0.12)%and(65.38±0.09)%with the magnetic field,versus(60.71±0.06)%and(56.18±0.02)%*** 3 displayed a notable inhibitory effect on pancreatic lipase,with rates of(60.83±0.03)%after 4 mT treatment and(53.77±0.09)%*** study demonstrates that the static magnetic field enhances the chemical content and bioactivity of Sanghuangporus vaninii solid culture,providing a basis for its further development and application.

关键词： Sanghuangporus vaninii chemical component static magnetic field α-amylase α-glucosidase pancreatic lipase

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