检索结果-南通市图书馆

EDTA interfacial chelation Ca^(2+) incorporates superhydrophobic coating for scaling inhibition of CaCO_(3) in petroleum industry

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2021年第3期18卷 951-961页

作者： ming-Liang Zhu Hui-Juan Qian Rui-xia Yuan Dong-Yan Zhao Hai-Chao huang Huai-Yuan Wang College of Chemistry and Chemical Engineering Northeast Petroleum UniversityDaqing 163318China College of Chemical Engineering Daqing Normal UniversityDaqing 163712China Beijing Smart-Chip Microelectronics Technology Co. LtdBeijing 102200China

In this paper,the superhydrophobic poly(vinylidene fuoride)/fuorinated ethylene propylene/SiO_(2)/CNTs-EDTA(PFSCEDTA)composite coating was successfully fabricated and applied for anti-scaling *** deposition of CaCO_(3) on the surface of the superhydrophobic PFSC-EDTA composite coating reached 0.0444 mg/cm^(2) for 192-h immersion into the supersaturated CaCO_(3) solution,which was only 11.4%that of the superhydrophobic PFSC composite *** the interface between the CaCO_(3) solution and the PFSC-EDTA coating,the Ca^(2+)could be frstly chelated by EDTA that was beneft for improving the anti-scaling performance of the superhydrophobic PFSC-EDTA composite *** another hand,the addition of EDTA to the CNTs played an important role in fabricating the SiO_(2)-centric and CNTs-EDTA-surrounded multilevel micro-nanostructure in the superhydrophobic PFSC-EDTA composite coating,in favor of maintaining the air flm under the water and the stability of the superhydrophobic *** research supplies a new way of improving antiscaling performance of superhydrophobic coating by incorporating the organic chelating agent at the interface and changing the traditional way of scale prevention.

关键词： Anti-scaling Superhydrophobic coating EDTA Poly(vinylidene fuoride) Carbon nanotubes

Emodin and baicalein inhibit pancreatic stromal derived factor-1 expression in rats with acute pancreatitis

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2009年第2期8卷 201-208页

作者： Li, Zong-Fang xia, xian-ming huang, Chen Zhang, Shu Zhang, Jian Zhang, Ai-Jun Xi An Jiao Tong Univ Sch Med Affiliated Hosp 2 Dept Surg Xian 710004 Peoples R China Xi An Jiao Tong Univ Minist Educ Key Lab Environm & Genes Related Dis Xian 710004 Peoples R China Wannan Med Coll Yijishan Hosp Dept Surg Wuhu 241001 Peoples R China

BACKGROUND: Stromal derived factor-1 (SDF-1) is an efficacious leukocyte chemoattractant, which can attract lymphocytes and mononuclear cells from bloodstream into the site of inflammation. Emodin., an anthraquinone derivative from Radix et Rhizoma Rhei, and baicalein, a flavone from Scutellaria baicalensis Georgi, both have been reported to possess anti-inflammatory activities. The expression pattern of SDF-1 in experimental acute pancreatitis (AP) and the effect of emodin or baicalein on that are not well defined. The present study aimed to investigate the effects of emodin and baicalein on pancreatic myeloperoxidase (MPO) activity (reflecting leukocyte sequestration) and cytokine production, as well as tissue SDF-1 expression in the setting of AP. METHODS: A :rat model of AP was induced by administration (of 5% sodium taurocholate through the biliopancreatic duct. The level of tumor necrosis factor-a (TNF-alpha), interleukin-6 (IL-6) and MPO in the pancreas, and serum amylase were tested by immunohistochemistry, ELISA and chromatometry. The expressions of SDF-1 alpha and SDF-1 beta were detected by real-time PCR, Western blotting, and immunohistochemistry. RESULT: Combination of emodin and baicalein significantly reduced pancreatic TNIP-alpha, IL-6 and MPO, and also inhibited pancreatic SDF-1 expression. CONCLUSIONS: The inhibition of SDF-1 expression by emodin and baicalein might contribute, in part at least, to the amelioration of pancreatic inflammation. The present study also shows benefits of simultaneous treatment of AP.

关键词： acute pancreatitis stromal derived factor-1 myeloperoxidase traditional Chinese medicine

Cytotoxicity and DNA Damage Effect of TGA-capped CdTe Quantum Dots

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2012年第2期28卷 276-281页

作者： LI Yan-bo ZHANG Hai-xia GUO Cai-xia HU Gui-qin DU Hai-ying JIN ming-hua huang Pei-li SUN Zhi-wei YANG Wen-sheng School of Public Health and Family Medicine Capital Medical UniversityBeijing 100069P.R.China Public Health Institute Beijing Chaoyang District Centre for Disease Control and PreventionBeijing 100021P R.China School of Public Health Jilin UniversityChangchun 130021P.R.China Key Laboratory of Surface and Interface Chemistry of Jilin Province College of ChemistryJilin UniversityChangchun 130012P.R.China

The cytotoxicity and DNA damage caused by thioglycolic acid（TGA）-capped cadmium telluride（CdTe） quantum dots（QDs） to hepatocyte line HL-7702 were *** viability was measured by 3-（4,5-dimethylthiazol-2-yl）-2,5-diphenyltetrazolium bromide（MTT） assay;DNA damage was detected by single cell gel electrophoresis（SCGE）;the change of cell cycle progression was examined by propidium iodide（PI）-flow cytometry（FCM）;apoptosis was measured by acridine orange/ethidium bromide（AO/EB） assay and Annexin V-FITC/PI-FCM（FITC：fluorescein isothiocyanate）.The results show that the cytotoxicity induced by CdTe QDs was increased in a dose-dependent and time-dependent manner;after exposure to QDs for 24 h,as the exposure dose increased,the rate of DNA damage was significantly increased（P0.05）,and the degree of DNA damage was *** the dose of CdTe QDs increased,the percentage of G 0 /G 1 phase cells was significantly decreased（P0.001）,while the percenttages of S and G 2 /M phases cells were significantly increased（P0.001）.In AO/EB assay,apoptotic cells could be observed under a fluorescence microscope,and apoptotic rate was increased as exposure dose *** Annexin V-FITC/PI-FCM assay,the apoptotic rates of CdTe QDs treated groups were significantly increased compared with that of control group（P0.05）.Our studies indicate that CdTe QDs could influence cell viability,and induce DNA damage,the S and G2 /M phases arrest and apoptosis of HL-7702.

关键词： Apoptosis CdTe quantum dot(QD) Cell cycle Cell viability DNA damage

胚胎移植患者饮水量对膀胱充盈时间影响的生存分析研究:一项随机对照试验

在线全文

学校读者我要写书评

暂无评论

中华生殖与避孕杂志 2024年第5期44卷 505-509页

作者：夏美玲唐纯芳汪雅琴罗铭陈妙虹钟玲玲黄莉张曦倩翁慧男张茂玲广东省妇幼保健院生殖健康与不孕症科广州511400

目的探讨饮水量对胚胎移植患者术前膀胱充盈时间的影响。方法收集2023年2月至6月期间于广东省妇幼保健院生殖健康与不孕症科拟行体外受精-胚胎移植的患者189例。运用随机数字表将患者随机分为A、B、C 3组,各组样本量依次为61例、64例和6... 详细信息

目的探讨饮水量对胚胎移植患者术前膀胱充盈时间的影响。方法收集2023年2月至6月期间于广东省妇幼保健院生殖健康与不孕症科拟行体外受精-胚胎移植的患者189例。运用随机数字表将患者随机分为A、B、C 3组,各组样本量依次为61例、64例和64例,分别给予术前饮水300 mL、500 mL和700 mL。于饮水后45 min开始,每15 min进行腹部超声监测,共1~5次,记录膀胱充盈时间和膀胱容量。采用Kaplan-Meier法比较3组患者膀胱充盈时间的差异,并采用多因素Cox回归分析膀胱充盈时间的影响因素。结果A、B、C组患者饮水后105 min累积膀胱充盈率分别为57.4%(35/61)、90.6%(58/64)和98.4%(63/64),膀胱充盈中位生存时间(95%CI)为105.0(89.9~120.1)min、60.0(55.4~64.7)min和60.0(55.4~64.6)min。Kaplan-Meier成对比较结果显示,A组膀胱充盈时间长于B组和C组(均P0.05)。按年龄分层分析结果显示,低龄层(0.05);高龄层(≥35岁)患者膀胱充盈中位生存时间A组与B组之间差异无统计学意义(P>0.05),C组[60.0(59.1~70.9)min]短于A组(105.0 min,P<0.001)和B组[75.0(64.3~85.7)min,P=0.027]。多因素Cox回归分析结果显示,以A组为参考类别,B、C组的风险比(hazard ratio,HR)分别为2.71、3.23,95%CI分别为1.78~4.21、2.10~4.96,均P<0.001;高龄HR为0.69,95%CI为0.49~0.99,P=0.044。结论饮水量和年龄为胚胎移植患者膀胱充盈时间的独立影响因素。胚胎移植患者宜术前75 min饮水500 mL,并对高龄患者适当增加饮水量或延长饮水后膀胱准备时间。

关键词：胚胎移植生殖技术,辅助超声饮水量膀胱

Hierarchical Crystalline Structures Induced by Temperature Profile in HDPE Bars during Melt Penetration Process

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2017年第1期35卷 108-122页

作者： chun-xia zhu rui-yan zhang yan-hao huang wei yang zheng-ying liu jian-ming feng 杨鸣波 College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China

The hierarchical crystalline morphologies and orientation structures across the thickness direction in high-density polyethylene （HDPE） molded bars were investigated via a novel melt-penetrating processing method named multi-melt multi-injection molding （M3IM）. The samples with various mold temperatures （20, 40 and 60 ℃） were prepared, and the effects of the external temperature profile on the evolution of crystalline microstructures were studied. With scanning electron microscopy （SEM）, the transition of crystalline morphology from ring-banded structure to oriented lamellae was observed with decreasing mold temperature, and the oriented lamellae were formed at the sub-skin layer of the samples at the lowest mold temperature, which was further testified by differential scanning calorimetry （DSC）. With the decline of mold temperature, the degree of orientation, obtained from two-dimensional small angle X-ray scattering （2D-SAXS）, was increased and long periods rose a little. Thus, decreasing mold temperature was beneficial to the formation of orientation structures because the relaxation of chains was weakened.

关键词： Hierarchical structures Orientation Multi-melt multi-injection molding Mold temperature

功能性不射精症行为治疗模式探索及疗效影响因素分析

在线全文

学校读者我要写书评

暂无评论

中华男科学杂志 2024年第3期30卷 224-228页

作者：范宇平黄文强刘斌雅马萌萌黄媚媛郑锦霞滕晓明同济大学附属第一妇婴保健院生殖医学中心

目的:回顾性分析门诊主诉为性行为不射精、但自慰可射精的功能性不射精患者，观察自慰方式改变结合性行为过程中增加视听刺激的改良行为治疗模式对功能性不射精症的疗效，并分析功能性不射精行为治疗的影响因素。方法:选择2019年8月至2... 详细信息

目的:回顾性分析门诊主诉为性行为不射精、但自慰可射精的功能性不射精患者，观察自慰方式改变结合性行为过程中增加视听刺激的改良行为治疗模式对功能性不射精症的疗效，并分析功能性不射精行为治疗的影响因素。方法:选择2019年8月至2021年5月在上海市第一妇婴保健院男科门诊就诊的功能性不射精患者，按行为治疗改良前后分为两组，比较两组患者的疗效差异，研究行为治疗模式改良疗效。研究年龄、禁欲时间变化病程、性行为前禁欲时间、有否采用视听刺激及体位改变、双侧睾丸大小均值以及生殖激素水平，与功能性不射精行为治疗结果的相关性。结果:完成治疗患者共计59例，治疗后性行为中成功射精≥1次的患者有22例(37.29%)。其中改良前行为治疗39例，在治疗后性行为中成功射精≥1次的患者11例(28.21%),改良行为治疗20例，在治疗后性行为中成功射精≥1次的患者11例(55.00%)。改良行为治疗和改良前行为治疗患者的有效率呈现显著差异(P<0.05)。在行为治疗的多个模式中，通过站立位自慰和性行为完成射精的行为治疗模式及行为治疗过程中自慰频率降低与功能性不射精症治疗疗效相关(P<0.05)。结论:采用改良行为治疗模式对功能性不射精患者有一定治疗效果。针对不射精针的先前事件是功能性不射精症行为治疗的关键，因此进一步探索更有效的行为治疗模式将成为功能性不射精行为治疗的发展方向。

关键词：不射精症自慰行为疗法视听刺激

Thermal recovery process of a backfilled open-pit in permafrost area at the Gulian strip coal mine in Northeast China

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Mountain Science 2017年第11期14卷 2212-2229页

作者： GAO Shu-hui HE Rui-xia JIN Hui-jun huang Ya-dong ZHANG Jian-ming LUO Dong-liang State Key Laboratory of Frozen Soils Engineering Northwest Institute of Eco-environment and Resources Chinese Academy of Sciences University of Chinese Academy of Sciences School of Civil Engineering Harbin Institute of Technology

Timely and proper backfilling of open-pits in strip coal-mines has been an effective measurement for the recovery of the hydrothermal regimes and ecological environment in permafrost regions. In this study, numerical simulations and statistical regressions were applied for analyzing the recovery processes of the backfill and its major influencing factors for the thermal equilibrium in recently backfilled open pits at the Gulian strip coalmine in Mo'he, Northeast China. Results show that the thermal recovery time of backfilled areas is positively correlated to the backfill depth(BD) of the soils, the backfilled soil temperature(BST), and the mean annual ground surface temperature(MAGST); meanwhile, climate warming can impact on thermal regimes of the backfill area. The impact of climate warming on ground temperature of the backfill will show up significantly in about 50 years afterbackfilling(BD at 10.0 and 20.0 m, BST at 20.0°C) under the climate warming scenario(CWS) of 0.025°C·year ^(-1). Grey-relation analyses show that the sensitivity of the backfill recovery time declines in the order of the BD, BST and MAGST. On the basis of the abovementioned studies, the layer-by-layer backfilling in cold seasons is advised for more effective and more rapid recovery of thermal regimes of the backfilled open-pits in cold regions.

关键词： Coal-mine open-pit backfill Numericalsimulation Thermal recovery process Sensitivityanalysis Gulian strip coal mine

Induction of apoptosis and cell cycle arrest in human HCC MHCC97H cells with Chrysanthemum indicum extract

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2009年第36期15卷 4538-4546页

作者： Zong-Fang Li Zhi-Dong Wang Yuan-Yuan Ji Shu Zhang Chen huang Jun Li xian-ming xia Department of General Surgery The Second Affiliated Hospital School of Medicine Xi'an Jiaotong University Xi'an 710004 Shaanxi Province China Scientific Research and Experiment Center The Second Affiliated Hospital School of Medicine Xi'an Jiaotong University Xi'an 710004 Shaanxi Province China Key Laboratory of Environment and Genes Related to Diseases of the Education Ministry School of Medicine Xi'an Jiaotong University Xi'an710061 Shaanxi Province China

AIM： To investigate the effects of Chrysanthemum indicum extract （CIE） on inhibition of proliferation and on apoptosis, and the underlying mechanisms, in a human hepatocellular carcinoma （HCC） MHCC97H cell line. METHODS： Viable rat hepatocytes and human endothelial ECV304 cells were examined by trypan blue exclusion and MTT assay, respectively, as normal controls. The proliferation of MHCC97H cells was determined by MTT assay. The cellular morphology of MHCC97H cells was observed by phase contrast microscopy. Flow cytometry was performed to analyze cell apoptosis with annexin V/propidium iodide （PI）, mitochondrial membrane potential with rhodamine 123 and cell cycle with PI in MHCC97H cells. Apoptotic proteins such as cytochrome C, caspase-9, caspase-3 and cell cycle proteins, including P21 and CDK4, were measured by Western blotting. RESULTS： CIE inhibited proliferation of MHCC97H cells in a timeand dose-dependent manner without cytotoxicity in rat hepatocytes and human endothelial ceils. CIE induced apoptosis of MHCC97H cells in a concentration-dependent manner, as determined by flow cytometry. The apoptosis was accompanied by a decrease in mitochondrial membrane potential, release of cytochrome C and activation of caspase-9 and caspase-3. CIE arrested the cell cycle in the S phase by increasing P21 and decreasing CDK4 protein expression. CONCLUSION： CIE exerted a significant apoptotic effect through a mitochondrial pathway and arrested the cell cycle by regulation of cell cycle-related proteins in MHCC97H cells without an effect on normal cells. The cancer-specific selectivity shown in this study suggests that the plant extract could be a promising novel treatment for human cancer.

关键词： Apoptosis Cell cycle Chinese traditionalmedicine Chrysanthemum indicum Hepatocellularcarcinoma Herbal medicine

稻油系统周年产量差及形成因素探究: 以湖北省武穴市为例

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

作物学报 2024年第5期50卷 1287-1299页

作者：曹馨元杜明利王宇诚陈欣华陈佳欣凌霄霞黄见良彭少兵邓南燕作物遗传改良全国重点实验室/农业农村部长江中游作物生理生态与耕作重点实验室/湖北洪山实验室/华中农业大学植物科学技术学院湖北武汉430070

明确农户水平稻油系统的产量差及进一步增产的限制因素对保障我国粮油安全具有重要作用。本研究以我国典型稻油系统生产区湖北省武穴市为研究对象,采用作物模型与田间调查相结合的方法评估了该地区稻油系统周年产量差,并使用单因素方差... 详细信息

明确农户水平稻油系统的产量差及进一步增产的限制因素对保障我国粮油安全具有重要作用。本研究以我国典型稻油系统生产区湖北省武穴市为研究对象,采用作物模型与田间调查相结合的方法评估了该地区稻油系统周年产量差,并使用单因素方差分析和条件推断树综合比较了农户在土壤条件和管理措施上的差异,以探究该地区限制稻油系统产量进一步增长的主要栽培因素及可行的增产途径,为因地制宜地缩小产量差提供新思路。结果表明:(1)武穴市水稻季和油菜季的潜在产量分别为11.79 t hm^(-2)和4.43 t hm^(-2),按照水稻和油菜籽粒的能量当量换算系统周年能量后,稻油系统的最高周年潜在能量为284 GJ hm^(-2)。水稻季和油菜季的平均实际产量分别为8.11 t hm^(-2)和1.82 t hm^(-2),系统平均实际周年能量为165 GJ hm^(-2)。该地区稻油系统的平均周年相对产量差(产量差与潜在产量的比值)为42%,其中油菜季(59%)比水稻季(31%)具有更大的产量提升空间。相较于湖北省和长江流域的平均水平,武穴市稻油系统周年潜在能量相近,而周年实际能量分别低13%和5%,导致该地区的产量差相对较大,其中分别有83%和61%的农户相对产量差大于湖北省和长江流域平均水平。(2)该地区周年产量较低的农户具有以下主要特征:土壤为沙壤土,耕层较浅;水稻季虫草害防治效果差,水稻季肥料做底肥一次施用且轻施氮、钾肥;油菜季重施肥料,且油菜机收损失较大。(3)武穴市89%的农户选择种植常规稻品种黄华占,其实际产量已达到该品种潜在产量的90%左右;种植油菜品种的种类较多且产量差异较大。综上,武穴市稻油系统仍具有较大的增产空间;缩小当地稻油系统产量差的技术措施包括:适当深耕提高土壤生产力;油菜季选择当地适宜的高产油菜品种;水稻季加强推广高产优质杂交稻品种,重点关注增加水稻用种量,提高直播密度和播种时的封闭除草,系统周年施肥管理上应降低油菜季而提高水稻季的肥料用量,水稻季仅施底肥的农户适当增施追肥等。

关键词：产量差田间调查稻油系统作物模型管理措施