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生物质炭对敌草隆在土壤中的慢吸附及其对解吸行为的影响 被引量:16
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作者 余向阳 王冬兰 +1 位作者 母昌立 刘贤进 《江苏农业学报》 CSCD 北大核心 2011年第5期1011-1015,共5页
由生物质高温厌氧热解制备的生物质炭作为一种高效多功能的土壤改良物质近年来逐渐受到关注,生物质炭施入土壤对农药等污染物的吸附隔离可有效降低农药的生物有效性和移动性。为探讨生物质炭对农药吸附的时间动态过程及其对解吸行为的影... 由生物质高温厌氧热解制备的生物质炭作为一种高效多功能的土壤改良物质近年来逐渐受到关注,生物质炭施入土壤对农药等污染物的吸附隔离可有效降低农药的生物有效性和移动性。为探讨生物质炭对农药吸附的时间动态过程及其对解吸行为的影响,采用室内模拟试验,测定农药敌草隆在添加不同含量生物质炭的土壤中的吸附量随吸附时间延长的动态变化过程,并比较其对农药解吸行为的影响。结果表明:土壤中添加少量生物质炭可增强其对农药的吸附作用,且土壤生物质炭含量越高,对农药的吸附作用越强;土壤对农药的吸附量随吸附接触时间延长而逐渐增加,而且添加生物质炭含量越高,土壤对敌草隆的吸附量随时间延长增加得越多。解吸试验结果表明,土壤中生物质炭含量越高,吸附接触时间越长,农药越难被解吸,当土壤中生物质炭的添加量为1.0%,吸附56 d时敌草隆的解吸率仅为1.81%。 展开更多
关键词 生物质炭 敌草隆 慢吸附 解吸
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miR-196b海绵吸附慢病毒载体的构建及其在骨髓基质细胞系ST2中的表达
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作者 杨威利 王珊 +1 位作者 王宝利 李晓霞 《天津医药》 CAS 2017年第7期695-698,共4页
目的构建miR-196b海绵吸附慢病毒载体,为研究miR-196b在骨髓基质细胞系中的功能奠定基础。方法根据miR-196b的成熟体序列设计与之互补的串联的六重复序列设计成引物,通过PCR反应将该六重复序列亚克隆至pUC19质粒中,再经酶切连接至pLVX-s... 目的构建miR-196b海绵吸附慢病毒载体,为研究miR-196b在骨髓基质细胞系中的功能奠定基础。方法根据miR-196b的成熟体序列设计与之互补的串联的六重复序列设计成引物,通过PCR反应将该六重复序列亚克隆至pUC19质粒中,再经酶切连接至pLVX-shRNA2慢病毒载体,利用293T细胞将构建成功的miR-196b海绵吸附慢病毒载体进行病毒包装和滴度测定,pLVX-shRNA2慢病毒作为对照组,miR-196b海绵吸附慢病毒作为实验组,将其感染ST2细胞,观察感染效率,并通过Western blotting检测miR-196b靶基因叉头框蛋白O1(FoxO1)的蛋白水平。结果酶切鉴定和测序结果正确,慢病毒包装所测滴度为1×108PFU/mL,将其感染靶细胞,其感染效率达80%。Western blotting结果显示,与对照组相比,其靶基因FoxO1蛋白表达水平有明显增加(P<0.05)。结论成功构建了miR-196b海绵吸附慢病毒载体,并能有效吸附内源性的miR-196b,从而发挥其抑制作用。 展开更多
关键词 微RNAS RNA干扰 miR-196b 病毒感染 骨髓基质细胞 海绵吸附病毒载体
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土壤微孔对有机物吸附/解吸的影响及其表征 被引量:9
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作者 王震宇 于晓冬 +3 位作者 许颖 高冬梅 李锋民 Baoshan Xing 《生态学报》 CAS CSCD 北大核心 2009年第4期2087-2096,共10页
土壤吸附是影响环境中有机化合物迁移、降解及生物有效性的重要过程,而微孔的存在是影响有机化合物慢吸附过程的重要因素之一,土壤孔隙结构(pore structure)及土壤微孔的研究对于理解发生在土壤中的吸附/解吸过程十分必要。综述了近年... 土壤吸附是影响环境中有机化合物迁移、降解及生物有效性的重要过程,而微孔的存在是影响有机化合物慢吸附过程的重要因素之一,土壤孔隙结构(pore structure)及土壤微孔的研究对于理解发生在土壤中的吸附/解吸过程十分必要。综述了近年来土壤微孔对有机化合物吸附解吸行为影响的研究态势,包括土壤的孔隙结构及微孔的存在形式、微孔吸附有机化合物的吸附动力学和可能机理、土壤中微孔表征的技术方法、孔隙大小分布的计算以及对未来的研究展望,以期对土壤有机污染生物修复的深入研究提供理论依据。 展开更多
关键词 土壤 微孔 慢吸附/解吸 有机化合物
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Clinical significance of connective tissue growth factor in hepatitis B virus-induced hepatic fibrosis 被引量:13
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作者 Rong-Li Piao David R Brigstock +2 位作者 Jie Zhu Man-Li Zhang Run-Ping Gao 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第18期2280-2286,共7页
AIM:To determine the utility of connective tissue growth factor(CCN2/CTGF) for assessing hepatic fibrosis in hepatitis B virus(HBV)-induced chronic liver diseases(CLD-B).METHODS:Enzyme-linked immunosorbent assay was u... AIM:To determine the utility of connective tissue growth factor(CCN2/CTGF) for assessing hepatic fibrosis in hepatitis B virus(HBV)-induced chronic liver diseases(CLD-B).METHODS:Enzyme-linked immunosorbent assay was used to measure CCN2 in sera from 107 patients with chronic hepatitis B(CHB) and 39 patients with HBVinduced active liver cirrhosis and 30 healthy individuals.Liver samples from 31 patients with CHB,8 patients with HBV-induced liver cirrhosis and 8 HBV carriers with normal liver histology were examined for transforming growth factor β-1(TGF-β1) or CCN2 mRNA levels by in situ hybridization,and computer image analysis was performed to measure integrated optimal density(IOD) of CCN2 mRNA-positive cells in liver tissues.Histological inflammation grading and fibrosis staging were evaluated by H and E staining and Van Gieson's method.RESULTS:Serum CCN2 concentrations were,respectively,4.0-or 4.9-fold higher in patients with CHB or active liver cirrhosis as compared to healthy individuals(P < 0.01).There was good consistency between the levels of CCN2 in sera and CCN2 mRNA expression in liver tissues(r = 0.87,P < 0.01).The levels of CCN2 in sera were increased with the enhancement of histological fibrosis staging in patients with CLD-B(r = 0.85,P < 0.01).Serum CCN2 was a reliable marker for the assessment of liver fibrosis,with areas under the receiver operating characteristic(ROC) curves(AUC) of 0.94 or 0.85 for,respectively,distinguishing normal liver controls from patients with F1 stage liver fibrosis or discriminating between mild and significant fibrosis.CONCLUSION:Detection of serum CCN2 in patients with CLD-B may have clinical significance for assessment of severity of hepatic fibrosis. 展开更多
关键词 Connective tissue growth factor Liver fibrosis Chronic hepatitis B Chronic liver disease Chronic hepatitis C
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Serum level of galectin-3 and its clinical significance in patients with chronic Keshan disease 被引量:1
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作者 SUN Yuxiao LIU Xin +6 位作者 GAO Dengfeng DONG Xin ZHU Canzhan HAN Zhenhua YUAN Yiqiang ZHU Yanhe NIU Xiaolin 《Journal of Medical Colleges of PLA(China)》 CAS 2013年第3期152-159,共8页
Keshan disease (KD) is a fatal endemic dilated cardiomyopathy with unclear etiology and pathogenesis, and a high mortality in China. Pathologic studies confna'ned that different degree of myocardial fibrosis existe... Keshan disease (KD) is a fatal endemic dilated cardiomyopathy with unclear etiology and pathogenesis, and a high mortality in China. Pathologic studies confna'ned that different degree of myocardial fibrosis existed in various types of KD. Myocardial fibrosis is an important contributor to the pathophysiology of left ventricular remodeling. Recently, galectin-3 (Gal-3) as a marker of cardiac fibrosis and heart failure was approved by the US FDA. The aim of this study was to evaluate the changes of serum level of Gal-3 in chronic KD (CKD) mad their clinical implications. Methods: The levels of serum Gal-3 were measured by using enzyme-linked immunosorbent assay (ELISA) in 37 CKD patients and 32 healthy controls. Echocardiography was used to determine parameter of left ventricular ejection fraction (LVEF) and left ventricular end-diastolic dimension (LVEDD). Results: The serum concentration of Gal-3 ([95.81:i:18.99] ng/ml versus [48.16-+11.09] ng/ml, t=6,906, P〈0.001) and LVEDD ([60.46+7.63] mm versus (42.69^-10.66) ram, t=3.61, P〈0.01) were significantly higher, while LVEF ([42.69-J:10.661% versus [62.16~6.381%, t=4.679, P〈0.01) were significantly lower in CKD patients compared with healthy controls. A negativecorrelation was found between elevated Gal-3 and lower LVEF (r=--0.882, P〈0.001) and a positive correlation was found between elevated Gal-3 levels and enlarged LVEDD (r=0.834, P〈0.001) or higher NYHA class (r=0.854, P〈0.01) in CKD patients. Conclusion: Serum concentration of Gal-3 is strongly correlated with poorer left ventricular systolic function, enlarged LVEDD and higher New York Heart Association (NYHA) class, which may provide indirectly diagnostic information on myocardial fibrosis and heart function in CKD patients 展开更多
关键词 Keshan disease GALECTIN-3 Myocardial fibrosis Cardiac function
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Effect of Busui Shengxue Granule (补髓生血颗粒) on Chronic Aplastic Anemia Patients’ Hematopoietic Adhesion Molecule VLA-6/CD_(49f) and Its Ligand Laminin 被引量:2
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作者 王金环 孙伟正 孙岸弢 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2011年第2期120-126,共7页
Objective: To observe the effect of Busui Shengxue Granule (补髓生血颗粒Herbal granule for replenishing marrow to produce blood) on chronic aplastic anemia (CAA) patients’ integrin α 6 (VLA-6/CD49f) and laminin (Ln)... Objective: To observe the effect of Busui Shengxue Granule (补髓生血颗粒Herbal granule for replenishing marrow to produce blood) on chronic aplastic anemia (CAA) patients’ integrin α 6 (VLA-6/CD49f) and laminin (Ln). Methods: Sixty-five patients were divided into experimental group and control group through random number table. There were 34 patients, 17 were male and 17 female, aged 2–67, with a medianage of 30.2 ± 8.6, in the experimental group, including 17 patients of kidney-yin deficiency and 17 of kidney-yang deficiency, treated by Busui Shengxue Granule. There were 31 patients in the control group,16 were male and 15 female, aged 4–65, with a medianage of 31.2 ± 8.0; administered Zaizhang Shengxue Tablet (再障生血片Herbal tablet for chronic aplastic anemia). Both groups were treated for six months and compared with 10 normal persons after the treatment. Flow cytometry was adopted to detect the change in the expression of VLA-6/CD49f, receptor in mononuclear cells of CAA patients and normal persons. Enzyme-linked immunosorbent assay was applied to detect the expression of peripheral serum Ln. Results: CAA patients’ VLA-6/CD49f was in the state of low expression and Ln in the state of high expression. After the treatment, both VLA-6/CD49f and Ln were regulated to some extent and the change in the experimental group was better than that of the control group. Compared with the kidney-yin deficiency patients, those indices of kidney-yang deficiency patients were easier to correct. Conclusion: The VLA-6/CD49f and Ln expressions of CAA patients are abnormal. The treatment with Busui Shengxue Granule makes both of them improved. 展开更多
关键词 ANEMIA APLASTIC adhesion molecule INTEGRIN LAMININ
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