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甲基二乙醇胺双油酸酯对润滑油在水土界面间吸附行为的影响研究 被引量:1
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作者 范兴钰 吴江 +4 位作者 陈波水 丁建华 江泽琦 郑寻 奚立文 《重庆理工大学学报(自然科学)》 CAS 北大核心 2018年第12期105-112,共8页
采用振荡平衡法对含甲基二乙醇胺双油酸酯(MDEAO)的润滑油在土壤中的吸附行为进行了初步研究。考察了在水土界面间MDEAO对土壤吸附润滑油的动力学特征和吸附等温曲线的影响。实验结果表明,含MDEAO润滑油在水土体系中能较快地产生吸附,... 采用振荡平衡法对含甲基二乙醇胺双油酸酯(MDEAO)的润滑油在土壤中的吸附行为进行了初步研究。考察了在水土界面间MDEAO对土壤吸附润滑油的动力学特征和吸附等温曲线的影响。实验结果表明,含MDEAO润滑油在水土体系中能较快地产生吸附,初始吸附速率大,在30 min左右达到吸附平衡状态,吸附动力学曲线符合Lagergren伪二级动力学方程; MDEAO初始浓度低于临界胶束浓度时,随着MDEAO浓度的升高,土壤对润滑油的吸附量逐渐增大,促进吸附; MDEAO初始浓度高于临界胶束浓度时,MDEAO形成的胶束对润滑油的增溶效果好,土壤对润滑油的吸附量逐渐减小,抑制吸附;含MDEAO润滑油在水土体系中的吸附等温曲线符合Freundlich吸附等温模型。 展开更多
关键词 甲基二乙醇胺双油酸酯 吸附 土壤 润滑油
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Emerging roles of bile acids in chronic hepatitis,liver cirrhosis,and hepatocellular carcinoma
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作者 zhen xun Xiaobao Yao Qishui Ou 《Cellular & Molecular Immunology》 SCIE CAS CSCD 2023年第9期1087-1089,共3页
Bile acids(BAs)are cholesterol-derived molecules that are produced in the liver,secreted into the duodenum,absorbed by the small intestine and recycled back to the liver[1].BAs regulate cholesterol metabolism,promote ... Bile acids(BAs)are cholesterol-derived molecules that are produced in the liver,secreted into the duodenum,absorbed by the small intestine and recycled back to the liver[1].BAs regulate cholesterol metabolism,promote bile secretion,and emulsify and facilitate the digestion and absorption of dietary fats;in addition,there is growing evidence that BAs also act as endocrine cell signaling mediators that activate nuclear or membrane-localized receptors to trigger specific signaling pathways and regulate various biological processes,including immunity[2,3].Findings from studies in patients and cell or mouse models support the notion that BAs are critical regulators of the development of liver diseases,including chronic hepatitis B(CHB)[4],liver cirrhosis(LC)[5],and hepatocellular carcinoma(HCC)[6].Here,we discuss the emerging roles of BAs in the progression of CHB,LC,and HCC. 展开更多
关键词 BILE CIRRHOSIS METABOLISM
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Taurocholic acid inhibits the response to interferon-αtherapy in patients with HBeAg-positive chronic hepatitis B by impairing CD8^(+)T and NK cell function 被引量:3
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作者 zhen xun Jinpiao Lin +12 位作者 Qingqing Yu Can Liu Jinlan Huang Hongyan Shang Jianhui Guo Yuchen Ye Wennan Wu Yongbin Zeng Songhang Wu Siyi Xu Tianbin Chen Jing Chen Qishui Ou 《Cellular & Molecular Immunology》 SCIE CAS CSCD 2021年第2期461-471,共11页
Pegylated interferon-alpha (PegIFNα) therapy has limited effectiveness in hepatitis B e-antigen (HBeAg)-positive chronic hepatitis B (CHB) patients. However, the mechanism underlying this failure is poorly understood... Pegylated interferon-alpha (PegIFNα) therapy has limited effectiveness in hepatitis B e-antigen (HBeAg)-positive chronic hepatitis B (CHB) patients. However, the mechanism underlying this failure is poorly understood. We aimed to investigate the influence of bile acids (BAs), especially taurocholic acid (TCA), on the response to PegIFNα therapy in CHB patients. Here, we used mass spectrometry to determine serum BA profiles in 110 patients with chronic HBV infection and 20 healthy controls (HCs). We found that serum BAs, especially TCA, were significantly elevated in HBeAg-positive CHB patients compared with those in HCs and patients in other phases of chronic HBV infection. Moreover, serum BAs, particularly TCA, inhibited the response to PegIFNα therapy in HBeAg-positive CHB patients. Mechanistically, the expression levels of IFN-γ, TNF-α, granzyme B, and perforin were measured using flow cytometry to assess the effector functions of immune cells in patients with low or high BA levels. We found that BAs reduced the number and proportion and impaired the effector functions of CD3^(+)CD8^(+) T cells and natural killer (NK) cells in HBeAg-positive CHB patients. TCA in particular reduced the frequency and impaired the effector functions of CD3^(+)CD8^(+) T and NK cells in vitro and in vivo and inhibited the immunoregulatory activity of IFN-α in vitro. Thus, our results show that BAs, especially TCA, inhibit the response to PegIFNα therapy by impairing the effector functions of CD3^(+)CD8^(+) T and NK cells in HBeAg-positive CHB patients. Our findings suggest that targeting TCA could be a promising approach for restoring IFN-α responsiveness during CHB treatment. 展开更多
关键词 Bile acids Pegylated interferon Hepatitis B virus Immune cells Mechanism
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