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Synergistic mechanism between SDBS and oleic acid in anionic flotation of rhodochrosite

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International Journal of Minerals,Metallurgy and Materials 2015年第5期22卷 447-452页

作者： Yong-jie bu Run-qing Liu Wei Sun Yue-hua Hu School of Minerals Processing and Bioengineering Central South University

Pure mineral flotation experiments, zeta potential testing, and infrared spectroscopy were employed to investigate the interracial reactions of oleic acid （collector）, sodium dodecyl benzene sulfonate （SDBS, synergist）, and rhodochrosite in an anionic system. The pure mineral test shows that oleic acid has a strong ability to collect products on rhodochrosite. Under neutral to moderately alkaline conditions, low temperature （e.g., 10℃） adversely affects the flotation performance of oleic acid; the addition of SDBS significantly improves the dis- persion and solubility of oleic acid, enhancing its collecting ability and flotation recovery. The zeta potential test shows that rhodochrosite interacts with oleic acid and SDBS, resulting in a more negative zeta potential and the co-adsorption of the collector and synergist at the mineral surface. Infrared spectroscopy demonstrated that when oleic acid and SDBS are used as a mixed collector, oleates along with -COO- and --COOH functional groups are formed on the mineral surface, indicating chemical adsorption on rhodochrosite. The results demonstrate that oleic acid and SDBS co-adsorb chemically on the surface ofrhodochrosite, thereby improving the flotation performance of the collector.

关键词： rhodochrosite flotation sodium dodecyl benzene sulfonate oleic acid synergistic effects temperature

The role of statins in erectile dysfunction： a systematic review and meta-analysis

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Asian Journal of Andrology 2014年第3期16卷 461-466页

作者： Xiang Cai Ye Tian Tao Wu Chen-Xi Cao Si-Yuan bu Kun-jie Wang Department of Urology West China Hospital Sichuan University Chengdu China

To evaluate the effect of statins for erectile dysfunction （ED）, a systematic review of the literature was conducted in the Cochrane Library, Embase and PubMed from the inception of each database to June 2013. Only randomized controlled trials （RCTs） comparing treatment for ED with statins were identified. Placebo RCTs with the International Index of Erectile Function （IIEF） as the outcome measure were eligible for meta-analysis. A total of seven RCTs including two statins with a total of 586 patients strictly met our criteria for systematic review and five of them qualified for the meta-analysis. A meta-analysis using a random effects model showed that statins were associated with a significant increase in IIEF-5 scores （mean difference （MD）： 3.27; 95% confidential interval （CI）：1.51 to 5.02; P〈 0.01） and an overall improvement of lipid profiles including total cholesterol （MD： -1.08; 95% Ch -1.68 to -0.48; P 〈 0.01）, low-density lipoprotein （LDL） cholesterol （MD： -1.43; 95% Ch -2.07 to -0.79; P 〈 0.01）, high-density lipoprotein （HDL） cholesterol （MD： 0.24; 95% Ch 0.13 to 0.35; P〈 0.01） and triglycerides （TGs）（MD. -0.55; 95% Ch -0.61 to -0.48; P 〈 0.01）. In summary, our study revealed positive consequences of these lipid-lowering drugs on erectile function, especially for nonresponders to phosphodiesterase type 5 inhibitors （PDE51s）. However, it has been reported that statin therapy may reduce levels of testosterone and aggravate symptoms of ED. Therefore, larger, well-designed RCTs are needed to investigate the double-edged role of statins in the treatment of ED.

关键词： dyslipidemia endothelial dysfunction erectile dysfunction statins

Biventricular pacing for treating heart failure in children: A case report and review of the literature

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World Journal of Clinical Cases 2019年第3期7卷 396-404页

作者： Shan Yu Qiang Wu Bao-Lin Chen Ya-Ping An jie bu Song Zhou Yong-Mei Wang Department of Cardiology Guizhou Provincial People’s Hospital Department of Radiology Guizhou Provincial People’s Hospital

BACKGROUND Cardiac resynchronization therapy(CRT) can be used as an escalated therapy to improve heart function in patients with cardiac dysfunction due to long-term right ventricular pacing. However, guidelines are only targeted at adults. CRT is rarely used in *** SUMMARY This case aimed to implement biventricular pacing in one child with heart failure who had a left ventricular ejection fraction < 35% at 4 years after implantation of an atrioventricular sequential pacemaker due to atrioventricular ***, echocardiography showed atrial sensing ventricular pacing and QRS wave duration of 120-130 ms, and cardiac function significantly improved after upgrading *** Patients whose cardiac function is deteriorated to a level to upgrade to CRT should be upgraded to reverse myocardial remodeling as soon as possible.

关键词： Artificial cardiac pacing Atrioventricular block Cardiac resynchronization therapy Child Heart failure Case report

Overexpression of rice F-box phloem protein gene OsPP12-A13 confers salinity tolerance in Arabidopsis

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BIOCELL 2021年第4期45卷 1121-1135页

作者： CHUNKUN FAN YONGPENG ZHANG CHUNBAO YANG YAWEI TANG JI QU bu jie DEJI QUZHEN LIYUN GAO Tibet Academy of Agriculture and Animal Husbandry Sciences Lhasa850009China

Salinity is a serious challenge for agriculture production by limiting the arable *** is a major staple food crop but very sensitive to salt *** this study,we used Arabidopsis for the functional characterization of a rice F-box gene LOC_Os04g48270(OsPP12-A13)under salinity ***12-A13 is a nuclear-localized protein that is strongly upregulated under salinity stress in rice and showed the highest expression in the stem,followed by roots and *** types of transgenic lines for OsPP12-A13 were generated,including constitutive tissue over-expression using the CaMV35S promoter and phloem specific over-expression using the pSUC2 *** types of transgenic plants showed salinity tolerance at the seedling stage through higher germination percentage and longer root length,as compared to control plants under salt stress in MS *** the transgenic plants also exhibited salt tolerance at the reproductive stage through higher survival rate,plant dry biomass,and seed yield per plant as compared to control *** of Na+concentration in leaves,stem and roots of salt-stressed transgenic plants showed that Na^(+) concentration was less in leaf and stem as compared to *** opposite was observed in wild type stressed plants,suggesting that OsPP12-A13 may be involved in Na+transport from root to *** plants also displayed less ROS levels and higher activities of peroxidase and glutathione S-transferase along with upregulation of their corresponding genes as compared to control plants which further indicated a role of OsPP12-A13 in maintaining ROS homeostasis under salt ***,the non-significant difference between the transgenic lines obtained from the two vectors highlighted that OsPP12-A13 principally works in the *** together,this study showed that OsPP12-A13 improves salt tolerance in rice,possibly by affecting Na^(+) transport and ROS homeostasis.

关键词： Antioxidants Rice phloem protein Reactive oxygen species Salt stress Na^(+)transport

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不同中医证候糖尿病脑病的中药防治研究进展

天津中医药 2024年第6期41卷 795-801页

作者：易鹏容林雪玲步洁尹清晟张艳军庄朋伟天津中医药大学天津301617 天津中医药大学第一附属医院天津300381 国家中医针灸临床医学研究中心天津300381

随着人们生活方式及饮食结构的变化,代谢性疾病逐年高发,并且其中枢神经系统发症,如糖尿病脑病日益受到人们的关注。糖尿病脑病的发病机制复杂且尚不明确,目前西医尚无有效治疗药物并且临床缺乏个性化治疗方案。中医学认为糖尿病患者阴... 详细信息

随着人们生活方式及饮食结构的变化,代谢性疾病逐年高发,并且其中枢神经系统发症,如糖尿病脑病日益受到人们的关注。糖尿病脑病的发病机制复杂且尚不明确,目前西医尚无有效治疗药物并且临床缺乏个性化治疗方案。中医学认为糖尿病患者阴阳两虚,久病入络,气机逆乱,肾精亏虚,故而浊毒内生,损伤脑络,发为脑病。参考文献及临床研究,总结归纳糖尿病脑病患者表现的常见证候类型:肾虚髓减证,脾肾两虚证,痰浊瘀阻证,肾虚瘀阻证,气阴两虚、瘀阻证。基于传统中医药理论的辨证论治可有效改善糖尿病患者的认知损伤及证候表现,实现临床个性化诊疗和精准用药,显著体现中药临床价值及优势。文章主要对目前临床辨证论治糖尿病脑病的中药复方及其机制进行了系统整理,以期为临床精准防治糖尿病脑病提供参考依据。

关键词：糖尿病脑病中药认知障碍不同证候

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风电齿轮箱行星轮系齿轮修形研究

内燃机与配件 2024年第1期 45-48页

作者：卜忠颉刘林何录忠阳雪兵章滔熊顺哈电风能有限公司湖南湘潭411101 海上风力发电装备与风能高效利用全国重点实验室湖南湘潭411101 湖南精益传动机械设计有限公司湖南长沙410007

前集成式传动链已经成为风电机组的主要技术路线,主轴系对第一级行星轮系耦合影响突出。以某中速永磁风电机组传动链为研究对象,建立了轮毂、主轴系和第一级行星轮系的一体化模型。轮毂中心施加载荷,进行仿真分析,研究了主轴系变形对第... 详细信息

前集成式传动链已经成为风电机组的主要技术路线,主轴系对第一级行星轮系耦合影响突出。以某中速永磁风电机组传动链为研究对象,建立了轮毂、主轴系和第一级行星轮系的一体化模型。轮毂中心施加载荷,进行仿真分析,研究了主轴系变形对第一级行星轮系啮合的影响,并进一步开展了齿轮微观修形设计和试验研究。研究显示,本文轮齿的微观修形方案能显著改善第一级行星轮系偏载现象,降低主轴系变形对第一级行星轮系啮合的影响,为风电齿轮箱行星轮系的参数设计和轮齿微观修形提供了参考依据。

关键词：主轴系行星轮系微观修形

Professor Zhang Ning's experience in treating hyperthyroidism from liver

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Journal of Hainan Medical University 2020年第24期26卷 60-64页

作者： Tian-jie bu Pu Yan Ning Zhang Beijing University of Chinese Medicine Beijing 100029China Department of Nephrology and Endocrinology Wangjing Hospital of China Academy of Chinese Medical SciencesBeijing 100102China

In recent years,due to the increasingly accelerated pace of life,the incidence of hyperthyroidism is increasing year by year,which has a serious impact on the quality of life of *** Chinese Medicine has a unique effect on hyperthyroidism,Professor Zhang Ning,my tutor,who has been devoting to the clinical study of traditional Chinese medicine in the prevention and treatment of thyroid diseases for a long time,has rich theoretical knowledge as well as clinical practice ***'s also good at using classical prescriptions for syndrome differentiation treatment,and has achieved excellent clinical *** Zhang Ning summarized the diagnosis and treatment idea of"treating from the liver"and ran it throughout the whole treatment *** the patients prone to abnormal liver function,it is advocated to focus on protecting the liver in terms of medication,increase the effect of anti-hyperthyroidism,and also obtain satisfactory efficacy.

关键词： Hyperthyroidism Treatment from liver Dialectical treatment Clinical experience Hepatic function abnormal

The roles of electrons in the electronic structures and optical properties of graphyne

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Chinese Science bulletin 2012年第23期57卷 3080-3085页

作者： HE Xiujie TAN jie bu HongXia ZHANG HongYu ZHAO MingWen School of Physics and State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China

The electronic structures and optical properties of graphyne consisting of sp-and sp 2-hybridized carbon atoms are studied using first-principles calculations.A tight-binding model of the 2p z orbitals are proposed to describe the electronic bands near the Fermi *** results show that the natural band gap of graphyne originates from the inhomogeneous bindings between differently-hybridized carbon *** interlayer interactions of bulk graphyne narrow the band gap to 0.16 eV and result in redshift of the optical spectral peaks as compared to single-layered graphyne.

关键词： graphyne electronic structure tight-binding model first—principles calculation

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公共图书馆网站内容建设探析

图书馆工作与研究 2011年第10期 100-102页

作者：卜洁天津图书馆

文章主要针对当前公共图书馆网站内容建设现状及存在的问题,提出了完善公共图书馆网站内容建设的几点建议,旨在使公共图书馆网站得以健康稳定地长期发展。

关键词：公共图书馆网站网站内容