维普中文期刊产品整合服务
1054篇 您的检索式:作者名="Ta K"
    题名 作者 年代 出处 被引量
1机械化学法制备的Al/Ce复合氧化物负载NiMo催化剂的加氢脱硫活性(英文)显示文摘将Al和/或Ce的硝酸盐与NH_4HCO_3球磨混合,采用机械化学法制备了Al_2O_3-CeO_2载体(其中Ce含量为1-10 wt%),再以杂多钼酸盐(NH_4)_4NiMo_6O_(24)为活性金属Ni和Mo的前驱体,通过浸渍法制备NiMo_6/Al_2O_3-CeO_2催化剂,并将其用于1-苯并噻吩(BT)的加氢脱硫(HDS)反应中.运用化学分析、X射线衍射、N_2吸附-脱附法、H_2程序升温还原、NH_3程序升温脱附和X射线光电子能谱对催化剂的物化性质进行了表征.结果表明,催化剂的酸性随着载体中Ce含量的增加而下降.Ce修饰的Al_2O_3载体表面的NiS/MoS原子比下降了2倍.NiMo_6/Al_2O_3催化剂表现出最高的HDS活性(以单位重量催化剂计),其酸性和表面MoO_xS_y物种的浓度(Mo^(5+)浓度)也最高;当催化剂中Ce含量逐渐增加到10 wt%以上时,其活性逐渐将为0.与浸渍法制得的参比催化剂相比,前驱体和催化剂组成相同的情况下,采用机械化学法制得的所有催化剂活性明显提高.Květa Jirátová Alla Spojakina Luděk Kaluza Radostina Palcheva Jana Balabánová Georgi Tyuliev 2016Chinese Journal of Catalysis2016,37,2:6
2多壁纳米碳管对磷酸铁锂正极材料热稳定性及表面形貌的影响(英文)显示文摘合成了一种新型的LiFePO4/多壁纳米碳管(MWCNTs)复合正极材料。通过MWCNTs和PPy-PEG粘结剂有机地在LiFePO4颗粒间构成三维网络导电结构,并借助SEM、TGA和高分辨裂解气相色谱,研究了LiFePO4-MWCNT正极材料的表面形貌和热稳定性。结果表明,500℃下该材料的热分解程度非常小,说明MWCNTs和PPy-PEG的复合是提高LiFePO4正极材料的热稳定性和改善表面形貌的有效途径。Mária Filkusová Andrea Fedorková Renáta Oriňáková Andrej Oriňák Zuzana Nováková Lenka Skantárová 2013新型炭材料2013,28,1:3
3Regulated upon activation,normal T cell expressed and secreted(RANTES)levels in the peripheral blood of patients with Alzheimer’s disease显示文摘Alzheimer’s disease(AD)is the most common type of dementia,but it is very difficult to diagnose with certainty,so many AD studies have attempted to find early and relevant diagnostic markers.Regulated upon activation,normal T cell expressed and secreted(RANTES,also known as C-C chemokine ligand)is a chemokine involved in the migration of T cells and other lymphoid cells.Changes in RANTES levels and its expression in blood or in cerebrospinal fluid have been reported in some neurodegenerative diseases,such as Parkinson’s disease and multiple sclerosis,but also in metabolic diseases in which inflammation plays a role.The aim of this observational study was to assess RANTES levels in peripheral blood as clinical indicators of AD.Plasma levels of RANTES were investigated in 85 AD patients in a relatively early phase of AD(median 8.5 months after diagnosis;39 men and 46 women;average age 75.7 years),and in 78 control subjects(24 men and 54 women;average age 66 years).We found much higher plasma levels of RANTES in AD patients compared to controls.A negative correlation of RANTES levels with age,disease duration,Fazekas scale score,and the medial temporal lobe atrophy(MTA)score(Scheltens’s scale)was found in AD patients,i.e.,the higher levels corresponded to earlier stages of the disease.Plasma RANTES levels were not correlated with cognitive scores.In AD patients,RANTES levels were positively correlated with the levels of pro-inflammatory cytokines interleukin-6 and tumor necrosis factor-α,which is consistent with the wellknown fact that AD is associated with inflammatory processes.RANTES levels were also positively correlated with insulin levels in AD patients,with insulin resistance(HOMA-R)and pancreatic beta cell function(HOMA-F).This study evaluated several clinical and metabolic factors that may affect plasma levels of RANTES,but these factors could not explain the increases in RANTES levels observed in AD patients.Plasma levels of RANTES appear to be an interesting peripheral marker for early stages of AD.The study was approved by the Ethics Committee of Institute of Endocrinology,Prague,Czech Republic on July 22,2011.Gabriela Vacínová Daniela Vejražkova Robert Rusina Iva Holmerová Hana Vaňková Eva Jarolímová Josef Včelák Běla Bendlová Markéta Vaňková 2021Neural Regeneration Research2021,16,4:3
4Constitutive renal Rel/nuclear factor-κB expression in Lewis polycystic kidney disease rats显示文摘AIM:To determine the temporal expression and pattern of Rel/nuclear factor(NF)-κB proteins in renal tissue in polycystic kidney disease(PKD). METHODS: The renal expression of Rel/NF-κB proteins was determined by immunohistochemistry, immunofluorescence and immunoblot analysis in Lewis polycystic kidney rats(LPK, a genetic ortholog of human nephronopthsis-9) from postnatal weeks 3 to 20. At each timepoint, renal disease progression and the mR NA expression of NF-κB-dependent genes(TNFa and CCL2) were determined. NF-κB was also histologicaly assessed in human PKD tissue.RESULTS: Progressive kidney enlargement in LPK rats was accompanied by increased renal cell proliferation and interstitial monocyte accumulation(peaking at weeks 3 and 10 respectively), and progressive interstitial fibrosis(with a smooth muscle actin and Sirius Red deposition significantly increased compared to Lewis kidneys from weeks 3 to 6 onwards). Rel/NF-κB proteins(phosphorylated-p105, p65, p50, c-Rel and RelB) were expressed in cystic epithelial cells(CECs) of LPK kidneys as early as postnatal week 3 and sustained until latestage disease at week 20. From weeks 10 to 20, nuclear p65, p50, Rel B and cytoplasmic IκBa protein levels, and TNFa and CCL2 expression, were upregulated in LPK compared to Lewis kidneys. NF-κB proteins were consistently expressed in CECs of human PKD. The DNA damage marker γ-H2AX was also identified in the CECs of LPK and human polycystic kidneys. CONCLUSION: Several NF-κB proteins are consistently expressed in CECs in human and experimental PKD. These data suggest that the upregulation of both the canonical and non-canonical pathways of NF-κB signaling may be a constitutive and early pathological feature of cystic renal diseases.Michelle HT Ta Kristina G Schwensen David Liuwantara David L Huso Terry Watnick Gopala K Rangan 2016World Journal of Nephrology2016,5,4:2
5高位胸段硬膜外麻醉下清醒病人的冠状动脉搭桥手术显示文摘目的 了解在高位胸段硬膜外麻醉下避免全麻行非体外循环心脏跳动下冠状动脉搭桥手术的可行性。方法 硬膜外麻醉下对 2 5例清醒病人行非体外循环心脏跳动下冠状动脉搭桥手术 ,没有气管插管全麻 ,所有病人在手术前晚行硬膜外置管。结果 总共搭桥 71支 (1支 11例 ,2支 5例 ,3支 6例 ,4支 3例 )。除 1例因为术中出现室颤转为全麻和体外循环外 ,2 4例在硬外麻作为唯一麻醉下完成非体外循环心脏跳动下冠状动脉搭桥手术。除 2例行左胸小切口外其余行正中切口 ;其中 6例为再次手术 ;平均每例搭桥2 8支 ,没有手术死亡。术后在复苏室和病房住院时间分别为 (16 2± 4 2 )h和 (3 2 4± 1 2 )d。结论 本组的早期经验提示在没有气管插管全麻。郭惠明 Murali Chakravarthy Vivek Jawali TA Patil K Jayaprakash NV Shivananda 2003岭南心血管病杂志2003,9,4:2
6Intraneuronal beta-amyloid is a major risk factor - novel evidence from the APP/PS1KI mouse model 显示文摘Bayer TA Breyhan H Duan K 2008Neurodegener Dis2008,5,34:1
7Anti-allergic effects of Sanguisorba officinalis on animal models of allergic reactions显示文摘SHIN T Y LEE K B KIM S H TA Y 2002Immunopharmacology & Immunotoxicology2002,24,3:1
8Factors associated with dental caries experience in 1-year-old children显示文摘Warren JJ Weber-Gasparoni K Marshall TA 2008J Public Health Dent2008,68,2:1
9Chlorpyrifos exposure during a critical neonatal period elicits gender-selective deficits in the development of coordination skills and locomotor activity 显示文摘Dam K Seidler FJ Slotkin TA 2000Brain Res Dev Brain Res2000,121,2:1
10Diffusion-weighted imaging for the evaluation of diffuse axonal injury in closed heed injury显示文摘Huisman TA Sorensen AG Hergan K 2003J Comput Assist Tomogr2003,27,1:1
11MRI measuremenes of water diffusion:impact of region of interest selection on ischemic quantifica- tion显示文摘Ozsunar Y Koseoglu K Huisman TA 2004Eur J Radiol2004,51,3:1
12A phase Ⅱ multicenter study of lenalidomide in relapsed or refractory classical Hodgkin lymphoma显示文摘Fehniger TA Larson S Trinkaus K 2009Blood2009,114,:1
13Chronic wound pathogenesis and current treatment strategies:a unifying hypothesis显示文摘Mustoe TA O'Shaughnessy K Kloeters O 0,,7:1
14Calcium anidotrihydroborate:a hydrogen storage material显示文摘Diyabalanage H V K Shrestha R P Semelsberger TA Scott B L Bowden M E Davis B L Burrell A K 0,,47:1
15Rapid prototyping: the future of trauma surgery?显示文摘Brown GA Firoozbakhsh K DeCoster TA 2003J Bone Joint Surg Am2003,85,:1
16Osseous abnormalities of the mandibular condyle: diagnostic reliability of cone beam computed tomography compared with helical computed tomography based on an autopsy material显示文摘Honda K Larheim TA Maruhashi K 2006Dentomaxillofac Radiol2006,35,3:1
17Hypoglycemic accuracy and improved low glucose alerts of the latest Dexcom G4 platinum continuous glucose monitoring system 显示文摘Peyser TA Nakamura K Price D 2015Diabetes Technol Ther2015,17,8:1
18Contrast magnetic resonance imaging in the assessment of myocardial in patients with stable coronary artery disease and left ventricular dysfunction显示文摘Ranani K Judd RM Holly TA 1998Circulation1998,98,:1
19The impact of cigarette smoking on mortality,quality of life,and comorbid illness among HIV-positive veterans显示文摘Crothers K Griffith TA Mc Ginnis 2005J Gen Intern Med2005,20,11:1
20Longitudinal motor development of 'apparently normal' high-risk infants at 18 months,3 and 5 years显示文摘Goven TA Lui K 2002Early Hum Dev2002,70,:1
返回顶部 每页显示:
共53页 首页 上一页 第1页 下一页 末页 /53 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费