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Microbial calcite,a bio-based smart nanomaterial in concrete remediation

International Journal of smart and Nano Materials 2010年第1期1卷 28-39页

作者： s.s.Bang J.J.Lippert U.Yerra s.mulukutla V.Ramakrishnan Department of Chemical and Biological Engineering South Dakota School of Mines and TechnologyRapid CitySD 57701USA Department of Civil and Environmental Engineering South Dakota School of Mines and TechnologyRapid CitySD 57701USA

The concept of developing a biosealant in concrete remediation is based on unique microbial metabolic processes.A common soil microorganism,sporosarcina pasteurii,can induce CaCO_(3) precipitation in the surroundings in response to environmental cues such as high pH and available nutrients and minerals.A new biomolecule,microbial calcite is introduced as a smart nanomaterial for self-healing concrete-its effects on concrete performance were evaluated with regard to surface crack remediation and durability *** crack remediation,*** cells immobilized on porous glass beads,siran^(TM),were applied to cracks and tested for stiffness and compressive *** durability tests,cement mortar beams prepared with bacteria were subjected to freeze-thaw cycles and examined for mean expansions and weight *** performance of the concrete was significantly enhanced by treatment with microbial calcite in simulated concrete cracks and cement mortar beams.

关键词： biosealant microbial calcite smart nanomaterial sporosarcina pasteurii immobilization concrete remediation

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最优化设计的铁磁流体密封磁场分析

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润滑与密封 1986年第3期 69-71页

作者： mulukutla s.sarma ,许孙曲

铁磁流体装置已在激光系统、高真空设备、计算机、扬声器、惯性阻尼器和发动机中获得了应用。对于复杂和变化多端的密封问题,我们可以用磁流体密封技术获得正常的解决,这些问题有许多是具有极恶劣的环境、宽广的温度范围和剧烈的放射活... 详细信息

铁磁流体装置已在激光系统、高真空设备、计算机、扬声器、惯性阻尼器和发动机中获得了应用。对于复杂和变化多端的密封问题,我们可以用磁流体密封技术获得正常的解决,这些问题有许多是具有极恶劣的环境、宽广的温度范围和剧烈的放射活性情况的特性的。为了在满足任何特殊应用所要求的整个范围的同时,获得最大成本效力的解决办法,在设计磁性液体密封磁路时,必须考虑一些因素,如可获得的密封面大小,密封面两端的压力差,对各种环境的化学适应性和永磁和软磁材料的选择。为了在解释磁性材料的非线性特性的同时估计磁通漏泄和边缘效应,必须采取数学手段。来确定重要参数改变所产生的影响,以达到设备的最优化设计。本文介绍模仿铁磁流体密封的模拟技术和讨论包含固有对称性的各种几何图形的方法。用数学分析模型,由计算机得到详细的磁通分布图。

关键词：铁磁流体密封磁通分布磁性液体密封最优化设计

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Power system analysis and design 3.

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丛书名：时代教育·国外高校优秀教材精选

2004年

作者： J. Duncan Glover mulukutla s. sarma J. 邓肯·格洛弗穆卢库特拉 s.萨尔马

本书的主要内容是介绍电力系统分析和设计的方法。

ISBN: (数字)7111147855

ISBN: (纸本)7111147855

本书的主要内容是介绍电力系统分析和设计的方法。

关键词： Electric power systems

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选择性经皮冠状动脉介入治疗前使用他汀类药物对围PCI期心肌损伤的作用

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世界核心医学期刊文摘（心脏病学分册） 2005年第4期1卷 27-28页

作者： mulukutla s. R. Marroquin O. C. smith C. 郭宁

This study evaluated whether pretreatment with statins was associated with a d ecreased incidence of periprocedural myocardial injury. Periprocedural myocardia l injury occurs after percutaneous coronary intervention(PCI) and is associated with adverse outcomes. The pleiotropic properties of statins stabilize plaque an d decrease the inflammatory milieu of atherosclerotic lesions. Accordingly, we h ypothesized that preprocedural statin therapy would decrease periprocedural myoc ardial injury. We enrolled 425 patients who underwent successful PCI. The contro l arm (n=150) included patients not on statin therapy at the time of PCI, and th e statin arm(n=275) included patients who were taking statin medication before P CI. All patients had serial enzymes measured, including creatine kinase (CK), CK -MB, and troponin I. The incidence of increased levels of CK and CK-MB >3 time s normal and the absolute increase in CK and troponin I were compared between gr oups. The control arm had significantly higher periprocedural levels of CK. In t he control group, 6%of patients had CK increases >3 times the upper limit of no rmal compared with 1.8%in the statin group(p=0.02). The control arm had a highe r frequency of CK-MB increases >3 times the upper limit of normal(7.3%vs 2.2% , p =0.01). There was a trend toward higher levels of troponin I in the control group(3.21 vs 1.85 ng/ml, p=0.06). Thus, statin therapy before elective PCI was associated with lower levels of periprocedural CK.

关键词：他汀类药物 PCI 介入治疗肌损伤稳定斑块肌钙蛋白正常上限炎症反应酶学

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无闭塞性冠状动脉疾病女性胸痛患者中的炎症反应、内皮细胞激活和冠状动脉微血管功能障碍

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世界核心医学期刊文摘（心脏病学分册） 2006年第1期2卷 24-25页

作者： Marroquin O. C. Kip K. E. mulukutla s. R. 高登峰 Dr. University of Pittsburgh Medical Center 200 Lothrop Street Pittsburgh PA 15213 United States

Background: Coronary artery microvascular dysfunction is prevalent in women with chest pain in the absence of obstructive coronary artery disease(CAD) and is manifested by attenuated coronary flow reserve(CFR). Markers of inflammation and endothelial cell activation have been found to be elevated in patients with chest pain but without CAD. The relationship between inflammation, endothelial activation, and CFR is not known. Methods: Ninety-four women with chest pain in the absence of obstructive angiographic CAD underwent catheterization-based assessment of CFR and measurement of levels of inflammatory markers(n=78) and endothelial cell activation in the NHLBI WIsE study. Results: Coronary flow reserve did not correlate with levels of C-reactive protein(high-sensi-tivity C-reactive protein)(rs=-0.07, P=.53), interleukin(IL)-6(rs=-0.12,P=.31),IL-18(rs=0.14, P=.23), tumor necrosis factorα(rs=-0.09, P=.43), transforming growth factor β1(rs=0.02, P=.84), and soluble intracellular adhesion molecule-1(rs=0.04, P=.68). Median levels of markers of inflammation and endothelial cell activation did not differ between the 57 women with abnormal CFR(scular function(high-sensiti-vity C-reactive protein 0.32 vs 0.25 mg/dL, P=.80; IL-6 2.89 vs 2.39 pg/mL, P=.63; IL-18 218 vs 227 pg/mL, P=.59; tumor necrosis factor α2.7 vs 2.4 pg/mL, P=.43; transforming growth factor β1 9928 vs 12 436 pg/mL, P=.76; soluble intracellular adhesion molecule-1 286 vs 287 pg/mL, P=.95). Multivariable models demonstrated no evidence of associations between markers of inflammation and of endothelial cell activation and CFR. Conclusions: Coronary microvascular dysfunction is not associated with markers of inflammation and endothelial cell activation in women with chest pain in the absence of obstructive CAD. These results suggest that inflammation and endothelial cell activation may not play a pathophysiological role in coronary microvascular dysfunction.

关键词：冠状动脉疾病内皮细胞激活微血管功能障碍炎症反应闭塞性患者胸痛女性冠状动脉血流储备导管插入

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