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141.
142.
Hyun Jung Hwang Nayeon Kim Allison B. Herman Myriam Gorospe Jae-Seon Lee 《International journal of molecular sciences》2022,23(17)
Aging causes a progressive decline in the structure and function of organs. With advancing age, an accumulation of senescent endothelial cells (ECs) contributes to the risk of developing vascular dysfunction and cardiovascular diseases, including hypertension, diabetes, atherosclerosis, and neurodegeneration. Senescent ECs undergo phenotypic changes that alter the pattern of expressed proteins, as well as their morphologies and functions, and have been linked to vascular impairments, such as aortic stiffness, enhanced inflammation, and dysregulated vascular tone. Numerous molecules and pathways, including sirtuins, Klotho, RAAS, IGFBP, NRF2, and mTOR, have been implicated in promoting EC senescence. This review summarizes the molecular players and signaling pathways driving EC senescence and identifies targets with possible therapeutic value in age-related vascular diseases. 相似文献
143.
Herman Aspegren 《Journal of the American Oil Chemists' Society》1927,4(1-10):298-303
144.
145.
Simple expressions are derived for the Maliuzhinets (integral) function which arises in connection with diffraction by an impedance wedge. The given expressions allow the computation of the function with remarkable accuracy throughout the entire complex plane for any exterior wedge angle. 相似文献
146.
Weller T.M. Katehi L.P.B. Herman M.I. Wamhof P.D. Lee K. Kolawa E.A. Tai B.H. 《Microwave Theory and Techniques》1996,44(9):1603-1606
This paper describes recent results which pertain to the integration and reliability testing of micromachined, membrane-supported transmission line circuits. These circuits employ a 1.4-μm-thick dielectric membrane to support thin-film conducting lines above an air substrate. With regard to integration, the development of a Ka-band solid state power amplifier (SSPA) is presented. The design includes a membrane-supported Wilkinson power divider/combiner with 0.2 dB loss, along with a commercially available monolithic microwave/millimeter wave integrated circuit (MMIC) amplifier stage. Also reported are tests which investigated the survivability of membrane lines under space qualification conditions. No failures occurred as a result of thermal cycling and vibration testing at levels which reached 39.6 grms 相似文献
147.
K Wernars P Boerlin A Audurier EG Russell GD Curtis L Herman N van der Mee-Marquet 《Canadian Metallurgical Quarterly》1996,32(3):325-341
As part of a WHO multicenter study on Listeria monocytogenes subtyping methods the random amplification of polymorphic DNA (RAPD)-technique was evaluated. Six participants were asked to use a standard protocol to analyse a set of 80 L. monocytogenes strains. This set contained 22 groups of epidemiologically linked isolates and 11 pairs of duplicate strains. Using three different 10-mer primers the median reproducibility of the RAPD-results obtained by the six participants was 86.5% (range 0-100%). Failure in reproducibility was mainly due to results obtained with one particular primer. The number of epidemiological groups found to be homogeneous varied from 1-22 (median 16). However, for some groups an inhomogeneity was found by the majority of participants. The overall correlation between the results from the different participants ranged from 32 to 85%. 相似文献
148.
A collection of 40 Brucella strains, including 19 clinical B.canis isolates, was analyzed using ERIC-PCR and REP-PCR. PCR amplification using primers REP 1R-I and REP 2-I provided distinct patterns for Brucella spp. All Brucella strains could be discriminated at least to the species level. ERIC-PCR, employing ERIC 1R and ERIC 2 as primers was less discriminative for Brucella, only allowing a discrimination to the genus level with occasional discrimination between individual strains. It can be concluded that rep PCR is a promising fingerprinting method for the evaluation of an outbreak. 相似文献
149.
Yuh-Ming Shyy Javier Arroyo Stanley Y.W. Su Herman Lam 《The VLDB Journal The International Journal on Very Large Data Bases》1996,5(3):181-195
The OSAM*.KBMS is a knowledge-base management system, or the so-called
next-generation database management system, for non-traditional
data/knowledge-intensive applications. In order to define, query, and
manipulate a knowledge base, as well as to write codes to implement
any
application system, we have developed an object-oriented knowledge-base
programming language called K to serve as the high-level interface of
OSAM*.KBMS. This paper presents the design of K, its implementation, and its
supporting KBMS developed at the Database Systems Research and Development
Center of the University of Florida.
Edited by
Dennis McLeod. Received July 1992 / Accepted August
1995 相似文献
150.
Anand A. Kulkarni Herbert Herman Jon Almer Ulrich Lienert Dean Haeffner Jan Ilavsky Stacy Fang Paul Lawton 《Journal of the American Ceramic Society》2004,87(2):268-274
Demands for designing prime reliant, energy-efficient, and high-performance thermal barrier coatings (TBCs) in gas turbines have led to a growing interest toward comprehensive microstructural characterization. Here we investigate the novel use of high-energy X-rays for small-angle X-ray scattering (SAXS), together with wide-angle scattering and radiography, for the depth-resolved characterization of TBCs grown by electron beam physical vapor deposition (EB-PVD). The coating microstructure is found to consist of columns perpendicular to the substrate, extending through the thickness, with a [001] growth texture and significant intercolumnar porosity. In addition, overshadowing effects during deposition together with gas entrapment give rise to nanoscale intracolumnar porosity consisting of featherlike and globular pores. Radiography showed an increase in the total porosity, from 15% near the substrate to 25% near the coating surface, which is ascribed to an increase in the intercolumnar spacing at the top of the coating. By contrast, the small-angle scattering studies, which are sensitive to fine features, showed the pore internal surface area to be greatest near the substrate. 相似文献