نتایج جستجو برای: r20

تعداد نتایج: 200  

2011
Erika G Meraz Homer Nazeran Carlos D Ramos Pat Nava Bill Diong Michael D Goldman Christine A Goldman

BACKGROUND Is Impulse Oscillometry System (IOS) a valuable tool to measure respiratory system function in Children? Asthma (A) is the most prevalent chronic respiratory disease in children. Therefore, early and accurate assessment of respiratory function is of tremendous clinical interest in diagnosis, monitoring and treatment of respiratory conditions in this subpopulation. IOS has been succes...

بابایی فینی،, ام السلمه, فتاحی, ابراهیم, قاسمی, الهه,

Global changes in extremes of the climatic variables that have been observed in recent decades can only be accounted anthropogenic, as well as natural changes. Factors are considered, and under enhanced greenhouse gas forcing the frequency of some of these extreme events is likely to change (IPCC, 2007 Alexander et al., 2007). Folland et al. (2001) showed that in some regions both temperature a...

2006
Jiří PETRŽELA Stanislav HANUS

This paper greatly extends the recently published experimental results obtained by means of the chaotic oscillator, which represents a modified Lorenz dynamical system. Very good final agreement between numerical analysis and practical measurements is prooved via a gallery of the oscilloscope screenshots. 1. Mathematical model First of all, let consider the following set of differential equatio...

Journal: :American journal of physiology. Regulatory, integrative and comparative physiology 2004
David Julian Christiaan Leeuwenburgh

THE AGING PROCESS RESULTS in an accelerated decline of functional capacity, but the mechanisms behind this decline are unclear (21, 22). The free radical theory of aging proposes that mitochondrial production of reactive oxygen species (ROS) causes an increase in cellular damage with age (9, 10). This theory has gained strong support because it is consistent with many of the processes and degen...

Journal: :Electr. J. Comb. 1996
Asad Ali Ali William Staton

Connected graphs with minimum degree δ and at least 2δ+ 1 vertices have paths with at least 2δ + 1 vertices. We provide a characterization of all such graphs which have no longer paths. Extremal problems involving paths and cycles have been considered since the infancy of graph theory. The question which interests us here is the question of what minimum degree condition guarantees a path of a p...

Journal: :Journal of Propulsion and Power 2022

No AccessTechnical NotesWall Ion Loss Reduction by Acceleration Zone Shifting in Anode-Layer Hall ThrusterRei Kawashima, Yushi Hamada, Shu Kawabata, Kimiya Komurasaki and Hiroyuki KoizumiRei Kawashima https://orcid.org/0000-0002-5844-9340The University of Tokyo, Tokyo 113-8656, Japan*Assistant Professor, Department Aeronautics Astronautics; . Member AIAA.Search for more papers this author, Hama...

2006
Thomas E. Staley David K. Brauer

Maintaining threshold populations of inoculum microorganisms in the soil environment is important for such practical applications as biocontrol, plant growth-promotion, bioremediation, and nodulation. However, because of both technical and labor constraints in monitoring bacterial viability in nonsterile soils, few studies have reported on survival kinetics, particularly in relation to subtle a...

Journal: :Structure 2021

•The specificity of a glutaminase subunit for synthase has been inverted•The switch was achieved by both computational and data-driven approach•The designed complexes were stable catalytically active The formation specific protein in cell is non-trivial problem given the co-existence thousands different polypeptide chains. A particularly difficult case are two glutamine amidotransferase (anthra...

2004
THOMAS E. SHRADER DONALD M. CROTHERS

We have used the emerging rules for the sequence dependence of DNA bendability to design and test a series of DNA molecules that incorporate strongly into nucleosomes. Competitive reconstitution experiments showed the superiority in histone octamer binding of DNA molecules in which segments consisting exclusively ofA and T or G and C, separated by 2 base pairs (bp), are repeated with a 10-bp pe...

2006
Joseph A. DiMicco Dmitry V. Zaretsky

id 13940&is_tech 0] 49. DiMicco JA, Soltis RP, Anderson JJ, and Wible JH Jr. Hypothalamic mechanisms and the cardiovascular response to stress. In: Central Neural Mechanisms in Cardiovascular Regulation, vol. II, edited by Kunos G and Ciriello J, Boston, MA: Birkhauser, 1992, p. 52–80. 50. DiMicco JA, Samuels BC, Zaretskaia MV, and Zaretsky DV. The dorsomedial hypothalamus and the response to s...

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