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Now showing items 27982-28001 of 57070
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Isolation of Progenitors that Exhibit Myogenic/Osteogenic Bipotency In Vitro by Fluorescence-Activated Cell Sorting from Human Fetal Muscle
(Elsevier BV, 2014)Fluorescence-activated cell sorting (FACS) strategies to purify distinct cell types from the pool of fetal human myofiber-associated (hMFA) cells were developed. We demonstrate that cells expressing the satellite cell ... -
Isolation, Characterization, and Aggregation of a Structured Bacterial Matrix Precursor
(American Society for Biochemistry and Molecular Biology, 2013)Biofilms are surface-associated groups of microbial cells that are embedded in an extracellular matrix (ECM). The ECM is a network of biopolymers, mainly polysaccharides, proteins, and nucleic acids. ECM proteins serve a ... -
Isolation, Characterization, and Multipotent Differentiation of Mesenchymal Stem Cells Derived from Meniscal Debris
(Hindawi Publishing Corporation, 2016)This study aimed to culture and characterize mesenchymal stem cells derived from meniscal debris. Cells in meniscal debris from patients with meniscal injury were isolated by enzymatic digestion, cultured in vitro to the ... -
The Isolation, Differentiation, and Survival In Vivo of Multipotent Cells from the Postnatal Rat filum terminale
(Public Library of Science, 2013)Neural stem cells (NSCs) are undifferentiated cells in the central nervous system (CNS) that are capable of self-renewal and can be induced to differentiate into neurons and glia. Current sources of mammalian NSCs are ... -
Isomorphism and the Limits to African Public Financial Management Reform
(2009)Many reform results fall below expectations in the development arena, especially in the public sector. Do the reforms just need more time to work better, or should we adjust our expectations? In addressing this question, ... -
Isoprene Emissions in Africa Inferred from OMI Observations of Formaldehyde Columns
(European Geosciences Union, 2012)We use 2005–2009 satellite observations of formaldehyde (HCHO) columns from the OMI instrument to infer biogenic isoprene emissions at monthly 1 × 1° resolution over the African continent. Our work includes new approaches ... -
Isoprene Photooxidation via the Hydroperoxyl Pathway
(2015-01-23)Photooxidation of isoprene has a large influence on the oxidation capacity of the atmosphere and is a significant source of secondary organic material (SOM) of atmospheric particles. A quantitative understanding of isoprene ... -
Isotope effect in charge-transfer collisions of H with He^{+}
(American Physical Society (APS), 2011)We present a theoretical study of the isotope effect arising from the replacement of H by T in the charge-transfer collision H(n=2) + He+(1s) at low energy. Using a quasimolecular approach and a time-dependent wave-packet ... -
Isotope Effects in Complex Scattering Lengths for He Collisions With Molecular Hydrogen
(American Physical Society, 2010)We examine the effect of theoretically varying the collision-system reduced mass in collisions of He with vibrationally excited molecular hydrogen and observe zero-energy resonances for select atomic “hydrogen” masses less ... -
Isotopes, Ice Ages, and Terminal Proterozoic Earth History
(National Academy of Sciences, 1997)Detailed correlations of ancient glacial deposits, based on temporal records of carbon acid strontium isotopes in seawater, indicate four (and perhaps five) discrete ice ages in the terminal Proterozoic Eon. The close and ... -
Isotopic composition of stratospheric water vapor: Measurements and photochemistry
(American Geophysical Union, 2001)We present a photochemical model describing the changes in the isotopic composition of stratospheric water vapor that result from methane oxidation and reactions with O(D-1). We then compare model calculations with ... -
Isotopic composition of water in the tropical tropopause layer in cloud-resolving simulations of an idealized tropical circulation
(American Geophysical Union, 2010)The processes that fix the fractionation of the stable isotopologues of water in the tropical tropopause layer (TTL) are studied using cloud-resolving model simulations of an idealized equatorial Walker circulation with ... -
Isotopic Compositions of Carbonates and Organic Carbon from Upper Proterozoic Successions in Namibia: Stratigraphic Variation and the Effects of Diagenesis and Metamorphism
(Elsevier, 1991)The carbon isotope geochemistry of carbonates and organic carbon in the late Proterozoic Damara Supergroup of Namibia, including the Nama, Witvlei, and Gariep groups on the Kalahari Craton and the Mulden and Otavi groups ... -
Isotopic Constraints on the Late Archean Carbon Cycle from the Transvaal Supergroup along the Western Margin of the Kaapvaal Craton, South Africa
(Elsevier, 2009)Few existing studies illuminate the operation of the carbon cycle before the rise of atmospheric oxygen circa 2400 million years ago. Stable carbon isotopic measurements of shallow stromatolitic carbonates (~0 [parts per ... -
Isotropic 3D Super-resolution Imaging with a Self-bending Point Spread Function
(2014)Airy beams maintain their intensity profiles over a large propagation distance without substantial diffraction and exhibit lateral bending during propagation1-5. This unique property has been exploited for micromanipulation ... -
Isotropic local laws for sample covariance and generalized Wigner matrices
(Institute of Mathematical Statistics, 2014)We consider sample covariance matrices of the form X ∗X, where X is an M × N matrix with independent random entries. We prove the isotropic local MarchenkoPastur law, i.e. we prove that the resolvent (X ∗X − z) −1 converges ... -
Isotype-Specific Inhibition of the Phosphatidylinositol-3-Kinase Pathway in Hematologic Malignancies
(Informa UK Limited, 2014-02-21)In the last decade, the advent of biological targeted therapies has revolutionized the management of several types of cancer, especially in the realm of hematologic malignancies. One of these pathways, and the center of ... -
Israel in The New York Times Over the Decades: A Changed Narrative and Its Impact on Jewish Readers
(Shorenstein Center on Media, Politics and Public Policy, 2012-02)During the winter of 1974, Seymour Topping, the assistant managing editor of The New York Times, and his wife, Audrey, visited Jordan as part of a tour of the Middle East. On their stops in Egypt, Lebanon, Saudi Arabia ... -
Israel in Transition from Zionism to Post-Zionism
(Sage Publications, 1998)Since the original goals of Zionism have largely been accomplished or are less relevant today, conditions are ripe for Israel's transition from Zionism to post-Zionism. A post-Zionist Israel-while maintaining its Jewish ... -
Israel, Palestine, and the Last Four U.S. Presidencies: An In-Depth Analysis
(2017-01-09)The Israel-Palestine conflict is, at the same time, one of the most important challenges in international politics and one of the most difficult issues to solve. The problem is made worse by the fact that stakeholders ...