Results 221 to 230 of about 612,558 (267)
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Canadian Journal of Biochemistry and Physiology, 1957
Null
A F, HOWATSON, A W, HAM
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Null
A F, HOWATSON, A W, HAM
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On the fine structure of polyribosomes
Cell and Tissue Research, 1977The ultrastructural morphology of ribosomes was studied in tissue sections of rat uterus using defferent fixatives (acrolein formaldehyde, acetic acid, methanol-acetic acid, OsO4) after various pre-incubations in solutions of different osmolarity, electrolyte content, and pH.
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Fine structure of myomedulloblastoma
Acta Neuropathologica, 1977Electronmicroscopic studies in a case of myomedulloblastoma support the concept that the medulloblastoma and the myoblastoma component of the tumor derive drom different cell lines. The myoblastoma component shows bundles of myogenic elements, whereby quite undifferentiated cells lacking myofilaments are tightly attached to differentiated elements ...
R, Stahlberger, R L, Friede
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Nature, 1964
PREVIOUSLY, investigations of sectioned material have provided extremely valuable information regarding the ultrafine structure of keratin1,2. However, little if any information has been forthcoming regarding the axial organization of the microfibril. This, in part, may be attributed to the large depth of focus of the electron microscope coupled with ...
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PREVIOUSLY, investigations of sectioned material have provided extremely valuable information regarding the ultrafine structure of keratin1,2. However, little if any information has been forthcoming regarding the axial organization of the microfibril. This, in part, may be attributed to the large depth of focus of the electron microscope coupled with ...
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Measuring the fine structure constant, α, using helium fine structure
Proceedings of Conference on Precision Electromagnetic Measurements Digest, 1995The fine structure of the 2/sup 3/S-2/sup 3/P transition in helium has been precisely measured using laser excitation of an atomic beam. The results give /spl alpha//sup -1/=137.035 853 (3) (7) (99). The three values of standard deviation are from the uncertainty in the measured atomic frequency interval, the total experimental error (including the ...
D.L. Shiner, R. Dixson
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2009
F Robert Karplus and Norman Kroll first attempted this type of calculation using Feynman’s diagrams soon after learning the new techniques from Dyson [2]. Eight years later, several other physicists found a few algebraic errors in the calculation, whose correction only affected the fifth decimal place of the original answer.
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F Robert Karplus and Norman Kroll first attempted this type of calculation using Feynman’s diagrams soon after learning the new techniques from Dyson [2]. Eight years later, several other physicists found a few algebraic errors in the calculation, whose correction only affected the fifth decimal place of the original answer.
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Fine Structural Changes of the Liver.
Annals of Internal Medicine, 1963Excerpt The fine structural study of the normal and abnormal liver has brought to light many new structures, some that occur in every cell, and others, only erratically.
H, POPPER, F, SCHAFFNER
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The fine structure constant from helium fine structure
Physics Letters A, 1976New theoretical values of the 23P fine structure splittings in helium are presented. If QED is assumed valid, the experimental values of the splittings combined with theory yield a value for the fine structure constant accurate to 0.94 ppm.
M.L. Lewis, P.H. Serafino, V.W. Hughes
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Zeitschrift für Physik D Atoms, Molecules and Clusters, 1997
The energies of the As− fine structure components 4p43P1 and 4p43P0 have been determined relative to the 4p43P2 ground state by using photodetachment electron spectroscopy. Fine structure splittings of ΔE(3P1 − 3P2) = 125(3) meV and ΔE(3P0 − 3P2) = 166(5) meV have been obtained.
G. Haeffler +3 more
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The energies of the As− fine structure components 4p43P1 and 4p43P0 have been determined relative to the 4p43P2 ground state by using photodetachment electron spectroscopy. Fine structure splittings of ΔE(3P1 − 3P2) = 125(3) meV and ΔE(3P0 − 3P2) = 166(5) meV have been obtained.
G. Haeffler +3 more
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Fine Structure of the Autophagosome
2008This chapter describes the electron microscopic fine structure of early and late autophagic vacuoles in mammalian cells. Detailed instructions are given for the preparation of cells for conventional electron microscopy and for the identification of autophagic vacuoles by morphology.
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