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  • 42.65
  • Calcium
  • Springer  (10)
  • Cambridge University Press
  • Frontiers Media
  • 2020-2022
  • 1980-1984
  • 1975-1979  (10)
  • 1976  (10)
Collection
Keywords
Publisher
  • Springer  (10)
  • Cambridge University Press
  • Frontiers Media
Years
  • 2020-2022
  • 1980-1984
  • 1975-1979  (10)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Index modulation and spatial harmonic generation in dichromated gelatin films (1976)
    Springer
    Applied physics 10 (1976), S. 41-51 
    Details
    ISSN: 1432-0630
    Keywords: 42.65 ; 42.30
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A model for volume hologram formation in thick dichromated gelatin films is given. Using the model and a few basic film measurements, we can quantify the index modulation vs. exposure curve. The effects of saturation and dynamic absorption increase during exposure are considered in the generation of spatial harmonics. The effects of exposure with non-unity beam-ratio and multiple incoherent exposures are predicted and experimentally verified. The thick transmission grating diffraction efficiencies resulting from first-and higher-order index modulations are calculated and compared to experiments. The methods and conclusions are applicable to other phase materials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00929527
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  • 2
    Electronic Resource
    Electronic Resource
    Nonlinear optical effects for plasma diagnostics (1976)
    Springer
    Applied physics 11 (1976), S. 147-151 
    Details
    ISSN: 1432-0630
    Keywords: 52 ; 42.65 ; 32
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We compare two nonlinear optical effects which show promise of yielding directly plasmon frequencies, damping rates, and intensities in small, transient (submicrosecond) plasmas. The Raman-induced Kerr effect is shown to offer significant advantages over three-wave mixing when the plasma screening length is much smaller thanc÷[plasmon frequency]. When the screening length is much smaller than the optical wavelengths, then the former effect can yield an electron-density fluctuation spectrum with laser powers (∼MW) that are readily available.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00920594
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  • 3
    Electronic Resource
    Electronic Resource
    Efficient frequency doubling of cw dye laser radiation (1976)
    Springer
    Applied physics 11 (1976), S. 97-101 
    Details
    ISSN: 1432-0630
    Keywords: 42.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract An efficient conversion of the tunable cw dye laser radiation to the UV region was achieved by intracavity SHG. The conversion efficiency depends strongly on the total cavity loss. This paper gives a survey on conventional and thermally induced loss mechanisms and discusses ways of loss reduction. A system is described that yields 50 mW and 4 mW of tunable UV radiation in multimode and single mode operation, respectively, where the wavelength can be varied from 285–315 nm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00895022
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  • 4
    Electronic Resource
    Electronic Resource
    Passive mode locking of a ruby laser using a birefringent crystal and a fractional-commensurate cavity length (1976)
    Springer
    Applied physics 11 (1976), S. 171-174 
    Details
    ISSN: 1432-0630
    Keywords: 42.60 ; 42.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Mode-locked operation has been observed in a Q-switched, ruby laser using a quartz crystal as the passvie mode-locking element and a laser cavity length which is a whole fraction of that which is commensurate in mode-frequency spacing with the lowfrequency stimulated Brillouin scattering (lf S BS) in the crystal element. In addition, high-bit-rate operation has been observed, suggesting that the passive modulation of the lf S BS process is sufficiently strong to maintain a fixed-phase relation between several neighboring oscillating modes of the laser.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00920599
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  • 5
    Electronic Resource
    Electronic Resource
    Difference frequency generation in proustite from 11 to 23 μm (1976)
    Springer
    Applied physics 11 (1976), S. 137-140 
    Details
    ISSN: 1432-0630
    Keywords: 42.65 ; 78.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Tunable infrared radiation was produced in the spectral range 11 μm to 23 μm by nonlinear mixing of two ruby-pumped dye lasers in proustite. A peak power of about 3 watts was observed at 19 μm. A 7o crystal angle was sufficient to achieve phase matching over the entire wavelength range. Ordinary wave absorption measurements in proustite correlate well with the observed difference frequency output, once allowance has been made for the convergence of the dye laser beams.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00920592
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  • 6
    Electronic Resource
    Electronic Resource
    Frequency synthesis of the 0.63 μm radiation by mixing of three IR radiation frequencies in a gas (1976)
    Springer
    Applied physics 11 (1976), S. 163-165 
    Details
    ISSN: 1432-0630
    Keywords: 42.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The present paper offers a scheme of synthesis and measurement of frequency of 0.63 μm laser radiation based on mixing of three frequencies of a cascade He-Ne laser generating simultaneously the three lines: 3.39, 2.39, and 1.15 μm. Reported is an experimental observation of coherent radiation with a wavelength of 0.63 μm arising in mixing of the three frequencies in a gas. The effective frequency transformation was performed at the nonlinear interaction of three fields resonant with coupled transitions in neon. Due to the resonance conditions an efficiency of the frequency transformation in a gas proved to be 8–10 orders higher than that in nonlinear optical crystals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00920597
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  • 7
    Electronic Resource
    Electronic Resource
    Generation of tunable cw infrared radiation by difference frequency mixing (1976)
    Springer
    Applied physics 11 (1976), S. 363-370 
    Details
    ISSN: 1432-0630
    Keywords: 42.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Tunable cw infrared radiation has been generated by noncollinear difference frequency mixing in LiIO3, using the output of an argon ion laser at 514 nm or 488 nm and the intracavity radiation of a Rhodamine 6 G dye laser. Infrared powers up to 4 μW in multimode and 0.5 μW in single-mode operation tunable in the range of 2.3 μm to 4.6 μm have been obtained. Properties and possibilities of the noncollinear mixing geometry and the intracavity mixing system are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00919365
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  • 8
    Electronic Resource
    Electronic Resource
    Effect of calcium depletion and subsequent repletion on parathyroids, parafollicular (C) cells and bone in the growing pig (1976)
    Springer
    Cell & tissue research 168 (1976), S. 373-384 
    Details
    ISSN: 1432-0878
    Keywords: Calcium ; Bone ; Parathyroid ; Parafollicular cells ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The ultrastructure of the chief cells of the parathyroid gland and thyroid parafollicular (C) cells and the morphology of bone in calcium depletion and subsequent repletion were examined in young growing pigs. A low calcium diet resulted in osteopenia, increased removal of the cartilaginous core, osteoclasia and osteocytic osteolysis. Subsequent repletion quickly returned bone to normal. In pigs fed the low calcium diet, there was a marked depletion of secretory granules but a striking increase in the number of microtubules in chief cells. Increasing the calcium content of the diet to normal quickly returned the ultrastructural appearance of chief cells to apparent normal. In the initial response to calcium repletion, chief cells exhibited large number of lysosomes and occasionally prominent paracrystalloid bodies. Electron microscopic examination of parafollicular (C) cells of the thyroid gland failed to reveal differences in ultrastructure between test and control pigs. These findings support the view that bone resorption following calcium deficiency may be the result of a secondary hyperparathyroidism rather than of calcium deficiency per se.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00215314
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  • 9
    Electronic Resource
    Electronic Resource
    The subcellular localization of calcium in vertebrate smooth muscle: Calcium-containing and calcium-accumulating structures in muscle cells of mouse intestine (1976)
    Springer
    Cell & tissue research 169 (1976), S. 221-231 
    Details
    ISSN: 1432-0878
    Keywords: Smooth muscle ; Calcium ; Sarcoplasmic reticulum ; Mitochondria ; Microprobe analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The intracellular localization of calcium by means of cytochemical techniques was studied in smooth muscle cells of mouse intestine. When the lead acetate method according to Carasso and Favard (1966) was used calcium was found in mitochondria and sarcoplasmic reticulum and occasionally between the myofilaments. The active ATP-dependent accumulation of calcium into cell structures was investigated by the oxalate method (Heumann and Zebe, 1967). After appropriate treatment the only structures of smooth muscle cells which contained calcium oxalate (identified by microprobe analysis) were elements of the sarcoplasmic reticulum. The results are discussed in relation to the role of calcium in the control of muscle activity during the contraction-relaxation cycle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00214210
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  • 10
    Electronic Resource
    Electronic Resource
    The effect of the ionophore A23187 on the ultrastructure and electrophysiological properties of frog skeletal muscle (1976)
    Springer
    Cell & tissue research 173 (1976), S. 193-209 
    Details
    ISSN: 1432-0878
    Keywords: Muscle ; Ionophore A23187 ; Calcium ; Muscular dystrophy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The divalent cation ionophore A23187 has three major effects on the thin cutaneous pectoris muscle of frog: (1) The membrane potential is depolarized, an action that is found only when the [Ca2+] of the bathing saline is very low. (2) It causes an increase in resting tension and the development of contraction. This action is produced at both normal and low values of [Ca2+]o and is, therefore, independent of Ca2+ entry and of changes in Em. The ionophore is believed to act primarily by releasing Ca2+ from intracellular stores. (3) It causes major ultrastructural damage to the muscle filaments. It is believed that this damage is the result of the action of A23187 on the sarcoplasmic reticulum and the elevation of [Ca2+]i and we suggest that the action of this ionophore may serve as a useful model for the study of certain myopathies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221375
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