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  • 1995-1999  (1,408)
  • 1985-1989
  • 1999  (777)
  • 1995  (631)
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  • 1995-1999  (1,408)
  • 1985-1989
Year
  • 1
    Monograph available for loan
    Monograph available for loan
    Formation of mafic-ultramafic rocks in the crust : need for a New Upper Mantle (1999)
    Zaragoza : Institucion "Fernando el Catolico"
    Details Availability
    Call number: M 99.0197
    Type of Medium: Monograph available for loan
    Pages: iv, 441 S.
    ISBN: 8478204849
    Classification:
    Petrology, Petrography
    Language: English
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    Fast movable remotely controlled Langmuir probe system : Proceedings of the 12th topical conference on high temperature plasma diagnostics (1999)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 70 (1999), S. 415-418 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A versatile remotely controlled fast reciprocating Langmuir probe has been developed for the TJ-II stellarator. The main components of the system are a removable head, containing the measurement tips, and a displacement system that enables the probe to be displaced in vacuum. The probe displacement system has two different components: a slow one (course length≤0.8 m) to set the probe at the initial measurement position, and a fast one (run length=0.1 m) to obtain the desired measurements within an adjustable time interval during the plasma discharge. The radial movement of the probe is controlled remotely by means of a programmable logical control system, with a radial resolution of better than 1 mm. The fast displacement of the probe (up to 1.7 m/s) is achieved by using a pneumatic system. Its position as a function of time is monitored by means of the on-line response of a linear resistor attached to the fast displacement system. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1149350
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  • 3
    Electronic Resource
    Electronic Resource
    Spectrum analyzer for low magnetic field (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 5355-5359 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A device to obtain an estimate of the spectrum of a time-variable magnetic field has been developed. The amplitude of each spectral component of the magnetic field series is obtained by analyzing with a double demodulation technique the signal generated from a flux-gate-like detector operating in open loop configuration. This device shows a sensitivity of about 1 mV/nT in the range from 0 to 300 Hz. For frequencies higher than 300 Hz the sensitivity decreases, and a correction factor that depends on the transfer function of the electronic device must be applied. The present device can be applied to environmental measurements, industrial applications, traffic control, and scientific research. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1146477
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  • 4
    Electronic Resource
    Electronic Resource
    Magnetization processes in samples with modulated anisotropy under the action of nonuniform magnetic fields (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 3961-3964 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In this paper we study the magnetic behavior of amorphous ferromagnetic ribbons having helical anisotropy with the helix axis perpendicular to the sample surface. It is shown that the magnetization processes under the action of a longitudinal magnetic field can be controlled by the nonuniform field produced by an alternating current, of the same frequency than the exciting field, flowing through the sample. Hysteresis loops with very different susceptibilities and coercive fields have been obtained by varying the amplitude of the current intensity and the phase differences between the exciting magnetic field and the current through the sample. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.359917
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  • 5
    Electronic Resource
    Electronic Resource
    A STEPWISE PROCEDURE TO DESIGN PLUVIAL DRAINAGE SYSTEMS IN AGRICULTURAL ZONES (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 31 (1995), S. 0 
    Details
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: : This paper describes a procedure to design pluvial drainage systems in such a way as to prevent large excavation volumes and erosive velocities. To this end the storage capacity of the channel system is taken into account. In a preliminary step, the procedure employs an approximate method to determine the channel dimensions. Therefore, the dimensions are adjusted by means of a numerical method of solution of the unsteady flow equations. An example is included.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1752-1688.1995.tb03373.x
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  • 6
    Electronic Resource
    Electronic Resource
    Influence of leaching rates on 14C-metolachlor mobility (1995)
    Springer
    Bulletin of environmental contamination and toxicology 54 (1995), S. 562-569 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00192600
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  • 7
    Electronic Resource
    Electronic Resource
    Influence of Skeletal Site of Origin and Donor Age on Osteoblastic Cell Growth and Differentiation (1999)
    Springer
    Calcified tissue international 64 (1999), S. 280-286 
    Details
    ISSN: 1432-0827
    Keywords: Key words: Human osteoblastic cells — Skeletal site — Aging.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract. Bone loss with aging may be due, at least in part, to inadequate bone formation. Moreover, the process of bone aging is known to follow a different pattern throughout the skeleton. In this study, we examined the cell proliferation rate (area under the cell growth curve, AUC) and the secretion of C-terminal type I procollagen (PICP), alkaline phosphatase (ALP), and osteocalcin (OC) in primary cultures of osteoblastic cells from human trabecular bone. Osteoblastic cells were obtained for 168 donors (100 women and 68 men). Ninety-eight bone samples were obtained from subjects undergoing knee arthroplastia, 52 aged 50–70 years (64 ± 5) and 46 over age 70 (73 ± 2). Another 70 bone samples were obtained from subjects undergoing hip arthroplastia; 51 were 50–70 years old (64 ± 4) and 19 were over 70 (75 ± 5). Osteoblastic cells from the older donors had a lower proliferation rate and OC secretion than those from younger subjects. However, ALP secretion was higher in the former subjects, whereas PICP secretion was unchanged. Osteoblastic cells from hip had a lower proliferation rate than those from knee. PICP secretion was also lower and ALP secretion was higher in the former cells. In age-matched cell cultures, osteoblastic cells from the knee had higher proliferation rate and PICP secretion than osteoblastic cells from the hip. However, ALP secretion was lower in knee osteoblastic cells than those from hip only in the younger group. With aging, ALP secretion was found to increase in knee osteoblactic cells, whereas OC secretion decreased in osteoblastic cell cultures from the hip. Our findings suggest that bone loss with aging may be accounted for, at least in part, by a decreased osteoblastic cell proliferation and an increased osteoblastic maturation. In addition, our data indicate that these changes with aging do not occur similarly at different skeletal sites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002239900619
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  • 8
    Electronic Resource
    Electronic Resource
    A Long-Term Blockade of L-Type Calcium Currents Upregulates the Number of Ca2+ Channels in Skeletal Muscle (1999)
    Springer
    The journal of membrane biology 168 (1999), S. 141-148 
    Details
    ISSN: 1432-1424
    Keywords: Key words: Ca2+ channels — DHP receptors — Upregulation — Skeletal muscle — Channel blockers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract. The effects of a long-term blockade of L-type Ca2+ channels on membrane currents and on the number of dihydropyridine binding sites were investigated in skeletal muscle fibers. Ca2+ currents (I Ca) and intramembrane charge movement were monitored using a voltage-clamp technique. The peak amplitude of I Ca increased by more than 40% in fibers that were previously incubated for 24 hr in solutions containing the organic Ca2+ channel blocker nifedipine or in Ca2+-free conditions. A similar incubation period with Cd2+, an inorganic blocker, produced a moderate increase of 20% in peak I Ca. The maximum mobilized charge (Q max) increased by 50% in fibers preincubated in Ca2+-free solutions or in the presence of Cd2+. Microsomal preparations from frog skeletal muscle were isolated by differential centrifugation. Preincubation with Cd2+ prior to the isolation of the microsomal fraction doubled the number of 3H-PN200-110 binding sites and produced a similar increase in the values of the dissociation constant. The increase in the number of binding sites is consistent with the increase in the peak amplitude of I Ca as well as with the increase in Q max.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002329900504
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  • 9
    Electronic Resource
    Electronic Resource
    Variation of fatty acid profile with solar cycle in outdoor chemostat culture ofIsochrysis galbana ALII-4 (1995)
    Springer
    Journal of applied phycology 7 (1995), S. 129-134 
    Details
    ISSN: 1573-5176
    Keywords: chemostat culture ; Isochrysis galbana ; fatty acids ; solar cycle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Outdoor chemostat cultures of the marine microalgaIsochrysis galbana at constant dilution rate (0.034 h−1 ) have been carried out under different weather conditions. Steady-state biomass concentrations were 1.61±0.03 kg m−3 in May and 0.95±0.04 kg m−3 in July, resulting in biomass output rates of 0.54 kg m−3 d−1 and 0.32 kg m−3 d−1 in May and July, respectively. Two patterns of daily variation with the solar cycle were observed in the fatty acid content. Saturated and mono-unsaturated fatty acids (16:0 and 16:1n7) show significant variation with the solar cycle, associated with short-term changes in environmental factors. Palmitic and palmitoleic acids are generated during daylight and consumed during the dark period. However, polyunsaturated fatty acids do not show a significant response to the solar cycle and their changes are associated with long-term variation in environmental factors. The maximum EPA productivity was obtained in May, 14.1 g m−3 d−1, which is close to that found in the literature for indoor continuous cultures. Nonetheless, the outdoor EPA content (up to 2.61 % d.wt) was lower than the indoor EPA content from a previous study (5% d.wt).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00693058
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  • 10
    Electronic Resource
    Electronic Resource
    Location of Prunus Necrotic Ringspot Ilarvirus Within Pollen Grains of Infected Nectarine Trees: Evidence from RT-PCR, Dot-blot and in situ Hybridisation (1999)
    Springer
    European journal of plant pathology 105 (1999), S. 623-627 
    Details
    ISSN: 1573-8469
    Keywords: anthers ; ilarvirus ; PNRSV ; pollen transmission
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Prunus necrotic ringspot Ilarvirus (PNRSV) is a pollen and seed-borne ilarvirus affecting most Prunus spp. The location of the virus in infected nectarine pollen grains was investigated by molecular hybridisation, RT-PCR and in situ hybridisation. The first two approaches revealed an internal location of the virus. In situ hybridisation demonstrated the virus in the bicellular pollen grain, where it was present in the cytoplasm of the vegetative cell but not in the generative cell. This result seems to indicate that the sperm cells, formed by the mitosis of the generative cell, are not involved in virus transmission to seed. Other possible mechanisms are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008783705183
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