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  • 1
    Electronic Resource
    Electronic Resource
    Binocular interaction in the superior colliculus of chronic cats (1973)
    Springer
    Experimental brain research 18 (1973), S. 531-547 
    Details
    ISSN: 1432-1106
    Keywords: Visual neurones ; Superior colliculus ; Binocular interaction ; Chronic cats
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Effects of monocular and binocular stimulations upon cells of the superficial layer (superficial grey and optic strata) of the superior colliculus (SC) were studied in chronic cats with painless head fixation. They responded vigorously to moving stimuli (a 2° wide black stripe or a light slit of the same width, both moving at 40–100°/sec). Most cells were directionally selective and binocularly driven usually with a contralateral ocular dominance. In a sample of 71 cells the five types of binocular interaction were found. In 36 units (50.7%) the response to binocular stimulation was larger than the sum of the responses to monocular stimulation of both eyes (facilitation) and in 12 units (16.7%) the reverse was true (occlusion). In 7 units (9.9%) the binocular response was equal to the sum of the two monocular responses (summation). In 11 units (15.5%) the binocular response was smaller than the response to dominant eye stimulation (inhibition). In 5 units (7.0%) whose background discharges were suppressed by monocular stimulation of one eye or both suppression became less marked for binocular stimulation (disinhibition). The most common type of binocular interaction was facilitation in the units with a clear ocular dominance and it was summation or occlusion in the units lacking ocular dominance. Facilitatory and inhibitory binocular interactions were more frequently seen in the directionally selective units than in the directionally non-selective ones
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00234136
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  • 2
    Electronic Resource
    Electronic Resource
    Electrical conductivity of lunar surface rocks and chondritic meteorites (1971)
    Springer
    Earth, moon and planets 2 (1971), S. 408-422 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The electrical conductivities of several samples from returned Apollo 11 and 12 lunar rocks and from chondritic meteorites were measured from 300 to 1100K. Collectively the lunar samples represent all three of the major NASA classifications of lunar surface rocks. Of general interest is the observation that the conductivities of the lunar samples are much larger than the values which have previously been used in theoretical discussions of lunar phenomena. It is also found that the conductivity at 300K,σ (300), is extremely sensitive to the thermal history of the sample for both lunar and meteoritic material. Magnetic measurements are presented to help characterize the changes which occur upon heating.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00562878
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  • 3
    Electronic Resource
    Electronic Resource
    Supplemental studies on the method for electron microscopic demonstration of lipase in the pancreatic acinar cells of mice and rats (1972)
    Springer
    Histochemistry and cell biology 29 (1972), S. 8-15 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The method for electron microscopic demonstration of lipase which was previously reported by the present authors was supplementally studied on the prefixation and substrate in normal animals as well as in animals with experimental pancreatitis. As for the fundamental techniques, no significant difference was observed between the concentrations of the glutaraldehyde for prefixation, neither the kinds of Tweens used, while a significant difference was observed between the duration of incubation. A longer incubation (16–18 hours) brought about larger end products, a shorter incubation (1–3 hours) smaller products. In the animals with experimental pancreatitis, the lipase activity observed in endoplasmic reticulum and Golgi apparatus was not changed as compared with the normal controls, while the activity in secretory granules and glandular lumen decreased. Furthermore, the lipase activity appeared in focal cytoplasmic degradation and around lipid droplets which were not found in the normal controls.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00305696
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  • 4
    Electronic Resource
    Electronic Resource
    Electron microscopic radioautography of intramitochondrial RNA synthesis of HeLa cells in culture (1972)
    Springer
    Histochemistry and cell biology 32 (1972), S. 163-170 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary HeLa cells were cultivated in vitro and incubated in a medium containing 3H-uridine (20 μc/ml) for 30 minutes 1, 2, 4, 8 and 18 hours, doubly fixed with 2.5% glutaraldehyde and 1% osmium tetroxide, embedded in Epon or hydroxypropyl methacrylate, radioautographed with Sakura NR-H2 emulsion, exposed for 40 days, developed with gold-latensification and elon-ascorbic acid developer. As the results, silver grains appeared not only in the chromatin, nucleoli, endoplasmic reticulum and ribosomes but also in the mitochondria. Most of the silver grains found in the mitochondria were localized on the mitochondrial matrix, while some others were on the cristae and the mitochondrial membranes. These silver grains were removed with RNase digestion. The percentage of labeled mitochondria increased in accordance with the time of incubation. Almost all the mitochondria were labeled within 18 hours. From the results, it was concluded that the mitochondria synthesized RNA at their matrices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00303731
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  • 5
    Electronic Resource
    Electronic Resource
    Nachweis und Typenbestimmbarkeit der sauren Erythrocytenphosphatase in Blutspuren (1970)
    Springer
    International journal of legal medicine 67 (1970), S. 359-363 
    Details
    ISSN: 1437-1596
    Keywords: Blutspuren ; Saure Erythrocytenphosphatase in Blut ; Spuren ; Spurenunterauchungen, SEP
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Description / Table of Contents: Zusammenfassung 1. Die Angaben Heidels sind nicht zu bestätigen. 2. Die Typenbestimmbarkeit der SEP steht in Abhängigkeit von der Trocknungszeit der Blutspuren, der Menge des vorzulegenden Untersuchungsmaterials, dem Spurenträger. 3. Die Variablen wurden dargestellt, die Ergebnisse tabellarisch festgehalten. 4. Wir machten die Erfahrung, daßSpuren, die nach Asservierung sofort in die Kältetruhe (−40°C) gebracht werden, längere Zeift verwertbare Resultate erzielen lassen. Spuren, die bereits den größten Teil ihrer Aktivität bei Zimmertemperatur verloren hatten, können durch die Kälte nicht reaktiviert werden. Wenn Blutspuren jedoch längstens bis 8 Std bei 20–24° C getrocknet, sofort asserviert und unmittelbar, z.B. am Wochenende, in −40° C überführt werden, dürfte am Montag ein Ergebnis noch zu erzielen sein. Radam und Strauch (1966) werden insoweit bestätigt, als die Aktivitätshaltbarkeit des Enzyms in tiefer Temperatur größer ist.
    Notes: Summary The limits of the SEP identification in the blood spots under various circumstances i.e. the dependence on blood quantity, temperature, and carrier have been studied. Heidel's statement that she has been able to identify the SEP in 30 days old spots could not be confirmed. In our own experiments we have been able to identify the SEP in 32 hours old blood stains using 20 mg of dry blood substance. The deep temperature (−40°C) gives better results and from criminalistics point of view we recommend the preservation of the specimens under such conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02083042
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  • 6
    Electronic Resource
    Electronic Resource
    Lunar rock magnetism (1972)
    Springer
    Earth, moon and planets 4 (1972), S. 160-186 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The relationship between the magnetization and temperature in a high constant magnetic field for a temperature range between 5 K and 1100 K was examined for Apollo 11, 12 and 14 lunar materials. The average value of Curie point temperature is (768.2 ± 3.5)°C for the lunar igneous rocks and (762.5 ± 3.4)°C for the lunar fines and breccias. A tentative conclusion about the ferromagnetic substance in the lunar materials would be that Fe is absolutely dominant with a slight association of Ni and Co, and probably Si also, in the lunar native irons. The antiferromagnetic phase of ilmenite and the paramagnetic phase of pyroxenes are considerably abundant in all lunar materials. However, a discrepancy of observed magnetization from a simulated value based on known magnetic elements for the temperature range between 10 and 40 K suggests that pyroxene phase represented by (M x Fe1-x ) SiO3 (whereM = Ca2+, Mg2+, etc and 0 ≤x ≤1/4) also may behave antiferromagnetically. Magnetic hysteresis curves are obtained at 5 K and 300 K, and the viscous magnetic properties also are examined for a number of lunar materials. The superparamagnetically viscous magnetization has been experimentally proven as due to fine grains of metallic iron less than 200 Å in mean diameter. The viscous magnetization is dominant in the lunar fines and breccias which is classified into Type II, while it is much smaller than the stable magnetic component in lunar igneous rocks (Type I). The superparamagnetically fine particles of metallic iron are mostly blocked at 5 K in temperature; thus coercive force (H c ) and saturation remanent magnetization (I R ) become much large at 5 K as compared with the corresponding values at 300 K. Strongly impact-metamorphosed parts of lunar breccias have an extremely stable NRM which could be attributed to TRM. NRM of the lunar igneous rocks and majority of breccias (or clastic rocks) are intermediately stable, but their stability is considerably higher than that of IRM of the same intensity. This result may imply that some mechanism which causes an appreciable magnitude of NRM and the higher stability, such as the shock effect, may take place on the lunar surface in addition to TRM mechanism for special cases. A particular igneous rock (Sample 14053) is found to have an unusually strong magnetism owing to a high content of metallic iron (about 1 weight percent), and its NRM amounts to 2 × 10−3 emu/g. The abundance of such highly magnetic rocks is not known as yet but it seems that the observed magnetic anomalies on the lunar surface could be related to such highly magnetized rock masses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00562924
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