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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 7820-7824 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The lateral Goos–Hänchen1 beam shift of a monochromatic plane wave incident from a denser magneto-optical surface medium to a rarer magneto-optical surface medium is theoretically investigated using Maxwell's theory. We found a large but nondivergent enhancement in the beam displacement as the angle of incidence approaches critical angle.
    Type of Medium: Electronic Resource
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  • 2
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    Unknown
    Baltimore : Periodicals Archive Online (PAO)
    Human Biology. 39:2 (1967:May) 182 
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 160 (1960), S. 431-437 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The properties of the non-relativistic propagation of a plane shock wave in a gas mixture of charged particles in the presence of an external uniform magnetic field, oriented in a direction transverse to the direction of propagation, are studied. Expressions for the pressure, density and velocity ratios are obtained. It is shown that the presence of a transverse magnetic field narrows down the range of values of the density ratio.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 217 (1981), S. 569-576 
    ISSN: 1432-0878
    Keywords: Autoradiography ; 3H-proline ; Osteoblasts ; Denervation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The inferior alveolar nerve was unilaterally resected in 30-day-old mice; other animals were unilaterally sham-operated. At 15, 30, 60, 90, or 150 days after surgery, the mice were injected with 2μCi of 3H-proline (sp. act. 1.0 Ci/mM) per g of body weight and killed 15, 30, or 60 min later. Autoradiographs were prepared from 5μm decalcified sagittal sections of mandibles and grain counts made over periosteal osteoblasts mesial to the first molar. In denervated mandibles, osteoblasts incorporated less isotope compared to controls with differences being maximal at the early intervals. These differences became attenuated with time, possibly due to an intrinsic compensatory mechanism, secondary to neurotrophic regulation.
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  • 5
    ISSN: 1432-0878
    Keywords: Autoradiography ; 3H-proline ; Osteoblasts ; Sympathectomy ; Guanethidine-sulfate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Sympathectomy was carried out in rats by injections of guanethidine-sulfate from birth to 14 days of age. At 45 days of age, the activity of osteoblastic cells was monitored by 3H-proline autoradiography. Effectiveness of sympathectomy was verified by light-microscopic examination of superior cervical and celiac ganglia. Grain counts over periosteal osteoblasts of the femoral diaphysis and osteoblasts mesial to the first molar in the mandible demonstrated a significantly reduced uptake of 3H-proline in the sympathectomized rats. The data provide direct evidence of sympathetic influence on osteoblastic activity and suggest that sympathectomy may result in the loss of a trophic influence which is important in the regulation of osteogenesis.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Potato research 15 (1972), S. 24-31 
    ISSN: 1871-4528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Zusammenfassung Bei vier Kartoffelsorten wurde die Leistung von ganzen Knollen mit jener von Keimlingsstücken (Pflanzen im Anzuchtgarten herangezogen aus abgelösten Keimen ohne jeden Anteil von der Mutterknolle bzw. Keimlingsstücke von den Spitzen und vom basalen Ende langer Keime) bei deren Verwendung als Pflanzmaterial miteinander verglichen. Das Ankeimen der Knollen wurde gleichzeitig begonnen, um einerseits Keime zu erhalten, die der Heranzucht von Pflanzen aus Keimlingsstücken dienten und andererseits um gekeimte Knollen für das direkte Auspflanzen zu erzeugen. Die Darstellung der Keimeigenschaften (Fig. 1) zeigt, daß es möglich war, je nach Sorte 4–9 Keime pro Mutterknolle zu erhalten. Ganze Keime ergaben den höchsten Prozentsatz an überlebenden Keimen unter den besonderen Verhältnissen im Anzuchtgarten und bildeten die kräftigsten Setzlinge (Fig. 2). Die Setzlinge wurden dann mit den gleichen Pflanzabständen wie die ganzen Knollen ins Feld verpflanzt. Man hofft, mit dieser Methode virusfreiere Pflanzen zu erhalten, weil das junge Meristem wahrscheinlich verhältnismäßig frei von Virus oder andern Krankheitserregern ist und weil die unverkennbar gesunden Keimlinge beim Versetzen ausgelesen werden können. Sowohl Knollenbildung als auch das vegetative Wachstum waren bei Stecklingen geringer als bei Pflanzen aus Knollen (Tabelle 1). Der Knollenertrag war von ganzen Knollen 2,5 mal größer als von Stecklingen von ganzen Keimen, die unter den Stecklingen den besten Ertrag brachten (Tabelle 2). Das Kraut/Knolle-Verhältnis bei Stecklingen von ganzen Keimen war kleiner als bei Pflanzen aus ganzen Knollen. Es ist deshalb sehr wahrscheinlich, daß der Ertrag verbessert werden könnte, teils durch eine frühere Anzucht von Stecklingen und teils indem mehr Pflanzen pro Hektare angepflanzt werden. Die Stecklinge bildeten einen größeren Anteil an Knollen mittlerer Größe (Tabelle 2). Die Methode scheint daher sehr wichtig zu sein, vor allem für die rasche Vermehrung eines Saatgutpostens mit gutem Gesundheitszustand. Von den vier geprüften Sorten reagierten Kufri Red und Phulwa am besten, so weit es den Knollenertrag von Stecklingen aus ganzen Keimen betrifft. (Fig. 3).
    Abstract: Résumé Les auteurs ont effectué une étude comparative, comme matériel de plantation, sur quatre variétés de Pomme de terre, de tubercules entiers et de boutures de germes (plantes produites en pépinière à partir de germes détachés sans aucune partie du tubercule-mère), provenant soit de germes entiers soit de sections du sommet ou de la base de longs germes. On a fait démarrer simultanément la germination des tubercules aussi bien pour produire des boutures de germes que des tubercules germés pour la plantation directe. Les caractéristiques de germination (fig. 1) montrent qu’il est possible d’obtenir 4–9 germes par tubercule-mère suivant la variété. Les germes entiers donnaient le porrcentage le plus élevé de survie en pépinière et produisaient les plantules de germes les plus vigoureuses (Fig. 2). Les plantules de germes étaient alors transplantées au champ aux mêmes espacements que les tubercules entiers. On peut s’attendre à ce que cette méthode donne des plantes moins virosées parce que, vraisemblablement, le jeune méristème est comparativement libre de virus et d’autres pathogènes, et aussi parce qu’une sélection des plantules apparemment saines peut être faite lors de la transplantation. A la fois, la tubérisation et le développement végétatif sont moindres dans les plantules de germes que dans les plantes issues de tubercules (Tableau 1). La production de tubercules est 2,5 fois plus forte chez les tubercules entiers que chez les plantules provenant de germes entiers, qui sont les meilleurs parmi les plantules de germes (Tableau 2). Le rapport sommet/tubercule dans les plantules de germes entiers est inférieur à celui des plantes de tubercules entiers. Il est donc tout-à-fait vraisemblable que la production pourrait être améliorée par une production précoce de plantules de germes et, partiellement, par l’augmentation du nombre de plantes à l’hectare. Les plantules de germes produisent une proportion plus grande de tubercules de forme moyenne (Tableau 2). Par conséquent, la métho-de semble avoir une grande importance, particulièrement pour une multiplication rapide de plants de haut état sanitaire. Parmi les quatre variétés testéesKufri Red etPhulwa réagissent le mieux pour ce qui concerne la production de tubercules à partir de plantules provenant de germes entiers (Fig. 3).
    Notes: Summary Experiments done to compare sproutlings and tubers as planting material in four varieties of potato demonstrate the feasibility of using sproutlings raised from whole sprouts, especially as a means of rapidly multiplying healthy seed stock. Four to nine plants per mother tuber can be raised, depending upon the variety and the type of sproutlings, and it is possible to increase further the number of plants by taking multiple cuttings from long sprouts. Among the four varieties tested Kufri Red and Phulwa responded best to the method.
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal of Morphology 133 (1971), S. 241-251 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Changes with age in bone cortex of the rat were investigated by establishing histological parameters which could be quantitated to estimate age at death. Decalcified cross sections of mandible, femur and tibia were prepared from rats two to 120 days old, and measurements were made of: (1) number of osteons, (2) average number of lamellae per osteon, (3) average Haversian canal diameter, and (4) number of non-Haversian (primary) canals. Multiple regression techniques were used to estimate age at death from several combinations of these variables.With age, the number of osteons per unit area of bone and the number of lamellae per osteon increased, but Haversian canal diameter and the number of primary canals decreased. Multiple regression analyses indicated that age at death could be estimated to ± 3 days of the true value in 95% of the cases. Nomographs based on histological measurements of each bone were prepared which can provide accurate estimates of age between two and 120 days in the Sprague-Dawley female rat. It was concluded that microstructure of bone cortex can not only be quantitated to provide accurate estimates of age but it may also constitute a sensitive measure of the metabolic state of the organism. The techniques utilized should prove useful in anthropology as well in studies of bone aging.
    Additional Material: 5 Ill.
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  • 8
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: This report adds to the available information on comparative histology of mammalian bone and introduces a semi-quantitative approach to its study. Bone samples consisted of large fragments of rib tibia and/or femur from humans, laboratory rodents and from animals that died at the Bronx Zoological Gardens. A total of 44 bone specimens representing six mammalian orders were available. Decalcified paraffin-embedded 10 μm histological cross-sections were examined at × 320. Qualitative observations were supplemented with measurements of the frequency and size distributions of Haversian and non-Haversian canals. The relative distribution of lacunae was also ascertained. The standard textbook description of mammalian bone as consisting mainly of secondary osteons was not generally seen except in Primate (especially human) bone. Rats showed a few scattered osteon-like structures, but bones of Marsupialia, Insectivora, Artiodactyla and Carnivora were entirely devoid of them. Generally, vascular bone with longitudinal canals was seen except in Lorisidae which showed a reticular type of bone. The distribution of primary longitudinal canals and the number of “filled” or “apparently empty” lacunae/unit area of bone varied both inter-species and among different areas in the same bone. Large areas of acellular and non-vascular bone were encountered in all specimens. This preliminary study revealed that species differences i bone microstructure involve the relative distribution of the same basic components which lend themselves to quantitative treatment. Comparative investigations of bone histology at many ontogenetic and phylogenetic levels should yield significant quantitative information in bone biology.
    Additional Material: 11 Ill.
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  • 9
    Publication Date: 1981-06-01
    Print ISSN: 0302-766X
    Electronic ISSN: 1432-0878
    Topics: Biology , Medicine
    Published by Springer
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  • 10
    Publication Date: 1991-11-01
    Print ISSN: 0143-1161
    Electronic ISSN: 1366-5901
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Published by Taylor & Francis
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