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  • 1
    Electronic Resource
    Electronic Resource
    Developmental Genetics of Drosophila Imaginal Discs (1973)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Genetics 7 (1973), S. 381-433 
    Details
    ISSN: 0066-4197
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ge.07.120173.002121
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  • 2
    Electronic Resource
    Electronic Resource
    Nuclear Transplantation in Drosophila melanogaster (1971)
    [s.l.] : Nature Publishing Group
    Nature 230 (1971), S. 185-186 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Several mutants of Drosophila were used as donors of the preblastoderm nuclei. These include yellow (y; 1-0.0, pale bristles and cuticle); yellow, white (eyes) singed (gnarled bristles) (H〉 1-1.5; sn3; 1-21.0); and ebony (dark cuticle) multiple wing hairs (two to seven rather than one trichome ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/230185a0
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Esterase Changes during the Activation of Pupal Brains of the Saturniid Moth, Hyalophora cecropia (1966)
    [s.l.] : Nature Publishing Group
    Nature 212 (1966), S. 432-433 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Brains were extirpated from unchilled diapausing pupae, previously chilled pupae, developing adults and adults of HyaLophora cecropia. The brains, each of which weighed about 2 mg wet weight, were*frozen at - 10 C on 1 cm squares of Whatman No. 1 filter paper. The brains were thawed and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/212432a0
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  • 4
    Electronic Resource
    Electronic Resource
    Chemical Control of Moulting in Arthropods (1968)
    [s.l.] : Nature Publishing Group
    Nature 220 (1968), S. 601-603 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We have shown that the ecdysones control moulting in three diverse classes of arthropods besides insects. As experimental animals, we selected representatives of the principal arthropod classes. Limulus polyphemus, the horseshoe crab, was chosen because it is one of the few survivors of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/220601a0
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  • 5
    Electronic Resource
    Electronic Resource
    Albumin Syracuse: a Variant demonstrated at Acid p H (1968)
    [s.l.] : Nature Publishing Group
    Nature 218 (1968), S. 1159-1160 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] One thousand sera were chosen at random from specimens submitted to the clinical pathology service of Upstate Medical Center. Cellulose acetate electrophoresis (Beckman microzone system) was performed at 230 Vfor 45 miii iri 0-054 M ^ris-citrate buffer, pK 5-4. All sera were diluted 1 : 4 with ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2181159a0
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  • 6
    Electronic Resource
    Electronic Resource
    Rates of DNA and RNA Synthesis in Various Tissues during a Larval Moult Cycle of Samia cynthia ricini (Lepidoptera) (1965)
    [s.l.] : Nature Publishing Group
    Nature 205 (1965), S. 1131-1133 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Samia cynthia ricini, a non-diapausing saturniid moth, was used. This strain has been maintained in our laboratory for 12 generations, is inbred and uniform in its rate of development. All experiments were conducted at 25 ± 1 C. Tritiated thymidine (10 mc./g) or uridine (10 mc./g) was ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2051131a0
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  • 7
    Electronic Resource
    Electronic Resource
    Co-ordinated Neuromuscular Activity in Insect Spiracles at Sub-zero Temperatures (1968)
    [s.l.] : Nature Publishing Group
    Nature 217 (1968), S. 95-96 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The opening of each spiracle is regulated by a spiracular valve, moved by a single closer muscle which is opposed by an "elastic" ligament. The muscle is innervated by a nerve from the central nervous system1. Gas exchange across the spiracles has been shown to be discontinuous from + 25 to 0 C. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/217095a0
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  • 8
    Electronic Resource
    Electronic Resource
    A temperature sensitive mutation that reduces mitotic rate inDrosophila melanogaster (1976)
    Springer
    Development genes and evolution 179 (1976), S. 215-236 
    Details
    ISSN: 1432-041X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A temperature-sensitive cell autonomous mutation ofDrosophila, l(1)ts-1126 (1–16±2), that affects the rate of cell division is described. When mutant animals are exposed to the restrictive temperature of 29°C during the first and second larval stages, the growth rate of the larvae is retarded. A delay in pupariation occurs during which larvae reach their full size, and the resulting flies are normal. When mutant animals are exposed to restrictive temperature during the third larval stage, growth is also retarded but no delay in pupariation occurs, and the resulting flies are reduced in size. Their small size is due in part to a decreased number of cells and in part to a smaller size of the cells. X-ray induced, marked, homozygousl(1)ts-1126 clones in an otherwise normal animal, are smaller in animals exposed to pulses of restrictive temperature when compared to clones in animals kept at permissive temperature of 22°C. Clone size decreases as pulse length increases. Clones on the wing blade induced 24 h after oviposition are smaller than clones induced at 48 h in animals grown at restrictive temperature. This result is interpreted as an inability of the slower dividingl(1)ts-1126 cells to survive when in competition with wildtype cells. The distribution of survivingl(1)ts-1126 clones in gynandromorphs grown at restrictive temperature supports this conclusion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00848647
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  • 9
    Electronic Resource
    Electronic Resource
    Vision-based robotic convoy driving (1995)
    Springer
    Machine vision and applications 8 (1995), S. 359-364 
    Details
    ISSN: 1432-1769
    Keywords: Key words:Convoy driving - Caravan driving - Autonomous navigation - Mobile robots - Visual tracking
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract. This article describes a method for vision-based autonomous convoy driving in which a robotic vehicle autonomously pursues another vehicle. Pursuit is achieved by visually tracking a target mounted on the back of the pursued vehicle. Visual tracking must be robust, since a failure leads to catastrophic results. To make our system as reliable as possible, uncertainty is accounted for in each measurement and propagated through all computations. We use a best linear unbiased estimate (BLUE) of the target's position in each separate image, and a polynomial least-mean-square fit (LMSF) to estimate the target's motion. Robust autonomous convoy driving has been demonstrated in the presence of various lighting conditions, shadowing, other vehicles, turns at intersections, curves, and hills. A continuous, autonomous, convoy drive of over 33 km (20 miles) was successful, at speeds averaging between 50 and 75 km/h (30-45 miles/h).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01213497
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  • 10
    Electronic Resource
    Electronic Resource
    Vision-based robotic convoy driving (1995)
    Springer
    Machine vision and applications 8 (1995), S. 359-364 
    Details
    ISSN: 1432-1769
    Keywords: Convoy driving ; Caravan driving ; Autonomous navigation ; Mobile robots ; Visual tracking
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract This article describes a method for vision-based autonomous convoy driving in which a robotic vehicle autonomously pursues another vehicle. Pursuit is achieved by visually tracking a target mounted on the back of the pursued vehicle. Visual tracking must be robust, since a failure leads to catastrophic results. To make our system as reliable as possible, uncertainty is accounted for in each measurement and propagated through all computations. We use a best linear unbiased estimate (BLUE) of the target's position in each separate image, and a polynomial least-mean-square fit (LMSF) to estimate the target's motion. Robust autonomous convoy driving has been demonstrated in the presence of various lighting conditions, shadowing, other vehicles, turns at intersections, curves, and hills. A continuous, autonomous, convoy drive of over 33 km (20 miles) was successful, at speeds averaging between 50 and 75km/h (30–45 miles/h).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01213497
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    Paper (German National Licenses)
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