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1984 (1)
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1Author    Hans-Georg Lang, Eberhard HornRequires cookie*
 Title    The Development of the Static Vestibulo-Ocular Reflex in Xenopus  
 Abstract    The relation between the am ount of the static vestibulo-ocular reflex arc and the developm ental stage is character­ ized by an optim um function. The reflexes occur before the labyrinth is completely developed, but at this time, bilat­ eral connections of the labyrinth with the oculom otor cen­ ters are efficient. 
  Reference    Z. Naturforsch. 35c, 1122—1123 (1980); received August 18 1980 
  Published    1980 
  Keywords    Vestibulo-Ocular Reflex Arc, Development, Xenopus 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-1122_n.pdf 
 Identifier    ZNC-1980-35c-1122_n 
 Volume    35 
2Author    Hans-Gunter WuttkeRequires cookie*
 Title    Chromoplasts in Rosa rugosa: Development and Chemical Characterization of Tubular Elements  
 Abstract    1. Development and fine structure of the chromoplasts in hips of Rosa rugosa have been in­ vestigated by electron and polarizing microscopy. 2. The chromoplasts develop from chloroplasts. During disorganization of the thylakoid system characteristic strutures become visible: 'oblique' grana, U-shaped thylakoids, and occassionally 'thylakoid teeth' as well as thylakoid anastomoses. — In this early stage, tubules appear in the plastid matrix. They are sometimes connected with membranes, especially with thylakoids. 3. In ripe hips the chromoplasts are packed with tubules. These chromoplast tubules, which attain lengths of up to at least 1.5 /um, are non-ramified and lie parallel to each other. Their diameter is variable, with a mean of 18 nm. They are polygonal in cross-section with electron-dense walls and electron-transparent cores. Association of ellipsoidal osmiophilic globules with the tubules can often be seen. Irregularly swollen remnants of former thylakoids are found in connection with these tubules. In spindle-shaped chromoplasts, the tubules are oriented parallel to the longitudinal axis. Positive birefringence and positive dichroism are observed. 4. The chemical composition of tubule fractions has been analyzed. The tubules contain ap­ preciable amounts of carotenoids, phospho-and glycolipids, and proteins. 5. The origin and development of the tubules is discussed. It appears likely that reorganization of part of the thylakoid system and synthesis of carotenoids are involved in the formation of tubules. 6. The plastids in the yellow autumn leaves of R osa rugosa contain globules but not tubules. 
  Reference    (Z. Naturforsch. 31c, 456 [1976]; received March 25 1976) 
  Published    1976 
  Keywords    R osa, Chromoplast, Ultrastructure, Development, Chemical Composition 
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 TEI-XML for    default:Reihe_C/31/ZNC-1976-31c-0456.pdf 
 Identifier    ZNC-1976-31c-0456 
 Volume    31 
3Author    M. Heisenberg, K. BöhlRequires cookie*
 Title    Isolation of Anatomical Brain Mutants of Drosophila by Histological Means  
 Abstract    Due to its small size D rosophila m elanogaster can conveniently be used in screening experiments for anatomical brain mutants. A simple method has been designed which allows to process up to 20 identifiable flies as a single preparation in a standard histology routine. Anatomical brain mutants are very frequent. Over 60 mutants were obtained from the inspection of about 3000 brains. So far genetic variations of brain structure fall into 4 classes: (1) "low fidelity" mutants in which brains are less precisely built; (2) "brain shape" mutants with globally or partially reduced brains; (3) "architectonic" mutants which show constructional defects mainly in the repetitive structures of the brain and (4) "vacuolar" mutants with globular "holes" in certain areas of the brain. These mutant classes obviously reflect different aspects of brain development like cell pro­ liferation (2), "wiring" (3) and cell death (4). Some of the mutants may prove to be useful in anatomical, physiological or genetic brain research. 
  Reference    Z. Naturforsch. 34c, 143 (1979); received November 18 1978 
  Published    1979 
  Keywords    Brain, Anatomy, Development, Mutants, D rosophila 
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 TEI-XML for    default:Reihe_C/34/ZNC-1979-34c-0143.pdf 
 Identifier    ZNC-1979-34c-0143 
 Volume    34 
4Author    H. Artm, Ut KayserRequires cookie*
 Title    De novo Synthesis and Levels of Cytochrome c and a Biliprotein during Pupal-Adult Development of a Butterfly, Pieris brassicae  
 Abstract    Using a sensitive pH-difference spectroscopic method in combination with a three-column procedure of ion-exchange chromatography (overall yield 94%) the levels o f cytochrome c in the large white butterfly, Pieris brassicae, were determined from the last larval instar to the adult 
  Reference    Z. Naturforsch. 39c, 938—947 (1984); received May 21/July 25 1984 
  Published    1984 
  Keywords    Cytochrome c, Biliprotein, Biosynthesis, Development, Insects 
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 TEI-XML for    default:Reihe_C/39/ZNC-1984-39c-0938.pdf 
 Identifier    ZNC-1984-39c-0938 
 Volume    39