Geodesic
Ricerche sulle sintesi che avvengono durante le metamorfosi del Bombyx mori
Atti della Accademia nazionale dei Lincei. Rendiconti della Classe di scienze fisiche, matematiche e naturali, Série 8, Tome 50 (1971) no. 3, pp. 370-376 Cet article a éte moissonné depuis la source Biblioteca Digitale Italiana di Matematica

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We have carried out b y the salting-out method, a study on the differences of the protein fractions during the larval and pupal stage of Bombyx mori. We tried to find a relationship between these data and the differences in the ribosomes as studied with the analytical ultracentrifuge and sucrose gradients. The salting-out diagrams of the unfertilized egg and the embryo, show only one peak at 65% ammonium sulphate saturation; when hatched and during the larval stages, the diagrams show 2 peaks at 50 and 75% of saturation (fig. 1). After spinning the cocoon a third peak at 65% of saturation appears, which remains during the entire pupal stage. In the female pupa of 336 hours, a peak appears at 30% of saturation; this peak, which is present also in the female moth (fig. 2), seems to be related to the growth of the eggs, since it is lacking in the male (fig. 3). With the analytical ultracentrifuge (fig. 5), one observes in the last stage of the larva a polysome peak which rapidly decreases until it disappears after metamorphosis. The ribosomes decrease quantitatively in the young pupa and increase again towards the end of the pupal stage, becoming more pronounced in the female moth. Beginning with the second larval stage the presence of a 16 S fraction can be noted in both sexes. This fraction is always abundant in the female but it decreases considerably in the male before the adult emerges. The fact, that the ribosomes and polysomes are present in relatively high concentration shortly before the appearance of the 65 % peak, suggests that the ribosomes are active in the synthesis of this fraction. 
@article{RLINA_1971_8_50_3_a12,
     author = {Leonardi Cigada, Marisa and Laria De Bernardi, Fiorenza},
     title = {Ricerche sulle sintesi che avvengono durante le metamorfosi del {Bombyx} mori},
     journal = {Atti della Accademia nazionale dei Lincei. Rendiconti della Classe di scienze fisiche, matematiche e naturali},
     pages = {370--376},
     year = {1971},
     volume = {Ser. 8, 50},
     number = {3},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/RLINA_1971_8_50_3_a12/}
}
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Leonardi Cigada, Marisa; Laria De Bernardi, Fiorenza. Ricerche sulle sintesi che avvengono durante le metamorfosi del Bombyx mori. Atti della Accademia nazionale dei Lincei. Rendiconti della Classe di scienze fisiche, matematiche e naturali, Série 8, Tome 50 (1971) no. 3, pp. 370-376. http://geodesic.mathdoc.fr/item/RLINA_1971_8_50_3_a12/

Barth R. H., Bunyard P. P. e Hamilton T. H. (1964) - RNA metabolism in pupae of the oak Silkworm Antheraea pernyi: the effect of diapause, development and injury, «Proc. Nat. Ac. Sc.», 52, 1572.

Berry S. J., Krishnakumaran A., Oberländer H. e Schneiderman H. A. (1967) - Effect of hormones and injury on RNA synthesis in Saturniid moths, «J. Insect Physiol.», 13, 1511.

Brown D. D. e Caston J. D. (1962) - Biochemistry of Amphibian development, «Dev. Biol.», 5, 412.

Cigada Leonardi M. (1956) - Le proteine di struttura nello sviluppo del Bombyx mori, «Ist. Lombardo (Rend. Sc.)», 90, 573.

Gadallah A. L., Kilgore W. W. e Painter R. R. (1970) - Isolation and identification of egg ribosomes of the housefly Musca domestica, «J. Insect Physiol.», 16, 1245.

Laufer H. (1960) - Blood proteins in Insect development, «Ann. N. Y. Acad. Sc.», 89, 490.

Niemierko S., Wlodawer P. e Wojtczak A. (1956) - Lipid and Phosphorus metabolism during growth of silkworm Bombyx mori, «Acta Biol, exper.», 17, 255.

Price G. M. (1965) - Nucleic acids in the larva of the blowfly Calliphora erithrocephala, «J. Insect Physiol.», 11, 869.

Ranzi S., Protei Necchi M. e Citterio P. (1965) - Impiego dei diagrammi di salting-out per lo studio della sistematica zoologica, «Rend. Acc. Naz. Lincei (Sc. fis.) [8]», 38, 791.

Russo Caia S. (1960) - Aspetti biochimici della metamorfosi degli Insetti. L'acido ribonucleico durante lo sviluppo larvale e la metamorfosi di Musca domestica L., «Rend. Acc. Naz. Lincei (Sc. fis.) [8]», 29, 215.

Shigematsu H. (1958) - Synthesis of blood proteins by the fat body in Silkworm Bombyx mori, «Nature», 182, 880.

Telfer W. H. e Williams C. M. (1953) - Immunological studies of Insect metamorphosis. I - Qualitative and quantitative description of the blood antigens of the cecropia Silkworm, «J. Gen. Physiol.», 36, 389.

Telfer W. H. (1954) - Immunological studies of Insect metamorphosis. II - The role of sex-limited Blood Protein in egg formation by the cecropia Silkworm, «J. Gen. Physiol.», 37, 539.

Wyatt G. R., Longheed T. e Wyatt S. S. (1956) - The chemistry of Insect Hemolimph. Organic components of the Hemolimph of silkworm Bombyx mori and two other species, «J. Gen. Physiol.», 39, 853.