Stimulation of the development of the avian embryo by x‐rays

Bless, A. A.; Romanoff, Alexis L.

doi:10.1002/jcp.1030210204

Cited by 10 publications

(1 citation statement)

References 7 publications

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“…Small doses (<0.8 Gy) accelerated the embryonic development process and doses above 0.8 Gy retarded the developmental process. Bless and Romanoff (1943) found that a moderate dose has a stimulating effect on the early embryonic development (earlier hatch). The uniformity in the development of the exposed embryos however was less than that in the unexposed embryos.…”

Section: Introductionmentioning

confidence: 97%

Body weight and enzymes activities in blood plasma of chickens hatched from eggs irradiated with low level gamma rays before incubation

Kraljević¹,

Vilić²,

Miljanić³

et al. 2009

Acta vet. (Beogr.)

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An attempt was made to determine the effect of eggs irradiation by low dose gamma radiation upon body weight (BW), body weight gain (BWG), feed consumption (FC) and feed conversion ratio (FCR) of chickens hatched from irradiated eggs. Our aim was also to investigate the activity of aspartate aminotransferase (AST), alanine aminotransferase (ALT), acid phosphatase (ACP) and alkaline phosphatase (ALP) in the blood plasma of those chickens. The eggs of heavy breed chickens were irradiated with a dose of 0.15 Gy gamma radiation (60Co) before incubation. Along with the chickens which were hatched from irradiated eggs, there was a control group of chickens hatched from nonirradiated eggs. All other conditions were the same for both groups of chickens. BW of chickens was measured by a single weighting of chickens on the 1st and 42nd day of the fattening period. An average BWG was calculated from the obtained results during the whole fattening period (i.e. from the 1st until the 42nd day). FC was measured each day during the fattening time and total feed consumption was calculated. On the basis of FC and BW, FCR was calculated (FC/BWG). Blood samples were taken from the right jugular vein on the 1st and 3rd day, or from the wing vein on days 5, 7, 10, 20, 30 and 42. The activity of all enzymes was determined spectrophotometrically by using reagents according to recommendations of the International Federation of Clinical Chemistry and Laboratory Medicine. BW of chickens hatched from irradiated eggs was statistically significant higher than in the controls during the fattening period; on day 42 of fattening, BW of the experimental chickens was 90 g (i.e. 4.8 %) higher than in the controls (P<0.05). FC during the fattening period did not essentially differ in the experimental and the control group. The AST activity was significantly increased in blood plasma of chickens hatched from irradiated eggs on days 3 and 10 (P<0.05), ALT activity was increased in the same chickens only on the 10th day (P<0.05). The activity of ACP in the blood plasma of the same chickens was increased on day 42 (P<0.001) and the activity of ALP in the blood plasma of chickens hatched from irradiated eggs was decreased on day 42 (P<0.001). The obtained results indicate that low doses of gamma radiation have a stimulative effect upon metabolic processes in chickens hatched from eggs irradiated before incubation, which is proved by increase of BWG and BW, as well as by increase of AST, ALT and ACP activities in blood plasma

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Section: Introductionmentioning

confidence: 97%

Body weight and enzymes activities in blood plasma of chickens hatched from eggs irradiated with low level gamma rays before incubation

Kraljević¹,

Vilić²,

Miljanić³

et al. 2009

Acta vet. (Beogr.)

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Cultivation of the early chick embryo in vitro

Romanoff

1943

Anat. Rec.

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Dissociability of developmental processes in the morphogenesis of the ear in Ambystoma, as revealed by X‐ray damage

Piatt

1968

Anat. Rec.

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Eggs of Ambystoma maculatum from the same clutch were separated at Harrison's stage eight into three groups and maintained at So, 14" and 2OoC, respectively, until stage 28. At these three temperatures the respective number of hours between stages eight and 28 were 291, 171, 99. Half of each group was then x-irradiated with 600 r and the right ear vesicle substituted for that of the non-irradiated complement. Subsequent development of the irradiated grafts, a l l reared at 20"C, was compared among the groups. Within the range of temperatures employed, hypothermia alone has no effect upon final ear development; every left ear in all groups developed normally. Developmentl of irradiated grafts in the 8" group is decidedly more abnormal than in either 1 4 ' or The data demonstrate that the chronologically older ear is more radiosensitive t h a n the younger, despite morphological panty among groups at time of irradiation. This suggests that prolonged hypothermia may dissociate in time the invisible or biochemical processes of development from the purely morphological; the pace of the former is less retarded than the latter.

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Stimulation of the development of the avian embryo by x‐rays

Cited by 10 publications

References 7 publications

Body weight and enzymes activities in blood plasma of chickens hatched from eggs irradiated with low level gamma rays before incubation

Body weight and enzymes activities in blood plasma of chickens hatched from eggs irradiated with low level gamma rays before incubation

Cultivation of the early chick embryo in vitro

Dissociability of developmental processes in the morphogenesis of the ear in Ambystoma, as revealed by X‐ray damage

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