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核心技术专利：CN118964589B侵权必究

核心技术专利：CN118964589B侵权必究

Bargoni N, Tazartes O

Dipartimento di Medicina e Oncologia Sperimentale, Universitá di Torino, Italy.

Int J Biochem. 1988;20(3):317-9. doi: 10.1016/0020-711x(88)90357-6.

In chicken embryo cartilage putrescine levels, maximal at day 8, fall by day 16 to a four-fold lower value, which remains unchanged through hatching and in the 12-day-old chick. 2. Spermine and spermidine, initially higher than putrescine, are almost halved between days 8 and 11, and remain constant afterwards. 3. Ornithine decarboxylase is down to 20% of the day 8 value by day 16, and is further reduced in the newly hatched chick. 4. S-Adenosyl-methionine decarboxylase activity shows a 50% reduction between days 8 and 11, and no further changes. 5. Spermidine acetyltransferase activity at day 11 is 30% lower than at day 8, goes back up to the initial level by day 16, and progressively decreases through hatching and the first 12 days of life.

在鸡胚软骨中，腐胺水平在第8天达到最高，到第16天降至其四分之一，直至孵化和12日龄雏鸡阶段均保持不变。2. 精胺和亚精胺最初高于腐胺，在第8天至第11天之间几乎减半，此后保持恒定。3. 鸟氨酸脱羧酶到第16天降至第8天值的20%，在新孵化的雏鸡中进一步降低。4. S-腺苷甲硫氨酸脱羧酶活性在第8天至第11天之间降低了50%，之后没有进一步变化。5. 亚精胺乙酰转移酶活性在第11天比第8天低30%，到第16天回升至初始水平，并在孵化和出生后的前12天逐渐下降。

Bargoni N, Tazartes O

Dipartimento di Medicina e Oncologia Sperimentale, Universitá di Torino, Italy.

Int J Biochem. 1988;20(3):317-9. doi: 10.1016/0020-711x(88)90357-6.

In chicken embryo cartilage putrescine levels, maximal at day 8, fall by day 16 to a four-fold lower value, which remains unchanged through hatching and in the 12-day-old chick. 2. Spermine and spermidine, initially higher than putrescine, are almost halved between days 8 and 11, and remain constant afterwards. 3. Ornithine decarboxylase is down to 20% of the day 8 value by day 16, and is further reduced in the newly hatched chick. 4. S-Adenosyl-methionine decarboxylase activity shows a 50% reduction between days 8 and 11, and no further changes. 5. Spermidine acetyltransferase activity at day 11 is 30% lower than at day 8, goes back up to the initial level by day 16, and progressively decreases through hatching and the first 12 days of life.

在鸡胚软骨中，腐胺水平在第8天达到最高，到第16天降至其四分之一，直至孵化和12日龄雏鸡阶段均保持不变。2. 精胺和亚精胺最初高于腐胺，在第8天至第11天之间几乎减半，此后保持恒定。3. 鸟氨酸脱羧酶到第16天降至第8天值的20%，在新孵化的雏鸡中进一步降低。4. S-腺苷甲硫氨酸脱羧酶活性在第8天至第11天之间降低了50%，之后没有进一步变化。5. 亚精胺乙酰转移酶活性在第11天比第8天低30%，到第16天回升至初始水平，并在孵化和出生后的前12天逐渐下降。