The extirpation of the hypophysjs in the adult frog has not given uniform results. Caselli ('00) and Gaglio ('02) who reported no changes following hypophysectomies were followed by Boteano ('06) who reported a neuromuscular asthenia in the operated animals. Houssay ('10) came to the conclusion that
Effects of early removal of the heart and arrest of the circulation on the development of frog embryos
β Scribed by Knower, H. McE.
- Publisher
- John Wiley and Sons
- Year
- 1907
- Tongue
- English
- Weight
- 270 KB
- Volume
- 1
- Category
- Article
- ISSN
- 0003-276X
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One hundred and two isolated frog hearts were divided into ten groups and placed individually in a waveguide filled with Ringer's solution and exposed to 2,450-MHz CW radiation at 2 and 8.55 W/kg. Heart rate was recorded using one of the following methods: 3-M KCI glass electrode, ultrasound probe,
Several investigators have reported robust, statistically significant results that indicate that weak (approximately 1 microT) magnetic fields (MFs) increase the rate of morphological abnormalities in chick embryos. However, other investigators have reported that weak MFs do not appear to affect emb