The halogen gas inside a halogen lamp causes the evaporated tungsten to redeposit on the filament. This process, along with high pressure inside the capsule, slows down deterioration of the filament, improves lumen maintenance and extends the lampâs service life.
The mean heart rate as obtained in this study (246 beats min â1, with a range of 207â314 beats min â1) is within the range given by several authors in chicken embryos. In a previous study () we reported heart rate values ranging between 250 and 270 beats min â1 on days 19 and 20 of incubation.
A healthy fetal heartbeat is usually between 120 and 160 beats per minute, and sounds like a horse galloping. An abnormal heart rate may be the sign of a compressed umbilical cord, infection, anemia, cardiac malformations, or that the baby is not receiving enough oxygen. healthy fetal heartbeat is usually between 120 and 160 beats per minute, and sounds like a horse galloping. An abnormal heart rate may be the sign of a compressed umbilical cord, infection, anemia, cardiac malformations, or that the baby is not receiving enough oxygen.