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.
Depending on its age and what its doing, the average cat's heart beats 120 to nearly 200 beats per minute. As the cat's heart weakens and the animal is closer to dying, the heart rate drops dramatically to just a fraction of its normal rate.Near the end, there are longer and longer pauses between each individual beat, and the pattern becomes very irregular until the heart completely stops.epending on its age and what its doing, the average cat's heart beats 120 to nearly 200 beats per minute. As the cat's heart weakens and the animal is closer to dying, the heart rate drops dramatically to just a fraction of its normal rate.