This article reviews various procedures used in the analysis of circadian rhythms at the
populational, organismal, cellular and molecular levels. The procedures range from visual …

A few puzzles relating to a small fraction of my endeavors in the 1950s are summarized
herein, with answers to a few questions of the Editor-in-Chief, to suggest that the rules of …

One of the key benefits in using chickens for immunization is the high yield of antibodies
obtainable. It is known that egg production decreases over time, while animal maintenance …

This article reviews the historical development and up-to-date state of thermometric
technologies for measuring human body temperature (BT) from two aspects: measurement …

" Chronoastrobiology: are we at the threshold of a new science? Is there a critical mass for
scientific research?" A simple photograph of the planet earth from outer space was one of …

During 7 consecutive days, blood and several tissues were collected during daytime
working hours only, three times per day at 4-h intervals from inbred Wistar rats, which had …

Biological rhythms exist in organisms at all levels of complexity, in most organs and at
myriad time scales. Our own biological rhythms are driven by energy emitted by the sun …

Desde hace siglos se ha observado en los seres vivos la existencia de ritmos endógenos
que preparan y adaptan la fisiología del organismo a las diferentes fases diarias y …

Timing can greatly affect the response to a stimulus, including antihypertensive medications.
Herein, we assess the response of 30 patients to losartan/hydrochlorothiazide (L/H) …

Franz Halberg revolutionalized the field of nutrition by his demonstration that “when” we eat
can make the difference between life and death in the experimental laboratory, and between …