Clock Tutorials:
This April 09, 2006 post places another paper of ours (Reference #17) within a broader context of physiology, behavior, ecology and evolution. The paper was a result of a "communal" experiment in the lab, i.e., it was not included in...
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Posted on May 3, 2008 7:56 AM • 0 Comments • 0 TrackBacks
Hypotheses leading to more hypotheses (from March 19, 2006 - the Malaria Day):...
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Posted on May 2, 2008 7:53 AM • 6 Comments • 0 TrackBacks
You probably realize by now that my expertise is in clocks and calendars of birds, but blogging audience forces me to occasionally look into human clocks from a medical perspective. Reprinted below the fold are three old Circadiana posts about...
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Posted on May 1, 2008 7:57 AM • 1 Comments • 0 TrackBacks
Microarrays have been used in the study of circadian expression of mammalian genes since 2002 and the consensus was built from those studies that approximately 15% of all the genes expressed in a cell are expressed in a circadian manner....
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Posted on April 30, 2008 7:56 AM • 4 Comments • 0 TrackBacks
This is going to be a challenging post to write for several reasons. How do I explain that a paper that does not show too much new stuff is actually a seminal paper? How do I condense a 12-page Cell...
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Posted on April 29, 2008 7:54 AM • 0 Comments • 0 TrackBacks
Chad wrote a neat history of (or should we say 'evolution of') clocks, as in "timekeeping instruments". He points out the biological clocks are "...sort of messy application, from the standpoint of physics..." and he is right - for...
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Posted on April 28, 2008 7:52 AM • 0 Comments • 0 TrackBacks
Considering I've been writing textbook-like tutorials on chronobiology for quite a while now, trying always to write as simply and clearly as possible, and even wrote a Basic Concepts And Terms post, I am surprised that I never actually defined...
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Posted on April 27, 2008 7:51 AM • 6 Comments • 0 TrackBacks
This is an appropriate time of year for this post (February 05, 2006)......
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Posted on April 26, 2008 7:57 AM • 1 Comments • 0 TrackBacks
This post (written on August 13, 2005) describes the basic theory behind photoperiodism and some experimental protocols developed to test the theory....
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Posted on April 25, 2008 7:54 AM • 0 Comments • 0 TrackBacks
This post (click on the icon) was originally written on May 07, 2005, introducing the topic of neuroendocrine control of seasonal changes in physiology and behavior....
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Posted on April 24, 2008 7:51 AM • 0 Comments • 0 TrackBacks
This is the sixth post in a series about mechanism of entrainment, running all day today on this blog. In order to understand the content of this post, you need to read the previous five installments. The original of this...
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Posted on April 23, 2008 8:00 AM • 0 Comments • 0 TrackBacks
This is the fifth post in a series about mechanism of entrainment. Originally written on April 11, 2005....
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Posted on April 22, 2008 7:58 AM • 0 Comments • 0 TrackBacks
The fourth post in the series on entrainment, originally written on April 10, 2005, explains the step-by-step method of constructing a PRC....
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Posted on April 21, 2008 7:56 AM • 0 Comments • 0 TrackBacks
The third post in the series on entrainment, first written on April 10, 2005, starts slowly to get into the meat of things...As always, clicking on the spider-clock icon will take you to the site of the original post....
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Posted on April 20, 2008 7:54 AM • 0 Comments • 0 TrackBacks
This is the second in a series of posts on the analysis of entrainment, originally written on April 10, 2005....
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Posted on April 19, 2008 7:59 AM • 0 Comments • 0 TrackBacks
Going into more and more detail, here is a February 11, 2005 post about the current knowledge about the circadian organization in my favourite animal - the Japanese quail....
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Posted on April 18, 2008 7:57 AM • 0 Comments • 0 TrackBacks
This post was originally written on February 11, 2005. Moving from relatively simple mammalian model to more complex systems....
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Posted on April 17, 2008 7:56 AM • 0 Comments • 0 TrackBacks
This February 06, 2005 post describes the basic elements of the circadian system in mammals....
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Posted on April 16, 2008 7:54 AM • 1 Comments • 0 TrackBacks
This post from February 03, 2005 covers the basic concepts and terms on entrainment. This is also the only blog post to date that I am aware of that was cited in a scientific paper....
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Posted on April 15, 2008 8:01 AM • 0 Comments • 0 TrackBacks
I wrote this post back on February 02, 2005 in order to drive home the point that the circadian clock is not a single organ, but an organ system comprised of all cells in the body linked in a...
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Posted on April 14, 2008 8:09 AM • 0 Comments • 0 TrackBacks
I wrote this post back on January 23, 2005. It explains how clock biologists think and how they design their experiments:...
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Posted on April 13, 2008 8:07 AM • 0 Comments • 0 TrackBacks
This post is a modification from two papers written for two different classes in History of Science, back in 1995 and 1998. It is a part of a four-post series on Darwin and clocks. I first posted it here...
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Posted on April 12, 2008 8:05 AM • 0 Comments • 0 TrackBacks
This post about the origin, evolution and adaptive fucntion of biological clocks originated as a paper for a class, in 1999 I believe. I reprinted it here in December 2004, as a third part of a four-part post. Later, I...
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Posted on April 11, 2008 8:00 AM • 0 Comments • 0 TrackBacks
This post, originally published on January 16, 2005, was modified from one of my written prelims questions from early 2000....
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Posted on April 10, 2008 8:08 AM • 0 Comments • 0 TrackBacks
This is the third in the series of posts designed to provide the basics of the field of Chronobiology. This post is interesting due to its analysis of history and sociology of the discipline, as well as a look...
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Posted on April 9, 2008 8:06 AM • 0 Comments • 0 TrackBacks
This is the second in the series of posts designed to provide the basics of the field of Chronobiology. See the first part: ClockTutorial #1 - What Is Chronobiology and check out the rest of them here - they...
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Posted on April 8, 2008 8:03 AM • 0 Comments • 0 TrackBacks
This is the first in a series of posts from Circadiana designed as ClockTutorials, covering the basics of the field of Chronobiology. It was first written on January 12, 2005:...
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Posted on April 7, 2008 8:18 AM • 0 Comments • 0 TrackBacks
NBM found an excellent online article (which I have seen before but I forgot) depicting Phase-Response Curves (PRC) to injections of melatonin in humans, rodents and lizards. Note how the shape is roughly opposite to that of a PRC to...
Posted on August 12, 2007 10:34 PM • 1 Comments • 0 TrackBacks
Going into more and more detail, here is a February 11, 2005 post about the current knowledge about the circadian organization in my favourite animal - the Japanese quail....
Read on »
Posted on July 31, 2007 8:57 AM • 0 Comments • 0 TrackBacks
This post was originally written on February 11, 2005. Moving from relatively simple mammalian model to more complex systems....
Read on »
Posted on July 30, 2007 8:58 AM • 0 Comments • 0 TrackBacks
This February 06, 2005 post describes the basic elements of the circadian system in mammals....
Read on »
Posted on July 27, 2007 9:02 AM • 0 Comments • 0 TrackBacks
I wrote this post back on February 02, 2005 in order to drive home the point that the circadian clock is not a single organ, but an organ system comprised of all cells in the body linked in a...
Read on »
Posted on July 26, 2007 8:59 AM • 1 Comments • 0 TrackBacks
This post (written on August 13, 2005) describes the basic theory behind photoperiodism and some experimental protocols developed to test the theory....
Read on »
Posted on July 25, 2007 8:55 AM • 0 Comments • 0 TrackBacks
This post (click on the icon) was originally written on May 07, 2005, introducing the topic of neuroendocrine control of seasonal changes in physiology and behavior....
Read on »
Posted on July 24, 2007 8:52 AM • 0 Comments • 0 TrackBacks
This is the sixth post in a series about mechanism of entrainment, running all day today on this blog. In order to understand the content of this post, you need to read the previous five installments. The original of this...
Read on »
Posted on July 23, 2007 8:52 AM • 0 Comments • 0 TrackBacks
This is the fifth post in a series about mechanism of entrainment. Originally written on April 11, 2005....
Read on »
Posted on July 20, 2007 8:58 AM • 0 Comments • 0 TrackBacks
The fourth post in the series on entrainment, originally written on April 10, 2005, explains the step-by-step method of constructing a PRC....
Read on »
Posted on July 19, 2007 8:54 AM • 0 Comments • 0 TrackBacks
The third post in the series on entrainment, first written on April 10, 2005, starts slowly to get into the meat of things...As always, clicking on the spider-clock icon will take you to the site of the original post....
Read on »
Posted on July 18, 2007 8:59 AM • 0 Comments • 0 TrackBacks
This is the second in a series of posts on the analysis of entrainment, originally written on April 10, 2005....
Read on »
Posted on July 17, 2007 8:53 AM • 0 Comments • 0 TrackBacks
This post from February 03, 2005 covers the basic concepts and terms on entrainment. This is also the only blog post to date that I am aware of that was cited in a scientific paper....
Read on »
Posted on July 16, 2007 8:57 AM • 0 Comments • 0 TrackBacks
I wrote this post back on January 23, 2005. It explains how clock biologists think and how they design their experiments:...
Read on »
Posted on July 12, 2007 8:56 AM • 0 Comments • 0 TrackBacks
This is the third in the series of posts designed to provide the basics of the field of Chronobiology. This post is interesting due to its analysis of history and sociology of the discipline, as well as a look...
Read on »
Posted on July 11, 2007 9:09 AM • 0 Comments • 0 TrackBacks
This is the second in the series of posts designed to provide the basics of the field of Chronobiology. See the first part: ClockTutorial #1 - What Is Chronobiology and check out the rest of them here - they...
Read on »
Posted on July 10, 2007 8:56 AM • 0 Comments • 0 TrackBacks
Considering I've been writing textbook-like tutorials on chronobiology for quite a while now, trying always to write as simply and clearly as possible, and even wrote a Basic Concepts And Terms post, I am surprised that I never actually defined...
Read on »
Posted on July 9, 2007 4:52 PM • 4 Comments • 0 TrackBacks
This is the first in a series of posts from Circadiana designed as ClockTutorials, covering the basics of the field of Chronobiology. It was first written on January 12, 2005:...
Read on »
Posted on July 9, 2007 8:56 AM • 0 Comments • 0 TrackBacks
Placing Darwin into the chronology of the history of Chronobiology.
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Posted on February 12, 2007 10:53 AM • 0 Comments • 0 TrackBacks
Considering I've been writing textbook-like tutorials on chronobiology for quite a while now, trying always to write as simply and clearly as possible, and even wrote a Basic Concepts And Terms post, I am surprised that I never actually defined...
Read on »
Posted on January 28, 2007 3:46 AM • 6 Comments • 0 TrackBacks
An article I really liked...
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Posted on October 4, 2006 11:58 AM • 5 Comments • 0 TrackBacks
This post describes the basic theory behind photoperiodism and some experimental protocols developed to test the theory.
Read on »
Posted on August 17, 2006 10:59 AM • 2 Comments • 0 TrackBacks
This post is introducing the topic of neuroendocrine control of seasonal changes in physiology and behavior.
Read on »
Posted on August 17, 2006 9:59 AM • 0 Comments • 0 TrackBacks
This post gives you links to further online resources and literature on entrainment and Phase-Response Curves, as well as a link to a database of PRCs so you can play with them yourself.
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Posted on August 16, 2006 2:59 PM • 0 Comments • 0 TrackBacks
This is the sixth post in the series about mechanisms of circadian entrainment, running all day today on this blog. In order to understand the content of this post, you need to read the previous five installments.
Read on »
Posted on August 16, 2006 1:59 PM • 0 Comments • 0 TrackBacks
This is the fifth post in a series about mechanism of entrainment.
Read on »
Posted on August 16, 2006 12:59 PM • 0 Comments • 0 TrackBacks
The fourth post in the series on entrainment explains the step-by-step method of constructing a PRC.
Read on »
Posted on August 16, 2006 11:59 AM • 0 Comments • 0 TrackBacks
The third post in the series on entrainment starts slowly to get into the meat of things...
Read on »
Posted on August 16, 2006 10:59 AM • 0 Comments • 0 TrackBacks
This is the second in a series of posts on the analysis of entrainment, explaining the basics of what entrainment is and how it is studied.
Read on »
Posted on August 16, 2006 9:59 AM • 0 Comments • 0 TrackBacks
This post covers the basic concepts and terms on entrainment. It was cited as a reference in a scientific review paper.
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Posted on August 16, 2006 8:59 AM • 3 Comments • 0 TrackBacks
Going into more and more detail, here is a February 11, 2005 post about the current knowledge about the circadian organization in my favourite animal - the Japanese quail.
Read on »
Posted on August 14, 2006 11:59 AM • 0 Comments • 0 TrackBacks
Moving from relatively simple mammalian model to more complex systems.
Read on »
Posted on August 14, 2006 10:59 AM • 0 Comments • 0 TrackBacks
This post describes the basic elements of the circadian system in mammals.
Read on »
Posted on August 14, 2006 9:59 AM • 0 Comments • 0 TrackBacks
The circadian clock is not a single organ, but an organ system comprised of all cells in the body linked in a hierarchical manner.
Read on »
Posted on August 14, 2006 8:59 AM • 0 Comments • 0 TrackBacks
As I announced last week, this week will be All Clocks All The Time. Why? First, I need to move some of the old posts from Circadiana over here, at a faster rate than I've been doing so far. Second,...
Posted on August 14, 2006 7:59 AM • 3 Comments • 0 TrackBacks
A short post from April 17, 2005 that is a good starting reference for more detailed posts covering recent research in clock genetics.
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Posted on August 7, 2006 10:58 AM • 4 Comments • 0 TrackBacks
How clock biologists think and how they design their experiments.
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Posted on July 31, 2006 10:59 AM • 0 Comments • 0 TrackBacks
Origin, Evolution, and Adaptive Function of Biological Clocks
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Posted on July 17, 2006 10:59 AM • 0 Comments • 0 TrackBacks
This post, originally published on January 16, 2005, was modified from one of my written p
