Science tracks down the training dangers

Article Abstract:

Scientific probes into the consequences of rigorous training schedules point to their adverse impact on human physiology. While common syndromes relate to grievous physical injuries, over-exercise aggravates dysfunction of the cardiovascular, respiratory and immune systems. The reproductive physiology of female athletes is also negatively affected. Clinical reports show that prolonged training augment cases of congenital heart condition, asthma and amenorrhea in athletes. With the high levels of physical and emotional stress involved, chronic fatigue is a major component of the over-training syndrome.

Health aspects, Injuries, Physiological aspects, Exercise, Exercise physiology, Sports

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...and biologists' work on protein energy converters

Article Abstract:

Three biologists, Jens Skou of Aarhus University, Denmark, Paul Boyer of the University of California and John Walker of the UK Medical Research Council's Laboratory of Molecular Biology, have been awarded the 1997 Nobel prize for chemistry. Jens Skou discovered the Na+/K+ pump, and Paul Boyer and John Walker have elucidated the mechanism of ATP synthase. However there was some surprise about the timing of the award to Boyer and Walker as many questions still remain about the mechanism of ATP synthase.

Achievements and awards, Biologists, Proteins, Adenosine triphosphate, ATP

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The core curriculum

Article Abstract:

Some genes in eukaryotes are copied into RNA faster than others because of the control exerted by proteins which bind to the DNA in and around the gene. Thus, the transcriptional initiation process is affected. The transcription factor TFIID contains a structure resembling that of the histones. TFIID is a target for transcriptional activators and serves to direct subsequent steps in the initiation process.

Analysis, Eukaryotic cells, Cells (Biology), Eukaryotes, Genetic transcription, Transcription (Genetics)

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