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Researchers developed a reliable method to measure testosterone and epitestosterone in urine for medical and anti-doping use.

Intramuscular injection of 131I is a safe and effective way to induce hypothyroidism in rats without harming muscle tissue.

Changing protein kinase levels in pituitary cells affects calcium flow and beta-endorphin release.

Ancient South American mummies' hair shows high sulfur, calcium, and potassium levels.

The study found markers indicating that cells responsible for hair color are differentiating in specific areas of the hair follicle.

Infrared techniques reveal glycogen, unsaturated lipids, and calcium compounds in hair.

A new method accurately measures amino acids in treated hair, showing bleaching reduces amino acids while protein treatments increase them.

Barn owls with smaller black spots have higher testosterone levels, which might be due to genetic effects on hormone regulation rather than hormone effects on coloration.

A new method improves protein analysis in hair, aiding health and disease research.

The document suggests that human hair has electrical charges because of a gap in nerve cell coverage that affects electromagnetic radiation.

Individuals with this condition often develop male traits and identities at puberty despite being raised as females.

The method improved hair analysis for better forensic identification.

False high testosterone levels were corrected using a more accurate test.

Certain interactions help prepare the androgen receptor for pairing and activation, which is important for its role in development and disease.

Transplanted bone marrow cells actively move, form clusters, and grow after transplantation.

Women generally have higher levels of iron, copper, and zinc in their hair than men, with differences increasing with age.

A new method effectively predicts estrogen-related health effects for early screening.

CE-PTG detects early hair follicle issues in balding areas, helping measure male hair loss.

Lead can help reveal and organize lipids in human hair.

These methods help understand cell structures and reactions.

Human foreskin does not show aging or reduced cell growth after radiation, and H2A.J is not a good marker for radiation-induced aging.

Activating c-Myc in skin causes rapid cell growth and changes, but these effects are reversible.

Grizzly and black bears have different stress and hormone responses to salmon availability, influenced by nutrition and social competition.

Protein ubiquitylation is crucial for controlling stem cell functions and could be targeted for cancer treatment.

Certain metabolites may help diagnose and predict polycystic ovary syndrome.

Black-tailed deer have four types of pelages and molt twice a year.

Older steers have higher hair cortisol levels than younger steers.

Biliverdin IXβ and IXδ help Pseudomonas aeruginosa adapt to chronic infections.

A woman with a unique syndrome similar to TRPS has a genetic change near the TRPS1 gene, affecting its regulation.