estrógeno

Conjunto de hormonas esteroideas (incluyendo el estradiol) que afectan el desarrollo de la diferenciación sexual y la función reproductiva en adultos.

estrógenos no esteroidales

Agricultura; Agricultura general

Non-steroidal compounds with estrogenic activity.

enfermedad endémica

Antropología; Antropología física

A disease that remains at a more or less constant frequency of affected individuals in a population all of the time. Examples: hypertension, tooth decay, and malaria.

polimorfismo

Antropología; Antropología física

A genetic trait controlled by more than one allele, each of which has a frequency of 1% or greater in the population gene pool. See balanced polymorphism.

termoluminiscencia (TL)

Antropología; Antropología física

A radiometric dating method based on the fact that trace amounts of radioactive atoms, such as uranium and thorium, in some kinds of rock, soil, and clay produce constant low ...

modelo de asimilación

Antropología; Antropología física

A hypothesis to explain the origin of modern Homo sapiens. It proposes that the first modern humans evolved in Africa, but when they migrated into other regions they did not ...

potasio-argón

Antropología; Antropología física

A radiometric dating method based on the fact that potassium-40 in volcanic rock decays into argon-40 and calcium-40 at a known rate. The half-life of potassium-40 is ...

pedernal

Antropología; Antropología física

A kind of hard, rock with a glassy opaque appearance. It was a favorite raw material for many prehistoric humans for the manufacture of tools such as knives and scraping ...