Comparative assessment of button cells using a normalized index for potential pollution by heavy metals.

Many household batteries worldwide still end up in landfills or are incinerated due to inefficient collection and recycling schemes. Toxic heavy metals from improperly discarded button cells pose a serious risk to human health and the environment, as they can pollute air, soil and water. This paper analyses a series of button cells selected from batteries available on the retail market, and compares their polluting potential.

[Somatometry in full-term newborns in Villahermosa, Tabasco, Mexico. Study of a middle-class population].

Objective: Realize a somatometric study in the Tabasco zone and compared this results with a similar study.

Design: Full term newborns without patology take weight, height and head circumference.

Setting: In Villahermosa City, Capital of Tabasco State in México, from march 1, 1988 to january 31, 1989.