Levels of Volatile Carbonyl Compounds in the Atlantic Rainforest, in the City of Rio de Janeiro.

When Europeans arrived in America, the Brazilian Atlantic rainforest covered approximately 1,290,000 km. Now, only 8% of the biome's original vegetation remains. One of the largest areas is Tijuca Forest National Park.

Silencing of Gonad-Inhibiting Hormone Transcripts in Litopenaeus vannamei Females by use of the RNA Interference Technology.

The method usually employed to stimulate gonadal maturation and spawning of captive shrimp involves unilateral eyestalk ablation, which results in the removal of the endocrine complex responsible for gonad-inhibiting hormone (GIH) synthesis and release. In the present study, RNAi technology was used to inhibit transcripts of GIH in Litopenaeus vannamei females. The effect of gene silencing on gonad development was assessed by analyzing the expression of GIH and vitellogenin, respectively, in the eyestalk and ovaries of L.