The genus strychnos in colombia

Although the genus Strychnos is very well represented in Colombia, especially on the eastern lowlands drained by the tributaries of the Amazon, until recently, exceedingly few specimens of this genus from Colombia were available in the major herbaria of Europe and of the U. S. A. There appears to be no published record of the species that occur in Colombia.Although the genus Strychnos is very well represented in Colombia, especially on the eastern lowlands drained by the tributaries of the Amazon, until recently, exceedingly few specimens of this genus from Colombia were available in the major herbaria of Europe and of the U. S. A. There appears to be no published record of the species that occur in Colombia

Selective phosphodiesterase inhibitors: a promising target for cognition enhancement

# The Author(s) 2008. This article is published with open access at Springerlink.com Rationale One of the major complaints most people face during aging is an impairment in cognitive functioning. This has a negative impact on the quality of daily life and is even more prominent in patients suffering from neurodegenerative and psychiatric disorders including Alzheimer’s disease, schizophrenia, and depression. So far, the majority of cognition enhancers are generally targeting one particular neurotransmitter system. However, recently phosphodiesterases (PDEs) have gained increased attention as a potential new target for cognition enhancement. Inhibition of PDEs increases the intracellular availability of the second messengers cGMP and/or cAMP. Objective The aim of this review was to provide an overvie

Two New Species of Erythrina from Central America

Volume: 1Start Page: 286End Page: 28

Ipomoea alba

Angiosperm

Tetrapterys styloptera

Angiosperm

Machaerium macrophyllum var. brevialatum

Angiosperm

Supplementary notes on the American species of Strychnos. XIX

Volume: 46Start Page: 65End Page: 7

Byrsonima arthropoda

Angiosperm

Supplementary notes on American Menispermaceae---XVII. Neotropical Triclisieae and Anomospermeae

Volume: 50Start Page: 80End Page: 11