Linking changes in landscape structure to insect herbivory in forest edges and interiors of Atlantic Forest remnants.

Human activities have triggered profound changes in natural landscapes, resulting in species loss and disruption of pivotal ecological interactions such as insect herbivory. This antagonistic interaction is affected by complex pathways (e.g.

Improving the extraction yield of essential oil from Pimenta dioica (L.) Merr. using Aspergillus niger ATCC 1004 enzyme blend.

The objective of this work was to optimize the application of an enzymatic blend produced by Aspergillus niger ATCC 1004 on the Pimenta dioica fruits for essential oil extraction. The enzyme blend was obtained from the fermentation of cocoa bean shells, an agro-industrial residue. The effects of the enzymatic pre-treatment on the extraction yield, the chemical composition of the oil through gas chromatography, and the fruit structure through scanning electron microscopy (SEM) were assessed.

Methylxanthine and Flavonoid Contents from Guarana Seeds (): Comparison of Different Drying Techniques and Effects of UV Radiation.

Guarana seeds are typically processed using one of three drying methods: traditional sun exposure, greenhouse drying, or the oven technique. In our research, we evaluated the contents of methylxanthines and flavan-3-ols in sun- and -dried guarana seeds from Bahia State's Low Sul Identity Territory. Caffeine, theobromine, catechin, and epicatechin were determined by high-performance liquid chromatography with UV-visible detection (HPLC/UV-vis).

Flavonoids isolated from Kunth against resistant bacteria.

The antimicrobial activity of extract is reported in the literature; however, little is known about the presence of phenolic compounds and their antimicrobial activity in this species. This study aimed to isolate phenolic compounds with antimicrobial action from the leaves of . The ethanolic extract (VmL-Et) was submitted to sephadex column separation, and some fractions were submitted to derivatization with BSTFA and analysed by GC-MS.