Antimicrobial, antioxidant, volatile and phenolic profiles of cabbage-stalk and pineapple-crown flour revealed by GC-MS and UPLC-MSE.

Unconventional parts of vegetables represent a rich source of health-promoting phytochemicals. The phenolic profile of cabbage-stalk flour (CSF), pineapple-crown flour (PCF), and their essential oils were characterized via UPLC-ESI-QTOF-MSE and GC-FID/MS. Antimicrobial activity was tested against five strains, and antioxidant activities were determined in free and bound extracts. Globally, 177 phenolics were tentatively identified in PCF (major p-coumaric acid, ferulic acid, and 4-hydroxybenzaldehyde) and 56 in CSF (major chlorogenicacid, quercetin 3-O-glucuronide, and p-coumaric acid). PCF exhibited a distinguished profile (lignans, stilbenes) and antioxidant capacity, especially in bound extracts (1.3 g GAE.100 g-1; 0.6 g catechin eq.100 g-1; DPPH: 244.7; ABTS: 467.8; FRAP: 762.6 µg TE.g-1, ORAC: 40.9 mg TE.g-1). The main classes of volatile compounds were fatty acids, their esters, and terpenes in CSF (30) and PCF (41). A comprehensive metabolomic approach revealed CSF and PCF as a promising source of PC, showing great antioxidant and discrete antimicrobial activities.

Fruit and vegetable residues flours with different granulometry range as raw material for pectin-enriched biodegradable film preparation.

The aim of this study was to develop biodegradable films using fruit and vegetable residue (FVR) flour with different granulometry range and pectin levels. The FVR flour was divided in three fractions, according to their granulometric distribution: A (425-500 µm), B (212-300 µm) and C (<150 µm). FVR presented heterogeneous particle size distribution and fibrous structure showing granular compounds adhered to the surface. The fiber contents decreased according to granulometry, whereas the protein content increased. The films obtained from FVR were malleable, homogeneous, yellowish, and presented high solubility (90%). The granulometry reduction and the pectin addition have significantly improved the viscosity and the yellow color of the film solutions (FS). There was decrease of solubility (50%) and improvement of the mechanical properties of the pectin-based films: decrease of elongation (16-30%) and increase of tensile strength (2.88 ±â€¯0.79 MPa). The sorption isotherms of the pectin-FVR films evidenced the lower availability of polar groups able to work as water-sorption sites. Therefore, different residue fractions could have different applications depending on their particle size and composition, either as source of dietary fibers (the thickest fractions) or as raw material for film production.

Chemistry and pharmacology of Monimiaceae: a special focus on Siparuna and Mollinedia.

The chemistry and pharmacology of species of the family Monimiaceae are reviewed, with special attention given to the genera Mollinedia and Siparuna, the two most important and representative in Brazil. The isolation of benzylisoquinoline alkaloids and kaempferol derivatives from Siparuna apiosyce is reported, as well as the isolation of aporphines from the fruits of Siparuna arianeae. Cinnamic acid derivatives and a gamma-lactone were isolated from Mollinedia gilgiana and Mollinedia marliae.