Mimosa tenuiflora (Willd.) Poir., popularly known as “black jurema”, is a plant that is predominant in the Caatinga Biome. Drinks used in indigenous rituals use the barks of this plant that are rich in N,N-dimethyltryptamine (DMT), an indolic alkaloid responsible for hallucinogenic activity. The objective of this study was to evaluate the chemical and pharmacognostic characteristics of the Mimosa tenuiflora bark using nuclear magnetic resonance(NMR) analytical techniques and gas chromatography coupled to mass spectrometry(GC-MS) to identify and quantify the DMT present in the extract of Mimosa tenuiflora. The results showed that the plant material is within the recommended standards. Both NMR and GC-MS techniques were able to identify and quantify the DMT with NMR being the best option. In conclusion this study contributes significantly to the standardization of the studied plant material and assists in the use of these data for future development of products from on this forestry species.

Metal–organic frameworks (MOFs) are promising materials for drug delivery due to their structural tunability and high surface area. This work reports on the synthesis of ZIF-8 for the in situ encapsulation of hesperidin, a flavonoid with poor water solubility used in the treatment of circulatory system disorders, as a gastric-targeted drug delivery system (DDS). A 2³ full factorial design was used to optimize drug loading, investigating the effects of DMSO concentration, 2-MIm/Zn²⁺ molar ratio, and final solution volume (water content). The materials were characterized by ATR-FT-IR, TG, XRD, and SEM analyses, confirming successful ZIF-8 synthesis and partial hesperidin encapsulation. Drug release kinetics were evaluated at pH 1.0 and 6.86. The system showed a faster and more pronounced release at pH 1.0, driven by MOF degradation, demonstrating its potential as a gastric-targeted DDS. This study confirms the feasibility of ZIF-8 to improve hesperidin solubility and bioavailability, highlighting a novel strategy for its therapeutic application.

Mimosa tenuiflora (Willd.) Poir., known as “Jurema‐preta”, is a species of ethnobotanical relevance, used in traditional medicine. The northeastern backland is characterized by climatic variability, which makes it essential to carry out studies that assess the seasonal influence on the chemical profile of native species. The aim of this study was to evaluate the seasonal variation in the chemical constituents of M. tenuiflora over a 24‐month period. Plant collections were made bimonthly in the municipality of Petrolina, Pernambuco, Brazil. The plant material was dried, pulverized, and extracted with ethanol (1:10, w/v) for 72 h under magnetic stirring. The analyses included the quantification of secondary metabolites, the development of a method using high‐performance liquid chromatography with a diode array detector for the quantification of N,N ‐dimethyltryptamine (DMT), and multivariate statistical analysis using principal component analysis. The results indicated that phenolic compounds, especially flavonoids, are associated with water stress, radiation, and temperature. DMT production showed a negative correlation with radiation and temperature, but not with precipitation. Total alkaloids and yield showed little correlation with climatic variables. This study reinforces the importance of seasonality in the planning of plant collection and the pharmacological use of M. tenuiflora . M. tenuiflora , “Jurema preta”, seasonality, HPLC‐DAD, PCA