Johanna Sierra

• Pontifical Xavierian University

Datura metel is an annual herb, 0.5-1 m tall, slightly furry with violet stems, used as a narcotic and ornamental plant worldwide [1,2]. Flowers were collected from experimental plots in Colombia and lyophilized. Alkaloid extraction was done via MSPD using C18 silica and DCM, with cleaning in HCl and n-hexane. The extract was analyzed by GC/MS. Atr...

The Caribbean shrub, Clinopodium vimineum, had its essential oil (EO) and hydroalcoholic extracts analyzed across three growth stages: vegetative, flowering, and post-flowering. The chemical composition of the EOs was analyzed by GC/MS/FID and that of the extracts was studied by UHPLC/ESIQ-Orbitrap-MS. Twenty six compounds (>0.1%) were detected in...

Hyptis colombiana (Lamiaceae family), a species also treated as Cantinoa colombiana in a recently segregated genus from Hyptis, is a perennial herb or subshrub native to the Andes of northern South America. H. colombiana leaves are commonly used in traditional medicine to treat respiratory and digestive illnesses. In this study, H. colombiana plant...

The insertion of circular economy principles into the essential oil (EO) production chain aims to reduce waste generation and make integral use of harvested plant material. Higher profits from integral use with reduced waste generation contribute to the eventual use of the EO value chain as an alternative to illicit crops in Colombia (mostly coca)....

Salvia aratocensis (Lamiaceae) is an endemic shrub from the Chicamocha River Canyon in Santander (Colombia). Its essential oil (EO) was distilled from the aerial parts of the plant via steam distillation and microwave-assisted hydrodistillation and analyzed using GC/MS and GC/FID. Hydroethanolic extracts were isolated from dry plants before distill...

Plants of the genus Scutellaria (Lamiaceae) have a wide variety of bioactive secondary metabolites with diverse biological properties, e.g., anti-inflammatory, antiallergenic, antioxidant, antiviral, and antitumor activities. The chemical composition of the hydroethanolic extracts, obtained from dried plants of S. incarnata, S. coccinea, and S. ven...

Hibiscus rosa-sinensis plants are mainly cultivated as ornamental plants, but they also have food and medicinal uses. In this work, 16 H. rosa-sinensis cultivars were studied to measure their colorimetric parameters and the chemical composition of hydroethanolic extracts obtained from their petals. These extracts were characterized using UHPLC-ESI⁺...

Plants are sources of sunscreen ingredients that prevent cellular mutations involved in skin cancer and aging. This study investigated the sunscreen properties of the extracts from some ornamental plants growing in Colombia. The UV filter capability of the flower extracts obtained from Rosa centifolia L., Posoqueria latifolia (Rudge) Schult, and Ip...

In this work, we studied the potential photoprotective effect of Ipomoea horsfalliae Hook., Convolvulaceae, flower extract. Ipomoea horsfalliae is a plant that grows in tropical and subtropical regions. I. horsfalliae ethanolic extracts were analyzed by ultra-high efficiency liquid chromatography–high-resolution mass spectrometry. Dicaffeoylquinic...

Los cuerpos extraños (CE) constituyen una de las urgencias mas frecuentes en gastroenterología. Aunque la mayoría de estos pasan de forma espontanea, en algunos casos pueden causar perforaciones. Presentamos el caso de un paciente masculino de 32 años quien consultó de forma ambulatoria por un cuadro de dolor abdominal de 4 meses de evolución. Dent...