Results 21 to 30 of about 237 (117)

Efeito do estresse hídrico sobre características de crescimento e a produção de óleo essencial de Melaleuca alternifólia Cheel

Acta Scientiarum. Agronomy, 2008
O efeito de estresse hídrico sobre o teor, a composição química do óleo essencial e o crescimento de Melaleuca alternifólia Cheel (Myrtaceae) foi estudado.
Silvia R.S. Silva, Antonio Jacinto Demuner, Luiz Claudio de Almeida Barbosa, Vicente Wagner Dias Casali, Evandro A. Nascimento, Antonio Lelis Pinheiro   +5 more
doaj   +1 more source

Composición química, propiedades antioxidantes y actividad antimicrobiana de propóleos mexicanos

Acta Universitaria, 2020
En México, los propóleos se ofertan por su actividad antioxidante y su actividad antimicrobiana, por lo cual es necesario realizar su análisis utilizando la norma de calidad mexicana.
Betsabé Rodríguez Pérez, María Margarita Canales Martínez, José Guillermo Penieres Carrillo, Tonatiuh Alejandro Cruz Sánchez   +3 more
doaj   +1 more source

Cannabidiol as a Neuroprotective Agent in Acrylamide‐Induced Neurotoxicity: Effects on Oxidative Stress, Inflammation, and Cholinergic Function in Male Mice

Journal of Neuroscience Research, Volume 103, Issue 12, December 2025.
Cannabidiol (CBD) protects against acrylamide‐induced neurotoxicity in mice by reducing oxidative stress, inflammation, and cholinergic dysfunction, while restoring BDNF levels. These findings highlight CBD's potential as a therapeutic agent for preventing environmental neurotoxicity and supporting brain health.
Korina Atsopardi, Konstantinos Mesiakaris, Ioannis Sotiropoulos, Marigoula Margarity, Konstantinos Poulas   +4 more
wiley   +1 more source

Flavonas, lignanas e terpeno de Piper umbellata (Piperaceae) [PDF]

Química Nova, 2009
The phytochemical investigation of Piper umbellata leaves yielded nine compounds including one terpenoid glucoside, five flavones (vitexin 2"-O-β-glucopyranoside, apigenin 8-C-β-D-glucopyranoside,orientin 8-C-β-D-glucopyranoside,5-hydroxy-7,3',4'-trimethoxy-flavone and velutin), two lignans (sesamin e dihydrocubebin) and 4-nerolidylcathecol.
Baldoqui, Debora Cristina, Bolzani, Vanderlan da Silva, Furlan, Maysa, Kato, Massuo J., Marques, Márcia O. M.   +4 more
openaire   +5 more sources

Medicinal cannabis extracts are neuroprotective against Aβ1–42‐mediated toxicity in vitro

Basic &Clinical Pharmacology &Toxicology, Volume 135, Issue 5, Page 575-592, November 2024.
Abstract Background Phytocannabinoids inhibit the aggregation and neurotoxicity of the neurotoxic Alzheimer's disease protein β amyloid (Aβ). We characterised the capacity of five proprietary medical cannabis extracts, heated and non‐heated, with varying ratios of cannabidiol and Δ9‐tetrahydrocannabinol and their parent carboxylated compounds to ...
Dylan T. Marsh, Mayu Shibuta, Ryuji Kato, Scott D. Smid   +3 more
wiley   +1 more source

La química detrás de los perfumes y fragancias

Tecnociencia Chihuahua
La química de los perfumes y esencias es un campo de la química de gran relevancia económica. Su origen data de la antigüedad cuando se utilizaban resinas y aceites esenciales en prácticas religiosas. Aunque en sus inicios su uso estaba restringido a la
Alejandro Camacho-Dávila, Jose Carlos Espinoza-Hicks, Carmen Melendez-Pizarro   +2 more
doaj   +3 more sources

Síntesis de nopol a partir de trementina: revisión del estado del arte

Ingeniería y Ciencia, 2012
En esta contribución se hace una revisión de los métodos para la síntesis del nopol. Los procesos convencionales abarcan la síntesis térmica y la catalítica con ZnCl2 y los emergentes corresponden a los catalíticos heterogéneos.
Edwin A Alarcón, Aída L Villa
doaj   +1 more source

Cannabidiol Modulation of Nicotine‐Induced Toxicity: Assessing Effects on Behavior, Brain‐Derived Neurotrophic Factor, and Oxidative Stress in C57BL/6 Male Mice

Journal of Neuroscience Research, Volume 102, Issue 9, September 2024.
High nicotine dose induces anxiety‐like behavior in mice in the Open Field Test, alongside oxidative stress, proinflammatory cytokine secretion, and brain‐derived neurotrophic factor (BDNF) reduction in brain regions. Cannabidiol acts as an anxiolytic, exhibiting antioxidant activities, reducing cytokines, and normalizing BDNF levels.
Konstantinos Mesiakaris, Korina Atsopardi, George Lagoumintzis, Marigoula Margarity, Konstantinos Poulas   +4 more
wiley   +1 more source

Extratos vegetais na agricultura e no tratamento de sementes

Revista Brasileira de Agroecologia, 2023
Em resposta aos efeitos nocivos da utilização de substâncias tóxicas na agricultura, a ciência tem avançado no desenvolvimento de soluções alternativas, visando compreender a eficácia e o potencial de extratos vegetais na agricultura.
Ricardo da Silva Carvalho
doaj   +1 more source

Confinement Effects in Catalysis: Steering the Product Selectivity in Cannabidiol Isomerization by the Resorcinarene Supramolecular Capsule

ChemCatChem, Volume 16, Issue 16, August 26, 2024.
The confinement effect provided by the resorcinarene hydrogen bonded capsule in the presence of HCl accelerates the isomerization of cannabidiol leading to cyclic and hydrated products that are uncommon compared to the same reaction with traditional strong Brønsted acids, thus widening the chemical scenario provided by the capsule.
Francesca Bordignon, Roberto Calmanti, Alvise Perosa, Fabrizio Fabris, Alessandro Scarso   +4 more
wiley   +1 more source