Thông nàng (Dacrycarpus imbricatus (Blume) de Laub.) là cây gỗ lớn, cao tới 35m, phân bố rộng rãi ở một số tỉnh của Việt Nam. Tinh dầu từ cành mang lá loài imbricatus) thu mẫu tại Khu bảo tồn thiên nhiên Xuân Nha, Mộc Châu, Sơn La, được chưng cất bằng phương pháp lôi cuốn hơi nước có hồi lưu. Hàm lượng tinh đạt 0,025% (theo nguyên liệu khô không khí). màu vàng nhạt, nhẹ hơn nước. Bằng sắc ký kh...

Volatile organic compounds (VOCs) in fermented honeybush, Cyclopia subternata, were sampled by means of a high-capacity headspace sample enrichment probe (SEP) and analyzed by gas chromatography-mass spectrometry (GC-MS). Stereochemistry was determined by means of enantioselective GC-MS with derivatized β-cyclodextrin columns as chiral selectors. A total of 183 compounds, the majority of which ...

Marigold oil is a product of great industrial interest thanks to its wide range medicinal and wound-healing properties. In this work, supercritical carbon dioxide was used recover marigold essential from the hexane solvent extract flowers, floral “concrete”. This starting material mixed with synthetic paraffinic waxes heighten melting point viscosity, thus, improving processability. Supercritic...

The extraction of bioactive plant components, which belong to specialized metabolites, is carried out by conventional and novel methods. In this study, a classical (hydrodistillation, HD) technique (microwave-assisted water extraction, MAE) were used isolate free volatile compounds from nine Croatian Veronica taxa (family Plantaginaceae). Each these extracts consists lipophilic phase an aqueous...

The morphological and essential oil diversity of Stachys lavandulifolia populations from the west northwest Iran were evaluated. results showed a significant difference between for nearly all evaluated traits. broadest variation ranges recorded auxiliary shoot length, leaf length in main branch, number flowers inflorescences. Furthermore, cluster analysis divided 13 into four separate groups. G...

Introdução: O diabetes mellitus é um distúrbio metabólico crônico, caraterizado pelo aumento da concentração de glicose no sangue (hiperglicemia). Óleos essenciais apresentam constituintes que podem auxiliar controle do com base em diversos mecanismos ação (estimulação produção insulina, inibição enzimática, entre outros), surgindo como candidatos promissores antidiabéticos. Objetivo: avaliar a...

The seasonal variation of the chemical composition of the essential oil from fresh leaves of Tetradenia riparia (Hochst.) Codd grown in southern Brazil was analyzed by GC-MS, and the analgesic and antimicrobial activities of this oil were assayed. The yield of essential oil ranged from 0.17% to 0.26%, with the maximum amount in winter and the minimum in spring. The results obtained from princip...

Abstract. Nursanty R, Padzil KNBM, Ramli NIB, Mahyudin NA, Jaafar AHB, Rukayadi Y. 2023. Phytochemical analysis of ethanolic Psidium guajava leaves extract using GC-MS and LC-MS. Biodiversitas 24: 2723-2732. L. is well known as guava has been used traditionally a medicinal plant for variety ailments all over the world, especially in infusions decoctions oral topical use. Every part this treatin...

The essential oils obtained by hydrodistillation from the stem, leaf and flower of Phlomis aucheri Boiss., which is endemic to Iran, stem, leaf and root of Teucrium polium L. and solvent free microwave extraction oil from leaf of Ajuga chamaecistus Ging. subsp. chamaecistus were analyzed by GC and GC/MS. Germacrene D (11.1%, 28.3% and 21.1%) was the main constituent in the stem, leaf and flower...