Results 51 to 60 of about 31,846 (218)

Differentiation of argentine propolis from different species of bees and geographical origins by UV spectroscopy and chemometric analysis [PDF]

, 2018
Bees collect vegetal resins that they mix with their wax and mechanical impurities to elaborate propolis, whose chemical composition is complex and variable depending on botanical/geographical origin, type of bee, time of year when it was produced and ...
Borelli, Romina, Borelli, Valeria Soledad, Gennari, Gerardo, Isla, Maria Ines, Maldonado, Luis María, Marcinkevicius, Karenina, Salomón, Virginia, Vera, Nancy   +7 more
core   +2 more sources

Enzymatic Synthesis of Demethylated Sesquiterpenes From 14‐nor‐Farnesyl Pyrophosphate

European Journal of Organic Chemistry, EarlyView.
The substrate analog 14‐nor‐FPP was synthesised and enzymatically converted with 10 bacterial and fungal sesquiterpene synthases, resulting in the isolation of 12 demethylated sesquiterpenes in yields up to 17%. In most cases the demethyl analogs of the FPP‐derived natural products were obtained, but also different products showing modified ...
Kizerbo A. Taizoumbe, Jeroen S. Dickschat   +1 more
wiley   +1 more source

Inhibition of MurA Enzyme from Escherichia coli and Staphylococcus aureus by Diterpenes from Lepechinia meyenii and Their Synthetic Analogs

Antibiotics, 2021
Enzymes MurA and MurF, involved in bacterial cell wall synthesis, have been validated as targets for the discovery of novel antibiotics. A panel of plant-origin antibacterial diterpenes and synthetic analogs derived therefrom were investigated for their ...
Macarena Funes Chabán, Martina Hrast, Rok Frlan, Dafni G. Graikioti, Constantinos M. Athanassopoulos, María Cecilia Carpinella   +5 more
doaj   +1 more source

Diterpenes from Sideritis ferrensis [PDF]

Phytochemistry, 1991
The new diterpenes candol A acetate, trachinodiol diacetate, ent-18-acetoxy-16a-hydroxy-artisane, and ent-17,18-dihydroxy-kaur-15-ene (ferrediol) have been isolated from Sideritis ferrensis.
Fraga, Braulio M., Hernández, Melchor G., Santana, José M. H., Arteaga, José M.   +3 more
openaire   +2 more sources

Evaluation of Agave angustifolia as a Sustainable Alternative to Synthetic Pesticides: Phytochemical Composition and Multi‐Trophic Bioactivity

Flavour and Fragrance Journal, EarlyView.
The pesticidal potential of Agave angustifolia by assessing its anti‐nematic, antimicrobial, and insecticidal activities, alongside phytochemical profiling. ABSTRACT Plant diseases caused by fungi, bacteria, nematodes, and viruses contribute significantly to annual crop losses and economic hardship. Reliance on chemical pesticides, over a thousand used
Rashika Tamta, Shilpi Rawat, Himani Karakoti, Tannu Rani, Pooja Bargali, Ravendra Kumar, Stefania Garzoli, Renu Pandey   +7 more
wiley   +1 more source

Chemical and antimicrobial analyses of Sideritis romana L. subsp. purpurea (Tal. ex Benth.) Heywood, an endemic of the Western Balkan [PDF]

, 2017
A comprehensive study on essential oil and different solvent extracts of Sideritis romana L. subsp. purpurea (Tal. ex Benth.) Heywood (Lamiaceae) from Montenegro is reported. The gas chromatography-mass spectrometry analysis of the essential oil revealed
Božović, Mijat, Cipolla, Alessia, De Angelis, Massimiliano, Garzoli, Stefania, Oliva, Alessandra, Ragno, Rino, Tadić, Vanja, Vullo, Vincenzo   +7 more
core   +1 more source

Metabolic Plasticity and Terpenoid Modulation in Zanthoxylum armatum Callus Cultures: Chemical Composition and Biotechnological Perspectives

Flavour and Fragrance Journal, EarlyView.
Graphical abstract illustrating the metabolic dynamics and regulation of terpenoid production in Zanthoxylum armatum callus cultures. On the left, callus initiation and growth from explants are shown, followed by the establishment of suspension cultures.
Sumit Purohit, Balwant Rawat, Ravendra Kumar, Mrinalini Agarwal, Somya Sinha, Shivani Negi, Namini Joshi, Akshita Raj, Prabhakar Semwal, A. Dheerani, Janhvi Mishra Rawat, Mozaniel Santana de Oliveira   +11 more
wiley   +1 more source

Diterpenoid Diversity across Land Plants

Helvetica Chimica Acta, EarlyView.
Here we bridge the knowledge of diterpene chemical diversity, biosynthesis, and evolution from nonvascular mosses and liverworts to that known from vascular plants. ABSTRACT The diverse array of diterpenoid natural products stems from the ease of manipulating the promiscuity of diterpene cyclases.
Anita Berg, Chad K. Papenfuhs, Amy E. Fraley   +2 more
wiley   +1 more source

Chemotaxonomy of three genera of the annonaceae family using self-organizing maps and 13C NMR data of diterpenes

Química Nova, 2012
The Annonaceae family is distributed throughout Neotropical regions of the world. In Brazil, it covers nearly all natural formations particularly Annona, Xylopia and Polyalthia and is characterized chemically by the production of sources of terpenoids ...
Luciana Scotti, Josean Fechine Tavares, Marcelo Sobral da Silva, Emanuela Viana Falcão, Luana de Morais e Silva, Gabriela Cristina da Silva Soares, Marcus Tullius Scotti   +6 more
doaj   +1 more source

Exploration of the Phytochemical and Antidiabetic Properties of Teucrium polium: A Natural Asset for Type 2 Diabetes Management

ChemistryOpen, EarlyView.
Teucrium polium shows antidiabetic activity with its phytochemical composition and biological activities. The essential oil is rich in carvacrol, thymol, γ‐terpinene, and o‐cymene, while the aqueous and hydroethanolic extracts are characterized by poliumoside, verbascoside, isorhamnetin‐3‐O‐rutinoside, and apigenin‐7‐rutinoside. Antioxidant activity is
Hajar El Ouadni, Aziz Drioiche, Fadoua El Makhoukhi, Omkulthom Al kamaly, Hannou Zerkani, Smail Amalich, Imane Tagnaout, Mohamed Radi, Yahya Cherrah, Touriya Zair, Katim Alaoui   +10 more
wiley   +1 more source