Results 1 to 10 of about 5,564 (213)

Partitioning Hückel–London Currents into Cycle Contributions

open access: yesChemistry, 2021
Ring-current maps give a direct pictorial representation of molecular aromaticity. They can be computed at levels ranging from empirical to full ab initio and DFT.
Wendy Myrvold   +2 more
doaj   +2 more sources

Untargeted metabolites profiling of volatile components of Chinese Antique Lotus (Nelumbo nucifera Gaertn.) using solid-phase microextraction (SPME) GC/MS [PDF]

open access: yesPeerJ
Floral scent is a crucial characteristic that significantly influences reproductive processes and indicates the ornamental value of many plants. Antique Lotus (Nelumbo), an important ornamental germplasm, has high archaeological and cultural value in ...
Haohui Wei   +8 more
doaj   +3 more sources

Bis-Indolyl Benzenoids, Hydroxypyrrolidine Derivatives and Other Constituents from Cultures of the Marine Sponge-Associated Fungus Aspergillus candidus KUFA0062

open access: yesMarine Drugs, 2018
A previously unreported bis-indolyl benzenoid, candidusin D (2e) and a new hydroxypyrrolidine alkaloid, preussin C (5b) were isolated together with fourteen previously described compounds: palmitic acid, clionasterol, ergosterol 5,8-endoperoxides ...
Suradet Buttachon   +2 more
exaly   +3 more sources

Zhang–Zhang Polynomials of Multiple Zigzag Chains Revisited: A Connection with the John–Sachs Theorem

open access: yesMolecules, 2021
Multiple zigzag chains Zm,n of length n and width m constitute an important class of regular graphene flakes of rectangular shape. The physical and chemical properties of these basic pericondensed benzenoids can be related to their various topological ...
Henryk A. Witek
doaj   +1 more source

Identification of long non-coding RNAs involved in floral scent of Rosa hybrida

open access: yesFrontiers in Plant Science, 2022
Long non-coding RNAs (lncRNAs) were found to play important roles in transcriptional, post-transcriptional, and epigenetic gene regulation in various biological processes. However, lncRNAs and their regulatory roles remain poorly studied in horticultural
Shaochuan Shi   +4 more
doaj   +1 more source

Essential Oil Composition and DNA Barcode and Identification of Aniba species (Lauraceae) Growing in the Amazon Region

open access: yesMolecules, 2021
Lauraceae species are widely represented in the Amazon, presenting a significant essential oil yield, large chemical variability, various biological applications, and high economic potential.
Júlia Karla A. M. Xavier   +8 more
doaj   +1 more source

Seasonal Variation in Essential Oil Composition and Antioxidant Capacity of Aniba canelilla (Lauraceae): A Reliable Source of 1-Nitro-2-phenylethane

open access: yesMolecules, 2023
Aniba canelilla (Kunth) Mez essential oil has many biological activities due to its main compound 1-nitro-2-phenylethane (1N2F), followed by methyleugenol, a carcinogenic agent.
Ellen de Nazaré S. da Cruz   +7 more
doaj   +1 more source

Stability order of isomeric benzenoid hydrocarbons and Kekulé structure count [PDF]

open access: yesJournal of the Serbian Chemical Society, 2009
The commonly accepted opinion that the thermodynamic stability of isomeric benzenoid hydrocarbons (assessed by their total π-electron energy and various resonance energies) increases with increasing number of Kekulé structures is shown to be violated in ...
SLAVKO RADENKOVIĆ, IVAN GUTMAN
doaj   +3 more sources

Metabolomic Profile of Indonesian Betel Quids

open access: yesBiomolecules, 2022
Consumption of areca nut alone, or in the form of betel quid (BQ), has negative health effects and is carcinogenic to humans. Indonesia is one of the largest producers of areca nuts worldwide, yet little is known about the biomolecular composition of ...
Pangzhen Zhang   +3 more
doaj   +1 more source

Automatic Optical Measurement and Control of Benzene and Benzenoids in Natural Gas Pipelines

open access: yesSensors, 2021
The presence of benzene and similar aromatic compounds in civil environments is due to anthropic actions but also to natural sources. Natural gas consists of a gas mixture where benzene and related compounds are usually presents.
Rossana Galassi   +3 more
doaj   +1 more source

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