Results 21 to 30 of about 23,681 (206)

Opium trade and use during the Late Bronze Age: Organic residue analysis of ceramic vessels from the burials of Tel Yehud, Israel

Archaeometry, EarlyView., 2022
Abstract Organic residue analysis was conducted on various vessels from burials at Tel Yehud, Israel. The analyses led to new reliable evidence for the presence of opioid alkaloids and their decomposition products. This research revitalizes a decades‐old discussion on the presence and function of the opium trade across a cultural region of utmost ...
Vanessa Linares, Eriola Jakoel, Ron Be’eri, Oded Lipschits, Ronny Neumann, Yuval Gadot   +5 more
wiley   +1 more source

Diboron- and Diaza-Doped Anthracenes and Phenanthrenes: Their Electronic Structures for Being Singlet Fission Chromophores.

Journal of Physical Chemistry A, 2020
We used quantum chemistry methods at the levels of mixed-reference spin-flipping time-dependent density functional theory and multireference perturbation theory to study diboron- and diaza-doped anthracenes and phenanthrenes.
Ekadashi Pradhan, Seunghoon Lee, C. Choi, Tao Zeng   +3 more
semanticscholar   +1 more source

Synthesis, Properties, and Reactivity of Bis-BN Phenanthrenes: Stepwise Bromination of the Main Scaffold.

Organic Letters, 2020
Two bis-BN phenanthrenes have been synthesized. Their photophysical properties are different from those of the reported mono-BN phenanthrenes. Moreover, the stepwise bromination of bis-BN phenanthrene 8 gave a series of brominated bis-BN phenanthrenes ...
Lingjian Zi, Jinyun Zhang, Chenglong Li, Yi Qu, Bin Zhen, Xuguang Liu, Lei Zhang   +6 more
semanticscholar   +1 more source

Synthesis and photophysical properties of new reactive fluorophenanthrenes

Comptes Rendus. Chimie, 2020
A series of six new suitably functionalized fluorophenanthrene derivatives were synthesized through a simple procedure, making use of inexpensive starting materials under mild conditions.
Hajri, Amira K., Albalawi, Marzough A., Elsayed, Nadia H., Aloui, Faouzi   +3 more
doaj   +1 more source

Gerardiins A–L and Structurally Related Phenanthrenes from the Halophyte Plant Juncus gerardii and Their Cytotoxicity against Triple-Negative Breast Cancer Cells

Journal of Natural Products, 2020
Species in the Juncaceae accumulate different types of secondary metabolites, among them phenanthrenes and 9,10-dihydrophenanthrenes in substantial amounts.
D. Stefkó, N. Kúsz, A. Barta, Z. Kele, László Bakacsy, Á. Szepesi, Csilla Fazakas, I. Wilhelm, I. Krizbai, J. Hohmann, A. Vasas   +10 more
semanticscholar   +1 more source

Source rock geochemistry of central and northwestern Niger Delta: Inference from aromatic hydrocarbons content

Energy Geoscience, 2023
The influence of origin, depositional environment and thermal maturity of organic matter on the occurrence of aromatic hydrocarbons in source rocks from the central and northwestern Niger Delta was investigated.
Akinsehinwa Akinlua, Olugbemiga Raphael Dada, Fuad Oluseyi Usman, Solomon Adeniyi Adekola   +3 more
doaj   +1 more source

Urinary carboxylic acid metabolites as possible novel biomarkers of exposures to alkylated polycyclic aromatic hydrocarbons

Environment International, 2021
Previous studies have found that alkylated polycyclic aromatic hydrocarbons (alkyl-PAHs) were more abundant in petrogenic sources (e.g., crude oil and its refined products) than pyrogenic sources of incomplete combustion.
Yan Lin, Xueyao Gao, Xinghua Qiu, Jinming Liu, Chi-Hong Tseng, Junfeng Jim Zhang, Jesus A Araujo, Yifang Zhu   +7 more
doaj   +1 more source

Tailoring Electronic Properties of Precision Graphene Nanoribbons via Nanopore Engineering

Angewandte Chemie, EarlyView.
Novel porous graphene nanoribbons incorporating [18]annulene nanopores, together with a nonporous GNR of identical width, have been synthesized. Spectroscopic and theoretical analyses reveal that nanopore incorporation effectively tunes their electronic properties by enlarging the bandgap, reducing charge‐carrier mobility, and modulating exciton ...
Kun Liu, Guanzhao Wen, Gianluca Serra, Nicolás Arisnabarreta, Hongde Yu, Andrea Lucotti, Yarden Peleg Walg, Hartmut Komber, Zhen‐Lin Qiu, Qing‐Song Deng, Ran He, Wenhui Niu, Thomas Heine, Eike Brunner, Mischa Bonn, Steven De Feyter, Matteo Tommasini, Hai I. Wang, Ji Ma, Xinliang Feng   +19 more
wiley   +2 more sources

Immune modulatory effect of a novel 4,5-dihydroxy-3,3´,4´-trimethoxybibenzyl from Dendrobium lindleyi.

PLoS ONE, 2020
Dendrobium bibenzyls and phenanthrenes such as chrysotoxine, cypripedin, gigantol and moscatilin have been reported to show promising inhibitory effects on lung cancer growth and metastasis in ex vivo human cell line models, suggesting their potential ...
Pichayatri Khoonrit, Alp Mirdogan, Adeline Dehlinger, Wanwimon Mekboonsonglarp, Kittisak Likhitwitayawuid, Josef Priller, Chotima Böttcher, Boonchoo Sritularak   +7 more
doaj   +1 more source

Iron-catalyzed synthesis of phenanthrenes via intramolecular hydroarylation of arene-alkynes

Journal of Saudi Chemical Society, 2019
An Fe(OTf)3-catalyzed intramolecular hydroarylation of arene-alkynes with high functional group tolerance has been reported, affording a series of phenanthrene derivatives efficiently. A low catalytic amount of Fe(OTf)3 is applied in this reaction.
Yang Li, Yawei Li, Xiao Hu, Guangxing Pan, Wangsheng Liu, Yaopeng Zhang, Hao Guo   +6 more
doaj   +1 more source