Results 21 to 30 of about 59,325 (262)

The preparation and antioxidant activities of three phenyl-acylchitooligosaccharides

Heliyon, 2022
Chitooligosaccharides with two different molecular weights are acylated with three containing benzene carboxylic acids: salicylic acid (BHA), α-naphthylacetic acid (NAA) and indole-3-butyric acid (IBA) to obtain o-hydroxybenzoyl-chitooligosaccharide, α ...
Yao Liu, Fang Wen, Hehe Yang, Liangliang Bao, Zhihong Zhao, Zhimei Zhong   +5 more
doaj   +1 more source

Phosphorylated calix[4,8]arenes improve the RP HPLC separation of benzene derivatives

Журнал органічної та фармацевтичної хімії, 2020
Aim. To study the effect of 5,11,17,23-tetrakis(diisopropoxyphosphonyl)-25,26,27,28-tetrapropoxycalix[4]arene and oсtаkis(diethoxyphosphoryloxy)-tert-butylcalix[8]аrene additives to the MeCN – H2O mobile phase (86:14) on the selectivity of the separation
Olga I. Kalchenko, Myroslav O. Vysotsky, Serhii O. Cherenok   +2 more
doaj   +1 more source

N-alkylphenothiazines - synthesis, structure and application as ligands in metal complexes [PDF]

Hemijska Industrija, 2016
Phenothiazines are a large group of heterocyclic, aromatic molecules with nitrogen and sulphur between two benzene rings. Their derivatives, N-alkylphenothiazines have supstitutient on heterocyclic nitrogen atom which gives them different ...
Krstić Milena, Sovilj Sofija, Borozan Sunčica, Rančić Milica, Poljarević Jelena, Grgurić-Šipka Sanja R.   +5 more
doaj   +1 more source

Vibrational Relaxation in Several Derivatives of Benzene [PDF]

International Journal of Thermophysics, 2012
Acoustical spectroscopy at frequencies up to 10 GHz gives the possibility of the investigation of liquid substances, where the relaxation process observed is caused by energy transfer between translational and vibrational degrees of freedom. The compounds presented in this article belong to this group of liquids.
Linde, Bogumił B. J., Skrodzka, Ewa B., Lezhnev, Nikołaj B.   +2 more
openaire   +1 more source

Stilbenes: a promising small molecule modulator for epigenetic regulation in human diseases

Frontiers in Pharmacology, 2023
Stilbenes are characterized by a vinyl group connecting two benzene rings to form the basic parent nucleus. Hydrogen atoms on different positions of the benzene rings can be substituted with hydroQxyl groups.
Jing Tian, Li Jin, Hongquan Liu, Zichun Hua, Zichun Hua, Zichun Hua   +5 more
doaj   +1 more source

Polyfullerene Thin Films Applied as NH3 Sensors

Materials Research, 2021
Fullerene is considered to be the third carbon allotrope after diamond and graphite. The study of fullerene derivatives has been growing due to their exceptional electron affinity.
André Vítor Santos Simõis, Lucas Kaique Martins Roncaselli, Vinícius Jessé Rodrigues de Oliveira, Maria Eduarda Rocha Santos Medina, Hasina H. Ramanitra, M. Stephen, Deuber L. Silva Agostini, Roger C. Hiorns, Clarissa de Almeida Olivati   +8 more
doaj   +1 more source

New Sample Preparation Method for Honey Volatiles Fingerprinting Based on Dehydration Homogeneous Liquid–Liquid Extraction (DHLLE)

Molecules, 2018
Qualitative chemical fingerprinting of the honey volatiles by gas chromatography and mass spectrometry (GC-MS) has been an efficient authentication tool that allowed for the classification of the honey botanical origin (strongly related to its medicinal ...
Piotr M. Kuś, Igor Jerković
doaj   +1 more source

Preparation and Characterization of Urushiol Methylene Acetal Derivatives with Various Degrees of Unsaturation in Alkyl Side Chain

International Journal of Polymer Science, 2015
Preparation of urushiol derivatives was carried out in response to the drug industry’s increasing demand for new synthetic anticancer agents. Urushiol methylene acetal derivatives were synthesized in high yields by reaction of urushiol with methylene ...
Chengzhang Wang, Yuanfeng He, Hao Zhou, Ran Tao, Hongxia Chen, Jianzhong Ye, Yusi Zhang   +6 more
doaj   +1 more source

Structure-Activity Relationships of 3,3′-Phenylmethylene-bis-4-hydroxycoumarins: Selective and Potent Inhibitors of Gram-Positive Bacteria

The Scientific World Journal, 2013
Dicoumarols and coumarin derivatives have shown a variety of pharmaceutical activities and have been found to be potent inhibitor for the NAD(P)H-dependent flavoproteins.
Kanokporn Petnapapun, Warinthorn Chavasiri, Pornthep Sompornpisut   +2 more
doaj   +1 more source

Exposure to Benzene, Toluene, Ethylbenzene, and Xylenes and Risk of Depression: A Cross-sectional Study of a National Sample of Korean Adults [PDF]

Journal of Preventive Medicine and Public Health
Objectives: Benzene, toluene, ethylbenzene, and xylenes (BTEX) are co-occurring neurotoxicants that are structurally similar aromatic hydrocarbons sharing common metabolic pathways and mechanisms of toxicity.
Hyun-Wook Park, Byung-Sun Choi, Bomi Park, Wanhyung Lee, Weon-Young Lee   +4 more
doaj   +1 more source