Results 1 to 10 of about 438,292 (352)

Synthesis, structure analysis and antibacterial activity of N-[5-dehydroabietyl-[1,3,4]thiadiazol-2-yl]-aromatic amide derivatives

Journal of Saudi Chemical Society, 2017
A series of N-[5-dehydroabietyl-[1,3,4]thiadiazol-2-yl]-aromatic amide derivatives were synthesized from dehydroabietic acid. Their structures were characterized by IR, 1H NMR, MS, elemental analysis and single crystal X-ray diffraction.
YanJie Cui, XiaoPing Rao, ShiBin Shang, ZhanQian Song, MingGui Shen, He Liu   +5 more
doaj   +1 more source

Isolation of Sulfuretin and Butin from Rhus verniciflua Stokes Using Medium-pressure Liquid Chromatography and their Tyrosinase Inhibitory Effects

BioResources, 2015
The aim of this study was to separate antityrosinase compounds of the ethyl acetate fraction from Rhus verniciflua Stokes using medium pressure liquid chromatography.
Hongxia Chen, Chengzhang Wang, Jianzhong Ye, Hao Zhou, Ran Tao   +4 more
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

Enzymatic Hydrolysis of Oleuropein from Olea europea (Olive) Leaf Extract and Antioxidant Activities

Molecules, 2015
Oleuropein (OE), the main polyphenol in olive leaf extract, is likely to decompose into hydroxytyrosol (HT) and elenolic acid under the action of light, acid, base, high temperature.
Jiao-Jiao Yuan, Cheng-Zhang Wang, Jian-Zhong Ye, Ran Tao, Yu-Si Zhang   +4 more
doaj   +1 more source

Chemical Constituents and Structural Characterization of Polysaccharides from Four Typical Bamboo Species Leaves

Molecules, 2015
In order to find bamboo leaves with high contents of bioactive polysaccharides, 32 samples were chosen to analyze their polysaccharide content by GC and sulfuric acid-anthrone colorimetric assays.
Cheng-Zhang Wang, Hong-Yu Zhang, Wen-Jun Li, Jian-Zhong Ye   +3 more
doaj   +1 more source

Effect of Variety and Maturity Index on the Physicochemical Parameters Related to Virgin Olive Oil from Wudu (China)

Foods, 2022
Physical parameters (i.e., extraction yield, oil content), chemicals (i.e., fatty acids, phenolics) and oxidative stability associated with virgin olive oil (VOO) from ten varieties in Wudu, China, were analyzed as a function of maturity index and ...
Fengxia Tang, Chuan Li, Xiaoran Yang, Jiandu Lei, Hongxia Chen, Changwei Zhang, Chengzhang Wang   +6 more
doaj   +1 more source

The Pretreatment of Lignocelluloses With Green Solvent as Biorefinery Preprocess: A Minor Review

Frontiers in Plant Science, 2021
Converting agriculture and forestry lignocellulosic residues into high value-added liquid fuels (ethanol, butanol, etc.), chemicals (levulinic acid, furfural, etc.), and materials (aerogel, bioresin, etc.) via a bio-refinery process is an important way ...
Xiaoyan Yin, Linshan Wei, Xueyuan Pan, Chao Liu, Jianchun Jiang, Jianchun Jiang, Kui Wang, Kui Wang   +7 more
doaj   +1 more source

Reduced-Pressure Boiling Extraction of Oleuropein Coupled with Ultrasonication from Olive Leaves (Olea europaea L.)

Advances in Materials Science and Engineering, 2015
Oleuropein was extracted from Frantoio olive leaves using reduced-pressure boiling extraction coupled with ultrasound-assist (URPE). Four important factors, extraction temperature, ultrasonic power, ethanol concentration, and the ratio of solid to liquid,
Pu-jun Xie, Li-xin Huang, Cai-hong Zhang, Feng You, Cheng-zhang Wang, Hao Zhou   +5 more
doaj   +1 more source

Enhanced Bleachability of Chemi-Thermomechanical Pulp by Hydrogen Peroxide Bleaching in Ethanol-Water Media

BioResources, 2023
Hydrogen peroxide (H2O2) bleaching in ethanol-water media was used to improve the bleaching efficiency of the chemi-thermomechanical pulp (CTMP). The brightness of CTMP increased and the yellowness decreased when the ethanol ratio was increased to 50 ...
Jin Ho Seo, Yu-jin Oh, Kyojung Hwang, Jaegyoung Gwon, Byeong-Jun Ahn, Kang-Jae Kim, Tai-Ju Lee   +6 more
doaj   +2 more sources

A Strategy for Nonmigrating Plasticized PVC Modified with Mannich base of Waste Cooking Oil Methyl Ester

Scientific Reports, 2018
The waste cooking oil (WCO) production from the catering industry and food processing industry causes serious environmental, economic and social problems. However, WCO can be used for the preparation of fine chemicals such as internal plasticizer.
Puyou Jia, Meng Zhang, Lihong Hu, Fei Song, Guodong Feng, Yonghong Zhou   +5 more
doaj   +1 more source