27 documents found, page 1 of 3
Mitochondrial genes from 18 angiosperms fill sampling gaps for phylogenomic inf...
Xue, Jia-Yu; Dong, Shan-Shan; Wang, Ming-Qiang; Song, Tian-Qiang; Zhou, Guang-Can; Li, Zhen; Van de Peer, Yves; Shao, Zhu-Qing; Wang, Wei; Chen, MinThe early diversification of angiosperms is thought to have been a rapid process, which may complicate phylogenetic analyses of early angiosperm relationships. Plastid and nuclear phylogenomic studies have raised several conflicting hypotheses regarding overall angiosperm phylogeny, but mitochondrial genomes have been largely ignored as a relevant source of information. Here we sequenced mitochondrial genomes f...
Essential oil from Euphorbia esula inhibits proliferation and induces apoptosis...
Lv, Dan; Pan, Li-hong; Zhang, Ren; Yang, Jie; Chen, Hao; Wen, Yanzhang; Huang, Mi; Ma , Xinhua; Wang, Qiang; Yang, XinzhouHepatocellular carcinoma is one of the most prevalent malignancies and a leading cause of cancer-related mortality worldwide. However, the therapies to prevent hepatocellular carcinoma are still limited and the emergence of drug resistance leads to the development of new anti-cancer drugs and combinational chemotherapy regimens. Our study was aimed to explore the anticancer effects of the essential oil extract ...
Coloured and low conductive fabrics by in situ laccase-catalysed polymerization
Su, Jing; Noro, Jennifer Martins; Fu, Jiajia; Wang, Qiang; Silva, Carla Manuela Pereira Marinho; Cavaco-Paulo, ArturColoured and conductive fabrics were obtained through in situ laccase polymerization of catechol and p-phenylenediamine under high-pressure homogenization. Both monomers, catechol and p-phenylenediamine, were polymerized by different laccase forms, namely native, PEGylated and Epoxy-PEGylated. All the catalysts were placed inside a textile fabric bag which served simultaneously as enzyme support and as substrat...
Changes on content, structure and surface distribution of lignin in jute fibers...
Dong, Aixue; Fan, Xuerong; Wang, Qiang; Yu, Yuanyuan; Wang, Ping; Yuan, Jiugang; Cavaco-Paulo, ArturEffect of laccase treatment on the content, structure, and surface distribution of lignin in jute fibers were fundamentally investigated. Four percent lignin was removed from jute fibers via the laccase treatment. The residual lignin in the laccase-treated jute fibers showed increased molecular weights, which indicated polymerization between lignins on jute fibers. Meanwhile, the phenolic hydroxyl content in li...
Conductive cotton by in situ laccase-polymerization of aniline
Su, Jing; Shim, Euijin; Noro, Jennifer Martins; Fu, Jiajia; Wang, Qiang; Kim, Hye Rim; Silva, Carla Manuela Pereira Marinho; Cavaco-Paulo, ArturConductive cotton fabrics were obtained via in situ aniline polymerization by laccase from Myceliophthora thermophila under mild reaction conditions without the addition of strong proton acids. The reactions were conducted using two types of reactors, namely a water bath (WB) and an ultrasonic bath (US), and the role of a mediator, 1-hydroxybenzotriazol (HBT), on the laccase-assisted polymerization of aniline w...
Exploring PEGylated and immobilized laccases for catechol polymerization
Jing Su; Noro, Jennifer Martins; Fu, Jiajia; Wang, Qiang; Silva, Carla; Cavaco-Paulo, ArturLaccases have been reported for their ability to eliminate hazardous phenolic compounds by oxidative polymerization. The exploitation of the oxidative behavior of different laccase forms, namely free/native, free/PEGylated, immobilized/native and immobilized/PEGylated, was assessed in this study. We found that PEGylated and immobilized laccase forms have differentiated catalytic behavior revealing distinct conv...
Enzymatic polymerization of catechol under high-pressure homogenization for the...
Su, Jing; Noro, Jennifer Martins; Fu, Jiajia; Wang, Qiang; Silva, Carla; Cavaco-Paulo, ArturLaccase from Myceliophthora thermophila was used to catalyze the polymerization of catechol under high-pressure homogenization for the green coloration of textile substrates. The oxidation reactions were conducted using different forms of laccase, namely native laccase, PEGylated laccase and PEGylated laccase immobilized onto an epoxy resin. The three enzyme forms were deposited inside a polyester fabric bag du...
Laccase: a green catalyst for the biosynthesis of poly-phenols
Jing Su; Fu, Jiajia; Wang, Qiang; Silva, Carla Manuela Pereira Marinho; Cavaco-Paulo, ArturLaccases (benzene diol: oxidoreductases, EC 1.10.3.2) are able to catalyze the oxidation of various compounds containing phenolic and aniline structures using dissolved oxygen in water. Laccase structural features and catalytic mechanisms focused on the polymerization of aromatic compounds are reported. A description about the most recent research on the biosynthesis of chemicals and polymers is made. Selected ...
The effect of high-energy environments on the structure of laccase-polymerized ...
Jing Su; Castro, T.; Noro, Jennifer Martins; Fu, Jiajia; Wang, Qiang; Silva, C.; Cavaco-Paulo, ArturThe laccase polymerization of catechol was performed using different reactors namely a water bath (WB), an ultrasonic bath (US) and a high-pressure homogenizer (HPH). The total content of free OH and the MALDI-TOF spectra of polymers obtained demonstrated that reactions are favored in the presence of high-energy environments. Higher conversion yields and polymerization degrees (DP) were obtained after polymeriz...
Ultrasound-assisted lipase catalyzed hydrolysis of aspirin methyl ester
Chiplunkar, Pranali P.; Zhao, Xiaoman; Tomke, Prerana D.; Noro, Jennifer; Xu, B.; Wang, Qiang; Silva, Carla; Pratap, Amit P.; Cavaco-Paulo, ArturThe ultrasound-assisted hydrolysis of aspirin methyl ester (AME) was investigated using immobilized Candida antarctica lipase B (CALB) (1%) in the presence of solvents like triolein, chloroform (CHCl3) and dichloromethane (DCM). The effect of ultrasound and the role of water on the conversion rates have also been investigated. Proton nuclear magnetic resonance spectroscopic (1H NMR) was chosen to calculate hydr...