Filters








13,724 Hits in 3.4 sec

Phytochemicals of Euphorbia lathyris L. and Their Antioxidant Activities

Lizhen Zhang, Chu Wang, Qiuxia Meng, Qin Tian, Yu Niu, Wei Niu
2017 Molecules  
The objectives of this study were to characterize the antioxidant capacities and phytochemicals such as phenolics and flavonoids in four parts of Euphorbia lathyris L. HPLC was employed to detect the type and content of phenolic acids and flavonoids in the root, stem, seed, and testa of the plant. The total phenolic content (TPC) and total flavonoid content (TFC) were different among various parts of E. lathyris. The highest TPC were found in the testa (290.46 ± 15.09 mg of gallic acid
more » ... g dry weight (DW)). However, the root contained the highest TFC (215.68 ± 3.10 mg of rutin equiv/g DW). Of the different antioxidant activities detected, DPPH free radical scavenging activity was highest in the testa (61.29 ± 0.29 mmol Trolox/100 g DW), but the highest FRAP antioxidant activity was found in the seed (1131.25 ± 58.68 mg FeSO 4 /100 g DW of free compounds and 1927.43 ± 52.13 mg FeSO 4 /100 g DW of bound compounds). There was a positive correlation between the total phenolic contents and DPPH free radical scavenging activity in different parts of E. lathyris. Molecules 2017, 22, 1335 2 of 12 most previous studies have reported different profiles of grains. There is only limited literature on the complete profile (free and bound) of the chemical compounds of herbs. Medicinal plant parts have multiple biological effects including antioxidant activity. In spite of its hydrocarbon-like compounds and medicinal benefits, no data have been previously reported on the antioxidative activity of E. lathyris. Previous studies found that the seeds contained fats, proteins, coumarins, and a series of diterpenoids, but the study of phenolic compounds and flavonoids in different parts of E. lathyris is still very rare. Therefore, the objectives of the present study were (1) to determine the phytochemical profiles of the total phenolic and flavonoid contents, including both free and bound forms; and (2) to determine the antioxidant activity in different parts of E. lathyris.
doi:10.3390/molecules22081335 pmid:28820480 fatcat:rk33edhnwbd7zalthl3li5ky5a

Nuclear potentials relevant to the symmetry energy in chiral models [article]

Niu Li, Si-Na Wei, Wei-Zhou Jiang
2021 arXiv   pre-print
Nuclear potentials relevant to the symmetry energy in chiral models Niu  ...  Wei, R. Y. Yang, and W. Z. Jiang, Chin. Phys. C [23] W. Z. Jiang, B. A. Li, and L. W. Chen, Phys. Lett. B 42, 054103 (2018). 653, 184 (2007).  ... 
arXiv:2112.02328v1 fatcat:gbkfckyksnatjkok6earu2v7vi

Fabrication of Microfluidic Chips Using Laser Click Deposition

Mengqi Lv, Xinyu He, Kai Zhou, Ben Niu, Wei Wei, Haoran Li, Shasha Liu, Hua Su, Wei Wang
2022 Sensors & Diagnostics  
Here we proposed a programmable and low-cost laser click deposition (LCD) method to form complicated CuO patterns as master templates for fabricating microfluidic chips. It was based on the heat-induced...
doi:10.1039/d2sd00060a fatcat:7vrj3axvpbe3vax7m5paitsyx4

Emergence of Abstaining in Glauber Opinion Dynamics

Bao Long Niu, Wei Wei
2013 Applied Mechanics and Materials  
We study the evolution of Glauber opinion dynamics with abstaining and tunable threshold on random graphs. The phase diagram shows plentiful features in the space of the two parameters of the model, the threshold and the abstaining probability. It is found that the threshold that limits the agents to be stable plays an important role in the emerging of abstaining in a wide spread. And it can be obtained that the observables stay the same in frozen state whatever the initial density of 0 is. We
more » ... lso use the mean field calculations to verify the fact of linearity between the density of 0 and the abstaining probability.
doi:10.4028/www.scientific.net/amm.347-350.3827 fatcat:qm3aswusw5b7vgpnwltqu644qa

Review of Anhoplocampa Wei (Hymenoptera, Tenthredinidae), with description of a new species and a new combination

Meicai Wei, Gengyun Niu
2011 ZooKeys  
Citation: Wei M, Niu G (2011) Review of Anhoplocampa Wei (Hymenoptera, Tenthredinidae), with description of a new species and a new combination. ZooKeys 159: 81-90.  ...  Taxonomy Anhoplocampa Wei, 1998 http://species-id.net/wiki/Anhoplocampa Anhoplocampa Wei, 1998: 14. Type species: Anhoplocampa fumosa Wei, 1998, by original designation. Description.  ...  Wei, 1998 http://species-id.net/wiki/Anhoplocampa_fumosa Figs 14-18 Anhoplocampa fumosa Anhoplocampa fumosa Wei, 1998: 15. Description. Female (holotype, Fig. 14) .  ... 
doi:10.3897/zookeys.159.2476 pmid:22303116 pmcid:PMC3253638 fatcat:7j52qqogkbhiri2dkrzidilg5q

Characterization of the mitochondrial genome of Arge bella Wei & Du sp. nov. (Hymenoptera: Argidae)

Shiyu Du, Gengyun Niu, Tommi Nyman, Meicai Wei
2018 PeerJ  
We describe Arge bella Wei & Du sp. nov., a large and beautiful species of Argidae from south China, and report its mitochondrial genome based on high-throughput sequencing data.  ...  Separate the geographical proper name from the geographical feature name and capitalize the first letter of both (Niu, Wei & Taeger, 2012) .  ...  These additional taxa represented five families: Tenthredinidae (Wei, Wu & Liu, 2015; Wei, Niu & Du, 2014; Song et al., 2015a; Song et al., 2016) , Cimbicidae (Song et al., 2016; Doǧan & Korkmaz, 2017  ... 
doi:10.7717/peerj.6131 pmid:30595984 pmcid:PMC6305119 fatcat:l4w43elbp5ebrle4um3stf3l34

Norcantharidin Suppresses Colon Cancer Cell Epithelial-Mesenchymal Transition by Inhibiting the αvβ6-ERK-Ets1 Signaling Pathway

Cheng Peng, Zequn Li, Zhengchuan Niu, Wei Niu, Zongquan Xu, Huijie Gao, Weibo Niu, JiaYong Wang, Zhaobin He, Chao Gao, Pengfei Lin, Michael Agrez (+2 others)
2016 Scientific Reports  
Niu were responsible for designing and performing the study, literature research and manuscript writing; W. Niu, Z. Xu, H. Gao, W. Niu, and J.  ...  Niu, M. Agrez and Z. Zhang were responsible for designing the study and critical review of manuscript; C. Peng, Z. Li, and Z.  ... 
doi:10.1038/srep20500 pmid:26846153 pmcid:PMC4742802 fatcat:c7pbvbr5czcttive5kavp4s5tq

Optimized Pretreatment of Kenaf (Hibiscus cannabinus) Phloem Insulation Cotton

Wei Wei, Tingjie Chen, Min Niu, Yongqun Xie, Xiaodong Wang
2016 BioResources  
The mechanical properties of foaming materials have been improved by inorganic compounds (Xie and Liu 2012; Lin et al. 2013; Niu et al. 2014) .  ... 
doi:10.15376/biores.11.1.2583-2596 fatcat:nywopbbptfegjgtrgj5dd35c3y

Nuclear Potentials Relevant to the Symmetry Energy in Chiral Models

Niu Li, Si-Na Wei, Wei-Zhou Jiang
2022 Symmetry  
We employ the extended Nambu-Jona-Lasinio (NJL), linear-σ models, and the density-dependent model with chiral limits to work out the mean fields and relevant properties of nuclear matter. To have the constraint from the data, we re-examine the Dirac optical potentials and symmetry potential based on the relativistic impulse approximation (RIA). Unlike the extended NJL and the density-dependent models with the chiral limit in terms of the vanishing scalar density, the extended linear-σ model
more » ... a sluggish changing scalar field loses the chiral limit at the high-density end. The various scalar fields can characterize the different Schrödinger-equivalent potentials and kinetic symmetry energy in the whole density region and the symmetry potential in the intermediate density region. The drop in the scalar field due to the chiral restoration results in a clear rise of the kinetic symmetry energy. The chiral limit in the models gives rise to the softening of the symmetry potential and thereof the symmetry energy at high densities.
doi:10.3390/sym14030474 fatcat:gmpakwslq5c5lmh4pii6zxqylu

Multi-materials beam hardening artifacts correction for computed tomography (CT) based on X-ray spectrum estimation [article]

Wei Zhao, Dengwang Li, Kai Niu, Wenjian Qin, Hao Peng, Tianye Niu
2018 arXiv   pre-print
Due to the energy-dependent nature of the attenuation coefficient and the polychromaticity of the X-ray source, beam hardening effect occurs when X-ray photons penetrate through an object, causing a nonlinear projection data. When a linear reconstruction algorithm, such as filtered backprojection, is applied to reconstruct the projection data, beam hardening artifacts which show as cupping and streaks are present in the CT image. The aim of this study was to develop a fast and accurate beam
more » ... ening correction method which can deal with beam hardening artifacts induced by multi-materials objects. Based on spectrum estimation, the nonlinear attenuation process of the X-ray projection was modeled by reprojecting a template image with the estimated polychromatic spectrum. The template images were obtained by segmenting the uncorrected into different components using a simple segmentation algorithm. Numerical simulations, experimental phantom data and animal data which were acquired on a modern diagnostic CT scanner (Discovery CT750 HD, GE Healthcare, WI, USA) and a modern C-Arm CT scanner (Artis Zee, Siemens Healthcare, Forchheim, Germany), respectively, were used to evaluate the proposed method. The results show the proposed method significantly reduced both cupping and streak artifacts, and successfully recovered the Hounsfield Units (HU) accuracy.
arXiv:1812.02365v1 fatcat:sieppgjx5nf2tiaa66fraftzvm

Application of Multiple Wind Retrieval Algorithms in Nowcasting

Nan Li, Ming Wei, Ben Niu, Jiawen Pan, Wengang Zhang, Wei Guo
2015 Atmosphere  
Multiple wind retrieval algorithms are performed to retrieve wind fields, based on which radar reflectivity is extrapolated to implement nowcasting. The frequently used nowcasting algorithm COTREC (continuity of tracking radar echo by correlation), based on the reflectivity and wind retrieval algorithm GVAD (gradient velocity azimuth display), based on radial velocity are used. The wind fields retrieved by the two methods are taken as motion vectors to give a 60-min forecast of radar
more » ... y. Comparison analysis on precipitation events shows that GVAD can be used in operational nowcasting as COTREC performs and for stable precipitation duration, COTREC gives better nowcasting results than GVAD, while, for evolving precipitation duration, GVAD gives better nowcasting results than COTREC.
doi:10.3390/atmos6060834 fatcat:z3n4zisudnfhbnfaargwsqbgsy

Androgen receptor/let-7a signaling regulates breast tumor-initiating cells

Wei Zhang, Xiaozhen Liu, Shan Liu, Ying Qin, Xiaoqi Tian, Fengting Niu, Han Liu, Ning Liu, Yun Niu
2017 OncoTarget  
Niu; 81602018 to W. Zhang) from the National Natural Science Foundation of China, grant 17JCYBJC27600 from Tianjin Municipal Science and Technology Commission to W. Zhang.  ... 
doi:10.18632/oncotarget.23196 pmid:29423076 pmcid:PMC5790493 fatcat:kzwr6p3lbveknpjibsx7ht3ale

Association between food allergy and ankylosing spondylitis

Qian Niu, Wei Wei, Zhuochun Huang, Junlong Zhang, Bin Yang, Lanlan Wang
2019 Medicine  
white/yolk À0.102 .593 Mushroom 0.067 .724 Cow's milk À0.128 .502 Pork 0.597 4.98E-04 Rice 0.241 .199 Shrimp 0.006 .974 Soybean 0.044 .817 Tomato 0.003 .895 Wheat 0.33 .075 Niu  ... 
doi:10.1097/md.0000000000014421 pmid:30732197 pmcid:PMC6380781 fatcat:5tmgshp3vbahpafgdcn4xvuxya

Determination of Instars of Bactrocera dorsalis (Diptera: Tephritidae)

Yan Shi, Lei Wang, Wei Dou, Hong-Bo Jiang, Dan-Dan Wei, Dong Wei, Jin-Zhi Niu, Jin-Jun Wang
2017 Florida Entomologist  
doi:10.1653/024.100.0222 fatcat:t7mfbdreg5e7bhfg77ubi3wd2q

Ginseng Is Useful to Enhance Cardiac Contractility in Animals

Jia-Wei Lin, Yih-Giun Cherng, Li-Jen Chen, Ho-Shan Niu, Chen Kuei Chang, Chiang-Shan Niu
2014 BioMed Research International  
Ginseng has been shown to be effective on cardiac dysfunction. Recent evidence has highlighted the mediation of peroxisome proliferator-activated receptors (PPARs) in cardiac function. Thus, we are interested to investigate the role of PPARδin ginseng-induced modification of cardiac contractility. The isolated hearts in Langendorff apparatus and hemodynamic analysis in catheterized rats were applied to measure the actions of ginsengex vivoandin vivo. In normal rats, ginseng enhanced cardiac
more » ... ractility and hemodynamicdP/dtmaxsignificantly. Both actions were diminished by GSK0660 at a dose enough to block PPARδ. However, ginseng failed to modify heart rate at the same dose, although it did produce a mild increase in blood pressure. Data of intracellular calcium level and Western blotting analysis showed that both the PPARδexpression and troponin I phosphorylation were raised by ginseng in neonatal rat cardiomyocyte. Thus, we suggest that ginseng could enhance cardiac contractility through increased PPARδexpression in cardiac cells.
doi:10.1155/2014/723084 pmid:24689053 pmcid:PMC3932289 fatcat:5o56mnu36vhydnmchbqnuprzci
« Previous Showing results 1 — 15 out of 13,724 results