Ocean University of China

About: Ocean University of China is a education organization based out in Qingdao, China. It is known for research contribution in the topics: Population & Sea surface temperature. The organization has 27604 authors who have published 27886 publications receiving 440181 citations. The organization is also known as: Zhōngguó Hǎiyáng Dàxué & OUC.

Effects of collagen and collagen hydrolysate from jellyfish (Rhopilema esculentum) on mice skin photoaging induced by UV irradiation.

Abstract: Collagen (JC) was extracted from jellyfish (Rhopilema esculentum) and hydrolyzed to prepare collagen hydrolysate (JCH). The protective effects of JC and JCH against UV-induced damages to mice skin were evaluated and compared in this article. JC and JCH could alleviate the UV-induced abnormal changes of antioxidative indicators, including the superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and catalase (CAT) activities and the contents of glutathione (GSH) and malondiaidehyde (MDA). JC and JCH could protect skin lipid and collagen from the UV radiation damages. Furthermore, the changes of total ceramide and glycosaminoglycan in skin were recovered significantly by JC and JCH. The action mechanisms mainly involved the antioxidative properties and the repairing to endogenous collagen synthesis of JC and JCH in vivo. JCH with the lower molecular weight showed much higher effects than JC. The results indicated that JCH was a novel antiphotoaging agent from natural resources.

Covariant light-front approach for B c transition form factors

Abstract: In the covariant light-front quark model, we investigate the form factors of ${B}_{c}$ decays into $D$, ${D}^{*}$, ${D}_{s}$, ${D}_{s}^{*}$, ${\ensuremath{\eta}}_{c}$, $J/\ensuremath{\psi}$, $B$, ${B}^{*}$, ${B}_{s}$, and ${B}_{s}^{*}$ mesons. The form factors in the spacelike region are directly evaluated. To extrapolate the form factors to the physical region, we fit the form factors by adopting a suitable three-parameter form. At the maximally recoiling point, $b\ensuremath{\rightarrow}u$, $d$, and $s$ transition form factors are smaller than $b\ensuremath{\rightarrow}c$ and $c\ensuremath{\rightarrow}d$, $s$ form factors, while the $b\ensuremath{\rightarrow}u$, $d$, $s$, and $c$ form factors at the zero-recoiling point are close to each other. In the fitting procedure, we find that parameters in ${A}_{2}^{{B}_{c}{B}^{*}}$ and ${A}_{2}^{{B}_{c}{B}_{s}^{*}}$ strongly depend on decay constants of ${B}^{*}$ and ${B}_{s}^{*}$ mesons. Fortunately, semileptonic and nonleptonic ${B}_{c}$ decays are not sensitive to these two form factors. We also investigate branching fractions, polarizations of the semileptonic ${B}_{c}$ decays. ${B}_{c}\ensuremath{\rightarrow}({\ensuremath{\eta}}_{c},J/\ensuremath{\psi})l\ensuremath{ u}$ and ${B}_{c}\ensuremath{\rightarrow}({B}_{s},{B}_{s}^{*})l\ensuremath{ u}$ decays have much larger branching fractions than ${B}_{c}\ensuremath{\rightarrow}(D,{D}^{*},B,{B}^{*})l\ensuremath{ u}$. For the three kinds of ${B}_{c}\ensuremath{\rightarrow}Vl\ensuremath{ u}$ decays, longitudinal contributions are comparable with the transverse contributions. These predictions will be tested on the ongoing and forthcoming hadron colliders.

An overview of ocean renewable energy in China

Abstract: Facing great pressure of economic growth and energy crisis, China pays much attention to the renewable energy. An overview of policy and legislation of renewable energy as well as status of development of renewable energy in China was given in this article. By analysis, the authors believe that ocean energy is a necessary addition to existent renewable energy to meet the energy demand of the areas and islands where traditional forms of energy are not applicable and it is of great importance in adjusting energy structure of China. In the article, resources distribution and technology status of tidal energy, wave energy, marine current energy, ocean thermal energy and salinity gradient energy in China was reviewed, and assessment and advices were given for each category. Some suggestions for future development of ocean energy were also given.

Impact of Ural Blocking on Winter Warm Arctic–Cold Eurasian Anomalies. Part II: The Link to the North Atlantic Oscillation

Abstract: In Part I of this study, the Ural blocking (UB)-induced amplification role of winter warm Arctic–cold Eurasian (WACE) anomalies has been examined. It was found that the long-lived UB together with the positive North Atlantic Oscillation (NAO+) significantly contributes to the amplification of the WACE pattern. The present study examines how the UB variability affects quasi-biweekly WACE (QB-WACE) anomalies and depends on the NAO+ and North Atlantic conditions by classifying the UB based on a case study of a cold event that occurred over southern China in January 2008. A composite analysis during 1979–2013 shows that the QB-WACE anomalies associated with the UB that often occur with the NAO+ are strong and influenced by the North Atlantic jet (NAJ) and zonal wind strengths over Eurasia. For NAO+-related UB, the QB-WACE anomaly depends strongly on the location of UB, and the UB anomalies lag the NAO+ by approximately 4–7 days.The strength of the NAJ determines whether the combined NAO+ and UB anomal...

Palaeoproterozoic tectonothermal evolution and deep crustal processes in the Jiao-Liao-Ji Belt, North China Craton: A review

Abstract: The Palaeoproterozoic Jiao-Liao-Ji Belt is located in the eastern margin of the Eastern Block of the North China Craton In this paper, we synthesize the tectonothermal evolution and deep crustal processes in the Jiao-Liao-Ji Belt based on recent information A mantle plume-related underplating from 253 to 236 Ga is envisaged which led to the emplacement of the 247–233 Ga alkali granite plutons and mafic dyke swarms, followed by the development of the Jiao-Liao-Ji Rift and bi-modal volcanism The underplating resulted not only in different sedimentary environments in the upper crust, but also in a differentiation of the initial thermal structure in the rift This controlled the metamorphism and style of P-T-t paths in the different parts of the rift Subsequent underplating resulted in the emplacement of the A-type Liaoji granites of ca 217 Ga in the lower crust, and the formation of associated pegmatites of 22 and 20 Ga, together with the development of a bedding-parallel extension However, the main orogeny occurred between 193 and 188 Ga with closing of the rift, compressional deformation and high-pressure granulite metamorphism in the southern part of the orogen Subsequently, lithospheric blocks were possibly delaminated at ∼185 Ga; anorogenic magmatic rocks such as rapakivi granite, alkaline granites and syenite were intruded, and pegmatite veins and mafic dyke swarms were emplaced cross-cutting all the earlier structural traces We identify that the underplating styles, collision processes and delamination types in the deep lithosphere controlled the tectonothermal evolution of the crust in the Jiao-Liao-Ji region Copyright © 2011 John Wiley & Sons, Ltd