Showing papers by "Ocean University of China published in 2010"
TL;DR: The paper reviews the current trend of investigation on antimicrobial activities of chitosan and its mode of action and different physical states are comparatively discussed.
2,260 citations
TL;DR: It was found that PMS could be activated by some anions, but PS and H( 2)O(2) cannot, and the activation efficiencies of PMS are remarkable, whereas remarkable by HCO(3)(-), HPO(4)(2-), Cl(-) and CO(3)2-).
831 citations
TL;DR: A brief review of the current understanding of the IGF signaling system is provided and recent findings on how local oxygen availability and IGFBPs act to specify IGF actions in muscle cells are discussed.
429 citations
TL;DR: The results showed a significant increase of interlayer spacing, BET surface area and total pore volume which were all beneficial to phosphate adsorption, indicating an anion/OH(-) exchange reaction.
316 citations
TL;DR: In the case of the Yellow River basin, the Xiaolangdi Reservoir has been used to increase the grain size of suspended sediment delivered to the sea by ∼90% in the last 60 years as discussed by the authors.
270 citations
TL;DR: A facile approach for imprinting protein based on self-polymerization of dopamine in the presence of template protein on the Fe3O4 nanoparticles (NPs) surface shows high binding capacity and acceptable specific recognition behavior towards template proteins.
Abstract: In this work, we report a facile approach for imprinting protein based on self-polymerization of dopamine in the presence of template protein on the Fe3O4 nanoparticles (NPs) surface. Dopamine, commonly known as a neurotransmitter, is also a small-molecule mimic of the adhesive proteins of mussels. Self-polymerization of dopamine can produce a thin polydopamine (PDA) layer on Fe3O4 NPs surface. During the self-polymerization of dopamine, some template protein molecules were embedded in the PDA layer. After the removal of these embedded protein molecules, the protein imprinted sites are created. The prepared imprinted Fe3O4@PDA NPs shows high binding capacity and acceptable specific recognition behavior towards template proteins.
258 citations
TL;DR: The paper reviews the category, source, purification method, major characteristics, and application fields of these native and gene cloned agarases in the past, present, and future.
Abstract: Agarases are the enzymes which catalyze the hydrolysis of agar. They are classified into α-agarase (E.C. 3.2.1.158) and β-agarase (E.C. 3.2.1.81) according to the cleavage pattern. Several agarases have been isolated from different genera of bacteria found in seawater and marine sediments, as well as engineered microorganisms. Agarases have wide applications in food industry, cosmetics, and medical fields because they produce oligosaccharides with remarkable activities. They are also used as a tool enzyme for biological, physiological, and cytological studies. The paper reviews the category, source, purification method, major characteristics, and application fields of these native and gene cloned agarases in the past, present, and future.
249 citations
TL;DR: Using a novel index (Floating Algae Index) and multiresolution remote sensing data from MODIS and Landsat, Wang et al. as mentioned in this paper showed that Ulva prolifera patches appeared nearly every year between April and July 2000-2009 in the YS and/or East China Sea (ECS), which all originated from the nearshore Subei Bank.
Abstract: [1] A massive bloom of the green macroalgae Ulva prolifera (previously known as Enteromorpha prolifera) occurred in June 2008 in the Yellow Sea (YS), resulting in perhaps the largest “green tide” event in history. Using a novel index (Floating Algae Index) and multiresolution remote sensing data from MODIS and Landsat, we show that U. prolifera patches appeared nearly every year between April and July 2000–2009 in the YS and/or East China Sea (ECS), which all originated from the nearshore Subei Bank. A finite volume numerical circulation model, driven by realistic forcing and boundary conditions, confirmed this finding. Analysis of meteorological/environmental data and information related to local aquaculture activities strongly supports the hypothesis that the recurrent U. prolifera in the YS and ECS resulted from aquaculture of the seaweed Porphyra yezoensis (or nori) conducted along the 200 km shoreline of the Subei Bank north of the Changjiang (Yangtze) River mouth. Given the continuous growth in aquaculture efforts in the region, similar macroalgae bloom events, such as the summer 2008 event, are likely to occur in the future, particularly between May and July. This was confirmed by the 2009 bloom event in the same regions and the same period. The profit of the local P. yezoensis aquaculture industry (∼16,000 Ha in 2007) is estimated as U.S. $53 million, yet the cost to manage the impact of the summer 2008 U. prolifera bloom exceeded U.S. $100 million. Therefore, better strategies are required to balance the economic benefit of seaweed aquaculture and the costs of environmental impacts.
246 citations
TL;DR: In this article, the authors investigated the influence of the El Nino-Southern Oscillation (ENSO) on the subtropical northwest (NW) Pacific climate and showed that interdecadal change in this influence is due to changes in the tropical Indian Ocean response to ENSO.
Abstract: El Nino’s influence on the subtropical northwest (NW) Pacific climate increased after the climate regime shift of the 1970s. This is manifested in well-organized atmospheric anomalies of suppressed convection and a surface anticyclone during the summer (June–August) of the El Nino decay year [JJA(1)], a season when equatorial Pacific sea surface temperature (SST) anomalies have dissipated. In situ observations and ocean–atmospheric reanalyses are used to investigate mechanisms for the interdecadal change. During JJA(1), the influence of the El Nino–Southern Oscillation (ENSO) on the NW Pacific is indirect, being mediated by SST conditions over the tropical Indian Ocean (TIO). The results here show that interdecadal change in this influence is due to changes in the TIO response to ENSO. During the postregime shift epoch, the El Nino teleconnection excites downwelling Rossby waves in the south TIO by anticyclonic wind curls. These Rossby waves propagate slowly westward, causing persistent SST warmi...
238 citations
TL;DR: Morphological and phylogenetic analysis demonstrated the homology of Ulva prolifera in the 2008 green-tide with the U. prolifera from P. yezoensis aquaculture rafts which was sufficient to seed a bloom when they are dislodged from the rafts as a result of harvesting practices.
226 citations
TL;DR: Results suggested that chitosan and oligochitOSan triggered different mechanism for pathogenicity inhibition and disease control.
TL;DR: Comparison of sorption coefficients at different pHs indicates that hydrophobic and electrostatic interaction also played major roles in sorption of NOR on CNTs, which needs to be considered for predicting environmental risks of C NTs and NOR.
Abstract: Adsorption on carbon nanotubes (CNTs) may affect the environmental behavior of organic contaminants including antibiotics. In this study, sorption of norfloxacin (NOR) onto graphitized multiwall CNTs (G−CNTs), carboxylated multiwall CNTs (C−CNTs), hydroxylated multiwall CNTs (H−CNTs), and activated carbon (AC) was investigated. All sorption isotherms were highly nonlinear and were fitted well by Freundlich and Polanyi−Manes models. AC showed the highest NOR sorption capacity because of its highest surface area. H−CNTs had much higher NOR sorption than C−CNTs, and the π−π electron donor−acceptor (EDA) interactions could explain the distinction between the two types of CNTs. Comparison of sorption coefficients at different pHs indicates that hydrophobic and electrostatic interaction also played major roles in sorption of NOR on CNTs. Furthermore, high sorption capacity and hysteresis of NOR on CNTs were demonstrated in this study, which needs to be considered for predicting environmental risks of CNTs and N...
TL;DR: In this paper, physicochemical and biological parameters in order to assess their effectiveness as stability and maturity indicators during the forced-aeration composting process of chicken manure mixed with different amounts of sawdust, yielding initial C/N ratios of 12, 18 and 28.
TL;DR: Inspired by the bio-adhesion principle, polydopamine membrane was fabricated by dipping the 304 Stainless Steel (304 SS) substrate into an aqueous alkaline dopamine solution and its possible reaction mechanism and the temperature effect were studied as discussed by the authors.
TL;DR: It is shown that GlcNAcylation enhances the migration/invasion of breast cancer cells in vitro and lung metastasis in vivo and suggests that it might be a potential target for the diagnosis and therapy of Breast cancer.
Abstract: GlcNAcylation, a dynamic posttranslational modification, is involved in a wide range of biological processes and some human diseases. Although there is emerging evidence that some tumor-associated proteins are modified by GlcNAcylation, the role of GlcNAcylation in tumor progression remains unclear. Here, we show that GlcNAcylation enhances the migration/invasion of breast cancer cells in vitro and lung metastasis in vivo. The decrease of cell surface E-cadherin is the molecular mechanism underlying GlcNAcylation-induced breast cancer metastasis. p120 and beta-catenin, but not E-cadherin, are GlcNAcylated; the GlcNAcylation of p120 and beta-catenin might play roles in the decrease of cell surface E-cadherin. Moreover, immunohistochemistry analysis indicated that the global GlcNAcylation level in breast tumor tissues is elevated significantly as compared with that in the corresponding adjacent tissues; further, GlcNAcylation was significantly enhanced in metastatic lymph nodes compared with their corresponding primary tumor tissues. This is the first report to clearly elucidate the roles and mechanisms whereby GlcNAcylation influences the malignant properties of breast cancer cells. These results also suggest that GlcNAcylation might be a potential target for the diagnosis and therapy of breast cancer.
TL;DR: Dietary B. subtilis and FOS had a synergistic effect on enhancing immunity and disease resistance of sea cucumber (P < 0.05) and the SGR, PO activity, total viable bacterial counts, and Vibrio counts were significantly affected by dietary FOS.
TL;DR: The photocatalytic properties of ZnO/Cu(2)O compound were improved greatly and some compounds were better than pure Cu( 2)O.
TL;DR: Application of the present glycosylation protocol in the efficient synthesis of a cyclic triterpene tetrasaccharide have further demonstrated the versatility and efficacy of this new method, in that a novel chemoselective glyCosylation of the carboxylic acid and a new one-pot sequential glycosYLation sequence have been implemented.
Abstract: Glycosyl ortho-alkynylben- zoates have emerged as a new genera- tion of donors for glycosidation under the catalysis of gold(I) complexes such as Ph3PAuOTf and Ph3PAuNTf2 (Tf = trifluoromethanesulfonate). A wide va- riety of these donors, including 2-deoxy sugar and sialyl donors, are easily pre- pared and shelf stable. The glycosidic coupling yields with alcohols are gener- ally excellent; even direct coupling with the poorly nucleophilic amides gives satisfactory yields. Moreover, ex- cellent a-selective glycosylation with a 2-deoxy sugar donor and b-selective sialylation have been realized. Applica- tion of the present glycosylation proto- col in the efficient synthesis of a cyclic triterpene tetrasaccharide have further demonstrated the versatility and effica- cy of this new method, in that a novel chemoselective glycosylation of the car- boxylic acid and a new one-pot sequen- tial glycosylation sequence have been implemented.
Seoul National University1, Swedish University of Agricultural Sciences2, University of California, Davis3, Cardiff University4, University of Burgundy5, Chinese Academy of Fishery Sciences6, Alaska Department of Fish and Game7, Nanjing Normal University8, Second Military Medical University9, Field Museum of Natural History10, Queen's University11, Spanish National Research Council12, University of Agricultural Sciences, Bangalore13, Vanderbilt University14, Uppsala University15, National Oceanic and Atmospheric Administration16, University of Windsor17, University of Ljubljana18, National Fisheries Research & Development Institute19, United States Department of Agriculture20, University of Southern Mississippi21, Ewha Womans University22, University of California, Berkeley23, Xiamen University24, University of Zagreb25, Shanghai Ocean University26, ETH Zurich27, California State University, Sacramento28, Clemson University29, National Research Council30, Tulane University31, Ocean University of China32
TL;DR: The addition of 411 microsatellite marker loci and 15 pairs of Single Nucleotide Polymorphism (SNP) sequencing primers to the Molecular Ecology Resources Database are documents.
Abstract: This article documents the addition of 411 microsatellite marker loci and 15 pairs of Single Nucleotide Polymorphism (SNP) sequencing primers to the Molecular Ecology Resources Database. Loci were developed for the following species: Acanthopagrus schlegeli, Anopheles lesteri, Aspergillus clavatus, Aspergillus flavus, Aspergillus fumigatus, Aspergillus oryzae, Aspergillus terreus, Branchiostoma japonicum, Branchiostoma belcheri, Colias behrii, Coryphopterus personatus, Cynogolssus semilaevis, Cynoglossus semilaevis, Dendrobium officinale, Dendrobium officinale, Dysoxylum malabaricum, Metrioptera roeselii, Myrmeciza exsul, Ochotona thibetana, Neosartorya fischeri, Nothofagus pumilio, Onychodactylus fischeri, Phoenicopterus roseus, Salvia officinalis L., Scylla paramamosain, Silene latifo, Sula sula, and Vulpes vulpes. These loci were cross-tested on the following species: Aspergillus giganteus, Colias pelidne, Colias interior, Colias meadii, Colias eurytheme, Coryphopterus lipernes, Coryphopterus glaucofrenum, Coryphopterus eidolon, Gnatholepis thompsoni, Elacatinus evelynae, Dendrobium loddigesii Dendrobium devonianum, Dysoxylum binectariferum, Nothofagus antarctica, Nothofagus dombeyii, Nothofagus nervosa, Nothofagus obliqua, Sula nebouxii, and Sula variegata. This article also documents the addition of 39 sequencing primer pairs and 15 allele specific primers or probes for Paralithodes camtschaticus.
TL;DR: The Hengshan-Wutai-Fuping Complexes of the Trans-North China Orogen have been studied in this paper, showing that most of the rocks in these complexes underwent three distinct episodes of folding (D 1 to D 3 ) and two stages of ductile thrust shearing (STZ 1 between D 1 and D 2 and STZ 2 after D 3 ).
TL;DR: In this paper, a super-hydrophobic surface was fabricated on pure Mg surface by chemical etching in H(2)SO(4), H( 2)O(2), and subsequent immersion in stearic acid (CH(3)(CH(2))(16)COOH) ethanol solution.
TL;DR: The composting of chicken manure and sawdust has been investigated in forced-aeration composting systems at aeration rates of 0.3, 0.5, and 0.7 l min (-1)kg(-1) organic matter (OM), corresponding to pile A, pile B, and pile C.
TL;DR: This work is the first report of a direct link between a sedimentological parameter and the composition and distribution of the sediment Beta-AOB and indicates the potential for using the Beta- AOB community composition and individual isolates or environmental clones in the Nitrosomonas oligotropha lineage in particular as bioindicators and biotracers of pollution or freshwater or wastewater input in coastal environments.
Abstract: Ongoing anthropogenic eutrophication of Jiaozhou Bay offers an opportunity to study the influence of human activity on bacterial communities that drive biogeochemical cycling. Nitrification in coastal waters appears to be a sensitive indicator of environmental change, suggesting that function and structure of the microbial nitrifying community may be associated closely with environmental conditions. In the current study, the amoA gene was used to unravel the relationship between sediment aerobic obligate ammonia-oxidizing Betaproteobacteria (Beta-AOB) and their environment in Jiaozhou Bay. Protein sequences deduced from amoA gene sequences grouped within four distinct clusters in the Nitrosomonas lineage, including a putative new cluster. In addition, AmoA sequences belonging to three newly defined clusters in the Nitrosospira lineage were also identified. Multivariate statistical analyses indicated that the studied Beta-AOB community structures correlated with environmental parameters, of which nitrite-N and sediment sand content had significant impact on the composition, structure, and distribution of the Beta-AOB community. Both amoA clone library and quantitative PCR (qPCR) analyses indicated that continental input from the nearby wastewater treatment plants and polluted rivers may have significant impact on the composition and abundance of the sediment Beta-AOB assemblages in Jiaozhou Bay. Our work is the first report of a direct link between a sedimentological parameter and the composition and distribution of the sediment Beta-AOB and indicates the potential for using the Beta-AOB community composition in general and individual isolates or environmental clones in the Nitrosomonas oligotropha lineage in particular as bioindicators and biotracers of pollution or freshwater or wastewater input in coastal environments.
TL;DR: Hydroxytyrosol in extra-virgin olive oil is investigated to suggest that HT is able to promote mitochondrial function by stimulating mitochondrial biogenesis, and mechanistic study of the PPARGC1 alpha activation signaling pathway demonstrated thatHT is an activator of 5'AMP-activated protein kinase and also up-regulates gene expression of PPAR alpha, CPT-1 and PPAR gamma.
Abstract: Hydroxytyrosol (HT) in extra-virgin olive oil is considered one of the most important polyphenolic compounds responsible for the health benefits of the Mediterranean diet for lowering incidence of cardiovascular disease, the most common and most serious complication of diabetes. We propose that HT may prevent these diseases by a stimulation of mitochondrial biogenesis that leads to enhancement of mitochondrial function and cellular defense systems. In the present study, we investigated effects of HT that stimulate mitochondrial biogenesis and promote mitochondrial function in 3T3-L1 adipocytes. HT over the concentration range of 0.1–10 μmol/L stimulated the promoter transcriptional activation and protein expression of peroxisome proliferator-activated receptor (PPAR) coactivator 1 alpha (PPARGC1α, the central factor for mitochondrial biogenesis) and its downstream targets; these included nuclear respiration factors 1 and 2 and mitochondrial transcription factor A, which leads to an increase in mitochondrial DNA (mtDNA) and in the number of mitochondria. Knockdown of Ppargc1α by siRNA blocked HT's stimulating effect on Complex I expression and mtDNA copy number. The HT treatment resulted in an enhancement of mitochondrial function, including an increase in activity and protein expression of Mitochondrial Complexes I, II, III and V; increased oxygen consumption; and a decrease in free fatty acid contents in the adipocytes. The mechanistic study of the PPARGC1α activation signaling pathway demonstrated that HT is an activator of 5′AMP-activated protein kinase and also up-regulates gene expression of PPARα, CPT-1 and PPARγ. These data suggest that HT is able to promote mitochondrial function by stimulating mitochondrial biogenesis.
TL;DR: Rhodotorula mucilaginosa TJY15a which was isolated from surface of marine fish could accumulate a large amount of lipid from hydrolysate of cassava starch, suggesting that the fatty acids could be used as feedstock for biodiesel production.
Abstract: Rhodotorula mucilaginosa TJY15a which was isolated from surface of marine fish could accumulate a large amount of lipid from hydrolysate of cassava starch. The cells contained 47.9% (w/w) oil during batch cultivation, whereas 52.9% (w/w) of lipid was obtained during the fed-batch cultivation. At the end of the fed-batch cultivation, all the starch were converted into reducing sugar and only 0.34 g dm−3 of reducing sugar was left in the fermented medium. Therefore, the marine-derived R. mucilaginosa TJY15a was another candidate for single cell oil production. The fatty acids from R. mucilaginosa TJY15a were mainly composed of palmitic acid (C16:0), palmitoleic acid (C16:1), stearic acid (C18:0), oleic acid (C18:1) and linolenic acid (C18:2), suggesting that the fatty acids could be used as feedstock for biodiesel production.
TL;DR: LiFePO4/graphene (92:8 wt.) composites exhibited a discharge capacity of 160.3 mAh g(-1) at 0.1 C and 81.5 mAhg(-1), respectively as mentioned in this paper.
TL;DR: In this article, the spatial distribution of aerosols over 86 Chinese cities was reconstructed from air pollution index (API) records for summer 2000 to winter 2006, these accounted for 91.6% of the total 150 428 recorded days.
Abstract: . The spatial distribution of the aerosols over 86 Chinese cities was reconstructed from air pollution index (API) records for summer 2000 to winter 2006. PM10 (particulate matter ≤10 μm) mass concentrations were calculated for days when PM10 was the principal pollutant, these accounted for 91.6% of the total 150 428 recorded days. The 83 cities in mid-eastern China (100° E to 130° E) were separated into three latitudinal zones using natural landscape features as boundaries. Areas with high PM10 level in northern China (127 to 192 μg m−3) included Urumchi, Lanzhou-Xining, Weinan-Xi'an, Taiyuan-Datong-Yangquan-Changzhi, Pingdingshan-Kaifeng, Beijing-Tianjin-Shijiazhuang, Jinan, and Shenyang-Anshan-Fushun; in the middle zone, high PM10 (119–147 μg m−3) occurred at Chongqing-Chengdu-Luzhou, Changsha-Wuhan, and Nanjing-Hangzhou; in the southern zone, only four cities (Qujing, Guiyang, Guangzhou and Shaoguan) showed PM10 concentration >80 μg m−3. The median PM10 concentration decreased from 108 μg m−3 for the northern cities to 95 μg m−3 and 55 μg m−3 for the middle and southern zones, respectively. PM10 concentration and the APIs both exhibited wintertime maxima, summertime minima, and the second highest values in spring. PM10showed evidence for a decreasing trend for the northern cities while in the other zones urban PM10 levels fluctuated, but showed no obvious change over time. The spatial distribution of PM10 was compared with the emissions, and the relationship between the surface PM10 concentration and the aerosol optical depth (AOD) was also discussed.
TL;DR: A 35.60m-long core (ECS-0702) recovered from a water depth of 22m in the muddy area off the Yangtze River estuary was analyzed for sedimentary characteristics, clay and detrital mineral components, and element geochemistry as well as by AMS 14 C dating.
TL;DR: Results of the present study indicated that protein from CM could substitute less than 20% for fish meal protein without influencing the growth, survival, digestion and serum lysozyme of Japanese seabass.
TL;DR: ZnO powders with different Co2+ doping concentrations (0, 05, 1, 3, 3 and 5 ) were prepared by the hydrothermal method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-vis diffuse reflectance spectrometer, and photochemical reaction instrument as discussed by the authors.