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  • 1
    Article
    Article
    Phosphorus cycling in the North and South Atlantic Ocean subtropical gyres (2008)
    Associated volumes
    Details Availability
    In: Nature geoscience, London : Nature Publishing Group, 2008, 1(2008), Seite 439-443, 1752-0894
    In: volume:1
    In: year:2008
    In: pages:439-443
    Description / Table of Contents: Despite similar physical properties, the Northern and Southern Atlantic subtropical gyres have different biogeochemical regimes. The Northern subtropical gyre, which is subject to iron deposition from Saharan dust 1, is depleted in the nutrient phosphate, possibly as a result of iron-enhanced nitrogen fixation 2. Although phosphate depleted, rates of carbon fixation in the euphotic zone of the North Atlantic subtropical gyre are comparable to those of the South Atlantic subtropical gyre 3, which is not phosphate limited. Here we use the activity of the phosphorus-specific enzyme alkaline phosphatase to show potentially enhanced utilization of dissolved organic phosphorus occurring over much of the North Atlantic subtropical gyre. We find that during the boreal spring up to 30% of primary production in the North Atlantic gyre is supported by dissolved organic phosphorus. Our diagnostics and composite map of the surface distribution of dissolved organic phosphorus in the subtropical Atlantic Ocean reveal shorter residence times in the North Atlantic gyre than the South Atlantic gyre. We interpret the asymmetry of dissolved organic phosphorus cycling in the two gyres as a consequence of enhanced nitrogen fixation in the North Atlantic Ocean 4, which forces the system towards phosphorus limitation. We suggest that dissolved organic phosphorus utilization may contribute to primary production in other phosphorus-limited ocean settings as well.
    Type of Medium: Article
    Pages: graph. Darst
    ISSN: 1752-0894
    Language: English
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  • 2
    Online Resource
    Online Resource
    Traditional Chinese Villages : Beautiful Nostalgia (2021)
    Singapore : Springer Singapore | Singapore : Imprint: Springer
    Details Availability
    Keywords: Human geography. ; Architecture. ; Cultural heritage. ; Cultural geography.
    Description / Table of Contents: Introduction: Diverse Cultures, Villages and Architecture -- Happy Families in Heavenly Dwellings, Huizhou Merchant Villages in Southern Anhui -- Lofty Buildings Towering East and West, Kaiping Watchtower Villages in Central and Southern Guangdong -- Round and Square Buildings and Five-phoenix Mansions, Ancient Villages in Southwestern Fujian -- Drum Towers against Mountains and over Waters, Ancient Dong Villages in Southeastern Guizhou -- Stilt Houses on Top of Leigong Mountain, Ancient Miao Villages in Southeastern Guizhou -- Watchtowers over Gorges, Qiang and Tibetan Villages in Western Sichuan -- Deep Merchant Courtyards, Traditional Villages in Central Shanxi -- Dwellings for All Walks of Life, Villages on Middle Reaches of Qinhe River in Shanxi and Henan -- Hakka Weilong Houses among Green Mountains and Waters, Traditional Meizhou Villages in Guangdong -- Fresh and Diverse Local Life, Ancient Naxi Villages in Yunnan. .
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource(X, 310 p. 535 illus., 460 illus. in color.)
    Edition: 1st ed. 2021.
    ISBN: 9789813361546
    URL: https://doi.org/10.1007/978-981-33-6154-6
    URL: https://swbplus.bsz-bw.de/bsz1760109916cov.jpg
    DOI: 10.1007/978-981-33-6154-6
    Language: English
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  • 3
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    Abundance and calculated biomass of large-scale distribution from Atlantic nitrogen fixation controlled by iron availability (2013)
    PANGAEA
    Details
    Publication Date: 2023-07-08
    Keywords: AMT17/03; AMT17/04; AMT17/05; AMT17/06; AMT17/08; AMT17/10; Atlantic; Calculated after Luo et al. (2012); DEPTH, water; Diazotrophs, total biomass as carbon; Event label; Iron; Latitude of event; Light microscope; Longitude of event; MAREDAT_Diazotrophs_Collection; Nitrate; Phosphate; Salinity; Temperature, water; Trichodesmium, biomass as carbon; Trichodesmium, carbon per trichome; Trichodesmium abundance, free trichomes; Trichodesmium abundance, total
    Type: Dataset
    Format: text/tab-separated-values, 55 data points
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  • 4
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    Nitrogen fixation rate of large-scale distribution from Atlantic nitrogen fixation controlled by iron availability (2013)
    PANGAEA
    Details
    Publication Date: 2023-07-08
    Keywords: AMT17/01; AMT17/02; AMT17/03; AMT17/04; AMT17/05; AMT17/06; AMT17/07; AMT17/08; AMT17/09; AMT17/10; Atlantic; Calculated after Luo et al. (2012); Date/Time of event; DEPTH, water; Event label; Iron; Latitude of event; Longitude of event; MAREDAT_Diazotrophs_Collection; Nitrate; Nitrogen Fixation (C2H2 Reduction); Nitrogen fixation rate, total; Nitrogen fixation rate, whole seawater; Phosphate; Salinity; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 275 data points
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    DATA PANGAEA
  • 5
    Electronic Resource
    Electronic Resource
    Rapid selection of complement-inhibiting protein variants in group A Streptococcus epidemic waves (1999)
    [s.l.] : Nature America Inc.
    Nature medicine 5 (1999), S. 924-929 
    Details
    ISSN: 1546-170X
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Serotype M1 group A Streptococcus strains cause epidemic waves of human infections long thought to be mono- or pauciclonal. The gene encoding an extracellular group A Streptococcus protein (streptococcal inhibitor of complement) that inhibits human complement was sequenced in 1,132 M1 strains ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/11369
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    Paper (German National Licenses)
    Fulltext
  • 6
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    Dissolved organic carbon and apparent oxygen utilization in the Atlantic Ocean (2014)
    Elsevier
    In:  Deep Sea Research Part I: Oceanographic Research Papers, 85 . pp. 80-87.
    Details
    Publication Date: 2021-04-23
    Description: Highlights • Meridional pattern in surface DOC in Atlantic Ocean. • POC mineralization determines AOU in equatorial Atlantic. • DOC utilization determines AOU in Atlantic subtropical gyres. Abstract Dissolved organic carbon (DOC) distributions along two Atlantic Meridional Transects conducted in 2005 in the region between 47°N and 34°S showed clear latitudinal patterns. The DOC concentrations in the epipelagic zone (0–100 m) were the highest (70–90 µM) in tropical and subtropical waters with stable mixed layers, and lowest (50–55 µM) at the poleward extremities of the transects due to deep convective mixing supplying low DOC waters to the surface. A decrease in DOC occurred with depth, and lowest DOC concentrations (41–45 µM) in the 100–300 m depth range were observed in the equatorial region due to upwelling of low DOC waters. A strong relationship between DOC and AOU was observed in the σ–t 26–26.5 isopycnal layer which underlies the euphotic zone and outcrops at the poleward extremities of the North and South Atlantic Subtropical Gyres (NASG and SASG) in the region ventilating the thermocline waters. Our observations reveal significant north–south variability in the DOC–AOU relationship. The gradient of the relationship suggests that 52% of the AOU in the σ–t 26–26.5 density range was driven by DOC degradation in the NASG and 36% in the SASG, with the remainder due to the remineralisation of sinking particulate material. We assess possible causes for the greater contribution of DOC remineralisation in the NASG compared to the SASG.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.dsr.2013.12.003
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 7
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    The survival and the long-term trends of patients with gastric cancer in Shanghai, China (2014)
    BioMed Central
    Details
    Publication Date: 2014-04-30
    Description: Background: Gastric cancer remains a major health issue and a leading cause of death worldwide. This study presented a long-term survival data of gastric cancer registered in Shanghai of China from 1972-2003, with aims to describe the trends as well as the age, sex, stage and tumor sites specific characteristics. Methods: The main source of information on cancer cases was the notification card sending to the registry. The residential status of cancer cases was confirmed by home-visits. The methods of follow-up have been a mixture of both active and passive ones. Results: We observed an increased trend of survival probability during the last decades. Patients diagnosed during 1972-1976 had a 5-years relative survival rate at 12% for males and 11% for females, respectively, which had dramatically increased to 30% for male and 32% for female patients respectively during the period of 2002-2003. Among the patients diagnosed in 2002-2003, the overall survival probability declined with patient's age at the time of diagnosis. The lowest survival rate was observed among the oldest group, with the median survival time of 0.8 years. Patients diagnosed with stage I had a higher relative survival rate. Patients with cardia cancer had the worst prognosis, with the 5-year relative survival rate of 29%. Conclusions: The survival probability of patients with gastric cancer in Shanghai has improved significantly during the last decades. Age, stage and site of tumor have an impact on prognosis.
    Electronic ISSN: 1471-2407
    Topics: Medicine
    Published by BioMed Central
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  • 8
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    Distance-Based Routing Strategy for Traffic Transport in Spatial Networks (2013)
    Hindawi
    Details
    Publication Date: 2013-10-30
    Description: It is well known that routing strategies based on global topological information is not a good choice for the enhancement of traffic throughput in large-scale networks due to the heavy communication cost. On the contrary, acquiring spatial information, such as spatial distances among nodes, is more feasible. In this paper, we propose a novel distance-based routing strategy in spatial scale-free networks, called LDistance strategy. The probability of establishing links among nodes obeys the power-law in the spatial network under study. Compared with the LDegree strategy (Wang et al., 2006) and the mixed strategy (a strategy combining both greedy routing strategy and random routing strategy), results show that our proposed LDistance strategy can further enhance traffic capacity. Besides, the LDistance strategy can also achieve a much shorter delivering time than the LDegree strategy. Analyses reveal that the superiority of our strategy is mainly due to the interdependent relationship between topological and spatial characteristics in spatial scale-free networks. Furthermore, along transporting path in the LDistance strategy, the spatial distance to destination decays more rapidly, and the degrees of routers are higher than those in the LDegree strategy.
    Print ISSN: 1687-9120
    Electronic ISSN: 1687-9139
    Topics: Mathematics , Physics
    Published by Hindawi
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  • 9
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    High-Performance Pyrochlore-Type Yttrium Ruthenate Electrocatalyst for Oxygen Evolution Reaction in Acidic Media (2017)
    American Chemical Society (ACS)
    Details
    Publication Date: 2017-08-19
    Description: Journal of the American Chemical Society DOI: 10.1021/jacs.7b06808
    Print ISSN: 0002-7863
    Electronic ISSN: 1520-5126
    Topics: Chemistry and Pharmacology
    Published by American Chemical Society (ACS)
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  • 10
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    Effect of Dual Fuel Nozzle Structures on Combustion Flow Field in CRGT Combustor (2013)
    Hindawi
    Details
    Publication Date: 2013-11-13
    Description: Three different structures of a new dual fuel nozzle design concept (inner swirl nozzle, double swirl nozzle, and outer swirl nozzle) were developed for the chemically recuperated gas turbine (CRGT) combustor. The combustion flow fields in the combustor with the three nozzles were investigated, respectively, based on the FLUENT simulation. The realizable - model and PDF model were adopted, respectively, for the turbulence flow and nonpremixed reformed gas combustion. The obtained results using these models showed good agreement with experimental results in original oil combustor. The effects of different dual fuel nozzle structures on the flow field, fuel concentration distribution, and temperature distribution in the combustor were simulated and analyzed. Results suggest that the double swirl nozzle and outer swirl nozzle can form a better flow field with obvious central recirculation zone (CRZ), shorten fuel and air mixing distance, and obtain a more uniform outlet temperature distribution, in comparison with the inner swirl nozzle. However, compared with double swirl nozzle, the outer swirl nozzle can result in a better combustion flow field with the high temperature region in the CRZ, which is important to stabilize the flame.
    Print ISSN: 1024-123X
    Electronic ISSN: 1563-5147
    Topics: Mathematics , Technology
    Published by Hindawi
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