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Nutrient Cycles and Marine Microbes in a CO2-Enriched Ocean
Ocean carbon cycle element carbon dioxide ocean acidification Marine nutrient biogeochemical microorganisms
2015/7/6
The ocean carbon cycle is tightly linked with the cycles of the major nutrient elements nitrogen, phosphorus, and silicon. It is therefore likely that enrichment of the ocean with anthropogenic CO2 an...
Ocean Acidification in Deep Time
The earth history carbon dioxide from burning fossil fuels carbon dioxide calcium carbonate limestone supersaturated seawater
2015/7/6
Is there precedence in Earth history for the rapid release of carbon dioxide (CO2) by fossil fuel burning and its environmental consequences? Proxy evidence indicates that atmospheric CO2 concentratio...
Ocean Acidification and the Increasing Transparency of the Ocean to Low-Frequency Sound
Ocean acid boric acid to dissolve carbonate ions sound waves Marine mammals
2015/7/6
As the ocean becomes more acidic, low-frequency (~ 1–3 kHz and below) sound travels much farther due to changes in the amounts of pH-dependent species such as dissolved borate and carbonate ions, whic...
Effect of Ocean Acidification on the Speciation of Metals in Seawater
Air carbon dioxide water pH value water calcium animals biological process
2015/7/6
Increasing atmospheric CO2 over the next 200 years will cause the pH of ocean waters to decrease further. Many recent studies have examined the effect of decreasing pH on calcifying organisms in ocean...
Ocean Acidification in the California Current System
Upwelling systems natural acidity the ocean surface carbonate mineral aragonite sea water carbon dioxide ocean acidification
2015/7/6
Eastern boundary upwelling systems (EBUS) are naturally more acidic than most of the rest of the surface ocean. Observations of EBUS already show pH values and saturation states with regard to the car...
Observing Ocean Acidification from Space
Space-based observation weather sea surface temperature height of the sea Marine applications sea ocean color thermal stress coral bleaching
2015/7/6
Space-based observations provide synoptic coverage of surface ocean temperature, winds, sea surface height, and color useful to a wide range of oceanographic applications. These measurements are incre...
Ocean Acidification: Present Conditions and Future Changes in a High-CO2 World
Carbon dioxide the world the sea sea water chemistry biological ecosystems climate change Marine life geochemistry
2015/7/6
The uptake of anthropogenic CO2 by the global ocean induces fundamental changes in seawater chemistry that could have dramatic impacts on biological ecosystems in the upper ocean. Estimates based on t...
An Accounting of the Observed Increase in Oceanic and Atmospheric CO2 and an Outlook for the Future
Carbon dioxide atmosphere ocean burning fossil fuel emissions
2015/7/6
Observations of CO2 accumulation in the atmosphere and ocean show that they are approximately equal to the total amount emitted by burning of fossil fuels since 1850. A mass balance calculation is car...
Ocean Acidification: A Critical Emerging Problem for the Ocean Sciences
Ocean acidification water chemistry carbon dioxide the ocean
2015/7/6
Over a period of less than a decade, ocean acidification—the change in seawater chemistry due to rising atmospheric carbon dioxide (CO2) levels and subsequent impacts on marine life—has become one of ...
SPAP2基因的克隆、融合表达及分离纯化
SPAP2基因 克隆 融合表达zz')" href="#"> SPAP2基因 克隆 融合表达
2009/11/23
本文构建的表达载体pGex-2T-SPAP2CT在大肠杆菌中表达出可融性蛋白, 其分子量为46 000, 经纯化后得到产率为10%、 纯度大于90%的GST-SPAP2CT蛋白.
Statistical measures of distribution patterns of silicon and calcium in marine sedimentary layers
Statistical measures distribution patterns silicon calcium marine sedimentary layers
2009/11/3
We analyze electron microscope X-ray spectroscopy data of recent supratidal marine sediments. Statistical measures are used to characterize the distribution of silicon and calcium in different layers ...
长江口崇明东滩冬季沉积物水界面营养盐通量
沉积物水界面营养盐通量 河口 潮间带 崇明东滩
2009/11/2
对长江口崇明东滩冬季沉积物中营养盐早期成岩过程和沉积物水界面营养盐通量及其影响因素进行了研究.其中，高潮滩对各项营养盐均有显著吸收，中潮滩主要表现为对TIN和SiO2-3的释放，低潮滩由于受到局部水动力作用影响，营养盐通量存在较大不确定性.分子扩散作用对沉积物水界面营养盐通量的贡献不大.由于潮滩对于水体PO3-4浓度的影响能力高于对TIN和SiO2-3的影响能力，潮滩能...
新型含吲哚环酯类化合物的合成、抑藻活性及构效关系研究
吲哚 合成 抑藻活性 定量构效关系
2009/10/14
从苔藓虫Zoobotryon pellucidum中提取的2,5,6-三溴-1-甲基芦竹碱(TBG)能较好地抑制海洋生物藤壶的附着. 为提高该类化合物在防污涂料中的复配性能, 合成了4个新型的不同卤素取代和N-取代且具有较好亲脂性能的TBG类似物. 通过1H NMR, 13C NMR, IR和元素分析对目标化合物6a～6d进行了结构表征. 生物实验结果表明, 化合物5～6对海藻Nitzschia ...
The research on the highly efficient calculation method of 3-D frequency-domain Green function
frequency-domain Green function numerical approximation Gaussian integral
2011/9/13
The traditional calculation method of frequency-domain Green function mainly utilizes series or asymptotic expansion to carry out numerical approximation, however, this method requires very careful zo...