Xem 1-8 trên 8 kết quả Carbon fluxes
  • Principles of operation Magnetic Flux Leakage (MFL) inspection techniques are electromagnetic test methods primarily used to detect flaws or defects in high-permeability ferromagnetic metals such as carbon steel tubing, plate, wire rope and tubular parts.

    pdf4p truongvucknd 18-06-2014 14 2   Download

  • Phototrophic green bacteria, phototrophic purple bacteria, and heliobacteria are three groups of bacteria that use anoxygenic photosynthesis. Anoxygenic phototrophs have photosynthetic pigments called bacteriochlorophylls. Bacteriochlorophyll a and b have maxima wavelength absorption at 775 nm and 790 nm, respectively in ether. Unlike oxygenic phototrophs, anoxygenic photosynthesis only functions using a single photosystem. This restricts them to cyclic electron flow only, and they are therefore unable to produce O2 from the oxidization of H2O.

    pdf358p conquynho32 15-09-2012 32 14   Download

  • Scale is a unifying concept that cuts across all natural and social sciences. At the same time, scaling is a common challenge in both basic and applied research. Accordingly, scale and scaling have become two of the most widely used buzzwords in ecology today. Over the past two decades, more than a dozen books and many more journal papers have been published on the problems of scale and scaling in ecology and geophysical sciences. These publications, as reviewed in the chapters of this book, have contributed significantly to our current understanding of scale issues.

    pdf366p phoebe75 01-02-2013 22 6   Download

  • Over the last ten years or so, interest in outdoor ambient air pollution monitoring has tended to move away from carbon monoxide and towards other pollutants such as NOx and particulate matter. This is due to the limited direct health impacts associated with exposure to modest amounts of carbon monoxide. There has also been a gerneral decrease in the ambient concentrations of carbon monoxide measured in recent years as a result of improved vehicle technology.

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  • Nevertheless, it also seems likely that substantial demand for voluntary GHG emission reductions can exist even where there are regulatory requirements. “Carbon neutrality” has become a goal for many companies seeking to attract customers by providing environmentally friendly products and services. Likewise, growing awareness about climate change has sparked an interest among many individuals to do their part to help solve the problem.

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  • We describehere anovelmethodology for rapiddiagnosis of metabolic changes,which is basedonprobabilistic equations that relate GC-MS-derived mass distributions in proteino-genic aminoacids toin vivoenzyme activities. Thismetabolic flux ratio analysis by GC-MS provides a comprehensive perspective on central metabolism by quantifying 14 ratios of fluxes through converging pathways and reactions from [1-13 C] and [U-13 C]glucose experiments.

    pdf12p tumor12 20-04-2013 8 2   Download

  • Peng et al. Nanoscale Research Letters 2011, 6:219 http://www.nanoscalereslett.com/content/6/1/219 NANO IDEA Open Access Migration of carbon nanotubes from liquid phase to vapor phase in the refrigerant-based nanofluid pool boiling Hao Peng1,2, Guoliang Ding1*, Haitao Hu1 Abstract The migration characteristics of carbon nanotubes from liquid phase to vapor phase in the refrigerant-based nanofluid pool boiling were investigated experimentally. Four types of carbon nanotubes with the outside diameters from 15 to 80 nm and the lengths from 1.5 to 10 μm were used in the experiments.

    pdf11p dauphong13 09-02-2012 13 7   Download

  • Competing geophysical/geochemical hypotheses for how Earth’s surface became oxygenated – organic carbon burial, hydrogen escape to space, and changes in the redox state of volcanic gases – are examined and a more biologically-based hypothesis is offered in response. It is argued that compared to the modern oxygenated world, organic carbon burial is of minor importance to the accumulation of oxygen in a mainly anoxic world where aerobic respiration is not globally significant. Thus, for the Paleoproterozoic Great Oxidation Event (GOE) ~ 2.

    pdf27p giamdocamnhac 06-04-2013 27 3   Download

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