نتایج جستجو برای: deoxygenation
تعداد نتایج: 1314 فیلتر نتایج به سال:
Over the last 1,000 years, changing climate strongly influenced ecosystem of coastal oceans such as Baltic Sea. Sedimentary records revealed that temperatures could be linked to oxygen levels, spreading anoxic, oxygen-free areas in However, attribution levels remains challenging. This work simulates a preindustrial period 850 covering Medieval Climate Anomaly (MCA) and Little Ice Age using coup...
Abstract Climate change and plastics pollution are dual threats to marine environments. Here we use biogeochemical microplastic modelling show that even if there is complete removal of microplastics cessation deposition in the oceans 2022, regional recovery from microplastic-induced remineralization water column deoxygenation could take hundreds years for coastal upwelling zones, North Pacific ...
A new method for synthesis of amides and hydroxamic acids from nitroarenes and aldehydes is described. The MnO2 catalyzed thermal deoxygenation of nitrobenzene resulted in formation of a reactive nitroso intermediate which on reaction with aldehydes provided amides and hydroxamic acids. The thermal neat reaction in the presence of 0.01 mmol KOH predominantly led to formation of hydroxamic acid ...
Background Left ventricular hypertrophy in aortic stenosis (AS) is characterised by reduced myocardial perfusion reserve due to coronary microvascular dysfunction. However, it remains unclear whether the hypoperfusion seen in severe AS leads to myocardial tissue deoxygenation and thus, ischemia during stress. The aim of this study was to assess myocardial oxygenation and perfusion in patients w...
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