Aviation fleet globally grows in consequence of rise in ridership,number,and hour of flight.That makes the aviation sector one of the major contributors to the global warming threat.For this reason,environmental and e...Aviation fleet globally grows in consequence of rise in ridership,number,and hour of flight.That makes the aviation sector one of the major contributors to the global warming threat.For this reason,environmental and ecologic aspects should be considered at least as much as performance at design step of an aircraft engine,namely aero-engine.To evaluate thermodynamics,environmental and ecologic aspects of an aero-engine a holistic approach is lack of the existing literature.The current paper presents the ecologic thermo-environmental index,as a novel measure,for evaluation of an aero-engine performance from a joint perspective of thermodynamics,ecological and environmental aspects.For better understanding of the dependence of ecologic thermo-environmental index on design parameters of the aero-engine a parametric study is also included.The rise in pressure ratio has an increasing impact on the ecologic thermo-environmental index whereas increase in the turbine inlet temperature also leads an increasing impact on the ecologic thermo-environmental index.On the other hand,the ecologic thermo-environmental index is found to be inversely proportional to the exergy efficiency.At the end of the study,the exergy efficiency of the turbojet engine is calculated to be varying from 44.46%to 57.12%.Additionally,the value of the ecologic thermo-environmental index of the turbojet engine ranges between 0.02 and 0.15.The author considers the present study to be beneficial to those interested in aerospace,mechanical,and environmental engineering.展开更多
The intestinal epithelium is a single cell layer that forms the largest and most important barrier against the external environment. A proper functioning of the intestinal barrier is essential for maintaining optimal ...The intestinal epithelium is a single cell layer that forms the largest and most important barrier against the external environment. A proper functioning of the intestinal barrier is essential for maintaining optimal health. A disrupted intestinal barrier function has been associated with the development of autoimmune and inflammatory diseases. Probiotics are live microorganisms that confer a health benefit to the host and have been associated with prevention of diseases such as antibiotic-associated diarrhea, irritable bowel syndrome and inflammatory bowel disease. Probiotics can improve and restore the intestinal barrier function in diverse ways and effects are thought to be species- and even strain-specific. With this research the influence of probiotic bacteria in Ecologic? BARRIER on parameters of intestinal barrier function was investigated. The results show that each bacterial strain in Ecologic?BARRIER is in vitro capable to improve the epithelial barrier in diverse ways.展开更多
Recent advances on the biodiversity, ecological roles, and functional metabolites of endophytes were summarized with some speculative comments for better understanding of this subject.
文摘Aviation fleet globally grows in consequence of rise in ridership,number,and hour of flight.That makes the aviation sector one of the major contributors to the global warming threat.For this reason,environmental and ecologic aspects should be considered at least as much as performance at design step of an aircraft engine,namely aero-engine.To evaluate thermodynamics,environmental and ecologic aspects of an aero-engine a holistic approach is lack of the existing literature.The current paper presents the ecologic thermo-environmental index,as a novel measure,for evaluation of an aero-engine performance from a joint perspective of thermodynamics,ecological and environmental aspects.For better understanding of the dependence of ecologic thermo-environmental index on design parameters of the aero-engine a parametric study is also included.The rise in pressure ratio has an increasing impact on the ecologic thermo-environmental index whereas increase in the turbine inlet temperature also leads an increasing impact on the ecologic thermo-environmental index.On the other hand,the ecologic thermo-environmental index is found to be inversely proportional to the exergy efficiency.At the end of the study,the exergy efficiency of the turbojet engine is calculated to be varying from 44.46%to 57.12%.Additionally,the value of the ecologic thermo-environmental index of the turbojet engine ranges between 0.02 and 0.15.The author considers the present study to be beneficial to those interested in aerospace,mechanical,and environmental engineering.
文摘The intestinal epithelium is a single cell layer that forms the largest and most important barrier against the external environment. A proper functioning of the intestinal barrier is essential for maintaining optimal health. A disrupted intestinal barrier function has been associated with the development of autoimmune and inflammatory diseases. Probiotics are live microorganisms that confer a health benefit to the host and have been associated with prevention of diseases such as antibiotic-associated diarrhea, irritable bowel syndrome and inflammatory bowel disease. Probiotics can improve and restore the intestinal barrier function in diverse ways and effects are thought to be species- and even strain-specific. With this research the influence of probiotic bacteria in Ecologic? BARRIER on parameters of intestinal barrier function was investigated. The results show that each bacterial strain in Ecologic?BARRIER is in vitro capable to improve the epithelial barrier in diverse ways.
文摘Recent advances on the biodiversity, ecological roles, and functional metabolites of endophytes were summarized with some speculative comments for better understanding of this subject.
