Porous intermetallics show potential in the field of filtration and separation as well as in the field of catalysis.Herein,porous Ti Fe2intermetallics were fabricated by the reactive synthesis of elemental powders.The...Porous intermetallics show potential in the field of filtration and separation as well as in the field of catalysis.Herein,porous Ti Fe2intermetallics were fabricated by the reactive synthesis of elemental powders.The phase transformation and pore formation of porous TiFe2intermetallics were investigated,and its corrosion behavior and hydrogen evolution reaction(HER)performance in alkali solution were studied.Porous TiFe2intermetallics with porosity in the range of 34.4%-56.4%were synthesized by the diffusion reaction of Ti and Fe elements,and the pore formation of porous TiFe2intermetallic compound is the result of a combination of the bridging effect and the Kirkendall effect.The porous TiFe2samples exhibit better corrosion resistance compared with porous 316L stainless steel,which is related to the formation of uniform nanosheets on the surface that hinder further corrosion,and porous TiFe2electrode shows the overpotential of 220.6 and 295.6 mV at 10 and 100 mA·cm-2,suggesting a good catalytic performance.The synthesized porous Fe-based intermetallic has a controllable pore structure as well as excellent corrosion resistance,showing its potential in the field of filtration and separation.展开更多
The incidence of hyponatremia after spinal cord injury was reported to be between 25 and 80%.Hyponatremia can lead to a variety of clinical symptoms,from mild to severe and even life-threatening.Hyponatremia is often ...The incidence of hyponatremia after spinal cord injury was reported to be between 25 and 80%.Hyponatremia can lead to a variety of clinical symptoms,from mild to severe and even life-threatening.Hyponatremia is often associated with diabetes insipidus,which refers to insufficient arginine vasopressin(AVP)secretion or defective renal response to AVP,with clinical manifestations of syndromes such as hypoosmolality,polydipsia,and polydipsia.Recent mechanistic studies on hyponatremia and diabetes insipidus after acute spinal cord injury have been performed in isolation,without integrating the above two symptoms into different pathological manifestations that occur in the same injury state and without considering the acute spinal cord injury patient’s condition as a whole.The therapeutic principles of CSWS and SIADH are in opposition to one another.It is not easy to identify the mechanism of hyponatremia in clinical practice,which makes selecting the treatment difficult.According to the existing theories,treatments for hyponatremia and diabetes insipidus together are contraindicated,whether the mechanism of hyponatremia is thought to be CSWS or SIADH.In this paper,we review the mechanism of these two pathological manifestations and suggest that our current understanding of the mechanisms of hyponatremia and diabetes insipidus after high acute cervical SCI is insufficient,and it is likely that there are other undetected pathogenetic mechanisms.展开更多
基金financially supported by the National Natural Science Foundation of China(No.51971251)。
文摘Porous intermetallics show potential in the field of filtration and separation as well as in the field of catalysis.Herein,porous Ti Fe2intermetallics were fabricated by the reactive synthesis of elemental powders.The phase transformation and pore formation of porous TiFe2intermetallics were investigated,and its corrosion behavior and hydrogen evolution reaction(HER)performance in alkali solution were studied.Porous TiFe2intermetallics with porosity in the range of 34.4%-56.4%were synthesized by the diffusion reaction of Ti and Fe elements,and the pore formation of porous TiFe2intermetallic compound is the result of a combination of the bridging effect and the Kirkendall effect.The porous TiFe2samples exhibit better corrosion resistance compared with porous 316L stainless steel,which is related to the formation of uniform nanosheets on the surface that hinder further corrosion,and porous TiFe2electrode shows the overpotential of 220.6 and 295.6 mV at 10 and 100 mA·cm-2,suggesting a good catalytic performance.The synthesized porous Fe-based intermetallic has a controllable pore structure as well as excellent corrosion resistance,showing its potential in the field of filtration and separation.
文摘The incidence of hyponatremia after spinal cord injury was reported to be between 25 and 80%.Hyponatremia can lead to a variety of clinical symptoms,from mild to severe and even life-threatening.Hyponatremia is often associated with diabetes insipidus,which refers to insufficient arginine vasopressin(AVP)secretion or defective renal response to AVP,with clinical manifestations of syndromes such as hypoosmolality,polydipsia,and polydipsia.Recent mechanistic studies on hyponatremia and diabetes insipidus after acute spinal cord injury have been performed in isolation,without integrating the above two symptoms into different pathological manifestations that occur in the same injury state and without considering the acute spinal cord injury patient’s condition as a whole.The therapeutic principles of CSWS and SIADH are in opposition to one another.It is not easy to identify the mechanism of hyponatremia in clinical practice,which makes selecting the treatment difficult.According to the existing theories,treatments for hyponatremia and diabetes insipidus together are contraindicated,whether the mechanism of hyponatremia is thought to be CSWS or SIADH.In this paper,we review the mechanism of these two pathological manifestations and suggest that our current understanding of the mechanisms of hyponatremia and diabetes insipidus after high acute cervical SCI is insufficient,and it is likely that there are other undetected pathogenetic mechanisms.
