We present a controlled fabrication of selective ultrathin metal-organic framework(MOF)nanosheets as preassembling platforms,yolk-shell structured with a few-layered N-doped carbon(NC)shell-encapsulated Ni_(0.85)Se co...We present a controlled fabrication of selective ultrathin metal-organic framework(MOF)nanosheets as preassembling platforms,yolk-shell structured with a few-layered N-doped carbon(NC)shell-encapsulated Ni_(0.85)Se core(denoted as Ni_(0.85)Se@NC)via an oriented phase modulation(OPM)strategy.The ultrathin nature of the MOF nanosheets gave rise to the modification of structure at the electronic level with abundant Se-vacancies and effective electronic coupling via an Ni-N_(x) coordination at the interface between the Ni0.85Se core and NC shell.The Ni0.85Se@NC obtained exhibited low overpotentials for both oxygen evolution reaction(OER;300 mV)and hydrogen evolution reaction(HER;157 mV)at 10 mA·cm^(−2) under an alkaline condition,outperforming their corresponding bulk MOF-derived counterparts.By exploiting Ni_(0.85)Se@NC as anode and cathode catalysts,a low cell voltage of 1.61 V was achieved by performing alkaline water electrolysis.Remarkably,it also reached a high activity in natural seawater(pH=7.98)and simulated seawater(pH=7.86)electrolytes,even surpassing integrated Pt/C-RuO_(2)/CC electrodes.Density functional theory(DFT)studies illustrated that abundant Se-vacancies effectively regulated the electronic structure of Ni_(0.85)Se@NC by accelerating electron transfer from Ni to N atoms at the interface,and thus,enabling the Ni_(0.85)Se@NC to attain a near-optimal electronic configuration that stimulated ideal adsorption-free energy toward key reaction intermediates.展开更多
Background Unplanned extubation is associated with adverse outcomes in intensive care unit. The massive burn patient differs from other critically ill patients in many ways. However, little is known about the unplanne...Background Unplanned extubation is associated with adverse outcomes in intensive care unit. The massive burn patient differs from other critically ill patients in many ways. However, little is known about the unplanned decannulation （UD） in Burn Intensive Care Unit. This paper describes the special features of the circumstances and outcome of UD of tracheotomy tube in massive burn patients. Methods A case series study was performed between January 1999 and December 2008 and UD of tracheotomy tube was analyzed retrospectively. A total of 21 patients with 29 UD events were identified. Demographic data, diagnosis, intervention, UD events and outcome of UD patients were collected. Differences in proportions were compared using the chi-square （X2） or Fisher＇s exact test. Results Patients with UD were often burned with head and neck （67%） and combined with inhalation injury （62%）. The majority of them （76%） were transferred patients, occurred early （55%） and were accidental UD （79%）. UD events tended to happen in day shift （90%） and to be associated with the medical procedure that was performing by caregivers at besides （79%）. Loose of the stabilizing rope, medical procedure and tracheotomy malposition were the main causes of UD. Early UD and reintubation failure were associated with patients＇ death. Conclusions UD happened to massive burn patients can lead to patient death. Careful management of respiratory tract was essential for massive burn patients.展开更多
It is very popular to use hot-water bottles or some electric heaters to keep one warm when sleeping or sitting in cold days in China.l Unfortunately, people might be burned as a result of prolonged contact with the he...It is very popular to use hot-water bottles or some electric heaters to keep one warm when sleeping or sitting in cold days in China.l Unfortunately, people might be burned as a result of prolonged contact with the heaters because of senseless due to falling asleep, drunk or some diseases just like diabetes. This special case we reported here may help us to improve the diagnosis and treatment of low-grade thermal injury.展开更多
基金supported by the National Natural Science Foundation of China(grant nos.21875285,21771191,and 22001265)the Taishan Scholar Foundation(grant no.ts201511019)+1 种基金Key Research and Development Projects of Shandong Province(grant no.2019JZZY010331)the Fundamental Research Funds for the Central Universities(grant no.19CX05001A).
文摘We present a controlled fabrication of selective ultrathin metal-organic framework(MOF)nanosheets as preassembling platforms,yolk-shell structured with a few-layered N-doped carbon(NC)shell-encapsulated Ni_(0.85)Se core(denoted as Ni_(0.85)Se@NC)via an oriented phase modulation(OPM)strategy.The ultrathin nature of the MOF nanosheets gave rise to the modification of structure at the electronic level with abundant Se-vacancies and effective electronic coupling via an Ni-N_(x) coordination at the interface between the Ni0.85Se core and NC shell.The Ni0.85Se@NC obtained exhibited low overpotentials for both oxygen evolution reaction(OER;300 mV)and hydrogen evolution reaction(HER;157 mV)at 10 mA·cm^(−2) under an alkaline condition,outperforming their corresponding bulk MOF-derived counterparts.By exploiting Ni_(0.85)Se@NC as anode and cathode catalysts,a low cell voltage of 1.61 V was achieved by performing alkaline water electrolysis.Remarkably,it also reached a high activity in natural seawater(pH=7.98)and simulated seawater(pH=7.86)electrolytes,even surpassing integrated Pt/C-RuO_(2)/CC electrodes.Density functional theory(DFT)studies illustrated that abundant Se-vacancies effectively regulated the electronic structure of Ni_(0.85)Se@NC by accelerating electron transfer from Ni to N atoms at the interface,and thus,enabling the Ni_(0.85)Se@NC to attain a near-optimal electronic configuration that stimulated ideal adsorption-free energy toward key reaction intermediates.
文摘Background Unplanned extubation is associated with adverse outcomes in intensive care unit. The massive burn patient differs from other critically ill patients in many ways. However, little is known about the unplanned decannulation （UD） in Burn Intensive Care Unit. This paper describes the special features of the circumstances and outcome of UD of tracheotomy tube in massive burn patients. Methods A case series study was performed between January 1999 and December 2008 and UD of tracheotomy tube was analyzed retrospectively. A total of 21 patients with 29 UD events were identified. Demographic data, diagnosis, intervention, UD events and outcome of UD patients were collected. Differences in proportions were compared using the chi-square （X2） or Fisher＇s exact test. Results Patients with UD were often burned with head and neck （67%） and combined with inhalation injury （62%）. The majority of them （76%） were transferred patients, occurred early （55%） and were accidental UD （79%）. UD events tended to happen in day shift （90%） and to be associated with the medical procedure that was performing by caregivers at besides （79%）. Loose of the stabilizing rope, medical procedure and tracheotomy malposition were the main causes of UD. Early UD and reintubation failure were associated with patients＇ death. Conclusions UD happened to massive burn patients can lead to patient death. Careful management of respiratory tract was essential for massive burn patients.
文摘It is very popular to use hot-water bottles or some electric heaters to keep one warm when sleeping or sitting in cold days in China.l Unfortunately, people might be burned as a result of prolonged contact with the heaters because of senseless due to falling asleep, drunk or some diseases just like diabetes. This special case we reported here may help us to improve the diagnosis and treatment of low-grade thermal injury.
