<strong>Objective:</strong> To compare the clinical efficacy and safety of ultrasound-guided microwave ablation with surgery for the treatment of primary parathyroid adenoma. <strong>Methods:</str...<strong>Objective:</strong> To compare the clinical efficacy and safety of ultrasound-guided microwave ablation with surgery for the treatment of primary parathyroid adenoma. <strong>Methods:</strong> The clinical data of patients with primary parathyroid adenoma admitted to the First Hospital of Yangtze University from January 2010 to May 2020 were retrospectively analyzed, and they were divided into 43 cases in the microwave ablation group (MWA) and 39 cases in the surgical procedure group (SR) according to the different treatment methods. The surgical condition, postoperative complications, and changes in serum parathyroid hormone (PTH) and serum calcium and phosphorus levels were analyzed in both groups. <strong>Results:</strong> The hospital stay and operation time of patients in the microwave ablation group were shorter than those in the surgical group, and the intraoperative bleeding was significantly less than that in the surgical group (P < 0.05);the serum parathyroid hormone (PTH), blood calcium and blood phosphorus levels of patients in both groups were significantly lower than those before treatment (P < 0.05) after surgery of 1, 3 and 6 months respectively, and the differences between groups were not statistically significant (P > 0.05). There was no statistically significant difference in the incidence of postoperative complications between the two groups (P > 0.05). <strong>Conclusion: </strong>Microwave ablation can achieve the same therapeutic effect as surgery. It is a safe and feasible clinical technique worthy of clinical promotion with its short hospitalization time, less bleeding and less trauma.展开更多
The experimental study of ultra-wideband (UWB) technology, its generation and on-line measurement are presented. An experimental repetitive UWB system is designed, manufactured, and tested. High-pressure spark gap swi...The experimental study of ultra-wideband (UWB) technology, its generation and on-line measurement are presented. An experimental repetitive UWB system is designed, manufactured, and tested. High-pressure spark gap switch and its components, as well as oil spark gap switch are studied experimentally on the system. Experimental results indicate that the system operates at a 200 pps repetitive rate with a stable performance. 100 MW peak power UWB pulses are obtained on the system. Fast-time response capacitive divider is designed and fabricated, allowing for an accurate measurement of the high power UWB signal. The main issues related to the design of the switch and the UWB signal online measurement are discussed.展开更多
A green microwave-assisted procedure for the preparation of a series of fifteen new N-alkylpyridazinium ionic liquids with different functionality in the alkyl chain is described. For the first time, target ionic liqu...A green microwave-assisted procedure for the preparation of a series of fifteen new N-alkylpyridazinium ionic liquids with different functionality in the alkyl chain is described. For the first time, target ionic liquids were prepared using standard methodology and under microwave irradiation in short duration of time with quantitative yields. In most cases, the microwave-assisted reaction is an environmentally friendly alternative to traditional methods.展开更多
The Au nanoparticles has been prepared by microwave high-pressure procedure with alcohol as the reducing agent. The color of colloidal Au nanoparticles is blue-violet. The maximum absorption spectrum of colloidal Au i...The Au nanoparticles has been prepared by microwave high-pressure procedure with alcohol as the reducing agent. The color of colloidal Au nanoparticles is blue-violet. The maximum absorption spectrum of colloidal Au is at 580 nm, and the resonance scattering peak is at 580 nm. Using this method, the colloidal Au of long-time stability can be prepared Simply and quickly.展开更多
Designing the specific crystal phase with better intrinsic activity and more active sites is a very promising strategy for earth-abundant electrocatalysts for oxygen evolution reaction(OER).Herein,a facile two-step me...Designing the specific crystal phase with better intrinsic activity and more active sites is a very promising strategy for earth-abundant electrocatalysts for oxygen evolution reaction(OER).Herein,a facile two-step method including the high-pressure microwave and the hydrothermal sulfurization is adopted to prepare the WS_(x)/Ni_(9)S_(8) hetero-catalyst on nickel foam(WS_(x)/Ni_(9)S_(8)/NF).Firstly,WO3 polyhedrons homogeneously cover the surface of NF through the high-pressure microwave hydrothermal process.Secondly,WS_(x)/Ni_(9)S_(8) nanoparticles on the surface of NF can be synthesized after a hydrothermal sulfurization,which has been confirmed by scanning electron microscopy(SEM) elemental mapping and high-resolution transmission electron microscopy(HRTEM).The amorphous WSx and Ni9 S8 phase may provide the dual active sites for OER.The electrochemical measurements show that WS_(x)/Ni_(9)S_(8)/NF has superior OER activity with a low overpotential of 320 mV at the current density of 100 mA·cm^(-2),better than those of other samples.The enhanced OER performance may be due to the synergistic catalysis from Ni9 S8 phase and high valence of W.Owing to the stable structure of Ni9 S8,the long-term stability of WS_(x)/Ni_(9)S_(8)/NF for at least 10 h can be obtained.This work may provide a new approach for the doped nickel sulfides crystal phase through high-pressure microwave hydrothermal assistance for OER.展开更多
心房颤动(atria l fibrillation,AF)是最常见的心律失常,能引起多种并发症和死亡率的增加。AF的发病机制可能与心房内多个折返环形成有关,对药物治疗无效的难治性AF,迷宫手术通过在心房壁上的切割和缝合,阻断折返环的形成,是外科治疗AF...心房颤动(atria l fibrillation,AF)是最常见的心律失常,能引起多种并发症和死亡率的增加。AF的发病机制可能与心房内多个折返环形成有关,对药物治疗无效的难治性AF,迷宫手术通过在心房壁上的切割和缝合,阻断折返环的形成,是外科治疗AF经典、有效的方法,但操作复杂、费时,创伤大。应用冷冻、射频、微波等各种能源的消融手术,避免了切割和缝合,简化了迷宫手术方法,效果良好,但何种方法更为有效尚无定论。改进各种消融设备和技术以提高消融手术径路的连续性和透壁性,有利于进一步改善消融手术的治疗效果,提高窦性心律的永久恢复率。展开更多
文摘<strong>Objective:</strong> To compare the clinical efficacy and safety of ultrasound-guided microwave ablation with surgery for the treatment of primary parathyroid adenoma. <strong>Methods:</strong> The clinical data of patients with primary parathyroid adenoma admitted to the First Hospital of Yangtze University from January 2010 to May 2020 were retrospectively analyzed, and they were divided into 43 cases in the microwave ablation group (MWA) and 39 cases in the surgical procedure group (SR) according to the different treatment methods. The surgical condition, postoperative complications, and changes in serum parathyroid hormone (PTH) and serum calcium and phosphorus levels were analyzed in both groups. <strong>Results:</strong> The hospital stay and operation time of patients in the microwave ablation group were shorter than those in the surgical group, and the intraoperative bleeding was significantly less than that in the surgical group (P < 0.05);the serum parathyroid hormone (PTH), blood calcium and blood phosphorus levels of patients in both groups were significantly lower than those before treatment (P < 0.05) after surgery of 1, 3 and 6 months respectively, and the differences between groups were not statistically significant (P > 0.05). There was no statistically significant difference in the incidence of postoperative complications between the two groups (P > 0.05). <strong>Conclusion: </strong>Microwave ablation can achieve the same therapeutic effect as surgery. It is a safe and feasible clinical technique worthy of clinical promotion with its short hospitalization time, less bleeding and less trauma.
文摘The experimental study of ultra-wideband (UWB) technology, its generation and on-line measurement are presented. An experimental repetitive UWB system is designed, manufactured, and tested. High-pressure spark gap switch and its components, as well as oil spark gap switch are studied experimentally on the system. Experimental results indicate that the system operates at a 200 pps repetitive rate with a stable performance. 100 MW peak power UWB pulses are obtained on the system. Fast-time response capacitive divider is designed and fabricated, allowing for an accurate measurement of the high power UWB signal. The main issues related to the design of the switch and the UWB signal online measurement are discussed.
文摘A green microwave-assisted procedure for the preparation of a series of fifteen new N-alkylpyridazinium ionic liquids with different functionality in the alkyl chain is described. For the first time, target ionic liquids were prepared using standard methodology and under microwave irradiation in short duration of time with quantitative yields. In most cases, the microwave-assisted reaction is an environmentally friendly alternative to traditional methods.
文摘The Au nanoparticles has been prepared by microwave high-pressure procedure with alcohol as the reducing agent. The color of colloidal Au nanoparticles is blue-violet. The maximum absorption spectrum of colloidal Au is at 580 nm, and the resonance scattering peak is at 580 nm. Using this method, the colloidal Au of long-time stability can be prepared Simply and quickly.
基金financially supported by Qingdao Science and Technology Benefiting People Special Project (No. 20-3-4-8-nsh)the Fundamental Research Funds for the Central Universities (No.20CX02212A)the Development Fund of State Key Laboratory of Heavy Oil Processing and China University of Petroleum Training Program of Innovation and Entrepreneurship for Undergraduates (No.201910425018)。
文摘Designing the specific crystal phase with better intrinsic activity and more active sites is a very promising strategy for earth-abundant electrocatalysts for oxygen evolution reaction(OER).Herein,a facile two-step method including the high-pressure microwave and the hydrothermal sulfurization is adopted to prepare the WS_(x)/Ni_(9)S_(8) hetero-catalyst on nickel foam(WS_(x)/Ni_(9)S_(8)/NF).Firstly,WO3 polyhedrons homogeneously cover the surface of NF through the high-pressure microwave hydrothermal process.Secondly,WS_(x)/Ni_(9)S_(8) nanoparticles on the surface of NF can be synthesized after a hydrothermal sulfurization,which has been confirmed by scanning electron microscopy(SEM) elemental mapping and high-resolution transmission electron microscopy(HRTEM).The amorphous WSx and Ni9 S8 phase may provide the dual active sites for OER.The electrochemical measurements show that WS_(x)/Ni_(9)S_(8)/NF has superior OER activity with a low overpotential of 320 mV at the current density of 100 mA·cm^(-2),better than those of other samples.The enhanced OER performance may be due to the synergistic catalysis from Ni9 S8 phase and high valence of W.Owing to the stable structure of Ni9 S8,the long-term stability of WS_(x)/Ni_(9)S_(8)/NF for at least 10 h can be obtained.This work may provide a new approach for the doped nickel sulfides crystal phase through high-pressure microwave hydrothermal assistance for OER.
文摘心房颤动(atria l fibrillation,AF)是最常见的心律失常,能引起多种并发症和死亡率的增加。AF的发病机制可能与心房内多个折返环形成有关,对药物治疗无效的难治性AF,迷宫手术通过在心房壁上的切割和缝合,阻断折返环的形成,是外科治疗AF经典、有效的方法,但操作复杂、费时,创伤大。应用冷冻、射频、微波等各种能源的消融手术,避免了切割和缝合,简化了迷宫手术方法,效果良好,但何种方法更为有效尚无定论。改进各种消融设备和技术以提高消融手术径路的连续性和透壁性,有利于进一步改善消融手术的治疗效果,提高窦性心律的永久恢复率。
