A Solid Oxide Fuel Cell(SOFC)is an electrochemical device that converts the chemical energy of a substance into electrical energy through an oxidation-reduction mechanism.The electrochemical reaction of a solid oxide ...A Solid Oxide Fuel Cell(SOFC)is an electrochemical device that converts the chemical energy of a substance into electrical energy through an oxidation-reduction mechanism.The electrochemical reaction of a solid oxide fuel cell(SOFC)generates heat,and this heat can be recovered and put to use in a waste heat recovery system.In addition to preheating the fuel and oxidant,producing steam for industrial use,and heating and cooling enclosed rooms,this waste heat can be used for many more productive uses.The large waste heat produced by SOFCs is a worry that must be managed if they are to be adopted as a viable option in the power generation business.In light of these findings,a novel approach to SOFC waste heat recovery is proposed.The SOFC is combined with a“Thermoelectric Generator and an Alkali Metal Thermoelectric Converter(TG-AMTC)”to transform the excess heat generated by both the SOFC and the TG-AMTC.The proposed TG-AMTC is evaluated using a number of performance indicators including power density,operating temperature,heat recovery rate,exergetic efficiency,energy efficiency,and recovery time.The experimental results state that TG-AMTC has provided an exergetic efficiency,energetic efficiency,and recovery time of 97%,98%,and 23%,respectively.The study proves that the proposed TG-AMTC for SOFC is an efficient method of recovering waste heat.展开更多
Multivessel coronary artery ectasia with severe calcification is rare among patients with coronary artery disease. A 74-year-old Chinese woman suffered from acute myocardial infarction on a background of 50 years of p...Multivessel coronary artery ectasia with severe calcification is rare among patients with coronary artery disease. A 74-year-old Chinese woman suffered from acute myocardial infarction on a background of 50 years of poorly controlled hypertension secondary to pheochromocytoma, which was surgically removed in June 2012 prior to the presentation. Coronary angiography revealed total occlusion of the proximal left anterior descending artery, and multiple ectasias with severe calcification in the left main, circumflex and right coronary artery. After an aspiration thrombectomy and balloon angioplasty, grade 3 coronary flow was restored in the left descending coronary artery. No cardiac events were found in the 12-month follow-up. We conclude that multivessel coronary artery ectasia and severe calcification may be present in patients with a long-standing history of hypertension secondary to pheochromocytoma.展开更多
Objective To investigate the safety and efficacy of a 3-pulmonary vein (PV) isolation approach in treating paroxysmal atrial fibrillation (AF). Methods Radiofrequency catheter ablation was used to eliminate PV potenti...Objective To investigate the safety and efficacy of a 3-pulmonary vein (PV) isolation approach in treating paroxysmal atrial fibrillation (AF). Methods Radiofrequency catheter ablation was used to eliminate PV potential in 11 patterns with frequent paroxysmal AF refractory to anti-arrhythmic agents. During sinus rhythm, PV potential was mapped in the left and right superior PVs and left inferior PV. The procedural success was defined as the elimination of PV potential in the 3 PVs. Restults PV potential was identified and abolished in a total of 24 PVs, mostly in the left and right superior PV. There was no pulmonary stenosis or other complications during or after the procedures. AF recurred in one patient after an average of 12 ± 3 month follow-up. Conclusions PV potemials were present mostly in the left or right superior PV. The 3-PVs isolation approach is safe and effective in preventing drug-resistant paroxysmal AF.展开更多
Many studies have demonstrated a correlation between increasing age and adverse drug reactions. This increased risk is related to aged-related changes in pharmacokinetics and pharmacodynamics. In addition, chronic ill...Many studies have demonstrated a correlation between increasing age and adverse drug reactions. This increased risk is related to aged-related changes in pharmacokinetics and pharmacodynamics. In addition, chronic illnesses such as congestive heart failure, coronary artery disease and hypertension are more prevalent in the elderly who also have an increased risk of diabetes, arthritis and cancer. Consequently elderly patients are often treated with multiple medications, which may cause drug interactions and adverse drug reactions. Adequate undergraduate training in clinical pharmacology and continued professional development in evidence-based therapeutics will undoubtedly reduce inappropriate prescribing and improve the quality of medications. Good communications between physicians and patients are also critically important in avoidance or prevention of adverse drug reactions in the elderly.展开更多
Objective To investigate the etiology and relative factors of dilated cardiomyopathy （DCM） in Chinese patients. Methods A case-control study was conducted to compare 233 patients with DCM in high-incidence areas （c...Objective To investigate the etiology and relative factors of dilated cardiomyopathy （DCM） in Chinese patients. Methods A case-control study was conducted to compare 233 patients with DCM in high-incidence areas （case group） and 150 patients with stable angina pectoris （control group）. Life styles and history of diseases information was collected by questionaire; human anti-myocardial antibody lgG （AMA- IgG）, human Coxsackie B virus IgG （CBV- IgG） and human adenovirus antibody IgG （ADV- IgG） were measured with ELISA. General chemical and toxicological indicators in drink water from high and low prevalence areas and serum trace elements also were compared. Results 1） Compared with the control group, the case group had more farmers （P 〈 0.01）, with low average incomes （P 〈 0.01 ）, higher alcohol consumption （P 〈 0.01） and higher incidence of the history of myocarditis （P 〈 0.01）. 2） AMA-IgG, CBV-IgG and ADV-IgG levels were low and the positive rates ofAMA-IgG, CBV-IgG and ADV-IgG of patients with DCM were respectively 7.78%, 6.67% and 6.67%, no statistical significance comparing with those in the control group. 3） The content of iron （1.36±2.18 vs 0.39±0.67 rag/L, P〈0.05） and manganese （0.38±0.35 vs 0.15±0.14, P〈0.01） in drinking water of high-incidence areas was significantly higher than that in low-incidence areas. 4） The content of serum iron （69.1±57.8 vs 20.0±17.5 umol/L, P〈0.01 ） and copper （25.7±4.2 vs 19.7±4.5 umol/L, P〈0.01） in the case group evidently exceeded the normal range and obviously higher than that in the control group. Conclusions 1） The incidence of some DCM is related with low incomes, high alcohol consumption and myoearditis. 2） These data do not support that DCM is related with persistent virus infection and autoimmunization; 3） Iron and manganese contents exceeding standards in drinking water and the high content of serum iron and copper is comparatively related with the incidence of DCM.展开更多
基金Foundation of Heilongjiang Bayi Agricultural University(Grant Nos.ZRCPY201916ZRCPY201817).
文摘A Solid Oxide Fuel Cell(SOFC)is an electrochemical device that converts the chemical energy of a substance into electrical energy through an oxidation-reduction mechanism.The electrochemical reaction of a solid oxide fuel cell(SOFC)generates heat,and this heat can be recovered and put to use in a waste heat recovery system.In addition to preheating the fuel and oxidant,producing steam for industrial use,and heating and cooling enclosed rooms,this waste heat can be used for many more productive uses.The large waste heat produced by SOFCs is a worry that must be managed if they are to be adopted as a viable option in the power generation business.In light of these findings,a novel approach to SOFC waste heat recovery is proposed.The SOFC is combined with a“Thermoelectric Generator and an Alkali Metal Thermoelectric Converter(TG-AMTC)”to transform the excess heat generated by both the SOFC and the TG-AMTC.The proposed TG-AMTC is evaluated using a number of performance indicators including power density,operating temperature,heat recovery rate,exergetic efficiency,energy efficiency,and recovery time.The experimental results state that TG-AMTC has provided an exergetic efficiency,energetic efficiency,and recovery time of 97%,98%,and 23%,respectively.The study proves that the proposed TG-AMTC for SOFC is an efficient method of recovering waste heat.
文摘Multivessel coronary artery ectasia with severe calcification is rare among patients with coronary artery disease. A 74-year-old Chinese woman suffered from acute myocardial infarction on a background of 50 years of poorly controlled hypertension secondary to pheochromocytoma, which was surgically removed in June 2012 prior to the presentation. Coronary angiography revealed total occlusion of the proximal left anterior descending artery, and multiple ectasias with severe calcification in the left main, circumflex and right coronary artery. After an aspiration thrombectomy and balloon angioplasty, grade 3 coronary flow was restored in the left descending coronary artery. No cardiac events were found in the 12-month follow-up. We conclude that multivessel coronary artery ectasia and severe calcification may be present in patients with a long-standing history of hypertension secondary to pheochromocytoma.
文摘Objective To investigate the safety and efficacy of a 3-pulmonary vein (PV) isolation approach in treating paroxysmal atrial fibrillation (AF). Methods Radiofrequency catheter ablation was used to eliminate PV potential in 11 patterns with frequent paroxysmal AF refractory to anti-arrhythmic agents. During sinus rhythm, PV potential was mapped in the left and right superior PVs and left inferior PV. The procedural success was defined as the elimination of PV potential in the 3 PVs. Restults PV potential was identified and abolished in a total of 24 PVs, mostly in the left and right superior PV. There was no pulmonary stenosis or other complications during or after the procedures. AF recurred in one patient after an average of 12 ± 3 month follow-up. Conclusions PV potemials were present mostly in the left or right superior PV. The 3-PVs isolation approach is safe and effective in preventing drug-resistant paroxysmal AF.
文摘Many studies have demonstrated a correlation between increasing age and adverse drug reactions. This increased risk is related to aged-related changes in pharmacokinetics and pharmacodynamics. In addition, chronic illnesses such as congestive heart failure, coronary artery disease and hypertension are more prevalent in the elderly who also have an increased risk of diabetes, arthritis and cancer. Consequently elderly patients are often treated with multiple medications, which may cause drug interactions and adverse drug reactions. Adequate undergraduate training in clinical pharmacology and continued professional development in evidence-based therapeutics will undoubtedly reduce inappropriate prescribing and improve the quality of medications. Good communications between physicians and patients are also critically important in avoidance or prevention of adverse drug reactions in the elderly.
文摘Objective To investigate the etiology and relative factors of dilated cardiomyopathy （DCM） in Chinese patients. Methods A case-control study was conducted to compare 233 patients with DCM in high-incidence areas （case group） and 150 patients with stable angina pectoris （control group）. Life styles and history of diseases information was collected by questionaire; human anti-myocardial antibody lgG （AMA- IgG）, human Coxsackie B virus IgG （CBV- IgG） and human adenovirus antibody IgG （ADV- IgG） were measured with ELISA. General chemical and toxicological indicators in drink water from high and low prevalence areas and serum trace elements also were compared. Results 1） Compared with the control group, the case group had more farmers （P 〈 0.01）, with low average incomes （P 〈 0.01 ）, higher alcohol consumption （P 〈 0.01） and higher incidence of the history of myocarditis （P 〈 0.01）. 2） AMA-IgG, CBV-IgG and ADV-IgG levels were low and the positive rates ofAMA-IgG, CBV-IgG and ADV-IgG of patients with DCM were respectively 7.78%, 6.67% and 6.67%, no statistical significance comparing with those in the control group. 3） The content of iron （1.36±2.18 vs 0.39±0.67 rag/L, P〈0.05） and manganese （0.38±0.35 vs 0.15±0.14, P〈0.01） in drinking water of high-incidence areas was significantly higher than that in low-incidence areas. 4） The content of serum iron （69.1±57.8 vs 20.0±17.5 umol/L, P〈0.01 ） and copper （25.7±4.2 vs 19.7±4.5 umol/L, P〈0.01） in the case group evidently exceeded the normal range and obviously higher than that in the control group. Conclusions 1） The incidence of some DCM is related with low incomes, high alcohol consumption and myoearditis. 2） These data do not support that DCM is related with persistent virus infection and autoimmunization; 3） Iron and manganese contents exceeding standards in drinking water and the high content of serum iron and copper is comparatively related with the incidence of DCM.
