Organic Crosslinked Polymer-Derived N/O-Doped Porous Carbons for High-Performance Supercapacitor.

Supercapacitors, as a new type of green electrical energy storage device, are a potential solution to environmental problems created by economic development and the excessive use of fossil energy resources. In this work, nitrogen/oxygen (N/O)-doped porous carbon materials for high-performance supercapacitors are fabricated by calcining and activating an organic crosslinked polymer prepared using polyethylene glycol, hydroxypropyl methylcellulose, and 4,4-diphenylmethane diisocyanate. The porous carbon exhibits a large specific surface area (1589 m2·g-1) and high electrochemical performance, thanks to the network structure and rich N/O content in the organic crosslinked polymer. The optimized porous carbon material (COCLP-4.5), obtained by adjusting the raw material ratio of the organic crosslinked polymer, exhibits a high specific capacitance (522 F·g-1 at 0.5 A·g-1), good rate capability (319 F·g-1 at 20 A·g-1), and outstanding stability (83% retention after 5000 cycles) in a three-electrode system. Furthermore, an energy density of 18.04 Wh·kg-1 is obtained at a power density of 200.0 W·kg-1 in a two-electrode system. This study demonstrates that organic crosslinked polymer-derived porous carbon electrode materials have good energy storage potential.

Effect of self-control on health promotion behavior in patients with coronary heart disease: mediating effect of ego-depletion.

The present study used a cross-sectional survey design to explore the role of ego-depletion in the relationship between self-control and health-promoting behaviors in patients with coronary heart disease (CHD). This study recruited 277 patients with CHD to measure the levels of ego-depletion, self-control and health-promotion (HP) behavior using Self-Regulatory Fatigue Scale (SRF-s), Dual-Mode of Self-Control Scale (DMSD-s) and Health Promotion Lifestyle Profile-II (HPLP-II) to examine the relationship between the three. Study found that self-control improved the patients' HP behaviors to some extent. Self-control in patients with CHD uses ego-depletion as the mediating variable to indirectly and positively predict the level of HP behavior, and the mediating effects account for 47.76% (impulsive system) and 15.6% (control system) of the total effects, respectively.

[Assessment of life quality in patients with chronic heart failure].

OBJECTIVE: Using Kansas city cardiomyopathy questionnaire (KCCQ) to evaluate the quality of life (QOL) of the patients with chronic heart failure. METHODS: A total of 271 hospitalized patients with heart failure symptoms in cardiology department, Peking Union Medical College Hospital, who undergone coronary angiography from December 2007 to December 2008, were included in this study. QOL of the subjects was measured, and their demographic and clinical data were collected. Patients were divided into 2 groups according to heart function and they were compared by QOL.Multiple linear regression analysis was conducted to identify the variables associated with the quality of life. RESULTS: KCCQ physical limitation scores of the patients of left ventricular elective fraction (LVEF) < 50% (n = 50) and LVEF > or = 50% (n = 221) were (66 +/- 22) points and (73 +/- 22) points (P < 0.05). In the patients of NYHA I/II (n = 227) vs NYHA III/IV (n = 44), KCCQ scores of physical limitation, symptoms and QOL were (74 +/- 20) vs (60 +/- 27) points, (62 +/- 22) vs (49 +/- 25) points and (61 +/- 16) vs (53 +/- 18) points (all P < 0.05). In the patients of heart failure grade A/B (n = 197) vs grade C/D (n = 74), KCCQ scores of physical limitation, symptoms and QOL were (75 +/- 19) vs (61 +/- 26) points, (63 +/- 22) vs (52 +/- 24) points, (61 +/- 16) vs (56 +/- 18) points (all P < 0.05). Multiple linear regression analysis of QOL KCCQ showed that, age, NYHA cardiac function classification, gender and Judkins score were the risk factors of patients' physical limitation (P < 0.01); gender and stages of heart failure were the risk factors of patients'symptoms (P < 0.01); gender was the risk factors of patients'social function (P < 0.01). CONCLUSION: The patients with poor cardiac function have a poor QOL. KCCQ is more sensitive for the evaluation of heart function. Age, NYHA, gender, Judkins score and stages of heart failure can change QOL for the patients with chronic heart failure.