影视作品字幕艺术表现形式的作用

字幕是影视作品的三大组成要素之一。影视作品字幕在字体、色彩、衬底、排列、特效等几个方面具有表现形式,合理利用字幕的五种艺术表现形式,有利于强化影视作品的艺术效果、形成影视作品统一的整体、实现影视作品内容与形式的统一、表达影视作品的层次结构、提升影视作品的艺术风格。     

固体碱催化剂在化学反应中的应用

对最新应用的固体碱催化剂催化的化学反应进行比较详细的讨论．     

衬底表面预处理增强金刚石薄膜成核的研究进展

近年来与金刚石成核有关的技术研究取得了较大的进展。本综述了衬底表面的预处理对增强利用化学气机沉积生长金刚石薄膜成核的作用，并进行了分析和讨论。     

顶空气相色谱法测定化妆品中甲醇

本文采用顶空气相色谱法测定化妆品中甲醇的含量。用氢火焰离子化检测器检测，化妆品中甲醇的最低检测浓度为1．5mg／kg，在样品中加标量分别为20mg和40mg时，回收率为91．9％-95．2％，依本法取两份样品分别测6次，变异系数为1．6％-2．8％。     

准自由支撑铝薄膜系统的制备及其特征表面形貌

采用真空蒸发的方法在液体基底表面成功制备了具有自由支撑边界条件的金属铝薄膜系统，观察并研究了薄膜中的特征表面形貌。实验发现：铝薄膜中存在着由一块块近似为长方形的畴块连接而成的自薄膜边缘向薄膜内部区域生长的特征带状结构形貌；带状结构中畴块的最大长度和最大宽度均先随薄膜厚度的增加而增大，随后稳定变小。分析认为：这些现象是由于液体基底与固体薄膜之间的特征相互作用所致。     

雷公藤试管苗的驯化和移栽

研究炼苗时间、培养基质、栽培条件对雷公藤试管苗移栽成活率的影响。结果显示,采用3d闲瓶炼苗＋3d开瓶炼苗处理雷公藤试管苗移栽成活率最高,达63．3％。采用50mg／L的ABT3号生根粉浸泡根部、在腐殖土与红土1：1配比的基质中移栽成活率最高,达89．6％。雷公藤试管苗驯化和移栽过程中,不宜进行根叶修剪,只需剪掉近地面几片较为枯萎的叶子以便于移栽操作,移栽苗在空气湿度高于60％的条件下室外种植即可,不必进行温室培养。     

“固体废物处理处置”课程实践教学中学生职业核心能力的培养探析

“固体废物处理处置”是环境监测与治理技术专业的职业核心课程之一,在该课程专业实践教学中将知识、专业技能、职业核心能力三者有机结合,实践项目的实施过程中不仅注重学生专业技能的提升,同时还更加注重学生与人交流、团队合作、自我学习及解决问题等职业核心能力的培养。实践证明专业实践教学是培养高职学生核心能力的有效途径。     

A single session of resistance exercise does not reduce postprandial lipaemia

This study investigated the effect of a single session of resistance exercise on postprandial lipaemia. Eleven healthy normolipidaemic men with a mean age of 23 (standard error = 1.4) years performed two trials at least 1 week apart in a counterbalanced randomized design. In each trial, participants consumed a test meal (1.2?g fat, 1.1?g carbohydrate, 0.2?g protein and 68 kJ?·?kg^?1 body mass) between 08.00 and 09.00?h following a 12?h fast. The afternoon before one trial, the participants performed an 88?min bout of resistance exercise. Before the other trial, the participants were inactive (control trial). Resistance exercise was performed using free weights and included four sets of 10 repetitions of each of 11 exercises. Sets were performed at 80% of 10-repetition maximum with a 2?min work and rest interval. Venous blood samples were obtained in the fasted state and at intervals for 6?h postprandially. Fasting plasma triacylglycerol (TAG) concentration did not differ significantly between control (1.03?±?0.13?mmol?·?l^?1) and exercise (0.94?±?0.09?mmol?·?l^?1) trials (mean?± standard error). Similarly, the 6?h total area under the plasma TAG concentration versus time curve did not differ significantly between the control (9.84?±?1.40?mmol?·?l^?1?·?6?h^?1) and exercise (9.38?±?1.12?mmol?·?l^?1?·?6?h^?1) trials. These findings suggest that a single session of resistance exercise does not reduce postprandial lipaemia.     

Evolution of fat oxidation during exercise in obese pubertal boys: Clinical implications

Abstract

In this study, we examined fat oxidation rates during exercise in obese pubescent boys. Three groups of pubescent boys (16 pre-pubescent, Tanner's stage I; 16 pubescent, Tanner's stage III; and 14 post-pubescent, Tanner's stage V) performed a graded test on a leg cycle ergometer. The first step of the test was fixed at 30 W and power was gradually increased by 20 W every 3.5 min. Oxygen consumption ([Vdot]O₂) and carbon dioxide production ([Vdot]CO₂) were determined as the means of measurements during the last 30 s of each step, which allowed us to calculate fat oxidation rates versus exercise intensity. Between 20 and 50% of peak oxygen consumption ([Vdot]O_2peak), fat oxidation rate in relative values (mg · min^?1 · kg FFM^?1) decreased continuously with pubertal development. In the same way, the maximum rate of fat oxidation occurred at a lower percentage of [Vdot]O_2peak (pre-pubescent: 49.47 ± 1.62%; pubescent: 47.43 ± 1.26%; post-pubescent: 45.00 ± 0.97%). Our results confirm that puberty is responsible for a decrease in fat free mass capacities to use fat during exercise. The results suggest that post-pubescent obese boys need to practise physical activity at a lower intensity than pre-pubescent boys to enhance lipolysis and diminish adipose tissue and the consequences of obesity.     

衬底温度和生长速率对In0.2Ga0.8As分子束外延薄膜生长影响

采用分子束外廷生长技术,在GaAs衬底上制备InGaAs外廷材料。实验结果表明,衬底温度直接决定了InGaAs材料制备过程中In原子在界面间的渗析和In原子在外延层表面迁移,影响了IhGaAs外延材料的生长模式;生长速率影响着InGaAs外延层的质量。实验结果表明,通过调整衬底温度和生长速率,在衬底温度为500℃,生长速率为1200nm／h时,制备出的样品结晶质量和表面形貌最好。