纸怀烧开水

今天在家,闲得没事干,随手拿起一本书看起来。 看着看着,一个大号标题映入了我的眼帘纸杯烧开水。哈哈哈怎么可能呢々用纸杯烧开水,纸杯先烧着了,水怎么会开呢,我忍不住放声大笑起来。可是古人说得好,“纸上得来终觉浅,绝知此事要躬行”。我为何不试一试？     

Fabrication of a gel particle array in a microfluidic device for bioassays of protein and glucose in human urine samples

This paper describes a simple method for fabricating a series of poly(ethylene glycol) diacrylate (PEG-DA) hydrogel microstructures inside microfluidic channels as probe for proteins and glucose. In order to demonstrate the feasibility of this newly developed system, bovine serum albumin (BSA) was chosen as a model protein. PEG microcolumns were used for the parallel detection of multiple components. Using tetrabromophenol blue (TBPB) and the horseradish peroxidase/glucose oxidase reaction system, bovine serum albumin (BSA) and glucose in human urine were detected by color changes. The color changes for BSA within a concentration range of 1-150 μM, and glucose within a range of 50 mM-2 M could be directly distinguished by eyes or precisely identified by optical microscope. To show the practicability of the gel particle array, protein and glucose concentrations of real human urine samples were determined, resulting in a good correlation with hospital analysis. Notably, only a 5 μL sample was needed for a parallel measurement of both analytes. Conveniently, no special readout equipment or power source was required during the diagnosis process, which is promising for an application in rapid point-of-care diagnosis.     

The rating of perceived exertion predicts intermittent vertical jump demand and performance

The aims of this study were (a) to assess the ability of the rating of perceived exertion (RPE) to predict performance (i.e. number of vertical jumps performed to a fixed jump height) of an intermittent vertical jump exercise, and (b) to determine the ability of RPE to describe the physiological demand of such exercise. Eight healthy men performed intermittent vertical jumps with rest periods of 4, 5, and 6 s until fatigue. Heart rate and RPE were recorded every five jumps throughout the sessions. The number of vertical jumps performed was also recorded. Random coefficient growth curve analysis identified relationships between the number of vertical jumps and both RPE and heart rate for which there were similar slopes. In addition, there were no differences between individual slopes and the mean slope for either RPE or heart rate. Moreover, RPE and number of jumps were highly correlated throughout all sessions (r = 0.97-0.99; P < 0.001), as were RPE and heart rate (r = 0.93-0.97; P < 0.001). The findings suggest that RPE can both predict the performance of intermittent vertical jump exercise and describe the physiological demands of such exercise.     

上课走神怎么办？

三月底,在合肥滨湖,光明老师在＂民国老课本的亲子读写课＂后,遇到一位家长说——＂孩子上课老是走神＂的问题。对此,光明老师的分析与建议是——一、自我暗示自我暗示能够激发内在心理潜力,调动心理活动积极性,有助于克服注意力涣散的现象。     

孩子上课老讲话怎么办?

正最近,"阳光会客厅"群里的一位家长与光明老师有一次交流,谈的话题是"孩子上课老讲话怎么办?"现在,与大家分享一下。(网名)村姑:老师,您好!我的儿子现在上五年级,从一年级开始上课老爱讲话,我骂过他,老师也批评过他,总好不了几天。现在是高年级了,学习任务又重,他没有学习目标,不能主动自觉地去学,成绩下降很多,我担心他一直这样下去,我该怎么办?谢谢!光明老师:教育子女是大学问!你刚才说到的你家孩子情     

孩子“厌学”怎么办？（上）

最近,“阳光会客厅”群里有一次交流,大家谈的话题是“孩子得了‘厌学症’怎么办？”现在,与大家分享一下。 （网名）我爱一米阳光：我孩子以头痛或生病为借口不愿意上学,一旦强迫他上学,他就会哭叫吵闹,甚至生病。问了一些人,也与老师进行了沟通,都说我孩子得了“厌学症”。请问光明老师,我该怎么办？     

孩子“厌学”怎么办?(下)

正江淮咸货:我建议:家长适当地降低对孩子的期望。要知道"第一"只有一个,努力是人人可以做到的。了解孩子的困难所在,帮助孩子制定切实可行的计划,并为此而努力。多与孩子在学习方法、正确处理挫折方面进行沟通与探讨,帮助孩子树立信心。光明老师:家长努力创造"学习型家庭"的氛围。家长是最好的榜样,家长爱学习,孩子会在潜移默化中受到影响。所以,即使你不     

妈妈，您辛苦了

精彩点评： 写出好文章的秘诀是平时多留意生活中的细节，写作时把生活中的小事如实地再现出来，不要一写文章就写父母为了挽救你不惜牺牲自己等这样的“大事”。