关于偶然的发现的作文

[偶然的发现作文]偶然的发现作文（一）偶然，会使人自信；偶然，可以决定成功与失败。牛顿，一次偶然被苹果砸了头，发现了万有引力；爱迪生，偶然想起黑夜里的太阳，发明了电灯。我也有过偶然，虽然没有所发明和...+阅读

关于偶然的发现的作文

An 'Accidental' Discovery This story was related to me by a supervisor during my first post-doc. I have no documentation for it, however, it makes a good story even if it is only a story. In the late nineteenth century, scientists studying the basis for contraction of the heart muscle were hampered by an inability to obtain beating isolated hearts. It was already known that a well-oxygenated heart continues to beat after excision from the subject, therefore no nervous input is needed. However after a short time hearts removed from animals stopped beating despite rigorous maintenance of temperature and perfusion with an oxygenated physiological saline solution. Electrical stimulation was not successful either. This was especially puzzling, since skeletal muscle can be stimulated to contract for a very long time after its isolation. A cardiovascular physiologist, Sidney Ringer, was attempting to study isolated hearts and like other physiologists he used a saline solution consisting primarily of sodium, potassium, and chloride ions, with a buffer added to the solution. Like any good scientist he used distilled water to prepare his solutions. Like the other cardiovascular physiologists of the time, he observed that the heart muscle failed to contract after a short time. Then one day, inexplicably, an isolated heart preparation beat vigorously and continued to beat for hours! It turned out that the lab had run out of distilled water, and rather than remain idle the technician used river water to make up the solutions. River water contains, among other minerals, calcium ions. This accidental discovery led to the finding that heart muscle, unlike skeletal muscle, requires extracellular calcium to contract. If Ringer's technician had not kept a record of how he had proceeded that day the 'mystery' would have remained unexplained, and most likely someone else would eventually have been credited with the discovery. Keep track of all details of procedures in your notebook, and include any changes to procedure, no matter how seemingly unimportant they are at the time. Not only do you need the details to refine methods and confirm errors, but you may in fact discover something new.

以偶然的发现为题写一篇作文600字以上

绵绵地春雨，唤醒万物；聒噪的鸣蝉，赶走酷热；淡雅的菊花，带来迷人的花香，皑皑的白雪，孕育着新的生命。就这样，我已度过了十几个春夏秋冬，抬起头，偶然间发现----

题记

时光飞快的流逝，转眼间我已经14岁了，14年，在我心中留下了一道道印迹，酸甜苦辣，我发现，我已经真正的跟童年挥手告别了，抬头看，天依旧那么蓝，那么净，可是我已不再是孩子。

思绪飘飞，仿佛又回到了从前，想小时是那么天真幼稚，竟然会为一块糖跟伙伴们争的面红耳赤，儿时，却又是那么自由轻松整天无忧无虑，叽叽喳喳，像一只快乐的小鸟。没有繁重的作业，也没必要为考试而伤透脑筋，每一天，都在做着一个童话般的梦，向往着公主与王子过上幸福的生活，可恶的女巫受到惩罚。

然而现在的我，却已没有了儿时的洒脱，不知不觉间，懂得了沉着、冷静，我不会再为一块糖一个玩具而大哭不止，更不会在商店门口拉住妈妈的衣角，哭喊着要东西，惹妈妈生气。

我已经学会洗衣服，做饭，不会再做那衣来伸手、饭来张口的小公主，更多的是学会怎样为人处事，我明白了许多道理，更懂得了如何做人。

现在的我，不会再像以前一样，为一点芝麻大小的事而掉下一大串的金豆豆，我懂得了坚强，面对困难，我更多的是选择面对。我经常会对自己说，用自己的力量去战胜一切，相信自己，你一定行，要取得最后的胜利，不要把希望寄托在别人身上。

现在的我，已学会“分担”二字，更懂得其所蕴含的深刻道理。在母亲生病时，我照顾妈妈，并且主动地做自己力所能及的家务，从而减轻妈妈的负担，我想这应该就叫“分担”吧

面对如今的生活，我已经渐渐熟悉了，并且能够从容面对，我的生活我作主，我真正成了自己的主人。

回过神来，想想现在，我确实改变了不少，天依旧那么蓝，我的心依然向往蓝天，不同的是，我已经学会了飞翔。

就这样偶然间，我发现：我长大了！

偶然的发现600字作文

就是雨落下的不经意间，她也会去观赏大地上那可爱之景。她希望彼此的友谊能在夜晚暴风雨中放肆、疯狂地生长。她幻想着，满足着，憧憬着，等待着。等到春去秋来下个轮回，我就会化茧成蝶飞得更美。偶然间，我发现了你，我的朋友。初次相见，却让我心潮涌动。这一面恍如百年之缘。看着你的音容笑貌，注视着你的一举一动，都好像昔日我的梦。从不相信世间有缘的我，却也固执地认为：你是我一生的最爱。郁郁之中，我思念着你，饱尝着相思的痛苦与折磨。思友之痛也是一种痛。当我孤单的时候，我会想起你，我的朋友。只有你能驱散我心头的愁云，只有你能给予我最好的安慰。偶然间，我发现了你，我的朋友。就是雨落下的不经意间，她也会去观赏大地上那可爱之景。

她希望彼此的友谊能在夜晚暴风雨中放肆、疯狂地生长。她幻想着，满足着，憧憬着，等待着。等到春去秋来下个轮回，我就会化茧成蝶飞得更美。你曾对我说，相逢是首歌，眼睛是春天的海，青春是绿色的河。相逢是首歌，同行是你和我，心儿是年轻的太阳，真诚也活泼。相逢是首歌，分别是明天的路，思念是生命的火。相逢是首歌，歌手是你和我，心儿是永远的琴弦，坚定也执着。偶然间，我发现了你，我的朋友。我发现了你的美，是那种自然、洒脱、不拘谨的美，放荡不羁，却感染者我，影响着我。一步步走进我的心，融入到我的血液里，我为你倾倒，为你骄傲。因为你的存在，我顿觉人生完整。我发现了你的纯，那种单纯是世间任何泉水，天上任何白雪所不能覆盖的。

这种纯是那种有穿透力，有魅力，能是一切为之让步的纯。你的纯吸引着我，我被你的纯所吸引。我发现了你那灵动的心。那跃动着的，是有活力的音符，组成的，是你原创的快乐的歌。蹦蹦跳跳，闪闪烁烁，一字一句，如痴如醉。灵灵跃动着的，是不同寻常的心。你的心好似太阳，照耀我今生今世。我一直享受着你的阳光，我会一直爱着你的美，爱着你的好，直至永远······ 那不经意间，你对我说：永远的朋友，永远的歌；永远的追逐，永远的梦······