从网上偶然发现了很有趣的实验，作者的小外孙女用微波炉加热后的水与普通炉子加热后的水放凉后同时滋养修剪的植物和浇花，来比较这两种水的差异。图文并茂，还是很有说服力的。对我们认识微波炉的“危害”会有帮助。
原文链接：
http://www.execonn.com/sf/
Microwaved Water and Plants
Below is a science fair project that my granddaughter did for 2006. In itshe took filtered water and divided it into two parts. The first part sheheated to boiling in a pan on the stove, and the second part she heated toboiling in a microwave. Then after cooling she used the water to water twoidentical plants to see if there would be any difference in the growthbetween the normal boiled water and the water boiled in a microwave. Shewas thinking that the structure or energy of the water may be compromised bymicrowave. As it turned out, even she was amazed at the difference.Below are the pictures that were actually submitted with the project. Someof them were created with photoshop for the science fair presentation fromthe original photos, so the display would be consistant and easy to follow.The actual original photos are posted at the bottom with thumbnails. Theyare thumbnailed because the original photos were extremely high resolution.Marshall Dudley
 
Followup. We have seen a number of comments on this, such as what was thewater in the microwave boiled in. The thinking is that maybe some leachingtook place if it was in plastic. It was boiled in a plastic cup, so thiscould be a possibility. Also it was not a double blind experiment, so sheknew which was which when watering them. On top of that she was wanting themicrowaved ones to do poorly, and although most scientists would dismiss theidea, it is possible that her thoughts toward each plant had an effect aswell. Bottom line is, the results are interesting, and duplicate the resultsthat others have reported (try Googling '"microwaved water" plants') moreexperiments need to be done with better controls and as a double blindstudy. But this was a simple 6th grade science fair project, and was neverintended to be anything more than that.The plants were genetically identical, they were produced from graphs fromthe same parent plant, so that variable can be eliminated.
update 2:
Below are the original photos that were taken. The above photos were createdfrom them, some were simply shrunk and text added, but because ofinconsistancy in the original pictures, where some of them only showed oneplant at a time, or no picture was taken that day of the control, some ofthem are splices of the original pictures. So although some of the imagesmay appear to be faked, that was not the intention. The actual photos eachwere spliced from in in these below without modification.
[ 本帖最后由 淳厚 于 2009-6-2 22:59 编辑 ] |
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