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1284

Centuries: 12th century - 13th century - 14th century

Decades: 1230s 1240s 1250s 1260s 1270s - 1280s - 1290s 1300s 1310s 1320s 1330s

Years: 1279 1280 1281 1282 1283 - 1284 - 1285 1286 1287 1288 1289


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Photosynthesis

... with which to reduce carbon dioxide into carbohydrates. Van Neil's proposal was confirmed 20 years later by using the O18 isotope of oxygen as a tracer label to follow the ...

 
 
 
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