你是否在拉臘米城小酌了一口檸檬水,，還是在丹佛舔了一下臺(tái)克利酒，抑或在波士頓暢飲了一頓自釀啤酒,？一項(xiàng)新的研究顯示,，通過分析毛發(fā)中的化學(xué)痕跡，你所拜訪的這些地方都在科學(xué)家的眼前展露無遺,。
據(jù)美國《科學(xué)》(Science)雜志在線新聞報(bào)道,，這是緣于水分子的同位素比會(huì)有些許的差異，而這取決于水源中的礦物質(zhì),。研究人員發(fā)現(xiàn),，根據(jù)同位素比，采自美國33個(gè)城市的水樣都可以被追溯出它們的源頭,。由于人體能夠分解水中的氫原子和氧原子以構(gòu)建形成毛發(fā)細(xì)胞的蛋白質(zhì),，因此這些細(xì)胞無形中也就保存了一個(gè)人的旅行記錄。這些信息將幫助檢舉人查找一名嫌疑犯身處犯罪現(xiàn)場(chǎng)的證據(jù),，或者為一名無辜的被告洗清罪名,。研究人員在最新一期的《農(nóng)業(yè)與食物化學(xué)雜志》上報(bào)告了這一發(fā)現(xiàn)。(生物谷Bioon.net)
生物谷推薦原文出處：
J.Agric.Food Chem. DOI: 10.1021/jf1003539
Links between Purchase Location and Stable Isotope Ratios of Bottled Water, Soda, and Beer in the United States
Lesley A. Chesson*?§, Luciano O. Valenzuela?§, Shannon P. O’Grady?, Thure E. Cerling?§# and James R. Ehleringer?§
? IsoForensics Inc., Suite 205, 423 Wakara Way, Salt Lake City, Utah 84108
§ Department of Biology, University of Utah, 257 South 1400 East, Salt Lake City, Utah 84112
# Department of Geology and Geophysics, University of Utah, 135 South 1460 East, Salt Lake City, Utah 84112
This study investigated the impact of purchase location on the stable isotope ratios of beverages by measuring the δ2H and δ18O values of bottled water, soda, beer, and tap water collected across the contiguous United States. Measured beverage δ2H and δ18O values generally fit the Global Meteoric Water Line (GMWL), suggesting region-of-origin information is recorded in beverage water. Tap water δ2H and δ18O values were strongly correlated with the stable isotope ratios of bottled water and soda purchased in the same location. Beer water δ2H and δ18O values were also correlated with tap water, although not as strongly. Variability in δ2H and δ18O values among beverages purchased at a single location ranged from 2 to 41‰ and from 0.3 to 5.2‰, respectively, but was generally moderate in most locations. It was concluded that the isotopic composition of local tap water is a reasonable proxy for consumers’ fluid intake in most U.S. cities.
