scholarly journals Dual stable isotope characterization of excess methane in oxic waters of a mesotrophic lake

2020 ◽  
Vol 65 (12) ◽  
pp. 2937-2952
Author(s):  
Urumu Tsunogai ◽  
Yuko Miyoshi ◽  
Toshiyuki Matsushita ◽  
Daisuke D. Komatsu ◽  
Masanori Ito ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Mesotrophic Lake

scholarly journals Elemental and Isotopic Characterization of Tobacco from Umbria

Metabolites ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 186
Author(s):  
Luana Bontempo ◽  
Daniela Bertoldi ◽  
Pietro Franceschi ◽  
Fabio Rossi ◽  
Roberto Larcher
Keyword(s):  
Stable Isotope ◽  
Economic Value ◽  
Isotope Ratios ◽  
Stable Isotope Ratios ◽  
Umbria Region ◽  
Geographical Regions ◽  
Isotopic Characterization ◽  
First Time ◽  
Micro Elements

Umbrian tobacco of the Virginia Bright variety is one of the most appreciated tobaccos in Europe, and one characterized by an excellent yield. In recent years, the Umbria region and local producers have invested in introducing novel practices (for production and processing) focused on environmental, social, and economic sustainability. Due to this, tobacco from Umbria is a leading commodity in the global tobacco industry, and it claims a high economic value. The aim of this study is then to assess if elemental and isotopic compositions can be used to protect the quality and geographical traceability of this particular tobacco. For the first time the characteristic value ranges of the stable isotope ratios of the bio-elements as a whole (δ2H, δ13C, δ15N, δ18O, and δ34S) and of the concentration of 56 macro- and micro-elements are now available, determined in Virginia Bright tobacco produced in two different areas of Italy (Umbria and Veneto), and from other worldwide geographical regions. The ranges of variability of elements and stable isotope ratios had slightly different results, according to the three geographical origins considered. In particular, Umbria samples presented significantly lower content of metals potentially dangerous for human health. The results of this first exploratory work highlight the possibility of characterizing tobacco from Umbria, and suggest widening the scope of the survey throughout Italy and foreign regions, in order to be used to describe the geographical origin of tobacco in general and verify the origin of the products on the market.

Characterization of the Geographical Origin of Pecorino Sardo Cheese by Casein Stable Isotope (13C/12C and15N/14N) Ratios and Free Amino Acid Ratios

2001 ◽  
Vol 49 (3) ◽  
pp. 1404-1409 ◽  
Author(s):  
Gavina Manca ◽  
Federica Camin ◽  
Gavina C. Coloru ◽  
Alessandra Del Caro ◽  
Daniela Depentori ◽  
...  
Keyword(s):  
Amino Acid ◽  
Stable Isotope ◽  
Free Amino Acid ◽  
Free Amino ◽  
Geographical Origin

Characterization of methane oxidation in a simulated landfill cover system by comparing molecular and stable isotope mass balances

2017 ◽  
Vol 69 ◽  
pp. 281-288 ◽  
Author(s):  
Marcel Schulte ◽  
Maik A. Jochmann ◽  
Tobias Gehrke ◽  
Andrea Thom ◽  
Tim Ricken ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Methane Oxidation ◽  
Mass Balances ◽  
Cover System ◽  
Landfill Cover ◽  
Landfill Cover System ◽  
Simulated Landfill

Determination of glycerol carbon stable isotope ratio for the characterization of Italian balsamic vinegars

2018 ◽  
Vol 69 ◽  
pp. 33-38
Author(s):  
Simona Sighinolfi ◽  
Ilaria Baneschi ◽  
Simona Manzini ◽  
Lorenzo Tassi ◽  
Luigi Dallai ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Isotope Ratio ◽  
Stable Isotope Ratio ◽  
Carbon Stable Isotope ◽  
Carbon Stable Isotope Ratio
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