Quantitative speciation analysis for thein vivostudy of iron metabolism and bioavailability from formula milk fortified with stable isotope enriched iron oxo-hydroxide nanoparticles

2019 ◽  
Vol 34 (4) ◽  
pp. 774-781
Author(s):  
Rafaella Regina Alves Peixoto ◽  
Sonia Fernández-Menéndez ◽  
Belén Fernández-Colomer ◽  
Solange Cadore ◽  
Alfredo Sanz-Medel ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Iron Metabolism ◽  
Speciation Analysis ◽  
Iron Isotope ◽  
Formula Milk ◽  
First Time

For the first time, the study of iron metabolism and bioavailability, administered as stable iron isotope enriched nanoparticles, was carried out by speciation analysis.

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.

scholarly journals A Novel Method for the Quantification of Quinic Acid in Food Using Stable Isotope Dilution Analysis

2009 ◽  
Vol 92 (3) ◽  
pp. 730-733 ◽  
Author(s):  
Thomas Erk ◽  
Hannah Bergmann ◽  
Elke Richling
Keyword(s):  
Stable Isotope ◽  
Isotope Dilution ◽  
Quinic Acid ◽  
Isotope Dilution Analysis ◽  
Red Wines ◽  
Stable Isotope Dilution Analysis ◽  
Selective Method ◽  
Stable Isotope Dilution ◽  
Novel Method ◽  
First Time

Abstract Organic acids play an important role in the flavor and taste of plant-derived foods. Quinic acid (QA) is one of the major acids. In the past, several methods like HPLC/UV, GC, and capillary electrophoresis were used for identification and quantification of QA. For the first time, a novel, sensitive, and selective method for the quantification of QA in food using stable isotope dilution analysis with HPLC/MS/MS has been established. Uniformly labeled 13C-QA was used as a standard to reduce sample preparations and to overcome matrix and ionization effects. The method was used to determine the QA content of red wines, instant coffees, and cloudy apple juices. QA contents of instant coffees were 64.4 and 63.6 g/kg powder. The concentrations in red wines were 24.0 and 25.1 mg/L, and 1493.3 and 1705.2 mg/L in cloudy apple juices.

Stable Isotope Dietary Analysis on Human Remains: A case Study at Khirbet Aqabet Al Qadi Burial Chamber, Nablus, Palestine

Radiocarbon ◽  
2019 ◽  
Vol 61 (4) ◽  
pp. 1107-1120
Author(s):  
Loay Abu Alsaud ◽  
Awni Shawamra ◽  
Amer Qobbaj ◽  
Jehad Yasin ◽  
Mohammad Al-Khateeb ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Isotope Analysis ◽  
Human Remains ◽  
City Center ◽  
Dietary Analysis ◽  
Agricultural Use ◽  
First Time ◽  
The City

ABSTRACTIn 2016, a burial chamber hewn into limestone was discovered at Khirbet Aqabet Al Qadi on the northwestern slope of Mount Ebal, 2km north of the city center of Nablus. The floor of the chamber is 3.15 × 2.9 m and the height averages 1.8 m. A movable closure at the entrance consists of a limestone slab. The burial chamber houses four sarcophagi. The aim of this case study is to give information not only on the burial chamber but also, for the first time in the region, on human remains. Stable isotope analysis of a human bone sample enabled us to obtain dietary information on one individual. Due to low collagen content, the sample did not allow precise dating but it can be placed between 50 BC and 50 AD. Systematic illegal excavation and looting at funerary sites in the Nablus area has caused material for potential information to be missing at the site. Nonetheless, the dietary information obtained supports other material finds indicating Mediterranean agricultural use of the land. Our evidence demonstrates that the site dates to between the 1st and 3rd centuries AD.

scholarly journals Chemical Speciation of Aluminum in Wine by LC–ICP–MS

Molecules ◽  
2020 ◽  
Vol 25 (5) ◽  
pp. 1069 ◽  
Author(s):  
Katarzyna Karaś ◽  
Anetta Zioła-Frankowska ◽  
Marcin Frankowski
Keyword(s):  
Ph Value ◽  
Human Life ◽  
Daily Intake ◽  
Speciation Analysis ◽  
Gradient Elution ◽  
Molar Ratio ◽  
Molar Ratios ◽  
Icp Ms ◽  
Chemical Equilibrium Modeling ◽  
First Time

Aluminum is very common in the natural environment and in everyday human life. We are living in the “aluminum age.” Its average daily intake should not exceed a few mg/day. Unfortunately, despite the growing number of alarming data about the toxicity of this element, human exposure to aluminum is constantly increasing. The toxicity and bioavailability of aluminum depends mainly on the form in which it occurs. The main variables conditioning the form are the concentration, the type, the molar ratio of aluminum to ligand, the pH value, and the temperature. This research presents a new method for speciation analysis of both inorganic and organic aluminum complexes in model solutions by LC–ICP–MS. Different solutions with variable pH values and different Al/ligand molar ratios (fluorides and several organic ligands, e.g., citrates and oxalates ions) were used. The chromatographic separation process was carried out based on isocratic and gradient elution, using a cation exchange analytical column. All determinations have been confirmed based on chemical equilibrium modeling programs. The new developed method was successfully applied for the first time in speciation analysis of real samples: white and red wine.

scholarly journals Lekking birds in a tropical forest forego sex for migration

2011 ◽  
Vol 7 (5) ◽  
pp. 661-663 ◽  
Author(s):  
W. Alice Boyle ◽  
Christopher G. Guglielmo ◽  
Keith A. Hobson ◽  
D. Ryan Norris
Keyword(s):  
Sexual Selection ◽  
Life History ◽  
Stable Isotope ◽  
Annual Variation ◽  
Previous Evidence ◽  
Trade Offs ◽  
Breeding Migration ◽  
First Time ◽  
Natural And Sexual Selection ◽  
Isotope Measurements

Facultative, partially migratory animals provide a contemporary window into the evolution of migration, offering rare opportunities to examine the life-history trade-offs associated with migration. For the first time, to our knowledge, we describe the nature of these trade-offs, using a lek-breeding tropical bird, the white-ruffed manakin ( Corapipo altera ). Previous evidence indicated that weather drives post-breeding migration to lower elevations bringing condition-related benefits. Using elevation-sensitive stable isotope measurements and more than 1200 h of behavioural observations, we show that male manakins which migrate incur costs of diminished social status and matings with females the following breeding season. Because migratory tendency depends on inter-annual variation in weather, physical costs of displays and breeding prospects the following year, migratory decisions are subject to both natural and sexual selection, with the outcome of such decisions linked to changing climatic regimes.

scholarly journals Pleistocene ice at the bottom of the Vavilov ice cap, Severnaya Zemlya, Russian Arctic

1996 ◽  
Vol 42 (142) ◽  
pp. 403-406 ◽  
Author(s):  
Michel Stiévenard ◽  
Vladimir Nikolaëv ◽  
Dmitri Yu Bol’shiyanov ◽  
Christine Fléhoc ◽  
Jean Jouzel ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Isotope Composition ◽  
Russian Arctic ◽  
Stable Isotope Composition ◽  
The Core ◽  
Ice Cap ◽  
Basal Ice ◽  
Glacier Ice ◽  
Severnaya Zemlya ◽  
First Time

AbstractThe Vavilov ice cap was perforated in 1988 by a drilling which reached the underlying frozen sediments. In contrast to the overlying glacier ice, the basal ice is composed of different ice layers with a variable debris load. The stable-isotope composition of these layers shows δ values much lower than everywhere else in the core or in the Vavilov ice cap. This is most probably the signature of a remnant of Pleistocene ice which, for the first time, is shown to occur in the Russian Arctic.

Recent Advances in Mercury Speciation Analysis with Focus on Spectrometric Methods and Enriched Stable Isotope Applications

AMBIO ◽  
2007 ◽  
Vol 36 (6) ◽  
pp. 443-451 ◽  
Author(s):  
Erik Björn ◽  
Tom Larsson ◽  
Lars Lambertsson ◽  
Ulf Skyllberg ◽  
Wolfgang Frech
Keyword(s):  
Stable Isotope ◽  
Speciation Analysis ◽  
Mercury Speciation ◽  
Recent Advances

scholarly journals Saurichthys (Pisces, Actinopterygii) teeth from the Lower Triassic of Spitsbergen, with comments on their stable isotope composition (δ13C and δ18O) and X−ray microtomography

2013 ◽  
Vol 34 (1) ◽  
pp. 23-38 ◽  
Author(s):  
Błażej Błażejowski ◽  
Christopher J. Duffin ◽  
Piotr Gieszcz ◽  
Krzysztof Małkowski ◽  
Marcin Binkowski ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Isotope Composition ◽  
Isotope Analysis ◽  
Lower Triassic ◽  
X Ray ◽  
Tooth Histology ◽  
Fish Remains ◽  
First Time ◽  
Fish Teeth ◽  
Non Destructive

Abstract A rich collection of exceptionally preserved Lower Triassic fossil fish remains obtained during the Polish Spitsbergen Expedition of 2005 includes many isolated teeth be− lieved to belong to a saurichthyid actinopterygian. Stable isotope analysis (δ13C and δ18O) of putative Saurichthys teeth from the Hornsund area (South Spitsbergen) acting as a paleoenvironmental proxy has permitted trophic−level reconstruction and comparison with other Lower Triassic fish teeth from the same location. The broader range of δ13C values ob− tained for durophagous teeth of the hybodont selachian, Lissodus, probably reflects its mi− gratory behaviour and perhaps a greater feeding diversity. X−ray microcomputed tomogra− phy (XMT), a non−destructive technique, is used for the first time in order to elucidate de− tails of tooth histology, the results of which suggest that the method has considerable poten− tial as a future analytical tool.

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