• Isotopic reference materials are compounds (solids, liquids, gasses) with well-defined isotopic compositions and are the ultimate sources of accuracy in mass spectrometric measurements of isotope ratios. (wikipedia.org)
  • Due to their critical role in measuring isotope ratios, and in part, due to historical legacy, isotopic reference materials define the scales on which isotope ratios are reported in the peer-reviewed scientific literature. (wikipedia.org)
  • While the δ values of references are widely available, estimates of the absolute isotope ratios (R) in these materials are seldom reported. (wikipedia.org)
  • δ X = x / y R s a m p l e x / y R r e f e r e n c e − 1 {\displaystyle \delta ^{X}={\frac {^{x/y}R_{sample}}{^{x/y}R_{reference}}}-1} The δ values and absolute isotope ratios of common reference materials are summarized in Table 1 and described in more detail below. (wikipedia.org)
  • The reported isotopic ratios reflect the results from individual analyses of absolute mass fraction, aggregated in Meija et al. (wikipedia.org)
  • Analysis of stable isotope ratios from mineralised tissue has been widely used for dietary reconstruction. (springer.com)
  • Using the whiskers, researchers could do a stable isotope analysis to examine carbon nitrogen ratios. (nps.gov)
  • Korean mariculture Undaria pinnatifida was collected during the months of January, February, March, and December of 2010, as well as from January of 2011 to investigate the changes in the carbon and nitrogen stable isotope ratios (δ 13 C and δ 15 N) and heavy metal with respect to it growth and to identify the factors that influence such changes. (e-algae.org)
  • In this study, researchers analysed the zinc stable isotope ratios from animal and human teeth from two sites in the Huà Pan Province of Laos: Tam Pà Ling and the nearby site of Nam Lot. (sciencedaily.com)
  • With zinc stable isotope ratios, we can now study Tam Pà Ling and learn what kind of food our earliest ancestors in this region were eating. (sciencedaily.com)
  • The use of stable carbon and nitrogen isotope ratios will help determine these trophic linkages. (nova.edu)
  • collected from nonpolluted northwest coast was higher as compared to the average δ15N contents (8.0‰ air) of Ulva from the Manora Channel, suggesting that nitrogen isotopic ratios of Ulva spp. (intechopen.com)
  • Biogeochemical analysis of total mercury (tHg) and δ 13C/δ15N ratios in the bone collagen of archeologically recovered Pacific Cod ( Gadus macrocephalus ) bone shows high levels of tHg during early/mid-Holocene. (frontiersin.org)
  • Stable carbon and nitrogen isotope ratios (δ 13 C/δ 15 N) in the bone collagen and other hard tissues of marine species serve as proxies for primary productivity and food web interactions. (frontiersin.org)
  • Instead, they precisely measure carbon isotope ratios. (icr.org)
  • Experts must therefore convert the isotope ratios into "ages" using a series of formulas. (icr.org)
  • 2009 ). The strontium (Sr) isotope ratios in humans mirror the isotope composition of bioavailable Sr in the area where people resided, assuming that they consumed locally procured water and food. (springer.com)
  • Sjögren and Price 2013a ) has demonstrated a clear distinction between the Sr isotope ratios in the Cambro-Silurian and the Precambrian regions. (springer.com)
  • Measurements of isotopic ratios is an especially daunting undertaking, mainly because of the extreme weakness of the spectral signatures (emissions) of the less abundant species like carbon-13, nitrogen-15, etc. (eso.org)
  • While traditional stable isotope analyses of tooth enamel (e.g., carbon and oxygen) and trace element ratios (e.g. (blueskytccaalibaba.com)
  • In the second analysis, they evaluated ratios of carbon and nitrogen isotopes in whale muscle samples, an indicator providing information on which habitats the whales were feeding in. (phys.org)
  • This study examines carbon (δ 13 C) and nitrogen (δ 15 N) stable isotope ratios in growth rings of the anal fin spine and muscle tissue of swordfish from 3 different areas of the Eastern North Pacific Ocean (ENPO)-off Baja California Sur (Mexico) and California (USA), and in the North Pacific Subtropical Gyre (NPSG)-to assess swordfish movements between these areas. (int-res.com)
  • In the present study, 27 mandibular teeth (18 s molars, 6 first molars, and 3 premolars) collected from the Ajnala skeletal assemblage were processed for strontium isotope analysis, and the measured ratios were compared with published isotope baseline data to estimate the locality status of these remains. (bvsalud.org)
  • Stable isotope composition (delta(13)C and delta(15)N) of moose (Alces alces) and caribou (Rangifer tarandus) hair from the boreal forest of Jacques-Cartier Park and Cote-Nord (Quebec) and arctic tundra of Queen Maud Gulf and Southampton Island (Nunavut) was investigated as an indicator of dietary preferences and habitat use. (nih.gov)
  • In this study, we show that the nitrogen isotope composition of organic matter preserved in mammalian tooth enamel (δ 15 N enamel ) records diet and trophic position. (blueskytccaalibaba.com)
  • The strontium (Sr) isotope composition of human bones and teeth has been widely used to reconstruct an individual's geo-affiliation, residential mobility, and migration history. (bvsalud.org)
  • Internal water temperature, pH and H/D isotope composition. (lu.se)
  • Samples analysed by continuous flow isotope ratio mass spectroscopy. (elementallab.co.uk)
  • Isotopic abundances are commonly reported using the δ notation, which is the ratio of two isotopes (R) in a sample relative to the same ratio in a reference material, often reported in per mille (‰) (equation below). (wikipedia.org)
  • Stable isotopes of N ( 14 N, 15 N) are often used to trace the sources of N fueling aquatic primary production, but effective use of this approach requires obtaining a reliable isotopic ratio for phytoplankton. (usgs.gov)
  • The elemental analyzer produces carbon dioxide and nitrogen gas, which are analyzed for carbon and nitrogen isotopes in an isotope ratio mass spectrometer. (uwyo.edu)
  • Among samples with the same grow-out period, those that weighed more tended to have higher δ 13 C suggesting a close association between the carbon isotope ratio and growth rate of U. pinnatifida . (e-algae.org)
  • Nitrogen isotope ratio tended to be relatively lower when nitrogen content in the blade was higher, probably due to the strengthening of isotope fractionation stemming from plenty of nitrogen in the surrounding environment. (e-algae.org)
  • By analyzing them, researchers can determine a compound's isotopic signature, the unique ratio of various isotopes that serve as a fingerprint. (naturalnews.com)
  • We also need to assume a value for the carbon isotope ratio in the atmosphere at that time. (icr.org)
  • 2 This newer study measured the carbon isotope ratio in seeds of the same plant, but these were harvested and archived in 1947. (icr.org)
  • In contrast, the nitrogen (N) isotope ratio of organic material (expressed as δ 15 N vs. AIR in ‰, where δ 15 N = [( 15 N/ 14 N sample / 15 N/ 14 N reference ) − 1] × 1000) derived from bulk tissues or specific compounds (e.g., amino acids) is a widely used proxy for the dietary and trophic behavior of animals in terrestrial and marine food webs. (blueskytccaalibaba.com)
  • Another kind of analysis performed in this study -- stable carbon isotopes analysis -- indicates that the food consumed came strictly from forested environments," says Élise Dufour, researcher at the National Natural History Museum of Paris. (sciencedaily.com)
  • Human mobility patterns in Falbygden were studied by applying strontium isotope analysis combined with archaeological and bioarchaeological data, including mtDNA and sex assessment on a large dataset encompassing 141 individuals from 21 megalithic graves. (springer.com)
  • Without isotope references, measurements by mass spectrometry would be much less accurate and could not be used in comparisons across different analytical facilities. (wikipedia.org)
  • Isotope reference materials are generated, maintained, and sold by the International Atomic Energy Agency (IAEA), the National Institute of Standards and Technology (NIST), the United States Geologic Survey (USGS), the Institute for Reference Materials and Measurements (IRMM), and a variety of universities and scientific supply companies. (wikipedia.org)
  • The UoM research team took accurate measurements and interpretations of the oxygen isotopes that made up the organic matter in the space rocks. (naturalnews.com)
  • Measurements of naturally occurring stable isotopes in animal tissues can be used to monitor the diets of wide-ranging species, such as polar bears, that cannot be directly observed. (kansascityzoo.org)
  • To further investigate the meaning behind different burial practices within the same location and period, the authors of the present study analyzed the bone collagen carbon and nitrogen isotope measurements of 166 individuals from a series of broadly contemporary Late Neolithic (3500 to 2900 cal BC) mortuary monuments and caves, closely situated together in north-central Spain. (eurekalert.org)
  • Additionally, the human samples have higher stable isotope differences, in comparison with faunal samples, than would be expected within the food web, particularly for δ 13 C. This human bone collagen δ 13 C enrichment may reflect a diet rich in aquatic protein intake, which is also supported by δ 34 S archived in human and faunal samples, and the presence of oysters and cockles shells at the excavation. (springer.com)
  • This fractionation enables the use of stable nitrogen isotopes (δ 15 N) to infer trophic level, and high δ 15 N recorded in bone collagen usually indicates high-protein diets (Sponheimer et al. (springer.com)
  • Dental calculus is not equivalent to bone collagen for isotope analysis: a comparison between carbon and nitrogen stable isotope analysis of bulk dental calculus, bone and dentine collagen from same individuals from the Medieval site of El Raval (Alicante, Spain). (uv.es)
  • Palaeodietary reconstruction using the carbon and nitrogen isotope values of bone and dentine collagen is a well-established method and the biochemical processes involved are well known. (uv.es)
  • Researchers have recently explored using bulk samples of dental calculus as a substitute for bone and dentine collagen in dietary analyses, because calculus can be sampled without causing damage to the teeth, and may be useful in situations where more destructive analyses are not possible, or where collagen is poorly preserved. (uv.es)
  • Most importantly, there have been no comparative studies of collagen and calculus isotope values, which are necessary to establish the value of bulk calculus as a source of accurate isotope values. (uv.es)
  • Here we report the comparison of carbon and nitrogen stable isotope analyses of bulk calculus to those from bone and dentine collagen. (uv.es)
  • These analyses have been performed on individuals from the El Raval Mudéjar Medieval Cemetery (Eastern Iberia, 15th century A.D.). Although calculus isotope values may be broadly similar to expected values at the population level, we report here no correlation between collagen and bulk dental calculus values at the individual level. (uv.es)
  • Salazar García, Domingo Carlos Richards, M.P. Nehlich, O. Henry, A.G. 2014 Dental calculus is not equivalent to bone collagen for isotope analysis: a comparison between carbon and nitrogen stable isotope analysis of bulk dental calculus, bone and dentine collagen from same individuals from the Medieval site of El Raval (Alicante, Spain). (uv.es)
  • Dietary Stable Isotope Analysis (carbon and nitrogen) of bone collagen reveals aspects of past diet. (york.ac.uk)
  • However, the collagen in bones and teeth needed to do these analyses is not easily conservable. (sciencedaily.com)
  • In particular, the high δ 15 N of the immature birds in the northeastern area seems to be caused by feeding on 15 N rich diets in the eastern tropical Pacific, off Peru and California, during the northward migration, where occurrence of denitrification with a high nitrogen isotope fractionation factor of up to 1.04 is well known. (int-res.com)
  • An international team of scientists has now applied a new method to investigate the diet of fossil humans: the analysis of stable zinc isotopes from tooth enamel. (sciencedaily.com)
  • Each of the major stable isotope systems (hydrogen, carbon, oxygen, nitrogen, and sulfur) has a wide variety of references encompassing distinct molecular structures. (wikipedia.org)
  • This can mean a material that historically defined an isotopic scale, such as Vienna Standard Mean Ocean Water (VSMOW) for hydrogen isotopes, even if that material is not currently in use. (wikipedia.org)
  • Earlier studies targeted the isotopes of hydrogen and nitrogen. (naturalnews.com)
  • However, oxygen isotopes have two advantages over their hydrogen and nitrogen counterparts. (naturalnews.com)
  • Whereas both hydrogen and nitrogen have two, oxygen has three stable isotopes . (naturalnews.com)
  • Stable isotopes of carbon (δ13C), sulfur (δ34S), oxygen (δ18O), hydrogen (δ2H), nitrogen (δ15N), and radioactive isotope of hydrogen (tritium) have been applied in combination with conventional techniques (chemical) to investigate Karachi coastal water pollution due to Layari and Malir rivers, which mainly carry the domestic and industrial wastewater of Karachi Metropolitan. (intechopen.com)
  • Naturally occurring isotopes (tritium, carbon-13, carbon-14 [abundance], stable isotopes of hydrogen and oxygen in water, stable isotopes of nitrogen and oxygen in nitrate, chlorine-37, and bromine-81), and dissolved noble gases also were measured to help identify the source and age of the sampled ground water. (usgs.gov)
  • He and his research team studied the oxygen isotopes in the matter. (naturalnews.com)
  • This veritable wealth of oxygen isotopes provides more information about the origin of organic material in chondrites. (naturalnews.com)
  • Tartèse reported that the three oxygen isotopes formed a pattern that resembled the ones found in the Sun, asteroids, and rocky planets . (naturalnews.com)
  • The model consists of a set of mass balance equations for organic substances, ammonium nitrogen, oxidized nitrogen, dissolved oxygen, alkalinity, biomass, and disinfectants in the bulk liquid phase and within the biofilm under laminar and turbulent flow conditions. (who.int)
  • The determination of serum urea nitrogen is the most widely used test for the evaluation of kidney function. (cdc.gov)
  • Isotopes are atoms of an element that contain different numbers of neutrons compared to the baseline atoms. (naturalnews.com)
  • A recent Sr isotope baseline (Blank et al. (springer.com)
  • There is very little Indian data on the bioavailable strontium, so the inferences from the present study estimating Sr isotope abundances are expected to provide baseline data for future forensic provenance studies that will contribute to the global efforts of mapping Sr isotope variations by the isotope community. (bvsalud.org)
  • Our results suggest that the cause is the preservation of unstable single nitrogen atoms preserved inside the diamonds," explained Lai, who conducted this research as part of her master's studies in the Diamond Exploration Research Training School under the supervision of Stachel. (ualberta.ca)
  • Methods were developed for the on-line analysis of stable isotopes of nitrogen (at natural abundance levels) in NH 3 , NO and NO 2 in order to study the contribution of these trace gases to nitrogen cycling in ecosystems. (uni-bayreuth.de)
  • Anthropogenic alteration of the form and concentration of nitrogen (N) in aquatic ecosystems is widespread. (usgs.gov)
  • This study underlines the potential of isotopic analysis for studies on diet and habitat selection within a pure C(3) plant environment. (nih.gov)
  • It is not yet clear how much of an individual¿s life span dental calculus represents, what portions of the diet it records, and how diagenesis effects the carbon and nitrogen isotope values of this material. (uv.es)
  • Findings from this analysis suggested that ancient Egyptians followed a mostly vegetarian diet [8] . (researchgate.net)
  • Modern elemental isotopic analysis informed of the type of diet that ancient Egyptians consumed [8] . (researchgate.net)
  • Juxtaposing the results of this isotopic analysis with the present-day Egyptians' diet, cognate findings Fig. 11 Present-day kariesh cheese originated in ancient Egypt between 3200 and 332 BC. (researchgate.net)
  • When we compare the zinc isotope values from the fossil Homo sapiens of Tam Pà Ling to that of the animals, it strongly suggests that its diet contained both plants and animals. (sciencedaily.com)
  • This omnivorous diet also differs from most nitrogen isotope data of humans in other regions of the world for that time period, where a meat-rich diet is almost consistently discerned. (sciencedaily.com)
  • We will explore the utility of using stable isotopes to understand changes in the distribution, diet, and migration patterns of polar bears in the Southern Beaufort Sea. (kansascityzoo.org)
  • The researchers' isotopic analysis of both megalithic graves and caves suggests a similar C3 plant-based human diet, mostly consisting of wheat and barley, as well as a substantial amount of protein from cattle and sheep. (eurekalert.org)
  • The analysis suggests that changing levels of nitrogen and carbon were incorrectly interpreted in the past as indicators of a high status rich diet, and that the changing levels are in fact evidence of body tissue breaking down and being recycled. (irishcentral.com)
  • Beak analysis from cephalopod remains showed the diet of pygmy sperm whales to be more diverse than that of the dwarf species, the researchers report, and prey sizes were slightly larger for the pygmy than for the dwarf, but not statistically significantly so. (phys.org)
  • The team extracted and sent for radiocarbon analysis small seeds from the track-bearing sediments. (icr.org)
  • However, he adds the analysis can provide clues to the current health of an ecosystem, such as a forest or swamp. (uwyo.edu)
  • Their skeletal remains, preserved in archeological deposits, offer, through biogeochemical analyses, the potential to reflect past ecosystem changes and a window into climate-related impacts on marine food webs. (frontiersin.org)
  • These isotopes are increasingly being used to understand changes in ecosystem structure. (kansascityzoo.org)
  • Using stable isotopes of carbon and nitrogen preserved in these two tissues, we will examine ecosystem dynamics relative to sea ice conditions, climate indices, and population trends. (kansascityzoo.org)
  • This work facilitates ecosystem-related analyses that align with IATTC's responsibilities mandated by the Antigua Convention. (iattc.org)
  • The University of Wyoming Stable Isotope Facility (SIF) is now the go-to laboratory to analyze soil samples from all across the country. (uwyo.edu)
  • 2010). Food-web inferences of stable isotope spatial patterns in copepods and yellowfin tuna in the pelagic eastern Pacific Ocean . (oregonstate.edu)
  • Published in the journal Biology 's special issue, Applications of Stable Isotope Analysis in Ecology, Dr. Jack Hopkins, President and Associate Professor of the Center for Wildlife Studies and colleagues describe a novel technique to prevent laundering one of Maine's imperiled species, the wood turtle. (eurekalert.org)
  • This study is the first of its kind to analyse carbon, nitrogen and sulphur stable isotope data from skeletons of the eleventh-seventeenth centuries in Portugal. (springer.com)
  • Richards and Hedges 1999 ), especially when combined with carbon isotope data. (springer.com)
  • Several questions remain about the use of bulk calculus as a source of carbon and nitrogen isotope data, however. (uv.es)
  • It will be interesting, in the future, to compare our zinc isotope data with data from other prehistoric human species of Southeast Asia, like Homo erectus and Homo floresiensis , and see if we could understand better why they went extinct while our species survived," concludes first author Nicolas Bourgon, a researcher at the Max Planck Institute for Evolutionary Anthropology. (sciencedaily.com)
  • Data analyses will include single and multiple analyses of variance (ANOVA, MANOVA), and non-parametric statistics. (nova.edu)
  • Assessing attribute redundancy in the application of productivity-susceptibility analysis to data-limited fisheries. (iattc.org)
  • The high quality of the data obtained of this moving 9th-magnitude object has permitted a determination of the cometary abundance of various elements and their isotopes [2] . (eso.org)
  • Quality-control samples (blanks or replicates, or samples for matrix spikes) were collected from approximately 26 percent of the wells, and the analyses of these samples were used to evaluate the quality of the data for the ground-water samples. (usgs.gov)
  • The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. (eurekalert.org)
  • The results of surveys, analyses, and studies are made known through a number of data release mechanisms including publications, mainframe computer data files, CD-ROMs (Search and Retrieval Software, Statistical Export and Tabulation System (SETS)), and the Internet (http://www.cdc.gov/nchswww/nchshome.htm). (cdc.gov)
  • This is the conclusion reached by Russian, Italian and German researchers based on the results of analyses of peat profiles taken from the disaster region. (spacedaily.com)
  • With the help of DNA analyses, in 2014 researchers were able to reveal that these farmers arrived as immigrants from the Middle East. (lu.se)
  • Thus, the strontium isotope results reveal that the Ajnala individuals did not grow up or live in the Amritsar region during their childhood, and this observation complemented the previous forensic anthropological and molecular findings. (bvsalud.org)
  • UW's Stable Isotope Facility recently received an NSF contract to analyze soil samples for the entire NEON network across the United States. (uwyo.edu)
  • All soil samples are being sent to UW for carbon and nitrogen isotope analysis. (uwyo.edu)
  • New technology introduced to the Canadian Center for Isotopic Microanalysis at the University of Alberta (Canadian Foundation for Innovation) allows fine-scale (1-30 microns) in situ sampling of isotopes within samples (i.e., hair and claws). (kansascityzoo.org)
  • In peat samples corresponded to 1908 permafrost boundary they found significantly higher levels of the heavy nitrogen and carbon isotopes 15N and 13C. (spacedaily.com)
  • In 2021, the Thünen Institute produced around 1,000 in-depth reports on timber and 10,000 analyses of individual samples. (nationalgeographic.com)
  • Confirmation of GC analysis is typically accomplished using gas chromatography with mass spectroscopy (GC-MS). The preparation of samples for GC analysis typically involves sample extraction with an organic solvent (e.g., hexane or diethyl ether) and purification of the extract (e.g., by column chromatography or further extraction). (cdc.gov)
  • However, since alkyl phosphates such as malathion are rapidly metabolized in the body and their metabolites are excreted in urine within a short time (24-36 hours), urine samples for analysis must be collected quickly. (cdc.gov)
  • Some also volunteered for the analysis team that helped examine the scat contents, a one- to two-day commitment per month. (nps.gov)
  • We used oceanographic modeling, acoustic tracking technology and stable isotope analyses to examine basic research questions for rockfish in Puget Sound. (noaa.gov)
  • In 2015, we worked with the USGS climate study team to obtain a core from White Pond suitable for precise dating and analysis of the lower YDB. (nature.com)
  • New methods -- such as zinc isotope analysis of enamel -- can now overcome these limitations and allow us to investigate teeth from regions and periods we could not study before," says study leader Thomas Tütken, professor at the Johannes Gutenberg University's Institute of Geosciences. (sciencedaily.com)
  • An isotopic analysis of megalithic graves and caves in Spain may suggest the existence of a degree of differentiation in the lifeways of people buried in these different funerary sites, according to a study published September 27, 2017 in the open-access journal PLOS ONE by Teresa Fernández-Crespo and Rick Schulting from the University of the Basque Country, Spain, and the University of Oxford, UK. (eurekalert.org)
  • However, the study surprisingly reveals significant carbon isotope differences between people interred in both funerary site-types. (eurekalert.org)
  • Using carbon and nitrogen stable isotope analysis of human and animal remains, our study has identified meaningful differences between those buried in caves and megalithic graves in the Late Neolithic of north-central Spain," says Teresa Fernández-Crespo. (eurekalert.org)
  • The study design and analyses were based on Parts 2 and 3 of the 2018 IFCC Commutability in Metrological Traceability Working Group's Recommendations for Commutability Assessment. (cdc.gov)
  • Nuclear techniques in the study and control of parasitic diseases of livestock : proceedings of the Final Research Co-ordination Meeting on the Use of Nuclear Techniques in the Study and Control of Parasitic Diseases of Farm Animals, held in Vienna from 11 to 14 May 1987 / organized by the Joint FAO/IAEA Division of Isotope and Radiation Applications of Atomic Energy for Food and Agricultural Development. (who.int)
  • 2007). This study found that AM accounted for only 2-12% of the detected metabolites, that most of the subjects had detectable atrazine exposure, and that future biomonitoring studies would likely need to include analysis of at least AM, DACT, DIA, and DEA in order to characterize the extent of atrazine exposure in a population. (who.int)
  • Differences between the anal fin spine and muscle were found, but interpreting these isotopic differences requires information on tissue-specific isotope turnover rates. (int-res.com)
  • All searches were performed and analyzed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) methodology and were conducted during August 2022. (bvsalud.org)
  • The application of strontium isotope analyses for estimating geolocation of archeological remains is of great interest in bioarcheology and modern forensics. (bvsalud.org)
  • Despite the potential of nitrogen isotopes for trophic reconstruction, their application in the paleontological record has been limited due to the poor preservation of N-containing organic matter. (blueskytccaalibaba.com)
  • Using a stable isotope mixing model approach, we estimated that in the presence of effluent between 40 and 90 % of phytoplankton N was derived from NH 4 + after 3 days of downstream transport. (usgs.gov)
  • To develop the model, co-authors Drs. Matt Chatfield and Cheryl Frederick collected claw tips from 35 wild wood turtles in Maine and compared their isotopes with those of 36 captive turtles throughout the eastern U.S. Because captive and wild turtles have drastically different diets, the isotopic signatures of their tissues were also expected to differ. (eurekalert.org)
  • Combined analyses of mercury, nitrogen, and carbon isotopes in archived lake trout (Salvelinus namaycush) tissues and sediment cores in Lake Michigan from 1978 to 2012 indicated that lake trout mercury concentrations mirrored declines in mercury sources prior to the arrival of invasive species that changed mercury transfer through the food and dampened the expected decreases in mercury. (usgs.gov)
  • We examined the natural variability of carbon and nitrogen isotopes in the symbiotic sea anemone Anemonia viridis to investigate dietary shifts (autotrophy/heterotrophy) along a natural p CO 2 gradient at the island of Vulcano, Italy. (nature.com)
  • Stable isotope analysis (N and C) of fossil cereal grains is regularly explored as a means of obtaining insights to past crop growing conditions and agricultural practices. (lu.se)
  • As a result, we recommend that carbon and nitrogen analysis on bulk dental calculus should only be used as a last resource archaeological dietary marker, if at all. (uv.es)
  • Knowledge of the abundance of the stable isotopes [2] of the light elements in different solar system objects provides critical clues to the origin and early evolution of these objects and of the system as a whole. (eso.org)
  • Together, the zinc and carbon isotope results may suggest a mix of specialized adaptations to tropical rainforests seen from other Southeast Asian archaeological sites. (sciencedaily.com)
  • Stable isotope methods for provenance of unidentified human remains are relatively a newer field of enquiry in forensic archeology. (bvsalud.org)
  • Migratory dynamics and dietary change of sooty shearwaters Puffinus griseus sampled in the North Pacific from May to September in 1990 and 1991 were investigated using the method of δ 13 C and δ 15 N analyses. (int-res.com)
  • Nitrogen isotope analysis, in particular, can help scientists learn if past humans were eating animals or plants. (sciencedaily.com)
  • The children ranged in age from 5 to 14 and were generally in good health , according to an analysis of their bones and teeth. (livescience.com)
  • Changing levels of nitrogen and carbon in teeth evidence of starving body breaking down and consuming itself. (irishcentral.com)
  • The Guardian reports that the research is the first time analysis of the stable isotopes of nitrogen and carbon in human teeth has been used to establish markers for starvation. (irishcentral.com)
  • We will also use more conventional methods of whole hair and nail analysis to develop monitoring methods for polar bear population status. (kansascityzoo.org)
  • Rather, the intention is to identify well-established methods that are used as the standard methods of analysis. (cdc.gov)
  • We return to our previous questions to find new answers with the help of osteological methods - DNA and isotope analyses", says Torbjörn Ahlström, Professor of Historic Osteology. (lu.se)
  • Thus, the geological conditions of Falbygden provide an ideal setting for mobility studies based on Sr isotopes. (springer.com)