ライフサイエンスコーパス: isotope ratio

1 n-era Gale crater smectite to determine this isotope ratio.

2 ized by a distinctive combination of H and O isotope ratios.

3 nants needed for accurate measurement of the isotope ratios.

4 bank) are the major determinants of measured isotope ratios.

5 the online IEC MC-ICPMS determination of Si isotope ratios.

6 ferentiate sources of contamination based on isotope ratios.

7 ly given the enriched nature of their carbon isotope ratios.

8 stack at the peak of production, and (3) Pb isotope ratios.

9 h Element (REE) concentrations with Sr-Nd-Pb isotope ratios.

10 system, small shifts of carbon and chlorine isotope ratios (+0.8 per thousand) were observed across

11 Carbon isotope ratio ((13)C/(12)C=delta(13)C) of 100 pine honey

12 Stable isotope ratios ((13)C/(12)C and (15)N/(14)N) of South Af

13 Stable isotope ratios ((13)C/(12)C and (15)N/(14)N) of South Af

14 Nitrogen (N) isotope ratios ((15)N/(14)N) provide integrative constra

15 Stable nitrogen isotope ratios ((15)N/(14)N, delta(15)N) are of particul

16 ple, sensitive, and robust method for sulfur isotope ratio ((34)S/(32)S) analysis of ppm-level organi

17 ic DMS to aerosols we established the sulfur isotope ratios ((34)S/(32)S ratio, delta(34)S) of DMS an

18 This diffusion model predicted the unusual isotope ratio (6)Li(+)/(7)Li(+) profile measured by TOF-

19 ry indicators, including boron and strontium isotope ratios, along with groundwater tritium-helium an

20 For the case of Cu and Zn isotope ratio analyses, the same mass concentration of S

21 identify these adulterations, stable carbon isotope ratio analysis (SCIRA) was performed on the mode

22 C 998.12, 2005) and Internal Standard Carbon Isotope Ratio Analysis could not efficiently detect the

23 Stable isotope ratio analysis is increasingly being applied as

24 ld be differentiated in shrimps using stable isotope ratio analysis of carbon and nitrogen and/or mul

25 spectrometry (HT-LC/PDA/IRMS) for the carbon isotope ratio analysis of unconjugated steroids.

26 Quantification is performed by isotope ratio analysis with fully (13)C-labeled biomass

27 Isotope ratios and percentage composition for C and N we

28 r calibration of the relationship between Cr isotope ratios and the extent of Cr(VI) reduction and ai

29 Here we report SIMS U-Pb and O isotope ratios and trace element analyses for two ~4100

30 The measured U isotope ratios and U concentration in the hair, toenail,

31 mono isotopic ion and up to three isotopes, isotope ratios, and a peak/noise filter.

32 sociated with metabolism shape tissue stable isotope ratios, and as such the spacing between stable i

33 were studied using nutrient analysis, stable isotope ratios, and isotope tracer experiments.

34 Molybdenum (98)Mo/(95)Mo isotope ratios are a sediment paleo proxy for the redox

35 It can be shown that the isotope ratios are correlated with the altitude and prec

36 ghly resolved data of both concentration and isotope ratios are needed for unique process identificat

37 mber of the populations and their respective isotope ratios are unknown.

38 Derived isotope ratios are used to reconstruct external dose rat

39 The method also has a potential for stable isotope ratio as well as chemical analysis to find indic

40 the possibilities of using zinc (Zn) stable isotope ratios as dietary indicators, we report here on

41 opy to determine the bulk (13)C/(12)C carbon isotope ratio, at natural abundance, in inorganic carbon

42 This work aims to employ an (18)O-isotope ratio-based analytical method for quantitative e

43 ellular metabolites were quantified using an isotope-ratio-based approach.

44 We also compared isotope ratios between glacial-marine and more oceanic h

45 For isotope ratios, blank correction is commonly performed e

46 erved in the (235)U/(238)U and (236)U/(238)U isotope ratios but not the (234)U/(238)U.

47 benthic to pelagic prey was evident in liver isotope ratios, but muscle isotope ratios indicated a ye

48 the measured (63)Cu/(65)Cu and (64)Zn/(66)Zn isotope ratios by -0.036 per thousand to -0.95 per thous

49 onstrates the nonlinear behavior of hydrogen isotope ratios caused by anaerobic ethylbenzene hydroxyl

50 ark is famous for its high helium-3/helium-4 isotope ratio, commonly cited as evidence for a deep man

51 sion of organic analytes to H(2) in hydrogen isotope ratio compound-specific isotope analysis (CSIA)

52 Analyses of stable metal isotope ratios constitute a novel tool in order to impro

53 The hydrogen isotope ratio (D/H) is commonly used to reconstruct the

54 The isotope ratios delta(1)(3)C and delta(1)(5)N may both se

55 nce ion chromatography (HPIC), carbon stable isotope ratio (delta(13)C) by isotope ratio mass spectro

56 s used to simultaneously determine carbon 13 isotope ratio (delta(13)C) of organic acids, glucose and

57 Nitrogen stable isotope ratio (delta(15)N) in Greenland snow nitrate and

58 tracer of past rainfall by analysing carbon isotope ratios (delta(13) C) of modern leaves.

59 ci inferred from studies reporting C stable isotope ratios (delta(13) C) or photosynthetic discrimin

60 one and enamel apatite rely mainly on carbon isotope ratios (delta(13)C) and to a lesser extent on st

61 Serial carbon isotope ratios (delta(13)C) in canine enamel from indivi

62 set of carbon, hydrogen, and chlorine stable isotope ratios (delta(13)C, delta(2)H, delta(37)Cl) of i

63 Nitrogen stable isotope ratios (delta(15) N) may be used to estimate com

64 Stable nitrogen isotope ratios (delta(15)N) were used as a measure for t

65 mal oscillatory zonation and constant oxygen isotope ratios (delta(18)O = 5.8 to 6.0 per thousand).

66 Here we used phosphate oxygen isotope ratios (delta(18)O(P)) in concert with sediment

67 Stable magnesium isotope ratios (delta(26)Mg) also meet these criteria bu

68 the body size of goslings as well as stable isotope ratios (delta(34) S, delta(15) N and delta(13) C

69 Calcium isotope ratios (delta(44)Ca) meet these criteria but exh

70 uous tooth enamel as marked variations in Ca isotope ratios (delta(44/42)Ca).

71 resolution transect of dissolved stable iron isotope ratios (delta(56)Fe) and iron concentrations ([F

72 Copper (Cu) stable isotope ratios (delta(65)Cu) have recently been used as

73 e followed by increased sedimentary N stable isotope ratios (delta15N) and bulk density, and decrease

74 gnificant differences in carbon and nitrogen isotope ratios, demonstrating a further potential to tra

75 Accurate isotope ratio determination of (12)CO2 and (13)CO2 in ex

76 The isotope ratios disclosed the majority of the females to

77 Hence, the O isotope ratios documented here for trinitite melt glass

78 r method enables determination of diclofenac isotope ratios down to the sub-mugL(-1) range in environ

79 predict the evolution of carbon and chlorine isotope ratios during degradation of chlorinated hydroca

80 delta(2)H and Deltadelta(13)C are changes in isotope ratios during degradation) resulted in clearly d

81 hat contains the measurements of (18)O/(16)O isotope ratios during oxygen-18 isotopic exchange betwee

82 air-water partitioning, carbon and chlorine isotope ratios evolved in opposite directions, with a no

83 colour and reflectance measurements, stable isotope ratios, fatty acids, beta-carotene, lutein and a

84 At the same time the delta(18)O isotope ratio fell within legal limits when the final et

85 chlorinated biomolecules by the use of mass isotope ratio filters followed by the identification of

86 re was evidence from distribution and stable isotope ratios for differences in habitat use and diving

87 Based on the Pb isotope ratios for the red inclusions within Trinitite,

88 Significant variations in Si isotope ratios from -0.72 +/- 0.09 to -0.24 +/- 0.03 per

89 tissue rely on predictable offsets of stable isotope ratios from diet to tissue.

90 a new climate proxy based on paired hydrogen isotope ratios from microalgal and mangrove-derived sedi

91 Carbon isotope ratios from terrestrial plant wax biomarkers dep

92 We interpret our record of oxygen isotope ratios from the shells of the long-lived marine

93 Carbon isotope ratios, geographical and climate data, fossil re

94 Multi-element stable isotope ratios have been assessed as a means to distingu

95 Carbon and hydrogen isotope ratios have been used to better constrain the so

96 Se isotope ratios help to trace biochemical processes of Se

97 ully adopted to characterize the (13)C/(12)C isotope ratio in inorganic carbonates and bicarbonates w

98 Previous measurements of the Lu isotope ratio in rock samples have not been of sufficien

99 ique designed to measure the (176)Lu/(175)Lu isotope ratio in rock samples to a precision of ~0.1 per

100 We measured the stable nitrogen isotope ratio in the forages and in the longissimus thor

101 ion in precipitation over the Amazon: oxygen isotope ratios in annual rings in tropical cedar (Cedrel

102 icrofossil foraminifera abundance and stable isotope ratios in deep sea sediments from Ocean Drilling

103 We use stable isotope ratios in feces of wild mountain gorillas (Goril

104 We suggest that the stable Hg isotope ratios in fish can be used to trace environmenta

105 paired analysis of deuterium/hydrogen (D/H) isotope ratios in fossil alkenones, salinity increased r

106 e therefore explore the utility of Hg stable isotope ratios in human hair as a new method for discern

107 al ERM-AE640 and measurements of the mercury isotope ratios in ID blends, subsequent to a cold vapor

108 Silicon isotope ratios in natural waters and several commercial

109 h accuracy and precision determination of Si isotope ratios in natural waters.

110 d by historical records of Pb content and Pb isotope ratios in sediment profiles.

111 We measured mercury (Hg) isotope ratios in sediments and various estuarine organi

112 en, carbon, and amino acid specific nitrogen isotope ratios in six species distributed across differe

113 that (131)I shows much lower local (<80 km) isotope ratios in soils relative to (137)Cs.

114 n of zinc (FAZ) in human milk and CF by dual-isotope ratios in urine.

115 The delta(18)O isotope ratio increased with D and decreased with MC.

116 evident in liver isotope ratios, but muscle isotope ratios indicated a year-round reliance on benthi

117 (in this case a Vertex 70 V (Bruker)) or an isotope ratio infrared spectrometer (IRIS) (in this case

118 Isotope-ratio infrared spectroscopy (IRIS) offers a chea

119 verall discrimination potential of strontium isotope ratio is evidenced in the final statistical disc

120 Although we utilize P-SIF to measure natural isotope ratios, it also could be combined with experimen

121 37)Cs distribution patterns, (135)Cs/(137)Cs isotope ratios, known Cs chemistry at this site, and his

122 A newly developed isotope ratio laser spectrometer for CO2 analyses has be

123 on these adulterated honey samples using an isotope ratio mass spectrometer in combination with an e

124 uantify MPS via gas chromatography:pyrolysis:isotope ratio mass spectrometer.

125 gh-temperature conversion elemental analyzer:isotope ratio mass spectrometer.

126 is then analysed using the link Multiflow(R)-isotope ratio mass spectrometer.

127 lticollector magnetic sector field gas-phase isotope ratio mass spectrometer.

128 reducing extensive maintenance and costs of isotope ratio mass spectrometers (IRMS).

129 N2 (delta(15)N2) was monitored via gas bench isotope ratio mass spectrometry (GB-IRMS) for 21 days.

130 l3) was explored by both, gas chromatography-isotope ratio mass spectrometry (GC-IRMS) and GC-quadrup

131 he current study, we used gas chromatography-isotope ratio mass spectrometry (GC-IRMS) to measure the

132 ios of NDMA by gas chromatography coupled to isotope ratio mass spectrometry (GC/IRMS).

133 coupled with photodiode array detection and isotope ratio mass spectrometry (HT-LC/PDA/IRMS) for the

134 od of high-temperature liquid chromatography isotope ratio mass spectrometry (HTLC-IRMS) is used to d

135 rall hydrogen isotope analysis via GC-Cr/HTC-isotope ratio mass spectrometry (IRMS) achieved a precis

136 egions along the Italian coasts, by means of isotope ratio mass spectrometry (IRMS) and resonant Rama

137 ct the geographic origin of lentils by using isotope ratio mass spectrometry (IRMS) in combination wi

138 surements were compared with two independent isotope ratio mass spectrometry (IRMS) laboratories and

139 atural silicon due to storing and during the isotope ratio mass spectrometry (IRMS) measurements were

140 Isotope Ratio Mass Spectrometry (IRMS), (1)H Nuclear Mag

141 Isotope analysis was performed by isotope ratio mass spectrometry (IRMS), and the determin

142 carbon stable isotope ratio (delta(13)C) by isotope ratio mass spectrometry (IRMS), and trace elemen

143 with an online pyrolysis system coupled with isotope ratio mass spectrometry (IRMS), is developed for

144 different vegetation types were measured by isotope ratio mass spectrometry (IRMS), to evaluate it a

145 were analysed using electronic nose (EN) and isotope ratio mass spectrometry (IRMS), with the aim of

146 en in the past for these measurements, i.e., isotope ratio mass spectrometry (IRMS), with very encour

147 ly CO2 sampling for laboratory analyses with isotope ratio mass spectrometry (IRMS).

148 ambs from different regions were measured by isotope ratio mass spectrometry (IRMS).

149 The performance of liquid chromatography-isotope ratio mass spectrometry (LC-IRMS) for polar halo

150 We used isotope ratio mass spectrometry (MS) to assess the nitro

151 cal samples by gas chromatography combustion isotope ratio mass spectrometry analysis (GC-C-IRMS).

152 Using (15)N2 tracer experiments and isotope ratio mass spectrometry analysis, we observed th

153 ectrometry and gas chromatography-combustion isotope ratio mass spectrometry for deuterium enrichment

154 )(5)N ( per thousand) were measured by using isotope ratio mass spectrometry in a case-cohort study (

155 ultiple reaction monitoring (MRM) assays for isotope ratio mass spectrometry of most metabolites in a

156 Bulk isotope ratio mass spectrometry revealed that the AMF ex

157 nt laboratories using two gas chromatography-isotope ratio mass spectrometry systems and one gas chro

158 performance liquid chromatography linked to isotope ratio mass spectrometry via an interface allowin

159 s (CF), by combining the high sensitivity of isotope ratio mass spectrometry with a heavy water label

160 by LC-IRMS (liquid chromatography coupled to isotope ratio mass spectrometry).

161 ried out by gas chromatography combined with isotope ratio mass spectrometry.

162 esterol synthesis using deuterium uptake and isotope ratio mass spectrometry.

163 hesis (MPS) via gas chromatography-pyrolysis-isotope ratio mass spectrometry.

164 gnatures were measured using continuous flow isotope ratio mass spectrometry.

165 is comparable but worse than continuous flow-isotope ratio mass spectroscopy (CF-IRMS) methods owing

166 agreement with measured delta(13)C-DIC using isotope ratio mass spectroscopy (IRMS).

167 ining an ion trap mass spectrometer (MS) and isotope-ratio mass spectrometer (IRMS).

168 delta(13)C) measured in triplicate using an isotope-ratio mass spectrometer interfaced with a spooli

169 re microcombustion device interfaced with an isotope-ratio mass spectrometer.

170 and liquid organic samples with analysis by isotope-ratio mass spectrometry (IRMS).

171 bolite concentrations were measured by using isotope-ratio mass spectrometry and liquid chromatograph

172 ies for O2--multiple S isotopes (measured by isotope-ratio mass spectrometry and secondary ion mass s

173 ng by stable isotope labeling and combustion isotope-ratio mass spectrometry for precise quantificati

174 average deviation) against three independent isotope-ratio mass spectrometry laboratories.

175 etermination of (15)N isotopic enrichment by isotope-ratio mass spectrometry to measure N2 emissions

176 scopy (IRIS) offers a cheaper alternative to isotope-ratio mass spectroscopy (IRMS), but its use in s

177 refore developed GC-IRMS (gas chromatography-isotope-ratio mass-spectrometry) analysis for carbon and

178 This study presents high-precision isotope ratio-mass spectrometric measurements of isotopi

179 In addition to the conventional mass and isotope ratio matches, we would match annotated fragment

180 Our results demonstrate that the Cu stable isotope ratios may help trace Cu behavior in redox-dynam

181 es coinciding with rapidly decreasing carbon isotope ratios may in part be the result of a radical re

182 The carbon stable isotope ratios measured by conventional IRMS technique a

183 We further demonstrate that stable isotope ratios measured on in-house standards of unknown

184 Blank correction for isotope ratio measurement on small amounts of substances

185 ns separated are suitable for high precision isotope ratio measurements by TIMS or MC-ICP-MS, as demo

186 Selenium isotope ratio measurements in solution in the CaCO3 and

187 ficient sample preparation method in view of isotope ratio measurements is described, allowing the se

188 We conclude that Zn isotope ratio measurements of bone and teeth are a new a

189 rove sensitivity, accuracy, and precision of isotope ratio measurements of plutonium when compared to

190 w sample loading procedure was developed for isotope ratio measurements of ultratrace amounts of plut

191 r findings suggest potential for water vapor isotope ratio measurements to be used in conjunction wit

192 t Sr isotope analyses, MgAr(2+) may impair S isotope ratio measurements, while CaAr(2+) may cause int

193 t requires no sample pretreatment for the Si isotope ratio measurements.

194 is then carried to the mass spectrometer for isotope ratio measurements.

195 concentration as the analyte elements, also isotope ratio measurements.

196 13)C-enriched CO2 samples, a newly developed isotope ratio mid-infrared spectrometer was introduced w

197 paration process and, finally, measuring the isotope ratios modified by the isotope dilution process.

198 This can be accessed by isotope ratio monitoring (13)C NMR spectrometry.

199 sotope effects (PSIEs) have been measured by isotope ratio monitoring (13)C nuclear magnetic resonanc

200 Isotope ratio monitoring by (13)C NMR spectrometry (irm-

201 Relatively recent developments in isotope ratio monitoring by (13)C NMR spectrometry make

202 y (irm-(13)C NMR) was mainly used to measure isotope ratio monitoring with the potential of conductin

203 , the effect of physicochemical processes on isotope ratios needs to be known.

204 Total ion counts ((239)Pu + (242)Pu) and isotope ratios obtained from fiber-loaded filaments were

205 bove the minimum level of 0.50% and a stable isotope ratio of carbon (delta(1)(3)C) below the maximum

206 method is proposed to determine (13)C/(12)C isotope ratio of carbon dioxide (delta(13)C) in ciders.

207 nd clean way for measuring the triple oxygen isotope ratio of carbon dioxide with high precision.

208 To make use of the isotope ratio of nonexchangeable hydrogen (delta(2)H(n (

209 The nitrogen stable isotope ratio of NOx (delta(15)N-NOx) has been proposed

210 model can overestimate the cellulose oxygen isotope ratio of plants under salinity or water stress.

211 90% of the samples, the difference in the C isotope ratio of protein and honey fraction (delta(13)Cp

212 Monitoring the Sr isotope ratio of water from legacy oil and gas wells or

213 two independent chemical water tracers (the isotope ratios of (231)Pa/(230)Th and (143)Nd/(144)Nd),

214 However, the isotope ratios of B and Sr provide more sensitive inform

215 To date the stable isotope ratios of berries have never been extensively ex

216 Stable-isotope ratios of carbon ((1)(3)C/(1)(2)C, expressed as

217 nabled real-time monitoring of carbon stable isotope ratios of carbon dioxide and methane in air.

218 and nitrous oxide) as well as carbon stable isotope ratios of carbon dioxide and methane, above and

219 Isotope ratios of Cd were determined in the bulk C and A

220 eason, the information potential of hydrogen isotope ratios of chlorinated ethenes remains untapped.

221 d Canada, were analysed obtaining the stable isotope ratios of delta(13)C, delta(15)N, delta(2)H, del

222 tios, and as such the spacing between stable isotope ratios of diet and tissue may be influenced by p

223 The carbon, nitrogen and sulphur isotope ratios of feed and fillet were highly positively

224 we investigated the chemical composition and isotope ratios of groundwater samples from the roll-fron

225 Stable isotope ratios of H, C, and O are powerful indicators of

226 Stable isotope ratios of HCHs cover the ranges from -233 per th

227 ybdates, a new approach for determination of isotope ratios of individual thiomolybdate species was d

228 We then measured the oxygen isotope ratios of leaf water, stem water and stem cellul

229 The stable isotope ratios of light elements are a promising set of

230 This study examined stable isotope ratios of MeHg (mass-dependent fractionation, as

231 The carbon isotope ratios of milk protein and milk fat as well as t

232 Carbon and hydrogen isotope ratios of NDMA function as fingerprints of the N

233 ed the precise quantification of C, N, and H isotope ratios of NDMA in aqueous samples at concentrati

234 ary to interpret nitrogen (N) and oxygen (O) isotope ratios of nitrate ((15)N/(14)N and (18)O/(16)O)

235 We show that the observed oxygen isotope ratios of nitrate are compatible with nitrate fo

236 and pseudoephedrine by measurement of stable isotope ratios of nitrogen (delta(15)N), hydrogen (delta

237 Along with manganese concentrations, isotope ratios of nitrogen and a high number of Rare Ear

238 ce suggests a relatively faster change in Pb isotope ratios of North Pacific deep water below the WSA

239 Stable isotope ratios of oxygen (delta(18)O, Delta(17)O) and ch

240 The (13)C/(12)C, (14)C/(12)C, and (2)H/(1)H isotope ratios of PAHs were determined in forest soils f

241 horus to nitrogen, and carbon ratios, oxygen isotope ratios of phosphate in vegetation, and phosphata

242 Here we use nitrogen-isotope ratios of porphyrins to show that eukaryotes con

243 The (206)Pb/(207)Pb isotope ratios of runoff (1.16) were identical to those

244 field and airborne imaging spectroscopy and isotope ratios of SAP species in the Sacramento-San Joaq

245 table isotope data of oxygen, and radiogenic isotope ratios of strontium for 84 radiocarbon-dated ske

246 (iv) a systematic shift in sulfur and oxygen isotope ratios of sulfate, indicative of microbial sulfa

247 Although the Sr isotope ratios of the grapes do not show a strong correl

248 The hydrogen isotope ratios of the methyl [(D/H)I] and methylene [(D/

249 Determination of C and Cl isotope ratios of the reactants and products in the redu

250 ovel explanation for the discrepancy between isotope ratios of the soil water profile and other water

251 elationship exists between the (87)Sr/(86)Sr isotope ratios of the wine and the grapes.

252 We observed that the isotope ratios of this precipitation generally were (2)H

253 on body mass and carbon and nitrogen stable isotope ratios of tissue.

254 Here, we present Hg isotope ratios of unroasted ore waste, calcine (roasted

255 ng (P-SIF) is a method to measure the carbon isotope ratios of whole proteins separated from complex

256 nsible for the differentiation of the oxygen isotope ratios of wine water.

257 characterised in terms of the (87)Sr/(86)Sr isotope-ratio of musts from the 2010, 2011 and 2012 vint

258 endence (<1 per thousand) of measured carbon isotope ratio on methane concentration.

259 le, by modeling intake using multiple stable isotope ratios or by isolating and measuring specific mo

260 It is demonstrated that generic isotope ratios provide a sound basis for reconstruction

261 erived from fossil fuels will have noble gas isotope ratios reflecting a radiogenic component that wi

262 sis, besides its ability to determine stable isotopes ratios, represents a possible complementary too

263 ent bias, was employed to obtain accurate Si isotope ratio results in all samples by using NBS28 Si s

264 The isotope ratio results suggest direct ingestion of metall

265 Measurements of stable isotope ratios revealed highly pronounced hydrogen fract

266 acific cores recorded Pacific-type neodymium isotope ratios, revealing deep westward flow equivalent

267 Volume mixing and isotope ratios secured with repeated atmospheric measure

268 Nitrogen isotope ratios showed that NH2Cl is the source of the N

269 The stable isotope ratios (SIR) of the bioelements ((2)H/(1)H, (13)

270 Isotope ratios such as (240)Pu/(239)Pu will allow for th

271 eloped using a new coupled carbon and oxygen isotope ratio technique in an exceptionally well-dated s

272 (OAE 2) are characterized by lower nitrogen isotope ratios than are seen in modern marine settings.

273 The soils yield Sr isotope ratios that are intimately related to the local

274 ariations in feldspar composition and oxygen isotope ratios that can only result from hydrothermal co

275 through modeling of Sr-Nd-Pb abundances and isotope ratios that the primitive Oraefajokull melts cou

276 ent response in lamb meat of stable nitrogen isotope ratio to the dietary proportion of legumes, and

277 After normalization of W isotope ratios to a pair of W isotopes, following the ex

278 ltaneous monitoring of the (18)O/(16)O and W isotope ratios to correct oxide interferences on a per-i

279 We use uranium (U) isotope ratios to detect and quantify the extent of natu

280 uation, which relates the change in measured isotope ratios to the decreasing substrate fractions and

281 ituents (trace-, ultra-trace elements and Sr isotope ratios) to assess the origin of world famous bra

282 Large-scale surveys of carbon-isotope ratios typically show a strongly bimodal frequen

283 iation of 0.0012 (0.117%) from the certified isotope ratio value of NBL CRM Pu128 was measured when f

284 Stable isotope ratio variations are regulated by physical and c

285 Multielement isotope ratio was assessed in fat and defatted (protein)

286 ology for the determination of stable carbon isotope ratio was evaluated in comparison with the metho

287 o optical and electron microscopy and carbon isotope ratios, we demonstrate that the Mn is hosted exc

288 lution composition, speciation of Se, and Se isotope ratios were determined during both sets of exper

289 The Cu loads and stable isotope ratios were determined in the dissolved phase, s

290 The (87)Sr/(86)Sr isotope ratios were measured on grape, wine and soil sam

291 and Sr ((87)Sr/(86)Sr = 0.70923 +/- 0.00024) isotope ratios were not consistent with the expected iso

292 degrees S have elevated Pb and Sr and low Nd isotope ratios, which argues, together with increasing s

293 Here we present nitrogen isotope ratios with a mean of 0.0 +/- 1.2 per thousand f

294 CSIA profiles showed large shifts of carbon isotope ratios with depth (up to 24 per thousand) sugges

295 lybdates, collecting each peak and analyzing isotope ratios with multicollector inductively coupled p

296 shown here to have indistinguishable oxygen isotope ratios, with a difference in Delta'(17)O of -1 +

297 Highly accurate determinations of the isotope ratio within breath samples collected from a mou

298 The marked variance in isotope ratios within each common swift population contr

299 tic show high Cd content and light Cd stable isotope ratios within the ODZ, indicative of CdS precipi

300 A new method to determine Pb isotope ratio without ion-exchange-matrix separation is