ライフサイエンスコーパス: isotopic composition

1 found that shales of all ages have a uniform isotopic composition.

2 w a clear alteration of their initial oxygen isotopic composition.

3 fluences on pteropod shell carbon and oxygen isotopic composition.

4 produces one or the other, depending only on isotopic composition.

5 lenged by the Moon's unexpectedly Earth-like isotopic composition.

6 s of past atmospheric GEM concentrations and isotopic composition.

7 inties; skins are shifted towards a lower Sr isotopic composition.

8 oduces a stoichiometric sampling in terms of isotopic composition.

9 with W metal and normalized to the nominal W isotopic composition.

10 cts sampled are characterized by a unique Hg isotopic composition.

11 f the 2017 nuclear release has a non-natural isotopic composition.

12 istinct microscale variations in the uranium isotopic composition.

13 mperature and fluid delta(18)O on the rocks' isotopic composition.

14 ite meteorites have almost indistinguishable isotopic compositions.

15 ne algae as palaeo-pH proxies based on boron isotopic compositions.

16 mental mercury (GEM) concentrations, but not isotopic compositions.

17 ogeneous assortment of embryos with distinct isotopic compositions.

18 ace is principally determined by the solvent isotopic composition (2-PrOH/D).

19 The hydrogen-isotopic compositions ((2)H/(1)H ratios) of lipids in mi

20 d similar concentrations (0.1-0.7 mug/L) and isotopic composition ((206)Pb/(207)Pb = 1.154-1.164).

21 A large range of Sr isotopic compositions ((87)Sr/(86)Sr between 0.70706 and

22 nown but differing delta(13)C and delta(18)O isotopic composition allows standard uncertainties of 0.

23 We demonstrated variability in copper isotopic composition along the length of the gut.

24 The Pb isotopic composition analyses combined with a case-contr

25 The Pb isotopic composition analysis suggested clear anthropoge

26 y used technique for the determination of Pu isotopic composition and concentration in complex matric

27 ations in various solid samples with natural isotopic composition and enriched with (10)B.

28 PTB, were investigated with respect to their isotopic composition and molar mass M(Si).

29 Having identical isotopic composition and nearly identical drift time dis

30 giant-impact scenarios to explain the Moon's isotopic composition and provides a new pathway to reach

31 We have determined the isotopic composition and the carotenoid contents of 38 e

32 een in the composition of inclusions, carbon isotopic composition, and nitrogen impurity content.

33 eference materials varying in chemical form, isotopic composition, and period of production are prese

34 tion, organic matter content, organic carbon isotopic composition, and tracers of mineral matter flux

35 al saline fluids--especially their strontium isotopic compositions--and the timing of host diamond fo

36 aminant transport, degradation pathways, and isotopic composition are improving quantitative estimate

37 Pitcairn lavas contain sulfides whose sulfur isotopic compositions are affected by mass-independent f

38 Its chemical and oxygen isotopic compositions are consistent with very-low-degre

39 e ratios around 5.3% and (13)C and D methane isotopic compositions around -40 and -240 per mille, res

40 d show that Vesta contains the same hydrogen isotopic composition as that of carbonaceous chondrites.

41 determine Hg species specific (MMHg and IHg) isotopic composition associated with methylation and dem

42 iations in (18)O and site-specific (15)N N2O isotopic composition at remote sites with a temporal res

43 labeling studies, which reveal roughly equal isotopic compositions at the allylic and distal vinylic

44 cts," that is, deviations from elemental and isotopic compositions at thermodynamic equilibrium.

45 of methods including dependencies on solvent isotopic composition, buffer concentration, and pH.

46 al bead was used for determination of the Pu isotopic composition by thermal ionization mass spectrom

47 ent Hg speciation (monomethyl-Hg) and stable isotopic composition (C, N, Hg) of 53 Alaskan ringed sea

48 ird Hg source is not discernible, and the Hg isotopic composition can be largely explained by the mix

49 Online, spectroscopic analysis of N2O isotopic composition can provide continuous measurements

50 -spatial resolution techniques to obtain C-N isotopic compositions, chemical, and structural informat

51 components, were used for delineating the Pb isotopic composition corresponding to the anthropogenic

52 The isotopic composition data are collected independently in

53 intrinsic WUE (iWUE) from gas exchange and C isotopic composition (delta(13) C) differ due to an inte

54 urements of methane concentration and stable isotopic composition (delta(13)C(CH4)) would greatly imp

55 The carbon stable isotopic composition (delta(13)C) embedded in the methyl

56 groundwater methane (CH4) concentration and isotopic composition (delta(13)C-CH4), groundwater triti

57 The nitrogen isotopic composition (delta(15)N) of newly fixed N is cu

58 The nitrogen isotopic composition (delta(15)N) of NOx (NO + NO2) was

59 riations of atmospheric water vapour and its isotopic composition (delta(18) OV ) influence water and

60 ave developed a new method for measuring the isotopic composition (delta(18)O and deltaD) of differen

61 Our results show that water oxygen isotopic composition (delta(18)O(water)) rather than lak

62 Greenland ice core water isotopic composition (delta(18)O) provides detailed evid

63 6 to 60.1 mug/g) sediments had a distinct Hg isotopic composition (delta(202)Hg of 0.02 +/- 0.15 per

64 As such, variations in the sulfur isotopic composition (delta(34)S) of sedimentary sulfate

65 id (pHcf); the latter was derived from boron isotopic compositions (delta(11)B) of the coral skeleton

66 Here, Cd isotopic compositions (delta(114/110)Cd) of archived fer

67 oxies such as concentration and conventional isotopic compositions (delta(13)C and delta(18)O) are no

68 This work aimed to explore the variation of isotopic compositions (delta(13)C, delta(18)O) of extra-

69 ranium, we measured the U concentrations and isotopic compositions (delta(238)U) of sediments and por

70 ort a shift from negative to positive copper isotopic compositions (delta(65)CuERM-AE633) in organic

71 00 y based on the stable hydrogen and carbon isotopic compositions (deltaD and delta(13)C, respective

72 b, Zn, V, Ni, Cu, Cr, Co, Cd, and Hg) and Pb isotopic composition denote two main eras of pre- and po

73 alternate method for total boron as well as isotopic composition determination in boron based solid

74 This is the first case study of Sr isotopic composition determination in such ancient decid

75 Finally, stable carbon and nitrogen isotopic compositions determined from both mat samples s

76 ted by presence of a blank, with an apparent isotopic composition different from that of the sample.

77 contain a recycled component, their uranium isotopic compositions do not differ from those of the bu

78 wed that the water-metabolism-derived triple-isotopic compositions due to impaired water absorption i

79 ry experiments to assess the preservation of isotopic composition during sampling of gaseous elementa

80 ctively, examining hydrocarbon abundance and isotopic compositions (e.g., C2H6/CH4, delta(13)C-CH4) a

81 of the SRS environment, revealing plutonium isotopic compositions, e.g., (244)Pu, that reflect the u

82 The Pb isotopic compositions for 51 spots of melt glass in 11 s

83 Depth profiles of Hg isotopic compositions for bottomfish (excludung C. ignob

84 Here we report Mg and O isotopic compositions for ultrahigh pressure metamorphic

85 Two weeks of measurements of N2O isotopic composition from Cambridge, MA, in May 2013 are

86 ctions of greenness and foliar nutrition and isotopic composition from herbarium samples.

87 nalyzed for total Hg concentration (THg) and isotopic composition from streams and rivers in the vici

88 We present a reconstruction of deep-sea Fe isotopic compositions from a Pacific Fe-Mn crust spannin

89 Uniform, terrestrial-mantle-like W isotopic compositions have been reported among crystalli

90 Trinitite glass yields a large range of Pb isotopic compositions (i.e., (206)Pb/(204)Pb = 17.08-19.

91 ever, contaminant-induced variability of the isotopic composition in biota is poorly understood.

92 pths (200-1,300 m), contrasting with heavier isotopic composition in deep waters.

93 reviously been constrained only by the water isotopic composition in ice cores, without an absolute t

94 to sort out all particles according to their isotopic composition in one analysis.

95 study suggests that the variability in iron isotopic composition in planetary objects cannot be due

96 al parameters, Cu and Zn concentrations, and isotopic composition in solution in the presence of matu

97 The average isotopic composition in studied sphalerites (delta(202)H

98 The changes in copper isotopic composition in the colon are accompanied by cha

99 hways are likely to be influencing the final isotopic composition in the ethanol.

100 ng the 24h of the time-course experiments Hg isotopic composition in the produced MMHg becomes signif

101 d patterns of black spruce growth and carbon isotopic composition in tree rings in response to climat

102 olution measurements of wood anatomy and the isotopic composition in tree-rings have the potential to

103 on are the dominant mechanisms in regulating isotopic compositions in aerobic and anaerobic condition

104 er may change not only Pb but also Sr and Nd isotopic compositions in both dissolved and suspended lo

105 Here, we analyze Ca isotopic compositions in experimental and natural sample

106 resent measurements of Pb concentrations and isotopic compositions in seawater and surface sediments

107 rcury (MMHg) concentrations and mercury (Hg) isotopic compositions in sediment and aquatic organisms

108 itic classes possess mass-independent sulfur isotopic compositions in sulfide and organic phases.

109 gen (delta(18) O) and nitrogen (delta(15) N) isotopic compositions in tissue from herbarium specimens

110 ropane, and n-butane, along with the methane isotopic composition, indicate that the emitted methane

111 ethod, a more robust inventory of NOx source isotopic composition is possible, which has implications

112 ow significant short-term variability in N2O isotopic composition larger than the measurement precisi

113 EC hydrogen and nitrogen isotopic compositions match those of Earth's mantle, so

114 in food webs and might play a role in the Hg isotopic composition measured in sediments and organisms

115 Lead concentrations and isotopic compositions measured in the sediments of the h

116 The mass independent Hg isotopic compositions (MIF; Delta(199)Hg) of the sedimen

117 out using molecules that differ only in the isotopic composition of a phenyl group positioned remote

118 bits large and enigmatic departures from the isotopic composition of abiogenic calcite, known as vita

119 Here we use the neodymium (Nd) isotopic composition of absolute-dated cold-water coral

120 l solvent at these temperatures, the initial isotopic composition of adsorbed H/D on the catalyst sur

121 que approximately 10 year record of the lead isotopic composition of airborne insoluble particulate m

122 The isotopic composition of all standards was value assigned

123 ) and lumen area (LA), along with the oxygen isotopic composition of alpha-cellulose (delta(18) O(cel

124 -C-IRMS) was developed to measure the carbon isotopic composition of aqueous phase ethanol at natural

125 In order to characterize the stable isotopic composition of aragonitic pteropod shells and t

126 Here, we report measurements of the stable isotopic composition of atmospheric CH4 ((13)C/(12)C and

127 he goal of measuring seasonal changes in the isotopic composition of atmospheric CH4 on Earth and eve

128 Stable isotopic composition of atmospheric nitrate (nitric acid

129 The initial isotopic composition of atmospheric Xe remains unknown,

130 eous and nondestructive determination of the isotopic composition of boron ((10)B/(11)B atom ratio) a

131 The isotopic composition of boron in natural and enriched sa

132 We measured the Pb isotopic composition of both potential Pb sources and 45

133 The isotopic composition of bulk Se and component Se pools r

134 The isotopic composition of carbon dioxide provides a powerf

135 gh-resolution deglacial record of the stable isotopic composition of carbon in CO2(delta(13)C-CO2) in

136 cycle that are independent of changes to the isotopic composition of carbon input.

137 thousand), short-lived negative spike in the isotopic composition of carbonate carbon.

138 the MAVEN mission and further studies of the isotopic composition of carbonate in the Martian rock re

139 ate-water system, at equilibrium, the oxygen isotopic composition of carbonate is dependent not only

140 ass spectrometry (MS) to assess the nitrogen isotopic composition of cell material when the strains w

141 nd, the present study suggests that chlorine isotopic composition of chloroform might be used to disc

142 The isotopic composition of CO2 (delta(13)C(spiked_sample))

143 imation of enzymatic activity of CA from the isotopic composition of CO2.

144 A pre-onset excursion in the isotopic composition of crenarchaeol and ocean temperatu

145 Novel records of the isotopic composition of crenarchaeol constrain the globa

146 CO2) concentration, major ion concentration, isotopic composition of dissolved inorganic carbon (delt

147 lection and preparation have on the measured isotopic composition of egg components.

148 Subtle variations in the isotopic composition of elements carry unique informatio

149 We present the Sr isotopic composition of enamel of the most ancient decid

150 used to define a protocol for analyzing the isotopic composition of EVOOs in order to certify their

151 throughout at a level that is similar to the isotopic composition of Fe(II)(aq).

152 esent new temperature data, derived from the isotopic composition of fossil brachiopods.

153 that Earth's temperature (estimated from the isotopic composition of fossil shells) may have been ind

154 en several measurements made of the nitrogen isotopic composition of gaseous NOx (NOx = NO + NO2) fro

155 irm the ability to record differences in the isotopic composition of GEM (i) with distance from point

156 lanetary differentiation may also modify the isotopic composition of geochemical reservoirs.

157 Isotopic composition of H2O and NO3(-) suggested that sn

158 erefore strongly influence the elemental and isotopic composition of hams.

159 is method enables future work to utilize the isotopic composition of HONO for studying HONO chemical

160 not only on the temperature but also on the isotopic composition of host water in which the carbonat

161 Here we report in situ measurements of the isotopic composition of hydrogen dissolved in primitive

162 omass, microbial community structure and the isotopic composition of individual microbial membrane [p

163 The isotopic composition of Italian berries was characterise

164 most significant large-scale drivers for the isotopic composition of Italian EVOOs.

165 ern China to evaluate controls on the oxygen isotopic composition of lacustrine authigenic carbonates

166 has been developed to reliably quantify the isotopic composition of liquid water, requiring only imm

167 (water), and is ultimately controlled by the isotopic composition of local precipitation (delta(18)O(

168 al sulfur cycle are inferred from the sulfur isotopic composition of marine barite.

169 ternative controls on the sedimentary sulfur isotopic composition of marine pyrite by examining a 300

170 data reveal evidence for a shift to lighter isotopic composition of meteoric waters in glacial times

171 prime tool to characterize the molecular and isotopic composition of microbial cells.

172 Understanding the controls of the Hg stable isotopic composition of microbially produced MeHg is imp

173 The isotopic composition of MMHg in the Yuba River food web

174 The isotopic composition of molybdenum in five samples of gl

175 In contrast, the uranium isotopic composition of MORB requires the convective sti

176 grown pyrites, we show that the triple iron isotopic composition of Neoarchean-Paleoproterozoic pyri

177 Variation across climate gradients in the isotopic composition of nitrogen (N) and carbon (C) in f

178 ce of kinetic and equilibrium effects on the isotopic composition of NO(3)(-) produced from the nitri

179 at the crystallization age together with the isotopic composition of nonradiogenic noble gases trappe

180 te or efficient capture of NOx such that the isotopic composition of NOx remains unaltered during col

181 ect and simultaneous analysis of the age and isotopic composition of nuclear material at the particle

182 levated temperatures alters the chemical and isotopic composition of oceanic crust.

183 The isotopic composition of olive oils was successfully used

184 Volatilization causes changes in the isotopic composition of organic compounds as a result of

185 ition for the past millenium recorded by the isotopic composition of Pb in all three peat bogs is rem

186 The isotopic composition of Pb was determined in Finnish pea

187 ndex (LAI), carbon and nitrogen content, and isotopic composition of plant tissues for five to eight

188 ing models incorporated uncertainties in the isotopic composition of potential nitrate sources and re

189 ds, and estimates of the last glacial oxygen isotopic composition of precipitation based on global ci

190 d understanding of processes controlling the isotopic composition of precipitation.

191 We use the strontium-neodymium-lead isotopic composition of proglacial sediment discharged f

192 Although isotopic composition of reef carbonate material can be u

193 Here, we demonstrate that the oxygen isotopic composition of resin-extractable inorganic phos

194 we report precise measurements of the stable isotopic composition of ruthenium captured in air filter

195 namics of sea surface temperature and oxygen isotopic composition of seawater from 1982 to 2016, base

196 been large and systematic changes in the Fe isotopic composition of seawater over the Cenozoic that

197 sent a framework for interpreting the carbon isotopic composition of sedimentary rocks, which in turn

198 For that purpose, the isotopic composition of selected SiF4 samples was determ

199 We measured the titanium isotopic composition of shales to constrain the chemical

200 Isotopic composition of sharks sampled in reef and seagr

201 We also measured the isotopic composition of soil microbial biomass and the r

202 22-y (1980-2002) record of the oxygen-triple isotopic composition of sulfate (SO4) aerosols retrieved

203 Measurements of the isotopic composition of sulfate and sulfide have been es

204 s a constraint over the last 390 Ma from the isotopic composition of sulfur in coal.

205 ple, may provide the best estimate of the Mg isotopic composition of the bulk silicate Moon (BSM).

206 plied to ensure accurate measurements of the isotopic composition of the CO2 in ultradry air, express

207 The Mg isotopic composition of the CSF from hydrocephalus patie

208 The Mg isotopic composition of the dunite 72415 (delta(25)Mg =

209 The knowledge of the isotopic composition of the enriched silicon material is

210 Changes in the isotopic composition of the fine-root population over tw

211 ta(13)C-CH4 and deltaD-CH4 correspond to the isotopic composition of the gas reservoir.

212 n processes likely affected the chemical and isotopic composition of the gases, making it difficult t

213 H(2) O at the site of exchange, and that the isotopic composition of the H(2) O at the sites of evapo

214 (iii) We account for changes in the oxygen isotopic composition of the ice sheet by using isotope-e

215 similar values and were very close to the Sr isotopic composition of the local river where they were

216 report in situ measurements of the hydrogen isotopic composition of the mineral apatite in eucrite m

217 solution as nitrate to evaluate the nitrogen isotopic composition of the NOx (delta(15)N-NOx).

218 tz (Barberton, South Africa) that reveal the isotopic composition of the paleo-atmosphere at approxim

219 The isotopic composition of the pure gas can be simultaneous

220 mination (Delta(18)O) by changing the oxygen isotopic composition of the source gas CO(2) and water v

221 The isotopic composition of the substrates was designed to o

222 (Delta(14)C) and stable carbon (delta(13)C) isotopic composition of the UCM solvent-extracted from c

223 The elemental and isotopic composition of their skeletons is frequently us

224 Analysis of the THg concentration and Hg isotopic composition of these environmental samples indi

225 This variability in stable isotopic composition of tissues is likely to be a result

226 y associated with two model assumptions (the isotopic composition of water at the sites of CO(2)-wate

227 u spectroscopic measurements of the evolving isotopic composition of water vapor during cirrus format

228 The Hg isotopic composition of Yuba Fan sediment (delta(202)Hg

229 We measured the Pb isotopic compositions of a well-dated suite of eight dee

230 ge of the distributions and enantiomeric and isotopic compositions of amino acids and polyols found i

231 Mercury isotopic compositions of amphipods and snailfish from de

232 Boron concentrations and isotopic compositions of atmospheric dust and dissolved

233 of B, Rb, Sr, Ba, Fe, Mn and Zn, as well as isotopic compositions of B and Sr.

234 Isotopic compositions of boron in the range of 0.247-2.0

235 We show that the distinct molybdenum isotopic compositions of CAIs cover almost the entire co

236 eal-time dependence of the carbon and oxygen isotopic compositions of CO(2) and H(2)O in terms of mos

237 aluate the feasibility of using chemical and isotopic compositions of coffee beans to identify their

238 We determined the stable isotopic compositions of cyanide-carbon (CCN) and cyanid

239 The Hf-Nd isotopic compositions of dust in the North Pacific centr

240 The present-day nitrogen isotopic compositions of Earth's surficial ((15)N-enrich

241 The C, N, O, and S isotopic compositions of egg components from 7 different

242 tical method to measure the N-elemental and -isotopic compositions of experimental run products compo

243 hat it is feasible to determine the U and Pu isotopic compositions of historic nuclear devices from t

244 We document hydrogen isotopic compositions of hydrated volcanic glasses and m

245 ere, we combine analysis of biomolecular and isotopic compositions of lipids preserved in prehistoric

246 Yet, the isotopic compositions of lithophile elements (Sr, Nd, Hf

247 for water that are consistent with measured isotopic compositions of lunar samples.

248 Our modelling implies that the isotopic compositions of magnesium, silicon and iron, an

249 nding paradigm assumes that the chemical and isotopic compositions of many elements in the bulk silic

250 The distinct isotopic compositions of marine and terrestrial N2O sour

251 The concentrations and isotopic compositions of mercury (Hg) in surface sedimen

252 icrobial methanogenesis was indicated by the isotopic compositions of methane and carbon dioxide, bio

253 Although isotopic compositions of methane have traditionally aide

254 urement quality and reliability for hydrogen isotopic compositions of organic substances (Cr-EA metho

255 en inferred from bulk analyses of the carbon isotopic compositions of pre-2,500 Ma kerogens, these in

256 h recent indications from lunar carbon and S isotopic compositions of primitive lunar materials.

257 t unexpected, large mass-independent sulphur isotopic compositions of pyrite with Delta(33)S of up to

258 By comparing our results with ruthenium isotopic compositions of spent nuclear fuels, we show th

259 The molecular and isotopic compositions of such residues can be used to re

260 th is widely inferred from the elemental and isotopic compositions of sulfidic sedimentary rocks, whi

261 The clay-sized Hf-Nd isotopic compositions of the desert samples from the Sin

262 the strontium, radium, oxygen, and hydrogen isotopic compositions of the effluents reflect the compo

263 Isotopic compositions of the extracts indicate that a gr

264 Extrapolation of the Nd and Hf isotopic compositions of the kimberlite source to the ag

265 The isotopic compositions of the main constituents of planet

266 The Pb-isotopic compositions of the Samoan lavas reveal several

267 The isotopic compositions of the total water evolved from a

268 rth is best explained by assuming that the W isotopic compositions of the two bodies were identical i

269 In this study, we measured the chemical and isotopic compositions of water samples from MTM-impacted

270 oth mass-dependent and mass-anomalous sulfur-isotopic composition over length scales of even a few hu

271 ges in particle dimensions, aggregation, and isotopic composition over time.

272 Lead fluxes and isotopic composition point to national/regional petrol-P

273 The pressure dependence of iron isotopic composition provides an independent constraint

274 tain two Cl-bearing components with elevated isotopic compositions relative to the bulk-Earth value o

275 ting pH from biogenic carbonates using boron isotopic compositions relies on the assumption that only

276 nvironments, but its influence on natural Hg isotopic composition remains to be ascertained.

277 Modern water isotopic compositions reproduce mean catchment elevation

278 akes is dominantly of natural origin, having isotopic composition resembling that measured for indige

279 Considerable daily scale variations of Fe isotopic composition should therefore be taken into acco

280 The xenon isotopic composition shows deficits in heavy xenon isoto

281 mpactor that formed the Moon probably had an isotopic composition similar to that of the Earth, hence

282 ast three uranium oxide powders of different isotopic compositions ("source terms") in the production

283 LSC lavas have a slightly more radiogenic Hf isotopic composition than VFR lavas.

284 from a single homogeneous reservoir with an isotopic composition that is indicative of a uniform and

285 m Northern California have disequilibrium Ca isotopic compositions that suggest rapid crystal growth

286 Here, we used mercury isotopic composition to assess the dietary origin of MeH

287 Comparison of shell oxygen isotopic composition to depth changes in the calculated

288 atite chondrite (EC) meteorites have similar isotopic composition to terrestrial rocks and thus may b

289 The response in metal concentrations and isotopic composition to variations in photosynthetic act

290 report calibration data linking single-cell isotopic compositions to the corresponding bulk isotopic

291 the protoplanetary disk, we attribute these isotopic compositions to the rapid condensation of AOAs

292 os measured on in-house standards of unknown isotopic composition using the (12)C(15)N(-)/(12)C(14)N(

293 with different mole fractions but identical isotopic composition was demonstrated to be highly accur

294 Large spatial variations in Hg isotopic compositions were observed in the SCS (delta(20

295 Nonnatural molybdenum isotopic compositions were observed, reflecting an input

296 not cause a measurable change in the carbon isotopic composition, whereas for pure-phase evaporation

297 evidence for the effect of pressure on iron isotopic composition, which we found to vary according t

298 By combining isotopic composition with (1)H NMR data using a multivar

299 that there is a more positive radiogenic Hf isotopic composition with clay-sized fractions than the

300 particle measured here has two resolvable U isotopic compositions with a single composition of weapo