ライフサイエンスコーパス: oxygen isotope

1 nd in situ measurements of O2 /Ar and triple oxygen isotope.

2 ent ocean as inferred from the deposition of oxygen isotopes.

3 y monitoring the magnetic interaction of the oxygen isotope 17O with the Mn2+ by using a rapid freeze

4 cords show opposite trends in time series of oxygen isotopes (a proxy for precipitation variability)

5 O)(-), and Tc((16)O)(3)((17)O)(-) at natural oxygen isotope abundance levels, and in addition the tem

6 the first study that integrates hafnium and oxygen isotopes, all measured in situ on the same, preci

7 High-precision oxygen isotope analyses for the two major groups of ston

8 For oxygen isotope analysis alone, samples as small as 0.2 m

9 ur as well as compound-specific nitrogen and oxygen isotope analysis of nitrate for discrimination of

10 Nitrogen and oxygen isotope analysis of nitrate has a potential for d

11 This limitation was bypassed using oxygen isotope analysis of nitrate in potato tubers, whi

12 new approach, compound-specific nitrogen and oxygen isotope analysis of plant-derived nitrate, has be

13 We applied stable carbon and oxygen isotope analysis to human and faunal tooth enamel

14 Prior to oxygen isotope analysis, grains/crystals were examined u

15 Here we combine oxygen isotope and Mg/Ca data from foraminifers retrieve

16 e we address this deficiency by using paired oxygen isotope and minor element (magnesium/calcium) rat

17 Foraminiferal oxygen isotope and pollen analyses from a deep-sea seque

18 (4)- to 10(6)-year scale, but a link between oxygen isotope and sea level on the 10(7)-year scale mus

19 nging ratio of evaporation to precipitation (oxygen isotopes and gypsum precipitation), reveal a recu

20 g the past 1.75 million years, obtained from oxygen isotopes and Mg/Ca ratios in planktonic foraminif

21 Here we analyse oxygen isotopes and Mg/Ca ratios of foraminiferal shells

22 relations are consistent with control of the oxygen-isotope and incompatible-element geochemistry of

23 ed from sedimentary magnetic susceptibility, oxygen isotopes, and diatom and cladoceran assemblages i

24 ding a quantitative assessment utilizing the oxygen isotope anomaly for quantifying CO2 cycling.

25 The cause of the atmospheric oxygen isotope anomaly may be exchange between CO2 and O

26 Oxygen isotopes are sensitive tracers of climate change

27 etinal produced by the reaction has the same oxygen isotope as the O2 gas used.

28 8 +/- 0.05 per mil and a heat-released water oxygen isotope average value of Delta(17)O = 0.330 +/- 0

29 Oxygen isotope-based temperature estimates from the bacu

30 Here we present oxygen-isotope-based estimates of the palaeo-altimetry o

31 w near-surface temperatures, the exchange of oxygen isotopes between phosphate and water requires enz

32 ater during cellulose synthesis and that the oxygen isotope biochemical fractionation is c. 27 per th

33 The stratospheric CO(2) oxygen isotope budget is thought to be governed primaril

34 n isotope excursions that parallel those for oxygen isotopes can to a large degree be accounted for b

35 As a useful proxy, the oxygen isotope composition (delta18O) of calcite from pl

36 rites, a unique trachyandesite lava (with an oxygen isotope composition identical to that of common u

37 The oxygen isotope composition of phosphate (delta(18)OPO4),

38 n temperature can also be assessed using the oxygen isotope composition of phosphate.

39 Ba/Ca ratio and oxygen isotope composition of planktonic foraminifera in

40 Here we show that the triple oxygen isotope composition of sulphate from ancient evap

41 The oxygen isotope composition of terrestrial sulfate is aff

42 The analysis of the stable hydrogen and oxygen isotope composition of water using cavity ring-do

43 l experimental technique for determining the oxygen isotope composition of water, the CO2-H2O equilib

44 cent fall that has orbital properties and an oxygen isotope composition that suggest a distinct paren

45 Because the stable oxygen isotope composition, delta(18)O, of precipitation

46 The changes in oxygen-isotope composition across the Eocene/Oligocene b

47 density of its limb bones and in the stable-oxygen-isotope composition of its teeth.

48 the currently known natural range of triple oxygen isotope compositions and indicates that the atmos

49 s problem for an accurate measurement of the oxygen isotope compositions for atmospheric sulfate, sin

50 Atmospheric oxygen isotope compositions may be transferred to carbon

51 enland are used to characterize hydrogen and oxygen isotope compositions of ancient seawater.

52 Oxygen isotope compositions of epidote and quartz from c

53 Here we report oxygen isotope compositions of phosphates in sediments f

54 Heterogeneous oxygen isotope compositions of plagioclase from the Boeh

55 The stable oxygen isotope compositions of soil phosphate (delta(18)

56 determinations of soil temperatures and the oxygen isotope compositions of soil waters, constrained

57 Oxygen isotope compositions of these concretions, measur

58 Previous studies of the oxygen isotope compositions of these minerals have sugge

59 arth and the Moon have essentially identical oxygen isotope compositions.

60 this primitive object have a large range of oxygen isotope compositions.

61 By comparing our simulations with oxygen isotope data from sediment cores, we infer that t

62 The large difference in carbon and oxygen isotope data from the marine record between marin

63 We compare oxygen isotope data from these 17th century oyster shell

64 alinity proxy from the magnesium/calcium and oxygen isotope data indicates that transport of water va

65 ysical model-based analysis of lake sediment oxygen isotope data.

66 Here we present a new large high-quality oxygen-isotope dataset from an interval that includes pr

67 otope excursion (CIE) that coincides with an oxygen isotope decrease interpreted as the Paleocene-Eoc

68 Mg/Ca and oxygen isotope (delta (18)OC) measurements in foraminife

69 h the stacked deep-sea benthic foraminiferal oxygen isotope (delta(18)O) curve, which strongly sugges

70 Here, we use speleothem oxygen isotope (delta(18)O) data from Bittoo cave, North

71 all existing records are related to deep-sea oxygen isotope (delta(18)O) data that are influenced by

72 similar in form to the corresponding benthic oxygen isotope (delta(18)O) record and defines an overal

73 re we analyze a new high-resolution deep-sea oxygen isotope (delta(18)O) record from the South Atlant

74 wo overlapping decadal resolution speleothem oxygen isotope (delta(18)O) records from a cave on the A

75 ely dated and seasonally-resolved stalagmite oxygen isotope (delta(18)O) records from Shihua Cave, No

76 itatively connecting them to high-resolution oxygen isotope (delta(18)O) records from the Gulf of Mex

77 (deduced from foraminiferal Mg/Ca and stable oxygen isotopes, delta(18)O) in combination with a recen

78 ical Pacific warm pool is reconstructed from oxygen isotope (delta18O) and magnesium/calcium composit

79 Other corals in the same outcrop grew during oxygen isotope (delta18O) substage 6e, indicating that s

80 critical threshold indicated by the benthic oxygen isotope (delta18O) value of 3.5 per mil during ea

81 e find that 3,910-4,280 Myr old zircons have oxygen isotope (delta18O) values ranging from 5.4+/-0.6%

82 as transitions in the benthic foraminiferal oxygen isotope (delta18Ob) record.

83 aves, simultaneous measurement of carbon and oxygen isotope discrimination allowed the partitioning o

84 ane inlet mass spectrometry to determine the oxygen isotope discrimination of a range of O2-consuming

85 omatism is also consistent with the observed oxygen isotope disequillbrium, sequence of mineral forma

86 ystals is conducted to examine the effect on oxygen isotopes during various treatments.

87 Decay of P also involves a significant oxygen isotope effect (k(16)O(2)/k(18)O(2)) of 1.11 +/-

88 Here we present a unified picture of the oxygen isotope effect in cuprate superconductors based o

89 owever, we are unable to detect this unusual oxygen-isotope effect in new data collected under almost

90 al. claim that there is a large and unusual oxygen-isotope effect on the electronic structure, indic

91 oscopy, density functional calculations, and oxygen isotope effects.

92 d 40% deeper rooting, 28% lighter stem water oxygen isotope enrichment (delta(18)O) signature signify

93 The very slow rate of oxygen isotope exchange between selenate and water under

94 The rate of oxygen isotope exchange between selenate and water was i

95 and water, we use a (17)O tracer to measure oxygen isotope exchange between structural oxygen in man

96 Increases in salinity increased oxygen isotope exchange during cellulose synthesis, whic

97 It is established that no oxygen isotope exchange occurs between sulfate and water

98 Rapid oxygen isotope exchange occurs within the combustion rea

99 Oxygen isotope exchange proceeds as a first-order reacti

100 itional CO2-H2O equilibration technique, the oxygen isotope exchange reaction is done exclusively in

101 iochemical fractionation did not change, but oxygen isotope exchange was twice as high for plants gro

102 ate are either ineffective or not tested for oxygen isotope exchange.

103 Rates of oxygen-isotope exchange at all structural sites in two i

104 We compare oxygen-isotope exchange rates for all structural oxygens

105 Oxygen-isotope-exchange rates were measured between site

106 with carbonate-associated sulfate sulfur and oxygen isotope excursions toward decreased and increased

107 ions have generally paralleled global stable oxygen isotope excursions.

108 was caused by aqueous fluid, the pattern of oxygen isotope fractionation can be explained only by fl

109 hways resulted in a similar small sulfur and oxygen isotope fractionation of -2.4 to -3.6 per thousan

110 te reduction was accompanied by nitrogen and oxygen isotope fractionation of 23.8 +/- 2.5 per thousan

111 We used oxygen isotope fractionation to measure the distribution

112 Described here is the application of oxygen isotope fractionation together with computational

113 periments with (18)O-labeled water, a strong oxygen isotope fractionation was observed for T. denitri

114 In the rock record it is thought that oxygen isotopes have followed a mass-dependent relations

115 Records based on oxygen isotopes, however, contain uncertainties in the r

116 ility has proved difficult, however, because oxygen isotopes in CO(2) are influenced by both the carb

117 uring the last interglacial period, based on oxygen isotopes in diatom silica, diatom assemblages and

118 Mg/Ca palaeothermometry with measurements of oxygen isotopes in foraminiferal calcite in order to rec

119 spanning the past 10,000 years derived from oxygen isotopes in fossil mollusk shells from Peru.

120 Our evidence, based on oxygen isotopes in mammal teeth (which reflect temperatu

121 ly correlated with temperature inferred from oxygen isotopes in mammal teeth and were probably driven

122 Oxygen isotopes in marine sulfate (delta18O(SO4)) measur

123 ew information regarding the distribution of oxygen isotopes in natural samples.

124 shows that tree rings preserve the signal of oxygen isotopes in precipitation during the wet season,

125 magery with the first measurements of stable oxygen isotopes in soluble inorganic phosphate (delta(18

126 Here we use stable oxygen isotopes in speleothems from northern India to re

127 e of the isotope fractionation of sulfur and oxygen isotopes in sulfate from these incubations was lo

128 isotope fractionation factors for sulfur and oxygen isotopes in sulfate were about 40 per thousand an

129 ssed to completion, with the distribution of oxygen isotopes in the Gln152 carboxylate finally matchi

130 The abundances of oxygen isotopes in the most refractory mineral phases (c

131 rochronological studies on stable carbon and oxygen isotopes in the shells of this species, less is k

132 Here we report a study of oxygen isotopes in two basaltic meteorite suites, the HE

133 general circulation model (GCM) that tracks oxygen isotopes in vapor.

134 ntified systematic variations in hafnium and oxygen isotopes in zircons of different ages that reveal

135 Oxygen isotopes, in particular, are affected by the carb

136 ile coordination sites are compared with the oxygen isotope incorporation rates from substrate water

137 itude of the seasonal curve constructed from oxygen isotopes is significantly dampened during the YD,

138 uncertainties with a pulselike change in the oxygen isotope marine record in the Atlantic and Pacific

139 We use stable oxygen isotope measurements from trees without annual ri

140 We infer from our oxygen isotope measurements in planktonic foraminifera t

141 Oxygen isotope measurements indicate that the growth of

142 However, oxygen isotope measurements indicated a temperature-depe

143 Here we report stable oxygen isotope measurements of aragonite in fish otolith

144 Here we use sulphur and triple oxygen isotope measurements of atmospheric sulphate extr

145 Oxygen isotope measurements of carbonate from martian me

146 port from the stratosphere, where the triple oxygen isotopes of CO2 are distinct from those originati

147 xample, widespread anomalies observed in the oxygen isotopes of meteorites have been interpreted as r

148 Natural abundance nitrogen and oxygen isotopes of nitrate (delta(15)NNO3 and delta(18)O

149 The anomaly in triple oxygen isotopes or (17)O excess (denoted by Delta(17)O)

150 timated to be only 15-23 degrees C, based on oxygen isotope palaeothermometry of surface-dwelling pla

151 is core has prevented the use of traditional oxygen-isotope palaeothermometry.

152 leothermometer with a newly developed triple oxygen isotope paleo-CO2 barometer.

153 Here we combine an established oxygen isotope paleothermometer with a newly developed t

154 Here we show that in a chromium versus oxygen-isotope plot Ost 65 falls outside all fields enco

155 Oxygen isotope profiles in otoliths excavated from Ostra

156 esults suggest the potential for a tree-ring oxygen isotope proxy record of tropical cyclone occurren

157 The oxygen isotope ratio (delta(18)O) of cellulose is though

158 t for CO photodissociation having caused the oxygen isotope ratio associated with the early solar neb

159 Using the technique of on-line oxygen isotope ratio mass spectrometry, we found that mi

160 We combine Mg/Ca palaeothermometry and oxygen isotope ratio measurements on planktonic foramini

161 apid, and clean way for measuring the triple oxygen isotope ratio of carbon dioxide with high precisi

162 Abrupt shifts of up to 18 per mil in the oxygen isotope ratio of diatom silica have been found in

163 ied by geochemical biomarkers, including the oxygen isotope ratio of phosphate (delta(18)O(p)) presen

164 at this model can overestimate the cellulose oxygen isotope ratio of plants under salinity or water s

165 ity developed using a new coupled carbon and oxygen isotope ratio technique in an exceptionally well-

166 Measurements of the oxygen isotope ratios (18O/16O and 17O/16O) in atmospher

167 ows normal oscillatory zonation and constant oxygen isotope ratios (delta(18)O = 5.8 to 6.0 per thous

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

169 Stable oxygen isotope ratios (delta(18)O) of Precambrian cherts

170 Here we compare oxygen isotope ratios (delta(18)O) of tooth-enamel carbo

171 on of the Allende meteorite caused shifts in oxygen isotope ratios along a single mass fractionation

172 Furthermore, covarying carbonate carbon and oxygen isotope ratios are constrained to have formed at

173 global sea-level estimates based on deep-sea oxygen isotope ratios at millennial-scale resolution or

174 17O and 18O relative to this line, and their oxygen isotope ratios can be explained by mass fractiona

175 O and (18)O relative to this line, and their oxygen isotope ratios can be explained by mass fractiona

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

177 variation in precipitation over the Amazon: oxygen isotope ratios in annual rings in tropical cedar

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

179 We show that the observed oxygen isotope ratios of nitrate are compatible with nit

180 , phosphorus to nitrogen, and carbon ratios, oxygen isotope ratios of phosphate in vegetation, and ph

181 n, and (iv) a systematic shift in sulfur and oxygen isotope ratios of sulfate, indicative of microbia

182 tion depth coincide with changes in seawater oxygen isotope ratios of up to 1.5 per mil, suggesting a

183 e responsible for the differentiation of the oxygen isotope ratios of wine water.

184 sting variations in feldspar composition and oxygen isotope ratios that can only result from hydrothe

185 SMOW)] by at most 25 +/- 5 per thousand, but oxygen isotope ratios were comparable to modern oceans.

186 oon are shown here to have indistinguishable oxygen isotope ratios, with a difference in Delta'(17)O

187 perature and increasing global ice volume on oxygen isotope ratios.

188 Oxygen-isotope ratios of a stalagmite from Socotra Islan

189 ious meteorites have Mg/Si and Al/Si ratios, oxygen-isotope ratios, osmium-isotope ratios and D/H, Ar

190 ainly to the cumulative rainout processes of oxygen isotopes (Rayleigh distillation) in air parcels d

191 Convective activity, as inferred from oxygen isotopes, reached a minimum during Heinrich event

192 Here we present a new annually-resolved oxygen isotope record from a 1500-year long stalagmite r

193 precisely-dated, high-resolution speleothem oxygen isotope record from Dongge Cave, southwest China

194 Here we present a 175,000 year oxygen isotope record from precisely-dated speleothems t

195 Here, we present an oxygen isotope record of a stalagmite with well-develope

196 Here we present a high-resolution oxygen isotope record of a U/Th-dated stalagmite from su

197 which partially reconciles the foraminiferal oxygen isotope record of tropical sea surface temperatur

198 global ice volume (inferred from the marine oxygen isotope record).

199 pitation bears a striking resemblance to the oxygen-isotope record from Greenland ice cores, with inc

200 relate with major positive shifts in benthic oxygen isotope records and generally coincide with inter

201 Oxygen isotope records from Chinese caves characterize c

202 Here we analyse oxygen isotope records from Red Sea sediment cores to re

203 Here we present three absolutely dated oxygen isotope records from stalagmites in northern Born

204 New multidecadal-resolution foraminiferal oxygen isotope records from the Gulf of Alaska (GOA) rev

205 ring the mid- and late Holocene using paired oxygen isotope records from two regions in North America

206 ative timing of changes in the neodymium and oxygen isotope records indicates that changes in Cenozoi

207 230Th-dated oxygen isotope records of stalagmites from Sanbao Cave,

208 olution sea surface temperature and seawater oxygen isotope records of well-dated sedimentary archive

209 regional climate variance, inferred from our oxygen isotope records, exhibits a precessional rhythm,

210 and ice-sheet model simulations and benthic oxygen isotope records, indicate that Northern Hemispher

211 event 2 is suggested by available speleothem oxygen isotope records.

212 15-13, much longer than expected from marine oxygen isotope records.

213 re of the penultimate deglaciation in marine oxygen-isotope records.

214 ) = -2.5 +/- 4.3 per mil (per thousand)] and oxygen isotopes [referenced to the Vienna standard mean

215 against delta (18)O represents the primitive oxygen isotope reservoir of the early solar nebula.

216 7O against delta18O represents the primitive oxygen isotope reservoir of the early solar nebula.

217 se measurements support the existence of two oxygen isotope reservoirs (the atmosphere and the silica

218 Here we report in situ U-Pb and oxygen isotope results for such zircons that place const

219 Three oxygen isotope sensitive Raman features are identified i

220 , with the appearance in the latter of a new oxygen isotope-sensitive band.

221 We also confirm the presence of an oxygen isotope-sensitive line at 355 cm(-1), detectable

222 that we simulate is equivalent to a seawater oxygen isotope signal of 0.52-0.66 per thousand, or a se

223 ter affected the seawater sulfate sulfur and oxygen isotope signature that has been recorded in carbo

224 The oxygen isotope signature varies with shifts in the sourc

225 ern ice-sheets were restricted during marine oxygen isotope stage (MIS) 14.

226 e data from the marine record between marine oxygen isotope stage 12 (MIS 12) and MIS 11, spanning th

227 gan to build during the early part of Marine Oxygen Isotope Stage 3.

228 ronmental changes around the transition from oxygen isotope stage 5 to stage 4) could have led not on

229 d between saltier conditions during the cold oxygen isotope stages 2, 4 and 6, and lower salinities d

230 Paleobotanical, paleopedologic, and oxygen isotope studies indicate high temperatures during

231 1) upon oxygen isotope substitution (16O --> 18O leads to T(c) d

232 xchanged into H216O, they can be assigned to oxygen isotope substitution at the C-2 postion.

233 The oxygen isotope technique allowed estimation of mesophyll

234 An online oxygen isotope technique was developed to allow quantifi

235 Evidence from power spectra of deep-sea oxygen isotope time series suggests that the climate sys

236 polar regions on the distribution of marine oxygen isotopes, using an intermediate complexity model.

237 amics of Bi2212 samples containing different oxygen isotopes, using angle-resolved photoemission spec

238 oraminiferal size-specific stable carbon and oxygen isotope values (delta(13)C and delta(18)O, respec

239 ostatistical model to predict human skeletal oxygen isotope values (delta(18)Op) in Britain is presen

240 ct high-resolution temperature records using oxygen isotope values and Mg/Ca ratios in both surface-

241 The oxygen isotope values do correlate with the abundances o

242 n isotope data combined with measurements of oxygen isotope values from the same specimens allow for

243 nges in the calculated aragonite equilibrium oxygen isotope values implies shallow calcification dept

244 We present a 220-year record of oxygen isotope values of alpha-cellulose in longleaf pin

245 It also has bulk oxygen isotope values of Delta(17)O = 0.58 +/- 0.05 per

246 tiliser application rate on the nitrogen and oxygen isotope values of plant-derived nitrate has been

247 temperatures reconstructed from mean otolith oxygen isotope values show little change through this in

248 This is indicated by low oxygen isotope values with strong seasonality in gastrop

249 Here we report the broadest range of oxygen isotope values yet measured in marine sediments (

250 f 1.5 parts per thousand in deep-sea benthic oxygen-isotope values (Oi-1) within a few hundred thousa

251 Here, however, we report oxygen-isotope values of two massive sulphate mineral de

252 We have found similar oxygen isotope variations recorded in mixed-layer-and th

253 Sea level mirrors oxygen isotope variations, reflecting ice-volume change

254 osun), then substantial fractionation of the oxygen isotopes was possible on a timescale of approxima

255 omponent, but the latter can be diagnosed by oxygen isotopes, which are strongly fractionated by rock

256 chondrite inclusions some minerals exchanged oxygen isotopes with an external reservoir following cry

257 and cathodoluminescence imaging and measure oxygen isotopes with an ion probe.

258 a reagent to the water sample and exchanges oxygen isotopes with the water.