ライフサイエンスコーパス: nitrogen isotope

1 on of NH(4)(+) source apportionment by using nitrogen isotopes.

2 ipper egg contamination or stable carbon and nitrogen isotopes.

3 cribe the basic protocol and results for the nitrogen isotopes.

4 Here we report measurements of the nitrogen isotope ((15)N/(14)N) ratio of coral-bound orga

5 couple records of ocean redox chemistry with nitrogen isotope ((15)N/(14)N) values from approximately

6 >10 per mille increase in foraminifera-bound nitrogen isotopes ((15)N/(14)N) since the late Miocene (

7 strongly favors the formation of the heavier nitrogen isotope, (15)N.

8 Stable carbon and nitrogen isotope analyses are widely used to infer diet

9 ered from PPNB Jericho for stable carbon and nitrogen isotope analyses for dietary investigations.

10 n of Neandertals' diets has mostly relied on nitrogen isotope analyses of bone and tooth collagen.

11 ultiple chemical analyses: stable carbon and nitrogen isotope analyses of total organic matter (expre

12 Carbon and nitrogen isotopes analyses were performed on marine mamm

13 the utility of amino acid compound-specific nitrogen isotope analysis (AA-CSIA) in avian studies is

14 Existing techniques for nitrogen isotope analysis allow the determination of del

15 ved nitrate, has been applied alongside bulk nitrogen isotope analysis for discrimination between org

16 Stable carbon and nitrogen isotope analysis from archaeological human and

17 Here we use stable carbon and nitrogen isotope analysis of bone collagen to reconstruc

18 To do so, we deploy stable carbon and nitrogen isotope analysis of plants and animals.

19 Stable carbon and nitrogen isotope analysis of Siberian dogs reveals that

20 Nitrogen isotope analysis revealed the use of animal man

21 rea) are stable and sufficiently precise for nitrogen isotope analysis.

22 were developed and validated for carbon- and nitrogen-isotope analysis (delta(13)C and delta(15)N) of

23 Here, we report new carbon and nitrogen isotope and concentration data from the Nanhua

24 of ocean circulation and is consistent with nitrogen isotope and redox proxy data.

25 nced by dietary evidence based on carbon and nitrogen isotopes and an increasingly high chronological

26 d with other oligotrophic locations, and the nitrogen isotope budgets indicate that N2fixation suppor

27 dditionally, using evidence from silicon and nitrogen isotope changes, we infer that, in contrast to

28 Nitrogen isotope composition (delta(15)N) was measured i

29 eristics through the analysis of Delta(13)C, nitrogen isotope composition (delta(15)N), nitrogen cont

30 The stable nitrogen isotope composition (expressed by delta(15)N) i

31 Here we reviewed the stable carbon and nitrogen isotope composition of 390 human individuals fr

32 benthic solute fluxes and the corresponding nitrogen isotope composition of nitrate and ammonium flu

33 charias), by measuring the stable carbon and nitrogen isotope composition of vertebral growth bands t

34 d DOC), DOC concentration, stable carbon and nitrogen isotope composition, and optical measurements.

35 role in this evolutionary event, we measured nitrogen isotope compositions (delta(15)N) of marine car

36 molecular preservation and stable carbon and nitrogen isotope compositions of AMS-dated common reeds

37 We used stable carbon and nitrogen isotope, contaminant, and behavioral data in co

38 These data, combined with the carbon and nitrogen isotope contents of the diamonds, indicate that

39 hly resolved records of coral skeleton-bound nitrogen isotopes (CS-delta(15)N) to reconstruct denitri

40 ctions in NPP, causes detectable declines in nitrogen isotopes (d(15)N) and constitutes the primary p

41 Here we present new stable carbon and nitrogen isotope data from 86 human and 68 animal remain

42 eciation, redox-sensitive trace element, and nitrogen isotope data from a Neoproterozoic (Marinoan) g

43 However, few nitrogen isotope data have been recovered from bones or

44 The interpretation of our nitrogen isotope data in the context of iron speciation

45 ical package was used to model bone collagen nitrogen isotope data of individuals, quantitatively est

46 Nitrogen isotope delta values comparing precursor with p

47 We measured nitrogen isotope (delta(15) N) and digestive enzyme plas

48 , we measured the naturally occurring stable nitrogen isotope (delta(15) N) patterns that differentia

49 e role of kinetic vs equilibrium controls on nitrogen isotope (delta(15)N) fractionation between NH(3

50 We measured stable carbon and nitrogen isotopes (delta(13)C and delta(15)N) of coeval

51 our study, we used the natural abundances of nitrogen isotopes (delta(15)N values) of individual amin

52 Here, we present a forty-year record of nitrogen isotopes (delta(15)N) of intra-crystalline cora

53 s vesiculosus and Ulva sp. were analysed for nitrogen isotopes (delta(15)N).

54 f log MeHg versus relative trophic position (nitrogen isotopes, delta(15)N), but regression slopes va

55 mplemented by detection of N2 O released and nitrogen isotope determinations of fern biomass.

56 Based upon nitrogen isotope discrimination between diet and kestrel

57 3 and -57.6 per thousand (corresponding to a nitrogen isotope effect Deltadelta(15)N = delta(15)N(sub

58 nce of Fe and Cu availability on the kinetic nitrogen isotope effect in ammonia oxidation ((15)epsilo

59 The proportionality of oxygen-to-nitrogen isotope effects ((18)epsilon/(15)epsilon) is us

60 0.3 per thousand (ametryn/TrzN)) and inverse nitrogen isotope effects (epsilonnitrogen=2.5 per thousa

61 The observed nitrogen isotope effects for the ammonia leaving group [

62 ragine at pH 8.0, the amide carbon and amide nitrogen isotope effects have values of 1.0231 and 1.022

63 Previously, inverse nitrogen isotope effects in atrazine degradation by Arth

64 45 and 1.0095 for the amide carbon and amide nitrogen isotope effects, respectively.

65 e time period from 2.8 to 2.6 Ga, termed the Nitrogen Isotope Event (NIE), might be explained by aero

66 range of Precambrian delta(15)N values, the Nitrogen Isotope Event.

67 Here, we report nitrogen-isotope evidence that modern-like upwelling occ

68 ve solution to access labeled pyridines by a nitrogen isotope exchange reaction based on a Zincke act

69 tope fractionation and a significant inverse nitrogen isotope fractionation (>10 per mille) during ae

70 elationship between the pattern in oxygen vs nitrogen isotope fractionation ((18)e/(15)e) suggests th

71 le electron transfer generated large inverse nitrogen isotope fractionation (epsilonN = +5.7 per thou

72 aerobic sediment-water system showed strong nitrogen isotope fractionation (epsilonN = -7.1 per thou

73 Conversely, normal nitrogen isotope fractionation at pH 10 (epsilon(N) = -0

74 An inverse nitrogen isotope fractionation at pH 3 (epsilon(N) = +0.

75 The inverse nitrogen isotope fractionation at pH 7 indicated that th

76 Nitrogen isotope fractionation in biological processes o

77 fractionation was generally small, observed nitrogen isotope fractionation in degradation by MnO2 (e

78 The present study surveys carbon and nitrogen isotope fractionation in other environmental an

79 3(-), and HNO3 concentrations, combined with nitrogen isotope fractionation models, suggests that the

80 uct analysis with the significant carbon and nitrogen isotope fractionation suggests that aromatic mo

81 occus) = -3.8 +/- 0.2 per thousand), whereas nitrogen isotope fractionation was small.

82 a freshwater lake on the island, and stable nitrogen isotopes from mammoth remains.

83 We analyzed time series of stable nitrogen isotopes from the sediments of 20 sockeye salmo

84 It represents the first study of nitrogen isotope in Vitis labrusca grapes.

85 We analyzed sterols together with stable nitrogen isotopes in dated pond sediment cores to show t

86 B proxy based on photolytic fractionation of nitrogen isotopes in nitrate observed at 114 sites throu

87 nored in explaining the natural abundance of nitrogen isotopes in PUCs.

88 We measured noble gas and nitrogen isotopes in Ryugu samples and found that they a

89 Foraminifera-bound nitrogen isotopes indicate that the tropical North Pacif

90 Using a suite of nitrogen isotope labeling experiments, we show that mult

91 ble water isotope ([Formula: see text]O) and nitrogen isotope measurements from Greenland ice cores:

92 Here, high-resolution diatom-bound nitrogen isotope measurements from the Indian sector of

93 o mass-spectrometry) analysis for carbon and nitrogen isotope measurements of diclofenac.

94 Here, we present stable carbon and nitrogen isotope measurements of human bone collagen, an

95 Here, we used high-sensitivity nitrogen isotope methods to assess the (15)N/(14)N ratio

96 Compound-specific nitrogen isotopes of amino acids (delta(15)N-AA) separat

97 ovide a basis for reliable interpretation of nitrogen isotopes of amino acids of fossils.

98 Nitrogen isotopes of amino acids were used to investigat

99 Here, we collated nitrogen isotopes of atmospheric NH(3) and NH(4)(+) and

100 We conducted measurements of nitrogen isotopes of individual amino acids (delta (15)N

101 We studied the carbon and nitrogen isotopes of Northern Great Plains bison from th

102 The nitrogen isotopes of the organic matter preserved in fos

103 s study examined the potential of carbon and nitrogen isotopes of wine solid residues with semi-quant

104 on of the heavy carbon, hydrogen, oxygen and nitrogen isotopes on the bacterium E. coli and the enzym

105 suggest that caution is warranted when using nitrogen isotopes or metal concentrations measured in on

106 The nitrogen isotope ratio (expressed as delta(15)N) of red

107 Regressing serum CIR on the APR, serum nitrogen isotope ratio (NIR), gender, age, and body weig

108 We measured the stable nitrogen isotope ratio in the forages and in the longiss

109 se-dependent response in lamb meat of stable nitrogen isotope ratio to the dietary proportion of legu

110 phorus, potassium, and boron concentrations, nitrogen isotope ratio, and lower carbon isotope ratio (

111 Here we present nitrogen isotope ratio, nitrogen content and chlorin abu

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

113 f Eurasian Neanderthal diets based on stable nitrogen isotope ratios (delta(15)N) typically place hom

114 Stable nitrogen isotope ratios (delta(15)N) were used as a meas

115 Nitrogen isotope ratios (delta(15)N) were used as proxie

116 alyzed a 40 year fish archive for carbon and nitrogen isotope ratios and amino acid-specific nitrogen

117 Stable carbon and nitrogen isotope ratios for all three individuals were w

118 We report on stable carbon and nitrogen isotope ratios from 74 individuals from ninetee

119 Carbon and nitrogen isotope ratios in hair sampled from 65 communit

120 s conclusion was primarily based on elevated nitrogen isotope ratios in Neandertal bone collagen and

121 t, nitrogen, carbon, and amino acid specific nitrogen isotope ratios in six species distributed acros

122 Stable carbon and nitrogen isotope ratios in the skeletal elements of both

123 stically identical intra-specific carbon and nitrogen isotope ratios in winter grown feathers.

124 Stable carbon and nitrogen isotope ratios of collagen from bone and dentin

125 Nitrogen isotope ratios showed that NH2Cl is the source

126 xic Event (OAE 2) are characterized by lower nitrogen isotope ratios than are seen in modern marine s

127 In contrast, all extinct cycad genera have nitrogen isotope ratios that are indistinguishable from

128 Here we present nitrogen isotope ratios with a mean of 0.0 +/- 1.2 per t

129 e-sieved seston, dietary tracers (carbon and nitrogen isotope ratios), phytoplankton methylmercury bi

130 showed significant differences in carbon and nitrogen isotope ratios, demonstrating a further potenti

131 Here, we use foliar nitrogen isotope ratios-a proxy for N(2) fixation in mod

132 rogen isotope ratios and amino acid-specific nitrogen isotope ratios.

133 Here we use nitrogen-isotope ratios of porphyrins to show that eukar

134 Comparison of the nitrogen isotope record with concomitant carbon accumula

135 enges earlier interpretations of the ancient nitrogen isotope record, predicts a more substantial rol

136 -anoxic conditions in bottom waters, whereas nitrogen isotopes record aerobic nitrogen cycling perhap

137 hotosynthetic pathways, respectively; stable nitrogen isotopes record regional patterns related to ar

138 Analysis of stable carbon and nitrogen isotopes showed that this chemoautotrophic prod

139 roportion of legumes, and the ability of the nitrogen isotope signature of the meat to authenticate m

140 at a contaminated site where the carbon and nitrogen isotope signatures from field samples suggested

141 multi-individual (n = 11), stable carbon and nitrogen isotope study of bone collagen (delta(13)C(col)

142 of the 8th century B.C., we applied a stable nitrogen isotope test to infer the paleodiet of the king

143 Here we used stable carbon and nitrogen isotopes to detect changes in mammal resource a

144 We used carbon and nitrogen isotopes to investigate changes in the diet of

145 Here, we use stable carbon and nitrogen isotopes to study the foraging history of a gen

146 Here we applied nitrogen isotope tracer incubations to measure N(2)O pro

147 y exist, changes over time in the carbon and nitrogen isotope tracers reflected a shift of the gull d

148 This nitrogen isotope transmutation occurs through activation

149 rent instrumental uncertainties on carbon or nitrogen isotope values ( 1%) with an additional 1% at m

150 Analysis of stable carbon and nitrogen isotope values (delta(13)C and delta(15)N) of a

151 AS (C >= 10) were positively correlated with nitrogen isotope values (delta(15)N) and total mercury i

152 formed mercury (Hg) concentration and stable nitrogen isotope values (delta(15)N), hereafter called t

153 aroo, while Ruens and Feedlot had the lowest nitrogen isotope values (P</=0.05).

154 (Hg) levels were assessed as were egg stable nitrogen isotope values as an indicator of dietary chang

155 Nonetheless, invariant carbon and nitrogen isotope values confirmed that BAM was neither d

156 Here we report that the stable carbon and nitrogen isotope values for the hair of the 5200 year-ol

157 In contrast, nitrogen isotope values may be rather indicative of diff

158 We analyzed carbon and nitrogen isotope values of 1,002 skin samples from six g

159 llion-year-old Mount McRae Shale, Australia, nitrogen isotope values vary from +1.0 to +7.5 per mil (

160 ors (e < -0.4 %), with changes in carbon and nitrogen isotope values within 0.5% and 1%, respectively

161 as adults exhibited unexpectedly low stable nitrogen isotope values, indicating prolonged consumptio

162 relies on the observation that similar high nitrogen isotopes values could also be the result of the

163 erties; carbon, nitrogen, phosphorus ratios, nitrogen isotopes), variation was also associated with m

164 Using stable nitrogen isotopes, we quantified the positions in the fo