ライフサイエンスコーパス: nitrogen isotope

1 ipper egg contamination or stable carbon and nitrogen isotopes.

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

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

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

5 Carbon and nitrogen isotopes analyses were performed on marine mamm

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

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

8 Nitrogen isotope analysis revealed the use of animal man

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

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

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

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

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

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

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

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

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

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

19 Nitrogen isotope delta values comparing precursor with p

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

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

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

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

24 Based upon nitrogen isotope discrimination between diet and kestrel

25 3 and -57.6 per thousand (corresponding to a nitrogen isotope effect Deltadelta(15)N = delta(15)N(sub

26 0.3 per thousand (ametryn/TrzN)) and inverse nitrogen isotope effects (epsilonnitrogen=2.5 per thousa

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

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

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

30 45 and 1.0095 for the amide carbon and amide nitrogen isotope effects, respectively.

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

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

33 Nitrogen isotope fractionation in biological processes o

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

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

36 3(-), and HNO3 concentrations, combined with nitrogen isotope fractionation models, suggests that the

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

53 Nitrogen isotope ratios showed that NH2Cl is the source

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

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

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

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

58 Comparison of the nitrogen isotope record with concomitant carbon accumula

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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