ライフサイエンスコーパス: carbon-13

1 f heavy, natural abundance isotopes, such as carbon-13.

2 In this study, we used hyperpolarized carbon 13 ((13)C)-labeled pyruvate magnetic resonance sp

3 emission tomography (PET) and hyperpolarized carbon 13 ((13)C)-pyruvate magnetic resonance (MR) spect

4 young and old men by using uniformly labeled carbon-13 ((13)C) fatty acids.Six young ( approximately

5 Using hyperpolarized carbon-13 ((13)C)-magnetic resonance spectroscopy, in vi

6 Carbon-13 (13C) solid-state nuclear magnetic resonance (

7 8.1 containing a bicyclo[1.1.0]butyl ring on carbons 13-16, and the minor product as 9R,10R-epoxy-11t

8 s are labeled by modulating their content of carbon-13 and labeled fragments identified from the dist

9 ched by about 20% in the NMR-active isotopes carbon-13 and nitrogen-15.

10 six brazzein proteins labeled uniformly with carbon-13 and nitrogen-15.

11 r glucose concentrations were measured using carbon-13 and phosphorous-31 nuclear magnetic resonance

12 e-6-phosphate concentration were measured by carbon-13 and phosphorus-31 nuclear magnetic resonance s

13 vel nuclear magnetic resonance approach with carbon-13 and phosphorus-31 to measure intramuscular glu

14 actors, circular dichroism measurements, and carbon-13 and proton chemical shift index values.

15 ith either natural isotopes or enriched with carbon-13, and mass spectrometry analysis.

16 zed reactions of glycolaldehyde labeled with carbon-13 at the carbonyl carbon ([1-(13)C]-GA) at pD 7.

17 the reaction of glycolaldehyde labeled with carbon-13 at the carbonyl carbon ([1-(13)C]-GA) catalyze

18 Stable carbon ((13)C) and radiocarbon ((14)C) isotopic data dem

19 todissociation and sputtering enriches heavy carbon ((13)C) in the Martian atmosphere, partially comp

20 We measured carbon ((13)C/(12)C) and nitrogen ((15)N/(14)N) isotope

21 The shallow-water organic-carbon (13)C content has a 29 per thousand range in valu

22 Carbon (13)C/(12)C isotope amount ratios have been measu

23 Because carbonyl carbons ((13)C') suffer from serious relaxation enhancem

24 3)C NMR shieldings of all the imidazole ring carbons ((13)C(gamma), , and ) for each of the two tauto

25 orts using the AA isotopologue deuterated at carbon 13 (C13).

26 PO2-, (CD3CH2O)2PO2- and (CD3CD2O)2PO2-] and carbon-13 [(CH3 13CH2O)2PO2-] derivatives in the stable

27 Carbon-13 chemical shift anisotropy (CSA) tensors for va

28 contemporary carbon-14 samples with varying carbon-13 concentrations were used to assess the method

29 be distinguishable from fragments of natural carbon-13-content proteins.

30 The higher value of carbon-13 delta(iso) in alkylidene complexes relative to

31 Carbon-13 discrimination (Delta), corrected for backgrou

32 data obtained from laboratory experiments on carbon-13 discrimination by vascular land plants and mar

33 uits and leaves but also large quantities of carbon-13-enriched foods such as grasses and sedges or a

34 onstrated for identification of fragments of carbon-13-enriched glutathione transferase within a comp

35 We show that carbon-13 enrichment to just 2.3% of total carbon (about

36 o[2.2.2]diazaoctane structural unit) through carbon-13 feeding studies, support the existence of a co

37 nuclear magnetic resonance spectroscopy, and carbon-13 feeding studies.

38 elayed fluorescence of isotopically enriched carbon-13 fullerene C(70) ((13)C(70)).

39 mum(2) spatial resolution and hyperpolarized carbon-13 images with 250 x 250 mum(2) in-plane spatial

40 We measured carbon 13 incorporation into brain glutamate and glutami

41 eta-oxidation to carbon dioxide labeled with carbon-13 increased from 0.085% of dose/h at baseline to

42 o-IRMS) was used to simultaneously determine carbon 13 isotope ratio (delta(13)C) of organic acids, g

43 Carbon-13 isotope effects have been determined for all f

44 The efficient incorporation of two carbon-13 isotopes into phenethylamines was accomplished

45 entification is facilitated by resolution of carbon-13 isotopic distributions.

46 Carbon-13 isotopic labeling studies show that both carbo

47 labeled version generated the corresponding carbon-13 labeled benzophenones.

48 ursor, in the CO-producing chamber, with its carbon-13 labeled version generated the corresponding ca

49 ed in an older population by using uniformly carbon-13-labeled DHA ((13)C-DHA).

50 Experimentally, 2,3-carbon-13-labeled diacetyl has a disconnected eigenstate

51 The uniformly carbon-13-labeled EPA concentration was 2.6 times as hig

52 Carbon-13-labeled graphite can be used to prepare chemic

53 In amorphous carbon-13-labeled PET, the statistics of the O-13CH2-13C

54 Carbon-13--labeled glucose and glycogen were detected in

55 or 24 hr in LPD solution with the following carbon-13--labeled substrates: 5 mM glucose (Perfadex gr

56 results from deuterium exchange experiments, carbon-13 labeling experiments, (1)H NMR monitoring stud

57 Carbon-13 labeling of the aromatic ring positions of tyr

58 ally, the method was applied to the specific carbon-13 labeling of the beta-amyloid binding compound,

59 Carbon-13 labeling of the Phe residue of penetratin was

60 Carbon-13 labeling studies showed that the (13)C NMR che

61 experiments, and other methods that rely on carbon-13 labeling.

62 A fully carbon-13-labelled internal standard was used to compens

63 ith endoscopy at 1, 3, and 6 months and with carbon-13-labelled urea breath test at 3 months.

64 H. pylori status was assessed by the carbon-13-labelled urea breath test.

65 Hyperpolarized carbon-13 magnetic resonance is a new metabolic imaging

66 re removed and frozen in liquid nitrogen for carbon-13 magnetic resonance spectroscopic (MRS) analysi

67 Nitrogen-15 backbone and carbon-13 methyl NMR relaxation was measured to investig

68 ular imaging using hyperpolarized proton and carbon-13 MRI contrast media and low-field (47.5 mT) pre

69 core 1 chains, a value in agreement with the carbon-13 NMR analysis of the native mucin.

70 Carbon-13 NMR analysis shows that all four compounds are

71 e in CDCl3 to afford high-quality proton and carbon-13 NMR data.

72 Carbon-13 NMR line shape changes are attributed to inver

73 Carbon-13 NMR line shape changes indicate that the syste

74 Carbon-13 NMR shows that all of the above compounds are

75 erate valence tautomers, was investigated by carbon-13 NMR spectroscopy at a range of temperatures in

76 irmed by [(11/13)C]colabeling and subsequent carbon-13 NMR spectroscopy.

77 Alternatively, carbon-13 nuclear magnetic resonance ((13)C NMR) is a fa

78 traditional theory, an interpretation of new carbon-13 nuclear magnetic resonance measurements of the

79 We have obtained the carbon-13 nuclear magnetic resonance spectra of a series

80 ar spin polarization (%PH ) of ca. 3.3 % and carbon-13 polarization (%P13C ) of ca. 1.8 % were achiev

81 lated to the presence of a side chain at the carbon 13-position, to the addition of a xylosyl group a

82 d over a range of 30 percent for the various carbon-13 positions.

83 We employed a carbon-13 pulse-chase experiment to investigate how a te

84 n was labeled uniformly with nitrogen-15 and carbon-13 so that its conformation could be determined i

85 neighboring spins in both phosphorus-31 and carbon-13 spectra.

86 Carbon-13 spectroscopy promises to be a useful method fo

87 selectively initialize, control and read out carbon-13 spins in the surrounding spin bath and constru

88 istic of archaea are so strongly depleted in carbon-13 that methane must be the carbon source, rather

89 droxyacetone (DHA) to deliver hyperpolarized carbon-13 to the perfused mouse liver.

90 Amplex glucose assay, fluorescence and carbon-13 tracing studies demonstrate that FAK promotes

91 aining molecules, including those containing carbon-13 using platinum and boron-doped diamond (BDD) e