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3 etaproteomic strategy, using in vitro stable isotopically ((15)N) labeled microbiota as a spike-in re
5 ican kestrels (Falco sparverius) were fed an isotopically characterized diet and patterns in delta(15
6 th methods provided that a consistent set of isotopically characterized reference materials is used.
7 tio of 16:0 to 18:2n-6; P = 0.03), which was isotopically confirmed by DNL(Meas) (increased 2.5-fold;
8 ve used the redshifts and line shapes of the isotopically decoupled IR oxygen-deuterium (O-D) stretch
9 m ashes collected in these power plants were isotopically depleted in the heavy isotopes relative to
11 cally enriched, modern DOC cocycling with an isotopically depleted older fraction in the upper ocean.
13 zed, REE-rich fluids, derived from external, isotopically depleted sources, metasomatized the granite
15 The method treats explicitly the cleavage of isotopically different C-Cl bonds and thus considers, si
16 riments were analyzed and calibrated against isotopically different reference standards for both CCl4
18 tion samples collected in Crystal River were isotopically distinct and displayed large negative delta
21 d used, drinking water delta(18)OPO4 appears isotopically distinct from a number of other phosphorus
22 es that the regional background Hg source is isotopically distinct in both Delta(199)Hg and delta(202
23 emisphere lakes show a coherent signal of an isotopically distinct source of N to ecosystems beginnin
24 e show that the subducted flux of uranium is isotopically distinct, with high (238)U/(235)U ratios, a
28 oyed to construct (13)C horizontal line(18)O isotopically edited amides to permit direct observation
29 ed from multiple sets of site-specific (13)C isotopically edited infrared (IR) and circular dichroism
31 e-specific thermal unfolding probed by (13)C isotopically edited IR is likewise consistent with prima
33 Here we present a new strategy that uses isotopically encoded labeling reagents to measure labeli
35 We have illustrated a novel way of using isotopically enhanced two-dimensional NMR spectroscopy t
36 erentially labeled RT was reconstituted from isotopically enriched ((15)N-labeled) p51 and unlabeled
37 ystalline lepidocrocite were reacted with an isotopically enriched (57)Fe(II) solution (0.1 or 1.0 mM
39 This work presents results on synthesis of isotopically enriched (99% (65)Cu) copper oxide nanopart
40 n studies using flow injection analysis with isotopically enriched (99)Ru as a carrier with ICP-MS de
42 GSSG measurement, the sample was spiked with isotopically enriched analogues of the analytes ((310)GS
45 thermally activated delayed fluorescence of isotopically enriched carbon-13 fullerene C(70) ((13)C(7
47 ied out by the chlorination of biphenyl with isotopically enriched chlorine gas, generated by the dir
49 ired and a single spike IDMS procedure using isotopically enriched Cr(VI) provided accurate results.
52 Furthermore, crossover experiments with an isotopically enriched exogenous copper source illustrate
56 oscopy, electrospray mass spectrometry using isotopically enriched hydrogen peroxide, and density fun
58 NMR and MS, including a (13)C-(13)C COSY of isotopically enriched material, degradation, derivatives
59 amine precursors for melanization to produce isotopically enriched pigment "ghosts" and applied 2D (1
62 in) via the (63)Cu(p,n)(63)Zn reaction using isotopically enriched solutions of (63)Cu-copper nitrate
64 nd metal ligand vibrations (identified using isotopically enriched substrates) allow in situ identifi
65 g experiments in biology usually make use of isotopically enriched substrates, with the two most comm
68 enzothiophene-2-boronic acid, which was also isotopically enriched with (11)B, as (10)B is a known ne
74 embrane components, if CO2 was assumed to be isotopically equilibrated with cytosolic water, and the
76 is sufficiently volatile such that it may be isotopically fractionated during incomplete condensation
77 ours of use show that the Hg they contain is isotopically fractionated in a unique pattern during nor
79 l-era Hg pollution, in contrast, is distinct isotopically from preindustrial emissions, suggesting th
80 (South Africa), which reveals a smaller and isotopically heavier flux of dissolved iron to seawater
81 and show that all differentiated bodies have isotopically heavier magnesium compositions than chondri
82 atio determines whether coccolith calcite is isotopically heavier or lighter than abiogenic calcite,
83 The delta(82/76)Se of water-soluble Se is isotopically heavier than delta(82/76)Se of adsorbed Se,
84 otopes were markedly fractionated: straw was isotopically heavier than roots (Delta(114/110)Cdstraw-r
86 thermore, synglacial sedimentary nitrogen is isotopically heavier than the modern atmosphere, requiri
87 achates due to root-induced mobilization was isotopically heavier than the Zn released in the absence
88 shifts of +/- 0.3 per thousand, resulting in isotopically heavier values of +0.05 +/- 0.18 per thousa
89 more than 10,000 petagrams)-and, on average, isotopically heavier-carbon source than considered previ
91 ransformations of Hg phases and suggest that isotopically heavy secondary Hg phases were formed in th
92 cal isotope fractionation cannot explain the isotopically heavy Tl in the Lengerich topsoils and the
93 igands we found preferential partitioning of isotopically heavy zinc in the complexed form, and the e
94 the most mobile and bioavailable, should be isotopically heavy, as light Hg isotopes are preferentia
95 iron within the surface mixed layer becomes isotopically heavy, reflecting the dominance of biologic
97 e magma reservoirs by repeated injections of isotopically heterogeneous magma batches and short pre-e
99 at larger spatial scales, than analyzing the isotopically highly heterogeneous tailing piles typicall
103 O; deuterium oxide) continuously for 6 wk to isotopically label newly synthesized skeletal muscle pro
104 ted by the cyclotron and has the capacity to isotopically label peptides of choice for positron emiss
107 the waterborne uptake and efflux kinetics of isotopically labeled (68)ZnO NPs (7.8 +/- 1.2 nm), in co
108 trix-matched calibration standards and using isotopically labeled (IL) analogues as internal standard
109 rent intravenous (i.v.) microdosing a stable isotopically labeled (SIL) drug was developed and valida
114 luoro-2-propanol, we synthesized a series of isotopically labeled alpha-d-glucopyranosyl fluorides.
115 ounts of starting material with incorporated isotopically labeled amino acids during cell culture.
118 s sampling bag, where it is homogenized with isotopically labeled analogue internal standards and sam
119 ns expressed by a eukaryotic organism can be isotopically labeled and produced with a quality and qua
120 vestigation of a reaction mixture containing isotopically labeled and unlabeled reactants with differ
124 s by hydrolyzing peptidoglycan isolated from isotopically labeled bacterial biomass and used them as
125 ated from (13)COgen, the corresponding (13)C-isotopically labeled beta-ketonitriles were obtained, an
128 thways, the lack of a commercially available isotopically labeled CoA limits the development of rigor
129 e (SILEC) was recently developed to generate isotopically labeled coenzyme A (CoA) and short-chain ac
132 ectrometry experiments using (17)O and (18)O isotopically labeled compounds prove that this compound
139 They consumed a maize meal fortified with isotopically labeled ferrous sulfate (FeSO4; study 1) or
141 ents evaluating the suitability of different isotopically labeled fluorinated depuration compounds (D
142 The isolated phosphoproteins were eluted and isotopically labeled for relative and absolute quantitat
143 evidence that MOB facultatively incorporated isotopically labeled glucose into their cells, and MOB u
144 al by direct and quantitative measurement of isotopically labeled glutathione introduced exogenously
145 nMS for the identification of differentially isotopically labeled heteroconjugates against a complex
148 the methodology is the selection of a stable isotopically labeled internal standard (SIL-IS) for an L
149 have tested different methods of applying an isotopically labeled internal standard for MALDI IMS ana
152 action of the extract, quantitation using an isotopically labeled internal standard, and a short inst
155 Chlorinated and brominated standards and isotopically labeled internal standards were synthesized
156 chromatography, a diastereomeric mixture of isotopically labeled internal standards, and multiple re
159 tes using authentic metabolite standards and isotopically labeled internal standards, whereas the cor
162 mediated disorder-order transitions using 17 isotopically labeled isoleucine methyl groups and three
164 central nervous system proteins with stable isotopically labeled leucine was performed, and kinetics
165 of SFG allowed for independent monitoring of isotopically labeled lipid bilayer leaflets as a functio
167 n, on 2 consecutive days, we fed all infants isotopically labeled maize porridge and MNP test meals c
169 tly, LC/MS-based untargeted metabolomics and isotopically labeled metabolites have been used to facil
170 tabolomic technologies to track the fates of isotopically labeled metabolites in a global, unbiased m
174 Mass spectrometry of the reaction between isotopically labeled mu-(16)O(bridging-oxo) 1A(+) and (1
175 was used to follow the trafficking of stable isotopically labeled n-3 fatty acids into phosphatidylch
176 ammonium-free media, and fail to incorporate isotopically labeled N2 gas into biomass in multiple ind
180 incubated for a fixed amount of time with an isotopically labeled nutrient that was incorporated into
182 tual replacement of radiotracers with stable isotopically labeled ones, even for adult clinical inves
183 in situ infrared (IR) spectroscopy and with isotopically labeled oxygen ((18)O), appears to be criti
190 3)C and (15)N solid-state NMR experiments on isotopically labeled PLP aldimines formed by lyophilizat
196 requires little protein, avoids the need for isotopically labeled protein, and has no protein molecul
198 tended for the analysis of experiments using isotopically labeled reference peptides for absolute qua
200 BLUF domain (AppA(BLUF)) reconstituted with isotopically labeled riboflavin (Rf) and flavin adenine
201 ains is achieved using a stalling motif, and isotopically labeled RNCs are produced at high yield usi
202 Here, we present a strategy to generate isotopically labeled RNCs in Escherichia coli that are s
205 nce (ENDOR) measurements with (13)C and (2)H isotopically labeled SAMCA support a pi-complex between
206 py spin-lattice relaxation experiments using isotopically labeled samples and with the analysis of va
207 presence of native lipids, we have prepared isotopically labeled samples of precipitated DsbB (WT an
208 ptides that were obtained from unlabeled and isotopically labeled soybean embryos and Escherichia col
210 by reproducible and uniform deposition of an isotopically labeled standard peptide from a target prot
213 ling by mass spectrometry generally requires isotopically labeled standards chemically representative
215 a previously reported catalytic system using isotopically labeled substrates are consistent with the
217 ies on commercial cross-linkers that bear an isotopically labeled tag and N-hydroxysuccinimid-ester (
219 c clamp procedure in conjunction with stable isotopically labeled tracer infusions to measure glucose
221 ified by 9.5 and 140 GHz EPR spectroscopy on isotopically labeled varieties of the protein to be a th
222 beled tyrosine substrates, the cyanides were isotopically labeled via a recently developed in vitro m
224 arbon-hydrogen bonds in a single step, using isotopically labeled water (D2O or T2O) as the source of
225 temperature-programmed desorption (TPD) with isotopically labeled water and oxygen species, reactive
228 surements, maltose binding protein (MBP) was isotopically labeled with (13)C and (15)N, permitting dy
230 tion of aqueous solutions of ferrous sulfate isotopically labeled with (5)(4)Fe, (5)(7)Fe, or (5)(8)F
231 otocol, control and experimental samples are isotopically labeled with 95 and 5% (13)C, and the two s
233 ed, hydroxylated), and labeled (fluorinated, isotopically labeled) side chains to be added to a commo
234 l can be applied to any organism that can be isotopically labeled, making it a powerful new tool in a
237 rial are needed and kinetic measurements for isotopically "labeled" and "unlabeled" species are acqui
239 nation on an UPLC/ESI-MS system by using its isotopically labelled analogue as internal standard, all
240 resent the first report using broad-spectrum isotopically labelled standards for quantitative charact
245 h system, where rapid and massive release of isotopically light carbon led to a major perturbation in
246 with previous studies, but an enrichment of isotopically light Cu, suggesting a reduction of Cu(II)
248 vents in the North Atlantic are a source of isotopically light iron, which travels thousands of kilo
250 these excursions involve remineralization of isotopically light organic matter and imply strong enhan
252 s are the geogenic background, as defined by isotopically light soils at depth (epsilon(205)Tl approx
254 iments on mare basalt 14053 demonstrate that isotopically light Zn condensates also occur on some mar
255 her hydrologic activity a higher wash out of isotopically lighter nitrate formed by bacterial nitrifi
256 8 +/- 0.6 per thousand) due to the inflow of isotopically lighter oil (-27 +/- 0.2 per thousand).
257 pth indicating the preferential migration of isotopically lighter Se downward through the soil profil
258 f -0.15 per thousand with the adsorbed U(VI) isotopically lighter than coexisting aqueous U(VI).
259 ntial dissolved flux to the oceans, which is isotopically lighter than the crust, and so may be disti
261 ns, the Cu flowing out of the wetland became isotopically lighter, indicating the mobilization of red
262 se has not been validated by comparison with isotopically measured de novo lipogenesis (DNL(Meas)).
266 13)C record, and consequent contributions of isotopically negative terrestrial organic matter to the
267 oth steady-state metabolic flux analysis and isotopically non-stationary metabolic flux analysis.
269 een aqueous Fe(2+) and magnetite by reacting isotopically "normal" magnetite with (57)Fe-enriched aqu
271 tron and nuclear spins of donor ensembles in isotopically pure silicon experience a vacuum-like envir
274 be attainable for singlet-triplet qubits in isotopically purified Si, and for hybrid qubits in natur
276 onized ICR cell, i.e., ParaCell, for mapping isotopically resolved intact proteins up to about 17 kDa
277 transfer to the LTQ Orbitrap XL instrument, isotopically resolved mass spectra could be acquired.
279 ion of metal cations and ligands can also be isotopically resolved with the ultrahigh mass resolution
280 in these ratios indicates specialisation on isotopically restricted resources, which may drive the s
281 This phenomenon becomes more pronounced for isotopically rich compounds, such as those containing su
282 nene are assessed in light of the results of isotopically sensitive branching experiments with the H3
283 ity to perform not only elementally but also isotopically sensitive detection and analysis at standof
286 +/- 5.7 J mol(-1) K(-1)) to a species 3 with isotopically sensitive stretches at nuO-O(Delta(18)O) =
287 connectivity, but could arise if species use isotopically similar resources at different locations.
288 udies has gradually expanded to include both isotopically steady-state and transient labeling experim
291 ange neutron diffraction measurements of H/D isotopically substituted solutions of decyltrimethylammo
293 how how multidimensional NMR spectroscopy of isotopically tagged molecules enables structure characte
295 titative chemoproteomic platform, which uses isotopically tagged, photocleavable azido-biotin reagent
298 e tracer was mixed with different amounts of isotopically unmodified flumazenil (4, 20, 100, or 400 m
299 d on the assumption that metabolic pools are isotopically well mixed and in equilibrium with dietary
300 ical artifacts contain cinnabar that matches isotopically with cinnabar ores from Huancavelica, Peru,
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