ライフサイエンスコーパス: DOM

1 DOM fluorescence (EEM-PARAFAC) indicated the chicken lit

2 DOM from surface waters, wastewater effluent, and 1 kDa

3 DOM in the column influent facilitated the transport of

4 DOM resulting from both N enrichments was more labile an

5 DOM sulfurization likely represents another link between

6 DOM thought to be of a more refractory nature, such as d

7 DOM transformations by supraglacial microbes are not wel

8 DOM was characterized by absorption and fluorescence spe

9 DOM was found to greatly inhibit Hg methylation by G.

10 Finally, PhiRI for (1)O2 and (3)DOM* correlated negatively with antioxidant activity (a

11 arding quantum efficiencies for (1)O2 and (3)DOM* production but in concert for fluorescence and (*)O

12 reas CTC, ROX, and SMX were sensitized by (3)DOM* and (1)O2.

13 tramolecular oxidation of DOM moieties by (3)DOM*.

14 Decreasing [(3)DOM]ss with molecular weight is shown to derive from ele

15 formation is, in general, decoupled from (3)DOM* and (1)O2 formation, providing supporting evidence

16 r weight fractions, rather than increased (3)DOM formation.

17 such as triplet dissolved organic matter ((3)DOM) and singlet oxygen ((1)O2), contributes to the degr

18 ates of dissolved natural organic matter ((3)DOM*) and the efficiency of (3)DOM* formation (the appar

19 cited states of dissolved organic matter ((3)DOM*), singlet oxygen ((1)O2), and the hydroxyl radical

20 r-derived DOM generated similar levels of (3)DOM* and (1)O2, enhancing degradation of CTC, ROX, and S

21 ic matter ((3)DOM*) and the efficiency of (3)DOM* formation (the apparent quantum yield, AQYT).

22 Here, the reactivity of (3)DOM* in stormflow samples collected from watersheds with

23 Quantum yields of (3)DOM, measured by electron and energy transfer probes, an

24 ygen ((1)O2), DOM triplet excited states ((3)DOM*), and the hydroxyl radical ((*)OH).

25 ation, providing supporting evidence that (3)DOM* is not a (*)OH precursor.

26 ewater-impacted stream, and the second was a DOM isolate.

27 erentially adsorbed relative to UV-absorbing DOM.

28 een RI-optical property relationships across DOM samples of diverse sources.

29 Additionally, DOM and glutathione greatly decreased Hg sorption by G.

30 citly accounts for the unfolding of adsorbed DOM.

31 Sulfurization may affect DOM-trace metal interactions, including complexation and

32 nto the composition and fate of agricultural DOM in natural and engineered systems.

33 The impacts of agricultural DOM on photodegradation of antibiotics were identified i

34 vely related to an index for microbial/algal DOM content and negatively related to DOM molecular weig

35 Both autochthonous and allochthonous DOM is highly bioavailable and is transformed by residen

36 Spectra extracted from allochthonous DOM were highly similar.

37 or engineered treatment processes that alter DOM molecular weight, such as photooxidation and biologi

38 stimulated bulk phytoplankton, bacterial and DOM production and enriched Synechococcus and Flavobacte

39 mical composition, elemental, inorganic, and DOM-bound Hg (Hg(0), Hginorg, HgDOM).

40 ssolution of iron, associated nutrients, and DOM.

41 Experiments with model sensitizers and DOM isolates revealed that reactions with hydroxyl radic

42 icultural, human developed impact on aquatic DOM was most evident through increased levels of a micro

43 (>450 Da), oxygen-rich, and highly aromatic DOM molecules of terrestrial origin.

44 d on specific UV-absorption (SUVA), aromatic DOM was preferentially adsorbed.

45 torage or even sink for terrigenous aromatic DOM compounds.

46 l frequently investigated materials, such as DOM isolated from fresh water, DOM in whole-water sample

47 g and HgDOM strongly depended on the assumed DOM composition.

48 actor Analysis (PARAFAC) modeling attributed DOM samples to specific contamination traits.

49 y of overall allochthonous and autochthonous DOM as well as associated DBP formation are changed duri

50 Allochthonous and autochthonous DOM shared some spectra, but included unique components.

51 was 150 to 200 Da higher than for an average DOM molecule.

52 body of experiments on interactions between DOM and ENPs and also larger particles.

53 A strong seasonal cycle of bioavailable DOM export was observed that correlated with discharge,

54 The chemical composition of bioavailable DOM was different among rivers reflecting unique charact

55 nts alter deep-ocean budgets of bioavailable DOM, creating organic-rich habitats for benthic life.

56 se of the sheer numerical complexity of both DOM molecules and microorganisms.

57 omine substitution of chlorine leading to Br-DOM.

58 or the inhibition of TMP photodegradation by DOM.

59 absorption of ultraviolet radiation (UV) by DOM decreases the valuable ecosystem service wherein sun

60 -component EEM-PARAFAC model to characterize DOM extracted from poultry litter.

61 on, the ability of FT-ICR MS to characterize DOM subpopulations provides unique insight into the mech

62 ution of unaltered DOM sites and chlorinated DOM moieties.

63 production of optically active chromophoric DOM (CDOM) and a subset of fluorescent DOM (FDOM) has no

64 HOBr by direct bromination leading to Br-Cl-DOM and by bromine substitution of chlorine leading to B

65 lorine, Cl-substituted functional groups (Cl-DOM) are reacting with HOBr by direct bromination leadin

66 Here, the authors estimate that the current DOM C stock in China is 925 +/- 54 Tg and that it grew b

67 Poultry litter-derived DOM generated lower concentrations of reactive species c

68 Solutions containing poultry litter-derived DOM generated similar levels of (3)DOM* and (1)O2, enhan

69 trophic processing of plant and soil-derived DOM resulted in major inputs of bacterial detritus, and

70 al triplet lifetime and PhiISC for different DOM isolates and natural waters were quantified; values

71 of bacteria and the diffusivity of different DOM substances, and within each population, the growth b

72 ols and monitoring phenol dynamics in dilute DOM samples.

73 Each DOM addition was coupled with an inorganic nutrient trea

74 changes in the chemical composition of each DOM source following sunlight exposure.

75 Sulfur-enriched DOM in sediment pore waters exchanges with overlying sur

76 monium, tracking planktonic carbon fixation, DOM production, DOM composition and microbial community

77 horic DOM (CDOM) and a subset of fluorescent DOM (FDOM) has not been previously investigated in detai

78 revealed the changing nature of fluorescent DOM composition.

79 ontained a biologically reactive fluorescent DOM component, identified as the nonhumic, biologically

80 Fluorescing DOM was preferentially adsorbed relative to UV-absorbing

81 e compounds, with potential implications for DOM photochemistry.

82 .04, 3.20 +/- 0.03 and 3.50 +/- 0.12 kDa for DOM-associated Fe in the three samples (+/-95% CI).

83 ed dissolved organic matter (MW-fractionated DOM) in the catchment and coastal plume of a small peat-

84 alytical thiol quantification in groundwater DOM.

85 Hg-DOM complexation was modeled using three approaches: bin

86 ly 3.72 wt %) soil for all species except Hg-DOM.

87 DOM inhibits Hg methylation due to strong Hg-DOM complexation.

88 This work suggests that the Hg-DOM species presents the greatest potential for vertical

89 ion without DOM) and landfill leachate (high DOM content and high ionic strength) influent conditions

90 ltraviolet absorbance (SUVA254)), and Hg(II)-DOM and Hg(II)-DOM-sulfide equilibration times (4-142 h)

91 The Hg(II)-DOM or Hg(II)-DOM-sulfide equilibration times did not si

92 The Hg(II)-DOM species had the highest mobility among the four Hg s

93 h and aggregation or the formation of Hg(II)-DOM thiol complexes with high bioavailability.

94 rbance (SUVA254)), and Hg(II)-DOM and Hg(II)-DOM-sulfide equilibration times (4-142 h).

95 The Hg(II)-DOM or Hg(II)-DOM-sulfide equilibration times did not significantly in

96 ze the structural order of mercury in Hg(II)-DOM-sulfide systems for a range of sulfide concentration

97 ionships between the individual compounds in DOM and the members of the ocean microbiome that produce

98 se data suggest that widespread increases in DOM and consequent browning of surface waters reduce the

99 ntify electron-donating phenolic moieties in DOM by determining the number of electrons that these mo

100 A vast number of compounds are present in DOM, and they play important roles in all major element

101 with glutathione, suggesting that thiols in DOM likely played an essential role in affecting microbi

102 Stormflow DOM reflects variability in DOM quantity and composition as a function of land cover

103 etermined how between ecosystem variation in DOM composition related to watershed size, land use and

104 Spatial variation in DOM sulfur content and speciation reflects the degree of

105 oxic environments can substantially increase DOM's reduced sulfur functional group content.

106 th aqueous sulfide increased with increasing DOM aromatic-, carbonyl-, and carboxyl-C content.

107 D. desulfuricans ND132 cells with increasing DOM concentration.

108 ial Hg methylation increased with increasing DOM sulfurization, likely reflecting either effective in

109 residue formation increases with increasing DOM/CBZ ratios.

110 d more aromatic when compared to the initial DOM.

111 Sulfur is incorporated into DOM predominantly as highly reduced species in sulfidic

112 We quantitatively investigated DOM transformations via elemental analysis and molecular

113 We also isolated DOM from wetlands in the Prairie Pothole Region (PPR) us

114 gs will be useful for reproducibly isolating DOM with representative molecular compositions from vari

115 tly, the quenched fluorescence of humic-like DOM (static and/or dynamic quenching) by nonhumic-like D

116 c and/or dynamic quenching) by nonhumic-like DOM-previously demonstrated for probe molecules but firs

117 erent in solutions containing poultry litter DOM compared to solutions with SRN, indicating that the

118 odel may be suitable to study poultry litter DOM from individual sources.

119 Permafrost and organic mat DOM had similar lability to photomineralization despite

120 These updated numbers match DOM molecular weights measured by colligative methods an

121 Sites of dissolved organic matter (DOM) accumulation could promote the mixotrophic nutritio

122 Natural dissolved organic matter (DOM) affects mercury (Hg) redox reactions and anaerobic

123 of natural aquatic dissolved organic matter (DOM) and compared this technique to the more established

124 ining component of dissolved organic matter (DOM) and in aquatic ecosystems is part of the biological

125 ics of terrestrial dissolved organic matter (DOM) and increase specific disinfection byproduct format

126 scading effects on dissolved organic matter (DOM) and microbial communities in the surface ocean.

127 ly, the effects of dissolved organic matter (DOM) and sediment on SPM-MWCNTs under various conditions

128 systems containing dissolved organic matter (DOM) and sulfide is necessary to predict the conversion

129 gen (N)-containing dissolved organic matter (DOM) as a nutrient source supporting eutrophication in N

130 negatively charged dissolved organic matter (DOM) as coadsorbate remains poorly studied and understoo

131 important role in dissolved organic matter (DOM) biogeochemistry, but its relationship with the fluo

132 in the presence of dissolved organic matter (DOM) by Fourier transform ion cyclotron resonance mass s

133 repared Hg(II) and dissolved organic matter (DOM) complex, Hg(0), and HgS nanoparticles) was measured

134 olecular weight of dissolved organic matter (DOM) determined by high pressure size exclusion chromato

135 samples containing dissolved organic matter (DOM) extracts and bromide were treated under various dis

136 restrially derived dissolved organic matter (DOM) from land to surface waters.

137 systems scavenges dissolved organic matter (DOM) from solution.

138 lutions containing dissolved organic matter (DOM) from three poultry litter extracts was modeled to i

139 ical properties of dissolved organic matter (DOM) have been of interest to scientists and engineers s

140 The quality of dissolved organic matter (DOM) in a wet weather overflow (WWF) can be broadly infl

141 t role in altering dissolved organic matter (DOM) in estuarine and coastal sediments, although its ro

142 transformations of dissolved organic matter (DOM) in five major Arctic rivers (Kolyma, Lena, Yenisei,

143 Dissolved organic matter (DOM) in the oceans is one of the largest pools of reduce

144 transformations of dissolved organic matter (DOM) in the water column.

145 ctural dynamics of dissolved organic matter (DOM) is of paramount importance for understanding DOM st

146 hlorination of six dissolved organic matter (DOM) isolates was investigated.

147 ved guidelines for dissolved organic matter (DOM) isolation by solid phase extraction (SPE) with a st

148 cal composition of dissolved organic matter (DOM) leached from the sand patties under dark and irradi

149 dfires can elevate dissolved organic matter (DOM) levels due to ash input and algal growth in source

150 Dissolved organic matter (DOM) negatively impacts granular activated carbon (GAC)

151 enolic moieties in dissolved organic matter (DOM) play important roles as antioxidants in oxidation p

152 Dissolved organic matter (DOM) quantity and composition control the rate of format

153 Dissolved organic matter (DOM) strongly influences the properties and fate of engi

154 lutions containing dissolved organic matter (DOM) than in ultrapure water, illustrating the importanc

155 cal degradation of dissolved organic matter (DOM) to carbon dioxide (CO2) and partially oxidized comp

156 ing the release of dissolved organic matter (DOM) to inland and coastal waters through increases in p

157 n iron and dissolved natural organic matter (DOM) were not substantially influenced by the mixing ene

158 Reactions of dissolved organic matter (DOM) with aqueous sulfide (termed sulfurization) in anox

159 lar composition of dissolved organic matter (DOM) within these lakes using Fourier transform-ion cycl

160 ation of sulfur in dissolved organic matter (DOM), which influences the reactivity of DOM with trace

161 fficient information on dead organic matter (DOM).

162 ion of fluorescent dissolved organic matter (DOM).

163 charge of reactive dissolved organic matter (DOM).

164 tant repository of dissolved organic matter (DOM).

165 and nonhumic-like dissolved organic matter (DOM).

166 cal composition of dissolved organic matter (DOM).

167 ((*)OH) present in dissolved organic matter (DOM).

168 The dual oscillator model (DOM) implicates glycolysis as the source of oscillatory

169 Competition in MS2-DOM coadsorbate systems were accurately described by a r

170 range of sulfide concentration (1-100 muM), DOM aromaticity (specific ultraviolet absorbance (SUVA25

171 Here we estimate that the national DOM carbon stock in the period of 2004-2008 is 925 +/- 5

172 spectrum of the FIA system to dilute natural DOM samples was illustrated by analyzing water samples c

173 cularly fingerprinting the source of natural DOM could be satisfactorily carried out with Orbitrap ma

174 and the formation of singlet oxygen ((1)O2), DOM triplet excited states ((3)DOM*), and the hydroxyl r

175 odecarboxylation could account for 40-90% of DOM photomineralized to CO2.

176 We discuss the ecological advantages of DOM use by Trichodesmium as an alternative to autotrophi

177 c contaminants and is related to an array of DOM structural characteristics, notably molecular weight

178 observed, which competes with bromination of DOM (i.e., THM and HAA formation).

179 igh resolution molecular characterization of DOM and its relation to groundwater geochemistry across

180 oils will change the chemical composition of DOM exported to arctic surface waters, but the molecular

181 ites and depths, the total sulfur content of DOM correlated with the relative abundance of highly red

182 and patties undergo a gradual dissolution of DOM in both the dark and in the light, but photooxidatio

183 we investigated and compared the effects of DOM on Hg methylation by an iron-reducing bacterium Geob

184 These strain-dependent opposing effects of DOM were also observed with glutathione, suggesting that

185 ls or the endogenous (38 muM +/- 4) forms of DOM.

186 elationship with the fluorescent fraction of DOM (FDOM) remains poorly resolved.

187 in the hydrophobic organic acid fraction of DOM from unimpacted and sulfate-impacted Everglades wetl

188 uorescence parameters captured the impact of DOM size on the fouling of 2-methylisoborneol and warfar

189 the biogeochemical and ecological impacts of DOM export to downstream environments.

190 lts are a demonstration of the importance of DOM sulfurization to trace metal and metalloid (especial

191 sting that FI might be a better indicator of DOM size than aromaticity.

192 cies production demonstrate the influence of DOM composition on photochemistry.

193 The influence of DOM intermolecular interactions on adsorption were minim

194 e an established method for the isolation of DOM from natural waters, because of its ease of applicat

195 consistent with intramolecular oxidation of DOM moieties by (3)DOM*.

196 Partitioning of DOM between the two populations is strongly dependent on

197 target-adsorbate removal in the presence of DOM is investigated, which depends on the competing adso

198 d cells either in the absence or presence of DOM or glutathione, both of which form strong complexes

199 appearance cycling of IPU in the presence of DOM proxies (aromatic ketones and reference fulvic acids

200 depends on temperature, pH, the presence of DOM, and inorganic ions.

201 mical reduction on the optical properties of DOM (absorbance and fluorescence) and the formation of s

202 rved optical and photochemical properties of DOM are a result of multiple populations of chromophores

203 s of great importance that the properties of DOM used in experiments with PM, in particular the molec

204 t reviews have called to expand the range of DOM and ENPs studied.

205 er (DOM), which influences the reactivity of DOM with trace metals.

206 may thus offer new insights into the role of DOM in methylmercury production in the environment.

207 The role of DOM sulfurization in enhancing Hg bioavailability for mi

208 iably indicate the average molecular size of DOM.

209 Using a diverse suite of DOM samples, we found that susceptibility to additional

210 as an inorganic modulator for the supply of DOM from groundwaters to the sea, and that the STE has t

211 dge gap, we quantified the susceptibility of DOM draining the shallow organic mat and the deeper perm

212 The type of DOM (3.06 </= SUVA254 </= 4.85) is not affecting this pr

213 , and a general mechanistic understanding of DOM-PM interactions is still missing.

214 urface waters, but the molecular controls on DOM photodegradation remain poorly understood, making it

215 dicated that photoreactivity is dependent on DOM elemental composition as DOS molecular formulas were

216 ciated with different compounds depending on DOM source.

217 fy sulfate input as a primary determinant on DOM sulfur chemistry to be considered in the context of

218 ses may have direct and cascading effects on DOM composition and microbial community dynamics in the

219 work analysis of 951 experimental results on DOM-PM interactions, which enabled us to analyze and qua

220 to predict how inputs of thawing permafrost DOM may alter its photodegradation.

221 es into the effect of particle coating on PM-DOM interactions.

222 PPR DOM also showed lower SUVA280 at similar weights compare

223 which we attribute to oxidized sulfur in PPR DOM that would increase molecular weight without affecti

224 planktonic carbon fixation, DOM production, DOM composition and microbial community structure respon

225 e mass spectrometry (FT-ICR MS) and quantify DOM photochemical activity using probe compounds.

226 Only in the presence of slow reacting DOM (from treated Colorado River water, i.e., CRW-BF-HPO

227 his process, as long as the bromine-reactive DOM sites are in excess and a sufficient chlorine exposu

228 h heat flow areas, the expulsion of reactive DOM is spotty at any given time.

229 nt bacteria that ultimately transfer reduced DOM compounds to their host trichomes.

230 stics and bacterial metabolism in regulating DOM composition, reactivity and carbon fluxes in Arctic

231 In order to relate DOM molecular weight, optical properties, and reactive s

232 rations (NO2/3, NH4, PO4) in each respective DOM addition.

233 Microbially reworked DOM exhibits an increase in the number and magnitude of

234 Additions included N-rich DOM sources characteristic of urban and agricultural dev

235 nt facility effluent, and concentrated river DOM (used as a reference).

236 rkey litter leachate, and concentrated river DOM did not stimulate phytoplankton growth greater than

237 ing fractions of 32 groundwater and seawater DOM samples along a salinity gradient from a shallow STE

238 of a small pool of oxidants in the selected DOM isolates and whole water samples that is capable of

239 tion resins, suggesting they capture similar DOM moieties.

240 y to elucidate molecular changes in snowpack DOM by in situ microbial processes (up to 55 days) in a

241 r a rapid characterisation of water and soil DOM.

242 Stormflow DOM reflects variability in DOM quantity and composition

243 dsorbability, potentially because stormwater DOM is better suited to compete for aromatic-compound-ad

244 lds and the competitive effect of stormwater DOM and possibly deionized water DOM.

245 In all systems studied, DOM competitively suppressed the adsorption of the virus

246 In this study, DOM excitation-emission matrix (EEM) fluorescence of eig

247 lation efficiencies with the most sulfurized DOM samples were similar (>85% of total Hg methylated) t

248 Refined measurements of supraglacial DOM and their cycling by microbes is critical for improv

249 improving our understanding of supraglacial DOM cycling and the biogeochemical and ecological impact

250 organic matter (SRN) was used as a surrogate DOM standard.

251 trogen-containing compounds in Synechococcus DOM, which may originate from degradation products of th

252 TA-DOM optical characteristics and SDBP-FP were quantified

253 biodegradable dissolved organic carbon in TA-DOM decreases as fire intensity (i.e., temperature) incr

254 fter the inoculation with P. subcapitata, TA-DOM aromaticity (indicated by SUVA254) increased from 1.

255 results supported the view that terrestrial DOM consist of a hydrophobic rigid core surrounded by pr

256 systems, UV-induced oxidation of terrigenous DOM (tDOM) produces atmospheric CO2 and this process is

257 tain may be capable of retaining terrigenous DOM fractions in marine sediments.

258 These observations indicate that DOM effects on Hg methylation are bacterial strain speci

259 ulfidic conditions, whereas others show that DOM inhibits Hg methylation due to strong Hg-DOM complex

260 Several studies have shown that DOM can enhance Hg methylation, especially under sulfidi

261 This study shows that DOM quality is a crucial parameter for prediction of Hg

262 This signified that DOM removal by coagulation can be achieved at lower mixi

263 These results suggest that DOM could be directly taken up by Trichodesmium or prima

264 ate concentrations potentially suggests that DOM in the deionized water induce a competitive effect t

265 The DOM source and composition was characterized using absor

266 14.7 +/- 0.5 kDa was also resolved from the DOM-associated fraction.

267 The changes in the DOM quality and quantity were consistent with biodegrada

268 In this report, we modify the DOM by incorporating an established link between metabol

269 re, our work focuses on the diversity of the DOM and PM types investigated.

270 At the heart of the DOM cycle lie molecular-level relationships between the

271 The diversity of the DOM-PM combinations studied has mostly been decreasing o

272 and peptides indicate high reactivity of the DOM.

273 and decreased with increasing SUVA254 of the DOM.

274 the paved runoff and sanitary sewage on the DOM quality of WWF using excitation-emission matrix para

275 are bacterial strain specific, depend on the DOM:Hg ratio or site-specific conditions, and may thus o

276 Indications were found that thiol-DOM ratios in groundwater are likely to be lower than in

277 lower SUVA280 at similar weights compared to DOM isolates from a global range of environments, which

278 an almost complete bromine incorporation to DOM (>/=87%).

279 Application of these probes to DOM isolates and whole natural waters afforded intermedi

280 /algal DOM content and negatively related to DOM molecular weight, DOM aromaticity, and the content o

281 ts (muM sulfide concentrations and low Hg-to-DOM molar ratios).

282 ther electrophilic substitution of unaltered DOM sites and chlorinated DOM moieties.

283 is of paramount importance for understanding DOM stability and role in the fate of solubilized organi

284 stormwater DOM and possibly deionized water DOM.

285 ials, such as DOM isolated from fresh water, DOM in whole-water samples, and TiO2 and silver PM.

286 negatively related to DOM molecular weight, DOM aromaticity, and the content of polyphenols.

287 ue insight into the mechanisms through which DOM source and environmental processing determine compos

288 ure that can mediate reactivity of the whole DOM.

289 residue formation of polar contaminants with DOM in the aqueous phase is thus a disregarded pathway a

290 lized optical properties also correlate with DOM composition, the ability of FT-ICR MS to characteriz

291 al migration to groundwater, especially with DOM in the influent solution.

292 This suggests that complexes of Hg(II) with DOM thiols have similar bioavailability to Hg(II) comple

293 ing of CBZ phototransformation products with DOM molecules.

294 re formed via covalent binding of 3-QCA with DOM molecules of above-average O/C and H/C ratios.

295 f the bromine (HOBr) was found to react with DOM via electrophilic substitution (</=40%), forming AOB

296 ng AOBr, and the remaining HOBr reacted with DOM via electron transfer with a reduction of HOBr to br

297 stants for reaction of reactive species with DOM.

298 endent of DOC concentration, but varied with DOM source: developed land cover (4-6%) approximately op

299 ainfall (low ionic strength solution without DOM) and landfill leachate (high DOM content and high io

300 nfluence on the quality and yield of the WWF DOM.