ライフサイエンスコーパス: humic acid

1 ther anions, especially organic acids (e.g., humic acids).

2 of a real HS sample, the standard Leonardite humic acid.

3 emain the same in the presence or absence of humic acid.

4 cal reduction of IO(3)(-) in the presence of humic acid.

5 ing 100 ng/mL of p,p'-DDE with 0 or 100 mg/L humic acid.

6 by Ag(0) formation rather than by binding to humic acid.

7 ratio were similar to that in the absence of humic acid.

8 even in the presence of up to 5 ppm of added humic acid.

9 onic species to low proton-affinity sites in humic acid.

10 e shoot growth-promoting action of the model humic acid.

11 rt from the aerosols from the two sources of humic acid.

12 t hydraulic conductivity caused by the model humic acid.

13 by coating silica particles with commercial humic acid.

14 edia of quartz sand, even in the presence of humic acid.

15 l radical, as well as indigenous radicals of humic acids.

16 binding sites on larger, less bioaccessible humic acids.

17 ere conducted in the presence and absence of humic acids.

18 crobial reduction of iron(III) compounds and humic acids.

19 the diverse types of molecules contained in humic acids.

20 eshwater and coastal seawater are fulvic and humic acids.

21 terial than with Nordic NOM and Pahokee peat humic acids.

22 The experimental chamber contained water, humic acid (1-10 mg L(-1)) as a proxy for dissolved orga

23 -1) (mgC = mg carbon); k (hydroxyl radical + humic acids) = 1.4 x 10(4) L mgC(-1) s(-1)).

24 simulated by filtering aqueous solutions of humic acid (5 and 20 mg L(-1)), a suspension of Escheric

25 rates with humic acids (k (sulfate radical + humic acids) = 6.8 x 10(3) L mgC(-1) s(-1) (mgC = mg car

26 performance of the polymer is unaffected by humic acid, a component of natural organic matter that f

27 , despite increased colloidal stability when humic acid adsorbed to AgNPs, the presence of humic acid

28 We developed a new humic acid adsorption method for determining the relativ

29 For humic acid aerosols, uptake coefficients in the range of

30 udies and differing from sorption to Aldrich-humic acid (AHA) utilized as reference sorbent.

31 The addition of electron acceptors (e.g., humic acid) also led to substantially increased Hg(0)aq

32 The humic acid analog anthraquinone-2,6-disulfonate (AQDS) i

33 nd to another unusual electron acceptor, the humic acid analog anthraquinone-2,6-disulfonate.

34 NTA, Fe(III) citrate, as well as to AQDS, a humic acid analogue.

35 tion, suggesting a "blocking effect" between humic acid and bacterial cells.

36 In addition, both humic acid and FBS protein effectively lowered the amoun

37 Humic acid and FBS significantly changed the characteris

38 This research examined the effects of humic acid and fetal bovine serum (FBS), which are ubiqu

39 esence of the two model NOMs (Suwannee river humic acid and fulvic acid).

40 A water soluble humic acid and melanin-like polymer complex (OMWW-ASP) w

41 ass transition (T(g)) behavior in Leonardite humic acid and Organosolv lignin enabled evaluation of e

42 c molecules found in natural waters; namely, humic acid and rhamnolipid.

43 h both low and high proton-affinity sites of humic acid and zwitterion interaction with high proton-a

44 including commercially available fulvic and humic acids and an authentic Arctic snow DOM sample isol

45 isporus serine proteinase SPR1 is induced by humic acids and is highly expressed during growth on com

46 s similar to the behavior observed for model humic acids and several surface waters, suggesting that

47 tles (confirmed by replacing the sludge with humic acids), and (iii) Geobacter sulfurreducens to prod

48 sis for a specific whole soil and its humin, humic acid, and fulvic acid fractions, as well as a samp

49 free from interference caused by carbonate, humic acids, and fluoride.

50 Elevated lead in the presence of humic acid appeared to be driven by complexation, with (

51 sent in spectra of Suwannee River fulvic and humic acid are singly charged, thus eliminating inadequa

52 These iodinated humic acids are stable with respect to photolysis at nea

53 coli as a model organism and Suwannee River Humic Acid as a representative NOM.

54 e in pH enhanced the formation of AgNPs, and humic acids as ligands showed higher formation of AgNPs

55 n, lactoferrin, serum IgG, soil extracts and humic acid, as well as high concentrations of intercalat

56 The value of logK (ratio of absorbance of humic acids at 400 and 600 nm) was cedar > transition zo

57 1000 +/- 3000 ppb) ions were measured in the humic acid atomizer solutions compared to the other orga

58 Thus, in the presence of humic acids, atrazine is degraded more efficiently by su

59 of site masking in the ternary clay mineral-humic acid-bacteria composite.

60 rs of highly divergent composition including humic acid, bone dust, coprolite, peat extract, clay-ric

61 bited in the presence of radical scavengers (humic acid, carbonate), in complex aquatic matrices (Iow

62 We observed that humic acid caused a similar level of inhibition in both

63 Easily separable humic acid coated magnetite (HA-Fe3O4) nanoparticles are

64 ll humic substances (fulvic acid and aquatic humic acid, collectively denoted as "fulvic-like substan

65 However, as the humic acid concentration was increased, the maximum aggr

66 ts, with mobility decreasing with decreasing humic acid concentration.

67 H selection in various model compounds and a humic acid confirms the robust nature and good sensitivi

68 yaniline was studied in reactions with model humic acid constituents (quinones and other carbonyl com

69 increase in silver uptake in the presence of humic acid did not result in decreased algal growth.

70 c carbon and water (KOC) and between Aldrich humic acid dissolved organic carbon and water (KDOC) for

71 nions (PO(4)(3-), CO(3)(2-), SiO(4)(4-), and humic acid) does not inhibit electron transfer between a

72 samples was compared to dissolved commercial humic acids (DOM).

73 Sulfide and humic acid each individually caused immediate increases

74 he least to most inhibitive was Pahokee Peat humic acid, Elliot Soil humic acid, Suwannee River humic

75 lead as insoluble hydroxypyromorphite, while humic acid enhanced lead mobility.

76 ic acids) from Suwannee River, GA, and (2) a humic acid extract from a degraded wood collected on Mt.

77 with Elliott humic and fulvic acids and with humic acids extracted from natural carbonaceous material

78 characterization of complex mixtures such as humic acid extracts has been elusive because of insuffic

79 riacetic (NTA) and Suwannee River fulvic and humic acids (FA and HA) in solution at pH 7 was investig

80 monomethyl amine sulfate, and two sources of humic acid, for an initial HO2 concentration of 1 x 10(9

81 eonardite humic acid (LAHA) and Florida peat humic acid (FPHA), at concentrations above 5 mg C/L, sho

82 rogen directly bonded to aromatic rings in a humic acid fraction extracted from a continually submerg

83 5% of all carbon), whereas the corresponding humic acid fraction extracted from an aerobic, single-cr

84 through the reduction of Ag(+) by fulvic and humic acid fractions of natural organic matter in the en

85 The mass spectra of the humic acid fractions were also markedly different from t

86 Humic acids from three different terrestrial sources (so

87 e of low levels (1-6 mg/L) of Suwannee River humic acid, fulvic acid, alginate, citric acid, and carb

88 Stability study of AgNPs, formed in Ag(+)-humic acid/fulvic acids-Fe(3+) mixtures over a period of

89 It was further observed that humic acids generally react faster than fulvic acids.

90 Insight in the molecular structure of humic acid (HA) and fulvic acid (FA) can contribute to i

91 ar level of understanding on the dynamics of humic acid (HA) and its interaction with uranyl in the p

92 y under anoxic conditions in the presence of humic acid (HA) and two simulated landfill leachates of

93 mpure samples using the common PCR inhibitor humic acid (HA) as a model.

94 experiment using reduced and reoxidized soil humic acid (HA) as reductant and sorbent at copper loadi

95 Thus, we study the effect of humic acid (HA) coprecipitation on Fh reduction and seco

96 The presence of humic acid (HA) did not hinder DCF removal by the compos

97 Humic acid (HA) is thought to promote NO2 conversion to

98 his study, the impact of UVA irradiation and humic acid (HA) on deposition of aqueous fullerene nanop

99 ferrioxamine B (DFOB), fulvic acid (FA), and humic acid (HA) on plutonium (Pu) sorption to goethite w

100 We examined the impact of Suwannee River humic acid (HA) on the toxicity of TiO2NPs to developing

101 cies (ROS) by C60 under UV irradiation, when humic acid (HA) or fulvic acid (FA) is present.

102 uspensions and Ag(+) in solution when adding humic acid (HA) to bacterial suspensions.

103 The addition of humic acid (HA) to the exposure media significantly decr

104 untreated and electrochemically reduced soil humic acid (HA) under oxic and anoxic conditions.

105 ed activated carbon (GAC) in the presence of humic acid (HA) was examined.

106 A lignite humic acid (HA) was separated from inorganic and non-HA

107 bsorbing brown carbon surrogate derived from humic acid (HA) were measured across the visible to near

108 rong change of the molecular conformation of humic acid (HA) with a predominant adsorption in the Ste

109 We reacted 0.2 mol C/L peat and humic acid (HA) with up to 5.8 mM S(-II) at pH 7 and 5,

110 tural dissolved organic matter (DOM) such as humic acid (HA), and this binding is known to affect the

111 The presence of humic acid (HA), as an analog of soil organic matter, do

112 on with reduced and nonreduced Sigma-Aldrich humic acid (HA), at pH 6 under anoxic conditions.

113 Humic acid (HA), further increased their size and polydi

114 45 mV) increased the adsorption of EfOM and humic acid (HA), moderately and sharply, respectively, s

115 ed to Cry1Ab protein adsorption to an apolar humic acid (HA).

116 threne to FA increased after the addition of humic acid (HA).

117 The distinct effects of humic acid (HA, 0-10 mg L(-1)) on the transport of titan

118 Sonication and humic acids (HA) are known to disperse carbon nanotube (

119 ontaining glycine, EDTA, and fulvic (FA) and humic acids (HA) by atomic absorption spectroscopy (AAS)

120 Humic acids (HA) compete with TCs for Fe(II), but the ef

121 ed in the isolation of fulvic acids (FA) and humic acids (HA) have been identified as a possible cont

122 Sunflower root exudates, humic acids (HA), and the synthetic oleophilic fertilize

123 (4, 5.5, and 8) or by introducing 10 mg/L of humic acids (HA).

124 hodes were exposed to high concentrations of humic acids (HA).

125 aracteristics of Cd on montmorillonite(Mont)-humic acid(HA)-bacteria composites.

126 salicylic acid (SA), natural organic matter (humic acid, HA), and dissolved silicates.

127 erface, association of fullerene to pure and humic acid (HA7) coated gammaFe2O3 NPs led to the format

128 Pyrogenic humic acid has been included in our study since it will

129 is study, we compared the abilities of three humic acids (HAs) (obtained through sequential extractio

130 Humic acids (HAs) accept and donate electrons in many bi

131 l SiO(2), ZnO, hydrous ferric oxide (HFO) or humic acids (HAs) as well as heterogeneous suspensions c

132 and absence of agricultural and forest soil humic acids (HAs) at pH 5-8.

133 de (GLY) with soluble fulvic acids (FAs) and humic acids (HAs) at pH 5.2 and 7 were studied by (1)H a

134 indicated that an increase in the amount of humic acids (HAs) increasingly inhibited Al adsorption b

135 Electrochemical oxidation of three model humic acids (HAs) was largely irreversible, and the EDCs

136 The interaction of humic acids (HAs) with 1-palmitoyl-2-oleoyl-Sn-glycero-3

137 of TBBPA bound-residue formation to two soil humic acids (HAs), Elliott soil HA and Steinkreuz soil H

138 Fulvic and humic acids have a large variability in binding to metal

139 A de-ashed humic acid (i.e., metals being removed) scavenged more P

140 y related to the conformational structure of humic acid in solution and its interaction with the cell

141 larithromycin and tetracycline) to dissolved humic acid in the absence and presence of Ca(2+) and eva

142 ternary complex formation or, in the case of humic acid, incorporation into HA aggregates.

143 t to clarithromycin, tetracycline binding to humic acid increased in the presence of Ca(2+), especial

144 at are believed to model some subunit of the humic acid is determined.

145 h advanced spectral editing showed that this humic acid is rich in lignin derivatives (>45% of all ca

146 Structural information on humic acids is difficult to obtain because of the hetero

147 The binding of Pb(II) to humic acids is studied through an approach combining equ

148 er considerably in their reaction rates with humic acids (k (sulfate radical + humic acids) = 6.8 x 1

149 The two terrestrial HAs, namely Leonardite humic acid (LAHA) and Florida peat humic acid (FPHA), at

150 inding of sulfamethazine (SMZ) to Leonardite humic acid (LHA) and to four synthetic humic acids (SHAs

151 iving the adsorption of Cry1Ab to Leonardite humic acid (LHA), used as a model for SOM.

152 ced and electrochemically reduced Leonardite Humic Acid (LHA).

153 ) (microbial byproducts region), and Peak H (humic acid-like region).

154 in root and shoot (fluridone) show that the humic acid-mediated enhancement of both root hydraulic c

155 ological and metabolic mechanisms behind the humic acid-mediated plant growth enhancement are discuss

156 umic acid adsorbed to AgNPs, the presence of humic acid mitigated the toxicity of AgNP suspensions be

157 In the presence of 20 ppm of humic acid of an organic-rich soil, plutonium diffusion

158 The effects of humic acid on lipid accumulation of fullerene depended o

159 a suggest that all of these actions of model humic acid on root functionality, which are linked to it

160 electrochemical reduction of a purified soil humic acid on the binding of two chalcophile metal catio

161 particle surface chemistry (PVP, citrate, or humic acid) on alpha, and found a strong dependence on b

162 f natural organic matter (in forms of either humic acid or Anacostia River sediment porewater) decrea

163 Adsorption of humic acid or rhamnolipid on the Al2O3 surface resulted

164 FeOx associated with humic acids or citrate were less toxic than OM-free FeOx

165 iquitous organic ligands (e.g., -SH (thoil), humic acid, or -COO (carboxylate)) is limited.

166 When peat humic acid (PHA) was added to a NOM-deficient sediment c

167 tained by photosensitization by Pahokee Peat Humic Acid (PPHA) and Suwannee River Fulvic Acid (SRFA),

168 fer from reduced and nonreduced Pahokee Peat humic acids (PPHA) and fresh soil organic matter (SOM) e

169 so markedly different from those of the bulk humic acids previously reported.

170 ively charged tetracycline-Ca complexes with humic acid rather than due to the formation of ternary c

171 Humic acid, regardless of fullerene presence or plant ty

172 humic acid was slightly enhanced compared to humic acid reoxidized by O(2) and quantitatively in exce

173 (13)C-CP/MAS NMR measurements of humic acids revealed an increasing incorporation of phen

174 ying lignin and related metabolites found in humic acid-rich environment.

175 an OM-poor clay soil, a hydrophilic Aldrich humic acid salt, and water-insoluble leonardite.

176 markedly different from that of the original humic acid sample.

177 rdite humic acid (LHA) and to four synthetic humic acids (SHAs) polymerized from low molecular weight

178 hydrocarbons served as model analytes, while humic acid, sodium dodecyl sulfate, hydroxypropyl-beta-c

179 r nanoparticles and nanoparticle spiked into humic acid solution (50 mg/L) at an environmentally rele

180 borohydride-reduced Suwanee River fulvic and humic acids (SRFA and SRHA, respectively).

181 investigated as a function of Suwannee River Humic Acid (SRHA) and background electrolyte concentrati

182 n to stabilize nanoparticles (Suwannee river humic acid (SRHA) and fulvic acid (SRFA)), synthetic add

183 Suwannee River humic acid (SRHA) and Williams Lake hydrophobic acid (WL

184 benzene sulfonate (SDBS), and Suwannee River Humic Acid (SRHA) at pH 5.0-6.0.

185 ) water at pH 5.6 +/- 0.2 and Suwannee River humic acid (SRHA) at pH 5.1 +/- 0.2 using low doses of c

186 ies revealed that the aquatic Suwannee River humic acid (SRHA) causes an increased biomembrane pertur

187 c lake fulvic acid, NLFA) and Suwannee River humic acid (SRHA) followed the order NLFA > SRHA > PPFA

188 Presence of Suwannee River humic acid (SRHA) showed aggregation enhancement for bot

189 Suwanee River Humic Acid (SRHA) was also used to determine the effect

190 Suwannee River humic acid (SRHA) was used to study the effects of natur

191 ell-characterized humic acid (Suwannee River Humic Acid, SRHA).

192 The presence of humic acid stabilized the system against heteroaggregati

193 s containing functional groups identified in humic acid structures indicate that efficient substituti

194 background electrolyte) in Milli-Q water and humic acid suspensions.

195 presence or absence of a well-characterized humic acid (Suwannee River Humic Acid, SRHA).

196 ive was Pahokee Peat humic acid, Elliot Soil humic acid, Suwannee River humic acid, Suwannee River NO

197 acid, Elliot Soil humic acid, Suwannee River humic acid, Suwannee River NOM, Suwannee River fulvic ac

198 in competition, it was the influence of the humic acid that dominated that of the sulfide.

199 The portion of the humic acid that has structure similar to that of the mod

200 In the presence of humic acid, the trends in the variation of the heteroagg

201 In the humic acid, this permits unequivocal assignment of the m

202 uilibrated models of the standard Leonardite humic acid, together with corresponding force-field para

203 The high reactivity of humic acids toward HO(*) is in line with the antioxidant

204 polyacrylamide (PAM) gel in the presence of humic acid using a diffusion cell (D = 1.70 +/- 0.25 x 1

205 The binding of cadmium to reduced humic acid was slightly enhanced compared to humic acid

206 Clarithromycin interaction with dissolved humic acid was well described by the model including the

207 Two aquatic fulvic acids and one soil humic acid were irradiated to examine the resulting chan

208 lecules such as proteins, carbohydrates, and humic acids were excluded.

209 sulfide and natural organic matter (NOM, as humic acid), while under suboxic conditions.

210 caused by a structurally well-characterized humic acid with sedimentary origin is functionally assoc

211 e humidity was also observed for uptake onto humic acid, with larger uptake coefficients seen at high