ライフサイエンスコーパス: selenate

1 nine) in addition to some selenocysteine and selenate.

2 atile Se compounds when they were exposed to selenate.

3 erexpressors, both on media with and without selenate.

4 robably by an inability to chemically reduce selenate.

5 plants supplied with selenite compared with selenate.

6 whereas selenate-supplied plants accumulated selenate.

7 e from T. selenatis grown anaerobically with selenate.

8 cystine, methaneseleninic acid, selenite and selenate.

9 th myrosinase activity below 3.5-mmol sodium selenate.

10 ata) exposed to either 20 microM selenite or selenate.

11 ironmentally relevant mineral reductants for selenate.

12 o environmentally relevant concentrations of selenate.

13 y (88-95%) organic C-Se-C; the remainder was selenate.

14 the grain more efficiently than selenite and selenate.

15 Selenate-(18)O enrichment (epsilonO) was nearly identica

16 o or supranutritional amounts of selenium as selenate (200 or 400 mug/d) or as selenomethionine (200

17 orms was higher for selenite (100%) than for selenate (26%), the absolute concentration of organosele

18 than that measured from plants supplied with selenate, 38 times higher than from selenite, and six ti

19 The mutants are resistant to selenate, a toxic analogue of sulfate.

20 (-1)DM) and the concentration (2-mmol sodium selenate) above which the content of phenolic compounds

21 cation of Se reduction and assimilation from selenate accumulated in the cladode tips into the two LC

22 teria had dramatically enhanced tolerance to selenate and a reduced level of Se accumulation.

23 ontent was lower in plants supplemented with selenate and accumulated mainly in the leaves compared w

24 ysis showed that cladode tips contained both selenate and C-Se-C forms.

25 ke step caused by diffusive exchange between selenate and chloride followed by a slower, high-fractio

26 h) assays, using different concentrations of selenate and competitor sulfate.

27 in mixed-type inhibition, in the presence of selenate and potassium thiocyanate.

28 Herein, the mechanism of selenate and selenite adsorption on NU-1000 is explored

29 ested for their ability to adsorb and remove selenate and selenite anions from aqueous solutions.

30 ung leaf itself, there was 30% inorganic Se (selenate and selenite) in addition to 70% MeSeCys.

31 products, two foliar Se fertilisers (sodium selenate and selenite) were tested at four rates (0-10-2

32 capacity, and fastest uptake rates for both selenate and selenite, of all zirconium-based MOFs studi

33 e 53 nM (4.2 ppb Se) and 380 nM (30 ppb) for selenate and selenite, respectively.

34 ate-limiting steps in Se volatilization from selenate and selenite, time- and concentration-dependent

35 ed in high mortality to embryos/larvae while selenate and SeNPs were nontoxic.

36 from the elements, DeltaH(f,el), for Al(13) selenate and sulfate are -19,656.35 ( +/- 67.30) kJ.mol(

37 degrees C in 5 N HCl for the epsilon-Al(13) selenate and sulfate are -924.57 (+/- 3.83) and -944.30

38 affinity of the epsilon-Keggin clusters for selenate and sulfate, the enthalpy associated with two S

39 slow rate of oxygen isotope exchange between selenate and water under most environmental conditions d

40 The rate of oxygen isotope exchange between selenate and water was investigated at conditions of 10

41 sures, we examined the toxicity of selenite, selenate, and amorphous selenium nanoparticles (SeNPs).

42 rtant implications for the fate of chromate, selenate, and sulfate in subsurface environments and off

43 rized the adsorption mechanisms of chromate, selenate, and sulfate on Al-substituted ferrihydrite (0,

44 ctron acceptors such as antimonite, nitrate, selenate, and sulfate.

45 For both selenate- and selenite-supplied plants, Se accumulation

46 selectivity for the tetrahedral sulfate and selenate anions observed in competitive crystallization

47 With either selenite or selenate as substrates, Se methylation was highly effici

48 btain energy by respiring anaerobically with selenate as the terminal electron acceptor.

49 e to dimethyl selenide (DMSe): (a) uptake of selenate, (b) activation of selenate by ATP sulfurylase,

50 4 mm or more behind the apex when exposed to selenate but in the meristem (approximately 1 mm from th

51 nificantly up-regulated in plants exposed to selenate but were low in plants supplied with selenite.

52 ): (a) uptake of selenate, (b) activation of selenate by ATP sulfurylase, and (b) conversion of selen

53 experiments were performed with selenite or selenate by equilibrating suspensions containing the nan

54 A new organic-soluble selenate, [(C6H5)4P]3(O3SeOCH2OSeO3)(HSeO4), was synthes

55 As a result, selenate can be quantified in the presence of up to 1.5

56 m jarosite, TlFe3(OH)6(SO4)2, along with the selenate-capped jarosite analogues of potassium, KFe3(OH

57 Molybdate, selenate, chromate ("chromium VI"), arsenate, tungstate,

58 Selenate, chromate, and arsenate produce transient APX i

59 es in selenium speciation, with selenite and selenate co-occurring in most samples.

60 lubility product very similar to that of the selenate complex.

61 elenomethionine, sodium selenite, and sodium selenate) compounds.

62 s soil, or on gravel supplied with different selenate concentrations.

63 In addition, DeltaH(f,el) for sodium selenate decahydrate was calculated using data from high

64 t environmental conditions demonstrates that selenate-delta(18)O signatures produced by biogeochemica

65 that it will be possible to use the value of selenate-delta(18)O to investigate the biogeochemical be

66 and seleno-methionine exert this effect but selenate does not.

67 lated around ten times more efficiently than selenate due to different membrane transporters.

68 the kinetic isotope effects for (18)O within selenate during abiotic reactions with iron-bearing hydr

69 The sulfate:arsenate and sulfate:selenate exchange ratios were 1:2 and 1:1, respectively.

70 Plants exposed to 5 microM selenate for 28 days contained predominantly selenate in

71 and for selenate on schwertmannite, whereas selenate forms outer-sphere complexes in the aluminum oc

72 rpose of this study was to determine whether selenate fortification of infant formula would improve t

73 Selenate fortification of infant formulas can improve th

74 (n = 7, mean body weight = 1312 g) received selenate-fortified preterm and full-term infant formulas

75 lenium (Se), occurring as oxidized inorganic selenate from hypersalinized agricultural drainage water

76 Cv removed 96% of Se (supplied as selenate) from the microcosm water column within 72 h, w

77 hwertmannite and 3 times higher than that of selenate in both phases.

78 Inorganic selenate in drainage water was metabolized differently i

79 Thereby, the biotransformation of selenate in pakchoi was similar to other Brassicaceae pl

80 selenate for 28 days contained predominantly selenate in the mature leaf tissue at a concentration of

81 o investigate the biogeochemical behavior of selenate, in an analogous fashion to the use of sulfate-

82 and subsequent oxidation/elimination of the selenated intermediate 14 with H2O2.

83 ted by supplementing inorganic selenium from selenate into sand.

84 luminite and schwertmannite for arsenate and selenate is compared, and the coordination geometries of

85 indicating that the ability to biotransform selenate is either inducible or developmentally specific

86 Our data suggest that Se volatilization from selenate is limited by the rate of selenate reduction, a

87 Root transcriptome changes in response to selenate mimicked the effects observed under sulfur star

88 num centered epsilon-Keggin clusters, Al(13) selenate, (Na(AlO(4))Al(12)(OH)(24)(SeO(4))(4)*12H(2)O)

89 The enzyme is specific for the reduction of selenate; nitrate, nitrite, chlorate, and sulfate were n

90 f ligand for arsenate on both phases and for selenate on schwertmannite, whereas selenate forms outer

91 When grown in the presence of selenate or selenite, these bacteria produced both organ

92 own in hydroponic solution supplemented with selenate or selenite.

93 um compared with plants supplied with SeMet, selenate, or selenite; they also accumulated more Se in

94 onally have evolved enhanced specificity for selenate over sulfate.

95 (approximately 5 microM), sulfate, chromate, selenate, phosphate, and chlorate did not bind even when

96 d classes of oxo compounds (i.e., vanadates, selenate, phosphate, sulfate, acetate, nitrate, and nitr

97 methylseleno-Cys concentration is lower, and selenate predominates.

98 Specifically, uptake of selenate (probably by sulfate transporters) occurred at

99 after the initial uptake step, the extent of selenate reaction is well correlated with delta(18)O val

100 er culture death, with 1.3-6.1% of the added selenate recovered as organic metabolites.

101 e replicated in the laboratory via anaerobic selenate-reducing enrichment cultures.

102 The selenate reductase contains molybdenum, iron, and acid-l

103 n, and pH optimization of the membrane-bound selenate reductase from E. cloacae SLD1a-1.

104 Results show that the membrane-bound selenate reductase has optimum activity at pH approximat

105 elenium methyltransferases and a respiratory selenate reductase have also been described.

106 The membrane-bound selenate reductase of Enterobacter cloacae SLD1a-1 is pu

107 eta-subunits of microbial nitrate reductase, selenate reductase, dimethyl sulfide dehydrogenase, ethy

108 on of selenate to selenite is catalyzed by a selenate reductase, previously shown to be located in th

109 tudies constitute the first description of a selenate reductase, which represents a new class of enzy

110 These results also indicate that sulfate and selenate reduction are developmentally correlated, and t

111 TPS and APR had a significant enhancement of selenate reduction as a proportion of total Se, whereas

112 that ATPS and APR are major contributors of selenate reduction in planta.

113 ession resulted in only a slight increase in selenate reduction to organic forms.

114 ntribute to Se isotope forensics to identify selenate reduction within field sites and to possibly di

115 APR2 is a key enzyme in both sulfate and selenate reduction, and its reduced activity in the loss

116 tion from selenate is limited by the rate of selenate reduction, as well as by the availability of Se

117 h other and to the previously isolated sel1 (selenate-resistant) mutants, and have been designated se

118 could be mediated by Fe(II)-rich minerals or selenate-respiring microorganisms.

119 In the presence of selenate (Se((VI))), the precipitates formed remained sm

120 Our results show that selenate (Se(VI)) is the dominant Se species in Rosita g

121 nt selenium oxyanions, selenite (Se(IV)) and selenate (Se(VI)), can be quantified down to 7.3 and 8.3

122 e, were optimised for five selenium species; selenate (Se(VI)), Selenite (se(IV)), selenocysteine (Se

123 rexpressors and wild type accumulated mostly selenate (Se(VI)).

124 ith selenocompounds (sodium selenite, sodium selenate, Se-Met, MeSeCys) or SeB [high-Se (H-SeB) or lo

125 amino acids" and related oxidation products, selenate, selenite, and other species relatable to the q

126 ous inorganic or organic species of Se (e.g. selenate, selenite, and Se-methionine [Met]) into gaseou

127 ession and SeMSC accumulation in response to selenate, selenite, and sulfate treatments showed that t

128 edium and amended with the selenium oxyanion selenate, selenite, or selenocyanate, produces volatile

129 d several SRM selective inhibitors including selenate, selenite, tellurate, tellurite, nitrate, nitri

130 Besides selenite and selenate, selenosulfate was the most frequently occurrin

131 Selenate (SeO(4)(2-)) reduction to elemental selenium is

132 n selenium oxoanions selenite (SeO3(2-)) and selenate (SeO4(2-)) are toxic at intake levels slightly

133 onsumers of dissolved selenite (SeO3) versus selenate (SeO4) uptake into aquatic primary producer com

134 Selenate speciation (HSeO(4)(-) vs SeO(4)(2-)) also has

135 e- or SeMet-supplied wild-type plants and in selenate-supplied ATP-sulfurylase transgenic plants.

136 ic Se, most likely selenomethionine, whereas selenate-supplied plants accumulated selenate.

137 increased Se accumulation, whereas increased selenate supply increased sulfate accumulation in both r

138 nions examined were selenocyanate, selenite, selenate, tellurite, and tellurate.

139 activity was increased more by both doses of selenate than by the placebo in C-P class B patients.

140 selenium was increased more by 400 mug Se as selenate than by the placebo in C-P class C patients.

141 gation in these mutants is less sensitive to selenate than in wild-type plants.

142 Within the groups who responded to selenate, there was a considerable variation in response

143 s for the assimilation and volatilization of selenate to dimethyl selenide (DMSe): (a) uptake of sele

144 The reduction of selenate to selenite is catalyzed by a selenate reductas

145 able to reduce selenite aerobically, but not selenate, to nano-Se.

146 CpNifS overexpression significantly enhanced selenate tolerance (1.9-fold) and Se accumulation (2.2-f

147 The present study showed that shoots of selenate-treated plants accumulated very low concentrati

148 of organoselenium (e.g. selenomethionine) in selenate-treated roots.

149 was actually approximately 5-fold higher for selenate-treated roots.

150 Root growth was adversely affected by selenate treatment in both ATPS and SAT overexpressors a

151 trations approximately 18-fold higher in the selenate treatment.

152 Both selenite and selenate, two major inorganic forms of Se, are readily i

153 nvolve constitutive up-regulation of sulfate/selenate uptake and assimilation, associated with elevat

154 , 5 mM, 3 d) were also tested for effects on selenate uptake and sulfate transporters' expression.

155 In S. pinnata, selenate uptake and translocation rates are constitutive

156 ed by 100-fold excess sulfate, which reduced selenate uptake by 100% in S. elata and 40% in B. juncea

157 entrations, apparently due to suppression of selenate uptake by sulfate, and insufficient nitrogen co

158 ccumulators S. elata and Brassica juncea for selenate uptake in long- (9 d) and short-term (1 h) assa

159 The selenate uptake rate for S. pinnata (1 h) was three- to

160 Sulfate and selenate uptake were investigated in both selenium (Se)

161 addition, high levels of sulfate suppressed selenate uptake, resulting in a dramatic reduction of Bo

162 sorption capacity but had a strong impact on selenate uptake, suggesting some kind of specific intera

163 expression and interactions with sulfate and selenate uptake.

164 doubt by the high peak at its position in a selenate versus sulfate difference Fourier.

165 ulfur, plants readily take up and assimilate selenate via sulfur transporters and enzymes and can eve

166 Based upon bulk solution concentrations, selenate was 9-fold more toxic to the roots than selenit

167 The Km for selenate was determined to be 16 microM, and the Vmax wa

168 Selenate was found to be stable throughout the entire di

169 Selenate was metabolized less than selenite in whole pla

170 n and Se dose for both fertilisers, although selenate was much more efficient.

171 Selenate was rapidly translocated to the shoot, away fro

172 Selenate was reduced to Se(0) by a green rust (chloride

173 Selenate was successfully bioremediated by microalgal me

174 Time-dependent kinetic studies showed that selenate was taken up 2-fold faster than selenite.

175 Laboratory algal cultures exposed to selenate were shown to produce and release selenomethion

176 It should be stressed that amounts of selenate were smaller than expected.

177 and inorganic selenium species (selenite and selenate) were not detected in the dialyzate.

178 accumulated relatively more C-Se-C and less selenate when growing adjacent to S. pinnata.

179 ulfate was the main mechanism for removal of selenate, whereas arsenate was removed by a combination

180 esPR plants showed directional growth toward selenate, while CP roots did not.

181 6-fold more Se and was tolerant to 20 microm selenate, while S. albescens suffered reduced growth, ch

182 Simultaneous treatment of selenate with selenite significantly reduced SeMSC produ