ライフサイエンスコーパス: thorium

1 be 24.19 mg/mL for Barium and 5.05 mg/mL for Thorium.

2 um over 238-uranium and 238-uranium over 230-thorium.

3 erminal phosphorano-stabilized carbenes with thorium.

4 2 were analyzed for uranium in comparison to thorium.

5 thin the crust by alpha-decay of uranium and thorium.

6 Thorium-227 ((227)Th) is an alpha-emitting radionuclide

7 Thorium-229 nuclei exhibit a uniquely low-energy nuclear

8 ctinium-225 ((225)Ac) can be produced from a Thorium-229/Radium-225 ((229)Th/(225)Ra) generator, from

9 that sedimentary ratios of the radionuclides thorium-230 ((230)Th) and protactinium-231 ((231)Pa), wh

10 Records of protactinium-231 ((231)Pa) and thorium-230 ((230)Th) in Arctic sediments can provide a

11 arbados corals that have identical 231Pa and thorium-230 (230Th) ages indicate that the timing of sea

12 Ocean based on measurements of two isotopes, thorium-230 and extraterrestrial helium-3, whose burial

13 Thorium-230 dates (uncertainty +/- approximately 10 year

14 Coupled radiocarbon and thorium-230 dates from benthic coral species reveal that

15 Winograd and Coplen question the thorium-230 distribution model proposed to explain the a

16 occurring radionuclides protactinium-231 and thorium-230 in the deep Canada Basin and on the adjacent

17 The initial ratio of radium-226 to thorium-230 is largest in the most primitive lavas, whic

18 The thorium-230-dated records reveal that between 75 and 55

19 of the site is fixed at 7.4 thousand years (thorium-230/uranium dating), with a maximum age between

20 Thorium-232 (Th), the most abundant naturally occurring

21 The thorium-232 data suggest that offshore advection of part

22 on ratios of actinides (like uranium-238 and thorium-232).

23 Thorium-234 ((234)Th), a naturally occurring radionuclid

24 ) carbon atom, leading to the formation of a thorium acetylide complex, [Cp(3)Th(C=CC(Me)Ph(2))] (3),

25 oactive materials (NORM), including uranium, thorium, actinium, radium, lead, bismuth, and polonium i

26 g Pleistocene interglacials from 130 uranium-thorium ages on 72 speleothems, cave deposits that only

27 lopropenyl ring opening and formation of the thorium allenylidene complex, [Li(Et(2)O)(2)][Cp(3)Th(CC

28 )2) into the Th-C bond of the cyclometalated thorium amides [ThN''2(N(SiMe3)(SiMe2CH2))] and K[ThN''(

29 Using the uranium and thorium amides U[N(SiMe3)2]3 and [(Me3Si)2N]2An[kappa(2)

30 as accomplished by treating the redox-active thorium amidophenolate complex, [Th((dipp)ap)(3)][K(15-c

31 oderate to high catalytic activities for the thorium analogues 6-8, among which 8 exhibited the highe

32 Meanwhile, the radioactive element thorium and counterions phosphate and citrate were separ

33 se self-assembled arrays, which are dense in thorium and nitrogen, has also been demonstrated: infini

34 Thorium and potassium are highly concentrated in and aro

35 le heat-producing elements (such as uranium, thorium and potassium) are efficiently scavenged from de

36 The thorium and uranium complexes were obtained in high yiel

37 bonds of 3.0771(5) A and 3.0319(7) A for the thorium and uranium complexes, respectively, were observ

38 onaqueous transuranium chemistry rather than thorium and uranium congeners.

39 The 231Pa-230Th data also constrain the thorium and uranium distribution coefficients for clinop

40 zing role is established for the tetravalent thorium and uranium ions in these systems.

41 ntle, including the heat-generating elements thorium and uranium, which have half-lives longer than t

42 ity, most work with actinides has focused on thorium and uranium.

43 ions of the heat-producing elements uranium, thorium, and potassium.

44 g-lived, heat-producing elements (potassium, thorium, and uranium).

45 ls of the heat-producing elements potassium, thorium, and uranium.

46 blanket, proposed to explain the eruption of thorium- and titanium-rich lunar mare basalts, plausibly

47 e anion, to report one-, two- and three-fold thorium-antimony bonds, thus introducing polar covalent

48 timony multiple bonds are more covalent than thorium-antimony congeners, due to superior spatial and

49 d ThAsTh linkages exhibit polarized-covalent thorium-arsenic multiple bonding interactions, hitherto

50 ic are known; indeed only two complexes with thorium-arsenic single bonds have been structurally auth

51 6 is an unprecedented example of a terminal thorium-arsinidene complex and only the second structura

52 n=2; M=U, n=0) results in the formation of a thorium aryl complex, [Th(2-C6H4CH2NMe2)4] or a uranium

53 that pushing-from-below perhaps occurs with thorium as well as uranium, and with imido ligands as we

54 Moreover, surrounding each thorium atom we find the unusual modulations of hybridiz

55 At each thorium atom, an electronic bound state is observed.

56 Kondo-holes created by substituting spinless thorium atoms for magnetic uranium atoms in the heavy-fe

57 m complexes can be generated by reduction of thorium azide precursors-a route that has failed so far

58 Once isolated, the thorium azide/nitride clusters, M(3)Th=N=Th (M = K or Cs

59 Here, we report evidence that reduction of a thorium-azide produces a transient Th=N triple bond, but

60 s are typically considered a close analog of thorium-based congeners in areas such as material design

61 verviews the design principles of innovative thorium-based materials that could address urgent needs

62 emistry, particularly for the development of thorium-based materials, is experiencing a renaissance o

63 Here we present a mesoporous cationic thorium-based MOF (SCU-8) containing channels with a lar

64 Previously this was dismissed for thorium, being the preserve of uranium-nitrides or the u

65 re we report tetravalent cerium, uranium and thorium bis(carbene) complexes with trans C=M=C cores wh

66 The bis(NHC)borate-supported thorium-bis(mesitylphosphido) complex (1) undergoes reve

67 We describe a bis(NHC)borate thorium-bpy complex (1) that is capable of reductively c

68 tional analyses suggests that the bonding of thorium can be more nuanced, in terms of 5f- versus 6d-o

69 These complexes feature the shortest thorium-carbon bonds ( approximately 2.30 A) reported to

70 ][BPh4], 5, the first example of a molecular thorium carbonyl isolable at room temperature.

71 This represents a rare example of thorium-catalyzed transformations of an alcoholic substr

72 A negative array between thorium/cerium and neodymium-143/neodymium-144 indicates

73 of chalcogen atoms resulting in a series of thorium chalcogenolate complexes, Th(ECH2SiMe3)(L3) (E =

74 Herein, we uncover fundamental principles of thorium chemistry on the example of Th-based extended st

75 ium bond was observed in the crystalline tri-thorium cluster [{Th(eta(8) -C(8) H(8) )(mu(3) -Cl)(2) }

76 oposed to describe the stability of this tri-thorium cluster.

77 Me2 with [Et3NH][BPh4] produces the cationic thorium complex [(C5Me5)2ThMe][BPh4] that can be treated

78 atalytic Tishchenko reaction mediated by the thorium complex [(Im(Dipp)N)Th{N(SiMe3)2}3] (8), exhibit

79 A new, simple mono(imido) thorium complex and the first bis(imido) thorium complex

80 The thorium complex was structurally characterized by X-ray

81 do) thorium complex and the first bis(imido) thorium complex, K[Th( horizontal lineNAr)N''3] and K2[T

82 functionalization of dinitrogen by molecular thorium complexes and are attractive compounds for the s

83 show that stable multimetallic azide/nitride thorium complexes can be generated by reduction of thori

84 isoelectronic, isostructural lanthanide and thorium complexes lends insight into the electronic fact

85 The solution-state behavior of the thorium complexes was evaluated using (1)H, (1)H-(1)H CO

86 bond cleavage, whereas the more redox-robust thorium compounds engage in an acid-base/dehydrocoupling

87 Uranium and thorium concentration and isotopic data are also present

88 ma mass spectrometry (MC-ICP-MS) uranium and thorium concentration and isotopic data obtained by isot

89 Knowledge of uranium and thorium concentrations in geological reservoirs relies l

90 of such specimens were made with respect to thorium, considering it as an internal standard.

91 h H2 forms the known (C5Me5)3ThH as the sole thorium-containing product.

92 , primarily because of problems with uranium/thorium coral dating.

93 In the case of the diamagnetic thorium corrole, variable-temperature, DOSY (diffusion-o

94 ere, we report radiocarbon data from uranium-thorium-dated deep-sea corals in the Equatorial Atlantic

95 s are based on a decadally resolved, uranium/thorium-dated, oxygen isotopic record for much of the pa

96 Uranium-Thorium dating of deep-water corals (DWCs) from 26 north

97 We found, by means of uranium/thorium dating of fossil corals, that sea level during t

98 Uranium-thorium dating of relict tufa deposits indicates sporadi

99 e investigate this hypothesis, using uranium-thorium dating of the Hulopoe gravel (on Lana'i) and a s

100 the Chinese record to cover the full uranium/thorium dating range, that is, the past 640,000 years.

101 c mean +/- 2 standard deviations) by uranium-thorium dating, that sheds light on this crucial event.

102 um material was chemically purified from its thorium decay product at a well-known time.

103 two organometallic monometallic complexes of thorium diazide have been synthesized and characterized.

104 ]2[Se4] or [K(18-crown-6)]2[Te2] affords the thorium dichalcogenides, [K(18-crown-6)][Th(eta(2)-E2)(N

105 ), and one advanced fuel candidate material, thorium dioxide (ThO(2)).

106 able to delay phagolysosomal fusion, we used thorium dioxide and acid phosphatase to label phagolysos

107 mical properties of a nuclear fuel material, thorium dioxide.

108 contain both heavy and light elements, like thorium dioxide.

109 um might be more compatible than uranium and thorium during mantle melting and that high 3He/4He rati

110 rin (TPP) multilayer to an elemental beam of thorium followed by a temperature-programmed reaction an

111 Weaker thorium hydride (ThH1(-4)) absorptions were also observe

112 found to provide syntheses of new classes of thorium hydride compounds.

113 The thorium(III) and uranium(III) analogues of these neptuni

114 he weak hyperfine interactions) in molecular thorium(III) and uranium(III) species and therefore the

115 The thorium-imido moieties were observed to be 3 orders of m

116 44 indicates that significant amounts of the thorium in arc rocks are derived from subducted sediment

117 The detection of thorium in halo and globular cluster stars offers a prom

118 o hosts potassium in addition to uranium and thorium in its structure.

119 lthough perhaps only about 30 percent of the thorium in subducted sediments is returned to the crust

120 ermine average concentrations of uranium and thorium in the continental crust and in the mantle by us

121 ioactivity, reveal the amount of uranium and thorium in the Earth and set limits on the residual prop

122 d high abundances of rare earth elements and thorium in these volcanic glass beads, which could indic

123 high selectivity toward uranium, as well as thorium, in competition with various rare earth metals.

124 s of stabilizing polar linkages at the large thorium ion.

125 with stabilising these linkages at the large thorium ion.

126 ThO2, in which thorium is stable only in a tetravalent state, exhibits

127 Thorium is the most abundant actinide in the Earth's cru

128 Although thorium is traditionally considered to have dominant 6d-

129 ctive elements in KREEP, such as uranium and thorium, is generally thought to provide the thermal ene

130 Uranium, but not thorium, is readily mobilized in the fluid.

131 Maintaining the required gradient of thorium isotope (230)Th over 3.6 meters for 1000 years,

132 Uranium-thorium isotope results from island arc volcanic rocks w

133 Thorium(IV) and uranium(IV) macrocycles of Mes2(p-OMePh)

134 f NC-ArF gives the corresponding fluorinated thorium(IV) bis(ketimide) complexes (C5Me5)2Th[-N=C(CH3)

135 Here we report the first series of in-plane thorium(IV), uranium(IV), and neptunium(IV) expanded por

136 A series of thorium(IV)-imido complexes was synthesized and characte

137 ucturally authenticated examples of a parent thorium(IV)-phosphanide (Th-PH2), a terminal thorium(IV)

138 thorium(IV)-phosphanide (Th-PH2), a terminal thorium(IV)-phosphinidene (Th=PH), a parent dithorium(IV

139 VI) complexes in contrast to those involving thorium(IV).

140 ty, ferric iron alteration, and potassium to thorium (K/Th) ratio, whereas a weak correlation was obs

141 monoselenide and monotelluride complexes of thorium, [K(18-crown-6)][Th(E)(NR2)3] (E = Se, 4; E = Te

142 d the separation of (223,224,225)Ra from the thorium matrix was obtained with an overall recovery yie

143 ] nanocages, the first transition-metal (TM)-thorium metal-organic framework (MOF, 1) has been synthe

144 A new thorium monoalkyl complex, Th(CH2SiMe3)(L3) (L = MeC(N(i

145 Thorium monocarbide (ThC) as a potential fuel for next g

146 Thorium monoxide (ThO) produced in the reaction inserts

147 f-element chemistry, but only one example of thorium nitride isolable from solution was reported.

148 Thorium nitrides are likely intermediates in the reporte

149 main rare and there are not yet any terminal thorium nitrides outside of cryogenic matrix isolation c

150 now being widely studied, yet those with one thorium-nitrogen double bond are rare, and those with tw

151 Computational studies on these thorium-nitrogen multiple bonds consistently evidences a

152 om high/low energy proton irradiated natural Thorium or Radium-226 target.

153 st that the overlap between the 7s/6d hybrid thorium orbitals is so large that the bond still exists

154 A thorium-organic framework (TOF-16) containing hexameric

155 dioxygen in dry air, forming a rare terminal thorium oxo, [O=Th((dipp)isq)(2)((dipp)ap)][K(15-c-5)(2)

156 um-oxygen double bond when compared to other thorium oxos.

157 d a comparatively longer bond length for the thorium-oxygen double bond when compared to other thoriu

158 As such, several thorium-oxygen single bonds were synthesized for compari

159 combining the kinematic tracer protactinium/thorium (Pa/Th) with the deep water-mass tracer, epibent

160 Here, we report thorium parent-arsenide (ThAsH2), -arsinidiides (ThAs(H)

161 hout formation of other secondary uranium or thorium phases.

162 thesized, as evidenced by the formation of a thorium phosphide superlattice.

163 is and structural determination of the first thorium phosphinidene complex are reported.

164 ter spectra along with counting rate maps of thorium, potassium, and iron delineate large composition

165 Radioactive decay of uranium and thorium produces 4He, whereas 3He in the Earth's mantle

166 ds: We compared 4 bifunctional chelators for thorium radiopharmaceutical preparation: S-2-(4-Isothioc

167 The low average uranium/thorium ratios of bulk crust primarily reflect different

168 ve lavas, which also have the highest barium/thorium ratios, and decreases with increasing magmatic d

169 complexes involving other actinides such as thorium remain rare and there are not yet any terminal t

170 A broad thorium-rich and iron-rich ejecta deposit southwest of t

171 kilometre-diameter granitic system below the thorium-rich farside feature known as Compton-Belkovich.

172 w recognized to sit on the downrange rim and thorium-rich impact ejecta of the basin.

173 These observations indicate that thorium-rich magma ocean liquids persisted only beneath

174 Uranium/thorium series analysis of speleothems brackets the Plei

175 Recent geochemical studies of uranium-thorium series disequilibrium in rocks from subduction z

176 ch core would partition uranium strongly and thorium slightly, supplying a substantial part of the 'm

177 e-Holocene landforms dated using the uranium-thorium soil carbonate and beryllium-10 surface exposure

178 mplex 6 represents the first alkyl disulfide thorium species and illustrates the ability of 2 to unde

179 commensurate with those indicated by uranium-thorium studies.

180 t-producing elements--potassium, uranium and thorium--such removal would make it extremely difficult

181 to validate the approach: binary uranium and thorium sulfides, oxide to sulfide transformation in sol

182 volving isolation of (211)At from irradiated thorium targets, we developed a method for (211)At isola

183 of surplus molecules yields bis(porphyrinato)thorium (Th(TPP)(2)) assemblies on Ag(111) and hexagonal

184 rium (Ba), and a sediment melt that supplies thorium (Th) and the light rare earth elements.

185 ver concentration of the ultra-trace element thorium (Th) can provide a signature of bedrock fracture

186 -first-century renaissance of organometallic thorium (Th) through plutonium (Pu) chemistry(4-12), and

187 n enthalpies found for two related series of thorium (Th)-nitrate molecular compounds obtained by eva

188 tassium (K, 1150 +/- 220 parts per million), thorium (Th, 220 +/- 60 parts per billion), and uranium

189 new (rare earth uranium sulfides and alkali-thorium thiophosphates) and previously reported compound

190 A unique thorium-thorium bond was observed in the crystalline tri

191 Here, we report thorium-thorium bonding in a crystalline cluster, prepar

192 Furthermore, attempts to prepare thorium-thorium bonds in frozen matrices have produced o

193 For thorium, under ambient conditions only a few multiple bo

194 For thorium, under ambient conditions only a few multiple bo

195 terobimetallics has been prepared, featuring thorium, uranium, and cobalt.

196 os with proxies for curium/uranium (that is, thorium/uranium and neodymium/uranium) provides strong e

197 This suggests pushing-from-below for thorium, where 6p-orbitals principally interact with fil

198 Uranium and thorium within the Earth produce a major portion of terr

199 ched in mantle melts relative to uranium and thorium, yet estimates of helium partitioning in mantle