Meyen, A. L.; Molstad, M. C. Adsorption of Dilute Solutes From Liquid Mixtures. Trans. Faraday SOC. 1970,66, 2354. Starshov, I. M.; Ivanova, G. Y.; Minnibaeva, L. I. Neftepererab. Neftekhim. 1973,2, 31. Stuckhov, G.; Petrenko, D. S.; Geyid, Y. P.; Keltsev, N. B. Khim. Technol. 1975, I , 16. ratus V. Kapaku Sochi 1976.18.52. Suzuki, K.; Monoi, Y. Practical Designing of an Adsorption Appa-Teo, W. K.; Rithven, D. M. Adsorption of Water from Aqueous Ethanol Using 3A Molecular Sieves. Znd. Eng. Chem. Prod. Des. Dev. 1986, 25, 17. Waxman, M. H.; Gregor, H. P.; Sundheim, B. R. Studies on Ion Exchange Resins. VI Water Vapor Sorption by Polystyrenesulphonic Acid Resins.A 0.9-m-high fixed bed charged with hollow fibers containing amidoxime groups was placed on the coast of the Pacific Ocean for the recovery of uranium from seawater. Continuous flow of seawater a t a superficial velocity of 4 cm/s provided an averaged uranium content of 0.97 g of U/kg in the amidoxime hollow fiber along the bed after 30 days contact. An elution curve having a 230 g of U/m3 peak concentration and a 45 g of U/m3 integrated concentration of uranium was obtained at a superficial velocity of 1 N HC1 of 0.0125 cm/s. The required cross-sectional area of the amidoxime hollow fiber-packed bed to produce 10 kg of U per annum was calculated as 9.4 m2 with a 0.9-m bed height.Amidoxime fiber adsorbents are prepared by treating commercial poly(acrylonitri1e) fibers with

Alpha particle-emitting radionuclides have gained considerable attention for radionuclide therapy. Astatine-211 ( 211 At) is a promising alpha particle-emitting radionuclide. 211 At is a halogen that has similar chemical properties to iodine and exhibits a half-life of 7.2 h. However, direct labeling of proteins or peptides into the tyrosine residue with 211 At was shown to be impractical. Herein, we demonstrate a novel 211 At-labeling method using the RGD peptide as a model peptide. An 211 At-labeled RGD peptide, [ 211 At]c[RGDf(4-At)K], was prepared from a precursor with a tributylstannyl group on the phenylalanine residue in c(RGDfK) with a radiochemical yield of 63% and a radiochemical purity of >96%, and its potential for targeted radionuclide therapy was evaluated. Based on the results of biodistribution experiments, [ 125 I]c[RGDf(4-I)K] and [ 211 At]c[RGDf(4-At)K] showed high accumulation in the tumor and similar biodistribution. This study provides useful information for radiotheranostics between an 211 At-labeled peptide and the corresponding radioiodine-labeled peptide.

Radiolabeled cyclic peptides containing the (Arg-Gly-Asp) RGD sequence for use in positron emission tomography (PET) imaging, single-photon emission computed tomography (SPECT) imaging, and targeted radionuclide therapy of cancer have been reported. In this study, RGD was used as a model carrier peptide for diagnosis and therapy of cancer.

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A Ni(NTf2)2 and tetradentate bisimino-bisquinoline ligand complex catalyzed the enantioselective Nazarov cyclization of heteroaryl vinyl ketones. An X-ray-quality crystal was obtained from a mixture of the Ni complex and the substrate, which was the dinuclear chiral Ni complex. From information regarding the structure of the complex, the substrate was distorted to form a helical shape, and the carbon atoms involved in bond formation were close to each other. In addition, mechanistic studies revealed that the configuration of the olefin moiety was isomerized before bond formation.