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S. K. Patil A. G. Godbole R. Swarup 《Journal of Radioanalytical and Nuclear Chemistry》1980,60(1):31-44
Synergistic extraction studies on Np(VI) and Pu(VI) have been carried out as a part of the programme on the synergistic extraction
of hexavalent actinides. Extraction of Np(VI) and Pu(VI) were carried out by mixtures of HTTA and TBP in benzene from aqueous
perchlorate and nitrate media. Equilibrium constant values for the various reaction equilibria involved were calculated from
the data obtained by using slope-ratio as well as Job’s method. The extraction of Np(VI) by the synergistic mixture from 1M
nitric acid indicated that the species NpO2 (TTA) (NO3). TBP was not involved in the extraction. The log values of KA, KAB and βAB were −1.5, 2.92 and 4.43, respectively for Np(VI) and −1.63, 2.50 and 4.13 respectively for Pu(VI). 相似文献
4.
Ohne ZusammenfassungÜbersetzt von Dr. K. Jäckel, Marburg/L.Wir danken Herrn Prof. N. R. Dhar D.Sc. (London und Paris), F.R.I.C., F.N.I., I.E.S. (Eetd) Direktor Shila Dhar Institut für Bodenkunde und Vorstand der Chemischen Abteilung, Universität Allahabad, für sein lebhaftes Interesse und seine Ratschläge für die Arbeit. 相似文献
5.
Swarup Narain Tewari 《Mikrochimica acta》1967,55(4):704-707
Summary A paper Chromatographic technique on salt-buffered papers for separating the alkaloids of opium has been devised. The method has been used for determining the origin of opium samples by studying the pattern of theR
f
values of the alkaloids present and the effect on it produced by the presence of various adulterants.
Zusammenfassung Die chromatographische Trennung der Opiumalkaloide auf gepuffertem Papier wurde beschrieben. Das Verfahren wurde zur Herkunftsbestimmung von Opiumproben auf Grund desR f -Musters der anwesenden Alkaloide benützt. Der Einfluß verschiedener Fälschungszusätze wurde untersucht.
Résumé Mise au point d'une technique de Chromatographie sur papier pour la séparation des alcaloïdes de l'opium, oú les papiers sont imprégnés des sels tampons. Utilisation de la méthode pour déterminer l'origine des échantillons d'opium en étudiant les valeurs duR f des alcaloïdes présents et l'effet produits sur celles-ci par la présence d'adultérants divers.相似文献
6.
M. M. Charyulu K. Venugopal Chetty D. G. Phal Veena Sagar SagarD. M. Sagar S. M. Pawar R. Swarup V. V. Ramakrishna V. Venugopal 《Journal of Radioanalytical and Nuclear Chemistry》2002,251(1):153-154
Recovery of americium from nitric acid solutions was studied by co-precipitation as hydroxide with various ions like calcium, ferric, nickel using sodium hydroxide and ammonium hydroxide. Studies were also carried out to recover americium using lanthanum fluoride and bismuth phosphate co-precipitation. All the methods are able to co-precipitate Am quantitatively. However, co-precipitation of Am with optimum concentration iron using ammonia is found to be better from nitric acid solutions containing large concentrations of calcium ions. Approximately 2 g of Am was recovered from 150 litres of solution batch wise using iron. 相似文献
7.
V. R. Bhandiwad Rajendra Swarup S. K. Patil 《Journal of Radioanalytical and Nuclear Chemistry》1979,52(1):5-14
The extraction of Np(IV), Pu(IV) and U(VI) from aqueous hydrochloric acid into quaternary amines has been studied. The dependence
of the distribution coefficient on amine concentration suggests that the actinide ions extracted are NpCl
6
2−
PuCl
6
2−
and UO2Cl
4
2−
. This is further supported by the absorption spectra of the amine extracts of these actinide ions. Based on the extraction
data obtained, a simple method for the separation of typical metal ions such as Cs, lanthanides and Zr from U(VI) and Pu(IV)
is suggested. 相似文献
8.
Amit M. Jabgunde Rahul S. Patil Swarup De Eveline Lescrinier Steven De Jonghe Leonid Beigelman Piet Herdewijn 《Tetrahedron》2019,75(8):1107-1114
The synthesis of 3′-fluoro-4′-amino-hexitol nucleosides with a uracil and cytosine nucleobase was performed. The synthesis started from 1,5:2,3-dianhydro-4,6-benzylidene-allitol and afforded the target compounds in 15 steps. These protected hexitol nucleosides are valuable building blocks for the preparation of a new class of oligonucleotides. 相似文献
9.
Kyungmin Lim Do-Kyung Kim Jae Bum Jeong Suyoung Choi Swarup Biswas Alexandra Tibaldi 《Molecular Crystals and Liquid Crystals》2019,687(1):113-117
AbstractWe demonstrate the electrical properties of nano energy harvesters (NEHs) with various textiles for smart textiles that can be applied to the next generation wearable electronics. Output voltages and currents of NEHs with various fabrics, such as a cotton, rayon and wool that have different triboelectricity were measured. Cotton, rayon and wool shows the maximum output voltages of 1.250, 3.313 and 4.063 V, respectively. In addition, output currents of those textiles were 0.75, 4.4, 1.063 μA, respectively. Wool, in particular, which has the highest triboelectricity of 350 V exhibits the highest output voltage. 相似文献
10.
Pyrimido[4,5-d]pyrimidine derivatives 4 have been prepared in an efficient and regioselective manner in water via multi-component reaction of isothiocyanate 1, aromatic aldehyde 2, N,N-dimethyl-6-amino uracil 3 in the presence of p-toluenesulfonic acid (p-TSA) as a Lewis acid catalyst. 相似文献