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38 results on '"Manchanda, Vijay K."'

11. Overview of the KoRIA Facility for Rare Isotope Beams

Author

Ahn, Jung Keun, Bak, Sang In, Blumenfeld, Yorick, Chai, Jong-Seo, Cheon, Byung-Gu, Cheoun, Myung-Ki, Cho, Donghyun, Cho, Yong Sub, Choi, Bong Hyuk, Choi, Chang Ill, Choi, Eun Mi, Choi, Hyo Jung, Choi, Min Sik, Choi, Seonho, Choi, Tae Keun, Choi, Yeon Suk, Chung, Kie Hyung, Ha, Eun Ja, Ha, Jang Ho, Hahn, In Sik, Han, Jae Min, Han, Jang Min, Hong, Byungsik, Hong, Seung-Woo, Hong, Wan, Hwang, Sang Hoon, Hyun, Chang Ho, Jang, Doh Yun, Jang, Jaeho, Jeon, Dong-o, Jeong, Doo, Jeong, Sun-Chan, Jhang, Genie, Joo, Eunah, Kadi, Yacine, Kang, Byoung Hwi, Kang, Hoon Su, Kim, Aram, Kim, Do Yoon, Kim, Dong Lak, Kim, Dong Uk, Kim, Eun Joo, Kim, Gi Dong, Kim, Hyun-Chul, Kim, In Gyu, Kim, Jong Tae, Kim, Jong Won, Kim, Joon Kon, Kim, Sang-Ho, Kim, Sang-hoon, Kim, Sung Hyun, Kim, Wooyoung, Kim, Yong Kyun, Ko, Seung Kook, Kwon, Myeun, Kwon, Young Kwan, Lee, Bo Young, Lee, Byoung Noh, Lee, Chang Hwan, Lee, Cheol Woo, Lee, Chun Sik, Lee, Kyong Sei, Lee, Hee Jung, Lee, Hee-Seock, Lee, Hyo Sang, Lee, Ju Hahn, Lee, Kang Ok, Lee, Kang Seog, Lee, Sang Duk, Lee, Seok Kwan, Lee, Su Houng, Lee, Young Sung, Lee, Young-Ouk, Lee, Yong Yung, Manchanda, Vijay K., Moon, Chang Bum, Nam, Seung-il, Namkung, Won, Nolen, Jerry A., Oh, Byung Hoon, Oh, Jin Hwan, Oh, Yongseok, Park, Byung Yoon, Park, Jin Ah, Park, Jin Yong, Park, Ki Hyeon, Park, Se Hwan, Park, Tae-Sun, Park, Woo-Yoon, Ryu, Chung Yeol, Ryu, Min Sang, Ryu, Sun Young, Sakai, Hideyuki, Seo, Hee Jeong, Shin, Jae Won, Shin, Seung Wook, Sigg, Peter, Sim, Kwang Souk, So, Woon Young, Song, Ho Seung, Song, Tae Yung, Suh, Byoung Jin, Tenreiro, Claudio, Tong, Zhou, Tribble, Robert E., Woo, Hyung Ju, Yano, Yasushige, Yang, Hae-Ryong, Yang, Young Ku, Yeon, Yeong Heum, Yi, Won Ju, Yu, Byung Geel, Yu, Dai Hyuk, Yoo, In-Kwon, Yu, Seon Young, and Yun, Chong Cheoul

Published
2013
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18. Evaluation of terrestrial plants extracts for uranium sorption and characterization of potent phytoconstituents.

Author

Sharma, Sunita, Singh, Bikram, Thulasidas, S. K., Kulkarni, Madhuri J., Natarajan, V., and Manchanda, Vijay K.

Subjects
PLANT extracts, FUNARIACEAE, URANIUM, SORPTION, BRASSICA juncea, RADIOISOTOPES, FLAVONOIDS
Abstract

Sorption capacity of four plants(Funaria hygrometrica, Musa acuminata, Brassica junceaandHelianthus annuus)extracts/fractions for uranium, a radionuclide was investigated by EDXRF and tracer studies. The maximum sorption capacity, i.e., 100% (complete sorption) was observed in case ofMusa acuminataextract and fractions. Carbohydrate, proteins, phenolics and flavonoids contents in the active fraction (having maximum sorption capacity) were also determined. Further purification of the most active fraction provided three pure molecules, mannitol, sorbitol and oxo-linked potassium oxalate. The characterization of isolated molecules was achieved by using FTIR, NMR, GC-MS, MS-MS, and by single crystal-XRD analysis. Of three molecules, oxo-linked potassium oxalate was observed to have 100% sorption activity. Possible binding mechanism of active molecule with the uranyl cation has been purposed. [ABSTRACT FROM AUTHOR]

Published
2016
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19. Solvent-free biocatalytic amidation of carboxylic acids

Author

Prasad, Ashok K., Husain, Mofazzal, Singh, Brajendra K., Gupta, Rajinder K., Manchanda, Vijay K., Olsen, Carl Erik, Parmar, Virinder S., Prasad, Ashok K., Husain, Mofazzal, Singh, Brajendra K., Gupta, Rajinder K., Manchanda, Vijay K., Olsen, Carl Erik, and Parmar, Virinder S.

Published
2005

21. Overview of the KoRIA Facility for Rare Isotope Beams

Author

Ahn, Jung Keun, primary, Bak, Sang In, additional, Blumenfeld, Yorick, additional, Chai, Jong-Seo, additional, Cheon, Byung-Gu, additional, Cheoun, Myung-Ki, additional, Cho, Donghyun, additional, Cho, Yong Sub, additional, Choi, Bong Hyuk, additional, Choi, Chang Ill, additional, Choi, Eun Mi, additional, Choi, Hyo Jung, additional, Choi, Min Sik, additional, Choi, Seonho, additional, Choi, Tae Keun, additional, Choi, Yeon Suk, additional, Chung, Kie Hyung, additional, Ha, Eun Ja, additional, Ha, Jang Ho, additional, Hahn, In Sik, additional, Han, Jae Min, additional, Han, Jang Min, additional, Hong, Byungsik, additional, Hong, Seung-Woo, additional, Hong, Wan, additional, Hwang, Sang Hoon, additional, Hyun, Chang Ho, additional, Jang, Doh Yun, additional, Jang, Jaeho, additional, Jeon, Dong-o, additional, Jeong, Doo, additional, Jeong, Sun-Chan, additional, Jhang, Genie, additional, Joo, Eunah, additional, Kadi, Yacine, additional, Kang, Byoung Hwi, additional, Kang, Hoon Su, additional, Kim, Aram, additional, Kim, Do Yoon, additional, Kim, Dong Lak, additional, Kim, Dong Uk, additional, Kim, Eun Joo, additional, Kim, Gi Dong, additional, Kim, Hyun-Chul, additional, Kim, In Gyu, additional, Kim, Jong Tae, additional, Kim, Jong Won, additional, Kim, Joon Kon, additional, Kim, Sang-Ho, additional, Kim, Sang-hoon, additional, Kim, Sung Hyun, additional, Kim, Wooyoung, additional, Kim, Yong Kyun, additional, Ko, Seung Kook, additional, Kwon, Myeun, additional, Kwon, Young Kwan, additional, Lee, Bo Young, additional, Lee, Byoung Noh, additional, Lee, Chang Hwan, additional, Lee, Cheol Woo, additional, Lee, Chun Sik, additional, Lee, Kyong Sei, additional, Lee, Hee Jung, additional, Lee, Hee-Seock, additional, Lee, Hyo Sang, additional, Lee, Ju Hahn, additional, Lee, Kang Ok, additional, Lee, Kang Seog, additional, Lee, Sang Duk, additional, Lee, Seok Kwan, additional, Lee, Su Houng, additional, Lee, Young Sung, additional, Lee, Young-Ouk, additional, Lee, Yong Yung, additional, Manchanda, Vijay K., additional, Moon, Chang Bum, additional, Nam, Seung-il, additional, Namkung, Won, additional, Nolen, Jerry A., additional, Oh, Byung Hoon, additional, Oh, Jin Hwan, additional, Oh, Yongseok, additional, Park, Byung Yoon, additional, Park, Jin Ah, additional, Park, Jin Yong, additional, Park, Ki Hyeon, additional, Park, Se Hwan, additional, Park, Tae-Sun, additional, Park, Woo-Yoon, additional, Ryu, Chung Yeol, additional, Ryu, Min Sang, additional, Ryu, Sun Young, additional, Sakai, Hideyuki, additional, Seo, Hee Jeong, additional, Shin, Jae Won, additional, Shin, Seung Wook, additional, Sigg, Peter, additional, Sim, Kwang Souk, additional, So, Woon Young, additional, Song, Ho Seung, additional, Song, Tae Yung, additional, Suh, Byoung Jin, additional, Tenreiro, Claudio, additional, Tong, Zhou, additional, Tribble, Robert E., additional, Woo, Hyung Ju, additional, Yano, Yasushige, additional, Yang, Hae-Ryong, additional, Yang, Young Ku, additional, Yeon, Yeong Heum, additional, Yi, Won Ju, additional, Yu, Byung Geel, additional, Yu, Dai Hyuk, additional, Yoo, In-Kwon, additional, Yu, Seon Young, additional, and Yun, Chong Cheoul, additional

Published
2012
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29. Phosphonates as alternative to tributyl phosphate for the separation of actinides from fission products.

Author

Vyas, Chirag K., Brahmmananda Rao, C. V. S., Jayalakshmi, S., Joshirao, Pranav M., and Manchanda, Vijay K.

Subjects
PHOSPHONATES, ORGANOPHOSPHORUS compounds, ACTINIDE elements, FISSION products, SEPARATION (Technology), EXTRACTION (Chemistry)
Abstract

The present work investigates the role of increase in the basicity of organophosphorus extractant (dialkylalkyl phosphonates) on the uptake of actinides and fission products vis-à-vis tributyl phosphate (TBP), currently employed as a universal extractant. Two dialkylalkyl phosphonates viz. dibutylpropyl phosphonate (DBPrP) and dibutylpentyl phosphonate (DBPeP) were synthesized, characterized and evaluated for their solvent extraction behavior towards U(VI), Th(IV), Eu(III) and Tc(VII) in nitric acid medium ranging from 0.01-6 M. It was observed that increasing the basicity of the phosphoryl oxygen enhanced the uptake of the actinides and the distribution coefficient values were significantly larger as compared to TBP. The limiting organic concentration (LOC) value was estimated for Th(IV) for these extractants and compared with the TBP system. The separation factors of actinides with phosphonates over Tc(VII) are distinctly better than that with TBP. [ABSTRACT FROM AUTHOR]

Published
2015
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35. Uranium preconcentration from seawater using phosphate functionalized poly(propylene) fibrous membrane.

Author

Dasa, Sadananda, Pandey, Ashok K., Athawale, Anjali A., Natarajana, V., and Manchanda, Vijay K.

Subjects
URANIUM, SEAWATER thermodynamics, ETHYLENE glycol, ADSORPTION (Chemistry), METHYL methacrylate, PHOSPHATES
Abstract

The poly(ethylene glycol methacrylate phosphate) macroporous membranes (PEGMP-membrane) were prepared by grafting of ethylene glycol methacrylate phosphate onto the poly(propylene) fibrous sheets using UV-irradiation and electron beam. The PEGMP-membrane samples thus prepared were characterized in terms of water uptake capacity, uranium uptake efficiency under seawater conditions, uranium distribution in the membrane samples, desorption and reusability of the membrane for uranium preconcentration. The uranium sorption capacity of the PEGMP membrane was found to be appropriate (1.4 x 10-3 mol/g) for using it in adsorptive mode for preconcentration of uranium from the lean aqueous feed. The functional group density based on the gravimetrically measured weight of PEGMP anchored in the membrane sample was calculated to be 3.2 x 10 -3 mol/g. The comparison of expected functional group density and uranium uptake capacity seems to suggest that UO Due to image rights restrictions, multiple line equation(s) cannot be graphically displayed. forms complex with EGMP units in 1:2 proportion in the membrane. The uranium could be desorbed from PEGMP-membrane quantitatively (>95%) by equilibration in well-stirred 0.5 M Na2CO3 for 10 min. The membrane could be reused without any conditioning for uranium re-sorption. The studies carried out in the present work indicated potential applications of the PEGMP-membrane for adsorptive preconcentration of uranium from seawater and other natural waters. [ABSTRACT FROM AUTHOR]

Published
2012
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36. Separation of Carrier Free 90Y from 90Sr by Hollow Fiber Supported Liquid Membrane Containing Bis(2-ethylhexyl) Phosphonic Acid.

Author

Kandwal, Pankaj, Ansari, Seraj A., Mohapatra, Prasanta K., and Manchanda, Vijay K.

Subjects
YTTRIUM isotopes, HOLLOW fibers, STRONTIUM isotopes, SOLVENT extraction, SEPARATION (Technology), LIQUID membranes, PHOSPHONIC acids
Abstract

The present article gives a comparative account of the efficiency of carrier-free 90Y separation from 90Sr by solvent extraction, flat sheet-supported liquid membrane (FSSLM) and hollow fiber-supported liquid membrane (HFSLM) methods using bis(2-ethylhexyl) phosphonic acid (PC88A) as the carrier extractant. The major focus of this work has been to develop the HFSLM method for the separation of Y(III) on a relatively large scale. The feed and receiver phase conditions were optimized by carrying out batch solvent-extraction studies. The extraction of Sr(II) by PC88A was negligible in the acidity range of 0.01-3 M HNO3, whereas the extraction of Y(III) was significantly large at lower acidity (≤0.1 M HNO3) with a separation factor (SF = DY/DSr) of 8.5 × 104. HFSLM studies suggested selective and efficient transport of Y(III) into 3 M HNO3 from a feed solution containing a mixture of Y(III) and Sr(II) at 0.1 M HNO3. On the other hand, transport of Sr(II) was negligible in the receiver phase. The purity of the separated 90Y was ascertained by paper chromatography and by half-life measurement. The radiation stability of the carrier was excellent as studied up to 1000 KGy dose. [ABSTRACT FROM AUTHOR]

Published
2011
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37. Preferential leaching of Sr from mixed (Th/Sr) oxide

Author

Vyas, Chirag K., Joshirao, Pranav M., Shukla, Rakesh, Natarajan, V., and Manchanda, Vijay K.

Abstract

Preferential leaching of Sr from irradiated thorium may play an important role to facilitate the management of high level waste as well as provide a new route to recover valuable fission product 90Sr which has potential applications as (a) compact heat source and (b) as parent radionuclide for 90Y, used in therapeutic radiopharmaceuticals. In the present work, leaching of Sr from (Th,Sr)O2in nitric acid and perchloric acid medium has been investigated as a function of acidity as well as refluxation time. It was interesting to observe that quantitative leaching of Sr(II) is possible even at 0.01M HClO4where leaching of Th is negligible (∼0.01%). Leaching behavior of other metal ions, like Pd(II), Y(III), and Zr(IV), representing few major fission products was also investigated.

Published
2014
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38. Perchloric acid: A promising medium for the chromatographic separation of 90Y from 90Sr.

Author

Vyas, Chirag K., Joshirao, Pranav M., and Manchanda, Vijay K.

Subjects
*PERCHLORIC acid, *CHROMATOGRAPHIC analysis, *SEPARATION (Technology), *HYDROCHLORIC acid, *NITRIC acid, *RADIOPHARMACEUTICALS
Abstract

Highlights: [•] Chromatographic separation of 90Y from 90Sr. [•] Sequential use of Sr-selective column and Y-selective column. [•] Perchloric acid is better medium than hydrochloric acid/nitric acid. [•] Final product in 0.01M EDTA is amenable for radiopharmaceutical application. [ABSTRACT FROM AUTHOR]

Published
2014
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