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Start Over Author "Roy, Ipsita" Publication Type Books
37 results on '"Roy, Ipsita"'

7. Contributors

Author

Banerjee, Rintu, primary, Borbás, R., additional, Coetzer, Theresa Helen Taillefer, additional, Dennison, Clive, additional, Duman, Yonca, additional, Eyssen, Lauren E-A, additional, Gagaoua, Mohammed, additional, Goldring, James Philip Dean, additional, Gujjala, Lohit Kumar Srinivas, additional, Gupta, Munishwar Nath, additional, Garlapati, Vijay Kumar, additional, Kiss, É., additional, Kumar, S. P. Jeevan, additional, Luong, John H.T., additional, Marathe, Sandesh J., additional, Rathod, Virendra K., additional, Roy, Ipsita, additional, Shah, Nirali N., additional, Singhal, Rekha S., additional, and Yan, Jing-Kun, additional

Published
2021
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14. List of Contributors

Author

Ahuja, Christopher S., primary, Alonso, Marta M., additional, Arvanian, Victor L., additional, Ayers, Jacob I., additional, Chakrabarty, Paramita, additional, Chaudhary, Rajeev K., additional, Chen, Zhiguo, additional, Czerniewski, Leah, additional, Duan, Dongsheng, additional, Fehlings, Michael G., additional, Fong, Dahna M., additional, Fueyo, Juan, additional, Fukuchi, Ken-ichiro, additional, Gao, Yandi, additional, Gomez-Manzano, Candelaria, additional, Han, Renzhi, additional, Han, Zongchao, additional, Hao, Shuanglin, additional, Holtzman, David M., additional, Joo, Kyeung M., additional, Joyce, Jillian L., additional, Kaplitt, Michael G., additional, Khazaei, Mohamad, additional, Kodippili, Kasun, additional, Kou, Jinghong, additional, Kraft, Andrew W., additional, Kügler, Sebastian, additional, Lalonde, Robert, additional, Lee, Jin-Moo, additional, Lee, Young E., additional, Li, Mingjie, additional, Marongiu, Roberta, additional, Martínez-Vélez, Naiara, additional, Patel, Kinjal A., additional, Patiño-García, Ana, additional, Paul, Sudhir, additional, Petrosyan, Hayk A., additional, Planque, Stephanie A., additional, Roh, JeeHoon, additional, Rosenthal, Zachary P., additional, Roy, Ipsita, additional, Siddiqui, Ahad M., additional, Snider, B. Joy, additional, Song, Min, additional, Wang, Shuyan, additional, Wood, Matthew D., additional, Wu, Angela, additional, Xu, Li, additional, Yang, Junling, additional, Young, Deborah, additional, and Zhang, Yu Alex, additional

Published
2018
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35. Use of Immobilized Biocatalysts in Fluidized Bed Format.

Author

Walker, John M., Guisan, Jose M., Roy, Ipsita, and Gupta, Munishwar N.

Abstract

In a fluidized bed reactor, the substrate solution is fed from the lower end of the bed at a velocity high enough to lift the biocatalyst containing beads. Such reactors are especially valuable when the substrate solution contains particulate matter. The mass transfer in a fluidized bed is better as compared with packed beds. For optimum interaction between the biocatalyst and the substrate, the fluidization velocity needs to be optimized. This illustrative protocol describes a somewhat novel concept in which preparations of glucoamylase and pullulanase were entrapped in different populations of calcium alginate beads. These two entrapped enzyme preparations were premixed in the desired ratio to form a fluidized bed reactor that was used for hydrolysis of starch to glucose. The approach is different from coimmobilization because it allows one to blend the two enzymes in different ratios for optimum bioconversion. [ABSTRACT FROM AUTHOR]

Published
2006
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36. Bioaffinity Immobilization.

Author

Walker, John M., Guisan, Jose M., Roy, Ipsita, and Gupta, Munishwar N.

Abstract

In bioaffinity immobilization, the enzyme/protein is immobilized via bioaffinity interactions. A large number of affinity pairs such as lectin-sugar, antigen-antibody, and biotin-avidin are known. The use of affinity tags to create fusion proteins that can bind to the desired matrix expands the list further and leads to a more or less a general method. Two versions of bioaffinity immobilization are possible. In the first, the matrix is precoupled to an affinity ligand and the target enzyme is added. In the second, the enzyme is conjugated to another molecule that in turn has affinity toward a matrix. The bioconjugate of the enzyme can be obtained either by chemical cross-linking preparation or as a fusion protein. The concept of bioaffinity immobilization is illustrated with a protocol that utilizes the second approach. A conjugate of β-galactosidase with lectin, concanavalin A, was prepared by cross-linking with glutaraldehyde. The conjugate was bound to Sephadex G-50. The protocol was originally developed for creating an immobilized biocatalyst for lactose hydrolysis. Lactose hydrolysis is biotechnologically relevant for whey hydrolysis and for producing low-lactose milk (for consumption by lactose intolerant persons) [ABSTRACT FROM AUTHOR]

Published
2006
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37. Design of Smart Biocatalysts.

Author

Walker, John M., Guisan, Jose M., Roy, Ipsita, and Gupta, Munishwar N.

Abstract

Smart polymers are water-soluble polymers that can be precipitated by an appropriate stimulus such as change of pH, ionic strength, temperature, or addition of a chemical species. Such polymers occur naturally (e.g., alginate, chitosan) but can also be synthesized chemically (e.g., methyl methacrylate polymers available commercially as Eudragit™). Linking of an enzyme to these polymers by noncovalent or covalent methods gives a biocatalyst that can be used as a homogeneous catalyst but can be recovered for possible re-use (after the reaction) by applying appropriate stimulus. The illustrative protocol shows that xylanase could be adsorbed on Eudragit L-100 and this reversibly soluble-insoluble biocatalyst could be used for hydrolysis of xylan. Interestingly, the adsorption removed cellulase impurity. This is useful for paper pulp bleaching because xylanase should be free of cellulase activity. The soluble Eudragit-xylanase conjugate could be studied by circular dichroism spectroscopy to examine conformational changes in enzymes on immobilization on Eudragit L-100. [ABSTRACT FROM AUTHOR]

Published
2006
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