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1,033 results on '"Jones, R. D."'

4. Isolation and Screening of Probiotic Bacteria from the Gut of Polychaetes as a Probiotic Potential for Fish Aquaculture.

Author

Balasubramanian, S., Thomas, T. Bettin, Mathavan, D., Kumar, R. Sathish, Uma, G., Jones, R. D. Stevens, and Citarasu, T.

Subjects
FISH farming, DIGESTIVE enzymes, POLYCHAETA, PROBIOTICS, FISH pathogens, BACILLUS subtilis, AMYLOLYSIS
Abstract

In the present study, a total of 17 morphologically different gut-associated bacteria were isolated from four species of estuarine polychaetes: polychaetes Capitella capitata, Scalibregma inflatum, Dendronereis aesturiana, and Namalycastis abiuma. The isolated strains were evaluated for their probiotic activities, such as digestive enzymes including protease, amylase, and lipase, and antimicrobial activities by the agar well diffusion method against fish pathogens. Based on their better enzymatic and antibacterial activities, two bacterial strains, CMST Poly1 and CMST Poly2, were selected for further probiotic studies. Based on the biochemical and morphological characterization, both probiotic strains were characterized as Gram-positive, rod-shaped, non-motile, non-spore-forming, homofermentative, absence of catalyzing enzymes and notable proteolytic activity, and susceptibility to various antibiotics. Further, these two strains were confirmed by 16S rRNA gene sequence analysis as Bacillus subtilis CMST Poly1 and Priestia megaterium CMST Poly2. Our results revealed that strains Bacillus subtilis CMST Poly1 and Priestia megaterium CMST Poly2 can potentially be used as probiotic strains in aquaculture applications. [ABSTRACT FROM AUTHOR]

Published
2023

5. Studies on influence of various stages of mulberry leaf in the growth and cocoonic parameters of silkworm Bombyx mori (L.).

Author

Nila, J. Nihal and Jones, R. D. Stevens

Abstract

The objective of this work was to determine the effects of different stages of mulberry leaves on growth performance of treated larvae of Bombyx mori (L.) (Lepidoptera, Bombycidae) and characters of the resulted cocoons were evaluated. Results showed that the food consumption rate and assimilation rate were greatest for larvae fed on tender and over matured mulberry leaves as compared to larvae fed on mature leaves. Assimilation and conversion efficiencies were very high in the larvae grown on matured mulberry leaves (0.189 and 1.99% respectively). Moreover, the larvae fed on matured mulberry leaves showed higher growth rate, cocoon weight and shell ratio. Among the three different growth stages of leaves, the matured leaves were found to be the best food for final instar larvae of Bombyx mori L. which promotes maximum larval growth and it gains to quality cocoon and raw silk production. [ABSTRACT FROM AUTHOR]

Published
2023
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7. Nn

Author

Abeles, Ronald P., Simms, Ericka Nus, Johnson, Debra L., Jones, R. D., Williams, Paula G., Costanzo, Erin S., Franc, Christopher R., Cartwright, Yolanda, Story, Mary, Christensen, Alan J., editor, Martin, René, editor, and Smyth, Joshua Morrison, editor

Published
2004
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8. Revision

Author

Buechel, F. F., Fitzek, J. G., Jones, R. D., Hamelynck, Karel J., editor, and Stiehl, James B., editor

Published
2002
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20. Problems and Solutions

Author

Andersson, Josef, Duncan, Dewey, Silverman, David L., Smith, C. D., Butler, Ronald, Makowski, Andrzej, Trigg, C. W., Waterhouse, W. C., Demir, Huseyin, Labelle, Gilbert, Nagara, Prasert Na, Thomas, Paul D., Pinzka, Charles F., Gallego-Diaz, J., Funkenbusch, W. W., Klamkin, Murray S., Squire, William, Carlitz, L., Alfred, U., Jones, R. D. H., Andrushkiw, Joseph W., Sarber, Richard E., Gandhi, J. M., Maley, Charles E., and Moser, Leo

Published
1962
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