Search

Your search keyword '"Shadrack, Ronick Spenly"' showing total 10 results
Start Over Author "Shadrack, Ronick Spenly"
10 results on '"Shadrack, Ronick Spenly"'

4. Effects of Single and Mixture Probiotic Supplements on Growth, Digestive Activity, Antioxidative Status, Immune and Growth-Related Genes, and Stress Response of Juvenile Red Sea Bream (Pagrus Major)

Author

Shadrack, Ronick Spenly, primary, Manabu, Ishikawa, additional, Koshio, Shunsuke, additional, Yokoyama, Saichiro, additional, Zhang, Yukun, additional, Mzengereza, Kumbukani, additional, El Basuini, Mohammed Fouad, additional, and Dawood, Mahmoud A. O., additional

Published
2022
Full Text
View/download PDF

9. Optimization of Soybean Meal Fermentation for Aqua-Feed with Bacillus subtilis natto Using the Response Surface Methodology.

Author

Yukun Zhang, Manabu Ishikawa, Shunsuke Koshio, Saichiro Yokoyama, Dossou, Serge, Weilong Wang, Xiaoxiao Zhang, Shadrack, Ronick Spenly, Kumbukani Mzengereza, Kehua Zhu, and Seok Seo

Subjects
SOYBEAN meal, RESPONSE surfaces (Statistics), BACILLUS subtilis, ESSENTIAL amino acids, SOLID-state fermentation, NUTRITIONAL value
Abstract

This study aimed to improve the nutritional value of soybean meal (SBM) by solid-state fermentation (SSF) using Bacillus subtilis natto (B. s. natto) to overcome the limitations of SBM usage in aquafeed. The response surface methodology (RSM) was employed to explore the relationships of fermentation conditions, such as temperature, time, water-substrate ratio, and layer thickness, on the degree of protein hydrolysis (DH) and the crude protein (CP) content. The optimum conditions for achieving the higher DH (15.96%) and CP (55.76%) were 43.82 °C, 62.32 h, 1.08 of water-substrate ratio, and a layer thickness of 2.02 cm. CP and DH in the fermented soybean meal (FSM) increased by 9.8% and 177.1%, respectively, and crude fiber decreased by 14.1% compared to SBM. The protein dispersibility index (PDI) decreased by 29.8%, while KOH protein solubility (KPS) was significantly increased by 17.4%. Flavonoids and total phenolic acid content in FSM were increased by 231.0% and 309.4%, respectively. Neutral protease activity (NPA) also reached a high level (1723.6 U g-1). Total essential amino acids (EAA) in FSM increased by 12.2%, higher than the 10.8% increase of total non-essential amino acids (NEAA), while the total free amino acids content was 12.76 times higher than that of SBM. Major anti-nutritional factors in SBM were significantly reduced during the process, and almost all SBM protein macromolecules were decomposed. Together with the cost-effectiveness of SSF, B. s. natto-fermented SBM products have great potential to improve the plant composition and replace high-cost ingredients in aquafeed, contributing to food security and environmental sustainability. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

10. Specific importance of low level dietary supplementation of Lypomyces starkeyi CB1807yeast strain in red sea bream (Pagrus major)

Author

Shadrack, Ronick Spenly, Manabu, Ishikawa, Yokoyama, Saichiro, Koshio, Shunsuke, Miguel, Vazquez Archdale, Yukun, Zhang, Mzengereza, Kumbukani, Seo, Seok, Dossou, Serge, and El Basuini, Mohammed F.

Abstract

Most probiotic yeast supplement in fish exhibit beneficial effect at ≤1% of the dietary proportion. This study aimed at evaluating the specific effects of Lypomyces starkeyi CB1807 yeast strain supplemented at ≤1% of dietary proportion on the performance of juvenile red sea bream (Pagrus major, 1.9 ± 0.04 g). Five diets were supplemented with yeast at graded levels of 0% (control diet ‘CD1’), 0.05% (D2), 0.1% (D3), 0.5% (D4), and 1.0% (D5). After 45 days of feeding trial, significant (P<0.05) improvement was detected on final body weight (FBW) and body weight gain (BWG) in fish fed D3 and D5 compared to control. Low values of total cholesterol (T-Cho) and aspartate aminotransferase (AST) were recorded in fish groups fed on D2, D4, and D5, respectively. Fish fed on D3, D4 and D5 diets showed high (P<0.05) values of serum, mucus and liver lysozyme compared to control. Fish fed on D5 showed high values of total immunoglobulin (Ig) compared to control. Fish fed on D2 showed strong correlation with biological antioxidant activity (BAP), superoxide dismutase (SOD) and catalase activity (CAT). The biological antioxidant potential (BAP) activity in fish fed on D2 was significantly higher compared to control (P<0.05). The reactive oxygen metabolites (d-ROM) were significantly lower in fish fed on D2 and D3 compared to CD1 (P<0.05). Peroxidase activity was improved significantly (P<0.05) in fish fed on D3, D4 and D5 compared to control. The tolerance ability (LT50) of fish fed on D5 against low salinity stress was significantly higher compared to control (P<0.05). It was concluded that dietary benefits of spent L. starkeyiyeast at ≤1% showed considerable improvement in antioxidant capacity in red sea bream, P. major.

Published
2022
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results