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Zhang Chen,Zhang Chongyu,Du Meiyu,Wang Yunpeng,Zhang Guiguo,이윤경 아세아·태평양축산학회 2021 Animal Bioscience Vol.34 No.4
Objective: The effects of adding fermented feed to a pelleted total mixed ration (PTMR) on the growth performance of lambs remain unclear. The present study aimed to investigate the feed efficiency and productivity of lambs that were fed PTMR containing fermented soybean meal (FSM) or wheat bran (FWB). Methods: Sixty 90-d-old hybrid lambs were randomly allocated into 12 pens (5 lambs/pen) that were randomly assigned to 4 dietary treatments (3 pens/treatment) with PTMR (basal diet), 2% FSM, or Lactobacillus- or yeast-FWB (L-FWB or Y-FWB) addition in the basal diet. Results: The findings showed that lambs fed 2% FSM supplemented diet had enhanced (p<0.05) average daily gain (ADG) and carcass yield (p = 0.015), while they had a decreased (p = 0.006) feed conversion ratio compared to that of other three groups. Inclusion of FSM or FWB in PTMR improved (p<0.05) the nutrient digestibility, while it reduced the urea nitrogen content in serum compared to the PTMR group. Additionally, the decreased ratio of N excretion to ADG (p<0.01) was observed with FSM and L-FWB supplementation compared with the PTMR and Y-FWB groups. Conclusion: In conclusion, feeding the fermented feed-supplemented diet improved nutrient digestibility and growth performance, and 2% FSM-supplemented diet exhibited superior production-promoting efficiency to lambs. Objective: The effects of adding fermented feed to a pelleted total mixed ration (PTMR) on the growth performance of lambs remain unclear. The present study aimed to investigate the feed efficiency and productivity of lambs that were fed PTMR containing fermented soybean meal (FSM) or wheat bran (FWB).Methods: Sixty 90-d-old hybrid lambs were randomly allocated into 12 pens (5 lambs/pen) that were randomly assigned to 4 dietary treatments (3 pens/treatment) with PTMR (basal diet), 2% FSM, or <i>Lactobacillus</i>- or yeast-FWB (L-FWB or Y-FWB) addition in the basal diet.Results: The findings showed that lambs fed 2% FSM supplemented diet had enhanced (p<0.05) average daily gain (ADG) and carcass yield (p = 0.015), while they had a decreased (p = 0.006) feed conversion ratio compared to that of other three groups. Inclusion of FSM or FWB in PTMR improved (p<0.05) the nutrient digestibility, while it reduced the urea nitrogen content in serum compared to the PTMR group. Additionally, the decreased ratio of N excretion to ADG (p<0.01) was observed with FSM and L-FWB supplementation compared with the PTMR and Y-FWB groups.Conclusion: In conclusion, feeding the fermented feed-supplemented diet improved nutrient digestibility and growth performance, and 2% FSM-supplemented diet exhibited superior production-promoting efficiency to lambs.
Meiyu Zhang,Jaeyeong Choi,Da Wang,Lars Nilsson,Seungho Lee 한국분석과학회 2021 학술대회논문집 Vol.2021 No.11
Exudate gums are widely used as emulsifiers or thickening agents in the food industry. The performance of exudate gums is affected by their physicochemical properties such as molar mass (), molecular size, molecular conformation, protein content, et al. The high polydispersity, large and poor solubility of exudate gums bring challenges to their analysis. Either filtration or centrifugation can be used for preliminary separation of soluble and insoluble parts of the gum. However, their separation efficiency and their effect on the structural changes in gums are still unclear. In this research, asymmetrical flow field-flow fractionation coupled with multi-angle light scattering (AsFlFFF-MALS) was used to investigate the effect of the preparation method (filtration or centrifugation) on the size and the conformation of three types of gums (labelled ‘GT’, ‘GA’, and ‘GK’, respectively). The effect of removal of insoluble and large -populations on the emulsifying property of gums are also evaluated. Results showed that both filtration and centrifugation remove the co-eluted large populations, thus decrease the measured radius of gyration () of the gums. The removal of the large-sized populations and insoluble parts significantly reduced the viscosity of the gum dispersion and the emulsion prepared by the gums, resulting in an decreases in the stability of the emulsions.
Meiyu Zhang,Jaeyeong Choi,Da Wang,Lars Nilsson,Seungho Lee 한국분석과학회 2021 학술대회논문집 Vol.2021 No.11
Exudate gums are widely used as emulsifiers or thickening agents in the food industry. The performance of exudate gums is affected by their physicochemical properties such as molar mass (), molecular size, molecular conformation, protein content, et al. The high polydispersity, large and poor solubility of exudate gums bring challenges to their analysis. Either filtration or centrifugation can be used for preliminary separation of soluble and insoluble parts of the gum. However, their separation efficiency and their effect on the structural changes in gums are still unclear. In this research, asymmetrical flow field-flow fractionation coupled with multi-angle light scattering (AsFlFFF-MALS) was used to investigate the effect of the preparation method (filtration or centrifugation) on the size and the conformation of three types of gums (labelled ‘GT’, ‘GA’, and ‘GK’, respectively). The effect of removal of insoluble and large -populations on the emulsifying property of gums are also evaluated. Results showed that both filtration and centrifugation remove the co-eluted large populations, thus decrease the measured radius of gyration () of the gums. The removal of the large-sized populations and insoluble parts significantly reduced the viscosity of the gum dispersion and the emulsion prepared by the gums, resulting in an decreases in the stability of the emulsions.
Event-triggered Extended Dissipative Control for Networked Singular Systems
Meiyu Li,Jianwei Xia,Junsheng Zhao,Huasheng Zhang,Hao Shen 제어·로봇·시스템학회 2021 International Journal of Control, Automation, and Vol.19 No.1
In this paper, an event-triggered extended dissipative control problem for networked singular systems isinvestigated, where the extended dissipativity analysis unifies the H∞ performance, L2 −L∞ performance, passivity,(Q,S,R)-dissipativity in one framework. Under the event-triggered scheme, the closed-loop system is modeled asa time-delay system. Some sufficient conditions for extended dissipativity are developed and presented in terms oflinear matrix inequalities (LMIs). Then the design of the state feedback controller becomes a matter of solving aset of LMIs. Finally, a numerical example is provided to illustrate the effectiveness of the proposed method.