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Q. Liu - One of the best experts on this subject based on the ideXlab platform.
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effects of Isobutyrate supplementation in pre and post weaned dairy calves diet on growth performance rumen development blood metabolites and hormone secretion
Animal, 2017Co-Authors: C Wang, Q. Liu, Y.l. Zhang, C.x. Pei, S.l. Zhang, W.z. Yang, G Guo, W J Huo, Hongbao WangAbstract:Isobutyrate supplements could improve rumen development by increasing ruminal fermentation products, especially butyrate, and then promote the growth performance of calves. The objective of this study was to evaluate the effects of Isobutyrate supplementation on growth performance, rumen development, blood metabolites and hormone secretion in pre- and post-weaned dairy calves. In total, 56 Chinese Holstein male calves with 30 days of age and 72.9±1.43 kg of BW, blocked by days of age and BW, were assigned to four groups in a randomized block design. The treatments were as follows: control, low-Isobutyrate, moderate-Isobutyrate and high-Isobutyrate with 0, 0.03, 0.06 and 0.09 g Isobutyrate/kg BW per calf per day, respectively. Supplemental Isobutyrate was hand-mixed into milk of pre-weaned calves and the concentrate portion of post-weaned calves. The study consisted of 10 days of an adaptation period and a 50-day sampling period. Calves were weaned at 60 days of age. Seven calves were chosen from each treatment at random and slaughtered at 45 and 90 days of age. BW, dry matter (DM) intake and stomach weight were measured, samples of ruminal tissues and blood were determined. For pre- and post-weaned calves, DM intake and average daily gain increased linearly (P<0.05), but feed conversion ratio decreased linearly (P<0.05) with increasing Isobutyrate supplementation. Total stomach weight and the ratio of rumen weight to total stomach weight tended to increase (P=0.073) for pre-weaned calves and increased linearly (P=0.021) for post-weaned calves, whereas the ratio of abomasum weight to total stomach weight was not affected for pre-weaned calves and decreased linearly (P<0.05) for post-weaned calves with increasing Isobutyrate supplementation. Both length and width of rumen papillae tended to increase linearly for pre-weaned calves, but increased linearly (P<0.05) for post-weaned calves with increasing Isobutyrate supplementation. The relative expression of messenger RNA for growth hormone (GH) receptor and 3-hydroxy-3-methylglutaryl-CoA synthase 1 in rumen mucosa increased linearly (P<0.05) for pre- and post-weaned calves with increasing Isobutyrate supplementation. Blood concentrations of glucose, acetoacetate, β-hydroxybutyrate, GH and IGF-1 increased linearly (P<0.05) for pre- and post-weaned calves, whereas blood concentration of insulin decreased linearly with increasing Isobutyrate supplementation. The present results indicated that Isobutyrate promoted growth of calves by improving rumen development and its ketogenesis in a dose-dependent manner.
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Effects of Isobutyrate supplementation in pre- and post-weaned dairy calves diet on growth performance, rumen development, blood metabolites and hormone secretion.
Animal : an international journal of animal bioscience, 2016Co-Authors: Cong Wang, Q. Liu, Y.l. Zhang, C.x. Pei, S.l. Zhang, W.z. Yang, G Guo, W J Huo, Hongbao WangAbstract:Isobutyrate supplements could improve rumen development by increasing ruminal fermentation products, especially butyrate, and then promote the growth performance of calves. The objective of this study was to evaluate the effects of Isobutyrate supplementation on growth performance, rumen development, blood metabolites and hormone secretion in pre- and post-weaned dairy calves. In total, 56 Chinese Holstein male calves with 30 days of age and 72.9±1.43 kg of BW, blocked by days of age and BW, were assigned to four groups in a randomized block design. The treatments were as follows: control, low-Isobutyrate, moderate-Isobutyrate and high-Isobutyrate with 0, 0.03, 0.06 and 0.09 g Isobutyrate/kg BW per calf per day, respectively. Supplemental Isobutyrate was hand-mixed into milk of pre-weaned calves and the concentrate portion of post-weaned calves. The study consisted of 10 days of an adaptation period and a 50-day sampling period. Calves were weaned at 60 days of age. Seven calves were chosen from each treatment at random and slaughtered at 45 and 90 days of age. BW, dry matter (DM) intake and stomach weight were measured, samples of ruminal tissues and blood were determined. For pre- and post-weaned calves, DM intake and average daily gain increased linearly (P
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Effects of Isobutyrate supplementation on ruminal microflora, rumen enzyme activities and methane emissions in Simmental steers.
Journal of animal physiology and animal nutrition, 2014Co-Authors: Cong Wang, Q. Liu, Y.l. Zhang, C.x. Pei, S.l. Zhang, Wang Yongxin, W.z. Yang, Y. S. Bai, Z. G. Shi, X. N. LiuAbstract:Summary The objective of this study was to evaluate the effects of Isobutyrate supplementation on rumen microflora, enzyme activities and methane emissions in Simmental steers consuming a corn stover-based diet. Eight ruminally cannulated Simmental steers were used in a replicated 4 × 4 Latin square experiment. The treatments were control (without Isobutyrate), low Isobutyrate (LIB), moderate Isobutyrate (MIB) and high Isobutyrate (HIB) with 8.4, 16.8 and 25.2 g Isobutyrate per steer per day respectively. Isobutyrate was hand-mixed into the concentrate portion. Diet consisted of 60% corn stover and 40% concentrate [dry matter (DM) basis]. Dry matter intake (averaged 9 kg/day) was restricted to a maximum of 90% of ad libitum intake. Population of total bacteria, cellulolytic bacteria and anaerobic fungi were linearly increased, whereas that of protozoa and total methanogens was linearly reduced with increasing Isobutyrate supplementation. Real-time PCR quantification of population of Ruminococcus albus, Ruminococcus flavefaciens, Butyrivibrio fibrisolvens and Fibrobacter succinogenes was linearly increased with increasing Isobutyrate supplementation. Activities of carboxymethyl cellulase, xylanase and β-glucosidase were linearly increased, whereas that of protease was linearly reduced. Methane production was linearly decreased with increasing Isobutyrate supplementation. Effective degradabilities of cellulose and hemicellulose of corn stover were linearly increased, whereas that of crude protein in diet was linearly decreased with increasing Isobutyrate supplementation. The present results indicate that Isobutyrate supplemented improved microflora, rumen enzyme activities and methane emissions in steers. It was suggested that the Isobutyrate stimulated the digestive micro-organisms or enzymes in a dose-dependent manner. In the experimental conditions of this trial, the optimum Isobutyrate dose was approximately 16.8 g Isobutyrate per steer per day.
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effects of Isobutyrate on rumen fermentation lactation performance and plasma characteristics in dairy cows
Animal Feed Science and Technology, 2009Co-Authors: Q. Liu, W.z. Yang, C Wang, B Zhang, X M Yang, P Zhang, K H Dong, Y X HuangAbstract:The objective of this study was to evaluate effects of Isobutyrate supplementation on rumen fermentation, lactation performance and plasma characteristics of dairy cows. Twenty multiparous second filial generation (F2) cows of a cross between Chinese Jinnan Yellow and Holstein cows at 148 ± 4.5 days in milk and 22.3 ± 0.81 kg milk production were used in a replicated 4 × 4 Latin square experiment. The treatments were: control (without Isobutyrate), low (LIB), medium (MIB) and high (HIB) Isobutyrate supplementation of 20, 40 and 60 g per cow per day, respectively. Experimental periods were 30 days with 15 d of adaptation and 15 d of data collection. Dry matter (DM) intake was not affected by increasing Isobutyrate supplementation, but milk yields were highest for the 40 g/d Isobutyrate supplementation level, where proportion of milk fat, true protein and lactose were minimized. Ruminal pH (6.38–6.24) and ammonia N (13.8–11.1 mg/100 ml) were linearly (P<0.01) decreased, whereas total VFA concentration (124–131 mM) increased at a decreasing rate with increasing Isobutyrate supplementation. The ratio of acetate to propionate increased linearly (P<0.01) from 2.77 to 4.43 as Isobutyrate supplementation increased due to the increase in acetate production and decrease in propionate production. Digestibilities of OM in
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Effects of Isobutyrate on rumen fermentation, lactation performance and plasma characteristics in dairy cows
Animal Feed Science and Technology, 2009Co-Authors: Q. Liu, Cong Wang, W.z. Yang, B Zhang, X M Yang, P Zhang, K H Dong, Y X HuangAbstract:The objective of this study was to evaluate effects of Isobutyrate supplementation on rumen fermentation, lactation performance and plasma characteristics of dairy cows. Twenty multiparous second filial generation (F2) cows of a cross between Chinese Jinnan Yellow and Holstein cows at 148 ± 4.5 days in milk and 22.3 ± 0.81 kg milk production were used in a replicated 4 × 4 Latin square experiment. The treatments were: control (without Isobutyrate), low (LIB), medium (MIB) and high (HIB) Isobutyrate supplementation of 20, 40 and 60 g per cow per day, respectively. Experimental periods were 30 days with 15 d of adaptation and 15 d of data collection. Dry matter (DM) intake was not affected by increasing Isobutyrate supplementation, but milk yields were highest for the 40 g/d Isobutyrate supplementation level, where proportion of milk fat, true protein and lactose were minimized. Ruminal pH (6.38–6.24) and ammonia N (13.8–11.1 mg/100 ml) were linearly (P
W.z. Yang - One of the best experts on this subject based on the ideXlab platform.
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effects of Isobutyrate supplementation in pre and post weaned dairy calves diet on growth performance rumen development blood metabolites and hormone secretion
Animal, 2017Co-Authors: C Wang, Q. Liu, Y.l. Zhang, C.x. Pei, S.l. Zhang, W.z. Yang, G Guo, W J Huo, Hongbao WangAbstract:Isobutyrate supplements could improve rumen development by increasing ruminal fermentation products, especially butyrate, and then promote the growth performance of calves. The objective of this study was to evaluate the effects of Isobutyrate supplementation on growth performance, rumen development, blood metabolites and hormone secretion in pre- and post-weaned dairy calves. In total, 56 Chinese Holstein male calves with 30 days of age and 72.9±1.43 kg of BW, blocked by days of age and BW, were assigned to four groups in a randomized block design. The treatments were as follows: control, low-Isobutyrate, moderate-Isobutyrate and high-Isobutyrate with 0, 0.03, 0.06 and 0.09 g Isobutyrate/kg BW per calf per day, respectively. Supplemental Isobutyrate was hand-mixed into milk of pre-weaned calves and the concentrate portion of post-weaned calves. The study consisted of 10 days of an adaptation period and a 50-day sampling period. Calves were weaned at 60 days of age. Seven calves were chosen from each treatment at random and slaughtered at 45 and 90 days of age. BW, dry matter (DM) intake and stomach weight were measured, samples of ruminal tissues and blood were determined. For pre- and post-weaned calves, DM intake and average daily gain increased linearly (P<0.05), but feed conversion ratio decreased linearly (P<0.05) with increasing Isobutyrate supplementation. Total stomach weight and the ratio of rumen weight to total stomach weight tended to increase (P=0.073) for pre-weaned calves and increased linearly (P=0.021) for post-weaned calves, whereas the ratio of abomasum weight to total stomach weight was not affected for pre-weaned calves and decreased linearly (P<0.05) for post-weaned calves with increasing Isobutyrate supplementation. Both length and width of rumen papillae tended to increase linearly for pre-weaned calves, but increased linearly (P<0.05) for post-weaned calves with increasing Isobutyrate supplementation. The relative expression of messenger RNA for growth hormone (GH) receptor and 3-hydroxy-3-methylglutaryl-CoA synthase 1 in rumen mucosa increased linearly (P<0.05) for pre- and post-weaned calves with increasing Isobutyrate supplementation. Blood concentrations of glucose, acetoacetate, β-hydroxybutyrate, GH and IGF-1 increased linearly (P<0.05) for pre- and post-weaned calves, whereas blood concentration of insulin decreased linearly with increasing Isobutyrate supplementation. The present results indicated that Isobutyrate promoted growth of calves by improving rumen development and its ketogenesis in a dose-dependent manner.
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Effects of Isobutyrate supplementation in pre- and post-weaned dairy calves diet on growth performance, rumen development, blood metabolites and hormone secretion.
Animal : an international journal of animal bioscience, 2016Co-Authors: Cong Wang, Q. Liu, Y.l. Zhang, C.x. Pei, S.l. Zhang, W.z. Yang, G Guo, W J Huo, Hongbao WangAbstract:Isobutyrate supplements could improve rumen development by increasing ruminal fermentation products, especially butyrate, and then promote the growth performance of calves. The objective of this study was to evaluate the effects of Isobutyrate supplementation on growth performance, rumen development, blood metabolites and hormone secretion in pre- and post-weaned dairy calves. In total, 56 Chinese Holstein male calves with 30 days of age and 72.9±1.43 kg of BW, blocked by days of age and BW, were assigned to four groups in a randomized block design. The treatments were as follows: control, low-Isobutyrate, moderate-Isobutyrate and high-Isobutyrate with 0, 0.03, 0.06 and 0.09 g Isobutyrate/kg BW per calf per day, respectively. Supplemental Isobutyrate was hand-mixed into milk of pre-weaned calves and the concentrate portion of post-weaned calves. The study consisted of 10 days of an adaptation period and a 50-day sampling period. Calves were weaned at 60 days of age. Seven calves were chosen from each treatment at random and slaughtered at 45 and 90 days of age. BW, dry matter (DM) intake and stomach weight were measured, samples of ruminal tissues and blood were determined. For pre- and post-weaned calves, DM intake and average daily gain increased linearly (P
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Effects of Isobutyrate supplementation on ruminal microflora, rumen enzyme activities and methane emissions in Simmental steers.
Journal of animal physiology and animal nutrition, 2014Co-Authors: Cong Wang, Q. Liu, Y.l. Zhang, C.x. Pei, S.l. Zhang, Wang Yongxin, W.z. Yang, Y. S. Bai, Z. G. Shi, X. N. LiuAbstract:Summary The objective of this study was to evaluate the effects of Isobutyrate supplementation on rumen microflora, enzyme activities and methane emissions in Simmental steers consuming a corn stover-based diet. Eight ruminally cannulated Simmental steers were used in a replicated 4 × 4 Latin square experiment. The treatments were control (without Isobutyrate), low Isobutyrate (LIB), moderate Isobutyrate (MIB) and high Isobutyrate (HIB) with 8.4, 16.8 and 25.2 g Isobutyrate per steer per day respectively. Isobutyrate was hand-mixed into the concentrate portion. Diet consisted of 60% corn stover and 40% concentrate [dry matter (DM) basis]. Dry matter intake (averaged 9 kg/day) was restricted to a maximum of 90% of ad libitum intake. Population of total bacteria, cellulolytic bacteria and anaerobic fungi were linearly increased, whereas that of protozoa and total methanogens was linearly reduced with increasing Isobutyrate supplementation. Real-time PCR quantification of population of Ruminococcus albus, Ruminococcus flavefaciens, Butyrivibrio fibrisolvens and Fibrobacter succinogenes was linearly increased with increasing Isobutyrate supplementation. Activities of carboxymethyl cellulase, xylanase and β-glucosidase were linearly increased, whereas that of protease was linearly reduced. Methane production was linearly decreased with increasing Isobutyrate supplementation. Effective degradabilities of cellulose and hemicellulose of corn stover were linearly increased, whereas that of crude protein in diet was linearly decreased with increasing Isobutyrate supplementation. The present results indicate that Isobutyrate supplemented improved microflora, rumen enzyme activities and methane emissions in steers. It was suggested that the Isobutyrate stimulated the digestive micro-organisms or enzymes in a dose-dependent manner. In the experimental conditions of this trial, the optimum Isobutyrate dose was approximately 16.8 g Isobutyrate per steer per day.
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effects of Isobutyrate on rumen fermentation lactation performance and plasma characteristics in dairy cows
Animal Feed Science and Technology, 2009Co-Authors: Q. Liu, W.z. Yang, C Wang, B Zhang, X M Yang, P Zhang, K H Dong, Y X HuangAbstract:The objective of this study was to evaluate effects of Isobutyrate supplementation on rumen fermentation, lactation performance and plasma characteristics of dairy cows. Twenty multiparous second filial generation (F2) cows of a cross between Chinese Jinnan Yellow and Holstein cows at 148 ± 4.5 days in milk and 22.3 ± 0.81 kg milk production were used in a replicated 4 × 4 Latin square experiment. The treatments were: control (without Isobutyrate), low (LIB), medium (MIB) and high (HIB) Isobutyrate supplementation of 20, 40 and 60 g per cow per day, respectively. Experimental periods were 30 days with 15 d of adaptation and 15 d of data collection. Dry matter (DM) intake was not affected by increasing Isobutyrate supplementation, but milk yields were highest for the 40 g/d Isobutyrate supplementation level, where proportion of milk fat, true protein and lactose were minimized. Ruminal pH (6.38–6.24) and ammonia N (13.8–11.1 mg/100 ml) were linearly (P<0.01) decreased, whereas total VFA concentration (124–131 mM) increased at a decreasing rate with increasing Isobutyrate supplementation. The ratio of acetate to propionate increased linearly (P<0.01) from 2.77 to 4.43 as Isobutyrate supplementation increased due to the increase in acetate production and decrease in propionate production. Digestibilities of OM in
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Effects of Isobutyrate on rumen fermentation, lactation performance and plasma characteristics in dairy cows
Animal Feed Science and Technology, 2009Co-Authors: Q. Liu, Cong Wang, W.z. Yang, B Zhang, X M Yang, P Zhang, K H Dong, Y X HuangAbstract:The objective of this study was to evaluate effects of Isobutyrate supplementation on rumen fermentation, lactation performance and plasma characteristics of dairy cows. Twenty multiparous second filial generation (F2) cows of a cross between Chinese Jinnan Yellow and Holstein cows at 148 ± 4.5 days in milk and 22.3 ± 0.81 kg milk production were used in a replicated 4 × 4 Latin square experiment. The treatments were: control (without Isobutyrate), low (LIB), medium (MIB) and high (HIB) Isobutyrate supplementation of 20, 40 and 60 g per cow per day, respectively. Experimental periods were 30 days with 15 d of adaptation and 15 d of data collection. Dry matter (DM) intake was not affected by increasing Isobutyrate supplementation, but milk yields were highest for the 40 g/d Isobutyrate supplementation level, where proportion of milk fat, true protein and lactose were minimized. Ruminal pH (6.38–6.24) and ammonia N (13.8–11.1 mg/100 ml) were linearly (P
Ange Bighelli - One of the best experts on this subject based on the ideXlab platform.
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thymyl esters derivatives and a new natural product modhephanone from pulicaria mauritanica coss asteraceae root oil
Flavour and Fragrance Journal, 2015Co-Authors: Tao Xu, Mohammed Gherib, Fewzia Atikbekkara, Chahrazed Bekhechi, Félix Tomi, Joseph Casanova, Hervé Casabianca, Ange BighelliAbstract:Root essential oil of Pulicaria mauritanica Coss. (Asteraceae) collected from western Algeria was analysed using a combination of chromatographic (CC, GC/FID, GC(RI)] and spectroscopic [GC–MS, 13C-NMR] techniques. Thirty-eight compounds accounting for 90.4% of the whole composition were identified. The oil composition was dominated by thymyl derivatives (2,5-dimethoxy-p-cymene (37.2%), 6-methoxythymyl Isobutyrate (14.2%), 10-isobutyryloxy-8,9-dehydrothymyl Isobutyrate (4.8%) and thymyl Isobutyrate (3.1%)), as well as by neryl Isobutyrate (11.1%). A new natural compound was isolated and the structure was elucidated as 1S,2S,5S,8S-modhephan-3-one (relative stereochemistry). Copyright © 2014 John Wiley & Sons, Ltd.
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Thymyl esters derivatives and a new natural product modhephanone from Pulicaria mauritanica Coss . (Asteraceae) root oil
Flavour and Fragrance Journal, 2015Co-Authors: Mohammed Gherib, Chahrazed Bekhechi, Félix Tomi, Joseph Casanova, Hervé Casabianca, Fewzia Atik-bekkara, Ange BighelliAbstract:Root essential oil of Pulicaria mauritanica Coss. (Asteraceae) collected from western Algeria was analysed using a combination of chromatographic (CC, GC/FID, GC(RI)] and spectroscopic [GC–MS, 13C-NMR] techniques. Thirty-eight compounds accounting for 90.4% of the whole composition were identified. The oil composition was dominated by thymyl derivatives (2,5-dimethoxy-p-cymene (37.2%), 6-methoxythymyl Isobutyrate (14.2%), 10-isobutyryloxy-8,9-dehydrothymyl Isobutyrate (4.8%) and thymyl Isobutyrate (3.1%)), as well as by neryl Isobutyrate (11.1%). A new natural compound was isolated and the structure was elucidated as 1S,2S,5S,8S-modhephan-3-one (relative stereochemistry)
Cong Wang - One of the best experts on this subject based on the ideXlab platform.
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Effects of Isobutyrate supplementation in pre- and post-weaned dairy calves diet on growth performance, rumen development, blood metabolites and hormone secretion.
Animal : an international journal of animal bioscience, 2016Co-Authors: Cong Wang, Q. Liu, Y.l. Zhang, C.x. Pei, S.l. Zhang, W.z. Yang, G Guo, W J Huo, Hongbao WangAbstract:Isobutyrate supplements could improve rumen development by increasing ruminal fermentation products, especially butyrate, and then promote the growth performance of calves. The objective of this study was to evaluate the effects of Isobutyrate supplementation on growth performance, rumen development, blood metabolites and hormone secretion in pre- and post-weaned dairy calves. In total, 56 Chinese Holstein male calves with 30 days of age and 72.9±1.43 kg of BW, blocked by days of age and BW, were assigned to four groups in a randomized block design. The treatments were as follows: control, low-Isobutyrate, moderate-Isobutyrate and high-Isobutyrate with 0, 0.03, 0.06 and 0.09 g Isobutyrate/kg BW per calf per day, respectively. Supplemental Isobutyrate was hand-mixed into milk of pre-weaned calves and the concentrate portion of post-weaned calves. The study consisted of 10 days of an adaptation period and a 50-day sampling period. Calves were weaned at 60 days of age. Seven calves were chosen from each treatment at random and slaughtered at 45 and 90 days of age. BW, dry matter (DM) intake and stomach weight were measured, samples of ruminal tissues and blood were determined. For pre- and post-weaned calves, DM intake and average daily gain increased linearly (P
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Effects of Isobutyrate supplementation on ruminal microflora, rumen enzyme activities and methane emissions in Simmental steers.
Journal of animal physiology and animal nutrition, 2014Co-Authors: Cong Wang, Q. Liu, Y.l. Zhang, C.x. Pei, S.l. Zhang, Wang Yongxin, W.z. Yang, Y. S. Bai, Z. G. Shi, X. N. LiuAbstract:Summary The objective of this study was to evaluate the effects of Isobutyrate supplementation on rumen microflora, enzyme activities and methane emissions in Simmental steers consuming a corn stover-based diet. Eight ruminally cannulated Simmental steers were used in a replicated 4 × 4 Latin square experiment. The treatments were control (without Isobutyrate), low Isobutyrate (LIB), moderate Isobutyrate (MIB) and high Isobutyrate (HIB) with 8.4, 16.8 and 25.2 g Isobutyrate per steer per day respectively. Isobutyrate was hand-mixed into the concentrate portion. Diet consisted of 60% corn stover and 40% concentrate [dry matter (DM) basis]. Dry matter intake (averaged 9 kg/day) was restricted to a maximum of 90% of ad libitum intake. Population of total bacteria, cellulolytic bacteria and anaerobic fungi were linearly increased, whereas that of protozoa and total methanogens was linearly reduced with increasing Isobutyrate supplementation. Real-time PCR quantification of population of Ruminococcus albus, Ruminococcus flavefaciens, Butyrivibrio fibrisolvens and Fibrobacter succinogenes was linearly increased with increasing Isobutyrate supplementation. Activities of carboxymethyl cellulase, xylanase and β-glucosidase were linearly increased, whereas that of protease was linearly reduced. Methane production was linearly decreased with increasing Isobutyrate supplementation. Effective degradabilities of cellulose and hemicellulose of corn stover were linearly increased, whereas that of crude protein in diet was linearly decreased with increasing Isobutyrate supplementation. The present results indicate that Isobutyrate supplemented improved microflora, rumen enzyme activities and methane emissions in steers. It was suggested that the Isobutyrate stimulated the digestive micro-organisms or enzymes in a dose-dependent manner. In the experimental conditions of this trial, the optimum Isobutyrate dose was approximately 16.8 g Isobutyrate per steer per day.
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Effects of Isobutyrate on rumen fermentation, lactation performance and plasma characteristics in dairy cows
Animal Feed Science and Technology, 2009Co-Authors: Q. Liu, Cong Wang, W.z. Yang, B Zhang, X M Yang, P Zhang, K H Dong, Y X HuangAbstract:The objective of this study was to evaluate effects of Isobutyrate supplementation on rumen fermentation, lactation performance and plasma characteristics of dairy cows. Twenty multiparous second filial generation (F2) cows of a cross between Chinese Jinnan Yellow and Holstein cows at 148 ± 4.5 days in milk and 22.3 ± 0.81 kg milk production were used in a replicated 4 × 4 Latin square experiment. The treatments were: control (without Isobutyrate), low (LIB), medium (MIB) and high (HIB) Isobutyrate supplementation of 20, 40 and 60 g per cow per day, respectively. Experimental periods were 30 days with 15 d of adaptation and 15 d of data collection. Dry matter (DM) intake was not affected by increasing Isobutyrate supplementation, but milk yields were highest for the 40 g/d Isobutyrate supplementation level, where proportion of milk fat, true protein and lactose were minimized. Ruminal pH (6.38–6.24) and ammonia N (13.8–11.1 mg/100 ml) were linearly (P
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Effects of Isobutyrate on rumen fermentation, urinary excretion of purine derivatives and digestibility in steers.
Archives of animal nutrition, 2008Co-Authors: Q. Liu, Cong Wang, Yingxiang Huang, Kuanhu Dong, H. Wang, Wenzhu YangAbstract:The objective of this study was to evaluate the effects of Isobutyrate supplementations on rumen fermentation, urinary excretion of purine derivatives and feed digestibility in steers. Eight ruminally cannulated Simmental steers were used in a replicated 4 × 4 Latin square experiment. On DM basis, diet consisted of 60% corn stover and 40% concentrate. Dry matter intake (averaged 9 kg/d) was restricted to 90% of ad libitum intake. The four treatment groups received a daily dose of 0 (control), 8.4, 16.8 or 25.2 g Isobutyrate per steer. With increasing Isobutyrate supplementation total VFA concentration (range 64.2–74.0 mM) was significantly enhanced. The ratio of acetate to propionate (range 2.72–4.25) was also significantly increased due to the increase in actate production and decrease in propionate production. With increasing Isobutyrate supplementation the ruminal degradation of NDF from corn stover was improved but the CP degradability of soybean meal was decreased. Furthermore, the Isobutyrate supple...
Mohammed Gherib - One of the best experts on this subject based on the ideXlab platform.
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thymyl esters derivatives and a new natural product modhephanone from pulicaria mauritanica coss asteraceae root oil
Flavour and Fragrance Journal, 2015Co-Authors: Tao Xu, Mohammed Gherib, Fewzia Atikbekkara, Chahrazed Bekhechi, Félix Tomi, Joseph Casanova, Hervé Casabianca, Ange BighelliAbstract:Root essential oil of Pulicaria mauritanica Coss. (Asteraceae) collected from western Algeria was analysed using a combination of chromatographic (CC, GC/FID, GC(RI)] and spectroscopic [GC–MS, 13C-NMR] techniques. Thirty-eight compounds accounting for 90.4% of the whole composition were identified. The oil composition was dominated by thymyl derivatives (2,5-dimethoxy-p-cymene (37.2%), 6-methoxythymyl Isobutyrate (14.2%), 10-isobutyryloxy-8,9-dehydrothymyl Isobutyrate (4.8%) and thymyl Isobutyrate (3.1%)), as well as by neryl Isobutyrate (11.1%). A new natural compound was isolated and the structure was elucidated as 1S,2S,5S,8S-modhephan-3-one (relative stereochemistry). Copyright © 2014 John Wiley & Sons, Ltd.
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Thymyl esters derivatives and a new natural product modhephanone from Pulicaria mauritanica Coss . (Asteraceae) root oil
Flavour and Fragrance Journal, 2015Co-Authors: Mohammed Gherib, Chahrazed Bekhechi, Félix Tomi, Joseph Casanova, Hervé Casabianca, Fewzia Atik-bekkara, Ange BighelliAbstract:Root essential oil of Pulicaria mauritanica Coss. (Asteraceae) collected from western Algeria was analysed using a combination of chromatographic (CC, GC/FID, GC(RI)] and spectroscopic [GC–MS, 13C-NMR] techniques. Thirty-eight compounds accounting for 90.4% of the whole composition were identified. The oil composition was dominated by thymyl derivatives (2,5-dimethoxy-p-cymene (37.2%), 6-methoxythymyl Isobutyrate (14.2%), 10-isobutyryloxy-8,9-dehydrothymyl Isobutyrate (4.8%) and thymyl Isobutyrate (3.1%)), as well as by neryl Isobutyrate (11.1%). A new natural compound was isolated and the structure was elucidated as 1S,2S,5S,8S-modhephan-3-one (relative stereochemistry)
