[Objective] The effects of wheat based diet supplemented with xylanase on blood sugar and total protein in serum of geese were studied. [ Method ] By using the randomized design of single factor, the 1-day-old healthy...[Objective] The effects of wheat based diet supplemented with xylanase on blood sugar and total protein in serum of geese were studied. [ Method ] By using the randomized design of single factor, the 1-day-old healthy goslings were divided into 6 groups and fed with corn based diet, wheat based diet and wheat based diet supplemented with xylanase at different concentrations respectively, the contents of blood sugar and total protein in serum were determined. [ Result] The wheat based diet supplemented with xylanase could increase the blood sugar and total protein in serum of geese and wheat based diet supplemented with 0.2% xylanase generated the best effect, which was higher than those of corn based diet group. As for the concentration of protein in serum, wheat based diet supplemented with 0.2% xylanase was significantly different from corn based diet and wheat based diet. [ Conclusion] The wheat based diet supplemented with xylanase could enhance geese production.展开更多
Non-aqueous phase enzymatic catalysis technology has been widely ap- plied in the area of food additives production. This paper reviewed the types of re- action medium of non-aqueous phase enzymatic catalysis reaction...Non-aqueous phase enzymatic catalysis technology has been widely ap- plied in the area of food additives production. This paper reviewed the types of re- action medium of non-aqueous phase enzymatic catalysis reaction, introduced the application of non-aqueous phase enzymatic catalysis technology in catalysis of L-ascorbic （isoascorbic） acid esters, short-chain acid esters, sugar esters, vitamin A esters, vi- tamin E esters, and other food additives, and finally predicted the prospects of non- aqueous phase enzymatic catalysis technology.展开更多
The objective of this study was to investigate the influence ofa phytogenic feed additive （PFA） to late-gestation （d 90） and lactation sows on their reproduction performance. Sixty Large White × Landrace prim...The objective of this study was to investigate the influence ofa phytogenic feed additive （PFA） to late-gestation （d 90） and lactation sows on their reproduction performance. Sixty Large White × Landrace primiparous sows were divided into four groups （fifteen sows per group）. The control group was fed with basal diet, the others were fed with basal diet supplemented with 0.02%, 0.04% and 0.06% PFA, respectively. Compared with the control, the sows in 0.04% PFA group had higher feed intake during lactation and higher litter weaning weight （P 〈 0.05）. At farrowing, glucose level in 0.04% PFA sows was higher than the control and sows in 0.02% PFA had the highest IgG content among the treatments （P 〈 0.05）. On day 7 of lactation, serum urea nitrogen contents were lower in response to PFA supplementation compared to the control （P 〈 0.05）. At the same time, sows fed the 0.06% PFA diet increased the lysozyme activity （P 〈 0.05）. The levels of milk lactose and IgG were increased in 0.02% and 0.04% PFA groups （P 〈 0.05）. In conclusion, feeding PFA improved sows and litter performance, serum metabolite concentrations, lgG level and lysozyme activity at postpartum and milk quality.展开更多
Aims Ozone(O_(3))pollution and nitrogen(N)deposition/fertilization often simultaneously affect plant growth.However,research of their interactive effects on leaf N metabolism is still scarce.We investigated their inte...Aims Ozone(O_(3))pollution and nitrogen(N)deposition/fertilization often simultaneously affect plant growth.However,research of their interactive effects on leaf N metabolism is still scarce.We investigated their interactive effects,aiming to better understand plant N metabolism processes and biogeochemical cycles under high 03 pollution and N deposition/fertilization.Methods Poplar saplings were exposed to two O_(3)levels(NF,non-filtered ambient air;NF60,NF+60 ppb O_(3))and four N treatments(NO,no N added;N50,NO+50 kg N ha^(-1)yr^(-1);N100,NO+100 kg N ha^(-1)yr^(-1);N200,NO+200 kg N ha^(-1)yr^(-1)in open-top chambers for 95 days.The indicators related to leaf N metabolism were analyzed,including the activities of N-metabolizing enzymes and the contents of total N,NO_(3)^(-)-N,NH_(4)^(+)-N,total amino acid(TAA)and total soluble protein(TSP)in the leaves.Important Findings NF60 stimulated the activities of nitrate reductase(NR)by 47.2%at August relative to NF,and stimulated glutamine synthetase(GS)by 57.3%when averaged across all N treatments and sampling times.In contrast,O_(3)did not significantly affect TSP and even reduced TAA content in August.Relative to NO,N200 significantly increased light-saturated rate of CO_(2)assimilation(Asat)by 24%,and increased total N content by 70.3%and 43.3%in August and September,respectively,while it reduced photosynthetic N-use efficiency by 26.1%in August.These results suggest that the increase in Asat and total N content are uncoupled,and that the surplus N is not used to optimize the capacity for carbon assimilation under high N treatment.Simultaneously,high N treatment significantly promoted leaf N metabolism by increasing NO_(3)^(-)-N contents,NH_(4)^(+)-N contents,TAA contents and the activities of NR and GS.There was no significant interaction between O_(3)and N for all variables.展开更多
基金the Science and Technology Key Projects of China (2004BA514A13-9)~~
文摘[Objective] The effects of wheat based diet supplemented with xylanase on blood sugar and total protein in serum of geese were studied. [ Method ] By using the randomized design of single factor, the 1-day-old healthy goslings were divided into 6 groups and fed with corn based diet, wheat based diet and wheat based diet supplemented with xylanase at different concentrations respectively, the contents of blood sugar and total protein in serum were determined. [ Result] The wheat based diet supplemented with xylanase could increase the blood sugar and total protein in serum of geese and wheat based diet supplemented with 0.2% xylanase generated the best effect, which was higher than those of corn based diet group. As for the concentration of protein in serum, wheat based diet supplemented with 0.2% xylanase was significantly different from corn based diet and wheat based diet. [ Conclusion] The wheat based diet supplemented with xylanase could enhance geese production.
基金Supported by Jiangxi Provincial Engineering & Technology Research Center for Food Additives Bio-ProductionScience & Technology Platform Construction Program of Jiangxi Province (2010DTZ01900)+1 种基金Priority Academic Program Development of Jiangsu Higher Education InstitutionsResearch Foundation for Advanced Talents of Jiangsu University (08JDG029)~~
文摘Non-aqueous phase enzymatic catalysis technology has been widely ap- plied in the area of food additives production. This paper reviewed the types of re- action medium of non-aqueous phase enzymatic catalysis reaction, introduced the application of non-aqueous phase enzymatic catalysis technology in catalysis of L-ascorbic （isoascorbic） acid esters, short-chain acid esters, sugar esters, vitamin A esters, vi- tamin E esters, and other food additives, and finally predicted the prospects of non- aqueous phase enzymatic catalysis technology.
文摘The objective of this study was to investigate the influence ofa phytogenic feed additive （PFA） to late-gestation （d 90） and lactation sows on their reproduction performance. Sixty Large White × Landrace primiparous sows were divided into four groups （fifteen sows per group）. The control group was fed with basal diet, the others were fed with basal diet supplemented with 0.02%, 0.04% and 0.06% PFA, respectively. Compared with the control, the sows in 0.04% PFA group had higher feed intake during lactation and higher litter weaning weight （P 〈 0.05）. At farrowing, glucose level in 0.04% PFA sows was higher than the control and sows in 0.02% PFA had the highest IgG content among the treatments （P 〈 0.05）. On day 7 of lactation, serum urea nitrogen contents were lower in response to PFA supplementation compared to the control （P 〈 0.05）. At the same time, sows fed the 0.06% PFA diet increased the lysozyme activity （P 〈 0.05）. The levels of milk lactose and IgG were increased in 0.02% and 0.04% PFA groups （P 〈 0.05）. In conclusion, feeding PFA improved sows and litter performance, serum metabolite concentrations, lgG level and lysozyme activity at postpartum and milk quality.
基金This study was funded by the National Natural Science Foundation of China(41771034 and 42061160479)Key Research Program of Frontier Sciences,CAS(QYZDB-SSW-DQC019)the Startup Foundation for Introducing Talent of Nanjing University of Information Science&Technology(003320).
文摘Aims Ozone(O_(3))pollution and nitrogen(N)deposition/fertilization often simultaneously affect plant growth.However,research of their interactive effects on leaf N metabolism is still scarce.We investigated their interactive effects,aiming to better understand plant N metabolism processes and biogeochemical cycles under high 03 pollution and N deposition/fertilization.Methods Poplar saplings were exposed to two O_(3)levels(NF,non-filtered ambient air;NF60,NF+60 ppb O_(3))and four N treatments(NO,no N added;N50,NO+50 kg N ha^(-1)yr^(-1);N100,NO+100 kg N ha^(-1)yr^(-1);N200,NO+200 kg N ha^(-1)yr^(-1)in open-top chambers for 95 days.The indicators related to leaf N metabolism were analyzed,including the activities of N-metabolizing enzymes and the contents of total N,NO_(3)^(-)-N,NH_(4)^(+)-N,total amino acid(TAA)and total soluble protein(TSP)in the leaves.Important Findings NF60 stimulated the activities of nitrate reductase(NR)by 47.2%at August relative to NF,and stimulated glutamine synthetase(GS)by 57.3%when averaged across all N treatments and sampling times.In contrast,O_(3)did not significantly affect TSP and even reduced TAA content in August.Relative to NO,N200 significantly increased light-saturated rate of CO_(2)assimilation(Asat)by 24%,and increased total N content by 70.3%and 43.3%in August and September,respectively,while it reduced photosynthetic N-use efficiency by 26.1%in August.These results suggest that the increase in Asat and total N content are uncoupled,and that the surplus N is not used to optimize the capacity for carbon assimilation under high N treatment.Simultaneously,high N treatment significantly promoted leaf N metabolism by increasing NO_(3)^(-)-N contents,NH_(4)^(+)-N contents,TAA contents and the activities of NR and GS.There was no significant interaction between O_(3)and N for all variables.
