|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Optimal dietary copper requirements and relative bioavailability for weanling pigs fed either copper proteinate or tribasic copper chloride显示文摘Background: The objective of this study was to determine the effects of supplementing Cu on growth performance, Cu metabolism and Cu-related enzyme activities of weanling pigs fed diets with two different Cu sources, and to estimate optimal Cu requirements and relative bioavailability from these two sources for pigs.Methods: Weanling pigs were allocated to 14 treatments arranged factorially, including 6 added Cu levels(5, 10,20, 40, 80, 160 mg/kg), and 2 mineral sources(tribasic Cu chloride, TBCC and copper proteinate, Cu Pro), as well as one negative control(0 mg/kg added Cu level) and one maximum allowed level treatment(200 mg/kg TBCC) for the entire 38-d experiment. Growth performance, mineral status and enzyme activities were measured at the end of this study.Results: Increasing levels of Cu showed linear and quadratic responses(P < 0.01) for final BW, ADG and FCR regardless of the sources. Supplementation with TBCC(> 80 mg/kg) and Cu Pro(> 20 mg/kg) significantly decreased(P < 0.05) diarrhea incidence of weanling pigs. There were linear and quadratic increases(P < 0.01) in bile, hepatic,and intestinal Cu concentrations, fecal Cu contents, and plasma enzyme activities(alkaline phosphatase,ceruloplasmin, Cu, Zn-Superoxide dismutase(Cu/Zn SOD), and glutathione peroxidase), whereas plasma malondialdehyde decreased(P < 0.01) linearly and quadratically as dietary Cu level increased. Similarly, pigs fed Cu Pro absorbed and retained more Cu and excreted less Cu than those fed TBCC when supplemented 80 mg/kg and above. Optimal dietary Cu requirements for pigs from 28 to 66 d of age estimated based on fitted broken-line models(P < 0.05) of bile Cu, plasma Cu/Zn SOD and growth performance were 93–140 mg/kg from TBCC, and 63–98 mg/kg from Cu Pro accordingly. According to slope ratios from multiple linear regression, the bioavailability value of Cu Pro relative to TBCC(100%) was 156–263%(P < 0.01).Conclusion: The findings indicated that Cu recommendation from current NRC(5–6 mg/kg) was not sufficient to meet the high requirement of weanling pigs. Cu from Cu Pro was significantly more bioavailable to weanling pigs than TBCC in stimulating growth and enzyme activities, decreasing diarrhea frequency and fecal Cu contents to the environment. | Gang Lin Yang Guo Bing Liu Ruiguo Wang Xiaoou Su Dongyou Yu Pingli He | 2020 | Journal of Animal Science and Biotechnology2020，11，4： | 5 |
| 2 | Effects of Bacillus preparations on immunity and antioxidant activities in grass carp ( Ctenopharyngodon idellus )显示文摘 | Li Weifen Zhang Xiaoping Song Wenhui Deng Bin Liang Quan Fu Luoqin Zheng Jiajia Wang yue Yu Dongyou | 2012 | Fish Physiology and Biochemistry2012，，6： | 1 |
| 3 | Use of PCR primers derived from a putative transcriptional regulator gene for species-specific determination of Listeria monocytogenes显示文摘 | Dongyou Liu A.Jerald Ainsworth Frank W. Austin Mark L. Lawrence | 2003 | International Journal of Food Microbiology2003，，3： | 1 |
| 4 | PCR amplification of a species-specific putative transcriptional regulator gene reveals the identity of Enterococcus faecalis 显示文摘 | DONGYOU L CHINLING W EDWIN J S | 2005 | Res Microbiol2005，156，： | 1 |
| 5 | Toward an improved laboratory definition of Listeria monocytogenes virulence显示文摘 | Dongyou L Mark L L Jerald A A | 2007 | Int J Food Microbiol2007，118，2： | 1 |
| 6 | Toward an improved laboratory definition of Listeria monocytogenes virulence显示文摘 | LIU Dongyou LAWRENCE M L AINSWORTH A J | 2007 | International Journal of Food Microbiology2007，118，： | 1 |
| 7 | Characterization of virulent and avirulent Listeria monocytogenes strains by PCR amplification of putative transcriptional regulator and internalin genes显示文摘 | LIU Dongyou AINSWORTH A J AUSTIN F W | 2003 | J Med Microbiol2003，52，12： | 1 |
| 8 | Listeria monocytogenes: comparative interpretation of mouse virulence assay显示文摘 | L1U Dongyou | 2004 | FEMS Micro-Biology Letters2004，233，1： | 1 |
| 9 | Rapid identification of Streptococcus pyogenes with PCR primers from a putative transcriptional regulator gene显示文摘 | LIU DONGYOU HOLLINGSHEAD SUSAN SWIATLO EDWIN | | 0，，： | 1 |
| 10 | Low - melting - point biodiesel derived from corn oil via urea complexation 显示文摘 | BI Yanlan DING Dongyou WANG Donghai | 2010 | Bioresour Technol2010，101，4： | 1 |
| 11 | Unprecedented snow darkening and melting in New Zealand due to 2019–2020 Australian wildfires显示文摘Wildfire events have recently shown a rapid increase in frequency and scale due to the warmer present-day climate;however,their potential effects on the cryosphere are difficult to assess.Catastrophic wildfires in Australia during 2019–2020 emitted large amounts of light-absorbing particles(LAPs)to the atmosphere.Satellite observations indicate that these LAPs caused unprecedented snow-darkening of glaciers in New Zealand through long-range transport and deposition,with their effects lasting for up to three months in January–March 2020,influencing>90%of total glacier/snow and leading to a mean broadband snow-reflectance reduction of 0.08±0.03.This snow darkening accelerated snowmelt by~0.41±0.2 cm day–1 during the southern summer,equivalent to that caused by a~1.8°C increase in air temperature.This indicates the significant impact of the 2019–2020 Australian wildfires on the hydrologic cycle in New Zealand,exceeding that of the local climate warming of~1.5°C since the preindustrial period.Wildfire-induced snow darkening is not limited to New Zealand.Future projections of wildfire incidence indicate widespread effects of snow darkening on the global cryosphere. | Pu Wei Cui Jiecan Wu Dongyou Shi Tenglong Chen Yang Xing Yuxuan Zhou Yue Wang Xin | 2021 | Fundamental Research2021，1，3： | 0 |
| 12 | Dietary supplementation of Macleaya cordata extract and Bacillus in combination improve laying performance by regulating reproductive hormones,intestinal microbiota and barrier function of laying hens显示文摘Background:This study aimed to investigate whether the combination of Macleaya cordata extract(MCE)and Bacil-lus could improve the laying performance and health of laying hens better.Methods:A total of 36029-week-old Jingbai laying hens were randomly divided into 4 treatments:control group(basal diet),MCE group(basal diet+MCE),Probiotics Bacillus Compound(PBC)group(basal diet+compound Bacil-lus),MCE+PBC group(basal diet+MCE+compound Bacillus).The feeding experiment lasted for 42 d.Results:The results showed that the laying rate and the average daily egg mass in the MCE+PBC group were significantly higher than those in the control group(P<0.05)and better than the MCE and PBC group.Combina-tion of MCE and Bacillus significantly increased the content of follicle-stimulating hormone(FSH)in the serum and up-regulated the expression of related hormone receptor gene(estrogen receptor-β,FSHR and luteinizing hormone/choriogonadotropin receptor)in the ovary of laying hens(P<0.05).In the MCE+PBC group,the mRNA expressions of zonula occluden-1,Occludin and mucin-2 in jejunum was increased and the intestinal epithelial barrier detected by transmission electron microscopy was enhanced compared with the control group(P<0.05).In addition,compared with the control group,combination of MCE and Bacillus significantly increased the total antioxidant capacity and catalase activity(P<0.05),and down-regulated the mRNA expressions of inflammation-related genes(interleukin-1βand tumor necrosis factor-α)as well as apoptosis-related genes(Caspase 3,Caspase 8 and P53)(P<0.05).The concen-tration of acetic acid and butyric acid in the cecum content of laying hens in the MCE+PBC group was significantly increased compared with the control group(P<0.05).Conclusions:Collectively,dietary supplementation of 600μg/kg MCE and 5×108 CFU/kg compound Bacillus can improve laying performance by improving microbiota to enhance antioxidant capacity and intestinal barrier,regulate reproductive hormones and the concentration of cecal short-chain fatty acids of laying hens,and the combined effect of MCE and Bacillus is better than that of single supplementation. | Fei Wang Peng Zou Shujie Xu Qi Wang Yuanhao Zhou Xiang Li Li Tang Baikui Wang Qian Jin Dongyou Yu Weifen Li | 2023 | Journal of Animal Science and Biotechnology2023，14，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员