检索结果-南通市图书馆

Graded methionine dietary inclusions influence growth performance and apparent ileal amino acid digestibility coefficients and disappearance rates in broiler chickens

引用

Animal Nutrition 2022年第1期8卷 160-168页

作者： Shemil P.Macelline Peter V.Chrystal leon r.mcquade Bernard V.Mclnerney Yangsu Kim Yumin Bao Peter H.Selle Sonia Y.Liu Poultry research Foundation The University of SydneyCamdenNSW2570Australia School of Life and Environmental Sciences Faculty of ScienceThe University of SydneySydneyNSW2006Australia Baiada Poultry Ltd Pendle HillNSW2145Australia Australian Proteome Analysis Facility Macquarie UniversitySydneyNSW2109Australia CJ Bio 330Dongho-roJung-guSeoul100-400Republic of Korea redox Pty Ltd MintoNSW2566Australia Sydney School of Veterinary Science The University of SydneyCamdenNSW2570Australia

Graded quantities of 1.38,2.76 and 4.14 g/kg L-methionine were included in a control diet formulated to contain 3.07 g/kg digestible *** of the 4 dietary treatments was offered to 6 replicate cages(initially 8 birds per cage)from 1 to 21 d *** parameters assessed included growth performance,nutrient utilisation(apparent metabolisable energy[AME],AME:GE ratios,N retention,Ncorrected apparent metabolisable energy[AMEn]),apparent digestibility coefficients and disappearance rates of amino acids in the distal *** also included free amino concentrations in systemic plasma(brachial vein)at 20 d postehatch and in hepatic tissue at 14 and 21 d *** L-methionine inclusions quadratically influenced weight gain(r=0.688;P=0.001)and FCr(r=0.780;Prom the quadratic regressions that 3.43 g/kg L-methionine supported maximum weight gain of 1,036 g/kg and 3.50 g/kg L-methionine minimum FCr of 1.193,from 1 to 21 d *** control diet contained specified levels of 3.07 g/kg digestible methionine and 13.0 g/kg digestible ***,an inclusion of 3.465 g/kg L-methionine corresponded to a total of 6.535 g/kg methionine or a methionine-to-lysine ratio of 50.3,which is higher than standard *** implications of this and other outcomes of the present study are reported and discussed.

关键词： Amino acid Broiler chicken Methionine

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Assessment of limiting dietary amino acids in broiler chickens offered reduced crude protein diets

引用

Animal Nutrition 2022年第3期10卷 1-11页

作者： Craig W.Maynard Michael T.Kidd Peter V.Chrystal leon r.mcquade Bernie V.McInerney Peter H.Selle Sonia Y.Liu Center of Excellence for Poultry Science University of ArkansasFayettevilleAR72701United States Poultry research Foundation Faculty of ScienceThe University of Sydney425 Werombi RoadCamdenNSW2570Australia School of Life and Environmental Sciences Faculty of ScienceThe University of SydneySydneyNSW2006Australia Australian Proteome Analysis Facility Macquarie UniversitySydneyNSW2109Australia Sydney School of Veterinary Science Faculty of ScienceThe University of SydneySydneyNSW2006Australia

As lowering crude protein(CP)in poultry diets continues to minimize amino acid excess,it is important to understand the limiting order of amino acids and the impact of their ***,a pair of experiments were conducted to observe the effects of individual amino acid deletions on growth performance,carcass traits,and nutrient *** experiments involved 3 control diets based on wheat and soybean meal,including a 210.0 g/kg CP industry control(IC),186.7 g/kg CP positive control(PC)supplemented with feed-grade amino acids to match the IC amino acid profile,186.7 g/kg CP negative control(NC)with reducing N corrected apparent metabolizable energy(AMEN)by 0.5 MJ/kg and removing feed-grade amino acids beyond L-Lys-HCl,DL-Met,and L-Thr from *** deletion diets where the following supplemented amino acids were individually removed from the PC:Val,Ile,Leu,Trp,Arg,His,Phe t Tyr,glycine equivalence(Glyequi),Pro,and Energy(0.5 MJ/kg reduction in AMEN of the PC).All diets were formulated to contain similar concentrations of digestible Lys,total sulfur amino acid(TSAA)and *** diets were offered to broiler chickens from 15 to 22 d postehatch in a cage study(Exp.1)to gain digestibility and nutrient utilization data;whereas they were offered from 15 to 35 d post ehatch in a floor-pen study(Exp.2)to gain performance and carcass yield *** removal of supplemented Val,Arg,and Ile resulted in reduction on broiler performance(Premoval of Val,Arg,Ile,and Glyequi negatively influenced carcass traits(Presults from both experiments indicate that Val and Arg are co-limiting in wheat-soybean meal diets,but that Ile and Glyequi may potentially limit breast and thigh development.

关键词： Amino acid Broiler chicken Crude protein Low protein diet

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

reducing agent and exogenous protease additions,individually and in combination, to wheat-and sorghum-based diets interactively influence parameters of nutrient utilisation and digestive dynamics in broiler chickens

引用

Animal Nutrition 2016年第4期2卷 303-311页

作者： Peter H.Selle Ha H.Truong leon r.mcquade Amy F.Moss Sonia Yun Liu Poultry research Foundation The University of Sydney Poultry CrC University of New England Australian Proteome Analysis Facility Macquarie University

The objective of the study was to investigate the possibility that tandem inclusions of a reducing agent and a protease may advantage chicken-meat production and to ascertain if the established benefits of including sodium metabisulphite in sorghum-based diets extend to wheat-based diets. The study comprised a 2 x 2 x 2 factorial array of treatments in which either nutritionally iso-nitrogenous and isoenergetic wheat-or sorghum-based diets, without and with sodium metabisulphite(2.75 g/kg), without and with protease(1,000 units/kg) were offered to broiler chickens from 7 to 28 days post-hatch. The effects of dietary treatments on growth performance, nutrient utilisation, protein(N) and starch digestibility coefficients and digestive dynamics were determined. A preliminary investigation into the effects of two treatments on concentrations of free amino acids and glucose in the portal circulation was conducted. There was significant feed grain by sodium metabisulphite interactions(P = 0.03 to 0.005) for parameters of nutrient utilisation(AME, ME:GE ratios, N retention, AMEn). For example, sodium metabisulphite inclusions in sorghum-based diets enhanced AME by 0.18 MJ(12.47 versus 12.29 MJ/kg) but depressed AME by 0.43 MJ(11.88 versus 12.31 MJ/kg) in wheat-based diets. There was a linear relationship between starch:protein disappearance rate ratios in the distal ileum with weight gain(r =-0.484; P = 0.0012) indicating that condensed ratios(or absorption of more protein relative to starch) advantaged growth performance. Concentrations of free amino acids in the portal circulation or the post-enteral availability of certain amino acids, including the branched-chain amino acids, methionine, phenylalanine and threonine, were significantly correlated to FCr. For example, threonine concentrations were negatively correlated to FCr(r =-0.773; P = 0.005). Finally, tandem inclusions of sodium metabisulphite and protease in sorghum-based diets may hold merit but it appears that t

关键词： Amino acids Broiler chickens Protease Sodium metabisulphite

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Capping dietary starch:protein ratios in moderately reduced crude protein,wheat-based diets showed promise but further reductions generated inferior growth performance in broiler chickens

引用

Animal Nutrition 2020年第2期6卷 168-178页

作者： Shiva Greenhalgh Bernard V.McInerney leon r.mcquade Peter V.Chrystal Ali Khoddami Molly A.M.Zhuang Sonia Y.Liu Peter H.Selle Poultry research Foundation The University of SydneyCamdenNSWAustralia Australian Proteome Analysis Facility Macquarie UniversitySydneyNSWAustralia Baiada Poultry Pty Limited Pendle HillNSWAustralia School of Life and Environmental Sciences Faculty of ScienceThe University of SydneySydneyNSWAustralia

The hypothesis that capping dietary starch:protein ratios would enhance the performance of broiler chickens offered reduced-crude protein(CP)diets was tested in this experiment.A total of 432 off-sex,male ross 308 chicks were allocated to 7 dietary treatments from 7 to 35 d *** experimental design consisted of a 3×2 factorial array of treatments with the seventh treatment serving as a positive *** levels of dietary CP(197.5,180.0 and 162.5 g/kg)with either uncapped or capped dietary starch:protein ratios constituted the factorial array of treatments,whilst the positive control diet contained 215.0 g/kg *** positive control diet had an analysed dietary starch:protein ratio of 1.50 as opposed to a ratio of 1.68 in the uncapped 197.5 g/kg CP diet and 1.41 in the corresponding capped diet and the capped 197.5 g/kg CP diet displayed *** growth performance this diet matched the positive control but outperformed the uncapped 197.5 g/kg CP diet by 10.4%(2,161 vs.1,958 g/bird;P=0.009)in weight gain,by 3.10%(3,492 vs.3,387 g/bird;P=0.019)in feed intake on the basis of pairwise comparisons and numerically improved FCr by 4.04%(1.616 vs.12684).However,the growth performance of birds offered the 180.0 and 162.5 g/kg CP dietary treatments was remarkably inferior,irrespective of dietary starch:protein *** inferior growth performance was associated with poor feathering and even feather-pecking and significant linear relationships between feather scores and parameters of growth performance were *** amino acid profile of feathers was determined where cysteine,glutamic acid,glycine,proline and serine were dominant in a crude protein content of 931 g/***,the feathering issues observed were manifestations of amino acid inadequacies or imbalances in the more reduced-CP diets and consideration is given to the implications of these outcomes.

关键词： Amino acid Broiler chicken Crude protein Feathering Starch:protein ratio Wheat

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Implications of excreta uric acid concentrations in broilers offered reduced crude protein diets and dietary glycine requirements for uric acid synthesis

引用

Animal Nutrition 2021年第4期7卷 939-946页

作者： Peter H.Selle David I.Cantor leon r.mcquade Bernard V.McInerney Juliano Cesar de Paula Dorigam Shemil P.Macelline Peter V.Chrystal Sonia Y.Liu Poultry research Foundation within The University of Sydney CamdenNSW 2570Australia Sydney School of Veterinary Science The University of SydneySydneyNSW 2006Australia Australian Proteome Analysis Facility Macquarie UniversitySydneyNSW 2109Australia Evonik Nutrition and Care GmbH Hanau-Wolfgang 63547Germany School of Life and Environmental Sciences Faculty of ScienceThe University of SydneySydneyNSW 2006Australia Baiada Poultry Pty Limited Pendle HillNSW 2145Australia

In a previous experiment,male ross 308 broiler chickens were offered dietary treatments with 3 levels of crude protein(222,193,165 g/kg)and 3 feed grains(ground maize,ground wheat,whole wheat)from 7 to 35 d ***-based diets supported superior growth performance in comparison to wheatbased *** acid concentrations in excreta were retrospectively determined and related to total nitrogen(N)excreta *** acid concentrations ranged from 28.5 to 69.4 mg/g and proportions of uric acid-N to total excreta-N ranged from 27.4%to 42.6%in broiler chickens offered the 3×3 factorial array of dietary *** of uric acid-N to total N in excreta in birds offered the165 g/kg CP,maize-based diet were significantly lower by 10.6 percentage units(27.4%versus 38.0%;P=0.00057)than their wheat-based *** excreta analysed had been collected from 35 to37 d post-hatch when feed intakes and excreta outputs were *** were linear relationships between proportions of uric acid-N to total N in excreta in birds offered the three 165 g/kg CP diets with weight gain(r=-0.587;P=0.010),feed intake(r=-0.526;P=0.025)and feed conversion ratios(r=0.635;P=0.005).The possibility that increasing uric acid-N proportions in excreta is indicative of excessive ammonia accumulations compromising growth performance is *** mean proportion of dietary glycine involved in uric acid excretion was 49.2%across all dietary treatments but ranged from 25.0%to 80.9%.Thus,the appropriate amount of dietary glycine is variable and largely dependent on the volume of uric acid synthesised and excreted.

关键词： Ammonia Broiler chicken Glycine reduced crude protein diet Uric acid

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Protein digestive dynamics of meat and bone meals in broiler chickens

引用

Animal Nutrition 2020年第4期6卷 521-528页

作者： Shemil P.Macelline leon r.Mc Quade Bernie V.Mclnerney Amy F.Moss Peter H.Selle Sonia Y.Liu School of Life and Environmental Sciences Faculty of ScienceThe University of SydneySydneyNSW2006Australia Poultry research Foundation The University of SydneyCamdenNSW2570Australia Australian Proteome Analysis Facility Macquarie UniversitySydneyNSW2109Australia School of Environmental and rural Science University of New EnglandArmidaleNSW2351Australia

This study determined the variations in protein digestibilities and digestion rates in broiler chickens offered diets containing 7 different meat and bone meals(MBM).A total of 252 male ross 308 broiler chickens were offered 7 atypical diets largely based on maize and MBM from 24 to 28 d *** experimental diet was offered to 6 replicates with 6 birds per replicate *** were collected in their entirety from 25 to 27 d post-hatch and on 28 d *** samples were collected from the proximal jejunum,distal jejunum,proximal ileum and distal *** digestibilities of protein were determined in each segment and apparent digestibilities of amino acids were measured in the distal *** were significant differences in apparent protein digestibility coefficients in the proximal jejunum(P=0.006),where broiler chickens offered the high ash beef meal(diet 7)generated the lowest protein digestibility in the proximal jejunum(0.318).Similarly,there were significant differences in apparent digestibility coefficients in the distal jejunum(Proximal *** pronounced differences were found in the disappearance rate of protein and there were significant differences in all 4 segments of the small intestine(Proiler chickens offered the high ash beef meal had the lowest protein disappearance rate(Prence was observed in the predicted protein digestion rate(P=0.486)but chickens offered the high ash beef meal had the lowest potential digestible protein(0.662,P=0.034)whereas the highest potential digestible protein(0.739)was detected in diet 5(containing a beef meal).This study contributed to the establishment of a preliminary database to include digestion rates of starch and protein into practical diet formulation.

关键词： Amino acid Digestibility Digestive dynamics Meat and bone meal Protein digestion rate

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

From the dust:extracellular vesicles as regulators of development and neuroregeneration

引用

Neural regeneration research 2024年第5期19卷 933-934页

作者： leon G.Coleman Jr The University of North Carolina at Chapel Hill School of MedicineDepartment of PharmacologyBowles Center for Alcohol StudiesChapel HillNCUSA

First impressions can have a lasting *** science,this can be especially problematic,because our lack of understanding often causes us to mislabel and thus ignore important biological *** this vein,extracellular vesicles(EVs)were once considered to be“cellular dust”.Similar to the previous concept of“junk DNA”to describe protein non-coding regions,EVs are far more than just cellular *** fact,EVs are emerging as key mediators of intracellular communication across nearly all biological *** includes peripheral immune responses(e.g.,arthropathies and sepsis),intra-organ communication(Seim et al.,2023),and a host of other physiological and pathological states(Figure 1A and B).

关键词： Figure extracellular

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

APPrOXIMATING THE STATIONArY BELLMAN EQUATION BY HIErArCHICAL TENSOr PrODUCTS

引用

Journal of Computational Mathematics 2024年第3期42卷 638-661页

作者： Mathias Oster leon Sallandt reinhold Schneider Technische Universität Berlin Strasse des 17.Juni 13510623 BerlinGermany

We treat infinite horizon optimal control problems by solving the associated stationary Bellman equation numerically to compute the value function and an optimal feedback *** dynamical systems under consideration are spatial discretizations of non linear parabolic partial differential equations(PDE),which means that the Bellman equation suffers from the curse of *** non linearity is handled by the Policy Iteration algorithm,where the problem is reduced to a sequence of linear equations,which remain the computational bottleneck due to their high *** reformulate the linearized Bellman equations via the Koopman operator into an operator equation,that is solved using a minimal residual *** the Koopman operator we identify a preconditioner for operator equation,which deems essential in our numerical *** overcome computational infeasability we use low rank hierarchical tensor product approximation/tree-based tensor formats,in particular tensor trains(TT tensors)and multi-polynomials,together with high-dimensional quadrature,*** controlling a destabilized version of viscous Burgers and a diffusion equation with unstable reaction term numerical evidence is given.

关键词： Feedback control Dynamic programming Hamilton-Jacobi-Bellman Tensor product approximation Variational Monte-Carlo

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Speed and surface steepness affect internal tibial loading during running

引用

Journal of Sport and Health Science 2024年第1期13卷 118-124页

作者： Hannah rice Markus Kurz Patrick Mai leon robertz Kevin Bill Timothy r.Derrick Steffen Willwacher Department of Physical Performance Norwegian School of Sport SciencesOslo 0806Norway Sports Tech research Centre Mid Sweden UniversityÖstersund SE-83125Sweden Department of Mechanical and Process Engineering Offenburg University of Applied SciencesOffenburg 77652Germany Institute of Biomechanics and Orthopaedics German Sport University CologneCologne 50933Germany Department of Kinesiology Iowa State UniversityAmesIA 50011USA

Background:Internal tibial loading is influenced by modifiable factors with implications for the risk of stress *** encounter varied surface steepness(gradients)when running outdoors and may adapt their speed according to the *** study aimed to quantify tibial bending moments and stress at the anterior and posterior peripheries when running at different speeds on surfaces of different ***:Twenty recreational runners ran on a treadmill at 3 different speeds(2.5 m/s,3.0 m/s,and 3.5 m/s)and gradients(level:0%;uphill:+5%,+10%,and+15%;downhill:-5%,-10%,and-15%).Force and marker data were collected synchronously *** moments were estimated at the distal third centroid of the tibia about the medial-lateral axis by ensuring static equilibrium at each 1%of *** was derived from bending moments at the anterior and posterior peripheries by modeling the tibia as a hollow ***-way repeated-measures analysis of variance were conducted using both functional and discrete statistical ***:There were significant main effects for running speed and gradient on peak bending moments and peak anterior and posterior *** running speeds resulted in greater tibial *** uphill at+10%and+15%resulted in greater tibial loading than level *** downhill at-10%and-15%resulted in reduced tibial loading compared to level *** was no difference between+5%or-5%and level ***:running at faster speeds and uphill on gradients≥+10%increased internal tibial loading,whereas slower running and downhill running on gradients≥-10%reduced internal *** running speed according to the gradient could be a protective mechanism,providing runners with a strategy to minimize the risk of tibial stress injuries.

关键词： Bending moments Gradient Musculoskeletal modeling Overuse injury Tibial stress Training factors

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Dynamic Network Game of the Fintech Industry

引用

Journal of the Operations research Society of China 2024年第1期12卷 5-33页

作者： David W.K.Yeung leon A.Petrosyan Ying-Xuan Zhang SrS Consortium for Advanced Study in Cooperative Dynamic Games Shue Yan UniversityHong KongChina Center of Game Theory St Petersburg State UniversitySaint PetersburgRussia Department of Finance Asia UniversityTaichung CityTaiwanChina Faculty of Applied Mathematics-Control Processes and Center of Game Theory St Petersburg StateUniversitySaint PetersburgRussia

Economies of scale,economies of scope,and technology spillover are decisive eco-nomic elements that are crucial to the development in the Fintech *** externalities are often realized through network *** this paper,we presenta dynamic network ofﬁnancialﬁrms which exhibits these decisive *** game equilibria are characterized.A Pareto efﬁcient solution involving col-laboration of allﬁrms is *** obtain a fair-share distribution of cooperativegains,the Shapley value is adopted as the sharing *** distributionmechanisms which guarantee the fulﬁlment of the Shapley value distribution in eachstage of the cooperation duration are derived.

关键词： Network game Network equilibria Shapley value Pareto efﬁcientcooperation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：