Modeling Ruminant Digestion and Metabolism

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Springer Science & Business Media, 31 may. 1995 - 578 páginas
Role of mminants in human food production; Whyan animal scientist would choose to model animal systems; Basic organization of this book; Modeling principIes and terminology; Classification of models; Objectives in modeling; The modeling process I objective statements, block diagrams, equation forms and parameterization; Steps in modeling; Setting the modeling objective; Block diagrams; Formulation of mathematical statements; Development of numerical inputs; The modeling process II - solution algorithms, model evaluations and parameter estimation; Model solution algorithms; Evaluation of management and research models; Evaluation and use of analytical models for parameter estimation; Decision support software; Animal energetic models; Thermodynamic concepts in nutrition; Historical development of bases for feeding system models; Energy requirements for maintenance and production; Equations used to estimate maintenance and costs of production; Components of maintenanace; Protein and amino acid models; Current protein and amino acid systems; Analytic models of amino aicd and protein metabolism; Dynamic modeling; Biology and algebraic models of ruminant digestion; The rumen microbes and their metabolism; Balance models of ruminant digestion; An analytical model of rumen digestion; Microbial growth elements; Biology and algebraic models of growth; Classical equations for growth; Nutritional models of growth; Concepts of lhe basic biology of growth used in mechanistic models; Biology of lactation; Decent evolution of feeding systems for lactating dairy cattle; An analytical model of nutrient transactions during lactation; Dynamic models of ruminant digestion; Early dynamic models; Current dynamic models; Dynamic models of ruminant adipose tissue metabolism; Evolution of steady-state balance model; Radioisotope tracer elemets; Dynamic models of ruminant mammary metabolism; Development of model inputs and initial parameters; Descriptions of a model of mammary gland metabolism; Dynamic models of liver and viscera metabolism; Overall structure and notation; Mechanistic, dynamic models of growth; Beef growth models; Sheep growth and metabolism model; Lactation Background on MOLL Y. CSL; The program MOLL Y. CSL; Evaluation and use of a growth and lactation model; Behavioral analyses; Sensitivity analyses; Bioeconomic analyse.
 

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Índice

Modeling principles and terminology
9
22 Classification of models
11
23 Objectives in modeling
18
References
25
The modeling process I objective statements block diagrams equation forms and parameterization
27
33 Setting the modeling objective
28
34 Block Diagrams
30
35 Formulation of mathematical statements
34
93 Nutritional models of growth
254
94 Concepts of the basic biology of growth used in mechanistic models
259
References
261
Biology of lactation
265
102 Recent evolution of feeding systems for lactating dairy cattle
266
103 An analytical model of nutrient transactions during lactation
276
References
295
Dynamic models of ruminant digestion
298

36 Development of numerical inputs
47
References
65
The modeling process II solution algorithms model evaluations and parameter estimation
73
42 Model solution algorithms
74
43 Evaluation of management and research models
84
44 Evaluation and use of analytical models for parameter estimation
101
45 Decision support software
111
References
113
Animal energetic models
116
53 Historical development of bases for feeding system models
122
References
144
Energy requirements for maintenance and production
146
62 Equations used to estimate maintenance and costs of production
147
63 Components of maintenance
160
References
183
Protein and amino acid models
187
72 Current protein and amino acid systems
189
73 Analytic models of amino acid and protein metabolism
193
74 Dynamic modeling
202
References
204
Biology and algebraic models of ruminant digestion
209
83 Balance models of ruminant digestion
221
84 An analytical model of rumen digestion
229
85 Microbial growth elements
240
References
242
Biology and algebraic models of growth
245
92 Classical equations for growth
246
113 Current dynamic models
311
References
315
Dynamic models of ruminant adipose tissue metabolism
317
122 Evolution of steadystate balance model
319
123 Radioisotope tracer elements
339
References
366
Dynamic models of ruminant mammary metabolism
368
132 Development of model inputs and initial parameters
371
133 Descriptions of model of mammary gland metabolism
385
References
407
Dynamic models of liver and viscera metabolism
411
142 Overall structure and notation
412
References
436
Mechanistic dynamic models of growth
439
152 Beef growth models
440
153 Sheep growth and metabolism model
453
References
463
Lactation
467
162 Background on MOLLYCSL
470
163 The program MOLLYCSL
474
References
514
Evaluation and use of a growth and lactation model
517
173 Sensitivity analyses
533
174 Bioeconomic analyses
545
References
562
Index
565
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