Results 81 to 90 of about 86,546 (308)

A mathematical optimisation model of a New Zealand dairy farm: The integrated dairy enterprise (IDEA) framework [PDF]

, 2012
Optimisation models are a key tool for the analysis of emerging policies, price sets, and technologies within grazing systems. A detailed nonlinear optimisation model of a New Zealand dairy farming system is described.
Adler, Alfredo A., Doole, Graeme J., Romera, Alvaro J.   +2 more
core   +1 more source

Influence of Feeding Enzymatically Hydrolyzed Yeast Cell Wall on Growth Performance and Digestive Function of Feedlot Cattle during Periods of Elevated Ambient Temperature. [PDF]

, 2015
In experiment 1, eighty crossbred steers (239±15 kg) were used in a 229-d experiment to evaluate the effects of increasing levels of enzymatically hydrolyzed yeast (EHY) cell wall in diets on growth performance feedlot cattle during periods of elevated ...
Arzola, C, González-Vizcarra, V, Manríquez-Núñez, OM, Montaño-Gómez, MF, Navarrete-Reyes, JD, Raymundo, C, Salinas-Chavira, J, Zinn, RA   +7 more
core   +2 more sources

Interaction between Molten Al‐Killed Mn–B Steel and Carbon‐Bonded MgO Refractories Based on Recyclates

Advanced Engineering Materials, EarlyView.
High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé, Lukas Neubert, Anton Yehorov, Till M. J. Stadtmüller, Christos G. Aneziris, Olena Volkova   +5 more
wiley   +1 more source

Influence of an Argon/Silane Atmosphere on the Temperature of a Thermal Plasma

Advanced Engineering Materials, EarlyView.
The influence of a silane‐doped argon atmosphere on the chemical composition and temperature of a thermal nontransferring argon plasma is investigated using optical emission spectroscopy. As a result of the high amount of free electrons resulting from the stepwise ionization and dissociation of the silane molecule, even a silane addition of 0.01 vol ...
Lena Kreie, David Kramer, Thomas Scheithauer, Hans Jürgen Maier, Thomas Hassel   +4 more
wiley   +1 more source

Multivariate approach of inter-relationships among growth, consumption and carcass traits in Nellore cattle

Revista Ciência Agronômica
The objective of the present study was to analyze the phenotypic inter-relationships between growth, feed intake and carcass traits in polled Nellore cattle, as well as to determine which bulls produced the most efficient progeny.
Cláudio Ulhôa Magnabosco, Fernando Brito Lopes, Eliane Sayuri Miyagi, Raysildo Barbosa Lôbo, Roberto Daniel Sainz   +4 more
doaj   +1 more source

Effects of organic plant oils and role of oxidation on nutrient utilization in juvenile rainbow trout (Oncorhynchus mykiss) [PDF]

, 2012
The study compared the effect of four either fresh or force oxidized organic plant oils in diets for juvenile rainbow trout (Oncorhynchus mykiss) in which 47% of conventional LT fish meal protein was substituted by a mixture of 3 organic plant protein ...
A. Jokumsen, Bell, Bligh, Bransden, Børsting, C. Jacobsen, Caballero, Dalsgaard, Fountoulaki, Geurden, Geurden, I. Lund, J. Dalsgaard, J. Holm, J.H. Hansen, Jobling, Kaitaranta, Kasumyan, Kolar, Koshio, Laohabanjong, Lund, Lund, Lutterodt, Menoyo, Mente, Ng, Peng, Petersen, Petterson, Pickova, Ping, Shahidi, Shantha, Singh, Sun-Waterhouse, Takeda, Tyl   +37 more
core   +1 more source

Pedigree and genomic analyses of feed consumption and residual feed intake in laying hens

Poultry Science, 2013
Efficiency of production is increasingly important with the current escalation of feed costs and demands to minimize the environmental footprint. The objectives of this study were 1) to estimate heritabilities for daily feed consumption and residual feed intake and their genetic correlations with production and egg-quality traits; 2) to evaluate ...
Wolc, Anna, Arango, Jesus, Jankowski, Tomasz, Settar, Petek, Fulton, Janet, O'Sullivan, Neil, Fernando, Rohan, Garrick, Dorian, Dekkers, Jack   +8 more
openaire   +3 more sources

Effects of feeding level on efficiency of high- and low-residual feed intake beef steers [PDF]

Journal of Animal Science, 2019
Abstract Comparing heat production after ad libitum (ADLIB) and restricted (RESTRICT) feeding periods may offer insight into how residual feed intake (RFI) groups change their energy requirements based on previous feeding levels. In this study, the authors sought to explain the efficiency changes of high- and low-RFI steers after feed ...
Emily M Andreini, Sheyenne M Augenstein, Carrie S Fales, Roberto D Sainz, James W Oltjen   +4 more
openaire   +5 more sources

Effect of Oxygen Content on Surface and Subsurface Integrity During Turning of Ti–6Al–4V

Advanced Engineering Materials, EarlyView.
This study examines how oxygen content in the ambient atmosphere affects the surface and subsurface properties of Ti–6Al–4V during turning. Results show that oxygen does not influence surface roughness. However, machining in an extremely high vacuum‐adequate atmosphere increases surface hardness by up to 7.8% and induces compressive residual stresses ...
Benjamin Bergmann, Berend Denkena, Hilke Petersen, Florian Schaper   +3 more
wiley   +1 more source

Genomic dissection and prediction of feed intake and residual feed intake traits using a longitudinal model in F2 chickens

Animal, 2018
Feed efficiency traits (FETs) are important economic indicators in poultry production. Because feed intake (FI) is a time-dependent variable, longitudinal models can provide insights into the genetic basis of FET variation over time.
H. Emamgholi Begli, R. Vaez Torshizi, A.A. Masoudi, A. Ehsani, J. Jensen   +4 more
doaj   +1 more source