Results 41 to 50 of about 311,062 (183)

Reasons and Risk Factors for the Incidences of Perinatal Calf Mortality and Twin Births in Locally-Born Holstein Dairy Cows Under Hot Environmental Conditions

open access: yesFolia Veterinaria
Perinatal calf mortality (PCM) and multiple pregnancies (twins) present significant challenges in dairy cattle breeding, impacting both economic viability and reproductive performance. This study examined risk factors for stillbirths and twin births in a
Ouarfli Lazoumi, Chehma Abdelmadjid
doaj   +1 more source

Large-radius Holstein polaron and the problem of spontaneous symmetry breaking

open access: yes, 2014
A translation-invariant solution is found for a large-radius Holstein polaron whose energy in the strong coupling limit is lower than that obtained by Holstein. The wave function corresponding to this solution is delocalized.
Lakhno, V. D.
core   +1 more source

Quantitative determination of fatty acids in the University of Vermont\u27s CREAM herd followed over the course of six months [PDF]

open access: yes, 2014
Holstein and Jersey cows were used to determine how the fatty acid profile of their milk differed with regard to breed of cow and season over the course of six months.
O\u27Day, John F, III
core   +1 more source

Surgical Treatment of a Unique Dermatofibroma in a Lactating Holstein Cow: Histopathologic and Immunohistochemical Features [PDF]

open access: yesIranian Journal of Veterinary Surgery
A lactating 6-year-old, black-white, Holstein cow, weighing about 300 kg, presented for a mass on her carp joint (right forelimb) with severe swelling of the entire carp. The cow had untreated swelling 3 months before.
Mahan Sarebani   +4 more
doaj   +1 more source

Isospin Mixing and Model Dependence [PDF]

open access: yes, 1997
We show that recent calculations of \Delta I=3/2 effects in nonleptonic hyperon decay induced by m_d-m_u\neq 0 are subject to significant model dependence.Comment: 8 page standard Latex ...
Holstein, Barry R., Na, Euy Soo
core   +3 more sources

Searching of Pregnancy Rate in Repeat Breeder Cows by Embryo Transfer Practices

open access: yesJournal of Agricultural Sciences, 2021
The aim of this study is to compare the pregnancy rates by applying embryo transfer to the cows which are not pregnant and should be removed from herd as repeat breeder. In this study, 87 randomlyselected Holstein cows utilized.
Hakan Sağırkaya, Erkan Say
doaj   +1 more source

Holstein polaron [PDF]

open access: yesPhysical Review B, 1999
We describe a variational method to solve the Holstein model for an electron coupled to dynamical, quantum phonons on an infinite lattice. The variational space can be systematically expanded to achieve high accuracy with modest computational resources (12-digit accuracy for the 1d polaron energy at intermediate coupling).
Bonča, Janez   +2 more
openaire   +2 more sources

Density matrix renormalization group study of optical conductivity in the one-dimensional Mott insulator Sr_2CuO_3

open access: yes, 2010
Applying newly developed dynamical density matrix renormalization group techniques at zero and finite temperatures to a Hubbard-Holstein model at half-filling, we examine the optical conductivity of a typical one-dimensional Mott insulator Sr_2CuO_3.
S. Maekawa   +2 more
core   +1 more source

Spectral Properties of Holstein and Breathing Polarons

open access: yes, 2006
We calculate the spectral properties of the one-dimensional Holstein and breathing polarons using the self-consistent Born approximation. The Holstein model electron-phonon coupling is momentum independent while the breathing coupling increases ...
A. Macridin   +12 more
core   +1 more source

Effects of β- and κ-casein, and β-lactoglobulin single and composite genotypes on milk composition and milk coagulation properties of Italian Holsteins assessed by FT-MIR

open access: yesItalian Journal of Animal Science, 2021
The present study aimed to investigate the effect of β- and κ- casein, and β-lactoglobulin genotypes on milk composition and milk coagulation properties predicted using Fourier-transform mid-infrared spectroscopy (FT-MIR).
Filippo Cendron   +4 more
doaj   +1 more source

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