Results 261 to 270 of about 2,765,137 (301)

OBSERVATIONS OF THE FIRST SERVICE NON‐RETURN RATES OF THE HYPOGLYCAEMIC, CONCENTRATE‐FED DAIRY HERDS

Australian Veterinary Journal, 1978
SUMMARY Fourteen dairy herds which had been subjected to the Compton Metabolic Profile test on a total of 29 occasions were selected from the records of the Institute for Research on Animal Diseases, United Kingdom, because they had a wide range of mean blood‐glucose concentrations.
T J, McClure, J M, Payne
openaire   +2 more sources

Investigating the genetic architecture of conception and non-return rates in Holstein cattle under heat stress conditions

Tropical Animal Health and Production, 2019
This study aimed to investigate the genetic variability of conception rate (CR) and non-return rate (NR) in Iranian dairy cows under heat stress conditions. A total of 34,304 records of CR, and NR at 45 days (NR45) and 90 days (NR90) after the first insemination, from 21,405 Holstein cows were included in this study.
Ansari-Mahyari, Saeid, Ojali, Mohammad Reza, Forutan, Mehrnush, Riasi, Ahmad, Brito, Luiz F.   +4 more
openaire   +3 more sources

The Relationship Between Post‐Thaw Sperm DNA Integrity and Non‐Return Rate Among Norwegian Cross‐Bred Rams

Reproduction in Domestic Animals, 2012
ContentsWith the aim of investigating the relationship between sperm DNA integrity and non‐return rate (NRR) among Norwegian cross‐bred rams, semen from 15 individuals was examined by flow cytometry. Sperm Chromatin Structure Assay (SCSA) quantifies the proportion of spermatozoa with denatured DNA after in situ acid treatment, and the four parameters %
A B, Nordstoga, A, Krogenæs, A, Nødtvedt, W, Farstad, K, Waterhouse   +4 more
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Mixed data rate and format transmission (40-Gbit/s non-return-to-zero, 40-Gbit/s duobinary, and 10-Gbit/s non-return-to-zero) by mid-link spectral inversion

Optics Letters, 2004
A polarization-diverse subsystem based on periodically poled lithium niobate waveguides is used as an optical phase conjugator for compensation for linear and nonlinear distortion. We show successful transmission formats of 13 x 40 Gbit/s non-return-to-zero mixed with 6 x 10 Gbit/s non-return-to-zero and 40-Gbit/s duobinary over 8 x 100 km of standard ...
S L, Jansen, G D, Khoe, H, de Waardt, S, Spälter, C J, Weiske, A, Schöpflin, S J, Field, H E, Escobar, M H, Sher   +8 more
openaire   +2 more sources

Estimation of genetic parameters for non‐return rate (NRR) in German herdbook Pietrain and Landrace AI boars

Journal of Animal Breeding and Genetics, 2002
SummaryBetween January 1993 and May 2000, 95 136 artificial insemination (AI) records of 445 Bavarian boars were recorded by three Bavarian AI stations. The analysis of the non‐return rate (NRR) was based on AI matings performed by AI technicians. The animal models applied for estimation of variance components for NRR included the fixed effects of AI ...
R. Steinheuer, H. Hamann, O. Distl
openaire   +1 more source

Linear model evaluations of non-return rates for dairy and beef bulls in Canadian AI

Canadian Journal of Animal Science, 1993
Québec artificial insemination data from 518 609 first inseminations performed by 304 AI technicians in 15 488 herds using semen from 1750 dairy and beef AI bulls were analyzed using a mixed linear model. The effects of month of insemination, age of cow, semen price, breed of service sire, technician and herd were included in an evaluation of service ...
openaire   +1 more source

Comparison on models for genetic evaluation of non-return rate and success in first insemination of the Danish Holstein cows

Livestock Science, 2010
Abstract The aim of is study was to compare a linear Gaussian model with logit model and probit model for genetic evaluation of non-return rate within 56 d after first-insemination (NRR56) and success in first insemination (SFI). The whole dataset used in the analysis contained 471,742 records from the first lactation of the Danish Holstein cows ...
Sun, C, Su, G
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Experimental evaluation of ring resonator filters impact on the bit error rate in non return to zero transmission systems

Optics Communications, 2004
The paper discusses an experimental investigation of the impact of a single ring resonator and a double ring resonator filter on the performance of an optical communication Non Return to Zero system at 2.5 and 10 Gbit/s. Bit Error Rate curves are reported and discussed.
A Melloni, M Martinelli, Giuseppe Cusmai, R Siano   +3 more
openaire   +1 more source

Genetic studies on fertility in AI bulls. II. Environmental and genetic effects on non-return rates of young bulls

Animal Reproduction Science, 1994
Abstract Since male fertility is vitally important for cattle breeders, bull studs require means to select bulls efficiently for this trait and to cull those found below par. The present study was undertaken to investigate possible causes of variation in male fertility, measured as non-return rate (NRR), and to estimate genetic parameters for ...
Eva-Marie Stålhammar, Lennart Janson, Jan Philipsson   +2 more
openaire   +1 more source

Estimation of the potential fertility based upon non-return rates of bulls

In the present study, we aimed to develop a polyacrylamide gel that could be used instead of bovine cervical mucus in the cervical mucus penetration test (CMPT) to obtain coherent and replicable results in bulls. The frozen semen samples of six Holstein bulls, which were divided into two fertility groups as low and high according to their non-return ...
Tas, M., Bacinoglu, S., Cirit, Ue., Oezguemues, S., Kasgoez, H., Pabuccuoglu, S.   +5 more
openaire   +1 more source