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Research ArticleOpen accessIn the keywordsFeatures of Growth and Development in Heifers of Holstein and Black-and-White BreedsElena A. Babich, Berik S. Aryngaziev, Lyudmila Y. Ovchinnikova, Alexander A. OvchinnikovThe study of the characteristics of the growth and development of farm animals is of interest in breeding, as it will help to improve animal breeds, as well as serve for the organization of fast and economically rational raising of productive livestock. The research aims to study the characteristics of growth and development and indicators of reproduction of the Holstein … …OnLine Journal of Biological Sciences, Vol. 22, Issue 4 · 8 Dec 2022 · 4,779 accessesView PDFCite
Research ArticleOpen accessIn the keywordsDynamical Analysis on the Transmission of Pertussis with Maternally Derived ImmunityAisha Aliyu Yakubu, Farah Aini Abdullah, Ahmad Izani Md Ismail, Yazariah Mohd YatimA susceptible-infected-recovered compartmental model incorporating maternally derived immunity compartment is analyzed in this study. The stability of the pertussis-disease-free and endemic equilibrium is studied. The basic reproduction number is obtained and its behavior analyzed by varying parameters. Numerical simulations indicated that when the waning parameter is increased, the frequency at which the population attains stability varies. However, the infected population … …Journal of Mathematics and Statistics, Vol. 16, Issue 1 · 26 Jun 2020 · 6,299 accessesView PDFCite
Research ArticleOpen accessIn the keywordsThe Single and Combined Effect of MC4R and GH Genes on Productive Traits of PigsLyubov Getmantseva, Maria Leonova, Aleksander Usatov et al.The aim of our work is to identify the single and combined effect of MC4R and GH polymorphism genes on growth and reproduction traits of pigs. The study was carried out on 204 crossbred F1 females (♀Landrace х ♂Large White) of the Breeding Farm in Russia. The analyzed productive traits were: The number of Days to 100-kg (Days to 100 … …American Journal of Agricultural and Biological Sciences, Vol. 12, Issue 1 · 18 Jan 2017 · 8,119 accessesView PDFCite
Research ArticleOpen accessIn the keywordsModeling the Dynamics of Tuberculosis Transmission in Children and AdultsF. Nyabadza, M. KgosimoreProblem statement: The fight Against Tuberculosis (TB) has mainly focused on the adult population because children were perceived to pose a very low risk in TB transmission. This assumption ignores the potential risk children had as reservoirs of latent infections from which future cases evolve when they become adults. It was therefore important to investigate the dynamics of TB taking … …Journal of Mathematics and Statistics, Vol. 8, Issue 2 · 5 Jun 2012 · 7,155 accessesView PDFCite
Research ArticleOpen accessIn the keywordsClinical Pregnancy After Assisted Hatching Rate in Young women undergoing Intra Cytoplasmic Sperm InjectionMohammed Al-SunaidiProblem statement: The ability of a blast cyst to hatch, or escape, from the Zona Pellucida (ZP) that surrounds and protects the embryo during its first few days of development is one of many critical events that must occur for successful reproduction. Implantation of the embryo in the uterine lining is impossible unless hatching occurs. Hard or thick ZP will … …American Journal of Applied Sciences, Vol. 9, Issue 6 · 13 Mar 2012 · 7,049 accessesView PDFCite
Research ArticleOpen accessIn the keywordsRole of Endometrial Thickness on Intracytoplasmic Sperm InjectionMohammed Al-SunaidiProblem statement: Endometrial receptivity is a key factor in successful outcome of in vitro fertilization. The endometrial receptivity is determined clinically by estimation of endometrial thickness and pattern by ultrasonography. This study was performed to evaluate the overall effect of endometrial thickness on pregnancy rate, multiple pregnancy rate and miscarriage rate in infertile women undergoing Intracytoplasmic Sperm Injection (ICSI) cycles … …American Journal of Applied Sciences, Vol. 9, Issue 4 · 13 Feb 2012 · 7,713 accessesView PDFCite
Research ArticleOpen accessIn the keywordsControl of the Transmission of Chikungunya Fever Epidemic Through the use of AdulticideS. Naowarat, Walaipun Tawara, I. Ming TangProblem statement: Another newly emerging disease, chikungunya fever, has appeared in various places such as the Island of Réunion, Thailand and other India. To control an epidemic of disease once it has been established, the use of adulticide is proposed. Approach: To simulate the effects of different control measurement, a mathematical model incorporating the specific features of this disease has … …American Journal of Applied Sciences, Vol. 8, Issue 6 · 13 Jun 2011 · 7,017 accessesView PDFCite
Research ArticleOpen accessIn the keywordsEpidemiological Models Applied to Viruses in Computer NetworksJos R.S. Piqueira, Betyna F. Navarro, Luiz H.A. MonteiroTo investigate the use of classical epidemiological models for studying computer virus propagation we described analogies between computer and population disease propagation using SIR (Susceptible-Infected-Removed) epidemiological models. By modifying these models with the introduction of anti-viral individuals we analyzed the stability of the disease free equilibrium points. Consequently, the basal virus reproduction rate gives some theoretical hints about how to … …Journal of Computer Science, Vol. 1, Issue 1 · 31 Mar 2005 · 7,582 accessesView PDFCite
Research ArticleOpen accessIn the keywordsOptimizing Boar Epididymal Sperm Preservation: Comparative Analysis of Slicing Float-Up vs. Flushing and BTS vs. Andromed® Extenders on Sperm Motility and Morphometry TraitsMamonene Angelinah Thema, Ntuthuko Raphael Mkhize, Gerhard van der Horst et al.Epididymal sperm collection represents a valuable strategy for preserving genetics from deceased or castrated boars of superior breeding value. The two primary collection methods-slicing float-up (high sperm yield) and flushing (low blood contamination risk)-differ in sperm recovery efficiency, while semen extenders provide cryoprotective nutrients that protect against cold shock during preservation. This study compared the effects of slicing float-up versus … …American Journal of Animal and Veterinary Sciences, Vol. 20, Issue 4 · 14 Mar 2026 · 1,800 accessesView PDFCite
Research ArticleOpen accessIn the keywordsOptimalization of the Swim-Up Method for Bali Bull Sperm: Effect of Incubation Time and Medium on Sperm KineticsAthhar Manabi Diansyah, Muhammad Yusuf, Rahmat et al.Bali bulls (Bos javanicus) are an essential part of Indonesia’s indigenous livestock, prized for their ability to thrive in challenging environments, their natural disease resistance, and their strong reproductive capabilities. The aim of this study was to refine the swim-up technique for preparing Bali cattle sperm. We evaluated the effects of two commonly used media Tyrode's Albumin Lactate Pyruvate (TALP) … …American Journal of Animal and Veterinary Sciences, Vol. 20, Issue 4 · 9 Feb 2026 · 1,696 accessesView PDFCite