A5085545070- Reproductive Physiology in Livestock
- Genetic and phenotypic traits in livestock
- Reproductive Biology and Fertility
- Effects of Environmental Stressors on Livestock
- Animal Genetics and Reproduction
- Sperm and Testicular Function
- Enterobacteriaceae and Cronobacter Research
- Livestock Management and Performance Improvement
- Cassava research and cyanide
- Plant tissue culture and regeneration
- Reproductive Health and Technologies
- Ovarian function and disorders
- Ruminant Nutrition and Digestive Physiology
- Renal and related cancers
- Reproductive biology and impacts on aquatic species
- Rural Development and Agriculture
- Toxoplasma gondii Research Studies
- Vector-Borne Animal Diseases
- Pluripotent Stem Cells Research
- Animal Behavior and Welfare Studies
- Peanut Plant Research Studies
- Helminth infection and control
- Connective tissue disorders research
- Growth and nutrition in plants
- Cardiac Valve Diseases and Treatments
Universidade Federal Rural do Rio de Janeiro
2016-2025
Institute of Animal Science and Pastures
2008-2024
Institute of Animal Sciences
2023
ORCID
2020
Universidade Federal do Rio de Janeiro
2010-2018
Universidade de São Paulo
1999-2010
University of Illinois Urbana-Champaign
2004
Universidade Brasil
2003
Fundação de Estudo e Pesquisa em Medicina Veterinária e Zootecnia
2001
Marfan syndrome is an autosomal dominant disease of connective tissue caused by mutations in the fibrillin-1 encoding gene FBN1. Patients present cardiovascular, ocular and skeletal manifestations, although being fully penetrant, MFS characterized a wide clinical variability both within between families. Here we describe new mouse model that recapitulates heterogeneity humans. Heterozygotes for mutant Fbn1 allele mgΔloxPneo, carrying same internal deletion exons 19–24 as mgΔ model, defective...
ABSTRACT This study evaluated the effects of postpartum diseases and body condition score (BCS) on reproductive performance dairy herds. Cows were monitored during to diagnose changes in BCS. The cows divided into those with no disease one or more diseases. incidence diseases, pregnancy rate (PR) at first service, number days open, percentage pregnant 150d, gestational loss analyzed. No difference was observed between healthy diseased PR service for open. Diseased showed greater 150d higher...
The objective of this study was to evaluate the effects egg yolk and seminal plasma on viability cryopreserved goat semen. To end, four fertile Saanen bucks, aged between 10 months 1 year, weighing 18 25 kg, were used. Semen collected from each buck by artificial vagina method at end breeding season (June-July). extender used citrate, which split into two equal aliquots: 5% (2.5 mL yolk: 47.5 citrate solution) added one samples 10% (5.0 45.0 another. sperm motility vigor after thawing post...
Embryonic stem cells are totipotent derived from the inner cell mass of blastocysts. Recently, development appropriate culture conditions for differentiation these into specific types has permitted their use as potential therapeutic agents several diseases. In addition, manipulation genome in vitro allows creation animal models human genetic diseases and study gene function vivo. We report establishment new lines murine embryonic preimplantation stage embryos 129/Sv mice. Most had a normal...
Abstract The aim of the present study was to evaluate effects zearalenone (ZEA) on reproductive system morphometry, oestrogen (E2) levels and oocyte quality beef heifers. Twenty non‐pregnant purebred Nellore ( Bos indicus ) heifers [age, ≥18 months; initial body weight, 348 ± 30 kg (mean standard deviation)] were used. animals randomly divided into experimental group a control 10 each. Group administered 300 ppb ZEA per os for 98 days, placebo days. administration carried out daily by adding...
This study assessed the feasibility of in vivo embryo production and nonsurgical recovery (NSER) Morada Nova ewes (an endangered native Brazilian breed sheep) subjected to different estrus synchronization and/or superovulation protocols. Ewes received intravaginal sponges soaked with 60 mg medroxyprogesterone acetate (MAP), which were kept place for six (G6; n = 12), nine (G9; or 12 (G12; 12) days. Half each group remained synchronized only (SYNCH) other half was superovulated (SOV) 133...
The objective of this study was to investigate the relationship among functional traits (age at first calving (AFC), interval (CI), reproductive efficiency (RE), total milk yield (TMY), and lactation period (LP)) in Red Sindhi breed through multivariate techniques. For goal, performance data provided by Brazilian Association Zebu Breeders related 560 dairy cattle from 28 different herds Brazil, born 1987 2011, were used. Principal component analysis with correlation matrix used find AFC, CI,...
The present study aimed to correlate the age and weight of Girolando heifers with uterine ovarian development. Sixty between 12 36 months old were weighed subjected ultrasound assessment measure diameters each horn ovaries, monthly. These measures continued until their first ovulation. animals divided, for data analysis, according into five groups: GI (12 14 months), GII (15 18 GIII (19 24 [...]
Resumo: O objetivo deste trabalho foi avaliar os efeitos da doadora, estação do ano, touro e tipo de sêmen, na produção in vitro embriões raça Sindi (Bos indicus). Para isso, avaliaram-se 434 sessões aspiração folicular vivo (OPU), realizadas em 152 doadoras, com a utilização sêmen sexado não 22 touros. Analisaram-se as seguintes variáveis: doadora; idade ano; touro; sêmen; oócitos recuperados; viáveis degenerados; taxas clivagem blastocistos. Observaram-se doadora sobre recuperados,...
The present study examined the in vitro and vivo development of bovine nuclear-transferred embryos. A fetal fibroblast culture was established used as nucleus donor. Slaughterhouse oocytes were matured for 18 h before enucleation. Enucleated fused with fibroblasts an electric stimulus treated cytochalasin D cycloheximide 1 followed by alone 4 h. Reconstructed embryos cultured 7-9 days those which developed to blastocysts transferred recipient cows. Of 191 enucleated oocytes, 83 (43.5%)...
The objective of this study was to evaluate the relationships between preovulatory follicle (POF) and corpus luteum (CL) diameters, POF CL vascular perfusion with progesterone production, ovulation, pregnancy in Nellore cows subjected timed artificial insemination (TAI). (n = 201) were ovulation synchronization later ultrasound evaluation at time (D0) seven days (D7), respectively. Females divided into three categories according [...]
There has been much debate over a direct role for progesterone (P4) in early bovine embryo development. While previous attempts to supplement embryos vitro with P4 produced results that vary and are often contradictory, this may be response of administering at inappropriate times. Therefore, the objective these experiments was determine if could exert effect on developing IVF-derived when administered an appropriate time In Exp. I, 8-cell were randomly allotted treatments: (1) control, CR1aa...
The in vitro and vivo development of mouse morulae after cryopreservation through different methods was examined.The slowfreezing involved an equilibration 1.5M ethylene glycol (EG) cooled at 0.5; 0.7; 1.0 or 1.2ºC/minute.The vitrification a 3 minutes 20% EG 60 seconds solution containing 40% EG, 18% ficoll 10.26% sucrose.The quick-freezing 3M + 0.3M sucrose for 5 2 nitrogen vapor.In all three the straws were thawed air 10 water 25ºC 20 embryos cultured 72 hours to estimate blastocyst...
The aim of this particular study was to test in vitro sperm capacitation protocols, using heparin (100mg/ml) and calcium ionophore (5mM). Propidium iodide carboxifluorescein diacetate (IP/CFDA) a fluorescence microscope as well triple stain (congo red, neutral red Giemsa) Phase contrast were used staining. spermatozoa classified according its viability (alive or dead) acrossome integrity (damaged intact). They considered follows: capacitated damaged); non not damaged) dead group showed ratio...