Visual, vestibular, and auditory neurons rely on ribbon synapses for rapid continuous release and recycling of synaptic vesicles. Molecular mechanisms responsible for the properties of ribbon synapses are mostly unknown. The zebrafish vision mutant nrc has unanchored ribbons and abnormal synaptic transmission at cone photoreceptor synapses. We used positional cloning to identify the nrc mutatio...

The study was conducted to evaluate carcass yield and chemical composition of thigh and breast muscles of broilers fed three different lysine requirement levels: high lysine (+10% NRC), standard (NRC) and low lysine (-10% NRC) and two ways of expressing amino acids in feedstuffs (total or digestible amino acids). The results of this study showed that diet formulation based on digestible amino a...

OBJECTIVES New resin cement (NRC) has been developed as a root repairing material and the material is composed of organic resin matrix and inorganic powders. The aim of this study was to compare the rat subcutaneous tissue response to NRC and mineral trioxide aggregate (MTA) cement and to investigate the tissue toxicity of both materials. MATERIALS AND METHODS Sixty rats received two polyethy...

Abstract This paper describes the collaborative project between National Research Council of Canada (NRC) and Centro Español de Metrología (CEM) for construction comparison high temperature fixed points (HTFPs). A hybrid-type crucible that uses piston method filling has been jointly developed. series 12 point blackbodies (HTFPBBs) have constructed, including Cu, Ru-C, Ir-C, Re-C WC-C covering r...

Energy concentration of gain (EG) is an inherent component in beef cattle feeding systems. The National Research Council (NRC) uses equations based on body weight, rate of gain and cattle type to predict EG and, in turn, to calculate dietary energy requirements. From EG, fat and protein deposition can be calculated directly. A dynamic computer growth model also can be used to estimate EG. In bo...

R. T. Wood, C. E. Antonescu (NRC), S. A. Arndt (NRC), C. L. Britton, S. A. Brown-VanHoozer, J. A. Calvert (NRC), B. Damiano, J. R. Easter (PLS), E. B. Freer, J. E. Hardy, L. M. Hively, D. E. Holcomb, J. M. Jansen, R. A. Kisner, K. Korsah, D. W. Miller (OSU), M. R. Moore, J. A. Mullens, J. S. Neal, V. A. Protopopescu, R. A. Shaffer (NRC), J. C. Schryver, C. M. Smith, R. W. Tucker, R. E. Uhrig, B...

the effect of3levels of methionine (nrc recommended, 5 percent more than nrc recommended and 10 percent more than nrc recommended) and 2 levels of fat (0 and 5 percent) on some economical traits (performance and carcass) of broilers using a 2x3 factorial experiment with completely randomized design based on two rearing stages, starter (0-3 wk) and grower (4-6 wk) was studied. anova of the effec...