EVALUATION OF FROZEN SEMEN BY A CROSOMAL INTEGRITY AND SPERM CONCENTRATION - TWO VITAL QUALITY PARAMETERS OF MALE FERTILITY IN BOVINES

Acrosomal integrity and sperm concentration are two important parameters to assess the quality of frozen semen doses which in terms validates the fertilizing capacity and conception rate. The present study was undertaken to evaluate acrosomal integrity by Giemsa’s stain and sperm concentration of FSS using improved neubauer chamber in Exotic pure Jersey, Crossbred Jersey, Indigenous Gir cattle and Indigenous Murrah buffalo prior to the field use. The overall values of Giemsa’s stain were observed as 73.74±0.31, 18.65±0.33 and 7.79±0.25 percent for Intact Acrosome, Partially Damaged Acrosome and Fully Damaged Acrosome, respectively. Overall values of sperm concentration were 21.98±0.28 million per straw. The study indicated that there was no significant difference (P<0.05) among the breeds and the values mostly correlates with the guideline of Minimum Standard Protocol for Production of bovine semen, 2012 of Govt. of India

Dynamic Behavior Due to an Eccentrically Applied Lateral Vibration of a Model Bridge With Rigid and Elastomeric Bearings

In this investigation a comparative study is made of the dynamic behavior of rigid and elastomeric bearings of a model bridge subjected to eccentric vibratory loading. Bor the experimental portion, static and vibration tests were conducted using an approximate one-third scale model bridge 25 ft long and 10 ft wide, with a composite section of steel girders and concrete bridge deck slab. A counterrotating eccentric weight oscillator was used to produce oscillatory loads on the bridge. Tests were conducted with three types of bearing conditions: curved steel sole plates, 64 durometer and 49 durometer hardness neoprene pads. A theoretical analysis was also made and the values obtained for natural frequencies and deflections were compared with those obtained experimentally. Some of the conclusions are: (a) for a statically applied load the total midspan deflection is greater for neoprene than steel supports; (b) neoprene bearing pads add to the damping of the bridge; (c) in general, though not always, the maximum strain and also the total and the net deflection /\u27 in the girders, at the respective natural frequency for each bearing condition, are greater for steel bearings; (d) the dynamic stress and deflection, and also their amplification factors, of a loaded bridge are less than those of an unloaded bridge; (e) at low and high frequencies the magnitudes of strain and deflection are quite close for different bearing conditions

A convenient one-pot access to <i>N</i>-substituted pyrroles from nitro benzenes under neat aqueous conditions

1112-1116A practical and straightforward one-step procedure for the synthesis of N-functionalized pyrroles via reductive cyclization is described. The simple one-pot reaction is carried out by treating various substituted nitro benzenes with readily available building blocks 2,5-dimethoxytetrahydrofuran or γ-diketone in the presence of SnCl2 under aqueous conditions at 55°C

Estimation of error in approximate numerical integration near a simple pole using Chebyshev points

summary:In this note quadrature formula with error estimate for functions with simple pole is discussed. Chebyshev points of the second kind are used as the nodes of integration