Sperm acrosomes contain hyaluronidase, the amount varying, respectively, from ram, rabbit, bull, human, boar, rat, and stallion sperm to rooster sperm that do not possess this enzyme. Hyaluronidase was partially purified from bull sperm acrosomal extracts by DEAE-cellulose chromatography. Bull sperm acrosomal hyaluronidase has an optimum pH of 3.75 and is not effected by freezing and thawing or...

3. Arch. d'Ophtal., Vol. LIII, p. 166, 1936. 4. WEEKERS, L. and FANCHAMPS, J.-Arch. d'Ophtal., Vol. I, p. 585. 1937. 5. WEEKERS, L.-Bull; Soc. Ophtal , Paris. Nancy, 16 juin, sdance consacr6e au traitement mddical du glaucome. 1939. 6. WEEKERS, L. and BONHOMME, F.-Obhthalmologica, Vol. XCIX, p. 180, 1940. 7. WEEKERS, L.-Bull. Soc. belge d'O5htal., fdvrier, 1948. 8. WEEKERS, R. and HEINTZ, A.-Bu...

The bull is a graph consisting of a triangle and two pendant edges. A graph is called bull-free if no induced subgraph of it is a bull. This is the last in a series of three papers. In this paper we use the results of [1, 2] and give an explicit description of the structure of all bull-free graphs.

Shelter staff and veterinarians routinely make subjective dog breed identification based on appearance, but their accuracy regarding pit bull-type breeds is unknown. The purpose of this study was to measure agreement among shelter staff in assigning pit bull-type breed designations to shelter dogs and to compare breed assignments with DNA breed signatures. In this prospective cross-sectional st...

The bull is the graph consisting of a triangle and two disjoint pendant edges. A graph is called bull-free if no induced subgraph of it is a bull. This is the first paper in a series of three. The goal of the series is to explicitly describe the structure of all bull-free graphs. In this paper we study the structure of bull-free graphs that contain as induced subgraphs three-edge-paths P and Q,...

the aim of this study was to determine the effects of the antioxidants superoxide dismutase (sod),glutathione peroxidase (gpx) and butylated hydroxytoluene (bht) on microscopic semen parameters andlipid peroxidation following the freeze-thawing of bull semen. ejaculates were collected from five holsteinbulls and pooled at 37°c. the semen samples were diluted with a cey extender containing addit...

The bull is a graph consisting of a triangle and two vertex-disjoint pendant edges. A graph is called bull-free if no induced subgraph of it is a bull. A graph G is perfect if for every induced subgraph H of G, the chromatic number of H equals the size of the largest complete subgraph of H. This paper describes the structure of all bull-free perfect graphs.

The bull is a graph consisting of a triangle and two pendant edges. A graph is called bull-free if no induced subgraph of it is a bull. This is a summary of the last two papers [2, 3] in a series [1, 2, 3]. The goal of the series is to give a complete description of all bull-free graphs. We call a bull-free graph elementary if it does not contain an induced three-edge-path P such that some vert...