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...

Aim: The experiment was conducted to study the total seminal plasma protein (TSPP) and heparin-binding proteins (HBPs) in relation to initial semen quality of buffalo bull. Materials and Methods: Semen from two Murrah buffalo bulls (bull no. 605 and 790) with mass motility of ≥3+ were used for the study and categorized into three groups (Group IMass motility 3+, Group IIMass motility 4+ and Gro...

Treatment of obsessive-compulsive-bipolar comorbidity is relatively challenging. This case report presents the improvement of both obsessive-compulsive and mood symptoms in a female patient treated with risperidone plus valproate. Her obsessivecompulsive and manic symptoms, as assessed respectively by using The Yale-Brown Obsessive-Compulsive Scale (Y-BOCS) and Young Mania Rating Scale (YMRS), ...

chromosomal appearance of 12 holstein bulls selected for artificial inseminations were examined bysister chromatid exchanges (sces). for differential staining of sister chromatids bromodeoxyuridine (brdu)was inoculated in lymphocyte cultures. the mean, maximum and minimum number of sce per cell weredetermined 6.8 ± 1.14, 8.3 ± 1.1 and 5.7 ± 1.5, respectively. sce frequencies of all animals were...

Staff Reporters of THE WALL STREET JOURNAL After Friday's 30-point swoon in the Dow Jones Industrial Average, it's time for a stock market checkup . The market ran hard and high for six weeks. And there isn't any reason to think there aren't more gains ahead this year and maybe next year, many analysts say . But just as you don't keeping tooling down the highway in your car without occasionally...

Selection or replacement of a herd bull is an important decision for cow-calf producers. To justify the price paid for a bull, cattlemen may utilize several criteria. They must also determine if the specific selection criteria used add or detract from the value of a particular animal. The study reported here evaluated 13 years of data presented to bull buyers at a graded bull auction in Florida...