152 reported theformation of highly branched (âhyperbranchedâ) polyethyl-ene at low pressure by a so-called âchain walkingâ processusing palladium(II) and nickel(II) catalysts, which containedvery bulky chelating diimine ligands (see Scheme 44).
Stallions follow the conformation and phenotype of their breed, but within that standard, the presence of hormones such as testosterone may give stallions a thicker, cresty neck, as well as a somewhat more muscular physique as compared to female horses, known as mares, and castrated males, called geldings.illies usually soon join a different band with a dominant stallion different from the one that sired them. Colts or young stallions without mares of their own usually form small, all-male, bachelor bands in the wild. Living in a group gives these stallions the social and protective benefits of living in a herd.
There are many more terms used to describe male horses than females because they not only indicate the gender and age of the horse but can also reveal whether they are fathers, if they've been castrated or not and if they have developed and matured properly. Colts are those male horses who are less than 4 years old. When they turn 4, male horses become stallions -- unless they are castrated. Male horses who are altered are referred to as geldings. If a horse has fathered a baby, he's called a sire. Another term used to describe male horses is rig, which refers to a male horse who either hasn't been castrated properly or has one or two undescended testicles.