Abstract: A payload loaded into a chamber is cycled to a low temperature of about -320.degree. F. using liquid nitrogen fed to a heat exchanger evaporator that is located at the top of the chamber so that gaseous nitrogen vapor from the evaporator, at substantially the same temperature as the liquid nitrogen, is circulated to a payload in the chamber below, and, at the same time, gas from the chamber is circulated upward to highly thermally conductive fins on the heat exchanger that are cooled by the liquid nitrogen evaporation. Thus, heat from the payload is fed from the gas circulating upward to the heat exchanger to evaporate the liquid nitrogen and so the payload located at the bottom of the chamber is cooled by gas kinetics and is never touched by the liquid nitrogen.

Abstract: A combination collar and muzzle is used as a humane method of restraining, controlling, and achieving obedient behavior of animals, dogs in particular. A collar member or loop encircles the neck immediately behind the ears, and a second muzzle loop encircles the upper and lower jaws of the animal to form a type of a figure eight combination collar and muzzle. The two loops are coupled together with a ring behind the jaw. The muzzle loop is adjustable in length. An optional adjustable keeper strap is connected between the collar loop and the muzzle loop to retain the muzzle loop from being pawed off.

Abstract: A combination collar and muzzle is used as a humane method of restraining, controlling, and achieving obedient behavior of animals, dogs in particular. A collar member or loop encircles the neck immediately behind the ears, and a second muzzle loop encircles the upper and lower jaws of the animal to form a type of a figure eight combination collar and muzzle. The two loops are coupled together with a ring behind the jaw. The muzzle loop is adjustable in length. An optional adjustable keeper strap is connected between the collar loop and the muzzle loop to retain the muzzle loop from being pawed off.

Abstract: .gamma.-Thiobutyrolactone derivatives having short chain .alpha.- and/or .gamma.-alkyl or alkenyl substituents have useful anticonvulsant properties.

Abstract: A combination collar and muzzle is used as a humane method of restraining, controlling, and achieving obedient behavior of animals, dogs in particular. A collar member or loop encircles the neck immediately behind the ears, and a second loop encircles the upper and lower jaws of the animal to form a type of a figure eight combination collar and muzzle. The two loops are coupled together with a ring behind the jaw. The loops are slidably connected so that when a leash is attached to the portion of the muzzle loop extending out from the connecting ring it will slide easily and at the same time will exert a downward pressure on the neck immediately behind the ears. Pressure is thus simultaneously applied to nerves and muscles tending to control the dog humanely and without choking or applying pressure to the trachea and larynx.