Abstract: The present invention relates to soil agitation, and in particular to machines which are used to dig decompacted soil and agitate the turf on sporting greens, such as golf greens and football fields. The present invention in particular presents a new type of blade for the soil agitation device, the blade being mountable to a soil agitation device and having a leading cutting edge which presents a shallow angle of attack to the soil. The leading edge slopes away from the top part of the blade at an angle to the horizontal which is preferably in between 15.degree.-35.degree.. The blade preferably mounts "bullets", protruberances from the side of the blade, which assist in decompaction of the soil. These bullets are mounted in between the top and bottom of the blade, which is different from the prior art blades, which are mountable to the bottom of the blade.

Abstract: Tricyclic compounds of formula (I) ##STR1## wherein X.sup.1 is a carboxyl or 5-tetrazolyl groupX.sup.2 is carbonyl or methyleneX.sup.3 is hydroxyl or a group --X.sup.4 (C.sub.n H.sub.2n)X.sup.5whereX.sup.4 is oxygen or sulphurX.sup.5 is hydrogen or a group --OX.sup.6whereX.sup.6 is hydrogen, alkanoyl of 1 to 4 carbon atoms or a group --(C.sub.m H.sub.2m)X.sup.7whereX.sup.7 is hydrogen or a group --OX.sup.8whereX.sup.8 is hydrogen or alkanoyl of 1 to 4 carbon atoms and m and n are each, independently, an integer from 1 to 4, together with salts thereof,provided that when X.sup.5 is a group --OX.sup.6 then n is always greater than 1 and X.sup.4 and X.sup.5 are attached to different carbon atomsand that when X.sup.7 is a group --OX.sup.8 then m is always greater than 1 and no single carbon atom in the radical --(C.sub.m H.sub.2m)-- is attached to two oxygen atoms.

Abstract: Use of compounds of formula (I) ##STR1## to provide a more effective delivery of oxygen to the tissues of a mammalian, including human, recipient.In vivo applications include the relief or amelioration of conditions wherein there is tissue hypoxia; in vitro the compounds are of use in the storage of mammalian, including human, red blood cells to maintain their oxygen-delivery capacity and prolong their useful storage life.Also provided is a sterile, sealed vessel containing an anticoagulant, a non-toxic amount of a compound of formula (I) and optionally mammalian, in particular human, red blood cells.

Abstract: A turf aerating machine including a plurality of tyne arms, having tynes attached to their lower ends, and extending substantially vertically downwardly from the cranks of a crankshaft located transversely of the direction of travel of the aerator. A drive linkage connects the crankshaft to the power take-off of the tractor or other power source and is driven such that, as the aerator is moved forward, the crankshaft moves with the lower arc of its rotation in the rearward direction. The tyne arms are projected into the ground as the respective crank moves through its lower arc and they are lifted clear of the ground as the crank moves through the upper arc of its travel. While the tynes are engaged with the ground, the tyne arm is maintained in a substantially vertical orientation by the rearward motion of the respective crank through the lower arc of its rotation.

Abstract: Use of compounds of formula (I) ##STR1## to provide a more effective delivery of oxygen to the tissues of a mammalian, including human, recipient.In vivo applications include the relief or amelioration of conditions wherein there is tissue hypoxia; in vitro the compounds are of use in the storage of mammalian, including human, red blood cells to maintain their oxygen-delivery capacity and prolong their useful storage life.Also provided is a sterile, sealed vessel containing an anticoagulant, a non-toxic amount of a compound of formula (I) and optionally mammalian, in particular human, red blood cells.

Abstract: Use of compounds of formula (I) ##STR1## to provide a more effective delivery of oxygen to the tissues of a mammalian, including human, recipient.In vivo applications include the relief or amelioration of conditions wherein there is tissue hypoxia; in vitro the compounds are of use in the storage of mammalian, including human, red blood cells to maintain their oxygen-delivery capacity and prolong their useful storage life.Also provided is a sterile, sealed vessel containing an anticoagulant, a non-toxic amount of a compound of formula (I) and optionally mammalian, in particular human, red blood cells.