Abstract: A water ride for transporting ride participants between portions of a water attraction disposed at different heights, for example, pools situated at various levels in a water leisure park, includes an outer support tube within which a hollow spiral coil (screw) is constructed internally of the tube and securable to the tube. Advantageously, the manner of securement permits removal of at least a portion of the spiral coil as necessary or desirable for performing maintenance and/or replacement. The spiral coil sufficiently engages the inside of the tube, thereby creating at least a restriction to the passage of water between adjacent pockets contained between the thread pitch defined by the spiral coil. Ride participants are moved along with water pockets trapped between the pitch of the internal profile presented by the combination of spiral coil and tube from one end of the tube/spiral coil combination to the other end by rotation of the tube in an appropriate direction.

Abstract: A water ride for transporting ride participants between portions of a water attraction disposed at different heights, for example, pools situated at various levels in a water leisure park, includes an outer support tube within which a hollow spiral coil (screw) is constructed internally of the tube and securable to the tube. Advantageously, the manner of securement permits removal of at least a portion of the spiral coil as necessary or desirable for performing maintenance and/or replacement. The spiral coil sufficiently engages the inside of the tube, thereby creating at least a restriction to the passage of water between adjacent pockets contained between the thread pitch defined by the spiral coil. Ride participants are moved along with water pockets trapped between the pitch of the internal profile presented by the combination of spiral coil and tube from one end of the tube/spiral coil combination to the other end by rotation of the tube in an appropriate direction.

Abstract: A waterslide bowl element has a bottom wall configured to form a throat around a rider exit opening in the bottom of the bowl. The bowl holds an annular ring of water around the throat that slows down and conducts the rider to the exit opening and a flume in which the waterslide ride continues. The waterslide bowl may be used by riders on inner tubes.

Abstract: A waterslide bowl element has a bottom wall configured to form a throat around a rider exit opening in the bottom of the bowl. The bowl holds an annular ring of water around the throat that slows down and conducts the rider to the exit opening and a flume in which the waterslide ride continues. The waterslide bowl may be used by riders on inner tubes.

Abstract: A waterslide bowl element has a bottom wall configured to form a throat around a rider exit opening in the bottom of the bowl. The bowl holds an annular ring of water around the throat that slows down and conducts the rider to the exit opening and a flume in which the waterslide ride continues. The waterslide bowl may be used by riders on inner tubes.

Abstract: A method of preparation of 2,4-diamino-5-benzylpyrimidines involving the reaction of a 2,4-diamino-5-substituted methyl pyrimidine, for example 2,4-diamino-5-hydroxymethylpyrimidine, with an appropriately substituted phenol.

Abstract: Pharmaceutical compositions containing the pteridines of formula (I), ##STR1## wherein R is a lower alkyl group, substituted with one or more halogen atoms, and R.sup.1 and R.sup.2 are the same or different and each is a lower alkyl group or R.sup.1 and R.sup.2, together with the carbon atom in the pteridine ring structure, form a spirocycloalkyl ring system having 4 to 6 carbon atoms outside the pteridine ring structure.The above compositions have bacteriostatic activity.

Abstract: A pharmaceutical formulation of a compound of formula (II') ##SPC1##wherein Y is a lower alkyl group, in association with a pharmaceutically acceptable carrier, as an antibacterial product, and methods involving the preparation and reductive cyclization of a compound of formula (IV) ##SPC2##wherein X is a lower alkyl group or a hydroxymethyl group.

Abstract: Novel pteridines of formula (I), ##SPC1##wherein R is a lower alkyl group, substituted with one or more halogen atoms, and R.sup.1 and R.sup.2 are the same or different and each is a lower alkyl group or R.sup.1 and R.sup.2, together with the carbon atom in the pteridine ring structure, form a spirocycloalkyl ring system having 4 to 6 carbon atoms outside the pteridine ring structure; and their method of preparation.The above compounds have bacteriostatic activity.