Abstract: A chromatographic packing useful for the separation of oligonucleotides is disclosed. The packing includes an insert porous support particle and a silane bonded phase comprising a weak anion exchange group in close proximity to at least one polar non-ionic group.

Abstract: A passive device for automatically feeding a candle to a fixed support ring is mounted upon a base member. A lower drive ring is urged upwardly to force the candle against the fixed support ring by a weight ring. The weight ring is linked to the lower drive ring by flexible linkages which are looped over plural pulley-like guideways secured to the fixed suport such that the weight of the ring urges the candle upwardly. The upward movement of the candle ceases when the candle is burned out and the lower drive ring engages the fixed support ring.

Abstract: An ice barrier for the wet storage of boats is formed of a plurality of notched, elongated elements bridled about a boat hull at waterline. These elements are compressible and their outside surfaces form a V-type groove parallel to and located at the boat's waterline. In this manner, forming ice engages the elements in the notched regions and tends to lock them at that level so that they are not easily dislodged from their protective position. Any movement of the elements with the natural rocking of the boat, cooperating with the notch, aids in breaking the ice.

Abstract: An anti-cavitation semi-cylindrical shroud and rudder combination is described which attaches to the transom of a boat so as to partly enclose a propeller which extends rearwardly of the boat. The axis of the propeller is selected to provide a line of thrust which intersects the approximate center of hull resistance to provide more stable running characteristics. The shroud itself encompasses about 37% of the periphery of the propeller and the lower edges of its side skirt portions lie in a plane which is parallel to the keel of the boat. The configuration of the shroud is such that it conforms to the bottom hull configuration at the front end and shrouds the propeller at the rear end. The shroud itself is configured to provide minimal flow resistance to the water.Yoke-mounted flanking rudders are pivoted ahead of the center of area of the rudder with the center of area of the rudders lying approximately in the fore and aft plane of the propeller. This facilitates turning particularly at low speeds.