Abstract: A rigid mount orbitor sprinkler assembly incorporates a deflector plate configuration that is configured for both spinning/rotating motion as well as orbital or wobbling motion around the center of a spool assembly. The sprinkler incorporates structure to reduce drool that may fall in a concentrated area below the sprinkler and to prevent debris from sandy water or the like from accelerating sprinkler component wear. With reduced vibration, the assembly may be rigidly mounted on a center pivot or other supporting structure while achieving the advantages associated with wobbling and rotating sprinkler assemblies.

Abstract: Structurally-defined, low molecular weight oligomers and preparation thereof which are active in the protection of oxidative physphorylation of mitochondria and exhibit ionophoretic activity. Said structurally defined low molecular weight oligomers are synthesized using a modified 15-dehydro PGB.sub.1 such as 16,16-dimethyl-15-dehydro prostaglandin B.sub.1 as a precursor to obtain oligomeric mixtures which are structurally defined and active in the protection of oxidative phosphorylation and exhibit ionophoretic activity. Synthesis of modified 15-dehydro-PGB.sub.1 ; 16,16-dimethyl-15-dehydro-prostagalandin B.sub.1 ; is also described.

Abstract: A method for oligomerization of a group of prostaglandin analogs such as Ethyl Analog 3-(trans-3-keto-1-pentenyl)-2-ethyl-2-cyclopentenone into a biologically active exhibiting protection of oxidative phosphorylation of degenerated mitochondria and sodium bicarbonate soluble oligomeric mixtures is described. The Ethyl Analog is treated with ethanolic potassium hydroxide solution with exposure to atmospheric oxygen at moderate conditions of temperature, time and concentration.

Abstract: A method for oligomerization of a group of prostaglandin analogs such as Ethyl Analog 3-(trans-3-keto-1-pentenyl)-2-ethyl-2-cyclopentenone into a biologically active exhibiting protection of oxidative phosphorylation of degenerated mitochondria and sodium bicarbonate insoluble oligomeric mixtures is described. The Ethyl Analog is treated with ethanolic potassium hydroxide solution in an oxygen-free atomsphere at moderate conditions of temperature, time and concentration.

Abstract: Prostaglandin analogs and process for the preparation thereof as precursors or the synthesis of oligomeric mixtures exhibiting biological activity for protection of oxidative phosphorylation of degraded mitochondria. The analogs have the general formula: ##STR1## synthesized by O-alkylating a 2-alkylcyclopentane-1,3-dione to form an enol ether, reacting the ether with CH.sub.2 .dbd.CHMgBr to form a vinyl, oxidizing the vinyl with OsO.sub.4 and NaIO.sub.4 to form an aldehyde, and reacting the aldehyde with a sodium salt of dimethyl (2-oxoalkyl)phosphonate.