Abstract: Lighting apparatus for high pressure underwater use are disclosed. In one embodiment the lighting apparatus comprises a housing for withstanding ambient exterior pressure at a depth of approximately 500 feet or more, a transparent pressure bearing window positioned at a forward end of the housing, and a multilayered stack for bearing substantially all of the loading applied to the transparent pressure bearing window at a depth of approximately 500 feet or more disposed in the housing behind the transparent pressure bearing window is disclosed.

Abstract: The present invention provides a class of substituted bicyclooctanes of formula ##STR1## wherein R is a C.sub.2-10 non-aromatic hydrocarbyl optionally substituted by cyano, halo, C.sub.1-4 alkoxy, C.sub.1-4 haloalkoxy or S(O).sub.m R.sup.3 ; R.sup.1 and r.sup.2 are independently hydrogen, halo, a C.sub.1-3 aliphatic group optionally substituted, S(O).sub.m,R.sup.4, or R.sup.1 and R.sup.2 and the carbon atoms to which they are attached form a C.sub.5-7 carbocyclic ring optionally substituted by halo, or a C.sub.1-3 aliphatic or alkoxy group;A-X is a group:(i) A'C.tbd.CX in which A' is a C.sub.3-6 alkyl, alkenyl or alkynyl or a C.sub.3-10 cycloalkyl or cycloalkenyl group all optionally containing one to three hetero atoms.(ii) BX in which B is a group (CH.sub.2).sub.2 O or (CH.sub.2).sub.2 S(O).sub.n or a C.sub.2-6 aliphatic chain optionally containing one or two oxygen or sulphur atoms and/or double bonds and optionally further substituted;X is hydrogen, halo, SiR.sup.5 R.sup.6 R.sup.7 or SnR.sup.5 R.sup.6 R.

Abstract: The present invention provides compounds of the formula (I): ##STR1## wherein R is a phenyl group, substituted fluorine atoms formulations containing them and their use in controlling pest infestation.

Abstract: The present invention provides a class of novel substituted bicyclooctanes which have pesticidal activity, particularly against arthropod pests. Pesticidal formulations containing the compounds of the formula (I), their use in the control of pests and methods for their preparation are also disclosed.

Abstract: Pesticidal bicyclo-octanes are of the formula ##STR1## where R is a substituted or unsubstituted aliphatic or aromatic group, R' and R.sup.3 are H or a substituted or unsubstituted aliphatic or aromatic group, R.sup.2 is a substituted or unsubstituted heterocyclic group containing at least one ring nitrogen and is preferably a 3- or 4- pyridyl group, Z is CH.sub.2 CH.sub.2, CH.sub.2 O--CH.sub.2 S or COCH.sub.2 or CH(OR.sup.5)CH.sub.2 where R.sup.5 is H, alkyl, acyl or carbamoyl at Y and Y' are O or S(O).sub.m where m is 0, 1 or 2.Various methods for their preparation are described.

Abstract: Anti-protozoal 1,2,4-oxadiazole derivatives of the formula ##STR1## where R.sup.1 is hydrogen, lower alkyl, halogen, hydroxy, alkoxy or nitro; each R.sup.2 is the same or different in one or more of the 3,4,5 or 6 positions and is hydrogen, lower alkyl, halogen, hydroxy, aryloxy, alkylthio, arylthio, amino, substituted amino, cyano or nitro or two adjacent groups R.sup.2 together form a residue --CH.dbd.CH--CH.dbd.CH--; or R.sup.1 and one R.sup.2 together form a residue --CH.dbd.CH--CH.dbd.CH--; R.sup.3 is hydrogen, lower alkyl, aryl, substituted aryl or a group Ar SCH.sub.2 - were Ar is an unsubstituted or mono, di-or-tri- substituted phenyl group where the substituents are the same or different; and X and Y together form a bond or are each hydrogen; and acid addition salts thereof, methods for their preparation, formulations thereof and their use in the treatment of protozoal infections are described.

Abstract: Anti-protozoal 1,2,4-oxadiazole derivatives of the formula: ##STR1## wherein R.sup.1 is amino or substituted amino; each R.sup.2 is the same or different in one or more of the 3, 4, 5 or 6 positions and is hydrogen, lower alkyl, halogen, hydroxy, alkoxy, alkylthio, arylthio, amino, substituted amino, cyano or nitro; X and Y together represent a bond or X and Y are both hydrogen; R.sup.3 is hydrogen, lower alkyl, aryl, substituted aryl or ArS.CH.sub.2 --; and Ar is unsubstituted or mono-, di- or tri-substituted phenyl wherein the substituents may be the same of different, and acid addition salts thereof, methods for their preparation, formulations thereof and their use in the treatment of protozoal infections, especially malaria are described.