The invention concerns methods of extracting crude oil from oil wells and aims to improve their productivity. The method involves lowering the pressure in the well until a point is reached where the productivity coefficient increases sharply.

BCRF1 proteins, and expression vectors for producing them, are provided for treating conditions associated with excessive production of IFN- gamma . Compositions of the invention containing BCRF1 proteins are useful in treating a variety of disorders, including allergy, psoriasis, tissue rejection, and MHC-linked autoimmune diseases.

PCT No. PCT/GB93/01259 Sec. 371 Date Feb. 23, 1995 Sec. 102(e) Date Feb. 23, 1995 PCT Filed Jun. 17, 1993 PCT Pub. No. WO94/00278 PCT Pub. Date Jan. 6, 1994An apparatus for shaping perforations of sheet material which comprises a first mold structure at one side of the sheet material and a complementary mold structure at the other side of the sheet material to cooperate with the first mold structu...

Recombinant tropoelastins and variants of recombinant tropoelastins produced from synthetic polynucleotides, as well as the synthetic polynucleotides themselves are provided. Also provided are cross-linked elastins or elastin-like products prepared from the tropoelastins or variants.

The security tag used for detecting the presence of the tag within a surveilled area utilises electromagnetic energy at a frequency within a predetermined detection frequency range. It includes a dielectric substrate having two opposing principle surfaces and a resonant circuit capable of resonating at a frequency within the predetermined detection frequency range. The resonant circuit includes an...

The present invention relates to a process for continuous gas-phase polymerization of olefin(s) in a fluidized and/or mechanically stirred bed reactor, comprising a stage of drawing off the polymer out of the reactor, wherein a portion of the bed is transferred into a lock hopper and is then isolated from the reactor in the lock hopper for a period of 5 to 120 seconds so that a substantial amount ...

The present invention relates to an apparatus for gas phase polymerisation of olefins(s), essentially comprising a fluidized bed reactor and at least one conduit for drawing off polymer provided with an isolation valve and connecting the vertical side wall of the reactor to a lock hopper, the said conduit leaving the vertical side wall of the reactor while being directed downwards so that each par...