192

containing sodium chloride at a concentration of about 3M or above, wherein the algal suspension is contacted with an adsorbent having a hydro- phobic surface so as to adsorb the algae thereon, and the adsorbent with the algae adsorbed thereon is separated from the brine, beta- carotene and other useful cell components may be extracted from the adsorbed algae by treat- ment with a suitable solvent.

4556073

P R O C E S S F O R R E D U C T I O N O F N I T R A T E C O N T E N T O F

T O B A C C O BY M I C R O B I A L T R E A T M E N T

PATENT ABSTRACTS

4559301

P R O C E S S F O R P R E P A R I N G M A C R O C I N D E R I V A T I V E S

Jan R Turner. Veronica Krupinski. David S Fukuda. Richard H Bahz assigned to Eli Lilly and Company

New macrocin and lactenocin ester derivatives of the formula: See Potent lbr Chemical Struc- ture wherein R is formyl or hydroxymethyk R I is hydrogen, acetyl or propionyl: R2 is hydrogen or See Patent Jor Chemical Structure and R3 is hydrogen, acetyl, propionyl, n-butyryl or isovaleryl: provided that one of R1 or R3 must be other than hydrogen: and the acid addition salts thereof; prepared by bioconversion of macrocin or lactenocin with an acylating enzyme system produced by Streptomyces thermo- tolerans strains, have improved activity against Mycoplasma species.

Lawrence Gravely, Vernon Geiss, Charles Gregory assigned to Brown & Williamson Tobacco Corporation

A process for the reduction of the nitrate content of tobacco materials by microbial treatment is disclosed wherein tobacco materials are sub- jected, under controlled conditions, to the action of a microorganism effective to degrade nitrates through a biochemical reaction. Tobacco materials treated in accordance with this pro- cess, when incorporated into a tobacco smoking product, produce a mild smoke having reduced nitrogen oxides and hydrogen cyanide deliveries without loss of desirable flavor, taste or other smoking properties.

4559313

R E M O V A L O F I N O R G A N I C C O N T A M I N A N T S F R O M

C A T A L Y S T S

Allan S Myerson, William R Ernst assigned to Georgia Tech Research Institute

Spent catalysts containing metal impurities are treated by a process comprising treating the spent catalyst with a solution containing ox- idizing ferric ion andor oxidizing bacteria, thereby freeing said spent catalyst of said metal impurities.

4556430

PROCESS FOR HYDROLYSIS OF BIOMASS

Alvin O Converse, Hans E Grethlein assigned to Trustees of Dartmouth College

A process for hydrolysis of biomass wherein the biomass is mixed with a small amount of an aqueous acid to produce a wet meal. A non- aqueous carrier fluid is used to form a slurry of the biomass, and the temperature and pressure are established at appropriate levels to effect hydrolysis of the biomass to decomposition pro- ducts that include sugar for a time period that is sufficient for the hydrolysis to occur.

4560656

P R O D U C T I O N O F G A M M A - D E C A L A C T O N E

Mohamad 1 Farbood, Brian J Willis assigned to Fritzsche Dodge & Olcott lnc

Optically active gamma-decalactone is pro- duced by culturing a microorganism capablc of hydrolyzing castor oil and effecting beta- oxidation of the resulting hydrolysate in the pre- sence of castor oil or castor oil hydrolysate and a co-oxidant. The resulting gamma- hydroxydecanoic acid is [actonized to form gamma-decalactone.