342

4675298

PETRI DISH

PATENT ABSTRACTS

Gerhard Brusewitz, Bergisch Gladbach, Federal Republic Of Germany assigned to Madaus & Co

The present invention provides a Petri dish, especially for culturing micro-organisms, com- prising a circular lower dish and a cover loosely laid thereon. Projections are formed provided on the periphery of the inner surface of the cover and, matching depressions are formed on the rim of the lower dish. This permits adjusting a gap between the cover and dish for control of gas ex- change between the interior of the Petri dish and the atmosphere.

(from about 1500 to about 12.000 1.U. m2) and a nonionic surfactant (frOm about 5 and up to. but less than 11 g/m2). The use of these ranges of rea- gents reduces the potential for interference by triglycerides present in a test sample. Total cholesterol is determined with this element by detection of a color change resulting from a series of enzymatic reactions which produce hydrogen peroxide.

4680263

C O N T I N U O U S A L C O H O L M A N U F A C T U R I N G P R O C E S S

U S I N G I M M O B I L I Z E D M I C R O O R G A N I S M

4676956

A P P A R A T U S F O R P H O T O S Y N T H E S I S

Kei Mori, Tokyo. Japan

An apparatus for photosynthesis includes a uni- que arrangement for supplying light and CO2- containing air to a reaction chamber in a sure and stable manner. The reaction chamber is ir- radiated for photosynthesis from the inside and~or outside thereof in an intermittent mode. CO2-containing air is routed from a CO2 source to a rotatable disc which is positioned in a bot- tom portion of the apparatus. Part of the CO2- containing air is ejected sideways from the disc to cause it into rotation, while the rest of the air is ejected upwardly into the reaction chamber. The reaction chamber is partitioned into a plurality of compartments which are sequentially sup- plied with the CO2-containing air in accordance with the rotation of the disc,

4680259

A N A L Y T I C A L E L E M E N T A N D M E T H O D F O R C O L O R I M E T R I C

D E T E R M I N A T I O N O F T O T A L C H O L E S T E R O L

Peter E Cumbo, Robert F Fricker assigned to Eastman Kodak Company

An analytical element is designed for the colorimetric determination of total cholesterol in aqueous liquids, such as biological fluids. This element comprises an absorbent material and critical amounts of cholesterol ester hydrolase

Tomiak Yamada. Masuo Kamihonoki, Hiroshi Sagara, Hiroshi Umino, Yokohama, Japan as- signed to New Energy Development Organiza- tion: JGC CorporationSanraku-Ocean Co Ltd

A feed liquid (sugar-containing liquid) is con- tinuously fed to a fermenter packed with an im- mobilized microorganism, which is obtained by immobilizing an alcohol producing micro- organism on a carrier, for alcohol fermentation. The fermentation liquid is continuously taken out of said fermenter and is heated to a tempera- ture of 35£20 +0 to 80+20 +0 C. This liquid is introduced into a flash tank maintained at reduced pressure and is divided into an alcohol- containing steam and a liquid. The alcohol- containing steam is condensed and recovered as alcohol, while the separated liquid is cooled and is cycled back to said fermenter,

4 6 8 0 2 ~

C E L L C U L T U R E C H A M B E R W I T H M E A N S F O R A U T O M A T I C

R E P L E N I S H M E N T O F N U T R I E N T

Alexander Tschopp, Claudy-Gabriell Gruenblat-Nordau, Beat Huber, Augusto Cogoli, Zswitzerlana assigned to Contraves AG

The apparatus which includes a cell culture chamber enables cell biological experiments with botanical, zoological or homological cells to be carried out. The apparatus comprises a pump housing and a cell culture block with a cell cul- ture chamber therein in which the cell culture medium or nutrient can be automatically and continually exchanged by the action of an os- motic fluid pump connected to the chamber. The osmotic fluid pump is activated by a fluid filled