FR2569201-A1  BIOTECHNOLOGY AND BIOENNGINEERING, vol. 23, no. 5, mai 1981, pages 1057-1065, John Wiley &amp; Sons, Inc, New York, US; P. SCHERER et al.&quot;Immobilization of the methanogenic bacterium methanosarcina barkeri&quot;;  CHEMICAL ABSTRACTS, vol. 67, no. 11, 11 septembre 1967, page 4734, r f. no. 50570q, Columbus, Ohio, US; V.N. SHVEDOVA: &quot;Isolation of proteolytic enzymes from Cl ostridium sporogenes culture liquid&quot; &amp; Prikl. Biokhim. Mikrobiol. 3(2), 162-7(1967);  CHEMICAL ABSTRACTS, vol. 84, no. 3, f vrier 1976, page 318, r f. no. 29216v, Columbus, Ohio, US; &amp; JP - A - 75 111 283 (CHICHISUI CO., LTD) 01.09.1975;  CHEMICAL ABSTRACTS, vol. 97, no. 9, 30 ao t 1982, page 499, r f. no. 70782h, Columbus, Ohio, US; E.A. BONCH-OSMOLOVSKAYA et al.: &quot;Methane production from pectin in a combined culture of Clostridium pectinofermentans and Methanosarcina vacuolata&quot; &amp; MIKROBIOLOGIYA 1982, 51(3)), 413-15;  CHEMICAL ABSTRACTS, vol. 98, no. 13, 28 mars 1983, page 336, r f. no. 104106d, Columbus, Ohio, US; E. NAUMANN et al.: &quot;Betaine: new oxidant in the Stickland reaction and methanogenesis from betaine and L-alanine by a Clostridium sporogenes-Methanosarcina barkeri coculture&quot; &amp; APPL. ENVIRON. MICROBIOL. 1983, 45(2), 474-83FR2569201-A  BIOTECHNOLOGY AND BIOENNGINEERING, vol. 23, no. 5, mai 1981, pages 1057-1065, John Wiley &amp; Sons, Inc, New York, US; P. SCHERER et al.&quot;Immobilization of the methanogenic bacterium methanosarcina barkeri&quot;;  CHEMICAL ABSTRACTS, vol. 67, no. 11, 11 septembre 1967, page 4734, r f. no. 50570q, Columbus, Ohio, US; V.N. SHVEDOVA: &quot;Isolation of proteolytic enzymes from Cl ostridium sporogenes culture liquid&quot; &amp; Prikl. Biokhim. Mikrobiol. 3(2), 162-7(1967);  CHEMICAL ABSTRACTS, vol. 84, no. 3, f vrier 1976, page 318, r f. no. 29216v, Columbus, Ohio, US; &amp; JP - A - 75 111 283 (CHICHISUI CO., LTD) 01.09.1975;  CHEMICAL ABSTRACTS, vol. 97, no. 9, 30 ao t 1982, page 499, r f. no. 70782h, Columbus, Ohio, US; E.A. BONCH-OSMOLOVSKAYA et al.: &quot;Methane production from pectin in a combined culture of Clostridium pectinofermentans and Methanosarcina vacuolata&quot; &amp; MIKROBIOLOGIYA 1982, 51(3)), 413-15;  CHEMICAL ABSTRACTS, vol. 98, no. 13, 28 mars 1983, page 336, r f. no. 104106d, Columbus, Ohio, US; E. NAUMANN et al.: &quot;Betaine: new oxidant in the Stickland reaction and methanogenesis from betaine and L-alanine by a Clostridium sporogenes-Methanosarcina barkeri coculture&quot; &amp; APPL. ENVIRON. MICROBIOL. 1983, 45(2), 474-83