ISSN:0006-3592    

DOI:10.1002/bit.260090102

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1967

数据来源: WILEY

ISSN:0006-3592    

DOI:10.1002/bit.260090103

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1967

数据来源: WILEY

摘要:

AbstractMicroorganisms have been found which concomitantly convert hydrocarbons, selected naphthenic acids, and atmospheric nitrogen into cellular substance. Bacteria are included in the generaPseudomonas, Mycobacterium, andAzotobacter. Carbon sources utilized include the hydrocarbons methane,n‐butane,n‐tetradecane, toluene, and a naphthenic acid, cyclohexane‐carboxylate. Uptake of isotopic nitrogen was employed as a criterion of nitrogen fixation. The results indicate a rather wide prevalence in nature of hydrocarbon‐oxidizing bacteria capable of fixing atmospheric nitrogen. Their occurrence helps explain the high concentration of organic nitrogen commonly found in soils exposed to gas leakage from pipelines or natural‐gas seeps, and suggests further consideration of the possibility of applying selected petroleum residua to soils in order to increase the agricultural potential by nitrogen‐fixin

ISSN:0006-3592    

DOI:10.1002/bit.260090104

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1967

数据来源: WILEY

摘要:

AbstractThe bacterial degradation of catechol, 3‐methylcatechol, 2,3‐dihydroxy‐β‐phenylpropionic acid, and protocatechuic acid has been studied in detail. From the results obtained a general sequence has been proposed for the microbial oxidation of dihydroxy aromatic c

ISSN:0006-3592    

DOI:10.1002/bit.260090105

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1967

数据来源: WILEY

摘要:

AbstractThe production ofL‐glutamic acid from hydrocarbons by a newly isolated bacterium, which was identified asCorynebacterium, was investigated. The outstanding characteristic of this bacterium was found to be an accessory requirement of thiamine for growth. The optimum concentration of thiamine for growth was 50 μg./liter, while that forL‐glutamic acid production was 3–5 μg./liter.n‐Paraffins ranging from dodecane to heptadecane were best forL‐glutamic acid production, and about 5 g. ofL‐glutamic acid were obtained from 30 g. of these individualn‐paraffins. On the other hand, a tracer experiment using oxygen‐18 revealed that molecular oxygen was incorporated intoL‐glutamic acid produced from dodecane. Based on the incorporation value of molecular oxygen inL‐glutamic acid, a hypothetical pathway for the biosynthesis ofL‐glutamic acid from

ISSN:0006-3592    

DOI:10.1002/bit.260090106

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1967

数据来源: WILEY

ISSN:0006-3592    

DOI:10.1002/bit.260090107

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1967

数据来源: WILEY

摘要:

AbstractFrom soil and from the plantElodea, we have isolated an organism which has not, yet been identified; it is a comparatively largeBacillus, which thriven in a medium of mineral salts saturated with a gaseous mixture of 40%, methane (or natural gas), 40% oxygen, 15% nitrogen, and 5% carbon dioxide. The isolated cells have amino acid and vitamin contents comparable to, or, in some cases greater than, those found in such nutrients as yeast, fish meal, or milk solids.

ISSN:0006-3592    

DOI:10.1002/bit.260090108

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1967

数据来源: WILEY

摘要:

AbstractAlthough air‐lift fermentors have been employed industrially and in the laboratory, little information has been published on the effects of design on performance. With respect to both liquid circulation and mass transfer, not only the actual rates but the efficiency in relation to power consumption is strongly influenced by lift height and diameter, submergence ratio, and air‐flow rate. Relatively wide tubes, operating at high submergence ratios and rather low air‐flow rates favor high efficiency. Since these conditions lead to rather low absolute values of circulation and mass‐transfer rates, the microbial population which can be supported will also be rather small. Mass transfer can be increased by the insertion of an orifice some distance; above the air‐inlet point and by suitable arrangement of the discharge from the air lift into the headspace of the

ISSN:0006-3592    

DOI:10.1002/bit.260090109

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1967

数据来源: WILEY

ISSN:0006-3592    

DOI:10.1002/bit.260090110

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1967

数据来源: WILEY

ISSN:0006-3592    

DOI:10.1002/bit.260090111

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1967

数据来源: WILEY