Effet de la température d'incubation sur la composition lipidique de Corynébacteriacées du genre Arthrobacter

1982 ◽  
Vol 28 (3) ◽  
pp. 284-290 ◽  
Author(s):  
N. Canillac ◽  
M. T. Pommier ◽  
A. M. Gounot
Keyword(s):  
Fatty Acids ◽  
Growth Temperature ◽  
Lipid Composition ◽  
The Other ◽  
Short Chain ◽  
Optimum Growth ◽  
Optimum Growth Temperature

Lipid composition of three Arthrobacter strains (mesophilic, psychrotrophic, and psychrophilic strains) grown at their optimum growth temperature was studied. Great differences appeared only in the nature of their fatty acids: the psychrophilic strain synthesized less linear acids, C17 acids, and more iso isomers than the other two strains.Incubation of the three strains at temperatures below their optimum resulted in variations only in proportion of the different fatty acids: increase of the ratio of unsaturated, of branched, and of short-chain fatty acids.The relation between lipid composition and ability to grow at temperatures around 0 °C is discussed.

The growth of aerobic spore-forming bacilli in sterilized milk

1960 ◽  
Vol 27 (2) ◽  
pp. 221-234 ◽  
Author(s):  
Constance Higginbottom ◽  
Margaret M. Taylor
Keyword(s):  
Heat Treatment ◽  
Bacillus Subtilis ◽  
Growth Temperature ◽  
Spore Germination ◽  
The Other ◽  
Lag Phase ◽  
Optimum Growth ◽  
Optimum Growth Temperature ◽  
Sterilized Milk ◽  
Partial Vacuum

SummaryThe sterilization of homogenized milk at 115·5°C for 15 min in bottles having a partial vacuum in the headspace produced conditions inhibitory to the growth from very small numbers of spores ofBacillus subtilis, B. licheniformis, B. cereusandB. breviswhen compared with growth in the same milk sterilized in open bottles.B. circulansdiffered from the other strains tested in showing greater inhibition in milk sterilized in open bottles than in milk sterilized under partial vacuum.The extent of the inhibition became less as the size of the inoculum was increased. It became less also as the temperature of incubation approached the optimum growth temperature of the bacillus, and was influenced by the strain of the bacillus and the source of the milk but not by the degree of heat treatment within the range 107–117·5°C for 15 min. Inhibition was manifested by a prolongation of the lag phase, and in addition with some strains inhibition of spore germination could be demonstrated.Spore formation following vegetative growth occurred more readily in milk sterilized in open than in evacuated bottles.Milks sterilized under partial vacuum frequently failed to show any growth from small inocula in 30 days at 22°C although growth occurred readily in milk sterilized in open bottles.

Determination of power-time curves of bacterial growth and study of optimum growth temperature and acidity

1995 ◽  
Vol 45 (1-2) ◽  
pp. 93-98 ◽  
Author(s):  
Zhaodong Nan ◽  
Yongjun Liu ◽  
Haitao Sun ◽  
Honglin Zhang ◽  
Shan Qingzhu ◽  
...  
Keyword(s):  
Bacterial Growth ◽  
Growth Temperature ◽  
Optimum Growth ◽  
Optimum Growth Temperature

Effect of Temperature on the Growth and Biochemical Composition of Sargassum muticum

2014 ◽  
Vol 989-994 ◽  
pp. 747-750 ◽  
Author(s):  
Chun Ying Yuan ◽  
Shuo Yang ◽  
Yue Wang ◽  
Qing Man Cui
Keyword(s):  
High Temperature ◽  
Growth Temperature ◽  
Biochemical Composition ◽  
Soluble Sugar ◽  
High Temperature Stress ◽  
Sargassum Muticum ◽  
Effect Of Temperature ◽  
Optimum Growth ◽  
Optimum Growth Temperature ◽  
Biochemical Components

Under the laboratory conditions, the effect of temperature (10, 15, 20, 25, 30°C) on growth and biochemical composition of Sargassum muticum was studied, the results showed that: the optimum growth temperature of S.muticum was 15 °C in the range of 10-30 °C; the contents of chlorophyll a, carotenoid, soluble protein, soluble sugar and brown algae polyphenols were the highest at the temperature of 25 °C, it was speculated that these components appeared compensatory increase duo to the high temperature stress. The contents of these biochemical components were the lowest at 30 °C.

Degradation of Natural Phosphorylated Compounds and Added Polyphosphates in Milk by Pseudomonas fluorescens CECT378, Lactococcus lactis CECT539, and Kluyveromyces marxianus CECT10584

2002 ◽  
Vol 65 (7) ◽  
pp. 1179-1182 ◽  
Author(s):  
JOSEFINA BELLOQUE ◽  
ALFONSO V. CARRASCOSA
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Pseudomonas Fluorescens ◽  
Lactococcus Lactis ◽  
Growth Temperature ◽  
Kluyveromyces Marxianus ◽  
Dairy Products ◽  
Optimum Growth ◽  
Optimum Growth Temperature ◽  
Phosphorylated Compounds ◽  
Preliminary Study

The degradation of natural phosphorylated compounds (galactose-1-phosphate, N-acetyl-glucosamine-1-phosphate, glycerophosphoethanolamine, and glycerophosphocholine) and added phosphorylated compounds (diphosphate) in milk was investigated by phosphorus 31 nuclear magnetic resonance on the incubation of a sterile milk with Pseudomonas fluorescens CECT381, Lactococcus lactis CECT539, and Kluyveromyces marxianus CECT10584. This preliminary study showed that the degradation of these compounds was dependent on the compound, microorganism, and temperature of incubation. K. marxianus CECT10584 did not show any capability to degrade these compounds, and L. lactis CECT539 was only able to degrade diphosphate at its optimum growth temperature. P. fluorescens CECT381 was the most active strain and possessed more hydrolytic capabilities at 10°C than at its optimum growth temperature. It is suggested that cold-induced enzymes are involved in the ability of P. fluorescens CECT381 to hydrolyze the natural phosphorylated compounds in milk. Consequent potential alterations of dairy products are discussed.

scholarly journals Prolixibacter denitrificans sp. nov., an iron-corroding, facultatively aerobic, nitrate-reducing bacterium isolated from crude oil, and emended descriptions of the genus Prolixibacter and Prolixibacter bellariivorans

2015 ◽  
Vol 65 (Pt_9) ◽  
pp. 2865-2869 ◽  
Author(s):  
Takao Iino ◽  
Mitsuo Sakamoto ◽  
Moriya Ohkuma
Keyword(s):  
Growth Temperature ◽  
Nitrate Reduction ◽  
Type Strain ◽  
Novel Species ◽  
Soluble Starch ◽  
Phylogenetic Position ◽  
Optimum Growth ◽  
Glucose Fermentation ◽  
Optimum Growth Temperature ◽  
Growth Temperature Range

The facultatively aerobic, non-hydrogenotrophic, iron (Fe0)-corroding, nitrate-reducing Prolixibacter sp. strain MIC1-1T was characterized for representation of a novel species of the genus Prolixibacter. Strain MIC1-1T grew optimally at 35–37 °C, at pH 6.5 and with 2  % (w/v) NaCl. Strain MIC1-1T also grew fermentatively on some pentoses, hexoses, disaccharides and soluble starch. Succinic acid was the major end-product from d-glucose fermentation. Strain MIC1-1T was differentiated from the type strain of Prolixibacter bellariivorans by cell size, optimum growth temperature, range of temperature and NaCl for growth, and nitrate reduction. On the basis of phenotypic features and the phylogenetic position, a novel species of the genus Prolixibacter is proposed for strain MIC1-1T, to be named Prolixibacter denitrificans sp. nov. The type strain is MIC1-1T ( = JCM 18694T = NBRC 102688T = DSM 27267T). Emended descriptions of the genus Prolixibacter and Prolixibacter bellariivorans are also provided.

The Preliminary Isolation and Identification of Several Aerobic Thermophilic Bacteria

2013 ◽  
Vol 807-809 ◽  
pp. 2019-2022
Author(s):  
Xiao Dan Huang ◽  
Jian Tan ◽  
Zheng Rong Yang ◽  
Lin Du
Keyword(s):  
High Temperature ◽  
Growth Temperature ◽  
Thermophilic Bacteria ◽  
Optimum Growth ◽  
Isolation And Identification ◽  
Gram Positive ◽  
Optimum Growth Temperature ◽  
Degradation Ability ◽  
Application Prospects

Thermophilic bacteria are widely existed in nature, and it has broadly application prospects in the degradation of organics. Here an aerobic thermophilic bacteria , which is named Z3, was isolated with high temperature cultivation. Z3 has well degradation ability to macromolecules organics such as starch, protein, lipid and cellulose .Z3 bacteria were identified as aerobic and Gram-positive Bacillus with spores, with the optimum growth temperature of about 65 °C.

EFFECTS OF LOW TEMPERATURES ON THE GROWTH OF MARINE BACTERIA

1933 ◽  
Vol 8 (1) ◽  
pp. 489-505 ◽  
Author(s):  
ERNEST HESS
Keyword(s):  
Growth Rate ◽  
Pseudomonas Fluorescens ◽  
Crop Yield ◽  
Marine Bacteria ◽  
Growth Temperature ◽  
Low Temperatures ◽  
Optimum Growth ◽  
Optimum Growth Temperature ◽  
Plate Counts ◽  
Logarithmic Growth

Growth of Pseudomonas fluorescens, Flavobacterium deciduosum, and B. vulgatus (all of marine origin) in buffered nutrient broth at 37°, 20°, 5°, 0° and −3 °C. has been followed quantitatively by means of plate counts. Maximum crops were obtained at 5 °C. in all cases, and higher total crops at 0° and −3° than at 37° and 20°. Maximum crop yield is considered a better criterion for optimum growth temperature than the growth rate during logarithmic growth. These marine bacteria are therefore considered to be truly psychrophilic.

302. Bacteriophages for Streptococcus cremoris Phage development at various temperatures

1943 ◽  
Vol 13 (2) ◽  
pp. 136-145 ◽  
Author(s):  
G. J. E. Hunter
Keyword(s):  
Growth Temperature ◽  
Effect Of Temperature ◽  
Optimum Growth ◽  
Cheese Making ◽  
Optimum Growth Temperature ◽  
Temperature Conditions ◽  
Streptococcus Cremoris ◽  
Phage Development

The effect of temperature on the growth in milk of several strains of Str. cremoris and their appropriate phages has been investigated. The phage races show a wider diversity of reaction to temperature conditions than do the homologous organisms. They frequently have different optimum growth temperatures quite distinct from the optimum growth temperature of the substrate organisms. Some races fail to multiply at 37° C.The implication of the results in cheese-making practice is discussed.

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