Effect of temperature on growth and activity of a methanogenic culture utilising acetate

1977 ◽  
Vol 23 (7) ◽  
pp. 898-902 ◽  
Author(s):  
L. van den Berg
Keyword(s):  
Acetic Acid ◽  
Production Rate ◽  
Biomass Production ◽  
Growth Temperature ◽  
Biomass Yield ◽  
Effect Of Temperature ◽  
Maximum Temperature ◽  
Optimum Growth ◽  
Optimum Temperature ◽  
Optimum Growth Temperature

Studies with a methanogenic culture enriched for use of acetic acid showed that this culture had an optimum growth temperature of 35 °C, with only small differences for other temperatures between 30 and 40 °C. The optimum temperature was the same when determined on the basis of biomass production rate during the exponential (log) phase of growth (0.08–0.09 day−1, at 35 °C), amount of biomass present at the end of the log phase (100 mg/ℓ), activity of the biomass (rate of conversion in millimoles per day per milligram (dry wt.) biomass present, 0.08 at end of log phase), or biomass yield (mg (dry wt.) biomass produced per millimole acetic acid converted, 1.0–1.1). Temperatures outside the range 30 to 40 °C caused marked reductions in the above parameters. The maximum temperature for growth was 42–44 °C; the minimum, below 15 °C, the lowest temperature studied. Acetic acid conversion to methane was 0.8–1.0 mol/mol, and was independent of 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.

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.

Ability of isolates of Confertobasidiumolivaceo-album to stain and decay wood

1981 ◽  
Vol 11 (3) ◽  
pp. 497-501 ◽  
Author(s):  
W. E. Eslyn
Keyword(s):  
Weight Loss ◽  
Decay Rate ◽  
Growth Temperature ◽  
Decay Rates ◽  
Optimum Growth ◽  
Optimum Temperature ◽  
Optimum Growth Temperature ◽  
Decay Wood ◽  
Soil Block

Ten isolates of Confertobasidiumolivaceo-album (Bourd. & Galz.) Jülich (Corticiumfuscostratum Burt) were tested to determine optimum temperature for growth and capability to stain and decay wood. Optimum growth temperature for the majority of the isolates was 22 °C. Decay rates for all isolates were uniformly low, and after 12 weeks of incubation, weight loss was never more than 5%. Decay was greater in pine heartwood than in sapwood, averaging 3.7–3.9% and 2.2–2.3%, respectively. Little or no difference in decay rate occurred between soil-block tests at 22 °C and at 27 °C. Two of the 10 isolates caused a golden-orange stain in pine heartwood.

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.

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

THE EFFECTS OF TEMPERATURE UPON PANCREATIC AMYLASE IN SELECTED REPTILES AND AN AMPHIBIAN

1967 ◽  
Vol 45 (2) ◽  
pp. 227-232 ◽  
Author(s):  
Yvette Abrahamson ◽  
Michael Maher
Keyword(s):  
Thermal Stability ◽  
Amylase Activity ◽  
Effect Of Temperature ◽  
Maximum Temperature ◽  
Pancreatic Amylase ◽  
Optimum Temperature ◽  
Preferred Temperatures ◽  
Effects Of Temperature ◽  
Subcellular Level ◽  
Thermal Stability Of

The effect of temperature on pancreatic amylase was studied on three species of reptiles and one amphibian. Pancreata were removed from the animals, homogenized, and assayed for amylase activity by the Caraway procedure. Assays were conducted at various temperatures to determine the optimum temperature of activity and the maximum temperature for thermal stability of pancreatic amylase. It appears that between reptiles and amphibians, and also among species of reptiles, there are thermally dependent differences at the subcellular level which are similar to the differences in the preferred temperatures of the animals.

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.

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.

scholarly journals The Effect of Temperature and Salinity on the Growth of Skeletonema costatum and Chlorella capsulata in vitro

2016 ◽  
Vol 10 (1) ◽  
pp. 40-44 ◽  
Author(s):  
Esmat Ebrahimi ◽  
Alireza Salarzadeh
Keyword(s):  
Growth Rate ◽  
Biomass Production ◽  
Skeletonema Costatum ◽  
Life Sciences ◽  
Effect Of Temperature ◽  
Optimum Growth ◽  
Microalgal Biomass ◽  
Lower Salinity ◽  
Major Factors

Salinity and temperature are two of the major factors controlling the growth rate of microalgae. In this study, the effect of salinity and temperature on the growth of marine microalgae; Chlorella capsulata and Skeletonema costatum were investigated to optimize the microalgal biomass production. These species were cultured at different salinities (20, 25 and 30 ‰) and temperatures (20, 25 and 30°C). Skeletonema costatum and Chlorella capsulata had significantly higher (p<0.05) growth rate when cultured at salinities of 30 and 25 ‰, respectively. In terms of temperature, the highest (p<0.05) growth rate was observed in Skeletonema costatum and Chlorella capsulata cultivated at temperatures of 30 and 25°C, respectively. This study indicated that Skeletonema costatum was suitable to marine condition, whereas Chlorella capsulata showed optimum growth at lower salinity and temperature. In addition, can be concluded, Chlorella capsulata and Skeletonema costatum can be considered as suitable species for large outdoor micro algal cultivation.International Journal of Life Sciences 10 (1) : 2016; 40-44

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