Production of a Novel Short-Chain-Length-Long-Chain-Length Polyhydroxyalkanoate Co-Polymer by Pseudomonas Aeruginosa MTCC 7925 from Various Carbon Substrates

2014 ◽  
Vol 04 (03) ◽  
Author(s):  
Akhilesh Kumar Singh ◽  
Nirupama Mallick
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Chain Length ◽  
Short Chain ◽  
Short Chain Length ◽  
Carbon Substrates ◽  
Long Chain

Degrees of order of solubilized alkanes, alcohols, carboxylates, and carboxylic acids in oriented lyomesophases

1977 ◽  
Vol 55 (12) ◽  
pp. 2404-2410 ◽  
Author(s):  
Douglas M. Chen ◽  
Fred Y. Fujiwara ◽  
Leonard W. Reeves
Keyword(s):  
Carboxylic Acids ◽  
Chain Length ◽  
Linear Increase ◽  
Short Chain ◽  
Appreciable Amount ◽  
Linear Region ◽  
Short Chain Length ◽  
Chain Lengths ◽  
Degree Of Order ◽  
Limiting Value

The degree of order of solubilized molecules and ions in oriented lyomesophases has been determined at specifically deuterated C—D bond axes from the quadrupole splitting of the deuterium magnetic resonance. Mixtures at low concentration of specifically deuterated alkanes, alcohols, carboxylic acids, and carboxylates of different chain length have been observed in host cationic and anionic lyomesophases. The degree of order of a given C—D position in alcohols increases strongly with chain length up to a length comparable with the host detergent. A broad series of carboxylic acids and carboxylate ions from C2 to C16 have been deuterated in the α position. The α-C—D bond axis in the solubilisate increases in order with chain length, the anion having lower order than the parent acid. An accurately linear increase in the degree of order of the α position is observed for intermediate chain lengths. At chain lengths approximately equal to the host chain lengths the α position reaches a limiting value in the degree of order and further segments do not influence the order. At short chain lengths the degree of order is less than that predicted from extrapolation of order in the linear region. This has been interpreted in terms of distribution into the aqueous compartment by the solubilisates of short chain length. Acetic acid and the acetate, propionate, butanoate, and pentanoate ions spend an appreciable amount of time in the aqueous region. An estimate has been made of these distributions based on reasonable assumptions.

scholarly journals Nonacosan-10-ol and n-Alkanes in Leaves of Pinus pinaster

2020 ◽  
Vol 15 (5) ◽  
pp. 1934578X2092607
Author(s):  
Biljana Nikolić ◽  
Marina Todosijević ◽  
Iris Đorđević ◽  
Jovana Stanković ◽  
Zorica S. Mitić ◽  
...  
Keyword(s):  
Chain Length ◽  
Pinus Pinaster ◽  
Cuticular Wax ◽  
Short Chain ◽  
Average Chain Length ◽  
Carbon Preference Index ◽  
Preference Index ◽  
Long Chain

In leaf cuticular wax of Pinus pinaster, content of nonacosan-10-ol is high (77.1% on average). n-Alkanes ranged from C18 to C35 with the most dominant C29 (24.8%). The carbon preference index (CPItotal) ranged from 3.1 to 5.6 (4.0 on average), while the average chain length (ACLtotal) ranged from 14.0 to 17.0 (14.8 on average). Long-chain n-alkanes ( n-C25-35) strongly dominated (80.1%) over middle-chain ( n-C21-24 = 18.9%) and short-chain ( n -C18-20 = 0.9%) n-alkanes.

Kinetics of the pyrolysis of propylene. Part I

1970 ◽  
Vol 48 (2) ◽  
pp. 317-325 ◽  
Author(s):  
M. Simon ◽  
M. H. Back
Keyword(s):  
Molecular Weight ◽  
Chain Length ◽  
Sharp Increase ◽  
Pressure Range ◽  
Pressure Change ◽  
Short Chain ◽  
Short Chain Length ◽  
Radical Process ◽  
Initiation Step ◽  
Kinetics Of

The kinetics of the pyrolysis of propylene have been studied over the temperature range 743–873 °K and the pressure range 200–600 Torr. At the lower temperatures initial rates of formation of methane, propane, and C6 products were measured and shown to be formed by a radical process of very short chain length. The orders and activation energies of the rates were consistent with the occurrence of the bimolecular initiation step[Formula: see text]Measurement of the pressure change showed that products of molecular weight higher than C7 and not measured by the analysis were formed in the initial stages of the reaction at the lower temperatures. As these higher molecular weight compounds, which are more unstable than propylene, accumulated in the system their dissociation increased the concentration of radicals and caused a sharp increase in the rates of formation of the lower molecular weight stable products.

scholarly journals Modification and Potential Application of Short-Chain-Length Polyhydroxyalkanoate (SCL-PHA)

Polymers ◽  
2016 ◽  
Vol 8 (8) ◽  
pp. 273 ◽  
Author(s):  
Shichao Wang ◽  
Wei Chen ◽  
Hengxue Xiang ◽  
Junjie Yang ◽  
Zhe Zhou ◽  
...  
Keyword(s):  
Chain Length ◽  
Potential Application ◽  
Short Chain ◽  
Short Chain Length

scholarly journals Fast method for the determination of short-chain-length polyhydroxyalkanoates (scl-PHAs) in bacterial samples by In Vial-Thermolysis (IVT)

2017 ◽  
Vol 39 ◽  
pp. 29-35 ◽  
Author(s):  
F. Abbondanzi ◽  
G. Biscaro ◽  
G. Carvalho ◽  
L. Favaro ◽  
P. Lemos ◽  
...  
Keyword(s):  
Chain Length ◽  
Short Chain ◽  
Fast Method ◽  
Short Chain Length
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