Kinetics of Oil Sorption by Material Based on Leaf Litter

2019 ◽  
Vol 7 (2) ◽  
pp. 10-14
Author(s):  
А. Алексеева ◽  
A. Alekseeva ◽  
С. Степанова ◽  
S. Stepanova
Keyword(s):  
Leaf Litter ◽  
Heterogeneous Reactions ◽  
Desorption Process ◽  
Oil Sorption ◽  
Sorption Material ◽  
Material Contact ◽  
High Degree ◽  
Kinetics Of ◽  
Order Determination ◽  
Sorption Time

Studies of leaf litter as a sorption material with respect to oil at various temperatures have been carried out. It has been revealed that with process temperature increasing, the samples sorption capacity decreases. The oil sorption mechanism has been studied. It has been shown that the active sorption time was in the interval from 60 to 600 seconds. It has been proved that at the time of oil and sorption material contact for more than 600 seconds, the desorption process began. Kinetic dependencies of oil absorption by the proposed sorption material have been constructed and analyzed. The reaction order determination by a graphic method has showed that obtained functions with a high degree of correlation can be attributed to first-order heterogeneous reactions. Have been calculated thermodynamic parameters confirming the absence of a chemical reaction between oil and leaf litter. The carried out researches determine the most acceptable parameters of oil sorption by material based on leaf litter.

Kinetics of a Type of Heterogeneous Reactions

1932 ◽  
Vol 24 (4) ◽  
pp. 451-453 ◽  
Author(s):  
S. P. Burke ◽  
T. E. W. Schumann
Keyword(s):  
Heterogeneous Reactions ◽  
Kinetics Of

DNA—RNA hybridization

1975 ◽  
Vol 272 (915) ◽  
pp. 147-157 ◽  
Keyword(s):  
Nucleic Acid ◽  
Complex Mixture ◽  
Nucleic Acid Hybridization ◽  
Biological Research ◽  
Specific Sequence ◽  
Different Populations ◽  
Higher Eukaryotes ◽  
High Degree ◽  
Kinetics Of ◽  
Specific Sequences

Interest in nucleic acid hybridization stems mainly from its great power as a tool in biological research. It is used in several quite distinct ways. Because of the high degree of specificity that they show, hybridization techniques can be used to measure the amount of one specific sequence within a very heterogeneous mixture of sequences. Measurements of 1/10 6 -10 7 have been recorded. In extension of this, various properties of a specific sequence can often be studied. Secondly, because the kinetics of nucleic acid hybridization are quite well understood, it can be used to characterize both a pure sequence and a very complex mixture of sequences, like the genome of a vertebrate. Thirdly, again because of its specificity, it can be used to measure homologies between different populations of nucleic acids. Lastly, in conjunction with other techniques, it can be used as a basis for the fractionation of nucleic acid populations and the purification of specific sequences. Specific examples of these applications are given, with special reference to the organization of the genome in higher eukaryotes.

Systematic revision and phylogeny of the Australian myrmecomorphic seed bug genus Daerlac Signoret (Insecta:Heteroptera:Rhyparochromidae:Udeocorini)

2012 ◽  
Vol 26 (1) ◽  
pp. 41 ◽  
Author(s):  
Gerasimos Cassis ◽  
Celia Symonds
Keyword(s):  
Leaf Litter ◽  
Cladistic Analysis ◽  
Morphological Characters ◽  
Key To Species ◽  
Systematic Revision ◽  
Seed Predators ◽  
Taxonomic Key ◽  
Open Forest ◽  
High Degree ◽  
Degree Of Overlap

The Australian endemic ant-mimetic seed bug genus Daerlac is revised. This paper provides a redescription of the genus Daerlac and four species: D. apicalis, D. cephalotes, D. nigricans and D. picturatus. Daerlac tricolor is synonomised with D. cephalotes. A taxonomic key to species is provided. Known distributions of D. apicalis, D. nigricans and D. picturatus are each extended beyond previously known ranges. Daerlac species are found predominantly in temperate open forest and woodlands in association with ants and eucalypts. All species are broadly distributed and there is a high degree of overlap in distributions. They are seed predators found on the ground, in leaf litter, under bark or on trunks of eucalypts, and putatively forage on post-dispersed seeds. Cladistic analysis of morphological characters finds that the four species of Daerlac form two well-supported sister-groups (D. apicalis + D. picturatus, and D. cephalotes + D. nigricans). A discussion of the distribution, biology and myrmecomorphy of the genus is provided, and the tribal placement of Daerlac and its relationship to Laryngodus are discussed.

Kinetics of Rapid Heterogeneous Reactions on the Nanometer Scale

1997 ◽  
Vol 170 (2) ◽  
pp. 377-389 ◽  
Author(s):  
V.P. Zhdanov ◽  
B. Kasemo
Keyword(s):  
Heterogeneous Reactions ◽  
Nanometer Scale ◽  
Kinetics Of

Characterization of Type B Carbonate Apatite Sintered Bodies

2011 ◽  
Vol 1301 ◽  
Author(s):  
N. Watanobe ◽  
T. Yoshioka ◽  
T. Ikoma ◽  
T. Kuwayama ◽  
T. Higaki ◽  
...  
Keyword(s):  
Dissolution Kinetics ◽  
Carbonate Apatite ◽  
Artificial Bone ◽  
Type B ◽  
Desorption Process ◽  
Different Temperatures ◽  
Acidic Conditions ◽  
Kinetics Of ◽  
Potential Use

ABSTRACTThe dissolution kinetics of type B carbonate apatite (CAp) disks sintered at different temperatures were investigated under acidic conditions similar to an osteoclastic desorption process in bone remodeling. The type B CAp disks, which were uniaxially pressed at 98MPa and sintered at temperatures of 600 to 700 ºC, showed single crystalline phase and a high relative density of 60-62 % compared to the stoichiometric density of 3.16g/cm3 of hydroxyapatite (HAp). The dissolution rate of type B CAp disks sintered at 650 ºC was 3.5 times faster than that of HAp disks at 650 ºC. These results indicate that the Type B CAp sintered disks show potential use as a biodegradable material for artificial bone.

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