Measurement and Correlation of the Solid−Liquid−Gas Equilibria for Carbon Dioxide + Octadecanoic Acid (Stearic Acid) and Carbon Dioxide + 1-Octadecanol (Stearyl Alcohol) Systems

2010 ◽  
Vol 55 (2) ◽  
pp. 925-929 ◽  
Author(s):  
Hirohisa Uchida ◽  
Tetsuo Kamijo
Keyword(s):  
Carbon Dioxide ◽  
Stearic Acid ◽  
Stearyl Alcohol ◽  
Octadecanoic Acid ◽  
Solid Liquid

scholarly journals Solubility of Anthraquinone Derivatives in Supercritical Carbon Dioxide: New Correlations

Molecules ◽  
2021 ◽  
Vol 26 (2) ◽  
pp. 460
Author(s):  
Ratna Surya Alwi ◽  
Chandrasekhar Garlapati ◽  
Kazuhiro Tamura
Keyword(s):  
Carbon Dioxide ◽  
Liquid Phase ◽  
Supercritical Carbon Dioxide ◽  
Binary Systems ◽  
Relative Deviation ◽  
Anthraquinone Derivatives ◽  
New Models ◽  
Solubility Isotherms ◽  
Solid Liquid ◽  
Supercritical Carbon

Solubility of several anthraquinone derivatives in supercritical carbon dioxide was readily available in the literature, but correcting ability of the existing models was poor. Therefore, in this work, two new models have been developed for better correlation based on solid–liquid phase equilibria. The new model has five adjustable parameters correlating the solubility isotherms as a function of temperature. The accuracy of the proposed models was evaluated by correlating 25 binary systems. The proposed models observed provide the best overall correlations. The overall deviation between the experimental and the correlated results was less than 11.46% in averaged absolute relative deviation (AARD). Moreover, exiting solubility models were also evaluated for all the compounds for the comparison purpose.

scholarly journals THE USE OF ENVIRONMENTAL WASTE IN THE ISSUE OF GREEN ECONOMY OF THE REGIONS

2021 ◽  
Author(s):  
M. Opara ◽  
Natalia Azarova
Keyword(s):  
Carbon Dioxide ◽  
Alternative Energy ◽  
Raw Materials ◽  
Human Life ◽  
Raw Material ◽  
Green Economy ◽  
Energy Sources ◽  
Alternative Energy Sources ◽  
Solid Liquid ◽  
State Of The Environment

Currently, an urgent issue is the preservation of the environment, the cyclical use of waste for the production of new products, the preservation and multiplication of the planet’s natural resources. After all, the quality of life of each person directly depends on the state of the environment and the factors that affect its preservation. These factors are an integral part of the development of a green economy. This article discusses the possibility of producing alternative energy sources, such as biofuels of three generations.The first generation is solid, liquid, and gaseous biofuels. Second-generation fuel is obtained from the biomass of plant and animal material residues, or grown crops. As an example, such a type of fuel as biogas, which consists of carbon dioxide and methane, and with its further processing, namely the separation of carbon dioxide, you can get biomethane. In the same way, such fuels as biodiesel and bioethanol can be obtained from the biological mass. And the most unusual raw material for the production of third-generation fuel is biofuel from algae. Unfortunately, the development of the green economy in Russia is taking slow steps, but at present this issue is being paid more attention. The development of technologies for obtaining alternative energy sources will allow us to produce not only new types of energy, but also to preserve the environment of our priceless planet, through the use of raw materials and waste that are not in demand in everyday human life.

scholarly journals Evaluation of the Antibacterial Activities of Isolated Bioactive Components from the plant Adenodolichos paniculatus

2021 ◽  
Vol 19 (2) ◽  
pp. 429-447
Author(s):  
A.E. Onwuliri ◽  
I.F. Kyahar ◽  
J.O. Ehinmidu ◽  
P.O. Oladosu
Keyword(s):  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Stearic Acid ◽  
Streptococcus Pyogenes ◽  
Antibacterial Activities ◽  
Bioactive Components ◽  
Octadecanoic Acid ◽  
Zones Of Inhibition ◽  
Rf Values ◽  
Component C

The three bioactive components isolated included: component A (major phytochemicals were Bis (2-ethylhexyl) phthalate (16.36 %), 9,12-Octadecadienoic acid, ethyl ether (14.77 %) and 9.cis., 11.trans.-octadecadie noate (14.77 %), component B (major phytochemicals were 9,12-Octadecadienal (Linoleic acid) (40.98 %), Octadecanoic acid (Stearic acid) (9.26 %), Undecanoic acid, 10-bromo- (10-bromoudecanoic acid) (9.26 %) and n-Hexadecanoic acid (Palmitic acid) and component C (cis-9-octadecenoic acid (Oleic Acid) (30.45 %), Octadecanoic acid (Stearic acid) (17.33 %)). These components isolated from the chloroform fraction of Adenodolichos paniculatus are used by traditional medicinal practitioners for the management of mouth and throat infections. The antibacterial activities against Streptococcus pyogenes, Staphylococcus aureus and Pseudomonas aeruginosa were evaluated using bioautography and agar-well diffusion methods. The bioautogram result showed that component A had inhibited spots against S. pyogenes (17.50 mm) and P. aeruginosa (16.00 mm), corresponding to the TLC spots with Rf values of 0.594, 0.55 and 0.26, respectively. Component B showed inhibition spots against Streptococcus pyogenes (36.50 mm), Staphylococcus aureus (16.00 mm) and Pseudomonas aeruginosa (11.00 mm), corresponding to the TLC spots with Rf values 0.891, 0.87, 0.85 and 0.25, respectively. Component C showed inhibition spots against Streptococcus pyogenes (16.50 mm), Staphylococcus aureus (15.00 mm) and Pseudomonas aeruginosa (10.50 mm), corresponding to the TLC spots Rf values of 0.938, 0.44, 0.21 and 0.90, respectively. For the agar-well diffusion method, component A at 1 mg/ml inhibited Streptococcus pyogenes, Staphylococcus aureus and Pseudomonas aeruginosa growths with zones of inhibition 23.0, 19.5 and 17.50 mm, respectively. MIC and MBC of component A were 125, 250 and 250 and 250, 500 and 500 μg/ml, respectively. Component B at 1 mg/ml inhibited Streptococcus pyogenes, Staphylococcus aureus and Pseudomonas aeruginosa growth with zones of inhibition 30.0, 28.0 and 18.5 mm, respectively. MIC and MBC of the compound B were 31, 62 and 125 and 62, 125 and 250 μg/ml, respectively. Component C at 1 mg/ml inhibited Streptococcus pyogenes, Staphylococcus aureus and Pseudomonas aeruginosa growth with zones of inhibition 24.5, 20.5 and 17.0 mm, respectively. MIC and MBC of the component C were 62, 125 and 250 and 125, 250 and 500 μg/ml, respectively. This study confirmed that bioactive compounds of A. paniculatus root have antibacterial properties and support the use of this part of the plant as a traditional remedy for mouth and throat infections possibly caused by the test bacteria.

CHARACTERIZATION OF FIXED OIL FROM SEEDS OF MOMORDICA TUBEROSA (ROXB) COGN. (CUCURBITACEAE) FRUITS BY GC-MS

INDIAN DRUGS ◽  
2012 ◽  
Vol 49 (04) ◽  
pp. 39-42
Author(s):  
M. S Kale ◽  
◽  
K. S. Laddha
Keyword(s):  
Oleic Acid ◽  
Stearic Acid ◽  
Eleostearic Acid ◽  
Octadecenoic Acid ◽  
Acid Value ◽  
Octadecatrienoic Acid ◽  
Octadecanoic Acid ◽  
Hexadecanoic Acid ◽  
Saponification Value

Fixed oil obtained from the seeds of Momordica tuberosa (Roxb) Cogn. fruits (family: Cucurbitaceae) was analyzed using GC-MS. Five compounds, namely palmitic acid (hexadecanoic acid), oleic acid (9-octadecenoic acid), stearic acid (octadecanoic acid), ?-eleostearic acid (9, 11, 13-octadecatrienoic acid) and gama-linolenic acid (6, 9, 12-octadecatrienoic acid) were found to be major compounds in fixed oil obtained from the seeds of M. tuberosa fruits. Physical constants saponification value, unsaponifiable matter and acid value were found to be 182.4, 1.56% w/w and 11.44 respectively.

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