Dispersion of Ceramic Particles in Organic Liquids

1986 ◽  
Vol 73 ◽  
Author(s):  
P. D. Calvert ◽  
R. R. Lalanandham ◽  
M. V. Parish ◽  
J. Fox ◽  
H. Lee ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Organic Solvents ◽  
Aromatic Compounds ◽  
Coupling Agents ◽  
Organic Liquids ◽  
Oxide Ceramics ◽  
Ceramic Particles ◽  
Good Dispersion

ABSTRACTGood dispersion of oxide ceramics in organic solvents can be achieved using many different dispersants. Several types of dispersants, including fatty acids, coupling agents, polar aromatic compounds and polymers, are discussed to illustrate the important phenomena. Many new problems arise in actual slips during ceramics processing; these are briefly discussed.

Peroxidase activity of bacterial cytochrome P450 enzymes: Modulation by fatty acids and organic solvents

2010 ◽  
Vol 5 (8) ◽  
pp. 891-899 ◽  
Author(s):  
Kersten S. Rabe ◽  
Michael Erkelenz ◽  
Kathrin Kiko ◽  
Christof M. Niemeyer
Keyword(s):  
Fatty Acids ◽  
Cytochrome P450 ◽  
Organic Solvents ◽  
Peroxidase Activity ◽  
Cytochrome P450 Enzymes

scholarly journals Chemical Profiles of Cultivated Agarwood Induced by Different Techniques

Molecules ◽  
2019 ◽  
Vol 24 (10) ◽  
pp. 1990 ◽  
Author(s):  
Tingting Yan ◽  
Sheng Yang ◽  
Yuan Chen ◽  
Qian Wang ◽  
Gaiyun Li
Keyword(s):  
Fatty Acids ◽  
Aromatic Compounds ◽  
Chemical Constituents ◽  
Aquilaria Sinensis ◽  
Chemical Inducers ◽  
Esi Ms ◽  
Study Results ◽  
Chemical Profiles

Agarwood is the resinous wood produced in some Aquilaria species and is highly valued for wide usages in medicine, incense, and perfume. To protect the threatened Aquilaria species, the cultivation of Aquilaria sinensis and artificial agarwood induction techniques have been effectively established in China. To evaluate the quality of agarwood induced by different techniques, patterns of chemical constituents in artificial agarwood by four methods (wounding using an axe, burning-chisel-drilling, chemical inducer, and biological inoculation) were analyzed and compared by UPLC-ESI-MS/MS and GC-EI-MS in this study. Results of GC-MS gave a panorama of chemical constituents in agarwood, including aromatic compounds, steroids, fatty acids, sesquiterpenoids, and 2-(2-phenlyethyl)-chromones (PECs). Sesquiterpenoids were dominant in agarwood induced by wounding using an axe. PEC comprised over 60% of components in agarwood produced by biological inoculation and chemical inducers. PECs were identified by UPLC-ESI-MS/MS in all artificial agarwood and the relative contents varied in different groups. Tetrahydro-2-(2-phenylethyl)-chromones (THPECs) in wounding by axes induced agarwood were lower while 2-(2-phenylethyl)-chromones (FPECs) were higher than other groups. The results showed that methods used for inducing agarwood formation in Aquilaria sinensis affect the chemical constituents of agarwood.

Reverse micellar extraction of dyes based on fatty acids and recoverable organic solvents

2020 ◽  
Vol 242 ◽  
pp. 116772
Author(s):  
Lais Bukman ◽  
Vagner Roberto De Souza ◽  
Nádia Regina Camargo Fernandes ◽  
Wilker Caetano ◽  
Vagner Roberto Batistela ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Organic Solvents ◽  
Micellar Extraction ◽  
Reverse Micellar Extraction ◽  
Reverse Micellar

scholarly journals Performance of Various Organic Solvents as Reaction Media in Plant Oil Lipolysis with Plant Lipase

REAKTOR ◽  
2018 ◽  
Vol 18 (2) ◽  
pp. 71
Author(s):  
Astri Nur Istyami ◽  
Tatang Hernas Soerawidjaja ◽  
Tirto Prakoso ◽  
Tri Ari Penia Kresnowati
Keyword(s):  
Fatty Acids ◽  
Organic Solvent ◽  
Organic Solvents ◽  
Process Condition ◽  
Plant Oil ◽  
Plant Lipase ◽  
Reaction Media ◽  
Hydrolysis Of ◽  
Product Degradation ◽  
Plant Latex

Fatty acids are intermediate substances in synthesis of oleochemical products. Enzymatic technology of fatty acids production (also known as lipolysis) is now developing as potential substitution for the conventional production of fatty acid, i.e. thermal hydrolysis of triglyceride. It offers more economical process condition, low energy consumption, and minimal product degradation compared to the conventional process. This research aims to evaluate performance of various organic solvents as reaction media in lipolysis with plant latex lipase. Organic solvents observed were chloroform, n-hexane, diethyl ether, benzene, acetone, ethanol, methanol, n-heptane, and isooctane. Analysis of each organic solvent effect on lipolysis was described based on solvents properties. Conversion of lipolysis with organic solvents is 0,10-1,25 times fold compared to conversion of non-solvent lipolysis. We suggest that dielectric constant and viscosity are the two main organic solvent properties affecting lipase performance in lipolysis. Overall, n-hexane, n-heptane, and isooctane are recommended to be used as reaction media in lipolysis with plant lipase because their effects to degree of lipolysis are positive.  Keywords: lipolysis; lipase; organic solvent; frangipani

Chemical Investigation of the Lichen Species Alectoria ochroleuca, Stereocaulon vesuvianum var. pulvinatum and Icmadophila ericetorum

1977 ◽  
Vol 32 (3-4) ◽  
pp. 182-189 ◽  
Author(s):  
Yngve Solberg
Keyword(s):  
Fatty Acids ◽  
Aromatic Compounds ◽  
Lichen Species ◽  
Chemical Investigation ◽  
Phenolic Components ◽  
Higher Fatty Acids ◽  
Unsaturated Triglyceride

Abstract Lichens, Lipids, Phenols The three lichen species Alectoria ochroleuca, Stereocaulon vesuvianum var. pulvinatum and Icmadophila ericetorum have been chemically investigated with regard to their content of aliphatic and aromatic compounds. Tetrahydroxy fatty acids were isolated in all three species. A mono-acetylated pentol, higher fatty acids and an unsaturated triglyceride were detected as new con­ stituents of A. ochroleuca and I. ericetorum. S. vesuvianum and I. ericetorum both contained phenolic components which not previously have been discussed in literature. Chemical and spectro­ scopic evidences are presented in these studies.

A New Method for Estimating the Selectivity of Lipases for Fatty Acids and Fatty Alcohols in Organic Solvents

1995 ◽  
Vol 750 (1 Enzyme Engine) ◽  
pp. 209-214 ◽  
Author(s):  
SHI-DE LIU ◽  
SHU-GUI CAO ◽  
ZHONG-TIAN DING ◽  
LING-FENG SUN ◽  
NIAN-XIANG ZHANG ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Organic Solvents ◽  
Fatty Alcohols ◽  
New Method

scholarly journals Preparation and Characterization of Binary Organogels via Some Azobenzene Amino Derivatives and Different Fatty Acids: Self-Assembly and Nanostructures

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Haiying Guo ◽  
Tifeng Jiao ◽  
Xihai Shen ◽  
Qingrui Zhang ◽  
Adan Li ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Organic Solvents ◽  
Self Assembly ◽  
Alkyl Substituent ◽  
Soft Materials ◽  
Spectral Studies ◽  
Hydrophobic Force ◽  
Alkyl Chains ◽  
Morphological Studies ◽  
Amino Derivatives

In present work the gelation behaviors of binary organogels composed of azobenzene amino derivatives and fatty acids with different alkyl chains in various organic solvents were designed and investigated. Their gelation behaviors in 20 solvents were tested as new binary organic gelators. It showed that the length of alkyl substituent chains and azobenzene segment have played a crucial role in the gelation behavior of all gelator mixtures in various organic solvents. Longer alkyl chains in molecular skeletons in present gelators are favorable for the gelation of organic solvents. Morphological studies revealed that the gelator molecules self-assemble into different aggregates from lamella, wrinkle, to belt with change of solvents. Spectral studies indicated that there existed different H-bond formation and hydrophobic force, depending on different substituent chains in molecular skeletons. The present work may also give new perspectives for designing new binary organogelators and soft materials.

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