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Journal of Oleo Science

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https://www.readbyqxmd.com/read/27890877/exploring-the-multifunctionality-of-a-novel-long-chain-amidoamine-amphiphile
#1
Makoto Nakagawa, Takeshi Kawai
In this review, we demonstrate that the practical applications of a novel long-chain amidoamine derivative with a simple molecular structure (C18AA) are equivalent to or higher in number than those of supramolecules with complex molecular structures. Molecular assemblies of C18AA exhibit distinctive thermal responsiveness; namely, C18AA can form a gel with apolar organic solvents, while O/W emulsions of C18AA act as a heat-induced gelator that undergoes a phase transition from solution to gel upon heating. We also show that C18AA emulsions containing a quaternary ammonium salt develop an iridescent color over a specific temperature range...
November 25, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27733742/effects-of-minor-components-of-crude-vegetable-oil-on-the-enzymatic-method-to-analyze-positional-fatty-acid-distributions-in-triacylglycerols-withcandida-antarctica-lipase-b
#2
Ryuji Hori, Takashi Sano, Jun Imagi, Yomi Watanabe
Crude soybean and rapeseed oils were subjected to the method to determine FA distributions in TAG using Candida antarctica lipase B, giving similar results to those for refined oils. Minor components in crude oils, such as percentages of FFA or phospholipids were indicated not to affect 1(3)-selective transesterification by the lipase and FA compositional analysis of the resulting 2-MAG fraction significantly. Phospholipids were confirmed not to contaminate the 2-MAG fraction. Oxidized soybean oil with a PV of 10 meq/kg also gave similar results to the ones for refined oil...
October 12, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27733741/study-on-colloid-vibration-current-in-aqueous-solution-of-binary-surfactant-mixtures-effects-of-counterions-and-hydrophobic-chains
#3
Youichi Takata, Atsushi Hyono, Hiroyuki Ohshima
In order to elucidate an electroacoustic phenomenon of mixed micelles in an aqueous solution, we measured the colloid vibration current (CVI) in aqueous solutions of binary surfactant mixtures. Based on the thermodynamic treatment of critical micelle concentration (cmc) values determined by conductivity measurements, it was expected that dodecyltrimethylammonium bromide (DTAB) and dodecyltrimethylammonium chloride (DTAC) molecules would mix ideally in the micelle. However, the micelle composition as evaluated from the CVI measurement, based on the linear dependence of the CVI value on the micelle composition, differed from the aforementioned ideality...
October 12, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27733740/production-of-biodiesel-from-acid-oil-via-a-two-step-enzymatic-transesterification
#4
Nakyung Choi, Jeom-Sig Lee, Jieun Kwak, Junsoo Lee, In-Hwan Kim
A two-step enzymatic transesterification process in a solvent-free system has been developed as a novel approach to the production of biodiesel using acid oil from rice bran oil soapstock. The acid oil consisted of 53.7 wt% fatty acids, 2.4 wt% monoacylglycerols, 9.1 wt% diacylglycerols, 28.8 wt% triacylglycerols, and 6.0 wt% others. Three immobilized lipases were evaluated as potential biocatalysts, including Novozym 435 from Candida antarctica, Lipozyme RM IM from Rhizomucor miehei, and Lipozyme TL IM from Thermomyces lanuginosus...
October 12, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27733739/adhesion-and-disintegration-phenomena-on-fractal-agar-gel-surfaces
#5
Ayano Kudo, Marika Sato, Haruna Sawaguchi, Jun-Ichi Hotta, Hiroyuki Mayama, Yoshimune Nonomura
In the present study, mechanical phenomena on fractal agar gel were analyzed to understand the interfacial properties of hydrophilic biosurfaces. The evaluation of adhesion strength between the fractal agar gel surfaces showed that the fractal structure inhibits the adhesion between the agar gel surfaces. In addition, when the disintegration behavior of an agar gel block was observed between fractal agar gel substrates, the rough structure prevented the sliding of an agar gel block. These findings are useful for understanding the biological significance of rough structure on the biological surfaces...
October 12, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27733738/characterization-of-palm-fatty-acid-distillate-of-different-oil-processing-industries-of-pakistan
#6
Abdul Sattar Chang, Syed Tufail Hussain Sherazi, Aftab Ahmed Kandhro, Sarfaraz Ahmed Mahesar, Fouzia Chang, Syed Nasrullah Shah, Zahid Hussain Laghari, Tarique Panhwar
Palm fatty acid distillate (PFAD) is cheap and valuable byproduct of edible oil processing industries. This study was designed to characterize PFAD collected from different local oil industries. AOCS methods were used for the determination of physicochemical parameters such as free fatty acid (FFA), saponification value (SV), iodine value (IV), peroxide value (PV) and moisture content. Fatty acid composition was analyzed using GC-MS. Moisture content of samples was found to be in the range between 0.06-7.50%, while FFA, SV, IV and PV were found to be 65...
October 12, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27725362/a-review-of-extraction-techniques-for-avocado-oil
#7
Xiaoli Qin, Jinfeng Zhong
Avocado fruit is rich in monounsaturated fat and contains relatively high level of important lipid-soluble compounds such as vitamin E, β-sitosterol and carotenoids. The consumption of avocado fruit is highly related to its potential benefits. However, with the increase of avocado production, short time of maturation and easy oxidation of avocado fruit are the main problem for producers. The production of oil from avocado fruit, thus, is highly promoted. This paper discusses the effects of different extraction methods on chemical composition and yield of oils from avocado fruits...
September 30, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27829615/bioconversion-of-docosapentaenoic-acid-in-human-cell-lines-caco-2-hepg2-and-thp-1
#8
Yanzhu Tian, Donato Romanazzi, Kazuo Miyashita, Masashi Hosokawa
Docosapentaenoic acids (DPAs) are long chain polyunsaturated fatty acids that exist as two major structural isomers: n-3 DPA and n-6 DPA. n-3 DPA is found in seal meat, salmon and abalone, and n-6 DPA is found in several marine microbial oil. We investigated the bioconversion of n-3 and n-6 DPAs in three different human cell lines, Caco-2, HepG2, and THP-1. n-3 DPA was converted to docosahexaenoic acid only in HepG2 cells. In contrast, retro-conversion to eicosapentaenoic acid (EPA) was observed in all three cell lines...
December 1, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27829614/vegetable-oil-deodorizer-distillate-a-rich-source-of-the-natural-bioactive-components
#9
Syed Tufail Hussain Sherazi, Sarfaraz Ahmed Mahesar, Sirajuddin
Deodorizer distillates are waste products of edible oil processing industries obtained during deodorization process of vegetable oils. It is very cheap source of several health beneficial components such as tocopherols, sterols, squalene as well as free fatty acids which have numerous industrial applications. These valuable components are being used in different foods, pharmaceutical formulations and cosmetics. Traditional sources of these useful components are vegetable oils, fruits, vegetables and nuts. Global need of these important components has been exceeded than their availability...
December 1, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27829613/quantification-of-triacylglycerol-positional-isomers-in-rat-milk
#10
Natsuko Watanabe, Toshiharu Nagai, Hoyo Mizobe, Kazuaki Yoshinaga, Akihiko Yoshida, Yohei Kitamura, Takashi Shimizu, Fumiaki Beppu, Naohiro Gotoh
The absolute amount of triacylglycerol (TAG) positional isomers was analyzed in rat milk fat, a representative of non-ruminant milk fat, using a HPLC-UV-atmospheric pressure chemical ionization-MS/MS system equipped with an octacosyl silylation column or polymeric ODS column. TAGs consisting of two oleic acids (O) and one palmitic acid (P) were the most abundant. In particular, β-OPO, a TAG binding P at the β-position (sn-2) and two Os at the α-positions (sn-1/3), was prominent. The β-OPO content decreased over time, while a TAG consisting of two Ps and one capric acid, a medium-chain fatty acid, increased...
December 1, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27829612/effects-of-ultrasonic-parameters-on-the-crystallization-behavior-of-virgin-coconut-oil
#11
Linhe Wu, Jun Cao, Xinpeng Bai, Haiming Chen, Yuxiang Zhang, Qian Wu
Crystallization behavior of virgin coconut oil (VCO) in the absence and presence of ultrasonic treatment under a temperature gradient field was investigated. The effects of ultrasonic parameters on the crystallization behavior of VCO were studied by differential scanning calorimetry, ultraviolet/visible spectrophotometry and polarized light microscopy. The thermal effect of the ultrasonic treatment was also increased at higher power levels. Therefore, the optimal power level was determined at approximately 36 W...
December 1, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27829611/sodium-lauryl-sulfate-stimulates-the-generation-of-reactive-oxygen-species-through-interactions-with-cell-membranes
#12
Taeko Mizutani, Ryota Mori, Misaki Hirayama, Yuki Sagawa, Kenji Shimizu, Yuri Okano, Hitoshi Masaki
Sodium lauryl sulfate (SLS), a representative anionic surfactant, is well-known to induce rough skin following single or multiple topical applications. The mechanism by which SLS induces rough skin is thought to result from the disruption of skin moisture function consisting of NMF and epidermal lipids. However, a recent study demonstrated that topically applied SLS easily penetrates into the living cell layers of the epidermis, which suggests that physiological alterations of keratinocytes might cause the SLS-induced rough skin...
December 1, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27829610/effect-of-physicochemical-surface-modifications-on-bovine-serum-albumin-adsorption-to-tetragonal-zirconia-polycrystal-in-vitro-through-the-change-of-the-zeta-potential
#13
Nahoko Miyake, Tadashi Miura, Koji Tanabe, Ryuichi Hisanaga, Shuichiro Yamashita, Toru Sato, Masao Yoshinari
The technology of physicochemical surface modification is available for enhancing the bioactivity and osseointegration capability of tetragonal zirconia polycrystal (TZP). Hydrophobicity index and electrical charge play important roles in protein adsorption. We previously studied the mechanism underlying the adsorption of bovine serum albumin (BSA) on the surfaces of dental materials and hydroxyapatite in vitro. The aim of the present study was to clarify the correlation among the adsorption of BSA to TZP and physicochemically modified TZP surfaces and the zeta potential of BSA and TZP...
December 1, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27829609/pharmacokinetic-studies-of-gel-system-containing-ibuprofen-solid-nanoparticles
#14
Noriaki Nagai, Tadatoshi Tanino, Yoshimasa Ito
In the therapy of rheumatoid arthritis, ibuprofen (IBU) is widely used; however, it has been limited the clinical use by its systemic side effect, such as gastrointestinal lesions. Therefore, we prepared topical gel ointment used IBU solid nanoparticles (IBUnano-gel formulation). In addition, we demonstrated their anti-inflammatory effect by using arthritis model rat (adjuvant-induced arthritis rat, AA rat). The gel formulations were prepared using additives (Carbopol 934, 2-hydroxypropyl-β-cyclodextrin and methylcellulose) and bead mill-method...
December 1, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27829608/comparative-study-of-oil-quality-and-aroma-profiles-from-tunisian-olive-cultivars-growing-in-saharian-oasis-using-chemometric-analysis
#15
Olfa Dridi Gargouri, Yasmine Ben Rouina, Amir Ben Mansour, Guido Flamini, Bechir Ben Rouina, Mohamed Bouaziz
Aroma profile, oxidative stability and quality parameters of virgin olive oil from four cultivars (Chemlali, Chetoui, Koroneiki and Rjim), grown in Rjim Maatoug oasis in southern of Tunisia, were studied for the first time. The olive oil samples were obtained during maturation from a crop season (2012-2013). The results showed the quality parameters, i.e., free fatty acid, UV absorbance at 232 and 270 nm, increases during maturation exceeding the upper limit established by the IOOC norm. Chlorophyll and carotenoid pigments tended to decrease during ripening stages...
December 1, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27829607/synthesis-of-novel-fatty-substituted-4-methyl-2hchromen-2-one-via-cross-metathesis-potential-antioxidants-and-chemotherapeutic-agents
#16
Vyshnavi Yelchuri, R B N Prasad, Mallampalli S L Karuna, Y Poornachandra, Chityal Ganesh Kumar
A series of novel fatty substituted 4-methyl-2H-chromen-2-one (coumarins) were synthesized by employing cross metathesis, a key step in the synthesis. The antioxidant activities of the title compounds were compared with the commercial antioxidants, namely butylated hydroxy toluene (BHT) and α-tocopherol, glycosidic and other substituted 4-methyl-2H-chromen-2-ones. Among the different 4-methyl-2H-chromen-2-ones, the glycosidic substituted 4-methyl-2H-chromen-2-ones was excellent, while those with aliphatic fatty acid chain and hydroxyl substitutents were good...
December 1, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27773918/ion-specific-effect-on-oil-in-water-emulsion-gels-containing-a-stimuli-responsive-fibrous-assembly-of-amidoamine-derivative-hydrogelator
#17
Clara Morita-Imura, Yoshiro Imura, Takeshi Kawai
Amidoamine derivative C18AA forms a highly viscous oil-in-water (O/W) emulsion, called an "emulsion gel." Previously, it was showed that the viscosity sensitively changes with the C18AA concentration, temperature, pH changes, and salt addition. In this work, C18AA concentration in the continuous aqueous phase ([C18AA]w) was investigated at different compositions, and it was found that a threshold concentration value of 16.5 wt% was required to obtain a highly viscous emulsion gel below 45°C. C18AA formed micellar networks in the aqueous phase, and stimuli or additives increase the value of [C18AA]w, so that the C18AA micellar network could grow in the continuous aqueous phase...
December 1, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27733743/zn-coordinated-lipid-nanocapsules-with-high-physical-stability-and-water-responsive-morphological-change
#18
Wuxiao Ding, Masaru Aoyagi, Mitsutoshi Masuda, Masaki Kogiso
A novel lipid nanocapsule with high physical stability and the ability to undergo a water-responsive morphological change was prepared using a facile method from inexpensive and simple materials such as a glycylglycine-containing lipid and zinc acetate. The zinc-coordinated nanocapsule is comprised of solid bilayer membranes, which are stabilized by polyglycine-II type hydrogen-bond network and Zn-lipid coordination resulting in a high thermal stability in the dry state. The nanocapsules can easily encapsulate guest molecules such as methylene blue in the hollow space by dissolving the molecules in ethanol during preparation...
December 1, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27628735/synthesis-and-solution-properties-of-adamantane-containing-quaternary-ammonium-salt-type-cationic-surfactants-hydrocarbon-based-fluorocarbonbased-and-bola-type
#19
Tomokazu Yoshimura, Mari Okada, Keisuke Matsuoka
Quaternary ammonium salt-type cationic surfactants with an adamantyl group (hydrocarbon-type; CnAdAB, fluorocarbon-type; Cm(F)C3AdAB, bola-type; Ad-s-Ad, where n, m and s represent hydrocarbon chain lengths of 8-16, fluorocarbon chain lengths of 4-8, and spacer chain length of 10-12) were synthesized via quaternization of N, N-dimethylaminoadamantane and n-alkyl bromide or 1, n-dibromoalkane. Conductivity and surface tension were measured to characterize the solution properties of the synthesized adamantyl group-containing cationic surfactants...
October 1, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27628734/alternate-calcification-in-microcapillaries-for-the-fabrication-of-hydroxyapatite-films-without-light-exposure-calcination-or-applied-voltage
#20
Satoshi Watanabe, Munetoyo Iida, Mutsuyoshi Matsumoto
We discuss an alternate method for calcification in microcapillaries for fabricating calcium phosphate films using silicone molds and calcifying solutions. Calcium phosphate films with a line/space of 5-50 µm were fabricated by controlling the concentrations of calcium chloride and sodium phosphate solutions. Plate-type crystals of hydroxyapatite were grown when the calcium phosphate films were immersed in hydroxyapatite precursors. In the initial stage of hydroxyapatite crystal growth, the c-plane of the crystals was grown parallel to the substrates, and subsequently the growth followed with the c-plane growing perpendicular to the substrates...
October 1, 2016: Journal of Oleo Science
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