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Journal of Oleo Science

Akihiro Tsuchida, Koji Oshimo, Satoshi Horikoshi
Decomposition of urea in aqueous solution was carried out using a microwave discharge electrodeless lamp (MDEL) consisting of two photoreactors with a triple tube structure that generate vacuum-UV/UV light and reactive oxygen species (ROS) using microwaves (MW) as an energy source. The rate of decomposition of urea was highest under acidic conditions (pH 4) compared with those at pH 7 and 10.When used in combination with dispersed TiO2 , a photocatalyst, high decomposition efficiency was achieved with less power consumption...
June 12, 2018: Journal of Oleo Science
Keisuke Tanaka, Yuki Hirai, Toshiyuki Suzuki, Kenichi Sakai, Hideki Sakai
The aqueous phase diagram of monohexadecyl phosphate neutralized by L-arginine (C16MP-Arg) was studied using analytical techniques including differential scanning calorimetry (DSC) and small/wide-angle X-ray scattering (SWAXS) measurements. We found that the mixture could form an α-gel over wide ranges of concentrations and temperatures. The α-gel was thermodynamically stable at 25°C (below the phase transition temperature for hexagonal or lamellar liquid crystals), and did not transform to coagel for at least one year...
July 1, 2018: Journal of Oleo Science
Fahad Aljuhaimi, Kashif Ghafoor, Mehmet Musa Özcan, Otilija Miseckaite, Elfadıl E Babiker, Shadzad Hussain
In this study, physico-chemical properties of raw and roasted tigernut oils extracted by two different solvents were determined. Peroxide values of raw and roasted tigernut oils extracted by petroleum ether and n-hexane solvents changed between 0.83 and 0.91 meqO2 /100g to 1.57 and 1.63 meqO2 /100g, respectively. While oleic acid contents of raw tigernut oils extracted by petroleum ether and n-hexane are determined as 66.83 and 67.47%, oleic acid contents of roasted tigernut oils extracted by petroleum ether and n-hexane were determined as 67...
July 1, 2018: Journal of Oleo Science
Toshiya Morikawa, Yoshiaki Yamamoto, Yoshimune Nonomura
Fatty acid calcium salt is a high melting point powder excellent in lubricity and water repellency and is often used as a cosmetic raw material. We have shown that several calcium salts of fatty acids have high selective bactericidal activity against Staphylococcus aureus and Propionibacterium acnes and low bactericidal activity against Staphylococcus epidermidis. In this study, we evaluated the influence of pH on the bactericidal behavior of calcium laurate, and showed that under acidic conditions it shows higher bactericidal activity against both bacteria but selectivity becomes lower...
July 1, 2018: Journal of Oleo Science
Azusa Nishino, Kazuhisa Sugimoto, Haruyo Sambe, Takashi Ichihara, Takeshi Takaha, Takashi Kuriki
Generation of singlet oxygen by solar ultraviolet (UV) radiation causes acute inflammatory responses in the skin. Accumulation of singlet-oxygen-quenching antioxidants in the skin can suppress this photo-oxidative stress. This study evaluated the effect of dietary xanthophylls from red paprika fruit extract on UV-induced skin damage. A randomised double-blind placebo-controlled parallel group comparison study involving 46 healthy volunteers was performed. The minimal erythema dose (MED) of each individual was determined prior to the study...
July 1, 2018: Journal of Oleo Science
Yue Zhao, Qingguan Liu, Shuang Zhang, Lianzhou Jiang, Yang Liu, Cuiping Han
The present study compared the texture, water holding capacity, and microstructure, as well as performed a particle and sensory evaluation, of soymilk-cow's milk gels induced by acidification of a commercial starter culture with the addition of glucono-δ-lactone (GDL). Texture analysis indicated that gels made with different amounts of GDL had diverse properties. The water holding capacity (WHC) results suggested that the gels had some WHC differences. In addition, the gels with less GDL did not form a network structure...
July 1, 2018: Journal of Oleo Science
Hiroshi Takahashi, Kenta Takada, Kenichi Nishimura, Ryota Watanabe
The structure and thermal behavior of a synthetic D-erythro-ceramide [NDS], (2S,3R)-2-octadecanoylamino-octadecane-1,3-diol (CER), molecular assembly in a UV-curable acrylic adhesive resin (acResin® ) were investigated by differential scanning calorimetry (DSC), polarized-light microscopy, and X-ray diffraction (XRD). CER in the resin was found to exhibit a thermal-history-dependent polymorphic phase behavior that is similar but not identical to that observed for pure CER. The melting temperatures of the in-resin CER samples were lower than those of pure CER samples...
July 1, 2018: Journal of Oleo Science
Sompong Sansenya, Yanling Hua, Saowapa Chumanee
Aroma intensities of rice are correlated with the mixture of aroma compounds it contains. 2-acetyl-1-pyrroline (2AP) has been reported as a major aroma compound and as a characteristic compound in fragrant rice. In this study, Thai local cultivars were classified into fragrant and non-fragrant rice based on the 2AP content and molecular characterization. Local rice cultivars were also examined for their proline content and volatile compounds profile, which are important factors in determining aroma. The results suggested that 43 Thai local rice cultivars were classified into 25 fragrant rice cultivars and 18 non-fragrant cultivars...
July 1, 2018: Journal of Oleo Science
Makoto Uyama, Hidefumi Araki, Tadao Fukuhara, Kei Watanabe
The α-form hydrated crystalline phase (often called as an α-gel) is one of the hydrated crystalline phases which can be exhibited by surfactants and lipids. In this study, a novel system of an α-form hydrated crystal was developed, composed of 3-(10-carboxydecyl)-1,1,1,3,5,5,5-heptamethyl trisiloxane (CDTS), polyoxyethylene (5 mol) glyceryl monostearate (GMS-5), higher alcohol. This is the first report to indicate that a silicone surfactant can form an α-form hydrated crystal. The physicochemical properties of this system were characterized by small and wide angle X-ray scattering (SWAXS), differential scanning calorimetry (DSC), and diffusion-ordered NMR spectroscopy (DOSY) experiments...
July 1, 2018: Journal of Oleo Science
Ekaterina Jeliazkova, Valtcho D Zheljazkov, Miroslava Kačániova, Tess Astatkie, Babu L Tekwani
The profile and bioactivity of hops (Humulus lupulus L.) essential oil, a complex natural product extracted from cones via steam distillation, depends on genetic and environmental factors, and may also depend on extraction process. We hypothesized that compound mixtures eluted sequentially and captured at different timeframes during the steam distillation process of whole hop cones would have differential chemical and bioactivity profiles. The essential oil was collected sequentially at 8 distillation time (DT) intervals: 0-2, 2-5, 5-10, 10-30, 30-60, 60-120, 120-180, and 180-240 min...
July 1, 2018: Journal of Oleo Science
Feng Jin, Ji Wang, Joe M Regenstein, Fengjun Wang
Volatile compounds and quality changes of bitter apricot (Armeniaca sibirica L.) kernel oil (AKO) with different roasting conditions were determined. Bitter apricot kernels were roasted at 120, 130, 140 and 150°C for 15 min. Unroasted bitter apricot kernel oil was used as the control. Quality indicators included color, acid value and peroxide value, fatty acids, total phenols and oxidative stability. Peroxide values of the tested oils were 0.46-0.82 meq/kg, acid values were 0.60-1.40 mg KOH/g, and total phenol contents were 54...
July 1, 2018: Journal of Oleo Science
Hichem Ben Salah, Mouna Kchaou, Rihab Ben Abdallah Kolsi, Raed Abdennabi, Mohamed Ayedi, Néji Gharsallah, Noureddine Allouche
Seeds oils of Phalaris canariensis extracted by ultrasonication and cold maceration were evaluated for their physical characteristics, total phenol contents, fatty acid and sterol compositions as well as for their antioxidant, antibacterial and acetylcholinesterase activities. The physicochemical properties of ultrasonication and cold maceration oils respectively were: acid values (4.00 and 3.25) mg KOH/g, peroxide values (5.53 and 4.41) meq O2 Kg-1 , iodine values (88.83 and 95.17) g/100 g of oil, saponification values (119...
July 1, 2018: Journal of Oleo Science
Liang-Huei Chen, Yung-Fang Liu, Klaus Krug, Yuh-Lang Lee
The adsorption behavior of an Cu electroplating additive, 3,3 thiobis-(1-propanesulfonic acid sodium salt) (TBPS) in a process of Cu deposition onto a single crystalline Au(111) surface is studied by an in-situ Surface-Enhanced Infrared Absorption Spectroscopy (SEIRAS). The SEIRAS spectra of the TBPS adlayer on a Cu film is investigated first and compared to that on an Au film. These results are utilized to evaluate the characteristics of TBPS adlayer on the electrode surface during the Cu deposition and stripping processes...
June 1, 2018: Journal of Oleo Science
An-Tsung Kuo, Cheng-Lin Tu, Yu-Min Yang, Chien-Hsiang Chang
In this study, a pseudodouble-chained ion pair amphiphile (IPA), hexadecyltrimethylammoniumdodecylsulfate (HTMA-DS), and dialkyldimethylammonium bromide (DXDAB) with different chain lengths were used as the main materials to fabricate positively charged catanionic vesicles with various mole fractions of cholesterol. The effects of cholesterol and DXDAB alkyl chain length on physical stability of the catanionic vesicles were then investigated by size, zeta potential, and Fourier transform infrared analyses. With the presence of cholesterol in the mixed HTMA-DS/DXDAB vesicles or with increasing the DXDAB content in the presence of a proper amount of cholesterol, the physical stability of the catanionic vesicles could be enhanced...
June 1, 2018: Journal of Oleo Science
Kento Iwai, Soichi Yokoyama, Haruyasu Asahara, Nagatoshi Nishiwaki
A facile method for synthesizing allyl propargyl ethers (APEs) was developed based on the dimerization of propargyl alcohols. The reaction proceeded via an oxaphosphetane intermediate, which was generated without the use of a strong base, thus making this process a pseudo-Wittig reaction under mild reaction conditions. A wide variety of functional groups, including formyl and pyridyl groups were tolerated, thus yielding the corresponding functionalized APEs, which are otherwise not readily prepared via conventional methods...
June 1, 2018: Journal of Oleo Science
Atsadawuth Siangsai, Katipot Inkong, Santi Kulprathipanja, Boonyarach Kitiyanan, Pramoch Rangsunvigit
Sodium dodecyl sulfate (SDS) markedly improved tetrahydrofuran (THF) - assisted methane hydrate formation. Firstly, methane hydrate formation with different THF amount, 1, 3, and 5.56 mol%, was studied. SDS with 1, 4, and 8 mM was then investigated for its roles on the methane hydrate formation with and without THF. The experiments were conducted in a quiescent condition in a fixed volume crystallizer at 8 MPa and 4°C. The results showed that almost all studied THF and SDS concentrations enhanced the methane hydrate formation kinetics and methane consumption compared to that without the promoters, except 1 mol% THF...
June 1, 2018: Journal of Oleo Science
Lu Zhang, Satoru Ueno, Kiyotaka Sato
Most natural lipids contain a complex mixture of individual triacylglycerols (TAGs). An in-depth knowledge of the mixing behavior of TAGs is necessary for the rational design and engineering of food materials. The binary phase diagram of TAGs is a simplified model that can be explored to help foster an understanding of the phase behavior of complex fats and oils. This article reviews recent research on the binary phase behavior of saturated-unsaturated mixed-acid TAGs, with special emphasis on the stearicunsaturated and palmitic-unsaturated diacid TAGs...
June 1, 2018: Journal of Oleo Science
Rauzah Hashim, N Idayu Zahid, T S Velayutham, Nurul Fadhilah Kamalul Aripin, Shigesaburo Ogawa, Akihiko Sugimura
Also recognized as carbohydrate liquid crystals, glycolipids are amphiphiles whose basic unit comprises of a sugar group attached to an alkyl chain. Glycolipids are amphitropic, which means these materials form liquid crystal self-assemblies when dry (thermotropic) as well as when dissolved in solvents (lyotropic/surfactants) such as water. Many glycolipids are also naturally derived since these can be found in cell membranes. Their membrane and surfactant functions are largely understood through their lyotropic properties...
June 1, 2018: Journal of Oleo Science
Phumon Sookwong, Sugunya Mahatheeranont
Rice bran contains a great amount of functional lipids and phytochemicals including γ-oryzanols, tocotrienols, and tocopherols. However, utilization of those compounds is limited and needs some proven guidelines for better implementation. We introduce some effective strategies for the utilization of rice functional lipids, including an introduction of pigmented rice varieties for better bioactive compounds, biofortification of rice tocotrienols, plasma technology for improving rice phytochemicals, supercritical CO2 extraction of high quality rice bran oil, and an example on the development of tocotrienol-fortified foods...
June 1, 2018: Journal of Oleo Science
Mingli Hu, Mei Bai, Wei Ye, Yaling Wang, Hong Wu
Dried flower buds of Magnolia biondii Pamp. are the main ingredient in "Xin-yi" in China, and the volatile oils of M. biondii flower buds are the principal medicinal component. Gas chromatographymass spectrometry (GC-MS) and microscopic techniques were employed to detect the volatile yields of M. biondii flowers at various growth stages. The volatile oil yields of M. biondii flowers differed significantly at different growth stages and were closely related to flower dry weight, oil cell density and degree of oil accumulation...
June 1, 2018: Journal of Oleo Science
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