Rosa acicularis seed oil was extracted from Rosa acicularis seeds by the ultrasonic-assisted aqueous enzymatic method using cellulase and protease. Based on a single experiment, Plackett-Burman design was applied to ultrasonic-assisted aqueous enzymatic extraction of wild rose seed oil. The effects of enzyme amount, hydrolysis temperature and initial pH on total extraction rate of wild rose seed oil was studied by using Box-Behnken optimize methodology. Chemical characteristics of a sample of Rosa acicularis seeds and Rosa acicularis seed oil were characterized in this work. The tocopherol content was 200.6±0.3 mg/100 g oil. The Rosa acicularis seed oil was rich in linoleic acid (56.5%) and oleic acid (34.2%). The saturated fatty acids included palmitic acid (4%) and stearic acid (2.9%). The major fatty acids in the sn-2 position of triacylglycerol in Rosa acicularis oil were linoleic acid (60.6%), oleic acid (33.6%) and linolenic acid (3.2%). According to the 1,3-random-2-random hypothesis, the dominant triacylglycerols were LLL (18%), LLnL (1%), LLP (2%), LOL (10%), LLSt (1.2%), PLP (0.2%), LLnP (0.1%), LLnO (0.6%) and LOP (1.1%). This work could be useful for developing applications for Rosa acicularis seed oil.
The synthesis of phytosteryl ester via the lipase-catalyzed esterification of phytosterol with fatty acid from echium oil was performed in a recirculating packed bed reactor. A commercial lipase from Candida rugosa was immobilized and then used to optimize the reaction conditions for the synthesis of the phytosteryl ester. The parameters investigated were temperature, molar ratio of phytosterol to fatty acid, retention time, and amount of solvent. The optimum conditions were determined as the temperature of 40°C, the molar ratio of 1:3 (phytosterol to fatty acid), the retention time of 3 min, and the solvent amount of 40 mL. The maximum conversion of phytosteryl ester was ca. 90 mol% under the optimum conditions. The major fatty acid in phytosteryl ester synthesized was α-linolenic acid (ca. 38 mol%).
Disulfide linked gemini surfactant having a long spacer chain, [C10H21N(CH3)2(CH2)11SS(CH2)11N (CH3)2C10H21]2Br (2C1011SS), was prepared by the hydrolysis and oxidation process of thioester group for [C10H21N(CH3)2(CH2)11SCOCH3]Br. The critical vesicle concentrations of double tailed surfactants such as dialkyldimethylammonium bromide were observed by the conductivity and light scattering methods. The disulfide bonds of gemini surfactant, [C12H25N(CH3)2CH2CH2SSCH2CH2N(CH3)2C12H25]2Br (2C12SS), were rapidly cleaved by the addition of water-soluble dithiothreitol. However, it took long time to cleave the disulfide bonds of so-called double tailed surfactants 2C1011SS due to vesicle formation. The dynamic light scattering method showed that the diameters of 2C12SS micelles were increased with the cleavage of disulfide bonds, whereas those of 2C1011SS aggregates remained almost constant at 17.6 ±1.3 nm in similar size with dialkyldimethylammonium bromide vesicles. The time course of disulfide cleavage was examined by the conductivity and HPLC analysis. The produced thiol surfactants were returned to their original gemini surfactants by the addition of H2O2.
Biosurfactants (BSs) are produced in abundance from various feedstocks by diverse microorganisms, and are used in various applications. In this paper, we describe a new yeast isolate that produces glycolipid-BSs from glycerol, with the aim of enhancing the utilization of the surplus glycerol produced by the oleo-chemical industry. As a result of the screening, strain ZM1502 was obtained as a potential producer of BS from glycerol. Based on TLC analysis, the strain produced glycolipid BSs. According to structural analyses (NMR, MALDI-TOF MS, and GC-MS), the main component of the glycolipids was 6’,6”-di-O-acetylated acid-form sophorolipid (SL). Interestingly, the strain produced only acid-form SL, without lactone-form SLs, although the conventional SL-producing yeast, Starmerella bombicola, produces lactone-form SLs with small amounts of the acid-form. Based on taxonomy, the strain was identified as Candida floricola. It produced 3.5 g L–1 of acid-form SLs in 20% (w/v) glycerol. In addition, C. floricola CBS7290 and NBRC10700T also produced only acid-form SLs from glycerol. These results suggest that C. floricola would enhance the utilization of waste glycerol as a fermentation feedstock and facilitate a broad range of applications for SLs.
The composition of triacylglycerol (TAG) positional isomer (-PI) and enantiomer (-E) in immature chicken egg yolk, mature chicken yolk, and chicken meat was examined. POO (consisting of one palmitic acid (P) and two oleic acids (Os)), PPO (consisting of two Ps and one O), and PPL (consisting of two Ps and one linoleic acid (L)) were treated as representative TAG molecular species in all the analytical samples because P, O, and L were the major fatty acids comprising egg and chicken meat. sn-POO (binding P at sn-1 position) was predominant in egg yolks, while sn-OOP and sn-OPO were present in chicken meat. This difference was ascribed to the different roles of these isomers as nutrients, because TAG in egg yolk is important for new born organisms and TAG in chicken meat is used for fat accumulation. The compositions of the TAG isomers in PPO and PPL in egg yolk were similar, and O and L did not bind at the sn-1 position. In contrast, all the isomers of PPO and PPL were found in chicken meat. These results imply that the TAG structure could be modified so that the nutrient requirement is fulfilled in egg yolk and chicken meat.
This study investigated the in vitro and in vivo effects of Sunrouge (SR), which is an anthocyaninrich green tea. Hot and cold water extracts (CWEX) of Yabukita (YK; regular green tea), SR second crop (SR2), and SR third crop (SR3) were prepared. The 50% inhibitory concentrations for YK, SR2, and SR3 CWEXs against pancreatic lipase in vitro were 12.3±2.8, 6.2±0.3, and 4.0±1.1 mg/mL, respectively. Epigallocatechin gallate (EGCG) accounted for 4.3%, 6.0%, and 6.3% of YK, SR2, and SR3 CWEXs, respectively. SR2 had the highest anthocyanin content of these three samples. In vivo, the increase in the plasma triacylglycerol (TG) concentration following oral administration of oil to mice was significantly suppressed at 60 and 120 min in animals treated with SR2. No significant differences were observed between the plasma TG concentration in the YK and control groups. These results suggested that concomitant administration of SR with oil may suppress lipid absorption and that EGCG may exert this effect.
Vinegar is a widely used condiment in the world, and is produced from ethanol by acetic acid fermentation. Different fruits, vegetables, cereals, and wines can be used as ingredients for vinegar production. It is known that vinegar has many nutrient components such as organic acids, polyphenols, and aromatic compounds. Because of these bioactive components, it has many health benefits. China has a long history of producing vinegar and has been using it for health products and as medicine. Chinese aromatic Zhenjiang vinegar (Kozu) is produced from sticky rice. It is famous for its special flavor and health benefits. 5-Hydroxy-4-phenyl-butenolide (Fraglide-1) is a functional compound discovered in Kozu and has anti-fungal and anti-obesity effects. In this study, the Fraglide-1 content of different kinds of vinegars and ingredients, including Kozu samples and ingredients, was investigated. Fraglide-1 analysis was carried out via LC-MS/MS in multiple reaction monitoring mode. It was found that all the Kozu samples, as well as brown rice vinegar (Kurosu) samples, and the Chinese sticky rice husk used for the production of Kozu, contained Fraglide-1. Kozu production requires a 6-month- to 8-year-long aging process for its special flavor and aroma. Because of this long aging process, Fraglide-1 is thought to move from the sticky rice husk to Kozu.
Important Announcement for the Contributors of the Journal of Oleo Science;
At 0:00 AM on April 1, 2016 (Japan time), the Journal of Oleo Science will start charging Publication Charge for each case; 1: 20,000 yen (within 8 pages. /more than 8 pages, additional charge is necessary; 2,000 yen per page) for Members of Japan Oil Chemists’ Society (JOCS) (including Asian Members and Support Members), 2: 40,000 yen (within 8 pages. /more than 8 pages, additional charge is necessary; 4,000 yen per page) for Non-Members of JOCS.
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