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lauric acid

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https://www.readbyqxmd.com/read/27900443/p450bm3-fused-to-phosphite-dehydrogenase-allows-phosphite-driven-selective-oxidations
#1
Nina Beyer, Justyna K Kulig, Anette Bartsch, Martin A Hayes, Dick B Janssen, Marco W Fraaije
To facilitate the wider application of the NADPH-dependent P450BM3, we fused the monooxygenase with a phosphite dehydrogenase (PTDH). The resulting monooxygenase-dehydrogenase fusion enzyme acts as a self-sufficient bifunctional catalyst, accepting phosphite as a cheap electron donor for the regeneration of NADPH.The well-expressed fusion enzyme was purified and analyzed in comparison to the parent enzymes. Using lauric acid as substrate for P450BM3, it was found that the fusion enzyme had similar substrate affinity and hydroxylation selectivity while it displayed a significantly higher activity than the non-fused monooxygenase...
November 29, 2016: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27894987/a-novel-approach-for-dry-powder-coating-of-pellets-with-ethylcellulose-part-i-evaluation-of-film-formulation-and-process-set-up
#2
Beatrice Albertini, Serena Bertoni, Cecilia Melegari, Luisa Stella Dolci, Nadia Passerini
An innovative dry powder coating technology was developed in a high-shear granulator using ethylcellulose (E10) as polymer. Several solid plasticizers were investigated with the aim of decreasing the polymer Tg at least to the highest possible working temperature (80°C). DSC analysis of physical mixtures of E10 and plasticizers evidenced that lauric acid (LA) was the most effective plasticizer. In order to reach the target temperature a liquid plasticizer, oleic acid (OA), was introduced in the coating formulation...
November 25, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27890614/structural-insights-into-the-binding-of-lauric-acid-to-cyp107l2-from-streptomyces-avermitilis
#3
Songhee Han, Tan-Viet Pham, Joo-Hwan Kim, Young-Ran Lim, Hyoung-Goo Park, Dabin Jeong, Chul-Ho Yun, Young-Jin Chun, Lin-Woo Kang, Donghak Kim
Streptomyces avermitilis is an actinobacterium known to produce clinically useful macrolides including avermectins. CYP107L2 from S. avermitilis shares a high sequence similarity with the PikC (CYP107L1) from S. venezuelae. To elucidate the structural features of CYP107L2, we conducted biochemical and structural characterization of CYP107L2 from S. avermitilis. The CYP107L2 gene was cloned, and its recombinant protein was expressed and purified. The CYP107L2 showed a low-spin state of heme, and the reduced form yielded the CO difference spectra with a maximal absorption at 449 nm...
November 25, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27881409/intake-of-individual-saturated-fatty-acids-and-risk-of-coronary-heart-disease-in-us-men-and-women-two-prospective-longitudinal-cohort-studies
#4
Geng Zong, Yanping Li, Anne J Wanders, Marjan Alssema, Peter L Zock, Walter C Willett, Frank B Hu, Qi Sun
OBJECTIVES:  To investigate the association between long term intake of individual saturated fatty acids (SFAs) and the risk of coronary heart disease, in two large cohort studies. DESIGN:  Prospective, longitudinal cohort study. SETTING:  Health professionals in the United States. PARTICIPANTS:  73 147 women in the Nurses' Health Study (1984-2012) and 42 635 men in the Health Professionals Follow-up Study (1986-2010), who were free of major chronic diseases at baseline...
November 23, 2016: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/27847327/solid-cellulose-nanofiber-based-foams-towards-facile-design-of-sustained-drug-delivery-systems
#5
Anna J Svagan, Jan-Willem Benjamins, Zeinab Al-Ansari, Daniel Bar Shalom, Anette Müllertz, Lars Wågberg, Korbinian Löbmann
Control of drug action through formulation is a vital and very challenging topic within pharmaceutical sciences. Cellulose nanofibers (CNF) are an excipient candidate in pharmaceutical formulations that could be used to easily optimize drug delivery rates. CNF has interesting physico-chemical properties that, when combined with surfactants, can be used to create very stable air bubbles and dry foams. Utilizing this inherent property, it is possible to modify the release kinetics of the model drug riboflavin in a facile way...
November 12, 2016: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/27793475/biochemical-analysis-of-recombinant-cyp4a11-allelic-variant-enzymes-w126r-k276t-and-s353g
#6
Songhee Han, Gun-Su Cha, Young-Jin Chun, Chang Hoon Lee, Donghak Kim, Chul-Ho Yun
Human CYP4A11 is the major ω-hydroxylase of fatty acids in the liver and kidneys. It produces 20-hydroxyeicosatetraenoic acid as well as hydroxylates fatty acids. In this study, we investigated the biochemical properties of three alleles of CYP4A11: W126R, K276T, and S353G. Site-directed mutagenesis of the wild type CYP4A11 was performed, to construct the W126R, K276T, and S353G variant clones. The CYP4A11 wild type and variant constructs were heterologously expressed in Escherichia coli. CO-binding spectra showed the expression of the wild type, K276T and S353G variants, indicating the functional P450 holoenzyme...
September 19, 2016: Drug Metabolism and Pharmacokinetics
https://www.readbyqxmd.com/read/27766599/fatty-acid-microemulsion-for-the-treatment-of-neonatal-conjunctivitis-quantification-characterisation-and-evaluation-of-antimicrobial-activity
#7
Ummara Butt, Amr ElShaer, Lori A S Snyder, Athina Chaidemenou, Raid G Alany
Fatty acids (FAs) are used by many organisms as defence mechanism against virulent bacteria. The high safety profile and broad spectrum of activity make them potential alternatives to currently used topical antibiotics for the treatment of eye infections in neonates. The current study utilised a Design of Experiment approach to optimise the quantification of five fatty acids namely; lauric acid, tridecanoic acid, myristoleic acid, palmitoleic acid and α-linolenic acid. The significance of the influence of the experimental parameters such as volume of catalyst, volume of n-hexane, incubation temperature, incubation time and the number of extraction steps on derivatisation was established by statistical screening with a factorial approach...
December 2016: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/27756558/safety-assessment-of-widely-used-fermented-virgin-coconut-oil-cocos-nucifera-in-malaysia-chronic-toxicity-studies-and-sar-analysis-of-the-active-components
#8
Ahmad H Ibrahim, Md Shamsuddin Sultan Khan, Sawsan S Al-Rawi, Mohamed B Khadeer Ahamed, Aman Shah Bin Abdul Majid, Fouad Saleih R Al-Suede, Dan Ji, Amin Malik Shah Abdul Majid
Fermented Virgin Coconut Oil (FVCO) is widely used in the Southeast Asia as food and traditional medicine. The objective of the present study is the evaluation of chronic safety of the commercialized FVCO of Malaysia and other Southeast Asian countries. A single dose of 5000 mg/kg of FVCO was administered orally in rats (each group, n = 5) for the acute toxicity study and 175, 550 and 2000 mg/kg for sub-chronic and chronic studies (each group, n = 10), respectively. The behavior, mortality, and body weight of the rats were assessed to determine the toxic effects of FVCO...
November 2016: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/27748233/changes-in-in-vitro-gas-and-methane-production-from-rumen-fluid-from-dairy-cows-during-adaptation-to-feed-additives-in-vivo
#9
G Klop, S van Laar-van Schuppen, W F Pellikaan, W H Hendriks, A Bannink, J Dijkstra
The adaptation of dairy cows to methane (CH4)-mitigating feed additives was evaluated using the in vitro gas production (GP) technique. Nine rumen-fistulated lactating Holstein cows were grouped into three blocks and within blocks randomly assigned to one of three experimental diets: Control (CON; no feed additive), Agolin Ruminant® (AR; 0.05 g/kg dry matter (DM)) or lauric acid (LA; 30 g/kg DM). Total mixed rations composed of maize silage, grass silage and concentrate were fed in a 40 : 30 : 30 ratio on DM basis...
October 17, 2016: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/27738952/degradation-mechanisms-of-polysorbate-20-differentiated-by-18-o-labeling-and-mass-spectrometry
#10
Lin Zhang, Sandeep Yadav, Barthélemy Demeule, Y John Wang, Olivier Mozziconacci, Christian Schӧneich
PURPOSE: To investigate the mechanisms of polysorbate (PS) degradation with the added objective of differentiating the hydrolysis and oxidation pathways. METHODS: Ultra-performance liquid chromatography mass spectrometry (UPLC-MS) was utilized to characterize all-laurate polysorbate 20 (PS20) and its degradants. (18)O stable isotope labeling was implemented to produce (18)O-labeled degradation products of all-laurate PS20 in H2(18)O, with subsequent UPLC-MS analysis for location of the cleavage site on the fatty acid-containing side chain of PS20...
October 13, 2016: Pharmaceutical Research
https://www.readbyqxmd.com/read/27733738/characterization-of-palm-fatty-acid-distillate-of-different-oil-processing-industries-of-pakistan
#11
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/27723158/shape-memory-of-microscale-and-nanoscale-imprinted-patterns-on-a-supramolecular-polymer-compound
#12
Ying Chen, Zhiyang Zhao, Alamgir Karim, R A Weiss
Surface memory effects for micropattern and nanopattern are demonstrated for shape memory compounds composed of mixtures of the zinc salt of a sulfonated poly(ethylene-co-propylene-co-ethylidene norbornene) ionomer and three different low molar mass fatty acids (FAs): lauric acid (LA), stearic acid (SA), and zinc stearate (ZnSt). This work shows the ability to tune the surface pattern switching temperature (Tc ) by simply varying the FA melting point. The melting point of the FA in the ionomer compound is depressed from that of the pure FA due to strong dipolar interactions between the ionomer and the FAs...
December 2016: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/27712060/composition-by-lc-ms-ms-of-new-carotenoid-esters-in-mango-and-citrus
#13
Fabiane Cristina Petry, Adriana Zerlotti Mercadante
Interest about composition of carotenoid esters of fruits is growing since esterification may affect their bioavailability. Thus, the aim was to provide detailed identification of carotenoid esters in Citrus and mango. Orange cv. Valencia and cv. Pera presented 9 free carotenoids, 38 mono- and 60 diesters. Violaxanthin and luteoxanthin derivatives were the major ones, followed by antheraxanthin, lutein, zeaxanthin, β-cryptoxanthin and zeinoxanthin esters; many of them reported for the first time in orange pulp...
October 7, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27704180/a-simple-method-for-isolation-and-construction-of-markerless-cyanobacterial-mutants-defective-in-acyl-acyl-carrier-protein-synthetase
#14
Kouji Kojima, Sumie Keta, Kazuma Uesaka, Akihiro Kato, Nobuyuki Takatani, Kunio Ihara, Tatsuo Omata, Makiko Aichi
Cyanobacterial mutants defective in acyl-acyl carrier protein synthetase (Aas) secrete free fatty acids (FFAs) into the external medium and hence have been used for the studies aimed at photosynthetic production of biofuels. While the wild-type strain of Synechocystis sp. PCC 6803 is highly sensitive to exogenously added linolenic acid, mutants defective in the aas gene are known to be resistant to the externally provided fatty acid. In this study, the wild-type Synechocystis cells were shown to be sensitive to lauric, oleic, and linoleic acids as well, and the resistance to these fatty acids was shown to be enhanced by inactivation of the aas gene...
December 2016: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27697029/fatty-acid-composition-of-mangrove-wild-legume-seeds-sesbania-speciosa-in-southwestern-india
#15
Kandikere R Sridhar, Dorathy D Anita, Sudeep D Ghate
This study compares the composition of fatty acid methyl esters (FAMEs) in seeds of Sesbania speciosa (dry and mature) after processing (uncooked and cooked) and extraction (hot and cold). Among PUFA, oleic, linoleic and linolenic acids were common to uncooked and cooked dry seeds which were high on cold extraction. Only two fatty acid ratios were favorable in hot extraction [(C14:0 + C15:0 + (C16:0 / C18:0) and C18:1 / C18:2]. Cold extraction yielded docosahexaenoic acid in uncooked as well as cooked dry seeds and all fatty acid ratios were nutritionally favorable...
October 3, 2016: Recent Patents on Food, Nutrition & Agriculture
https://www.readbyqxmd.com/read/27695785/dietary-linseed-oil-with-or-without-malate-increases-conjugated-linoleic-acid-and-oleic-acid-in-milk-fat-and-and-gene-expression-in-mammary-gland-and-milk-somatic-cells-of-lactating-goats
#16
X Z Li, S H Choi, C G Yan, J S Shin, S B Smith
Supplementary dietary plant oils have the potential to alter milk fatty acid composition in ruminants as a result of changes in the amount and kind of fatty acid precursors. We hypothesized that linseed oil in combination with malate (a key propionate precursor in the rumen) would increase ∆9 unsaturated fatty acids and specific gene expression in somatic cells and mammary glands of lactating goats. Twelve lactating goats were used in a 3 × 3 Latin square design. Treatments included the basal diet (CON), the CON plus 4% linseed oil (LO), and the CON plus 4% linseed oil and 2% -malate (LOM)...
August 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27679437/in-silico-and-wet-lab-studies-reveal-the-cholesterol-lowering-efficacy-of-lauric-acid-a-medium-chain-fat-of-coconut-oil
#17
Devi Lekshmi Sheela, Puthiyaveetil Abdulla Nazeem, Arunaksharan Narayanankutty, Jeksy Jos Manalil, Achuthan C Raghavamenon
The coconut oil (CO) contains 91 % of saturated fatty acids in which 72 % are medium chain fatty acids (MCFAs) like lauric, capric and caprylic acids. In contrast to animal fat, coconut oil has no cholesterol. Despite this fact, CO is sidelined among other vegetable oils due to the health hazards attributed to the saturated fatty acids. Though various medicinal effects of CO have been reported including the hypolipidemic activity, people are still confused in the consumption of this natural oil. In silico analyses and wet lab experiments have been carried out to identify the hypolipidemic properties of MCFAs and phenolic acids in CO by using different protein targets involved in cholesterol synthesis...
September 27, 2016: Plant Foods for Human Nutrition
https://www.readbyqxmd.com/read/27661281/-study-of-lipids-seed-s-oil-of-vitex-agnus-castus-growing-in-georgia
#18
B Kikalishvili, D Zurabashvili, Ts Sulakvelidze, M Malania, D Turabelidze
There was established the lipid composition of the seeds of Vitex agnus castus L. by the qualitative and quantitative methods of analyses. There were received neutral lipids from the seeds by extraction with hexane in the yield 10%, counted on dry material. For the divide of neutral lipids there was used silica gel plates LS 5/40 in the systems of solvents: 1. petroleum ether-diethylether-acidum aceticum (85:14:1), 2. hexane-diethylether (1:1). After obtaining neutral lipids from the residual plant shrot pollar lipids was extracted with the mixture of chloroform-methanol (2:1) and was divided on silica gel plates LS 5/40, mobile phase: 1...
July 2016: Georgian Medical News
https://www.readbyqxmd.com/read/27616069/formulation-and-characterization-of-esterified-xylo-oligosaccharides-stabilized-oil-in-water-emulsions-using-microchannel-emulsification
#19
Sunsanee Udomrati, Nauman Khalid, Shoichi Gohtani, Mitsutoshi Nakajima, Kunihiko Uemura, Isao Kobayashi
A series of amphiphilically esterified xylo-oligosaccharides (xylo esters) with different fatty acids residues - decanoic acid (C-10), lauric acid (C-12) and palmitic acid (C-16) - were enzymatically modified at 60°C for 4h. These xylo esters were used as emulsifiers to formulate oil-in-water (O/W) emulsions by microchannel emulsification (MCE). Grooved and straight-through MCE was used to investigate the droplet generation and/or emulsion stability. Xylo ester-stabilized oil droplets were generated smoothly from microchannels arranged linearly or two dimensionally, while xylo ester-stabilized emulsions were less monodispersed owing to low surface activity of the xylo esters...
September 6, 2016: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/27553650/effects-of-medium-chain-fatty-acids-on-the-structure-and-immune-response-of-ipec-j2-cells
#20
B Martínez-Vallespín, W Vahjen, J Zentek
Medium-chain fatty acids (MCFAs) have been suggested as an alternative to the use of antibiotics in animal nutrition with promising results. First, we studied the sensitivity of Salmonella Enteritidis and an enteropathogenic Escherichia coli strain against caprylic (C8), capric (C10) and lauric (C12) acids. A porcine in vitro model using the porcine cell line IPEC-J2 was used to test the effects of MCFAs on structural and immunological traits without and with a concomitant challenge with E. coli or S. Enteritidis...
October 2016: Cytotechnology
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