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https://www.readbyqxmd.com/read/28256818/investigating-the-photocatalytic-degradation-of-oil-paint-using-atr-ir-and-afm-ir
#1
Suzanne Morsch, Birgit A van Driel, Klaas Jan van den Berg, Joris Dik
As linseed oil has a longstanding and continuing history of use as a binder in artistic paints, developing an understanding of its degradation mechanism is critical to conservation efforts. At present, little can be done to detect the early stages of oil paint deterioration due to the complex chemical composition of degrading paints. In this work, we use advanced infrared analysis techniques to investigate the UV-induced deterioration of model linseed oil paints in detail. Subdiffraction limit infrared analysis (AFM-IR) is applied to identify and map accelerated degradation in the presence of two different grades of titanium white pigment particles (rutile or anatase TiO2)...
March 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28215803/polycyclic-aromatic-hydrocarbons-pahs-produced-in-the-combustion-of-fatty-acid-alkyl-esters-from-different-feedstocks-quantification-statistical-analysis-and-mechanisms-of-formation
#2
Alberto Llamas, Ana-María Al-Lal, María-Jesús García-Martínez, Marcelo F Ortega, Juan F Llamas, Magín Lapuerta, Laureano Canoira
Polycyclic Aromatic Hydrocarbons (PAHs) are pollutants of concern due to their carcinogenic and mutagenic activity. Their emissions are mainly related with the combustion or pyrolysis of the organic matter, such as in fossil fuels combustion. It is important to characterize PAHs in the combustions of biofuels due to their increasing importance in the actual energetic setting. There is a lot of research focused in PAHs emission due to the combustion in diesel engines; but only few of them have analyzed the effect of raw material and type of alcohol used in the transesterification process...
May 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28197106/inhibition-of-intermediate-conductance-calcium-activated-k-channel-kca3-1-and-fibroblast-mitogenesis-by-%C3%AE-linolenic-acid-and-alterations-of-channel-expression-in-the-lysosomal-storage-disorders-fabry-disease-and-niemann-pick-c
#3
Aida Oliván-Viguera, Javier Lozano-Gerona, Laura López de Frutos, Jorge J Cebolla, Pilar Irún, Edgar Abarca-Lachen, Ana J García-Malinis, Ángel Luis García-Otín, Yolanda Gilaberte, Pilar Giraldo, Ralf Köhler
The calcium/calmodulin-gated KCa3.1 channel regulates normal and abnormal mitogenesis by controlling K(+)-efflux, cell volume, and membrane hyperpolarization-driven calcium-entry. Recent studies suggest modulation of KCa3.1 by omega-3 fatty acids as negative modulators and impaired KCa3.1 functions in the inherited lysosomal storage disorder (LSD), Fabry disease (FD). In the first part of present study, we characterize KCa3.1 in murine and human fibroblasts and test the impact of omega-3 fatty acids on fibroblast proliferation...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28190849/luminol-chemiluminescence-profile-of-o-w-emulsions-during-thermal-oxidation
#4
Mitsuhiro Wada, Akiko Yamaguchi, Akihiro Ogawa, Hirotsugu Kido, Shinichi Nakamura, Makoto Takada, Shigeru Kawakami, Naotaka Kuroda, Kenichiro Nakashima
The luminol chemiluminescence (CL) profile of an oil-in-water (O/W) emulsion during thermal oxidation (60°C) was assessed using the luminol-K3[Fe(CN)6] assay, in which the oxidation species produced by the autoxidation of an O/W emulsion generated CL emission. Increased CL intensity was observed for O/W emulsions prepared using either linseed or corn oil, which was increased by the addition of Fe(2+) to the O/W emulsion. The relationship between the CL profile and results obtained by conventional approaches, such as the peroxide value (PV) and thiobarbituric acid (TBA) methods, were compared...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28188639/effect-of-unconventional-oilseeds-safflower-poppy-hemp-camelina-on-in-vitro-ruminal-methane-production-and-fermentation
#5
Shaopu Wang, Michael Kreuzer, Ueli Braun, Angela Schwarm
BACKGROUND: Dietary supplementation with oilseeds can reduce methane emission in ruminants, but only a few common seeds have been tested so far. This study tested safflower (Carthamus tinctorius), poppy (Papaver somniferum), hemp (Cannabis sativa), and camelina (Camelina sativa) seeds in vitro using coconut (Cocos nucifera) oil and linseed (Linum usitatissimum) as positive controls. RESULTS: All the tested oilseeds suppressed methane yield (ml g(-1) dry matter, up to 21%) compared to the non-supplemented control when provided at 70 g oil kg(-1) dry matter, and they were as effective as coconut oil...
February 11, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28163789/a-porcine-gluteus-medius-muscle-genome-wide-transcriptome-analysis-dietary-effects-of-omega-6-and-omega-3-fatty-acids-on-biological-mechanisms
#6
Magdalena Ogłuszka, Agnieszka Szostak, Marinus F W Te Pas, Ewa Poławska, Paweł Urbański, Tadeusz Blicharski, Chandra S Pareek, Edyta Juszczuk-Kubiak, Jenelle R Dunkelberger, Jarosław O Horbańczuk, Mariusz Pierzchała
BACKGROUND: The level of omega-6 and omega-3 polyunsaturated fatty acids can affect many cellular systems and function via nuclear receptors or the bioactive lipid regulation of gene expression. The objective of this study was to investigate changes in the muscle transcriptome and the biological functions regulated by increased consumption of omega-3 and omega-6 fatty acids in the pig gluteus medius muscle. RESULTS: The transcriptome of the gluteus medius muscle was studied for pigs subjected to either a control diet or a diet supplemented with linseed and rapeseed oil to increase polyunsaturated fatty acid content...
2017: Genes & Nutrition
https://www.readbyqxmd.com/read/28112058/a-n-3-pufa-depletion-applied-to-rainbow-trout-fry-oncorhynchus-mykiss-does-not-modulate-its-subsequent-lipid-bioconversion-capacity
#7
Julie Mellery, Jonathan Brel, Junio Dort, Florian Geay, Patrick Kestemont, David S Francis, Yvan Larondelle, Xavier Rollin
Nutritional strategies are currently developed to produce farmed fish rich in n-3 long-chain PUFA (LC-PUFA) whilst replacing fish oil by plant-derived oils in aquafeeds. The optimisation of such strategies requires a thorough understanding of fish lipid metabolism and its nutritional modulation. The present study evaluated the fatty acid bioconversion capacity of rainbow trout (Oncorhynchus mykiss) fry previously depleted in n-3 PUFA through a 60-d pre-experimental feeding period with a sunflower oil-based diet (SO) followed by a 36-d experimental period during which fish were fed either a linseed oil-based diet (LO) (this treatment being called SO/LO) or a fish oil-based diet (FO) (this treatment being called SO/FO)...
January 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28107970/a-new-analytical-method-for-quantification-of-olive-and-palm-oil-in-blends-with-other-vegetable-edible-oils-based-on-the-chromatographic-fingerprints-from-the-methyl-transesterified-fraction
#8
Ana M Jiménez-Carvelo, Antonio González-Casado, Luis Cuadros-Rodríguez
A new analytical method for the quantification of olive oil and palm oil in blends with other vegetable edible oils (canola, safflower, corn, peanut, seeds, grapeseed, linseed, sesame and soybean) using normal phase liquid chromatography, and applying chemometric tools was developed. The procedure for obtaining of chromatographic fingerprint from the methyl-transesterified fraction from each blend is described. The multivariate quantification methods used were Partial Least Square-Regression (PLS-R) and Support Vector Regression (SVR)...
March 1, 2017: Talanta
https://www.readbyqxmd.com/read/28094903/evaluation-of-the-efficacy-of-insecticidal-coatings-based-on-teflutrin-and-chlorpyrifos-against-rhynchophorus-ferrugineus
#9
Massimo Pugliese, Alberto Rettori Andrea, Roberto Martinis, Khalid Al-Rohily, Velate Suresh, Moideen Mohamed Ashraf, Ali Al-Maashi
BACKGROUND: The date palm (Phoenix dactylifera L.) is an important economic resource for many nations worldwide, recently threatened by the presence of different insect pests, like the red palm weevil (RPW) Rhynchophorus ferrugineus. RESULTS: Two products, a glue (polyvinyl acetate) and an oil (raw linseed oil), have been used as coatings and applied together with a repellent and two insecticides (teflutrin and chlorpyrifos) at different dosages on 2 species of palm (Phoenix dactylifera and Phoenix canariensis)...
January 17, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28081221/dietary-lipid-sources-influence-fatty-acid-composition-in-tissue-of-large-yellow-croaker-larmichthys-crocea-by-regulating-triacylglycerol-synthesis-and-catabolism-at-the-transcriptional-level
#10
Hong Qiu, Min Jin, Yi Li, You Lu, Yingmei Hou, Qicun Zhou
An 8-week feeding trial was conducted to evaluate the effects of dietary lipid sources on growth performance, fatty acid composition, rate-limiting enzyme activities and gene expression related to lipid metabolism in large yellow croaker (Larmichthys crocea). Five iso-nitrogenous and iso-lipidic experimental diets were formulated to contain different lipid sources, such as fish oil (FO), soybean oil (SO), linseed oil (LO), rapeseed oil (RO) and peanut oil (PO), respectively. Triplicate groups of 50 fish (initial weight 13...
2017: PloS One
https://www.readbyqxmd.com/read/28076425/the-fatty-acid-profile-and-oxidative-stability-of-meat-from-turkeys-fed-diets-enriched-with-n-3-polyunsaturated-fatty-acids-and-dried-fruit-pomaces-as-a-source-of-polyphenols
#11
Jerzy Juskiewicz, Jan Jankowski, Henryk Zielinski, Zenon Zdunczyk, Dariusz Mikulski, Zofia Antoszkiewicz, Monika Kosmala, Przemyslaw Zdunczyk
The aim of this study was to determine the efficacy of different dietary fruit pomaces in reducing lipid oxidation in the meat of turkeys fed diets with a high content of n-3 polyunsaturated fatty acids (PUFAs). Over a period of 4 weeks before slaughter, turkeys were fed diets with the addition of 5% dried apple, blackcurrant, strawberry and seedless strawberry pomaces (groups AP, BP, SP and SSP, respectively) and 2.5% linseed oil. Pomaces differed in the content (from 5.5 in AP to 43.1 mg/g in SSP) and composition of polyphenols Proanthocyanidins were the main polyphenolic fraction in all pomaces, AP contained flavone glycosides and dihydrochalcones, BP contained anthocyanins, and SP and SSP-ellagitannins...
2017: PloS One
https://www.readbyqxmd.com/read/28074319/trans-fatty-acid-stimulated-mammary-gland-growth-in-ovariectomized-mice-is-fatty-acid-type-and-isomer-specific
#12
Grace E Berryhill, Susan G Miszewski, Josephine F Trott, Jana Kraft, Adam L Lock, Russell C Hovey
We previously reported that the trans-18:2 fatty acid trans-10, cis-12 conjugated linoleic acid (t10,c12-CLA) stimulates mammary gland development independent of estrogen and its receptor. Given the negative consequences of dietary trans-fatty acids on various aspects of human health, we sought to establish whether other trans-fatty acids could similarly induce ovary-independent mammary gland growth in mice. Prepubertal BALB/cJ mice were ovariectomized at 21 days of age then were fed diets enriched with cis-9, trans-11 CLA (c9,t11-CLA), or mixtures of trans-18:1 fatty acids supplied by partially hydrogenated sunflower, safflower, or linseed oil...
March 2017: Lipids
https://www.readbyqxmd.com/read/28067019/a-19th-century-ideal-oil-paint-medium-a-complex-hybrid-organic-inorganic-gel
#13
Laurence de Viguerie, Maguy Jaber, Hélène Pasco, Jacques Lalevée, Fabrice Morlet-Savary, Guylaine Ducouret, Baptiste Rigaud, Thierry Pouget, Clément Sanchez, Philippe Walter
British 19th century painters such as J. M. W. Turner, commonly modified the properties of their paint by using gels called "gumtions". These gels allowed them to easily tune the paint handling and drying properties. The fascinating properties of these "gumtions" were obtained by adding lead acetate to a ternary system based on mastic resin, linseed oil and turpentine. Herein, we report and investigate in depth the rheological properties of these gels as well as their structure at a molecular and supra-molecular scale...
January 9, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28035154/comparison-of-the-oxidative-stability-of-linseed-linum-usitatissimum-l-oil-by-pressure-differential-scanning-calorimetry-and-rancimat-measurements
#14
Edyta Symoniuk, Katarzyna Ratusz, Krzysztof Krygier
The aim of this study was to compare the oxidative stability of linseed oil using the pressure differential scanning calorimetry (PDSC) and Rancimat methods, and to determine the kinetic parameters of linseed oil oxidation. Five cold pressed linseed oils were oxidized at different temperatures under PDSC (90-140 °C) and Rancimat (70-140 °C) test conditions. The oxidative stability of the linseed oils was calculated based on induction times (PDSCτmax, Rancimat τon), the Arrhenius equation and activated complex theory, frequency factors (Z), the reaction rate coefficient (k) for all temperatures, activation energies (Ea), Q10 numbers, activation enthalpies (∆H(++)), and activation entropies (∆S(++))...
November 2016: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28003996/scavenger-receptor-class-b-type-i-a-cd36-related-protein-in-macrobrachium-nipponense-characterization-rna-interference-and-expression-analysis-with-different-dietary-lipid-sources
#15
Zhili Ding, Na Luo, Youqin Kong, Jingfen Li, Yixiang Zhang, Fang Cao, Jinyun Ye
The scavenger receptor class B, type I (SR-BI), is a member of the CD36 superfamily comprising transmembrane proteins involved in mammalian and fish lipid homeostasis regulation. We hypothesize that this receptor plays an important role in Macrobrachium nipponense lipid metabolism. However, little attention has been paid to SR-BI in commercial crustaceans. In the present study, we report a cDNA encoding M. nipponense scavenger receptor class B, type I (designated as MnSR-BI), obtained from a hepatopancreas cDNA library...
2016: International Journal of Genomics
https://www.readbyqxmd.com/read/27979162/one-input-class-and-two-input-class-classifications-for-differentiating-olive-oil-from-other-edible-vegetable-oils-by-use-of-the-normal-phase-liquid-chromatography-fingerprint-of-the-methyl-transesterified-fraction
#16
Ana M Jiménez-Carvelo, Estefanía Pérez-Castaño, Antonio González-Casado, Luis Cuadros-Rodríguez
A new method for differentiation of olive oil (independently of the quality category) from other vegetable oils (canola, safflower, corn, peanut, seeds, grapeseed, palm, linseed, sesame and soybean) has been developed. The analytical procedure for chromatographic fingerprinting of the methyl-transesterified fraction of each vegetable oil, using normal-phase liquid chromatography, is described and the chemometric strategies applied and discussed. Some chemometric methods, such as k-nearest neighbours (kNN), partial least squared-discriminant analysis (PLS-DA), support vector machine classification analysis (SVM-C), and soft independent modelling of class analogies (SIMCA), were applied to build classification models...
April 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27913275/dietary-fish-oil-replacement-by-linseed-oil-effect-on-growth-nutrient-utilization-tissue-fatty-acid-composition-and-desaturase-gene-expression-in-silver-barb-puntius-gonionotus-fingerlings
#17
Madhusmita Nayak, Ashis Saha, Avinash Pradhan, Mrinal Samanta, Shiba Shankar Giri
Silver barb (Puntius gonionotus) is considered a promising medium carp species for freshwater aquaculture in Asia. This study in silver barb was carried out to evaluate the effects of total or partial substitution of dietary fish oil (FO) with linseed oil (LO) on growth, nutrient utilization, whole-body composition, muscle and liver fatty acid composition. Fish (12.1±0.4g of initial body weight) were fed for 60days with five experimental iso-proteinous, iso-lipidic and iso-caloric diets in which FO (control diet) was replaced by 33...
March 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/27868251/dietary-linseed-oil-in-the-maternal-diet-affects-immunoglobulins-tissue-fatty-acid-composition-and-expression-of-lipid-metabolism-related-genes-in-piglets
#18
X L Chen, N Wang, M L Tian, L Wang, T Liu, X W Zhang, B M Shi, A S Shan
This experiment investigated the effects of supplementing the maternal diet with linseed oil (LSO) and soya bean oil (SBO) on immunoglobulins, the fatty acid composition and hepatic expression of lipid metabolism-related genes in piglets. Multiparous sows (twenty-four per diet) were fed on diets containing a supplement of either SBO or LSO during last week of gestation and lactation. The results indicated that supplementation of maternal diet with LSO could improve the weaning weight of piglets and average daily gain (ADG) (p < 0...
November 21, 2016: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/27847426/in-vitro-fermentation-characteristics-and-methane-reduction-potential-of-mustard-cake-brassica-juncea-l
#19
S M Durge, M K Tripathi, N Dutta
AIM: To assess the effect of mustard cake (Brassica juncea L.) levels in concentrate mixtures and in composite feed mixtures (CFMs) on in-vitro fermentation characteristics and methane production. MATERIALS AND METHODS: Five concentrate mixtures were prepared with containing 30% oil cake, where linseed cake was replaced by mustard cake at the rate of 0%, 7.5%, 15.0%, 22.5%, and 30% in concentrate mixture. Mustard cake contained glucosinolate 72.58 µmol/g oil free dry matter (DM) and contents in diet were 0, 5...
October 2016: Veterinary World
https://www.readbyqxmd.com/read/27809488/biocatalytic-synthesis-of-epoxy-resins-from-fatty-acids-as-a-versatile-route-for-the-formation-of-polymer-thermosets-with-tunable-properties
#20
Susana Torron, Stefan Semlitsch, Mats Martinelle, Mats Johansson
The work herein presented describes the synthesis and polymerization of series of bio-based epoxy resins prepared through lipase catalyzed transesterification. The epoxy-functional polyester resins with various architectures (linear, tri-branched, and tetra-branched) were synthesized through condensation of fatty acids derived from epoxidized soybean oil and linseed oil with three different hydroxyl cores under bulk conditions. The selectivity of the lipases toward esterification/transesterification reactions allowed the formation of macromers with up to 12 epoxides in the backbone...
December 12, 2016: Biomacromolecules
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