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https://www.readbyqxmd.com/read/28924085/an-improved-enzymatic-indirect-method-for-simultaneous-determinations-of-3-mcpd-esters-and-glycidyl-esters-in-fish-oils
#1
Kinuko Miyazaki, Kazuo Koyama
The enzymatic indirect method for simultaneous determinations of 3-chloro-1, 2-propanediol fatty acid esters (3-MCPD-Es) and glycidyl fatty acid esters (Gly-Es) make use of lipase from Candida cylindracea (previously referred to as C. rugosa). Because of low substrate specificity of the lipase for esters of polyunsaturated fatty acids (PUFA), such as docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA), fish oils high in PUFAs are currently excluded from the range of application of the method. The objective of this study was to make the enzymatic indirect method applicable to fats and oils containing PUFAs...
September 15, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/28912799/triportheus-albus-cope-1872-in-the-blackwater-clearwater-and-whitewater-of-the-amazon-a-case-of-phenotypic-plasticity
#2
José D A Araújo, Andrea Ghelfi, Adalberto L Val
The Amazon basin includes 1000s of bodies of water, that are sorted according to their color in three types: blackwater, clearwater, and whitewater, which significantly differ in terms of their physicochemical parameters. More than 3,000 species of fish live in the rivers of the Amazon, among them, the sardine, Triportheus albus, which is one of the few species that inhabit all three types of water. The purpose of our study was to analyze if the gene expression of T. albus is determined by the different types of water, that is, if the species presents phenotypic plasticity to live in blackwater, clearwater, and whitewater...
2017: Frontiers in Genetics
https://www.readbyqxmd.com/read/28911322/sharing-fishers%C3%A2-ethnoecological-knowledge-of-the-european-pilchard-sardina-pilchardus-in-the-westernmost-fishing-community-in-europe
#3
Heitor de Oliveira Braga, Miguel Ângelo Pardal, Ulisses Miranda Azeiteiro
BACKGROUND: With the present difficulties in the conservation of sardines in the North Atlantic, it is important to investigate the local ecological knowledge (LEK) of fishermen about the biology and ecology of these fish. The ethnoecological data of European pilchard provided by local fishermen can be of importance for the management and conservation of this fishery resource. Thus, the present study recorded the ethnoecological knowledge of S. pilchardus in the traditional fishing community of Peniche, Portugal...
September 14, 2017: Journal of Ethnobiology and Ethnomedicine
https://www.readbyqxmd.com/read/28898945/microplastic-and-mesoplastic-contamination-in-canned-sardines-and-sprats
#4
Ali Karami, Abolfazl Golieskardi, Cheng Keong Choo, Vincent Larat, Samaneh Karbalaei, Babak Salamatinia
No report was found on the occurrence of microplastics in processed seafood products that are manufactured for direct human consumption. This study investigates the potential presence of micro- and mesoplastics in 20 brands of canned sardines and sprats originating from 13 countries over 4 continents followed by their chemical composition determination using micro-Raman spectroscopy. The particles were further inspected for their inorganic composition through energy-dispersive X-ray spectroscopy (EDX). Plastic particles were absent in 16 brands while between 1 and 3 plastic particles per brand were found in the other 4 brands...
September 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28873724/combinative-effect-of-sardine-peptides-and-quercetin-alleviates-hypertension-through-inhibition-of-angiotensin-i-converting-enzyme-activity-and-inflammation
#5
Jianming Luo, Cheng Zhang, Qianyue Liu, Shiyi Ou, Lili Zhang, Xichun Peng
Hypertension had relation to angiotensin I converting enzyme (ACE) activity and inflammation. In our previous research, sardine peptides (SP) with ACE inhibitory activity were prepared. However, the combinative effect of SP and quercetin (QC) on hypertension alleviation was still unknown. In the present study, the antihypertensive effect of SP and QC was discovered and the optimal proportion of SP and QC (v/v=8:2, with 20.00mg/mL of SP and 12.99μg/mL of QC for their original concentrations) was screened on ACE activity inhibition in vitro...
October 2017: Food Research International
https://www.readbyqxmd.com/read/28873723/substrates-emulsification-process-to-improve-lipase-catalyzed-sardine-oil-glycerolysis-in-different-systems-evaluation-of-lipid-oxidation-of-the-reaction-products
#6
Ángela García Solaesa, María Teresa Sanz, Rodrigo Melgosa, Sagrario Beltrán
Mono- and diacylglycerols rich in omega-3 have a great interest due to their good bioavailability and oxidation stability compared with other kind of omega-3 concentrates. The main drawback in mono- and diacylglycerols production by glycerolysis is the immiscibility of the substrates, oil and glycerol. To improve mass transfer rates, avoiding the use of organic solvents, emulsification of both reactants as reverse micelles (glycerol-in-oil) was carried out previous to lipase-catalyzed sardine oil glycerolysis...
October 2017: Food Research International
https://www.readbyqxmd.com/read/28869529/different-covalent-immobilizations-modulate-lipase-activities-of-hypocrea-pseudokoningii
#7
Marita G Pereira, Susana Velasco-Lozano, Sonia Moreno-Perez, Aline M Polizeli, Paulo R Heinen, Fernanda D A Facchini, Ana C Vici, Mariana Cereia, Benevides C Pessela, Gloria Fernandez-Lorente, Jose M Guisan, João A Jorge, Maria de Lourdes T M Polizeli
Enzyme immobilization can promote several advantages for their industrial application. In this work, a lipase from Hypocrea pseudokoningii was efficiently linked to four chemical supports: agarose activated with cyanogen bromide (CNBr), glyoxyl-agarose (GX), MANAE-agarose activated with glutaraldehyde (GA) and GA-crosslinked with glutaraldehyde. Results showed a more stable lipase with both the GA-crosslinked and GA derivatives, compared to the control (CNBr), at 50 °C, 60 °C and 70 °C. Moreover, all derivatives were stabilized when incubated with organic solvents at 50%, such as ethanol, methanol, n-propanol and cyclohexane...
September 4, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28832597/decadal-scale-variation-in-diet-forecasts-persistently-poor-breeding-under-ocean-warming-in-a-tropical-seabird
#8
Emily M Tompkins, Howard M Townsend, David J Anderson
Climate change effects on population dynamics of natural populations are well documented at higher latitudes, where relatively rapid warming illuminates cause-effect relationships, but not in the tropics and especially the marine tropics, where warming has been slow. Here we forecast the indirect effect of ocean warming on a top predator, Nazca boobies in the equatorial Galápagos Islands, where rising water temperature is expected to exceed the upper thermal tolerance of a key prey item in the future, severely reducing its availability within the boobies' foraging envelope...
2017: PloS One
https://www.readbyqxmd.com/read/28821102/microencapsulation-of-sardine-oil-application-of-vanillic-acid-grafted-chitosan-as-a-bio-functional-wall-material
#9
K V Vishnu, Niladri S Chatterjee, K K Ajeeshkumar, R G K Lekshmi, C S Tejpal, Suseela Mathew, C N Ravishankar
Vanillic acid grafted chitosan (Va-g-Ch) was evaluated as a new antioxidant wall material for microencapsulation of polyunsaturated fatty acid rich sardine oil. A high grafting ratio of 305mg vanillic acid equivalent/g of polymer was achieved using a free radical mediated grafting reaction. Oil in water emulsion was prepared with an optimised combination of Va-g-Ch and Tween 20 (3.2:1). Sardine oil loaded microparticles (SO-M) were produced (∼75% yield) by spray drying. The average diameter and polydispersity Index (PDI) of the particles were found to be 2...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28766116/sardine-oil-loaded-vanillic-acid-grafted-chitosan-microparticles-a-new-functional-food-ingredient-attenuates-myocardial-oxidative-stress-and-apoptosis-in-cardiomyoblast-cell-lines-h9c2
#10
K V Vishnu, K K Ajeesh Kumar, Niladri S Chatterjee, R G K Lekshmi, P R Sreerekha, Suseela Mathew, C N Ravishankar
Fish oil has been widely recognized as an excellent dietary source of polyunsaturated n-3 fatty acids such as EPA and DHA. However, it can undergo oxidation easily resulting in the formation of toxic off flavor compounds such as hydroperoxides. These compounds adversely affect the nutritional quality and may induce several stress reactions in body. To solve this problem, a new antioxidant bio-material, vanillic acid-grafted chitosan (Va-g-Ch), was synthesized and used as a wall material for microencapsulation of fish oil...
August 2, 2017: Cell Stress & Chaperones
https://www.readbyqxmd.com/read/28726095/fatty-acid-composition-of-fish-species-with-different-feeding-habits-from-an-arctic-lake
#11
M I Gladyshev, N N Sushchik, L A Glushchenko, V A Zadelenov, A E Rudchenko, Y Y Dgebuadze
We compared the composition and content of fatty acids (FAs) in fish with different feeding habits (sardine (least) cisco Coregonus sardinella, goggle-eyed charr (pucheglazka) form of Salvelinus alpinus complex, humpback whitefish Coregonus pidschian, broad whitefish Coregonus nasus, boganid charr Salvelinus boganidae, and northern pike Esox lucius from an Arctic Lake. Feeding habits of the studied fish (planktivore, benthivore, or piscivore) significantly affected the composition of biomarker fatty acids and the ratio of stable isotopes of carbon and nitrogen in their biomass...
May 2017: Doklady. Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28718014/protein-hydrolysate-from-canned-sardine-and-brewing-by-products-improves-tnf-%C3%AE-induced-inflammation-in-an-intestinal-endothelial-co-culture-cell-model
#12
Elsa F Vieira, John Van Camp, Isabel M P L V O Ferreira, Charlotte Grootaert
PURPOSE: The anti-inflammatory activity of sardine protein hydrolysates (SPH) obtained by hydrolysis with proteases from brewing yeast surplus was ascertained. METHODS: For this purpose, a digested and desalted SPH fraction with molecular weight lower than 10 kDa was investigated using an endothelial cell line (EA.hy926) as such and in a co-culture model with an intestinal cell line (Caco-2). Effects of SPH <10 kDa on nitric oxide (NO) production, reactive oxygen species (ROS) inhibition and secretion of monocyte chemoattractant protein 1 (MCP-1), vascular endothelial growth factor (VEGF), chemokine IL-8 (IL-8) and intercellular adhesion molecule-1 (ICAM-1) were evaluated in TNF-α-treated and untreated cells...
July 17, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28673910/injury-mediated-decrease-in-locomotor-performance-increases-predation-risk-in-schooling-fish
#13
J Krause, J E Herbert-Read, F Seebacher, P Domenici, A D M Wilson, S Marras, M B S Svendsen, D Strömbom, J F Steffensen, S Krause, P E Viblanc, P Couillaud, P Bach, P S Sabarros, P Zaslansky, R H J M Kurvers
The costs and benefits of group living often depend on the spatial position of individuals within groups and the ability of individuals to occupy preferred positions. For example, models of predation events for moving prey groups predict higher mortality risk for individuals at the periphery and front of groups. We investigated these predictions in sardine (Sardinella aurita) schools under attack from group hunting sailfish (Istiophorus platypterus) in the open ocean. Sailfish approached sardine schools about equally often from the front and rear, but prior to attack there was a chasing period in which sardines attempted to swim away from the predator...
August 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28654685/spatial-variability-of-spanish-sardine-sardinella-aurita-abundance-as-related-to-the-upwelling-cycle-off-the-southeastern-caribbean-sea
#14
Digna Rueda-Roa, Jeremy Mendoza, Frank Muller-Karger, Juan José Cárdenas, Alina Achury, Yrene Astor
The Sardinella aurita fishery off northeastern Venezuela, region of seasonal wind-driven coastal-upwelling, accounts for 90% of the Caribbean Sea small pelagic catch. This law-protected artisanal fishery takes place up to ~10 km offshore. The spatial distribution, number of schools, and biomass of S. aurita were studied using eight hydro-acoustic surveys (1995-1998). The study included the analysis of satellite-derived sea surface temperature and chlorophyll-a. Surveys were grouped by strong, weak, and transitional upwelling seasons...
2017: PloS One
https://www.readbyqxmd.com/read/28614698/sardine-procalcitonin-amino-terminal-cleavage-peptide-has-a-different-action-from-calcitonin-and-promotes-osteoblastic-activity-in-the-scales-of-goldfish
#15
Yoichi Kase, Takahiro Ikari, Toshio Sekiguchi, Masayuki Sato, Shouzo Ogiso, Tsuyoshi Kawada, Shin Matsubara, Honoo Satake, Yuichi Sasayama, Masato Endo, Kei-Ichiro Kitamura, Atsuhiko Hattori, Takushi X Watanabe, Yusuke Maruyama, Yoshinari Watanabe, Hisayuki Funahashi, Akira Kambegawa, Nobuo Suzuki
The nucleotide sequence of a sardine preprocalcitonin precursor has been determined from their ultimobranchial glands in the present study. From our analysis of this sequence, we found that sardine procalcitonin was composed of procalcitonin amino-terminal cleavage peptide (N-proCT) (53 amino acids), CT (32 amino acids), and procalcitonin carboxyl-terminal cleavage peptide (C-proCT) (18 amino acids). As compared with C-proCT, N-proCT has been highly conserved among teleosts, reptiles, and birds, which suggests that N-proCT has some bioactivities...
September 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28575780/tourism-as-a-driver-of-conflicts-and-changes-in-fisheries-value-chains-in-marine-protected-areas
#16
P F M Lopes, L Mendes, V Fonseca, S Villasante
Although critical tools for protecting ocean habitats, Marine Protected Areas (MPAs) are sometimes challenged for social impacts and conflicts they may generate. Some conflicts have an economic base, which, once understood, can be used to resolve associated socioenvironmental problems. We addressed how the fish trade in an MPA that combines no-take zones and tourist or resident zones creates incentives for increased fisheries. We performed a value chain analysis following the fish supply and trade through interviews that assessed consumer demand and preference...
May 30, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28571867/arsenic-speciation-in-fish-from-greek-coastal-areas
#17
Ioanna Kalantzi, Kyriaki Mylona, Katerina Sofoulaki, Manolis Tsapakis, Spiros A Pergantis
Arsenic speciation analysis was conducted on fish samples (sardine and anchovy) collected from six areas along the Greek coastline, i.e. Artemisium Straits, Thermaikos Gulf, Amvrakikos Gulf, Strymonian Gulf, Thracian Sea, and Elefsina Gulf. Total arsenic levels ranging from 11.8 to 62.6mg As/kg dry weight were determined. Arsenobetaine, a non-toxic form of arsenic, was found to be the main arsenic species, present at 8.6 to 58.8mg As/kg dry weight, accounting for 67-95% of the total arsenic. Also detected in all fish samples was dimethylarsinic acid, although at considerably lower concentrations, ranging from 0...
June 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28566349/lateralisation-helps-sailfish-snatch-sardines
#18
C Ruth Archer
No abstract text is available yet for this article.
June 1, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28508436/bio-functional-properties-of-sardine-protein-hydrolysates-obtained-by-brewer-s-spent-yeast-and-commercial-proteases
#19
Elsa F Vieira, Olívia Pinho, Isabel Mplvo Ferreira
BACKGROUND: Canned sardine industry generates large amounts of protein rich waste, which demands a useful exploitation. This paper describes the potential use of muscle and viscera proteins from canned sardine by-products as substrate to obtain hydrolysates with biological and functional properties. Three enzymatic approaches, brewer's spent yeast (Bsy) proteases, Alcalase® and Neutrase® were applied to perform protein hydrolysis at the same proteolytic activity (1 U mL(-1) ), using an enzyme/substrate ratio of 20% (v/v), at 50 °C and for 7 h...
May 16, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28490104/first-approach-to-assess-the-bioaccessibility-of-bisphenol-a-in-canned-seafood
#20
Sara C Cunha, Ricardo N Alves, José O Fernandes, Susana Casal, António Marques
Human health risks due to bisphenol A (BPA) exposure through canned food consumption are an emerging safety concern worldwide. In this study, an in vitro digestion model was used to simulate human digestion and evaluate BPA bioaccessibility in canned seafood for the first time. BPA contents of canned tuna and sardine samples and their bioaccessible and non-bioaccessible fractions were determined by gas chromatography coupled to mass spectrometry (GC-MS). The 21 samples of canned tuna and sardines, all from the same producer but with different kind of sauces, showed BPA levels ranging from <1µgkg(-1) (limit of quantification, LOQ) to 62µgkg(-1), with variable results within and between sample groups...
October 1, 2017: Food Chemistry
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