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Abdulkadir Bayr H brahim Halilolu A Necdet Sirkeciolu N Mevlüt Aras 《Journal of the science of food and agriculture》2006,86(1):163-168
The muscle fatty acid (FA) composition of 12 selected marine fish species living in Turkish waters was determined. FA profiles of muscle were compared in terms of total and individual saturated (SFAs) and unsaturated fatty acids. Total SFA, monounsaturated fatty acid (MUFA), n‐3 polyunsaturated fatty acid (n‐3 PUFA) and n‐6 polyunsaturated fatty acid (n‐6 PUFA) contents as well as n‐3/n‐6 FA and eicosapentaenoic acid (EPA)/docosahexaenoic acid (DHA) ratios differed (P < 0.01) in all fish species. Palmitic acid (16:0) among total SFAs, oleic acid (18:1n‐9) among MUFAs, DHA (22:6n‐3) among n‐3 PUFAs and 18:2n‐6 and 20:4n‐6 among n‐6 PUFAs were the most abundant FAs. The ratio of n‐3/n‐6 PUFA contents, indicating the availability of n‐3 PUFAs that are beneficial for human health, ranged from 2.67 to 12.61. The EPA/DHA ratio was between 0.17 and 0.83 in the marine fish species studied. Copyright © 2005 Society of Chemical Industry 相似文献
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Mehmet Ayvaz Safiye İpek Ayvaz İbrahim Aydin 《International Journal of Hydrogen Energy》2018,43(44):20271-20283
Consumption of the fossil fuels causes greenhouse gas effect and environmental pollution, which are two basic problems of our age. As a result of this problem, clean and renewable alternative energy sources are beginning to replace fossil fuels. Nowadays, the use of hydrogen energy, which is one of the clean energy, is increasing in transportation and industrial areas. Increasing of hydrogen energy usage, scientists are attempting to solve the many safety problems (such as fire, burst, impact and hydrogen embrittlement) that can occur during the storage and consumption of hydrogen energy. In this study, during the event of fire, the safety of metallic Type I pressure hydrogen storage tanks is investigated by using a novel approach. In this new approach, the mechanical strength drops of the tank materials that is related with temperature rising are added to the safety calculations. In the study, 6061 T6 aluminum and SS 316L stainless steel alloys were used as hydrogen tank material. The safety of hydrogen tanks modelled using these alloys was investigated under different temperature conditions (22, 100, 200 and 300 °C) and internal pressure (15, 20 and 25 MPa). 相似文献
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İbrahim Doymaz 《Journal of Food Processing and Preservation》2015,39(6):2738-2745
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Halil İbrahim Ulusoy Ramazan Gürkan Özlem Demir Songül Ulusoy 《Food Analytical Methods》2012,5(3):454-463
A new method has been developed for preconcentration of cobalt at trace levels in beverage samples using calcon carboxylic
acid as chelating agent and cetyl pyridinium chloride as an auxiliary ligand and entrapped into Triton X-114 prior to its
determination by flame atomic absorption spectrometry (FAAS). The main parameters affecting cloud point extraction (CPE) efficiency
such as pH, concentration of the complexing agent, cationic and nonionic surfactant concentration, salt effect, the equilibrium
time, and temperature were investigated and optimized. After optimization of the CPE conditions, a preconcentration factor
of 60, an enhancement factor of 106, and a detection limit of 0.20 μg L−1 by (R
2 = 0.9978) were obtained from a calibration curve constructed in the range of 0.7–100 μg L−1. The proposed preconcentration procedure was successfully applied to the determination of cobalt ions in some real samples
including natural drinking water, tap water, and beer and wine samples. The accuracy and validity of the proposed CPE/FAAS
method was tested by means of five repeated analysis of reference standard materials (TM-253, a low level fortified water
standard for trace elements). A good agreement between analytical results (28.8 and 28.5 μg L−1 with calibration curve and standard addition curve method, respectively) and certified value (27.9 μg L−1) for Co (p < 0.05) were obtained and verified by means of calibration curve and standard addition curve method using CPE procedure. 相似文献