Paper Type	::	Research Paper
Title	::	A Novel Approach for Efficient and Convenient E-Auction
Country	::	Bangladesh
Authors	::	Amita Chakraborty ||, Md. Golam Moazzam ||, Shamima Nasrin ||, Mohammad Zahidur Rahman
Page No.	::	01-06
	::	10.9790/3021-03440106
		0.4/3021-03440106
		3021-0304-0406

This paper presents a novel approach for efficient and convenient e-auction by comparing the performance between first-price and second-price sealed bid auction. This studied entry and bidding patterns in first-price and second-price sealed bid auction and documented a set of systematic effects on these two auctions. It is found that the first-price auction gives rise to larger levels of efficiency and revenue, but lower payoffs to the bidders. The latter finding is the second-price auction is a dominant strategy for a buyer to drop out of the bidding when the asking price reaches his or her valuation. This paper first demonstrates on the implementation of first-price and second-price sealed bid auction. Then it talks about the concerns about comparison between them.

 

Keywords: E-commerce, e-Auction, First-price sealed bid auction, Online sealed bid auction, Security and privacy, Vickrey auction.

[1]. Doyle, Robert A.; Baska, Steve, History of Auctions: From ancient Rome to todays high-tech auctions, (November 2002)
[2]. Pekec, Aleksandar; Rothkopf, Michael H., Combinatorial Auction Design, Management Science NFORMS) 49 (11): 1485–1503, November 2003.
[3]. Krishna, Vijay, Auction Theory, San Diego, USA: Academic Press, ISBN 0-12-426297-X, 2002
[4]. Milgrom, Paul, Putting Auction Theory to Work, Cambridge, United Kingdom: Cambridge University Press, ISBN 0-521-55184-6, 2004.
[5]. Shubik, Martin, The Theory of Money and Financial Institutions: Volume 1, Cambridge , Mass., USA: MIT Press, pp. 213–219, ISBN 0-262-69311-9, March 2004.

Paper Type	::	Review Paper
Title	::	Harmonic Reduction of Arc Furnaces Using D-Statcom
Country	::	India
Authors	::	S.Pushpavalli ||, A. CordeliaSumathy
Page No.	::	07-14
	::	10.9790/3021-03440714
		0.4/3021-03440714
		3021-0304-0414

Arc furnaces are used in industries for induction heating and welding. Due to the rapid growth of non-linear loads, such as power electronic control equipments and Electric arc furnace (EAF) power quality problems such as harmonics and voltage flicker are introduced in the power system. It occurs because of the time-varying and non-linear behaviour of the electric arc furnace operation. Hence an Electric arc furnace model is needed to analyze the power quality. In this paper, a time domain model called hyperbolic model for electric arc furnace is analyzed using MATLAB. The model is used to study its behaviour on the power system using MATLAB. To improve the power quality D-STATCOM is proposed, in which the control strategies used are Direct, Indirect control and Hysteresis controller. Direct control technique uses P-Q theory in which transformation is based on orthogonal reference frame. Indirect control technique uses d-q theory in which transformation is based on synchronous reference frame. Hysteresis controller uses Hysteresis Bandwidth to produce the switching signals. Control strategies used in D-statcom are simulated using MATLAB/SIMULINK.

[1]. K.Anuradha, B.P.Muni "Modeling of Electric Arc Furnace & Control Algorithms for voltage flicker mitigation using DSTATCOM", IEEE 2009
[2]. Y. Najafi Sarem, M. H. Amrollahi, M. Babanejad, Sh. Mounesirad & M. Abbasi Layegh and Davood habibinia, " Electric Arc Furnace Power Modeling for STATCOM Controller Application", International Symposium on Power Electronics,Electrical Drives, Automation and Motion 2010
[3]. A. Alzate, A. Escobar, J. J. Marulanda, "Application of a D-STATCOM to Mitigate Arc Furnaces Power Quality Problems", I EEE Trondheim Power Tech, 2011 .
[4]. C. Bhonsle, R.B. Kelkar, "Simulation of Electric Arc Furnace Characteristics for Voltage Flicker study using MATLAB", International Conference on Recent Advancements in Electrical, Electronics and Control Engineering, 2011
[5]. M .NagaRaju, Dr .K .Anuradha, Dr. G. R. K. Murthy, A.Santha Kumari," Voltage flicker mitigation by DSTATCOM for voltage source Arc furnace model" IEEE 2011

Paper Type	::	Review Paper
Title	::	Iris Based Authentication System
Country	::	India
Authors	::	R.Shanthi ||,, B.Dinesh
Page No.	::	15-20
	::	10.9790/3021-03441520
		0.4/3021-03441520
		3021-0304-0420

A biometric system provides automatic identification of an individual based on a unique feature or characteristic possessed by the individual. Iris recognition is regarded as the most reliable and accurate biometric identification system available. Iris recognition is an automated method of biometric identification that uses mathematical pattern-recognition techniques on images of the irises of an individual's eyes, whose complex random patterns are unique. In this work it is proposed to implement an iris recognition system, where circular Hough transform and Canny edge detection is used to segment the iris region. A template of the detected region is created using Daugman algorithm and template matching for recognition is based on Hamming distance. The results shows that the proposed method is efficient for iris based biometric recognition.

 

Keywords: Gabor Wavelet, Hamming distance, Hough Transform, Iris Recognition, Template Matching

[1]. J. Daugman. How iris recognition works. Proceedings of 2002 International Conference on Image Processing, Vol. 1, 2002.
[2]. ]J.Daugman. Biometric personal identification system based on iris analysis. United States Patent, Patent Number: 5,291,560, 1994.
[3]. J. Daugman. High confidence visual recognition of persons by a test of statistical independence. IEEE Transactions on Pattern Analysis and Machine Intelligence, Vol. 15, No. 11, 1993.
[4]. R. Wildes, J. Asmuth, G. Green, S. Hsu, R. Kolczynski, J. Matey, S. McBride.A system for automated iris recognition. Proceedings IEEE Workshop on Applications of Computer Vision, Sarasota, FL, pp. 121-128, 1994.
[5]. W. Kong, D. Zhang. Accurate iris segmentation based on novel reflection and eyelash detection model. Proceedings of 2001,International Symposium on Intelligent Multimedia, Video and Speech Processing, Hong Kong, 2001.

Paper Type	::	Research Paper
Title	::	Effect of certain agronomic practices for the management of wilt of pigeonpea in Manipur agro-climatic conditions
Country	::	India
Authors	::	T. Ranjana Devi ||, GKN Chhetry
Page No.	::	21-23
	::	10.9790/3021-03442123
		0.4/3021-03442123
		3021-0304-0423

Field experiments were conducted during 2009-10 and 2010-11 in rainfed conditions on sandy soil to ascertain the effect of various agronomic practices such as application of farm yard manure (FYM), poultry manure (PM), mixture of FYM and PM (FYM+PM), soil solarization and intercropping (pigeonpea: maize) on wilt of two local varieties of pigeonpea (V1: early maturing variety and V2: late maturing variety). Among the different treatments soil solarization was more effective in controlling wilt disease of pigeonpea to the extent of (37.21%) in early maturing variety (V1) and (44.37%) in late maturing variety (V2) as compared to other treatments.

 

Keywords: FYM, Intercropping, PM, Soil solarization, wilt

[1]. P.K.Ghosh, P.Ramesh , K.K. Bandyopadhyay , A.K. Tripathi , K.M. Hati , A.K. Misra , C.L. Acharya, Comparative effectiveness of cattle manure, poultry manure, phosphocompost and fertilizer-NPK on three cropping systems in vertisols of semi-arid tropics.I, Crop yields and system performance, Bioresource Technology, 95, 2004, 77-83.
[2]. Y.S.Chauhan , Y.L. Nene , C. Johansen ,M.P. Haware , N.P. Saxena , Sardar Singh, S.B.Sharma , K.L. Sahawat , J.R. Burford , O.P. Rupela , J.V.D.K. Kumar Rao , and S. Sithanantham , Effect of soli solarization on pigeonpea and chickpea. Research Bulletin No. 11, International Crop Research Institute for the semi-arid tropics, Patancheru, A.P. 502304, India, 1998,1-2.
[3]. C.D. Mayee and V.V. Datar , Phytopathometry (Ed. C.D. Mayee and V.V. Datar, Marathwada Agricultural University, Parbhani, Maharastra,1986) 63-64.
[4]. Nitin Chawla, S.Gangopadhyay , Integration of organic amendments and bioagents in suppressing cumin wilt caused by Fusarium oxysporum f. sp. cumini. Indian Phytopath, 62 (2), 2009 , 209-216.
[5]. Narendra Singh and R.S. Singh , Effect of oil-cake amended soil atmosphere on pigeonpea wilt pathogen, Indian Phytopath., 35(2), 1982 , 300-305.

Paper Type	::	Research Paper
Title	::	Design and Comparison of Dual Coaxial and edge feed Square Micro Strip Patch Antenna for Wind Profiling Radar Applications at 430 Mhz
Country	::	India
Authors	::	Debajyoti Chatterjee ||, Dr. P.V.Y Jayasree ||, Dr.P.Srinivasulu
Page No.	::	24-33
	::	10.9790/3021-03442433
		0.4/3021-03442433
		3021-0304-0433

In the recent years the development in communication systems requires the development of low cost, minimal weight and low profile antennas that are capable of maintaining high performance over a wide spectrum of frequencies. This technological trend has focused much effort into the design of a microstrip patch antenna. This paper focuses on the design, model and simulation of a microstrip patch antenna which operates at 430 MHz by applying two well known and mostly used feeding techniques. Those are coaxial feeding and the strip line feeding. The proposed antenna is excited through these two feeding techniques and the antenna design has been executed and simulated using IE3D software. Therefore, method of moments based IE3D software is used to design a Microstrip Patch Antenna with dual Polarization using Dual feed line.We have seen the behaviour of important parameters of a square patch in both co-axial as well as edge feed or strip line feed. IE3D is an integrated full-wave electromagnetic simulation and optimization package for the analysis and design of 3D and planar microwave circuits, MMIC, RFIC, RFID, antennas, digital circuits and high speed Printed Circuit Board (PCB). The IE3D has become the most versatile, easy to use, efficient and accurate electromagnetic simulation tool. The length of the antenna is nearly half wavelength in the dielectric it is a very critical parameter, which governs the resonant frequency of the antenna. In view of design, selection of the patch width and length are the major parameters along with the feed line dimensions. Desired patch antenna design was simulated by IE3D simulator program. The entire project is being carried out at National Atmospheric Research Laboratory (NARL), ISRO.

 

Key Words: IE3D, Micro strip Patch, RADAR, Wind profiler

[1]. Srinivasulu. P, Manas R Padhy, Yasodha. P and NarayanaRao. T, 2010 "Development of UHF wind profiling radar for lower atmospheric research applications". Conference paper at NARL.
[2]. Srinivasulu. P, Yasodha. P, Rajendra Prasad. T and Narayana Reddy. S 2010 "Development of 1280 MHz Active Array RADAR at NARL". Conference Paper at NARL DRAWS-2010.
[3]. C.T.P.Song, P.S.Hall and H.G.Shiraz, "Multiband Multiple Ring Monopole Antennas" IEEE Trans. on Antennas and propagation, vol. 51,No.4 pp. 722–729, April. 2003.
[4]. Karaboga, D., K. Guney, S. Sagiroglu, and M. Erler, \Neural computation of resonant frequency of electrically thin and thick rectangular microstrip antennas," IEEE Proceedings | Microwaves, Antennas and Propagation, Vol. 146, No. 2, 155{159, Apr. 1999.
[5]. Mishra, R. K. and A. Patnaik, \Neural network-based CAD model for the design of square-patch antennas," IEEE Trans. on Antennas Propagat., Vol. 46, No. 12, 1890{1891, Dec. 1998.

Paper Type	::	Research Paper
Title	::	Study on the Development of Decision Making Using Intuitionistic Fuzzy Set (IFS) and Interval Valued Intuitionistic Fuzzy Set (IVIFS)
Country	::	India
Authors	::	Yasir Ahmad ||, Sadia Husain ||, Irfan Sayeed Asthanvi
Page No.	::	34-42
	::	10.9790/3021-03443442
		0.4/3021-03443442
		3021-0304-0442

Out of several higher order fuzzy sets [1], the concept of an intuitionistic fuzzy set (IFS) [2] introduced by Atanassov has been found to be highly useful to deal with vagueness and imprecision. IFS theory has been extensively applied to areas like Artificial Intelligence, networking, Soft decision making, Programming logic, operational research etc. One the promising role of IFS has been emerged in Decision making problems specially group decision making and multi-attribute decision making. In some real-life situations, decision makers may not be able to accurately express their view for the problem as they may not possess a precise or sufficient level of knowledge of the problem or the decision makers are unable to discriminate explicitly the degree to which one alternative are better than others in such cases, the decision maker may provide their preferences for alternatives to a certain degree, but it is possible that they are not so sure about it [3]. Thus, it is very suitable to express the decision maker preference values with the use of fuzzy/intuitionistic fuzzy values rather than exact numerical values or linguistic variables [4]. To satisfy the need of decision making problem with imprecision and uncertainty many researchers have been concentrated on IFS theory. In this paper we reviewed the development of different approaches for solving decision making problem using IFS theory and a brief introduction on the role of Interval Valued IF sets (IVIFS) [5] in multiattribute decision making.

 

Keywords: Intuitionistic fuzzy sets (IFS), Multicriteria Decision Making (MCDM), Interval Valued Intuitionistic fuzzy sets (IVIFS)

[1]. L. A. Zadeh, "Fuzzy sets", Information and Control 8 (3) (1965) 338–353.
[2]. K.T. Atanassov, ―Intuitionistic fuzzy sets‖, Fuzzy Sets and Systems 20 (1986) 87–96.

[3]. F. Herrera, L. Martinez, P.J. Sanchez, ―Managing non-homogeneous information in group decision making‖, European Journal of Operational Research 166 (2005) 115–132.
[4]. E. Szmidt, J. Kacprzyk, ―Using intuitionistic fuzzy sets in group decision making‖, Control and Cybernetics 31 (2002) 1037–1053.
[5]. K.T. Atanassov, G.Gargov, Interval valued intuitionistic fuzzy sets [J],Fuzzy Sets and Systems. 1989, 31, 343-349.

Paper Type	::	Review Paper
Title	::	Secure Data Accumulation and Certification Procedure for Sensor Networks
Country	::	India
Authors	::	Kuttyamma A.J ||, Chinchu Krishna.S
Page No.	::	43-46
	::	10.9790/3021-03444346
		0.4/3021-03444346
		3021-0304-0446

The Wireless Sensor Network appears as an emerging technology which consists of thousands of small and low cost sensors. These sensors have limited power, computation, storage and communication capabilities. The data aggregation framework process is required which combines the data coming from various sensors, remove the redundancies in those data and then enroot them. In this paper, we have proposed a secure data aggregation protocol for wireless sensor networks (WSNs) that is robust to deceitful nodes. The goal of this protocol is to guarantee the essential security needs (like authentication, data confidentiality & data integrity) as well as to achieve the low communication overhead and be fitted with various aggregation functions (like sum, average, max, min etc.).To achieve these security needs, it uses symmetric encryption and message authentication code. Encryption ensures data confidentiality while message authentication code ensures authentication and data integrity. An anomaly detection algorithm is used to detect the anomaly or outliers and thus prevent the deceitful corrupted data from being contributed to the final aggregated results.

 

Keywords: Wireless Sensor Network,Data aggregation.

[1]. Mahimkar, T.S. Rappaport , "Secure DAV: a secure data aggregation and verification protocol for wireless sensor networks",In Proceedings of the 47th IEEE Global Telecommunications Conference on (Globecom), November 29–December 3,Dallas, TX,2004.
[2]. Perrig, R. Szwezyk, A. Woo, S. Hollar , D . Culler , and J. Tygar, "SPINS: security protocols for sensor networks," in mobile computing and networking, 2001,pp.189-199.
[3]. C. Intanagonwiwat, R. Govindan, D. Estrin , J. Heidemann , F. silva , "Directed diffusion for wireless sensor networking," in : proceeding of IEEE/ACM Transactions on Networking, Vol.11, 2003, pp. 2-16.
[4]. K. Wu, D. Dreef, B. Sun, Y. Xiao,Secure data aggregation without persistent cryptographic operations in wireless sensor networks, AdHoc Networks 5 (1) (2007) 100–111.
[5]. L. Hu, D. Evans, Secure aggregation for wireless networks, in:Proceedings of the Workshop on security and Assurance in Ad Hoc Networks, Orlando, FL, 28 January 2003.

Paper Type	::	Research Paper
Title	::	Strength of Ternary Blended Cement Sandcrete Containing Cassava Waste Ash and Oil Palm Bunch Ash
Country	::	Nigeria
Authors	::	L. O. Ettu ||, J. C. Ezeh ||, M. S. W. Mbajiorgu
Page No.	::	47-51
	::	10.9790/3021-03444751
		0.4/3021-03444751
		3021-0304-0451

This work investigated the compressive strength of ternary blended cement sandcrete containing cassava waste ash (CWA) and oil palm bunch ash (OPBA). 105 sandcrete cubes of 150mm x 150mm x 150mm were produced with OPC-CWA binary blended cement, 105 with OPC-OPBA binary blended cement, and 105 with OPC-CWA-OPBA ternary blended cement, each at percentage OPC replacement with pozzolan of 5%, 10%, 15%, 20%, and 25%. Three cubes for each percentage replacement of OPC with pozzolan and the control were tested for saturated surface dry bulk density and crushed to obtain their compressive strengths at 3, 7, 14, 21, 28, 50, and 90 days of curing. The 90-day strengths obtained from ternary blending of OPC with equal proportions of CWA and OPBA were 11.70N/mm2 for 5% replacement, 11.10N/mm2 for 10% replacement, 10.80N/mm2 for 15% replacement, 10.00N/mm2 for 20% replacement, and 9.60N/mm2 for 25% replacement, while that of the control was 10.80N/mm2. This shows that very high sandcrete strength values could be obtained with OPC-CWA-OPBA ternary blended cement with high quality control at longer days of hydration. Thus, OPC-CWA-OPBA ternary blended cement sandcrete could be used for various civil engineering and building works where early strength is not a major requirement.

 

Key Words: Binary blended cement, ternary blended cement, sandcrete, pozzolan, cassava waste ash, oil palm bunch ash.

[1]. Adewuyi, A.P., & Ola, B. F. (2005). Application of waterworks sludge as partial replacement for cement in concrete production. Science Focus Journal, 10(1): 123-130.
[2]. Agbede, I. O., & Obam, S. O. (2008). Compressive Strength of Rice Husk Ash-Cement Sandcrete Blocks. Global Journal of Engineering Research, Vol. 7 (1), pp. 43-46.
[3]. Bakar, B. H. A., Putrajaya, R. C., & Abdulaziz, H. (2010). Malaysian Saw dust ash –Improving the Durability and Corrosion Resistance of Concrete: Pre-review. Concrete Research Letters, 1 (1): 6-13, March 2010.
[4]. Cisse, I. K., & Laquerbe, M. (2000). Mechanical characterization of sandcretes with rice husk ash additions: study applied to Senegal. Cement and Concrete Research, 30 (1): p.13– 18.
[5]. Cordeiro, G. C., Filho, R. D. T., & Fairbairn, E. D. R. (2009). Use of ultrafine saw dust ash with high-carbon content as pozzolan in high performance concrete. Materials and Structures, 42: 983–992. DOI 10.1617/s11527-008-9437-z.

Paper Type	::	Research Paper
Title	::	Structural and Optical Properties of MnO2: Pb Nanocrystalline Thin Films Deposited By Chemical Spray Pyrolysis
Country	::	Iraq
Authors	::	Ahmad H. Al-Falahi
Page No.	::	52-57
	::	10.9790/3021-03445257
		0.4/3021-03445257
		3021-0304-0457

MnO2 thin films were deposited by chemical spray pyrolysis method on glass substrates and then doped by pb:3% and 5%. Structural properties of the prepared films were studied by means of x-ray diffraction (XRD), all patterns of the films are polycrystalline. The surface morphology of the films were investigated by using atomic force microscope (AFM) technique. The optical properties were studied by UV-VIS spectropho-meter, the absorption coefficient and optical band gap were calculated. Extinction coefficient, refractive index, and the dielectric constant were investigated.

 

Keywords: Chemical spray pyrolysis, MnO2: pb thin films, Structural and optical properties, X-ray diffraction.

[1] P.U.Asogwa ,S.C.Ezugwu ,F.I.Ezema ,superficies y Vacio 23 (1) 18-22,marzo de ( 2010).
[2] H.Y.Xu,S.L.Xu,X.D.Li,H.Wangand .Yan, App.Surf.Sci 252,4091(2006).
[3] X. Huang, D. Lv, H. Yue, Attia and Y. ang, Nanotechnology 19,225606 (2008).
[4] P.U.Asogwa,Journal of optoelectronicsand biomedical materials,Vol.2,Issue 3,July-Septemper (2010),p.109-117.
[5] S.Karamat,S.Mahmood,J.J.Lin,Z.Y.Pan,P.Lee,T.L.Tan,S,V,Springh-am,R.V.Ramanujan,R.S.Rawat,AppliedSurfaceScience 254(2008)7258-7289.

Paper Type	::	Research Paper
Title	::	Experimental Investigation on Torsional Rigidity of Power Screws
Country	::	India
Authors	::	A.Purushotham
Page No.	::	58-61
	::	10.9790/3021-03445861
		0.4/3021-03445861
		3021-0304-0461

The lead crews or power screws are very important components in machine tools, power transmission equipment and in general machinery. These components are often subjected to twisting moments. As cross section of power screw is not solid circle, the torsion expression available in simple torsion theory is not useful for the estimation of torque carrying capacity. In this paper two analytical models have been developed to evaluate torsion rigidity of power screws. To validate the results obtained from these developed models, an experimental set up is built up in this work.

 

Key Words: Lead screw, torsion rigidity, stress function.

[1] Couloumb, "Historie del" Academie" 19984
[2] Navier, "Resume des Lecons sur 1" Application de la mecanique",3rd Ed, Paris. 1964
[3] Saint Venant, "Memories Savants Etrangers‟ vol.14, 1855.
[4] Muskhelishvili, N.I., Some basic problems of the Mathematical Theory of Elasticity, P.Noordhoff, Gronigen, Holland, 1953.
[5] Sokolnikoff, I.S., Mathematical Theory of Elasticity Mc Graw Hill Book, Co., Inc., New York, N.Y., 1956.

Paper Type	::	Research Paper
Title	::	Cholesterol Oxidation Control in Mayonnaise Using Aframomum danielli Antioxidant Extracts
Country	::	Nigeria
Authors	::	Etti, C.J ||, Adegoke, G. O ||, Etti, I. C
Page No.	::	62-66
	::	10.9790/3021-03446266
		0.4/3021-03446266
		3021-0304-0466

A study was carried out to monitor the control of cholesterol oxidation in mayonnaise using Aframomum danielli (A. danielli) antioxidant extracts. Mayonnaise samples were treated with A. danielli antioxidant extracts from diethyl ether, ethanol, n-hexane and that of a synthetic antioxidant butylated hydroxyl anisole (BHA) and these samples were assessed for control cholesterol oxidation. The yield of A. danielli antioxidant extracts from the different solvents was highest in diethyl ether solvent (13.07%), followed by the yield from ethanol solvent (12.90%) while n-hexane solvent gave the lowest yield (10.95%). Using high performance liquid chromatography (HPLC), the percentage cholesterol anti-oxidation effectiveness in mayonnaise indicated that Aframomum danielli antioxidant extracts at 200 part per million (ppm) concentration from the solvents diethyl ether, ethanol and n-hexane were 93.96%, 99.54% and 94.94%respectively compared to 82.00% of synthetic antioxidant butylated hydroxyl anisole (BHA) on the 60th day of mayonnaise storage, making Aframomum danielli extracts to be than synthetic antioxidant extracts BHA in the control of cholesterol oxidation in mayonnaise.

 

Key words: Antioxidant extracts, Aframomum danielli, Cholesterol oxidation, Mayonnaise, BHA

[1] A. Valenzuela, J. Sanhueza, and S. Nieto, "Natural antioxidants in functional foods: from food safety to health benefits Grasas and Aceites in Press," 2003.
[2] S. Kubow, "Lipid oxidation products in food and atherogenesis," Nut. Rev., vol. 51, pp. 33-40, 1993.
[3] S. K. Kim and W. W. Nawar, "Oxidative interactions of cholesterol with triglycerides," J. Am. Oil Chem.Soc., vol. 68, pp. 931-934, 1991.
[4] J. H. Lee, D. W. Shoeman, S. S. Kim, and A. S. Csallany, "The effects of superoxide anion in the production of seven major cholesterol oxidation products in aprotic and protic conditions," Int. J. Food Sci. Nutr, vol. 48, pp. 151-159, 1977.
[5] A. Valenzuela and S. Nieto, "Natural and synthetic antioxidants: Food quality protectors," Grasas and Aceites, vol. 47, pp. 186-196, 1996.