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Akhbari M.,Islamic Azad University at Kashan | Zahiri A.,Islamic Republic of Iran | Bassam S.J.E.,Institute of Technical and Vocational Higher Education
Fibres and Textiles in Eastern Europe

In this study, five parameters of a mercerising machine, four parameters of untreated yarn and three parameters of the caustic soda bath affecting the tensile strength of mercerised yarn were investigated. Experiments were designed with the aid of the Response Surface Method. Accordingly different types of yarns were mercerised on different machines and with production settings, then relevant trends were studied. Results show that the strength of the mercerised yarn is highly affected by the cylinder normal pressure, warm rinsing temperature and caustic soda bath concentration, while the effect of the cold rinsing temperature is observed only for higher qualities of cotton fibers and yarns. Increasing the cylinder rotation duration results in a reduction in the strength of carded yarns, but has little effect on combed yarns. Results also show that optimum settings are highly affected by the type of cotton fiber, yarn structure and number of plies, but the linear density of single yarn and the mercerising machine type have no significant effect. Source

Irandoust H.,Institute of Technical and Vocational Higher Education | Ahn D.U.,Iowa State University
Poultry Science

An experiment was conducted to determine the effects of adding vitamins E and C to diets containing 3.5% refined soy oil (SO), recycled soy oil (RSO), or acidulated soy oil soapstocks (ASS) on 1) fatty acid (FA) profile, and cholesterol, triglyceride (TG) and α-tocopherol (α-T) concentrations of yolk, and 2) the oxidation status of serum and yolk. Twelve dietary treatments, using 3 oil sources, 2 levels of vitamin E (0 vs. 250 mg/kg), and 2 levels of vitamin C (0 vs. 250 mg/kg), were prepared. A total of 300 W36 Hy-line laying hens, from 44 to 56 weeks of age, were placed in 60 cages (5 birds/cage) and 5 cages were randomly assigned to one of the 12 diets. Blood samples and eggs were collected after 84 d on trial. No interactions among main effects were found for any of the traits studied. Oil sources had little effects on the FA profile of the yolk, except for C18:3 that was higher (P-value of < 0.01) in the hens fed SO than those fed RSO or ASS. Vitamin E supplementation significantly (P-value of < 0.05) increased the concentration of C16:0, C18:0, and C16:1 but decreased that of C18:2 and C22:6n3 in the yolk. Vitamin C supplementation significantly (P-value of < 0.05) increased C18:0 and C18:3 concentrations in the yolk but decreased the n6 to n3 FA ratio. The concentrations of cholesterol and triglyceride in serum and yolk were not affected by dietary treatment but α-tocopherol concentration increased (P-value of < 0.01) by the dietary vitamin E. Compared with the hens fed the SO diets, malondialdehyde (MDA) concentration in serum was higher with RSO diet but lower with ASS diet. Vitamin E and vitamin C supplementation decreased (P-value of < 0.05) serum MDA. Yolk FA profile was affected not only by the FA profile of the oil source used in diet, but also by the supplementation of vitamin E and C. The results showed that triglyceride profile, but not cholesterol content, of egg was affected by fatty acid profile of the supplemental oil and the vitamin C and E supplementations. © 2015 Poultry Science Association Inc. Source

Mortazavi M.,Institute of Technical and Vocational Higher Education | Ranaei H.,Shiraz University | Abbasi H.,Tarbiat Modares University
Iranian Journal of Fisheries Sciences

The ultimate goal of an agriculture research system is on-time, correct and clear response to the problems and expectations of agriculture household and stakeholders. In this respect, though, due to variation and frequency of the problems and expectations and as well as many limitations such as financial deficit, short time and shortage in work force and equipments etc, the system cannot be thoroughly responsive. Therefore, the necessity for optimizing the system to response through prioritizing the research projects has been a major challenge before the responsible managers and authorities. In this paper, the Analytical Hierarchical Process (AHP) has been introduced as a well known Multi Attribute Decision Methods (MADM) that combines qualitative and quantitative criteria for prioritizing the research projects of the Iranian Fisheries Research Organization. For implementation of the mentioned principles and methods of prioritizing the research projects have been studied and then by determining the final decision making criteria, the priority of the projects in the Institute have been determined by drawing decision hierarchy tree. Required data was gathered through pair wise comparison questionnaires filled by the experts and researchers. In the next step, Expert Choice software used to analyze and determine the priorities. Based on results criteria of research possibility, scientific development, economic development, and stability development with respective weight. 377,. 263,. 187, and. 173 are the most important criteria for the institute in the south area of Caspian Sea. Finally, according to the produced results, the priorities of the six studied research programs determined. Source

Mehdi N.H.,Islamic Azad University at Khorasgan | Majid T.,Islamic Azad University at Khorasgan | Hossein I.,Institute of Technical and Vocational Higher Education
International Journal of Poultry Science

The experiment was conducted to investigate the effect of different ratio of pellet and mash diets on performance and gut development of Japanese quails. A total of 600 quails were used in completely randomized design with 6 dietary treatments and 5 replicates of 20 quails. Dietary treatments were included of: (A) control group (100% mash); (B) 50% mash+50% pellet; (C) 75% mash+25% pellet; (D) 25% mash+75% pellet; (E) choice feeding (pellet or mash) and (F) 100% pellet. Performance parameters were determined in different growth periods. Carcass characteristics, digestive organs weight and intestinal morphology were measured at 35 day of age by slaughtering two birds per pen. Feed consumption in diet C significantly decreased and in diet D increased (p<0.05). Quails fed with diet D had the maximum daily weight gain (p<0.05). Dietary treatments had no significant effect on feed conversion ratio. The best carcass yield, greatest villus height and crypt depth in jejunum was observed in quails in diet D. Small intestine length, pancreas and proventriculus weight were not significantly affected by dietary treatments. In conclusion, feeding quails by 25% mash+75% pellet diets improved growth performance and morphometric characteristics of small intestine. © Asian Network for Scientific Information, 2015. Source

Yasemi M.,Institute of Technical and Vocational Higher Education | Poursaeid S.,Guilan University | Shakoorian M.,International Sturgeon Research Institute | Falahatkar B.,Guilan University
Journal of Applied Ichthyology

The objective of this study was to evaluate the best practical management to rearing of great sturgeon from early stages to the time of releasing. Three 4ha earthen ponds were considered for this aim. About 12500 juveniles of great sturgeon with an average weight of 2.5±0.1g were stockedha-1. Rearing in the ponds was carried out for 2months. Water quality, live food biomass in ponds, diet composition in gut, and the growth of fish were measured and monitored during the culture period. Fish reached the weight of 39g with the survival rate of 70%. Specific growth rate for weight (SGRW), weight gain (WG) and condition factor (CF) were 4.59%day-1, 1468, and 0.44%, respectively at the end of the experiment. The examination of gut contents of fish indicated that Cladocera, mainly various kinds of Daphnia constituted the most feed consumed. The results of this study showed that the quality of water and live food produced in earthen ponds has an influence on the growth rate and survival of great sturgeon and if the conditions are sufficient, higher growth and survival rates will be expected. © 2011 Blackwell Verlag, Berlin. Source

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