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by
M. Rezaei |
Total Records (
14 ) for
M. Rezaei |
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M. Rezaei
and
H. Hafezian
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An experiment was conduced to evaluate the inclusion of high fiber Sunflower Meal (SFM) in commercial layer diets in a completely randomized design with 4 treatments, 8 replicates and 4 hens in each replicate. After determining chemical composition of sunflower meal 4 diets with equal CP (14.5%) and other nutrients except energy containing 0, 5, 10, 15 percent of high fiber sunflower meal were formulated. During the experiment feed consumption, hen-day egg production, egg weight, feed conversion ratio, haugh unit, egg specific gravity and mortality, were measured weekly. In the beginning and the end of the experiment body weight of the hens were measured individually. The results indicated that use of 10 percent of sunflower meal hadn`t significant effect on feed consumption, hen-day egg production. However increasing sunflower meal up to 15 percent decreased feed consumption, egg production and egg weight, 5.70, 7.06 and 5.49 percent respectively, while feed conversion ratio increased significantly (p<0.05). Egg parameters were not affected by the SFM inclusion rate. According to the results of this experiment it can be concluded that 10 percent of high fiber sunflower meal can be used in laying hen diets without adverse effect on performance and egg parameters. |
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M. Ghiyasi
,
M. Rezaei
and
H. Sayyahzadeh
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This study was conducted to evaluate the effects of
prebiotic (Fermacto) in low protein diet on performance and carcass
characteristics of broiler chicks. One hundred and fifty six 1-day old
Ross 308 broiler chicks of both sexes were used for 42-days. The chicks
were randomly allocated to 12 pens containing 13 chicks each with 3
replicates and assigned to receive one of the 4 dietary treatments of 2
levels of protein (low and high) and 2 levels of prebiotic (0 and 0.2%) in
a completely randomized design with factorial arrangement. There was not
significant difference in feed conversation ratio, Feed intake and tights
weight among treatments. Significant differences were observed in carcass
weight and abdominal fat percentage between high protein diet without
prebiotic and low protein diet containing prebiotic (p<0.05). The
results of the present experiment showed that addition of prebiotic to
broiler diets containing 90% of NRC protein recommendation had same effect
with control diet on performance of broiler chicks. |
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H. Hajati
,
M. Rezaei
and
H. Sayyahzadeh
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In a completely randomized design the effects of a multi-enzyme (Endo-feed-W) supplementation on performance, carcass characteristics and some blood parameters of Cobb 500 broilers fed on corn-soybean meal-wheat diets were studied. The enzyme levels added to the diets were 0.00% (control) and 500mg kg-1 DM. Enzyme supplementation significantly improved body weight gain, feed to gain ratio, relative growth, energy and protein efficiency from 11-28 d of age. Adding enzyme significantly increased body weight gain, decreased feed intake and improved feed to gain ratio, energy and protein efficiency from 29-44 d of age (p<0.05). Body weight gain, feed intake, relative growth, energy and protein efficiency was increased and feed to gain ratio was decreased by enzyme supplementation from 29-44 d (p<0.05). Enzyme addition significantly increased carcass and thigh percentages at 44 d of age. Adding enzyme significantly increased the concentration of blood triiodothyronine (T3) at 28 and 42 d and reduced the concentration of blood thyroxin (T4) at 42 d of age. Enzyme inclusion increased the concentration of blood total cholesterol at 10, 28 and 42 d of age, however HDL-cholesterol and triglyceride concentrations increased at d 10 and 42 (p<0.05). The concentration of blood uric acid was significantly decreased at d 28 and 42 in broilers fed enzyme supplemented diets. |
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H. Hajati
and
M. Rezaei
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For several decades, antibiotics and chemotherapeutics in prophylactic doses have been used in poultry diet to improve their welfare and to obtain economic benefits in terms of improved animal performance and reduced medication costs. With increasing concerns about antibiotic resistance, there is increasing interest in finding alternatives to antibiotics for poultry production. Prebiotics are one of the alternatives that can improve poultry performance through altering gut microflora. Furthermore, high protein prices and environmental concerns have pressured the industry to search for methods for reducing dietary protein levels. |
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M. Rezaei
and
S.A.R. Movahedi Naeini
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Information about the adsorption and desorption kinetics of potassium and the consequent alterations with zeolite additions are limited in Golestan Province loess soils with illite dominance in the clay fraction. The kinetics of potassium adsorption and desorption with different KCl concentrations (0, 40, 60, 80, 110 and 140 mg L-1) and KCl+NH4Cl concentrations (K80,N60; K80,N120; K60,N60; K110, N120; K80, N90 and K110, N90 mg L-1) on the soil, the zeolite and their incorporation (within 2 and 1800 h) were investigated with this research using batch method. Potassium adsorption and desorption was initially fast (first 48 h) but continued with low speed (after 48 h) until the end of the experiment. Results shown increasing of K+ concentration increased rate of adsorption and desorption in soil, zeolite and their incorporation and zeolite increased adsorption and decreased desorption rate by incorporation with soil. Ammonium presence decreased potassium adsorption and it increased potassium desorption. K/NH4 desorption rate did not follow exactly K/NH4 adsorption ratio for all treatments. The kinetic equations used to estimate data were zero order, first order, simple Elovich, parabolic diffusion and power function. The Elovich model described the adsorption and desorption processes on soil and soil with zeolit (0.88<R2<0.99). Elovich and power function models described adsorption and desorption processes, respectively for zeolite well (0.65<R2<0.97). The models indicated that K+ adsorption and desorption was diffusion controlled. Potassium adsorption and release by batch method did not simulate potassium uptake by wheat. |
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A. Musavi
,
S.A. Mirghelenj
and
M. Rezaei
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An experiment was conducted to study the effects of microbial phytase, metabolizable energy and available phosphorus on performance and carcass characteristics and mineral content of tibia bone in broiler chickens. Five hundred and forty days old ross male broiler chicks allocated to 9 treatments in a 2x2x2 factorial arrangement with two levels of phytase enzyme (0 and 500 FTU), two levels of metabolizable energy (recommended and 106 kcal kg-1 less than recommended) and available phosphorus (50 and 75% of recommended level) and a control group (with recommended phosphorus and no enzyme supplementation), with 4 replicates of 15 chicks in a completely randomized experimental design. The use of phytase enzyme had significant effect on feed intake, body weight gain (whole period), breast and thigh percentage of body weight (p<0.05). There were significant differences among energy effects on feed intake, body weight gain and FCR (p<0.05). The effect of diet containing 75 and 50% of recommended available phosphorus on feed intake, body weight gain, FCR, breast and thigh percentage and Ca and P content of tibia bone were significantly different (p<0.05). The Interaction of energy and phosphorus effect on feed intake, body weight gain, FCR and P content of tibia bone were significant (p<0.05). Results of this experiment revealed that the use of phytase enzyme in diets containing 75% of recommended available phosphorus had the best performance without considering energy. |
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M. Rezaei
,
S.H. Mohebali
,
Y. Khamis Abadi
,
E. Suri
,
A. Zare
,
S.H. Malamir
,
E. Sheikh Rasuli
and
H. Maadi
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Brucella are very small, gram-negative coccobacilli that cause a zoonosis called brucellosis. These bacteria enter the body through mucous membranes. The blood carries Brucella to organs such as the liver, spleen, bone marrow and kidneys where they cause lesions. Symptoms of brucellosis include fluctuating fever, chills, sweating, headache, muscle pain and weight loss. One species of Brucella called B. abortus infects the placenta and fetus of gestating cows and causes the fetus to abort. When humans are infected by this organism they develop a severe fever. Cow and sheep production in this region is an important livelihood source. In this study, 300 milk samples were collected from villages of Toyserkan City in seasons autumn 2009 were collected randomly from cows and sheeps of different ages This milk samples were examined for detecting Brucella abortus and Brucella melitensis with Milk Ring Test (MRT). From 300 milk samples which collected from milk samples about B. abortus 21 (14%) and B. melitensis 18 (12%) showed positive reaction with Milk Ring Test. |
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M. Rezaei
and
B. Movahed
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The aim of this study is to approach the problems of estimating permeability values and identifying lithofacies from some conventional well logs through the use of a proposed method based on fuzzy logic inference. Fuzzy logic is inherently well suited to characterizing vague and imperfectly defined knowledge, a situation encountered in most geological data. It can thus yield models that are simpler and more robust than those based on crisp logic. The method is simple, easy to comprehend and robust which could be perfectly suitable for analyzing lithologies and permeability values of horizontal wells, which are almost never cored, especially if core data is available for nearby vertical wells. In this study, core analysis of some wells and the established fuzzy relations are used to get the lithofacies description and permeability values in wells having only log data. In addition, a sensitivity analysis assigned to the capability of the model to predict lithotypes correctly when describing from the most basic lithology (sand or shale), to the most detailed seven core derived categories. The method is also able to calculate, for each analysis, confidence measures that are indicative of how well the analysis procedure can identify those facies given uncertainties in the data. The problem with permeability is rather complex as it relates more to aperture of pore throats rather than pore size. In addition, determining permeability from well logs is further complicated by the problem of scale. The proposed fuzzy technique has advantages when contrasted with other techniques that rely on multivariate statistics and neural networks. This method is simpler, easier to retrain, more reproducible, noniterative and more computer efficient which uses much basic log data sets rather than depending on new logging technology. Moreover, we can apply constraints derived from human experience and geologic principles to guide the inference process. |
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M. Rezaei
and
S.A.R. Movahedi Naeini
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The rate of K+ release from soils can significantly influence K+ fertility of soils. The objectives of this study were investigated the effect of different calcium concentrations (0, 0.028, 0.057, 0.085, 0.128 and 0.171 mg L-1) and different ammonium concentrations (0, 40, 60, 90, 120 and 140 mg L-1) on potassium isothermal desorption kinetics of diluted suspensions of a soil, the Iranian natural clinoptilolite zeolite and their incorporation (within 2 and 1800 h), application of some kinetic models and correlation between potassium desorption kinetic coefficients of the best models with the calcium concentration. Potassium desorption was initially fast (first 192 h) with Ca2+ and NH4+ addition and continued during next stage (192-1800 h) with low speed until the end of the experiment. Also, increasing the Ca2+ and NH4+ solution concentration increased the potassium desorption in all of treatments. The potassium released from NH4+ treatments was more than Ca2+ treatment in equal equivalent of Ca2+ and NH4+. Zeolite decreased K+ desorption rate by incorption with soil. The kinetic equations used to estimate data were zero order, first order, simple Elovich, parabolic diffusion and power function. The Elovich model described the desorption processes on soil and soil+zeolit and zeolite in NH4+ treatment (0.6282<0.990). Elovich, first order, zero order and power function models described desorption processes, respectively for zeolite well (0.872<0.97). The models indicated that K+ desorption was diffusion controlled. Result shows that zeolite release K+ slowly. |
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S. Alfaaouri
,
M.A. Riahi
,
N. Alizadeh
and
M. Rezaei
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The objective of this study is to construct a comprehensive, interdisciplinary and quantitative characterization of a carbonate oil reservoir in Marine oil field. Another purpose is to testify the performance of a mounted fuzzy logic inference technique in carbonates to predict permeability values. In addition, Tixtier modification of common Wyllie-Rose formula is also applied. In each case a blind testing was used to define model prediction accuracy. Furthermore, detailed error analysis in different permeability increments was also mounted to have a better comparison. In this study the geological reservoir model is developed in two steps, first the reservoir skeleton of the field was constructed and then the reservoir properties were distributed within that structure model applying the stochastic approach. One of the most common methods for permeability prediction is the technique proposed by Wyllie and Rose and then modified by Tixtier to be use in carbonate deposits. In addition, during this study a fuzzy-logic inference technique was also applied to predict permeability values. Finally, a sensitivity analysis was mounted on the methods for distributing permeability within the reservoir skeleton grid. First, the Sequential Gaussian Simulation approach was simply applied. Then, seismic cubic impedance and seismic phase information was used as a secondary variable in two separate studies. Furthermore, using the properly constructed reservoir model the hydrocarbon in place was quantified applying the deterministic approach. |
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S. Alfaouri
,
M. Ali Riahi
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N. Alizadeh
and
M. Rezaei
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The aim of this study was to modify some previous Fuzzy based models for developing a convenient and robust method for permeability problem solving in carbonates. The proposed technique is tested in two complex giant Iranian oil fields for justification; which are Sarvak and Asmari formations. The results were much more precise than previous similar Fuzzy studies which were in high agreement with core measured values. Permeability values estimation using core-derived information of wells with just electric logs is an old problem in reservoir characterization. In essence, the problem consists in finding some explicit relation between log and core data in those wells that contain both types of information. Then, describe reservoir features (derived from core data) of wells with log information only. Fuzzy logic is one of the intelligent techniques that have been applied extensively nowadays, but all the previous researches in this subject have been applied in Sandy reservoir cases. In this study, besides the previous studies a new Fuzzy model has been testified to estimate permeability values in two carbonate reservoirs. Moreover, the accuracy of the predicted results will be considered comparing with the measured core values. During this study a new modification in defuzzification stage will be introduced to make the method much more accurate and flexible in predicting permeability values in carbonates. Results show that the new proposed method yields better estimations than similar previous techniques in carbonate reservoirs. Furthermore, the predicted results represented in the actual range of core plugs permeability measures. |
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M. Rezaei
,
R. Boostani
and
M. Rezaei
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Although Non-negative Matrix Factorization (NMF) has been employed in many real applications but it still suffers from three shortcomings in terms of finding a suitable initialization method, choosing an effective cost function in addition with determining the suitable reduced dimension (Factors Rank). The aim of this study is to enhance NMF performance using Fuzzy C-Means Clustering (FCM) as an efficient initialization method for estimating initial factors of NMF. In this paper, we proposed an initialization in which both W and H matrices are identified simultaneously. The proposed method was applied to JAFFE facial expression dataset and the results exhibited superiority of this method compare to other the state-of-art initialization methods on the employed dataset. |
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M. Rezaei
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The increasing price of feedstuffs used for poultry diets imposes nutritionists to look for new cheaper ingredients able to replace the expensive feeds. Use of mixed rice bran in layer ration was studied during the period of 13 weeks in an experiment with Completely Randomized Design (CRD). After determination of chemical composition, six diets were formulated by using of 0, 5, 10, 15, 20 and 25% of mixed rice bran (diets 1-6). During the experiment, feed intake, egg production, egg mass, egg weight, feed: egg, egg specific gravity, haugh unit score, body weight changes and mortality were measured. The results indicated that use of mixed rice bran up to 25% is profitable and had no significant effect on each of above traits except for egg mass (p<0.05). Diets containing 10 and 15% of mixed rice bran (diets 3, 4) had the best values for egg weight, egg mass and feed conversion ratio. It is concluded that feeding laying hen with maize-soybean meal diets containing 25% mixed rice bran was practically feasible without compromising performance. |
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