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Articles by G.A. Moghadam
Total Records ( 6 ) for G.A. Moghadam
  A. Taghizadeh , M. Hatami , G.A. Moghadam , A.M. Tahmasbi , H. Janmohamadi , N. Pirani and R. Noori
  The effects of chemical treated corn silage (using urea and formaldehyde) on rumen ecosystem (pH, sedimentation and floatation, methylene blue reduction, total VFA, rumen ammonia) and blood metabolites (urea and glucose) in sheep were investigated. Sixteen sheep (41.85±4.6 kg) were used in a 4-treatment completely randomly design. The treatment contented: Corn Silage (CS), Corn Silage treated Urea(10 g kg-1)(CSU), Corn Silage treated Formaldehyde(4 g kg-1) (CSF), Corn silage treated urea (10 g kg-1) and formaldehyde (4 g kg-1) (CSFU). The ruminal pH had significant differences between treatments (p<0.05). The sedimentation andfloatation time, methylene blue reduction, total VFA showed no significant differences between treatments. The ruminal ammonia nitrogen in CUS was significantly more than the other treatments. The blood urea nitrogen in CSU and CSFU was more than the other treatments (p<0.05). There was no significant differences for blood glucose concentration among treatments. This study indicated that formaldehyde decreased ruminal ammonia nitrogen, resulting high escaped protein and offer users flexibility in formulating rations according to the productive performance of target animals.
  A. Taghizadeh , H. Janmohamadi , G.A. Moghadam and J. Shodja
  The in vitro gas production technique was used for determine of fermentation characteristics of barley grain and corn grain. Triplicate samples were used for measuring gas production. The data were fitted by equation of P = A(1-ect) that P is gas production at time t, A is gas production of soluble and insoluble fraction, c is rate of gas production and t is time of incubation. The gas production was measured at 2, 4, 6, 8, 12, 16, 24, 36 and 48 h. The gas production of corn grain at 2 h was lower than barley grain (p<0.05), that can be resulted from slow degradation of starch in corn grain compared to barley grain. However, the sum of gas production of soluble and insoluble (a+b) in corn grain was significantly more than barley grain. The rate of gas production of barley grain was higher than the corn grain. The pattern of fermentation for corn grain differed from that in the barley grain.
  R. Asadpour , H. Tayefi-Nasrabadi , G.A. Moghadam and K. Nofouzi
  This study was conducted to determine the levels and relationship between Lacto Peroxidase (LP) activity and somatic cell count (SCC) for diagnosis subclinical mastitis in early lactation of dairy cows. Foremilk samples were obtained from quarters of 80 cows (August 2007 up to February 2008). Any cows had not evidence of clinical mastitis at time of sampling. The SCC ranged from 5.24105 cells/mL in the first parity to 5.5105 in the third parity with a mean value of 5.45105. The mean LP activity in first, second and third parity were found 6.49, 4.63 U and 5.5 U mL 1, respectively. No significant correlation (r = 0, p>0.05) was found between number of SCC and LP values in early lactation. Since, the measurement of LP activity of milk may not be used as a predictor subclinical mastitis in the early lactation period of dairy cows.
  R. Asadpour , H. Tayefi-Nasrabadi , G.A. Moghadam and K. Nofouzi
  Association between values for the Somatic Cell Count (SCC) and intramammary infection (IMI) were studied in 80 dairy cows from dairy herd in Iran during the first 5-15 days post calving. Samples were cultured for bacterial presence and were tested for SCC. Intramammary infection was defined as the presence of one or two bacterial species in milk samples taken within 5-15 day postcalving. Prevalence of IMI was large; 65% of milk samples were infected. Approximately 30% of the cows classified as infected with Coagulase-negative Staphylococci (CNS) and S. aureus had the pathogen identified on 5-15 days post calving. Streptococcus agalactia accounted for 10% of the IMI. Remaining IMI were by other pathogeneses among which Escherichia coli, Proteus sp., Klebsiella sp. Arcanobacter pyogenes. All milk samples from dairy cows in early lactation had SCC ranged from 5.24105 cells mL 1 in the first parity to 5.5105 in the third parity with a mean value of 5.45105. No significant differences were observed (p>0.05) in SCC values between parities. Also, no significant differences were found (p>0.05) between SCC values and infections. Thus, these testing strategies may not be ideal for making decisions about individual animals, such as identifying individual cow with S. aureus for segregated milking.
  A. Taghizadeh , M. Hatami , G.A. Moghadam and A.M. Tahmasbi
  Samples of unfractionated forage, isolated NDF and residue insoluble in 90% Ethanol were fermented in vitro and gas production was monitored. The gas volume associated with the ethanol soluble (A fraction) was determined as the difference between the gas from the whole forage and from the ethanol residue.The gas yield associated with the fraction insoluble in 90% ethanol but soluble in neutral detergent soluble (B1 fraction) was determined by subtracting the isolated NDF gas curve from the corresponding ethanol residue curve. This experiment included untreated Corn Silage (CS) and chemically treated corn silage. The rate of gas formation from the A fraction was approximately rather than (p<0.05) the B1 fraction. The gas production of A fraction was less than (p<0.05) the B1 fraction. The CS was treated with urea (10g kg-1) or formaldehyde (4g kg-1). Cumulative gas production was recorded at 2, 4, 8, 12, 16, 24, 36, 48, 72 and 96 h of incubation and McDonald equation was used to describe the kinetics of gas production. Treatment with urea decreased (p<0.05) gas production at 96 h by 217.6 vs 236.7, 240.0, 232.56, 254.0 (mL g 1) for CS, Formaldehyde treated (CSF), urea and formaldehyde treated (CSFU), residue insoluble in 90% ethanol (EIR) and isolated NDF, respectively. The maximum rate of gas production decreased (p<0.05) in CS from 0.028 to 0.023, 0.025, 0.027, 0.0235 and 0.0268 for CSU, CSF, CSFU, EIR and isolated NDF, respectively. The gas production of soluble and insoluble fractions (a+b) decreased (p<0.05) from 261.8 in EIR to 241.8, 240, 225.0 238.7 and 239.3 mL g 1 for CS, CSU, CSF, CSFU and isolated NDF, respectively. The gas production at 96 h in EIR was (p<0.05) rather than the other treatments. Associative effects were calculated as the difference between the observed gas production for mixture of urea and formaldehyde and the individual inclusion (urea or formaldehyde). Associative effects generally observed as decreasing of gas production with duration of incubation. The strong correlation between extent of gas production in incubation times and on dry matter in situ disappearance was obtained. The poor correlation in initial times between gas production and in vitro dry matter and in situ dry matter disappearance observed resulting the improved production of in vitro and in situ dry matter disappearance from gas production in later times of incubation due to all potential components were fermented and produced gas. It is concluded that the associative effects cause decreasing of gas production specially in CSU and also resulted the difference between of the gas formation and the rate of gas production of the A fraction and the B fraction. There is strong positive correlation between gas production with in vitro and in situ dry matter disappearances.
  H. Paya , A. Taghizadeh , H. Janamohamadi and G.A. Moghadam
  The in situ ruminal dry matter (DM) and crude protein (CP) degradation and in vitro DM and CP disappearance of corn grain, soybean meal, wheat bran and alfalfa were compared. For in situ technique duplicate dacron bags were incubated for 0, 2, 4, 6, 8, 12, 16, 24, 36, 48, 72 and 96 h in two wethers fitted with ruminal cannulas. The in vitro degradability of DM and CP calculated at 0, 2, 12, 36 and 48 h incubation time for test feeds. The model of Ørskov and McDonald as y = a + b (1-e-ct) was used for determination of degradation characteristics for both of methods. Wheat bran had higher soluble DM (a) (30.3%), corn grain had higher insoluble potentially degradable DM (b) (59.9%) and soybean meal had higher degradation rate (9.67% h 1) than other feeds, inverses corn grain (14%), alfalfa (40.1%) and alfalfa (3.40% h 1) had lower soluble DM, insoluble potentially degradable DM and degradation rate than other feeds, respectively. Wheat bran had higher soluble CP (a) (33.3%), corn grain had higher insoluble potentially degradable CP (b) (54.5%) and soybean meal had higher degradation rate (9.78% h 1) than other feeds, inverses soybean meal (5.7%), alfalfa (43.9%) and alfalfa (3.75% h 1) had lower soluble CP, insoluble potentially degradable CP and degradation rate than other feeds, respectively. There were differences (p<0.05) among test feeds in dry matter and crude protein degradability after several incubation times. There was strong coefficient of correlation between extent of in situ dry matter and crude protein degradation and in vitro dry matter and crude protein disappearance. The key protein parameters in the proposed Metabolizable protein system, quick digestible protein, slowly digestible protein and digestible undegradable protein are derived from measurements of the rates of degradation of feed proteins suspended in a dacron bag in the rumen. The Metabolizable protein of soybean meal (381 g kg 1) was numerically rather than the other feeds and for corn grain (86 g kg 1) was numerically less than the other feeds.
 
 
 
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