Effects of combination of ethylenediaminetetraacetic acid and microbial phytase on the serum concentration and digestibility of some minerals in broiler chicks

This experiment was conducted to evaluate the combined effects of ethylene diamine tetraacetic acid (EDTA) and microbial phytase (MP) on the serum concentration and digestibility of some minerals in broiler chicks. This experiment was conducted using 360 Ross-308 male broiler chicks in a completely randomized design with a 3×2 factorial arrangement (0, 0.1 and 0.2% EDTA and 0 and 500 FTU MP). Fourreplicates of 15 chicks per each were fed dietary treatments which included; P-deficient basal diet [0.2% available phosphorus (aP)] (NC), NC + 500 FTU MP per kilogram of diet, NC + 0.1% EDTA per kilogram ofdiet, NC + 0.1% EDTA + 500 FTU MP per kilogram of diet, NC + 0.2% EDTA per kilogram and NC + 0.2% EDTA + 500 FTU MP per kilogram of diet. The concentration of zinc, copper and manganese of serum and their digestibility and also digestibility of apparent metabolizable energy (AMEn) was evaluated. The results showed that phytase supplementation of P-deficient diets significantly increased zinc concentration of serum (P < 0.05). Interaction effect of EDTA+MP on serum concentration of copper and manganese and also digestibility of zinc was significant (P < 0.05). EDTA supplementation of P-deficient diets significantly increased manganese digestibility in broiler chicks (P < 0.01). Keywords: Ethylene diamine tetraacetic acid, microbial phytase, zinc, copper, manganes

Estimation of genetic parameters in three commercial silk-worm lines of Iran

In order to estimate genetic parameters of the cocoon weight (CW), cocoon shell weight (CSW) and cocoon shell percentage (CSP) of three industrial lines of silk-worm (number 31, 103 and 107), data were collected from three successive generations. (Co)variance components were as follows: additive genetic variation (δ2g) and environmental variation (δ2e) of traits and additive genetic covariance (covg1, 2) and environmental covariance (cove1, 2). Heritability of traits was estimated with maximum likelihood procedure (REML) by using algorithms (DFREML) based on a three trait animal model. Data were from half-sibs and the heritability and genetic, phenotypic and environmental correlation were estimated between traits. The highest heritability for CW was estimated in lines 31 and 107 (0.58 and 0.58, respectively) and the lowest heritability for CW was in line number 103 (0.28). The highest and lowest heritability for CSW was in lines 107 and 103 (0.70 and 0.01, respectively). Also, the highest heritability for CWP was in line 31 (0.48) and the lowest value was in line 103 (0.077). The highest δ2g for CSP was estimated in line 103 (0.004) and lowest δ2g was estimated in line 107 (0.001). The highest and lowest δ2g for CW were estimated in lines 103 and 31 (0.0004 and 0.00003, respectively). The δ2g for CW was high inline 31 (0.604) but low in line 103 (0.257). The highest and lowest δ2e for CW were in lines 103 and 107 (0.02 and 0.01, respectively). Furthermore, the highest δ2e for CSW was estimated in line 103 (0.0013) butminimum δ2e was in line 107 (0.0007). Maximum covg1, 2 for CW-CSW was estimated in line 103 (0.00087) and minimum value was estimated in line 31 (0.00012). A high cove1,2 for CW- CSP was estimated in line 103 (0.093) but it was low in line 31 (0.00026). The highest covg1, 2 for CSW-CSP was in line 103 (0.002) but it was low in line 31 (0.00079).Key words: Cocoon, correlation, heritability, genetic (Co) variance

Sinonasal Chondrosarcoma Presenting With Isolated Severe Vision Loss

A 24-year-old man presented with a 2-month history of progressive, painless vision loss in the right eye, with no history of headache, nasal congestion, rhinorrhea, or epistaxis