This experiment was conducted to evaluate the effects of different levels of costmary(Tanacetum balsamita)medicinal plant on performance, egg traits, and blood biochemical parameters of laying hens. Hundred-eighty of Hi-line laying hens (W 36) from 46 until 58 weeks of age were used in a completely randomized design in five treatments and three replicates (12 birds per replicate). The treatment...

OBJECTIVES To determine the proportion of pediatric patients with cystic fibrosis who do not produce expectorated sputum during routine ambulatory clinic visits and to identify clinical predictors of these patients. DESIGN Cross-sectional study. SETTING The cystic fibrosis clinic at The Hospital for Sick Children, Toronto, Ontario. PARTICIPANTS One hundred eighty-three patients aged 6 to ...

Hepatitis B virus (HBV), the prototype member of the family hepadnaviridae, is a human pathogen, causing the serious liver disease. The virus is the major cause of chronic hepatitis cirrhosis, and hepatocellular carcinoma worldwide. HBV has been classified into eight genotypes, which vary in geographic distribution. The aim of this study was to recognize the HBV genotypes in hepatitis B surface...

Introduction The aim of this study was to evaluate the incidence of dentinal defects and vertical root fractures (VRFs) after endodontic retreatment and mechanical cycling (MC). Methods and Materials Two hundred mandibular premolars were selected. Forty teeth were left unprepared (control group). The remaining 160 root canals were prepared with ProTaper instruments and filled by using two dif...