we introduce a new smooth, non-toxic, biocompatible method for cross-linking of gum tragacanth (gt), a polysaccharide of natural origin, in order to serve as a new supporting matrix for immobilization systems.  the modified gum is used as a matrix for the catalysis of the conversion of benzyl penicillin to 6-aminopenicillanic acid (6-apa) by means of escherichia coli atcc11105 with penicillin g...

ten female lambs of 7-month-old were divided into two equal groups and raised under a helminth-free conditions. animals in group 1 were immunized two times by whole gut homogenate (wgh) of haemonchus contortus emulsified in freund’s adjuvant. in group 2 (control), animals were injected by phosphate buffered saline emulsified in the same adjuvant. animals were challenged by 10000 third-stage lar...

background: mostly seen toxicities following vancomycin are ototoxicity and nephrotoxicity. we here report a very low birth weight preterm neonate who developed severe episodes of apnea after accidental iatrogenic vancomycin overdose, responsive to treatment with double volume exchange transfusion. case report: a preterm neonate weighing 1380 grams received two doses of 10-fold of the normal do...

background: ghrelin is a hormone related to food intake in rodents and humans, mainly produced in stomach. this study aimed to determine the effect of irradiation on ghrelin concentration in the gastric mucosa of rats. materials and methods : twenty-five rats were exposed to 15 gy of whole-abdominal irradiation. gastric tissue samples were obtained 1, 3, 7, 30, and 90 days after irradiation. fi...

background whooping cough is caused by bordetella pertussis, and it remains a public health concern. whole-cell pertussis vaccines have been commonly employed for expanded immunization. there is no doubt of the efficacy of whole cell pertussis vaccine, but it is necessary to improve the vaccine to decrease its toxicity. objectives in this study, an inactivation process of dealing with pertussis...

background: deficiency of attention and concentration is one of great reasons of traffic incidents and it covers between 20 to 50 percent of events due to careless and mindedness. studies show that attention and concentration are considered as one of important cognitive components in safe driving. vibration is an important physical effect in all vehicles. till now has not been any organized stu...