background:neonatal calf diarrhea (ncd), also known ascalf scours, is caused by viruses, bacteria, and parasites.coronavirus is one of the important causes of ncd syndrome.electron microcopy has been used for demonstration of virusesin fecal samples of diarrheic calves since 1969. objectives:the aim of this study was to determine the prevalence ofcoronavirus in fecal samples of neonatal calf di...

in the present work, bi2s3 nanostructures have been synthesized with the aid of thioglycollic acid (tga) a solvent, capping agent, and sulfide source in the presence of ultrasonic method. the as-synthesized products were characterized by x-ray diffraction (xrd), energy dispersive x-ray spectroscopy (eds), scanning electron microscope (sem), and photoluminescence (pl) spectroscopy. the band gap ...

objective: carthamus tinctorius l.(c. tinctorius) is used as a food additive but also has medicinal applications. the present work was designed to investigate its probable side effects on the histology and function of the kidney in the mice. materials and methods: sixty adult balb/c mice were randomly distributed into one control and three experimental groups. the control group received only di...

introduction: to investigate the ultrastructural changes of dentin irradiated with 980-nm diode laser under different parameters and to observe the morphological alterations of odontoblasts and pulp tissue to determine the safety parameters of 980-nm diode laser in the treatment of dentin hypersensitivity (dh). methods: twenty extracted human third molars were selected to prepare dentin discs. ...

introduction: endodontic k-files are major tools for cleaning and shaping of the root canal systems. as there are various k-files available in iranian market, the physical properties of the five available brands were investigated to assist the clinician when selecting suitable endodontic k-files according to the intended application. materials and methods: physical properties (including debris ...

background: giardia lamblia is one of the most common protozoal infections in human especially children. metronidazol (mtz) is the drug of choice for treatment of giardiasis; its chemical composition possesses major threats and is becoming less sensitive. this study aimed to search for natural extracts alternative to mtz. methods: in-vivo effects of dichloromethane extracts of ginger and cinnam...

background: the aim of this study was to determine the correlation between ultrastructural studies for pinopodes expression after ovarian hyperstimulation and progesterone injection in mice. materials and methods: adult nmri mice were superovulated using human menopasual gonadotropic (hmg) and human chorionic gonadotropic (hcg) hormones; after that, daily injection of progesterone (1 mg/mouse) ...

highly self-ordered alumina nanopore arrays were fabricated using hard anodization technique in different mixtures of oxalic/phosphoric acid. the phosphoric acid concentration was varied from 0.05 to 0.3 m while the oxalic acid concentration was changed between 0.3 and 0.4 m. the self ordered nanoporous arrays were obtained in anodization voltage changing from 130 to 200 v. the interpore distan...

background copper (cu) is an essential trace element involved in normal reproduction but its overexposure may produce some detrimental effects. the aim of this study was to investigate the effects of copper sulfate poisoning on morphometery of mice ovarian structures and probable intracellular changes. methods thirty mature female mice were randomly allocated to control and two treatment groups...