Purpose: To determine the prevalence of refractive errors, strabismus and amblyopia in the schoolboys of Varamin city, Iran Methods: In a cross-sectional population-based study in 2010, we used random cluster sampling to select the participants from Varamin high school students. Examinations were conducted at the school site under standard conditions. All students had non-cycloplegic refraction...

A novel and selective method for the fast determination of trace amounts of Zn(II)ions in water samples has been developed. The first organic-solution-processable functionalized-graphene (SPFGraphene) hybrid material with porphyrins. porphyrin–graphene nanohybrid, 5-4 (aminophenyl)-10, 15, 20-triphenyl porphyrin and its photophysical properties including optical (TPP) and grapheme oxide molecul...

The aims of this study were to determine the prevalence and antibiotic resistance of Staphylococcus aureus isolated from bovine clinical mastitis in Varamin, Tehran Province, Iran. All of the isolated Staph. aureus were identified by morphology and culture and confirmed using the API Staph identification system (bioMérieux, Marcy-l'Étoile, France). Antibiotic resistance genes were detected by P...

The oligosaccharide structures of total glycoproteins in suspension-cultured Arabidopsis thaliana MM2d cells are determined. The N-linked sugar chains released by hydrazinolysis were labeled with 2-aminopyridine, and analyzed by a combination of HPLC, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, and exoglucosidase digestion. The glycan structures determined were...

WE STAND AT THE THRESHOLD OF A NEW CENTURY with the whole human genome stretched out before us. It is, at once, a public and intensely private record. Written in each person’s DNA is a shared history of the evolution of our species and a personal portent of both the health and disabilities we may encounter as individuals. High-throughput analyses using bioinformatic tools and DNA arrays are unc...

A total of 275 dromedary camels (16 males and 259 females) of local "Arabiyat" breed suffering from different types and degrees of severity of toenail tumors were surgically treated. Histopathological examination of the tissue samples removed from 50 tumor-like growths (2 males and 48 females) revealed three types of tumors; squamous cell carcinoma (70%), spiny keratoderma (22%) and fibroma (8%...

Flavodoxin (Fld) has been demonstrated to bind to ferredoxin- NADP(+) reductase A (FprA) in Pseudomonas putida. Two residues (Phe(256), Lys(259)) of FprA are likely to be important for interacting with Fld based on homology modeling. Sitedirected mutagenesis and pH-dependent enzyme kinetics were performed to further examine the role of these residues. The catalytic efficiencies of FprA-Ala(259)...

Caenorhabditis elegans is an important non-mammalian alternative assay model for toxicological study. Previous study has indicated that exposure to multi-walled carbon nanotubes (MWCNTs) dysregulated the transcriptional expression of mir-259. In this study, we examined the molecular basis for mir-259 in regulating MWCNTs toxicity in nematodes. Mutation of mir-259 induced a susceptible property ...