achillea tenuifolia lam. (asteraceae) afforded a dichloromethane fraction from which three known compounds β-sitosterol (compound1), 5-hydroxy, 4',6,7– trimethoxy flavone (salvigenin compound 2), and methyl-gallate (compound 3) were isolated for the first time. the structure of isolated compounds was elucidated by different spectroscopic methods. applying the molar-ratio method, the comple...

background: some types of implants used for orbital implantation have side effects and complications. in this study we have evaluated beta-tricalcium phosphate (ß-tcp: chronos) granules as an orbital implant.   methods: eighteen rabbits randomly allocated to four groups. right eye enucleation performed in groups i to iii followed by filling with autologous bone particles (n=5), a mixture of aut...

we have prepared and characterized a few mn (iii) complexes by using a few bidentate and tridentate ligands. spectra of the manganese (abstract we have prepared and characterized a few mn (iii) complexes by using a few bidentate and tridentate ligands. spectra of the manganese (iii) ion in a variety of molecular environments are reported . on the basis of solution spectra, some of these complex...

Background and Aims: The indiscriminate use of antibiotics can lead to antibiotic resistance in the treatment of infections caused by bacteria such as Pseudomonas aeruginosa. The presence of integrons in Pseudomonas is clearly associated with multidrug resistances. Therefore, this study aimed at tracking class I, II and III integrons of antibiotic-resistant isolates of Pseudomonas aeruginosa th...

background and aims. traditional methods of diagnosing periodontal diseases have their limitations, which include inability to provide information about the recent activity of the disease and difficulty in diagnosing the disease at an early stage when clinical changes have not started. this has necessitated the use of biomarkers designed to overcome these short-comings. materials and methods. a...

Background: Mammalian sperm are not ready to fertilize oocyte immediately after ejaculation. Sperm achieve this ability after undergoing the processes of capacitation and hyperactivation. Hyperactivation refers to a change in the motility pattern of the sperm. Pharmacological reagents and physical-mechanical forces have been used in sperm from a variety of species. Hydrostatic pressure is a cru...

background and aims. a plethora of definitions has been used for periodontitis for epidemiological studies. the aim of this cross-sectional study was to assess the impact of different case definitions on the prevalence of periodontitis and to find the level of agreement among them. materials and methods. periodontal records of 300 subjects were randomly selected from the database of oral health ...