two new potential magnetic resonance imaging contrast agents, gd-hematoporphyrin (gd-h) and gd-tetra-carboranylmethoxyphenyl-porphyrin (gd tcp), were synthesized and applied to nude mice with human melanoma (mm 138) xenografts. these agents showed a high relaxivity because of their greater potential to coordinate water molecules. the reduction of t1 relaxation times of 16 and 21% was observed i...

background: about 90% of the world�s contraceptive users are women. this gender-based usage has occurred due to the emphasis of family planning programs and contraception research. condom, vasectomy and withdrawal are the only male contraception devices available with less assurance for men. for new male contraceptive to have an impact, they must be acceptable to both men and women, as well as ...

BACKGROUND The 'external validity' of randomized controlled trials is an important measure of quality, but is often not formally assessed. Trials concerning mass drug administration for helminth control are likely to guide public health policy and careful interpretation of their context is needed. We aimed to determine how representative participants in one such trial were of their community. W...

bacteriophage is a kind of virus that infect bacteria, and is distinct from the animal and plant viruses that could have either lytic or lysogenic cycle. lytic phages known as candidates for phage therapy, since they rapidly replicate into their host and lyse them. theoretically, phages have more than a few benefits over routine antibiotics. they are extremely specific and for their targeted ho...

introduction: the aim of this study was to evaluate the antimicrobial effect of eucalyptus galbie and myrtus communis l. methanolic extracts, chlorhexidine (chx) and sodium hypochlorite (naocl) on enterococcus faecalis (e. faecalis) as the predominant species isolated from infected root canals. methods and materials: one hundred twenty mandibular premolars were randomly divided into 8 groups: e...

the aim of this study was to assess the effect of 30% hydrogen peroxide on the microleakage of class v cavities restored with either a silorane-based composite or two methacrylate-based composites.a total of 96 standard class v cavities (1.5 × 2 × 3 mm) were prepared on the buccal surface of sound extracted human premolars with both enamel and dentin margins and randomly assigned into three gro...