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 ...

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...

the difficult to handle and store zinc borohydride, zn(bh4)2, is stabilized by supporting it on polyvinylpyridine. this new mild, efficient, selective, and regenerable polymer supported borohydride reducing agent reduces a variety organic compounds such as, aldehydes, a-b-unsaturated carbonyl compounds, acid chlorides, epoxides, disulfides, as well as reductive acetylation of carbonyl compounds...

mobile-ad-hoc-networks (manets) are self-configuring networks of mobile nodes, which communicate through wireless links. the infrastructure of a mobile ad hoc network (manet) has no routers for routing, and all nodes must share the same routing protocol to assist each other when transmitting messages. the main issues in manets include the mobility of the network nodes, the scarcity of computati...

conclusions combination therapy with surgical excision has a synergistic effect and appears to be the best treatment for extended lesions. however, new potent antibacterial drugs may help to improve the management of such infections when there are sufficient data on their in vitro activity. introduction nocardia species are described as opportunistic pathogens that mainly cause pulmonary nocard...

background chlorhexidine gluconate (chx) is the most common antimicrobial agent used against oral pathogens, however information on its ability to inhibit and disrupt anaerobic single and multispecies biofilms is relatively unknown. objectives the purpose of this study was to test the efficacy of chx for its biofilm inhibition and disruption properties using crystal violet assay. materials and ...