In recent years, although many review articles have been presented about bioapplications of magnetic nanoparticles by some research groups with different expertise such as chemistry, biology, medicine, pharmacology, and materials science and engineering, the majority of these reviews are insufficiently comprehensive in all related topics like magnetic aspects of process. In the current review, it is attempted to carry out the inclusive surveys on importance of magnetic nanoparticles and especially magnetite ones and their required conditions for appropriate performance in bioapplications. The main attentions of this paper are focused on magnetic features which are less considered. Accordingly, the review contains essential magnetic properties and their measurement methods, synthesis techniques, surface modification processes, and applications of magnetic nanoparticles.

Magnetic-plasmonic heterodimer nanostructures synergistically present excellent magnetic and plasmonic characteristics in a unique platform as a multipurpose medium for recently invented biomedical applications, such as magnetic hyperthermia, photothermal therapy, drug delivery, bioimaging, and biosensing. In this review, we briefly outline the less-known aspects of heterodimers, including electronic composition, interfacial morphology, critical properties, and present concrete examples of recent progress in synthesis and applications. With a focus on emerging features and performance of heterodimers in biomedical applications, this review provides a comprehensive perspective of novel achievements and suggests a fruitful framework for future research.

Loss mechanisms in fluid heating of cobalt ferrite (CFO) nanoparticles and CFO-Pd heterodimer colloidal suspensions are investigated as a function of particle size, fluid concentration and magnetic field amplitude. The...

Background: Staphylococcus aureus is one of the commensal bacteria and components of nose normal flora in 30-40% of people. The cellular phone is infected through the hands of a person who has already been infected with nasal discharge, in the hospital. Patients and family members with a weakened immune system are at high risk of contamination; the treatment procedure is difficult. Materials and methods: 200 individuals who were working in the emergency departments of Ghaem were included in the study. Sampling was done by three sterile swabs; two swabs from the nose and one from the surface of the cellular phone. The diagnosis was done according to the staphylococcus biochemical tests. Beta-lactamase positive staphylococcus was identified by nitrocefin. MIC method was performed using E-test strips and agar dilution for detecting the MRSA. Results: 86 out of 200 nasal, and 200 cellular phone samples were diagnosed as beta-lactamase positive staphylococci and sensitivity test was done. 17 out of 86 beta-lactamase positive Staphylococcus aureus samples were resistant to cefoxitin, piperacillin, ceftriaxone, and cefotaxime; just one of these 17 samples was resistant to vancomycin. 24 samples were contaminated with healthcare-associated MRSA (HA-MRSA). Totally, cellular phone and nasal discharge of 12% of studied individuals were infected with the HA-MRSA. Conclusion: Cell phone usage should be prohibited in the hospital sections. Disinfection of the mobile phone should be taken when leaving the hospital, along with hand, face, and nose washing seriously. It is suggested to evaluate all persons working in hospitals regarding the contamination to MRSA.