Background: Recent studies have shown that nanoemulsions prepared with essential oils have significant antimicrobial potential against multidrug-resistant pathogens due to increased chemical stability. Nanoemulsion also promotes controlled and sustained release, which increases their bioavailability and efficacy against multidrug-resistant bacteria. Objective: This study aimed to investigate the antimicrobial, antifungal, antioxidant, and cytotoxicity properties of cinnamon essential oil and peppermint essential oil as nanoemulsions compared to pure forms. For this purpose, analyses of the selected stable nanoemulsions were carried out. Method: The droplet sizes and zeta potentials of peppermint essential oil nanoemulsions and cinnamon essential oil nanoemulsions were found to be 154.6±1.42 nm and -17.1±0.68 mV and 200.3±4.71 nm and -20.0±0.81 mV, respectively. Although the amount of essential oil used in nanoemulsions was 25% w/w, antioxidant and antimicrobial activities were found to be more effective compared to pure essential oils. Results: In cytotoxicity studies on the 3T3 cell line, both essential oil nanoemulsions showed higher cell viability than pure essential oils. At the same time, cinnamon essential oil nanoemulsions exhibited a higher antioxidant property than peppermint essential oil nanoemulsions and showed superiority in the antimicrobial susceptibility test conducted against four bacteria and two fungi. Cell viability tests determined that cinnamon essential oil nanoemulsions showed considerably higher cell viability compared to pure cinnamon essential oil. Conclusion: These findings indicated that the prepared nanoemulsions in the current study might positively influence the dosing regimen and clinical outcomes of antibiotic therapy.

The Ocean is a continuous body of saltwater that covers more than 70 percent of the Earth's surface. Despite the fact that oceanic habitats exhibit chemical and physical properties that make certain ocean zones suitable or unsuitable places for different species to live, the chemical (salinity and dissolved gases) and physical (temperature, density, buoyancy, waves, tides, and currents) properties of ocean water are delicately intermingled which produce one of the most self-sustaining life support systems on earth. This unique characteristic has made the marine environment an untapped source of bioactive natural products with unique structural and chemical features. Although many marine-derived compounds have been explored for their potential in pharmaceutical industry and some of which are already on the market, these molecules are still underexplored for natural cosmetics when compared to plant-derived compounds. However, recently many cosmetic firms have turned their attention to the sea to obtain several kinds of marine-derived compounds for cosmetic ingredients such as moisturizer, anti-ageing, photoprotection and skin whitening agents. With more research on the small molecules, biopolymers and enzymes from the marine environment, it is expected that the era of “blue cosmetics” will be dominating this sector very soon.

Traditional wound and burn treatments often fall short in balancing antimicrobial efficacy, patient comfort, and ease of application. This study introduces a novel, transparent, thermoresponsive sol–gel formulation incorporating polyhexamethylene biguanide (PHMB) for advanced topical therapy. Utilizing Poloxamer 407 as a biocompatible carrier, the formulation remains a sprayable liquid at room temperature and instantly gels upon contact with body temperature, enabling painless, pressure-free application on sensitive, injured skin. Comprehensive in vitro and in vivo evaluations confirmed the formulation’s broad-spectrum antimicrobial efficacy (≥5 log₁₀ reduction in 30 s), high biocompatibility (viability > 70% in fibroblasts), non-irritancy (OECD 425-compliant), and physical stability across three months. Importantly, the formulation maintained fibroblast migration capacity—crucial for wound regeneration—while exhibiting rapid sol-to-gel transition at ~34 °C. These findings highlight the system’s potential as a next-generation wound dressing with enhanced user compliance, transparent monitoring capability, and rapid healing support, particularly in disaster or emergency scenarios.

We developed original thermoreversible (sol-gel) formulations of salmon calcitonin (sCT) for nasal applications. The sol-gel has been compared with commercial intranasal sprays in vitro and in vivo studies. The aim of studying sol-gel form is to arrange the viscosity of formulations for a reversible adequate fluidity at different temperatures. This situation may facilitate the use of drugs as sprays and increase the bioadhesive ability to mucosa. Characterization of optimum formulations was studied. Validated analytical assays determined the number of sCT. An approximately equal number of commercial and sol-gel dosages were sprayed into the nostrils of the rabbits. Blood samples were collected from the ear veins of rabbits and determined by enzyme immunoassay plates. These plates were evaluated by Thermo Labsystem Multiscan Spectrum at 450 nm. Thanks to Winnonlin 5.2, pharmacokinetic data were evaluated by a non-compartmental method. The absolute bioavailability of the formulation at pH 4 and the commercial product (CP) was compared by evaluating the primary pharmacokinetic data area under the curve 0→t_last. The absolute bioavailability of the commercial intranasal spray was measured 1.88 based on maximum concentration (C_max) assessment. C_max of the sol-gel formulation pH 4 was calculated as 0.99 and the relative bioavailability was obtained 53.3%. In vivo pharmacokinetic data of sol-gel formulation with pH 3 showed significantly higher volume of distribution parameter than the CP (111167>35408). It is thought that the formulation adhered to the nasal mucosa releases sCT slowly and less.

The COVID-19 pandemic has severely impacted the world economy, businesses and global health. Exceptional situations are evident in the food, cosmetics and pharmaceutical production in the supply chain, where many businesses have been shut down completely following government restrictions. In the pandemic process, it has become much more important to ensure hygienic products and employee safety and to deliver quality and healthy products to the consumer. In extraordinary conditions, it is necessary to provide additional contributions to the principles of good manufacturing practices. With the additional measures to be taken during the epidemic period, a healthy and safe operation can be brought to production. In addition, the assurance system can continue to function despite restrictions and failing audits. In addition to the updated guides, the development of roadmaps specific to the epidemic period for production may provide the advantage of being ready for problems.