Comparative study of optimal compression pressure between conventional Barton's dressing and prefabricate garment in parotidectomy patients.

Excessive compression after parotidectomy can lead to flap necrosis, while inadequate pressure can cause fluid accumulation. This study aimed to determine the optimal pressure and compression properties of different types of dressings. Initially, pressure measurements were taken for conventional Barton's dressing and a pre-fabricated facial garment. In the subsequent phase, patients were randomly assigned to receive one of three types of pressure dressings: conforming bandage Barton's dressing, elastic bandage Barton's dressing or pre-fabricated facial garment. The dressing types were randomly crossed over the following day. The mean pressure exerted by conventional Barton's dressing and the pre-fabricated facial garment was 15.86 and 14.81 mmHg, respectively. There was no significant difference in the proportion of optimal pressure among the three types of pressure dressing (p-values of 0.195, 0.555 and 0.089 at pre-auricular, angle of mandible and post-auricular sites, respectively). The pre-auricular area demonstrated the highest proportion of optimal pressure, while suboptimal pressure was noted at the angle of the mandible and post-auricular area. Dressing types had no effect on pressure stability (p = 0.37), and there was no significant difference in patient preference (p = 0.91). Conforming bandage Barton's dressing, elastic bandage Barton's dressing and pre-fabricated facial garment exhibit comparable compressive properties, with no significant difference in patient preference and pressure stability.

Investigating UV-Irradiation Parameters in the Green Synthesis of Silver Nanoparticles from Water Hyacinth Leaf Extract: Optimization for Future Sensor Applications.

Silver nanoparticles (AgNPs) can be produced safely and greenly using water hyacinth, an invasive aquatic plant, as a reducing agent. This study aimed to optimize the UV-irradiation parameters for the synthesis of AgNPs from water hyacinth leaf extract. The study varied the reaction time and pH levels and added a stabilizing agent to the mixture. The synthesized AgNPs were characterized using UV-visible spectroscopy (UV-vis), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and inductively coupled plasma optical emission spectroscopy (ICP-OES). The findings revealed that the optimal conditions for synthesizing AgNPs were achieved by adjusting the pH level to 8.5, adding starch as a stabilizing agent, and exposing the mixture to UV-A radiation for one hour. These conditions resulted in the smallest size and highest quantity of AgNPs. Furthermore, the synthesized AgNP colloids remained stable for up to six months. This study highlights the potential of utilizing water hyacinth as a sustainable and cost-effective reducing agent for AgNP synthesis, with potential applications in pharmaceuticals, drug development, catalysis, and sensing detection.

Rapid screening for anthocyanins in cane sugars using ESR spectroscopy.

Anthocyanin, which is soluble in water and released into sugar steam during extraction, was investigated in this study. The anthocyanin content in refined sugar, plantation white sugar, soft brown sugar and raw sugar was determined using electron spin resonance (ESR) spectroscopy, which was operated at room temperature, and compared with spectra from standard anthocyanin. The ESR spectra of red and violet anthocyanins was predominantly g ≈ 2.0055, which corresponded to an unpaired electron located in the pyrylium ring. Signals for Fe(III) and Mn(II), which naturally occur in plants, were found in raw sugar, soft brown sugar and standard anthocyanin but were absent from refined sugar and plantation white sugar due to the refining process. In addition, the ESR results were correlated with the apparent colour of the sugar, which was determined using the method of the International Commission for Uniform Methods of Sugar Analysis and inductively coupled plasma optical emission spectroscopy.