Green Reactants Act As Natural Precursor For Facile Synthesis Of Nanoparticles Using Withania Somnifera

Nanotechnology includes physical and chemical approaches intended for their phytofabrication of metal nanoparticles. Most of the time, these methods are not as safe as these are associated with the utilization of extremely noxious and hazardous substances that produce biological problems. Due to their manifold applications, various biological methods are gaining admiration for the fabrication of silver nanoparticles (AgNPs). The utilization of vegetative parts in the biosynthesis of nanoparticles (NPs) emerges as a commercial and ecological approach. The spectroscopic profile confirms the occurrence of a functional peak at 360 nm. Fourier transform infrared spectroscopy (FTIR) studies indicate that phenol groups are responsible for phytofabrication of NPs. The results of microbicidal screening confirm that broad spectrum of inhibition was found to be observed in 400 μL of biosynthesized AgNP against E. coli (23 mm) and B. cereus (22.3 mm) Therefore, the progress of simple photosynthesis methods avoid deleterious and harmful properties has fascinated major attention in this field.

Determinación de Presiones Intraorales en Compartimientos Biofuncionales de Pacientes Desdentados Totales / Determination of Intraoral Pressures on Biofunctional Compartments in Edentulous Patients

El objetivo fue describir las diferentes presiones intraorales que se presentan en los espacios interoclusal vestibular (EIO) y subpalatino (ESP) bajo distintas condiciones biofuncionales en pacientes adultos desdentados totales maxilares. Fueron seleccionados 15 pacientes en la Clínica Odontológica Docente Asistencial, Universidad de la Frontera (Temuco, Chile). La medición de presiones intraorales se realizó con un dispositivo digital GMH 3156, mediante los métodos de cánulas (control) y escudo oral. Se realizó una medición de calibración por 15 minutos y luego cuatro mediciones funcionales: B1 (condición abierta; 0­25 s); B2 (condición semiabierta; 35­85 s); B3 (condición cerrada; 95­145 s) y B4 (presión bajo deglución; 150­165 s). Con el escudo oral, la Fase B1 mostró en el EIO una presión constante entre 0­4 mBar y el ESP entre ­1 y ­3 mBar. En la Fase B2, el EIO llegó a 10 mBar y el ESP entre 0 y ­1 mBar. La Fase B3 mostró en el EIO oscilaciones entre 0 y 20 mBar, y en el ESP un aumento hasta 20 mBar. En la Fase B4, el EIO presentó un peak de 40 mBar, mientras que el ESP un peak desde 20 hasta ­140 mBar. La formación de dos compartimientos cerrados con presión intraoral negativa también ocurre en pacientes edéntulos, donde el ESP muestra cambios de presión negativa mayores al EIO. Patrones regulares de presión intraoral en espacios biofuncionales se observan en más del 50% de los casos.

The aim was to describe the different intraoral pressures that occur in the vestibular interocclusal space (IOS) and subpalatal space (SPS) under different oral functions in adult patients with maxillary edentulism. A descriptive and cross-sectional study was conducted. We selected 15 patients at the Dental Clinic of the Dentistry Faculty (CODA), Universidad de la Frontera (Temuco, Chile). Intraoral pressure measurement was performed using a digital manometer GMH 3156, by methods of cannulas (control) and oral shield. A calibration measurement was made for 15 minutes; then four functional measurements were performed: B1 (open-mouth condition, 0-25 s), B2 (semi-open compartment condition, 35-85 s), B3 (closed compartments condition; 95-145 s) and B4 (swallowing, 150-165 s). With the oral shield, the B1 phase in the IOS showed a constant pressure between 0-4 mBar and SPS between ­1 and ­3 mBar. In B2 phase, the IOS reached 10 mBar and SPS between 0 and ­1 mBar . Phase B3 OIS oscillations showed between 0 and 20 mBar, and the SPS increased to 20 mbar. In B4 phase, the IOS showed a peak of 40 mbar, while the SPS showed a peak from 20 to ­140 mbar. The formation of two closed compartments with negative intra-oral pressure also occurs in edentulous patients, where the SPS shows greater negative pressure changes than IOS. Regular patterns of intra-oral pressure in biofunctional compartments were observed in over 50% of cases.