Assessment of Nasal Obstruction in Patients Undergoing Functional Endoscopic Sinus Surgery.

Aim & objectives-To assess and compare the nasal obstruction in patients before and after undergoing FESS using Visual analogue scale, Rhinomanometry and Diagnostic nasal endoscopy. Introduction- Chronic Rhinosinusitis with, or without nasal polyps can lead to nasal obstruction. Patients refractory to medical treatment undergo Functional endoscopic sinus surgery (FESS). FESS has been shown to improve subjective quality of life outcomes and objective endoscopic improvement. Material & methods- A prospective study conducted in the department of Ear, Nose & Throat, of a tertiary care medical college and associated Hospital between January 2021 and October 2022. Subjective and objective assessment of nasal obstruction was done using Visual analogue scale, Rhinomanometry and Diagnostic nasal endoscopy before and after surgery at 1st, 3rd and 6th month. Results- Post FESS, there was a significant improvement in nasal obstruction on Visual analogue scale, sinuses were healthy and drainage was adequate on Diagnostic nasal endoscopy, statistically significant (P < 0.05) decrease in nasal resistance was seen on Rhinomanometry. Conclusion- A good subjective outcome on Visual analogue scale and a good objective outcome on Diagnostic nasal endoscopy and Rhinomanometry can be obtained with FESS in patients with Chronic Rhinosinusitis.

Monodispersed ZnO nanoparticles and their use in heterojunction solar cell.

Monodispersed ZnO nanoparticles have been synthesised in ethylene glycol medium using zinc acetate and sodium hydroxide at room temperature through ultrasonic treatment. The monodispersed ZnO nanoparticles were characterized by XRD, TEM, SEM, and optical spectroscopy. The results indicate that ZnO shows the hexagonal wurtzite structure having 8 nm average particle size with the band gap of 3.93 eV. ZnO nanoparticles blended with P3HT show the improvement in the interchains and intrachains ordering as compared to pure P3HT. The power conversion efficiency of P3HT/ZnO solar cell is found to be 0.88%, which is comparable with the result obtained by other researchers.

A kinetic analysis on non-isothermal glass-crystal transformation in Ge(1-x)Sn(x)Se(2.5) (0 ≤ x ≤ 0.5) glasses.

Differential scanning calorimetry (DSC) has been employed at five different heating rates to investigate the glass-crystal transformation in Ge(1-x)Sn(x)Se(2.5) (0≤x≤0.5) glasses under non-isothermal conditions. From the dependence of glass transition temperature on the heating rate 'α' , the activation energy of glass transition, E(t), has been calculated on the basis of the Kissinger model. Results indicate that T(g) and E(t) attain their minimum values at 0.3 at. wt% of Sn. The crystallization process has been investigated using Kissinger, Matusita, Augis and Bennett, and Gao and Wang models. Various kinetic parameters such as activation energy of crystallization, E(c), Avrami exponent (n), dimensionality of growth (m), frequency factor (K(o)) and crystallization rate factor (K) have been calculated for a better understanding of the growth mechanism. The obtained kinetic parameters indicate that stability of glassy samples decreases upto 0.3 at. wt% of Sn and increases on further addition of Sn.