Identification of Beryllium Hydride Isotopomer Lines in Sunspot Umbral Spectra

A high resolution spectrum of FTS sunspot umbra of NSO/Kitt Peak was used to conduct a search for the molecular absorption lines due to BeH, BeD and BeT isotopomers. Analysis led to estimates of identification of the molecular lines of bands A - X (0,0), (1,1) and (2,2) for BeH, A - X (0,0), (1,1), (2,2) and (3,3) for BeD and of A - X (0,0), (1,1) and (2,2) for BeT. Among the identified lines, those which are well resolved were selected for measurements to calculate equivalent widths. The values of effective rotational temperature T were estimated for bands A - X(1,1) and (2,2) of BeH, A - X(1,1) of BeD and A - X(2,2) of BeT to be 4228K, 4057K, 3941K and 3243K respectively

The existence of inflection points for generalized log-aesthetic curves satisfying G1 data

Log-Aesthetic (LA) curves have been implemented in a CAD/CAM system for various design feats.LA curves possess linear Logarithmic Curvature Graph (LCG) with gradient (shape parameter) denoted as α.In 2009, a generalized form of LA curves called Generalized Log-Aesthetic Curves (GLAC) has been proposed which has an extra shape parameter as ν compared to LA curves.Recently, G1 continuous GLAC algorithm has been proposed which utilizes the extra shape parameter using four control points.This paper discusses on the existence of inflection points in a GLAC segment satisfying G1 Hermite data and the effect of inflection point on convex hull property.It is found that the existence of inflection point can be avoided by manipulating the value of α.Numerical experiments show that the increase of α may remove the inflection point (if any) in a GLAC segment

On the Effective Temperature of Sunspot Umbrae using Beryllium Hydride Isotopomer Lines

A search for fourteen bands of the visibleand infrared systems of the beryllium hydride isotopomers, in addition to the previously identified bands A - X(0, 0; 1, 1; 2, 2) for BeH, A - X(0, 0; 1, 1; 2, 2) for BeD and A - X(0, 0; 1, 1; 2, 2) for BeT molecules was conducted. The equivalent widths were measured for the well isolated identified lines of the strongest band and the effective temperatures were estimated for the systems for which the presence of hints is confirmed

Formulation of Biologically-Inspired Silk-Based Drug Carriers for Pulmonary Delivery Targeted for Lung Cancer

The benefits of using silk fibroin, a major protein in silk, are widely established in many biomedical applications including tissue regeneration, bioactive coating and in vitro tissue models. The properties of silk such as biocompatibility and controlled degradation are utilized in this study to formulate for the first time as carriers for pulmonary drug delivery. Silk fibroin particles are spray dried or spray-freeze-dried to enable the delivery to the airways via dry powder inhalers. The addition of excipients such as mannitol is optimized for both the stabilization of protein during the spray-freezing process as well as for efficient dispersion using an in vitro aerosolisation impactor. Cisplatin is incorporated into the silk-based formulations with or without cross-linking, which show different release profiles. The particles show high aerosolisation performance through the measurement of in vitro lung deposition, which is at the level of commercially available dry powder inhalers. The silk-based particles are shown to be cytocompatible with A549 human lung epithelial cell line. The cytotoxicity of cisplatin is demonstrated to be enhanced when delivered using the cross-linked silk-based particles. These novel inhalable silk-based drug carriers have the potential to be used as anti-cancer drug delivery systems targeted for the lungs

Astrophysically useful parameters for certain band systems of BeH, BeD and BeT molecules

The vibronic (vibration-electronic) transition probability parameters such as Franck-Condon (FC) factors and r-centroids of diatomic molecular species could be useful in the identification of molecular bands and in the estimation of relative abundance of the emitted species in astrophysical sources. In this study, they have been evaluated for the electronic transitions A2Πr-X2Σ+, B2Πr-X2Σ+ and C2Σ+ - X2Σ+ systems of BeH, A2Πr - X2Σ and C2Σ+ - X2Σ+ system of BeD and A2Πr - X2Σ+ system of BeT molecules using a suitable potential

Spectroscopic Analysis of Gas Phase Astrophysical Molecule: Beryllium Monofluride

International audienceThe beryllium monofluride (BeF) is astrophysically significant molecule.The radiative transition parameters such as Franck-Condon (FC) factor, r-centroids, electronic transition moment, Einstein coefficient, band oscillator strength, radiative life time and effective vibrational temperature have been computed for 2 2 r A X     system of BeF molecule by the more reliable numerical integration procedure for the experimentally known vibrational levels using Rydberg-Klein-Rees (RKR) potential energy curves. The effective vibrational temperature of this system of BeF molecule was found to be nearly 5630 K. Hence, the radiative transition parameters as well as effective vibrational temperature help us to ascertain the presence of BeF molecule in the interstellar medium, S-stars and sunspots. Introduction. Fluoride based beryllium are significant molecules in the field of astrophysics, astrochemistry and space science. The intensity distribution of the molecular band system of electronic states is controlled by the Franck-Condon (FC) factor. Franck-Condon (FC) factor are essential parameter for every molecular band system, this factor are used to calculation of the relative band intensities. The knowledge of r-centroids is useful in the discussion of the variation of the electronic transition moment with the internuclear separation and the band strengths. The evaluation of accurate FC factor and r-centroids of diatomic molecule is necessary for understanding the physical-chemical condition of the astrophysical and allied emitting source. Accurate values of FC facto

On the effective temperature of sunspot umbrae using beryllium hydride isotopomer lines

A search for fourteen bands of the visible and infrared systems of the beryllium hydride isotopomers, in addition to the previously identified bands A - X(0, 0; 1, 1; 2, 2) for BeH, A - X(0, 0; 1, 1; 2, 2) for BeD and A - X(0, 0; 1, 1; 2, 2) for BeT molecules was conducted. The equivalent widths were measured for the well isolated identified lines of the strongest band and the effective temperatures were estimated for the systems for which the presence of hints is confirmed