Protective effect of Bixa orellana L. against radiation induced chromosomal aberration in Swiss albino mice

Radioprotective effect of hydroalcoholic extract of seeds of Bixa orellana have been studied by examining chromosome aberration in cells of bone marrow in irradiated mice. Healthy adult Swiss mice were injected intraperitoneally (ip) with 500 mg kg–1 body weight, 1000 mg kg–1 of or double distilled water (DDW). They were exposed to whole body irradiation of 2.0 Gy gamma radiation 30 min later. After 24 h, chromosomal aberrations were studied in the bone marrow of the femur by routine metaphase preparation after colchicine treatment. Radiation (4.0 Gy) increased the number of aberrant cells from less than 1% in controls to almost 20%. Pre-treatment with the extract compounds resulted in a significant reduction in the percentage of aberrant metaphases as well as in the different types of aberration scored. The extract was not toxic at 1500 mg kg–1 body weight. Being non toxic and easily available natural source Bixa orellana extract may be use for as radioprotective for human beings.Keywords: – radioprotective, Bixa orellan

Report of Acoustic Test on PSLV IS.1/2L Structure

The results of acoustic conducted on PSLV IS.1/2L at Acoustic Test Facility are briefly given. It contains test set up, Instrumentation details and tables of spectral response

The need for augmenting policies in fisheries sector

India is a country with immense fishing and culture potential. The unscientific practices carried out in this sector have led it to a chaotic condition from which it is high time to get rid off. Management of the sector in an efficient way will help its1evival from the prevailing situation. Policies are steps taken with a futuristic outlook. It's a relatively new term in the fishery sector. Policies taken in the past by European nations in the sector were well organized and adoption of such models may help to cut a new fishery policy for India. Fish and fisheries - both marine and inland - are an intrinsic part ofthe livelihoods of many in developing countrie

Convergence analysis with parameter estimates for a reduced basis acoustic scattering T-matrix method

The celebrated truncated T-matrix method for wave propagation models belongs to a class of the reduced basis methods (RBMs), with the parameters being incident waves and incident directions. The T-matrix characterizes the scattering properties of the obstacles independent of the incident and receiver directions. In the T-matrix method the reduced set of basis functions for representation of the scattered field is constructed analytically and hence, unlike other classes of the RBM, the T-matrix RBM avoids computationally intensive empirical construction of a reduced set of parameters and the associated basis set. However, establishing a convergence analysis and providing practical a priori estimates for reducing the number of basis functions in the T-matrix method has remained an open problem for several decades. In this work we solve this open problem for time-harmonic acoustic scattering in two and three dimensions. We numerically demonstrate the convergence analysis and the a priori parameter estimates for both point-source and plane-wave incident waves. Our approach can be used in conjunction with any numerical method for solving the forward wave propagation proble

Composites Used for Different Restorations Among the Postgraduate Dental Students and Practitioners - A Survey

Composite resins are a class of advanced and very well prevailing conventional restorative material. They can be used in both anterior and posterior restorations. Composites have their own indications and allusion in anterior and posterior teeth for restoration. The choices of aspired dental composite keeps changing along with the evolution of dental composites, for example, the development of smaller particle size, improved bonding system, curing refinements and sealing systems. This article solely focuses on identifying the most preferred composite material for anterior and posterior restorations. The aim of this study is to conduct a survey among many PG dental students and PG graduated dental practitioners from Chennai and then to analyse their choices and preferences in using different composite materials for anterior and posterior restorations in restorative dental therapy. A total number of 109 PG dental students and PG graduated dental practitioners took part in this survey. A questionnaire containing 15 questions was distributed through an online platform called Google Forms. The results were then collected and statistically analysed through SPSS software. Among the total participants who attended this survey, 55.96% were PG dental students and the remaining 44.04% were dental PG graduated dental practitioners from Chennai. Most of them preferred hybrid composite for anterior restoration. Majority of them seemed to think amalgam restorations to be easier for posterior restoration. A comparison between dentists with various qualifications on different light activation methods, preferences on composite materials for restoration, easily usable restorative materials and preferences of composite materials for posterior restoration was done (Chi-square analysis). It was found that there is no statistically significant difference (p-value >0.05) between the postgraduate students and dental practitioners on the composite preferences and its usage. From this survey it’s evident that PG dental students and PG graduated dental practitioners prefer hybrid composite for anterior restoration and find amalgam restoration to be preferred for posterior restorations

Two-fold anisotropic superconducting state in topological superconductor Sn4_4Au

Here we report the anisotropic magnetotransport properties in the superconducting state of Sn$_4$Au single crystal. Sn$_4$Au single crystal is synthesized through an easy melt growth method. Superconducting properties are evidenced by resistivity vs. temperature and DC magnetization measurements. Isothermal magnetization measurements hint toward type-II superconductivity in Sn$_4$Au. In-plane and out-of-plane resistivity measurements show anisotropic behavior of the upper critical field at temperatures below superconducting transition (T$_c$ = 2.3 K). The observed anisotropy is more elucidated in resistivity measurements performed below Tc at different tilt angles. The anisotropy parameter is found to be 1.26. The observed results show the presence two-fold anisotropic superconducting state in Sn$_4$Au single crystal, which may be induced due to the layered structure of synthesized Sn$_4$Au single crystal.Comment: 10 Pages Text + Figs: Revised Submitted: Euro. Phys. Let