http://revistainvestigacion.info/index.php/ps <p><em>Perspectives on Science</em> publishes science studies that integrate historical, philosophical, and sociological perspectives. Its interdisciplinary approach is intended to foster a more comprehensive understanding of the sciences and the contexts in which they develop. Each issue is comprised of theoretical essays, case studies and review essays.</p> en-US Perspectives on Science http://revistainvestigacion.info/index.php/ps/article/view/111 <p>The tobacco was separated from the cigarette filter and wrapper. The tobacco samples were put in oven and dried to constant weight at 105 ◦C. The sample was mixed to achieve homogeneity by using a mortar and pestle. 2.0 g of dried tobacco was put in a beaker, 0.1 mL of 209Po tracer (0.105 Bq) (Standard Reference Material 4326, National Institute of Standard and Technology, USA) was added to the dried material. The dried samples were put on a hot plate (90—95 ◦C) with 10 mL HNO3 (60% weight/weight) and 10 mL HCl (35% weight/weight). Occasionally, a few drop of H2O2 (30% weight/weight) and octanol (98% weight/weight) was added to the sample. When approaching near dryness, 20 mL HCl (35% weight/weight) was added.<br>Introduction</p> Desideri, D., Meli Copyright (c) 2023 2023-01-15 2023-01-15 2 01 http://revistainvestigacion.info/index.php/ps/article/view/112 <p>For qualitative identification as well as quantitative determination of the specific activity of gamma-emitting radionuclides present in tobacco samples, a high-resolution gamma-ray spectrometer equipped with a planar BEGe (Broad Energy Germanium) detector (Canberra, model BE 3825) was used. The system has a relative efficiency of 20% and an energy resolution (FWHM) of 0.38 keV at 5.9 keV, 0.628 keV at 122 keV and 1.724 keV at 1332.5 keV. The detec- tor was connected to a Digital Signal Analyser (DSA-LX) Unit (16K channel signal analyser, V1.0) from Canberra. It is shielded with 15 cm of lead (including 2 cm made of archae- ological lead) to reduce the contribution of environmental radioactivity to its background. The lead shielding was sur- rounded with an inner layer of copper (0.2 cm thick) toreduce the contribution from Pb X-rays.</p> ABDEEN.Meli Copyright (c) 2023 2023-01-15 2023-01-15 2 01 http://revistainvestigacion.info/index.php/ps/article/view/115 <p>The anti-corrosive property of Capsicum annuum fruit paste (CFP) on mild steel was investigated. Weight loss and SEM analysis showed that the aqueous and ethanolic solutions of CFP exhibits excellent corrosion inhibition in 2 M HCl. Contact angle, surface atomic composition and FTIR studies verified the presence of an organic film on the mild steel surface. The FTIR spectra also indicated the formation of active compound-Fe complex. CFP thus shows potential as an inexpensive environment friendly corrosion inhibitor for mild steel</p> K. CHAIN Copyright (c) 2023 2023-01-15 2023-01-15 2 01