Reaction of Perrhenate with Phthalocyanine Derivatives in the Presence of Reducing Agents and Rhenium Oxide Nanoparticles in Biomedical Applications.

A novel alternative route to access rhenium(V)-phthalocyanine complexes through direct metalation of metal-free phthalocyanines (H2 Pcs) with a rhenium(VII) salt in the presence of various two-electron reducing agents is presented. Direct ion metalation of tetraamino- or tetranitrophthalocyanine with perrhenate (ReO4- ) in the presence of triphenylphosphine led to oxidative decomposition of the H2 Pcs, giving their respective phthalonitriles. Conversely, treatment of H2 Pcs with ReO4- employing sodium metabisulfite yielded the desired ReV O-Pc complex. Finally, reaction of H2 Pcs with ReO4- and NaBH4 as reducing agent led to the formation of rhenium oxide (Rex Oy ) nanoparticles (NPs). The NP synthesis was optimised, and the Rex Oy NPs were capped with folic acid (FA) conjugated with tetraaminophthalocyanine (TAPc) to enhance their cancer cell targeting ability. The cytotoxicity profile of the resultant Rex Oy -TAPc-FA NPs was assessed and found to be greater than 80 % viability in four cell lines, namely, MDA-MB-231, HCC7, HCC1806 and HEK293T. Non-cytotoxic concentrations were determined and employed in cancer cell localization studies. The particle size effect on localization of NPs was also investigated using confocal fluorescence and transmission electron microscopy. The smaller NPs (≈10 nm) were found to exhibit stronger fluorescence properties than the ≈50 nm NPs and exhibited better cell localization ability than the ≈50 nm NPs.

Assessment of current occupational safety and health regulations and legislation in the Caribbean.

Neglecting occupational safety and health (OSH) can have adverse and even deadly consequences. While OSH is important in any nation, the issue is particularly concerning in developing countries, including ones in the Caribbean. The purpose of this study, which was carried out in 2012 and 2013, was to examine the reasons for an apparent fundamental lack of awareness of OSH in the Caribbean. We conducted a descriptive study, in which a questionnaire was administered, via telephone, to key policy-making representatives from six English-speaking Caribbean nations, in order to assess the current OSH environment in their countries. We also did a situational analysis of current OSH regulations and legislation within the six countries. We found that that some of the countries' OSH laws are out of date or are limited to a certain type of industry. We also found that there is very little documentation on research on exposure to and risks from hazards and on psychological and reproductive health as related to OSH. It is recommended that these Caribbean countries both increase national OSH awareness and strengthen enforcement of OSH regulations. Additionally, further assistance and a more coordinated effort from intergovernmental bodies could help build and fortify OSH systems in the Caribbean.

Assessment of current occupational safety and health regulations and legislation in the Caribbean / Evaluación de los reglamentos y la legislación actuales sobre seguridad y salud de los trabajadores en el Caribe

ABSTRACT Neglecting occupational safety and health (OSH) can have adverse and even deadly consequences. While OSH is important in any nation, the issue is particularly concerning in developing countries, including ones in the Caribbean. The purpose of this study, which was carried out in 2012 and 2013, was to examine the reasons for an apparent fundamental lack of awareness of OSH in the Caribbean. We conducted a descriptive study, in which a questionnaire was administered, via telephone, to key policy-making representatives from six English-speaking Caribbean nations, in order to assess the current OSH environment in their countries. We also did a situational analysis of current OSH regulations and legislation within the six countries. We found that that some of the countries' OSH laws are out of date or are limited to a certain type of industry. We also found that there is very little documentation on research on exposure to and risks from hazards and on psychological and reproductive health as related to OSH. It is recommended that these Caribbean countries both increase national OSH awareness and strengthen enforcement of OSH regulations. Additionally, further assistance and a more coordinated effort from intergovernmental bodies could help build and fortify OSH systems in the Caribbean.(AU)

RESUMEN Descuidar la seguridad y la salud de los trabajadores puede tener consecuencias adversas e, incluso, letales. Si bien la seguridad y la salud de los trabajadores son importantes en todos los países, revisten particular importancia en los países en desarrollo, especialmente en aquellos ubicados en el Caribe. El propósito de este estudio, que se llevó a cabo en los años 2012 y 2013, fue examinar las razones de la evidente falta fundamental de conciencia sobre esta cuestión en el Caribe. Realizamos un estudio descriptivo, en el cual administramos un cuestionario telefónico a representantes clave de la formulación de políticas de seis países de habla inglesa del Caribe con el fin de evaluar la situación actual de la seguridad y la salud de los trabajadores en su país. También hicimos un análisis de la situación de los reglamentos y la legislación vigentes en los seis países. Observamos que las leyes de algunos países son obsoletas o están limitadas a un determinado tipo de industria. También observamos que es muy escasa la documentación sobre las investigaciones realizadas tanto acerca de la exposición a los riesgos como de la salud psicológica y reproductiva vinculadas a la seguridad y la salud de los trabajadores. Se recomienda que estos países del Caribe aumenten la concientización nacional sobre esta cuestión y fortalezcan el cumplimiento de los reglamentos pertinentes. Por otra parte, una mayor asistencia y un esfuerzo más coordinado de los cuerpos intergubernamentales podrían ayudar a establecer y fortificar los sistemas de seguridad y salud de los trabajadores en los países del Caribe.(AU)