6 research outputs found
Possibilities of using human teeth for retrospective dosimetry: Analysis of the Techa river data
No full textDifferent methods for utilising teeth were applied for the reconstruction of internal and external doses for the population of the Techa riverside area contaminated as a result of radioactive releases from the Mayak plutonium-production facility. Information on 90Sr content in the enamel of teeth obtained from the Techa River residents has been used for the reconstruction of intakes of this nuclide. Analyses of dosimetric investigations on dental tissues performed in the Techa River region provide an understanding of the possibilities and limitations of using human teeth in retrospective dosimetry studies. © The Author 2007. Published by Oxford University Press. All rights reserved
An approach to reduction of uncertainties in internal doses reconstructed for the Techa river population
No full textA methodology was developed for reduction of uncertainties in estimates of internal dose for residents of the Techa Riverside communities, who were exposed as a result of releases of radionuclides from the Mayak plutonium production facility in 1949-56. The 'Techa River Dosimetry System' (TRDS) was specifically elaborated for reconstruction of doses. A preliminary analysis of uncertainty for doses estimated using the current version of the TRDS showed large ranges in the uncertainty of internal absorbed dose and led to suggestions of methods to reduce uncertainties. The new methodological approaches described in this paper will allow for significant reduction of uncertainties of 90Sr- dose. The major sources of reduction are: making use of individual measured values of 90Sr and through development of a Household Registry to associate unmeasured persons with measured persons living in the same household(s). © The Author 2007. Published by Oxford University Press. All rights reserved
Curcuma sumonii sp. nov., and C. wanchaii sp. nov. (Zingiberaceae), two new taxa of Curcuma subgen. Curcuma from Thailand
No full textAbstract This research presents the discovery of two novel taxa, Curcuma sumonii Saensouk, P.Saensouk, Boonma & Techa, and C. wanchaii Saensouk, P.Saensouk, Maknoi & Boonma, belonging to the Curcuma subgenus Curcuma. Curcuma sumonii was collected in Sukhothai Province, Northern Thailand, while C. wanchaii was found in Kanchanaburi Province, Southwestern Thailand. Our study provides a comprehensive documentation of their morphological attributes, including detailed descriptions supported by visual aids. In addition to morphological data, we offer insights into vernacular names, ecological characteristics, phenology, traditional uses, conservation status, and distribution maps. Morphological comparison Tables 1 and 2 are provided to differentiate between these newly discovered taxa and their allied species. Furthermore, we present an identification key to facilitate the differentiation of these taxa from their allied species. The findings of this study contribute to the understanding of biodiversity within the Curcuma genus and offer valuable information for further conservation efforts and taxonomic research
Dainzú: Oaxaca
No full textLa información de esta miniguía se basa en los datos disponibles a la techa de publicación de la misma en los trabajos de los arqueólogos Ignacio Bernal, Arturo Oliveros, Kent Flannery, Joyce Marcus y Eric Taladoire.Desde su Fundación, durante la Fase Rosario (600 a.C.), hasta finales de la época Monte Albán ll (250 d.C.), el sitio registró un gran crecimiento poblacional: también aumentaron sus construcciones. La arquitectura monumental, en la que se emplea la piedra, se observa en palacios y templos, a los que se revistió con estuco y decoró con bajorrelieves; su uso estaba reservado a la clase dominante ya existente; es entonces cuando se construye el Conjunto A, que muestra las figuras de jugadores de pelota y sacerdotes importantes en grandes piedras adosadas a su base. Las edificaciones domésticas comunes presentan simples basamentos de piedra con paredes de adobe y pisos de tierra.</p
Cornukaempferia puangpeniae sp. nov. and C. aurantiiflora var. vespera var. nov. (Zingiberaceae) from Northern Thailand
No full textThailand hosts a diverse array of plants in the Zingiberaceae family, with over 150 endemic species, highlighting its significance in global biodiversity. The genus Cornukaempferia stands out for its ornamental and medicinal value. During a research expedition in Northern Thailand, a previously unknown Cornukaempferia species was discovered in Sukhothai province, expanding the known distribution range. It was confirmed through comprehensive taxonomic analysis as a new species, Cornukaempferia puangpeniae. Additionally, a new variety, C. aurantiiflora var. vespera, was identified in Uttaradit Province. The genus now encompasses eight species and two varieties with the addition of these taxa, exhibiting a notable prevalence in Thailand and highlighting its significant endemism. Particularly, C. larsenii is noteworthy for being native to Thailand and Laos. Detailed morphological descriptions, including diagnoses with related taxa, were provided. The species' ecological characteristics, pollen morphology, traditional uses, and conservation status were documented. A revised key to species and varieties in the genus Cornukaempferia, including a UPGMA cluster analysis dendrogram elucidating morphological relationships within the genus, was presented. These discoveries contribute to the botanical knowledge of the region, underscoring the importance of continued exploration and conservation efforts in preserving its rich flora
Carbon footprint of higher education institutions
No full textHigher education institutions (HEIs) play a fundamental role in sustainability, promoters of innovation, science, and technology. Therefore, every day more institutions are joining the fight against global warming. One of the contributions of HEIs is the carbon footprint (CF) report, to implement policies and management systems to establish strategies to reduce polluting gas emissions from their campuses. In the present study, a systematic review was carried out for 50 reports of CF, where 94% of the studies were published from 2018 to 2022. This research compiles methodologies, scope, results, and trends in Carbon Footprint calculations and provides a procedure to evaluate CF on college campuses. This research shows that the most evaluated emission sources were the consumption of electrical energy (78%), transportation (74%), and the use of fuels (64%). In addition, the HEIs with the lowest emission factors for electricity consumption are Finland, England, and Colombia. Furthermore, establishing a specific carbon footprint guideline for universities would improve reports and allow better comparisons between HEIsLas instituciones de educación superior (IES) desempeñan un papel fundamental en la sostenibilidad, impulsando la innovación, la ciencia y la tecnología. Por ello, cada día más instituciones se suman a la lucha contra el calentamiento global. Una de las contribuciones de las IES es el informe de huella de carbono (HC), que permite implementar políticas y sistemas de gestión para establecer estrategias que reduzcan las emisiones de gases contaminantes de sus campus. En el presente estudio, se realizó una revisión sistemática de 50 informes de HC, donde el 94% de los estudios se publicaron entre 2018 y 2022. Esta investigación recopila metodologías, alcances, resultados y tendencias en el cálculo de la Huella de Carbono y proporciona un procedimiento para evaluar la HC en los campus universitarios. Esta investigación muestra que las fuentes de emisión más evaluadas fueron el consumo de energía eléctrica (78%), el transporte (74%) y el uso de combustibles (64%). Además, las IES con los factores de emisión más bajos para el consumo de electricidad son Finlandia, Inglaterra y Colombia. Asimismo, establecer una guía específica de huella de carbono para las universidades mejoraría los informes y permitiría mejores comparaciones entre IE
