Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 8 de 8
Filtrar
1.
J Zoo Wildl Med ; 52(1): 49-56, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33827160

RESUMO

Lung function (breath duration, respiratory flow [V̇], and tidal volume [VT]), and end-expiratory O2 were measured in 19 adult bottlenose dolphins (Tursiops spp.) while at rest in water or beached for up to 10 min. The results show that inspiratory VT, expiratory VT, or inspiratory V̇ did not differ on land or in water. The average expiratory V̇ for all dolphins on land decreased by 16%, and the expiratory and total breath durations increased by 5% and 4%, respectively, compared with in water. There were temporal changes observed during beaching, where expired and inspired VT and inspired V̇ decreased by 13%, 16%, and 9%, respectively, after 10 min on land. These data suggest that dolphins compensate for the effect of gravity by adjusting respiration to maintain alveolar ventilation and gas exchange, but during extended durations, the increased work of breathing may impede ventilation and gas exchange. Continuous monitoring of lung function and gas exchange may help prevent long-term damage during out-of-water medical procedures, optimize animal transport conditions, and improve survival during stranding events.


Assuntos
Golfinho Nariz-de-Garrafa/fisiologia , Taxa Respiratória , Volume de Ventilação Pulmonar , Animais , Feminino , Masculino , Troca Gasosa Pulmonar , Fenômenos Fisiológicos Respiratórios
2.
Sci Total Environ ; 874: 162507, 2023 May 20.
Artigo em Inglês | MEDLINE | ID: mdl-36871744

RESUMO

Cow milk is a fundamental nutrients source for the human diet at all stages of life. However, the decline in cow milk consumption over the years has been driven by increased consumer awareness of animal welfare and the environmental burdens associated. In this regard, different initiatives have emerged to mitigate the impacts of livestock farming, but many of them without addressing the multi-perspective view of environmental sustainability. Thus, the Water-Energy-Food (WEF) nexus emerges as a framework to consider the complex synergies among carbon emissions, water demand, energy requirements and food production. In this study, a novel and harmonised WEF nexus approach has been proposed and applied to evaluate a set of 100 dairy farms. For that, the assessment, normalisation, and weighting of three lifecycle indicators such as carbon, water and energy footprints, as well as the milk yield were carried out to obtain a single value, the WEF nexus index (WEFni), which varies from 0 to 100. Results show that the WEF nexus scores obtained vary from 31 to 90, demonstrating large differences among the farms assessed. A cluster ranking was performed to identify those farms with the worst WEF nexus indexes. For this group, consisting of 8 farms with an average WEFni of 39, three improvement actions focused on the feeding, digestive process and wellbeing of the cows were applied to determine the potential reduction in the two main hotspots identified: cow feeding and milk production level. The proposed methodology can establish a roadmap for promoting a more environmentally sustainable food industry, although further studies are still required in the pathway of a standardised WEFni.


Assuntos
Agricultura , Água , Feminino , Animais , Bovinos , Humanos , Fazendas , Água/metabolismo , Abastecimento de Água , Leite/metabolismo , Indústria de Laticínios/métodos
3.
Sci Total Environ ; 738: 139538, 2020 Oct 10.
Artigo em Inglês | MEDLINE | ID: mdl-32540600

RESUMO

Eco-efficiency has become a cornerstone for any company that seeks to improve their environmental and economic aspects. In this context, the joint use of Life Cycle Assessment and Data Envelopment Analysis, known as LCA + DEA methodology, is an emerging and growing line of research. LCA estimates the environmental impacts of the products or services, while DEA evaluates their efficiency, providing targets and benchmarks for the inefficient ones. In this way, both the environmental and economic aspects are considered in the eco-efficiency assessment. Since LCA + DEA methodology is a novel research line, a literature review is necessary to depict its full scope and to support researchers and practitioners. This manuscript presents the first comprehensive and structured literature review of the joint use of LCA and DEA for eco-efficiency assessment. We propose a taxonomy for the reviewed articles based on the theoretical and practical issues of LCA + DEA methodology and classify them accordingly. This classification allows recognizing and discussing the main findings, which offer some managerial implications for professionals who want to start employing this methodology. In addition, a procedure for selecting a suitable method is proposed and the main limitations and research opportunities are identified. Finally, this review could be a starting point and a guide for systematically building knowledge about the in the joint use of LCA and DEA for eco-efficiency assessment.

4.
PhytoKeys ; 135: 21-34, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31736629

RESUMO

Two new species of Chlorospatha (section Orientales) from the western slope of the Cordillera Occidental in the departments of Valle del Cauca and Choco (Colombia) are described here. The new species represent the first records of section Orientales for Colombia, which was previously known only from the eastern Andes in Ecuador. The two new species are similar to C. longipoda, C. hannoniae and C. boosii. Chlorospatha minima sp. nov. is differentiated by its small overall size (less than 30 cm tall), blade strongly inequilateral with smooth adaxial surface, and spadix less than 2.2 cm long. Chlorospatha silverstonei sp. nov. is differentiated by its large overall size (30-60 cm tall), 1-3 leaves per plant, and quilted adaxial blade surface.

5.
Sci Total Environ ; 659: 1266-1282, 2019 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-31096339

RESUMO

Nowadays, sustainability has become of increasing concern in policy and the decision making of stakeholders. Companies have been increasing their attention to their environmental performance. In order to measure sustainability performance, different approaches have been proposed. The joint application of Life Cycle Assessment (LCA) and Data Envelopment Analysis (DEA), called LCA+DEA, is used to assess eco-efficiency, which is to produce more with less environmental impact and with fewer resources. In this manuscript, we compare two methods that implement the LCA+DEA approach, the five-step and four-step methods, focused on Carbon Footprint (CF), called CF+DEA. These methods have not been compared previously. This comparison will encompass the theoretical and practical points of view according to efficiency indices, best practices, and targets for the CF emissions. To perform this comparison, we use a case study of raspberry producers in Chile. From a practical point of view, we have observed that both methods have achieved the main objective of reducing CF. Moreover, results show similar eco-efficiency scores; the targets given by the five-step method are less demanding than those given by the four-step method. In this sense, the four-step method provides a higher average CF reduction. This is due to the inclusion of CF as an undesirable output in the DEA assessment and the use of an output-oriented DEA model. Additionally, in including the CF within the DEA assessment, the four-step method reflects better the definition of eco-efficiency. Following these results, it is advisable to implement the targets provided by the five-step method for a short term and then the targets provided by the four-step method for a mid-term or long term.

8.
Saude e pesqui. (Impr.) ; 12(2): 265-273, maio/ago 2019. tab
Artigo em Português | LILACS | ID: biblio-1015824

RESUMO

O estudo teve como objetivo avaliar 81 profissionais de educação física egressos de uma universidade comunitária sobre o conhecimento do conceito ampliado de saúde na sua formação. Trata-se de uma pesquisa quantitativa por meio da aplicação de um questionário online. Os resultados mostraram a predominância de profissionais do sexo masculino (56%), faixa etária de 20 a 25 anos (55%), carga horária de trabalho semanal de mais de 20 horas (67%), renda de até R$2.000,00 mensais (78%), dos quais 14% não apresentavam conhecimento do conceito ampliado de saúde. Além disso, verificou-se uma associação significativa entre a modalidade de formação e o conceito ampliado de saúde. Em vista dos achados observados, torna-se necessário consolidar a formação deste profissional na saúde coletiva para inserção nas equipes multiprofissionais.


Current analysis aimed at evaluating 81 professionals in physical education recently graduated with regard to their knowledge on extended health concept in their formation, by means of a quantitative research with an online questionnaire. Results revealed the predominance of male professionals (56%), age bracket 20-25 years (55%), weekly work load of more than 20 h (67%), and an monthly income of R$2,000 (78%) Fourteen percent did not know anything on extended health concept. There was a significant association between training modality and extended health concept. Results showed the need for the consolidation in the formation of professionals in community health for insertion in multiprofessional teams.


Assuntos
Humanos , Masculino , Feminino , Adulto , Educação Física e Treinamento , Saúde Pública , Educação Profissional em Saúde Pública
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA