May 2019 DOI 10.14302/issn.2637-6075.jpae-19-2779
Chibueze Izah SylvesterCorresponding author
Department of Biological Sciences, Bayelsa Medical University, Yenagoa, Bayelsa State, Nigeria.
This study evaluated the behavioural response and toxicity of paraquat dichloride to fingerlings of Clariasgariepinus. The fishes were acclimatized for 14 days and exposed to sublethal concentration of 0.00 ppm, 16.56 ppm, 22.08 ppm, 27.60 ppm, 33.12 ppm and 38.64 ppm. A 24 hours’ renewal bioassay was adopted in this study. Results showed that the fishes exhibited change in swimming, opercular movement, body pigmentation, surfacing and air gulping. Mortality rate increased significantly at p<0.05 as the concentration of the toxicant increased as well as the exposure period. LC50 values at 24, 48, 72 and 96 were 59.95, 47.59, 38.12 and 26.18ppm, respectively. Based on the results, Paraquat dichloride users need to discard the remains of empty cans properly to avoid contamination. Also there is need to exercise caution when using paraquat dichloride based herbicides in agricultural fields close to surface water resources.
Jan 2019 DOI 10.14302/issn.2640-690X.jfm-19-2604
Vargas RafaelCorresponding author
Facultad de Medicina, Universidad Antonio Nariño, Bogotá, Colombia.
Purpose: The perception of time and its measurements depend on subjective constructs that vary according to changes in health. The evidence has shown that cancer diagnosis induces new relationships with time in patients and caregivers. The purpose of this study was to propose a multifaceted view about time perception referred by caregivers of cancer survivors. Methods: This study used a qualitative phenomenological methodology including semi-structured interviews with caregivers of cancer survivors. Transcripts of the interviews were analyzed using an approach for intertextual analysis, taking as reference the book "Einstein's dreams". Results: The analysis of transcripts shows changes caregivers’ time perception. Participants were grouped into three essential moments related to each stage of the disease. The variations found in the perception of time in caregivers can be explained by common physiological and behavioral responses associated with the diagnosis of a chronic disease (i.e. stress, anxiety, fear, unhappiness, and sadness), which can be modified in the course of the disease. Conclusions: We propose that a holistic approach to patient and caregiver care should include management of time perception, thus establishing interventions that facilitate a change in the experience of time perception into a more pleasant experience after a cancer diagnosis. The above may result in increased quality of patient care and possibly increased quality of life of caregivers.