A quantitative study of toxicity levels of the San Pedro River and its main tributaries around the city of Aguascalientes, Mexico was conducted. Our study determined individual CL(50) values for each sampling point at 3 different times of the year corresponding to the main seasons of the year in terms of the hydrological cycle (dry, low rain and high rain season). Those LC(50) values were used to calculate the acute. Toxicity Units (aTU) that allowed us to compare levels of toxicity along the San Pedro River and two of its main tributaries. The sample that showed highest toxicity was IPIVA. This is due to the large quantity of industrial discharges that receives. Its effluent was responsible for the largest contribution of toxicity to the San Pedro River over the three rounds of sampling of this study. Our study classified an important portion of the San Pedro River and two of its main tributaries in toxic, moderately toxic and lightly toxic. No portion of the river studied was free of toxicity, either acute or sublethal. This study demonstrated that in spite of the operation of several water treatment plants along the San Pedro River, for the most part, the water quality of the river is still unacceptable.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1080/10934520701480557 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Randomized Trial of the Four Supports Intervention for Surrogate Decision Makers in Intensive Care Units.
Am J Respir Crit Care Med
November 2024
University of Pittsburgh Department of Medicine, Pittsburgh, Pennsylvania, United States;
Rationale: Individuals acting as surrogate decision-makers for critically ill patients frequently struggle in this role and experience high levels of long-term psychological distress. Prior interventions designed solely to improve information sharing between clinicians and family members have been ineffective.
Objectives: To examine the impact of a multicomponent family support intervention on patient and family outcomes Methods: Patient-level randomized clinical trial at 6 intensive care units (ICUs) in a healthcare system in Pennsylvania.
Mapping priority areas for measles surveillance: stratifying reintroduction and transmission risk in Rio de Janeiro, Brazil.
Rev Panam Salud Publica
November 2024
Instituto de Estudos em Saúde Coletiva Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil Instituto de Estudos em Saúde Coletiva, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
Objective: To stratify areas at risk of measles transmission in the state of Rio de Janeiro, using the risk assessment tool developed by the World Health Organization and Centers for Disease Control and Prevention, with adaptations to the regional context.
Methods: This ecological study used municipalities of Rio de Janeiro state as the units of analysis. The overall risk of measles transmission was evaluated based on the scores of indicators grouped into four categories: vaccination, threat assessment, quality of health care services, and living conditions.
Molecular Characterization of a Clade 2.3.4.4b H5N1 High Pathogenicity Avian Influenza Virus from a 2022 Outbreak in Layer Chickens in the Philippines.
Pathogens
September 2024
BioAssets Corporation, Santo Tomas 4234, Batangas, Philippines.
H5 subtype high-pathogenicity avian influenza (HPAI) viruses continue to devastate the poultry industry and threaten food security and public health. The first outbreak of H5 HPAI in the Philippines was reported in 2017. Since then, H5 HPAI outbreaks have been reported in 2020, 2022, and 2023.
View Article and Find Full Text PDFExploring user usability perceptions and acceptance of chording-enabled keyboards: A perspective between human-computer interaction.
Acta Psychol (Amst)
October 2024
Department of Industrial and Systems Engineering Gokongwei College of Engineering, De La Salle University, 2401 Taft Ave., Manila 1007, Philippines. Electronic address:
In recent years, a variety of alternative keyboard designs have emerged with the primary goal of enhancing user comfort and productivity compared to conventional keyboards. The objective of this study was to determine the variables affecting the acceptance and perceptions of people towards chording-enabled keyboards. A holistic analysis was done with the use of an extended framework of unified theory of acceptance and use of technology (UTAUT2), analyzed through partial least square structural equation modeling.
View Article and Find Full Text PDFCorrelation of Macular Ganglion Cell Layer + Inner Plexiform Layer (GCL + IPL) and Circumpapillary Retinal Nerve Fiber Layer (cRNFL) Thickness in Glaucoma Suspects and Glaucomatous Eyes.
Clin Ophthalmol
August 2024
Asian Eye Institute, PHINMA Plaza, Rockwell Center, Makati, Philippines.
Purpose: The study aimed to correlate macular ganglion cell layer + inner plexiform layer (GCL + IPL) thickness and circumpapillary retinal nerve fiber layer (cRNFL) thickness and to determine the validity of GCL + IPL in the evaluation of glaucoma across different stages using the area under the curve (AUC) analysis in comparison to cRNFL.
Patients And Methods: The charts of 260 adult glaucoma suspect and glaucoma patients having macular ganglion cell analysis, optical coherence tomography (OCT) of the cRNFL and automated visual field (AVF) were reviewed. GCL + IPL thickness (average, minimum and sectoral) and sectoral cRNFL thickness were obtained.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!