Subjects -> BIOLOGY (Total: 3134 journals)
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BIOLOGY (1491 journals)                  1 2 3 4 5 6 7 8 | Last

Showing 1 - 200 of 1720 Journals sorted alphabetically
AAPS Journal     Hybrid Journal   (Followers: 27)
Abasyn Journal of Life Sciences     Open Access   (Followers: 4)
ACS Pharmacology & Translational Science     Hybrid Journal   (Followers: 3)
ACS Synthetic Biology     Hybrid Journal   (Followers: 38)
Acta Biologica Hungarica     Full-text available via subscription   (Followers: 5)
Acta Biologica Marisiensis     Open Access   (Followers: 3)
Acta Biologica Sibirica     Open Access   (Followers: 2)
Acta Biologica Turcica     Open Access   (Followers: 2)
Acta Biomaterialia     Hybrid Journal   (Followers: 32)
Acta Biotheoretica     Hybrid Journal   (Followers: 3)
Acta Chiropterologica     Full-text available via subscription   (Followers: 5)
acta ethologica     Hybrid Journal   (Followers: 7)
Acta Fytotechnica et Zootechnica     Open Access   (Followers: 3)
Acta Ichthyologica et Piscatoria     Open Access   (Followers: 5)
Acta Médica Costarricense     Open Access   (Followers: 2)
Acta Musei Silesiae, Scientiae Naturales     Open Access  
Acta Neurobiologiae Experimentalis     Open Access  
Acta Scientiae Biological Research     Open Access   (Followers: 1)
Acta Scientiarum. Biological Sciences     Open Access   (Followers: 2)
Acta Scientifica Naturalis     Open Access   (Followers: 4)
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis     Open Access   (Followers: 2)
Acta Universitatis Lodziensis : Folia Biologica et Oecologica     Open Access  
Actualidades Biológicas     Open Access   (Followers: 1)
Advanced Biology     Hybrid Journal   (Followers: 1)
Advanced Health Care Technologies     Open Access   (Followers: 12)
Advanced Journal of Graduate Research     Open Access   (Followers: 2)
Advanced Membranes     Open Access   (Followers: 7)
Advanced Quantum Technologies     Hybrid Journal   (Followers: 5)
Advances in Bioinformatics     Open Access   (Followers: 24)
Advances in Biological Regulation     Hybrid Journal   (Followers: 4)
Advances in Biology     Open Access   (Followers: 14)
Advances in Biomarker Sciences and Technology     Open Access   (Followers: 2)
Advances in Biosensors and Bioelectronics     Open Access   (Followers: 8)
Advances in Cell Biology/ Medical Journal of Cell Biology     Open Access   (Followers: 26)
Advances in Ecological Research     Full-text available via subscription   (Followers: 46)
Advances in Environmental Sciences - International Journal of the Bioflux Society     Open Access   (Followers: 17)
Advances in Enzyme Research     Open Access   (Followers: 10)
Advances in High Energy Physics     Open Access   (Followers: 26)
Advances in Human Biology     Open Access   (Followers: 9)
Advances in Life Science and Technology     Open Access   (Followers: 14)
Advances in Life Sciences     Open Access   (Followers: 6)
Advances in Marine Biology     Full-text available via subscription   (Followers: 29)
Advances in Tropical Biodiversity and Environmental Sciences     Open Access   (Followers: 5)
Advances in Virus Research     Full-text available via subscription   (Followers: 8)
Adversity and Resilience Science : Journal of Research and Practice     Hybrid Journal   (Followers: 3)
African Journal of Ecology     Hybrid Journal   (Followers: 18)
African Journal of Range & Forage Science     Hybrid Journal   (Followers: 12)
AFRREV STECH : An International Journal of Science and Technology     Open Access   (Followers: 3)
Ageing Research Reviews     Hybrid Journal   (Followers: 12)
Aggregate     Open Access   (Followers: 3)
Aging Cell     Open Access   (Followers: 23)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
AJP Cell Physiology     Hybrid Journal   (Followers: 13)
AJP Endocrinology and Metabolism     Hybrid Journal   (Followers: 14)
AJP Lung Cellular and Molecular Physiology     Hybrid Journal   (Followers: 3)
Al-Kauniyah : Jurnal Biologi     Open Access  
Alasbimn Journal     Open Access   (Followers: 1)
Alces : A Journal Devoted to the Biology and Management of Moose     Open Access  
Alfarama Journal of Basic & Applied Sciences     Open Access   (Followers: 14)
All Life     Open Access   (Followers: 4)
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Journal of Agricultural and Biological Sciences     Open Access   (Followers: 7)
American Journal of Bioethics     Hybrid Journal   (Followers: 17)
American Journal of Human Biology     Hybrid Journal   (Followers: 18)
American Journal of Medical and Biological Research     Open Access   (Followers: 5)
American Journal of Plant Sciences     Open Access   (Followers: 24)
American Journal of Primatology     Hybrid Journal   (Followers: 17)
American Naturalist     Full-text available via subscription   (Followers: 80)
Amphibia-Reptilia     Hybrid Journal   (Followers: 5)
Anaerobe     Hybrid Journal   (Followers: 3)
Analytical Methods     Hybrid Journal   (Followers: 7)
Analytical Science Advances     Open Access   (Followers: 1)
Anatomia     Open Access   (Followers: 14)
Anatomical Science International     Hybrid Journal   (Followers: 3)
Animal Cells and Systems     Hybrid Journal   (Followers: 4)
Animal Microbiome     Open Access   (Followers: 6)
Animal Models and Experimental Medicine     Open Access  
Annales françaises d'Oto-rhino-laryngologie et de Pathologie Cervico-faciale     Full-text available via subscription   (Followers: 2)
Annales Henri Poincaré     Hybrid Journal   (Followers: 2)
Annales Universitatis Mariae Curie-Sklodowska, sectio C – Biologia     Open Access   (Followers: 1)
Annals of Applied Biology     Hybrid Journal   (Followers: 7)
Annals of Biomedical Engineering     Hybrid Journal   (Followers: 18)
Annals of Human Biology     Hybrid Journal   (Followers: 6)
Annals of Science and Technology     Open Access   (Followers: 2)
Annual Research & Review in Biology     Open Access   (Followers: 1)
Annual Review of Biomedical Engineering     Full-text available via subscription   (Followers: 18)
Annual Review of Biophysics     Full-text available via subscription   (Followers: 23)
Annual Review of Cancer Biology     Full-text available via subscription   (Followers: 3)
Annual Review of Cell and Developmental Biology     Full-text available via subscription   (Followers: 40)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 13)
Annual Review of Genomics and Human Genetics     Full-text available via subscription   (Followers: 31)
Annual Review of Phytopathology     Full-text available via subscription   (Followers: 10)
Anthropological Review     Open Access   (Followers: 28)
Antibiotics     Open Access   (Followers: 12)
Antioxidants     Open Access   (Followers: 4)
Antioxidants & Redox Signaling     Hybrid Journal   (Followers: 7)
Antonie van Leeuwenhoek     Hybrid Journal   (Followers: 3)
Anzeiger für Schädlingskunde     Hybrid Journal   (Followers: 1)
Apidologie     Hybrid Journal   (Followers: 4)
Apmis     Hybrid Journal   (Followers: 1)
APOPTOSIS     Hybrid Journal   (Followers: 5)
Applied Biology     Open Access  
Applied Bionics and Biomechanics     Open Access   (Followers: 4)
Applied Phycology     Open Access   (Followers: 1)
Applied Vegetation Science     Full-text available via subscription   (Followers: 9)
Aquaculture Environment Interactions     Open Access   (Followers: 7)
Aquaculture International     Hybrid Journal   (Followers: 25)
Aquaculture Reports     Open Access   (Followers: 3)
Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society     Open Access   (Followers: 9)
Aquatic Biology     Open Access   (Followers: 9)
Aquatic Ecology     Hybrid Journal   (Followers: 42)
Aquatic Ecosystem Health & Management     Hybrid Journal   (Followers: 16)
Aquatic Science and Technology     Open Access   (Followers: 4)
Aquatic Toxicology     Hybrid Journal   (Followers: 26)
Arabian Journal of Scientific Research / المجلة العربية للبحث العلمي     Open Access  
Archaea     Open Access   (Followers: 3)
Archiv für Molluskenkunde: International Journal of Malacology     Full-text available via subscription   (Followers: 1)
Archives of Biological Sciences     Open Access  
Archives of Microbiology     Hybrid Journal   (Followers: 9)
Archives of Natural History     Hybrid Journal   (Followers: 8)
Archives of Oral Biology     Hybrid Journal   (Followers: 2)
Archives of Virology     Hybrid Journal   (Followers: 6)
Archivum Immunologiae et Therapiae Experimentalis     Hybrid Journal   (Followers: 2)
Arctic     Open Access   (Followers: 9)
Arid Ecosystems     Hybrid Journal   (Followers: 2)
Arquivos do Instituto Biológico     Open Access   (Followers: 1)
Arquivos do Museu Dinâmico Interdisciplinar     Open Access  
Arthropod Structure & Development     Hybrid Journal   (Followers: 1)
Arthropod Systematics & Phylogeny     Open Access   (Followers: 5)
Artificial DNA: PNA & XNA     Hybrid Journal   (Followers: 2)
Artificial Intelligence in the Life Sciences     Open Access   (Followers: 1)
Asian Bioethics Review     Full-text available via subscription   (Followers: 2)
Asian Journal of Biological Sciences     Open Access   (Followers: 2)
Asian Journal of Biology     Open Access  
Asian Journal of Biotechnology and Bioresource Technology     Open Access  
Asian Journal of Cell Biology     Open Access   (Followers: 4)
Asian Journal of Developmental Biology     Open Access   (Followers: 1)
Asian Journal of Medical and Biological Research     Open Access   (Followers: 3)
Asian Journal of Nematology     Open Access   (Followers: 4)
Asian Journal of Poultry Science     Open Access   (Followers: 3)
Atti della Accademia Peloritana dei Pericolanti - Classe di Scienze Medico-Biologiche     Open Access  
Australian Life Scientist     Full-text available via subscription   (Followers: 2)
Australian Mammalogy     Hybrid Journal   (Followers: 8)
Autophagy     Hybrid Journal   (Followers: 8)
Avian Biology Research     Hybrid Journal   (Followers: 4)
Avian Conservation and Ecology     Open Access   (Followers: 18)
Bacterial Empire     Open Access   (Followers: 1)
Bacteriology Journal     Open Access   (Followers: 2)
Bacteriophage     Full-text available via subscription   (Followers: 2)
Bangladesh Journal of Bioethics     Open Access  
Bangladesh Journal of Plant Taxonomy     Open Access  
Bangladesh Journal of Scientific Research     Open Access  
Berita Biologi     Open Access  
Between the Species     Open Access   (Followers: 2)
BIO Web of Conferences     Open Access  
Bio-Grafía. Escritos sobre la Biología y su enseñanza     Open Access  
Bio-Lectura     Open Access  
BIO-SITE : Biologi dan Sains Terapan     Open Access  
Bioactive Compounds in Health and Disease     Open Access   (Followers: 1)
Biocatalysis and Biotransformation     Hybrid Journal   (Followers: 4)
BioCentury Innovations     Full-text available via subscription   (Followers: 2)
Biochemistry and Cell Biology     Hybrid Journal   (Followers: 18)
Biochimie     Hybrid Journal   (Followers: 2)
BioControl     Hybrid Journal   (Followers: 2)
Biocontrol Science and Technology     Hybrid Journal   (Followers: 5)
Biodemography and Social Biology     Hybrid Journal   (Followers: 1)
BIODIK : Jurnal Ilmiah Pendidikan Biologi     Open Access  
BioDiscovery     Open Access   (Followers: 2)
Biodiversitas : Journal of Biological Diversity     Open Access   (Followers: 2)
Biodiversity : Research and Conservation     Open Access   (Followers: 30)
Biodiversity Data Journal     Open Access   (Followers: 7)
Biodiversity Informatics     Open Access   (Followers: 3)
Biodiversity Information Science and Standards     Open Access   (Followers: 2)
Biodiversity Observations     Open Access   (Followers: 2)
Bioeduca : Journal of Biology Education     Open Access   (Followers: 2)
Bioeduscience     Open Access   (Followers: 3)
Bioeksperimen : Jurnal Penelitian Biologi     Open Access  
Bioelectrochemistry     Hybrid Journal   (Followers: 1)
Bioelectromagnetics     Hybrid Journal   (Followers: 1)
Bioenergy Research     Hybrid Journal   (Followers: 3)
Bioengineering and Bioscience     Open Access   (Followers: 1)
BioEssays     Hybrid Journal   (Followers: 10)
Bioethica     Open Access   (Followers: 1)
Bioethics     Hybrid Journal   (Followers: 20)
BioéthiqueOnline     Open Access   (Followers: 1)
Biogeographia : The Journal of Integrative Biogeography     Open Access   (Followers: 2)
Biogeosciences (BG)     Open Access   (Followers: 18)
Biogeosciences Discussions (BGD)     Open Access   (Followers: 3)
Bioinformatics     Hybrid Journal   (Followers: 288)
Bioinformatics Advances : Journal of the International Society for Computational Biology     Open Access   (Followers: 4)
Bioinformatics and Biology Insights     Open Access   (Followers: 14)
Biointerphases     Open Access   (Followers: 1)
Biojournal of Science and Technology     Open Access  
BioLink : Jurnal Biologi Lingkungan, Industri, Kesehatan     Open Access  
Biologia     Hybrid Journal   (Followers: 1)
Biologia Futura     Hybrid Journal  
Biologia on-line : Revista de divulgació de la Facultat de Biologia     Open Access  
Biological Bulletin     Partially Free   (Followers: 6)
Biological Control     Hybrid Journal   (Followers: 6)

        1 2 3 4 5 6 7 8 | Last

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Actualidades Biológicas
Number of Followers: 1  

  This is an Open Access Journal Open Access journal
ISSN (Print) 0304-3584 - ISSN (Online) 2145-7166
Published by SciELO Homepage  [688 journals]
  • Chemical composition of Artemesia herba-alba essential oil and its
           larvicidal and pupicidal effects against Culex pipiens (Diptera;
           Culicidae)

    • Abstract: Abstract Artemisia herba-alba Asso (A. herba-alba) (Asteraceae) is widely used in herbal medicine as it is a mine of natural molecules such as davanone, which is an interesting product on the international market. The present research proposes a method for controlling the late larval (L4) and pupal stages of Culex pipiens based on the essential oil of A. herba-alba. The aerial part of this plant was extracted by hydrodistillation and then analyzed by gas chromatography coupled with mass spectrometry (CPG/SM) to determine its chemical composition. Three concentrations (1, 5 and 10 μl/ml) were prepared and directly tested on larvae (L4) and pupae under laboratory conditions to measure LC50, LC90, LT50, and LT90 values. The yield obtained in this study was 1.5%. Further, the analysis showed that the oil of A. herba-alba is a davanone chemotype that consists mainly of davanone (48.8%). The efficiency of this essential oil for toxicological parameters (LC50 and LC90) were 3.278 μl/ml and 7.573 μl/ml for larvae, and 1.213 μl/ml and 2.288 μl/ml for pupae. This study indicates that the essential oil of A. herba-alba has toxic properties for Cx. pipiens larvae and pupae. These results are encouraging and open up exciting and promising horizons for its application in the production of bioinsecticides.Resumen Artemisia herba-alba (A. herba-alba) (Asteraceae) es ampliamente utilizada en fitoterapia ya que tiene una verdadera mina de moléculas naturales como la davanona, que es un producto muy interesante en el mercado internacional. La presente investigación propone un método para el control de los estadios preimaginarios de Culex pipiens (L4 y pupas) a base de aceite esencial de A. herba-alba. La parte aérea de esta planta fue extraída por hidrodestilación, luego fue analizada por cromatografía de gases acoplada a la espectrometría de masas (CPG/SM) para la determinación de su composición química. Se prepararon tres concentraciones (1, 5 y 10 μl/ml) y se probaron directamente en larvas (L4) y pupas en condiciones de laboratorio para medir los valores LC50, LC90, LT50 y LT90. El rendimiento obtenido en este estudio fue del 1,5%, además el análisis mostró que el aceite de A. herba-alba es un quimiotipo de davanona que consiste principalmente en davanona (48,8%). La eficiencia de este aceite esencial se expresa por los parámetros toxicológicos calculados en la CL50 y CL90, para larvas de 3,278 μl/ml y 7,573 μl/ml, y para pupas 1,213 μl/ml y 2,288 μl/ml, respectivamente. Este estudio muestra que el aceite esencial de A. herba-alba tiene propiedades tóxicas sobre larvas y pupas de Culex pipiens. Estos resultados son alentadores y abren interesantes y prometedores horizontes para su aplicación en la producción de bioinsecticidas.
       
  • Atmospheric pollutants and their impact on murine and human reproduction

    • Abstract: ABSTRACT Atmospheric pollution is caused by the presence or combination of physical, chemical, or biological pollutants in the air. In recent years, the most studied pollutant is particulate matter (PM), a varied mixture of solid and liquid particles. PM also carry highly toxic components from cigarette smoke combustion, with different microscopic sizes present in the atmosphere that can be inhaled and cause serious health problems due to toxicity at the cellular level and consequences at the inflammatory level. Currently, exposure to PM is associated with alterations in processes of reproduction in mammals, affecting gamete and embryo viability. The objective of this review is to describe the effects of atmospheric pollutants on reproductive processes and the possible mechanisms of action, both cellular and molecular, which are of interest in human and animal health sciences. Studies show a cause and effect relationship between exposure to pollutants and gamete quality, with pollutants causing DNA damage, epigenetic modifications, an increase in oxidative stress and alterations in morphology. Likewise, effects in the prenatal and postnatal period are reported, such as premature births, low birth weight and spontaneous abortion. The results of this review show that atmospheric pollutants negatively influence reproductive processes in some mammals, as they can alter the mechanisms of oxidative regulation and regulation of gene expression in gametes, leading to cell toxicity and potential alterations in genomic stability.RESUMEN La contaminación atmosférica se da por la presencia o combinación de contaminantes físicos, químicos o biológicos en el aire. En los últimos años, el más estudiado es el material particulado (PM), una mezcla variada de partículas sólidas y líquidas, que, además, transporta elevados componentes tóxicos provenientes de la combustión del humo del cigarrillo, con diferentes tamaños microscópicos presentes en la atmósfera, las cuales pueden inhalarse y provocar graves problemas de salud debido a la toxicidad a nivel celular y consecuencias a nivel inflamatorio. Actualmente, la exposición al PM se ha asociado con alteraciones en los procesos reproductivos en mamíferos, afectando la viabilidad de gametos y embriones. El objetivo de esta revisión fue describir los efectos de los contaminantes atmosféricos en el ámbito reproductivo y los posibles mecanismos de acción tanto celulares como moleculares, los cuales son de interés en las ciencias de la salud humana y animal. Los estudios evidencian una relación de causa-efecto entre la exposición a los contaminantes y la calidad de los gametos, generando daños del ADN, modificaciones epigenéticas, aumento de estrés oxidativo y alteraciones morfológicas. Asimismo, se reportan efectos en el periodo prenatal y postnatal, como nacimientos prematuros, neonatos con bajo peso y abortos espontáneos. Los resultados de revisión evidencian que los contaminantes atmosféricos influyen negativamente en el proceso reproductivo de algunos mamíferos, debido a que pueden alterar los mecanismos de regulación oxidativa y regulación en la expresión génica en los gametos, lo que conlleva a toxicidad celular y potenciales alteraciones en la estabilidad genómica.
       
  • Floristic composition and richness of the vascular flora of Mangomarca’s
           fog oasis, Lima, Peru, from 2013 to 2014

    • Abstract: Abstract Fog oasis is an ecosystem composed of abundant and seasonal xerophilous herbaceous vegetation, which are exclusively distributed as vegetation patches throughout the coastal deserts of Peru and Chile. Fog oases present a great floristic diversity, with many endemic species within the Peruvian territory. Nevertheless, these ecosystems are classified as fragile due to their decreasing surfaces, caused by urban growth. It is necessary to investigate the variation in species composition of their altitudinal gradients in order to understand their biogeography and ecology, thereby contributing to plans of conservation. The present study determined the floristic composition of the vascular flora of the Mangomarca’s fog oasis during the 2013-2014 period. We examined the different altitude ranges, and determined whether altitude in those ranges shapes species richness and composition. We recorded 53 species, 86.8% of which were native and 22.6% endemic. The vast majority were herbaceous species (74% of the total species), and only one tree species was identified, Vasconcellea candicans (Caricaceae). The altitude range of 500-650 meters above sea level presented the highest richness (41 species). There were 16 species distributed in the three altitudinal ranges examined.Resumen Las lomas costeras son ecosistemas compuestos por abundante vegetación herbácea xerófila y estacional, únicamente distribuidas a manera de islas a lo largo del desierto costero de Perú y Chile. Este ecosistema presenta una gran diversidad florística y muchas especies endémicas dentro del territorio peruano, sin embargo, han sido clasificados como frágiles por la disminución de sus superficies, debido al crecimiento urbano. Es posible contribuir al conocimiento y conservación de este ecosistema mediante el estudio de su composición florística a lo largo de gradientes altitudinales y diversidad. Por tanto, el objetivo de este estudio fue determinar la composición florística y riqueza de la flora vascular de las Lomas de Mangomarca durante el periodo 2013 y 2014, a lo largo de tres diferentes rangos altitudinales y establecer si el efecto de los tres rangos altitudinales es significativo para afirmar que se tienen tres grupos de comunidades vegetales diferentes en estas Lomas. Se registraron 53 especies, siendo el 86,8% nativas y el 22,6% endémicas. La gran mayoría fueron especies herbáceas (74% del total de especies), y solamente una especie arbórea fue registrada, Vasconcellea candicans (Caricaceae). El rango altitudinal de 500-650 msnm fue el que presentó la mayor riqueza (41 especies) y 16 especies se encontraron dentro de los tres rangos altitudinales estudiados.
       
  • Assessment of the potential of native yeast isolated from industrial
           residual waters in the removal of azoic dyes

    • Abstract: ABSTRACT Azo dyes, widely used in the textile industry, release contaminating effluents that affect different organisms due to their toxicity and recalcitrant nature. Recognizing the role of yeasts in the bioremediation of different contaminated environments, the objective of this study was to evaluate the potential of native yeasts isolated from contaminated water sources in the removal of the azo dye Novasyn blue light BLR. We isolated 15 yeast colonies able to grow in the presence of Novasyn blue light BLR dye and determined their ability to remove the dye in a synthetic medium, obtaining colonies with removal percentages greater than 60%. We selected one colony, MA011, identified as Hanseniaspora opuntinae, to evaluate the effect of the culture media composition, pH, and dye concentration on the removal capacity of the yeast. The results showed that dye concentration and pH have a significant effect on the removal percentage. In addition, differing dye concentrations on the growth and removal capacity of H. opuntinae were evaluated, with a toxic effect of the dye not observed up to 2000 ppm. However, we found that high dye concentrations decreased the removal capacity of the yeast. Finally, we evaluated the removal capacity of H. opuntinae in wastewater, observing no changes in the spectrophotometric profile of the dye before and after the interaction with the yeast, suggesting that dye removal by H. opuntinae occurs by biosorption.RESUMEN Los colorantes azoicos son ampliamente utilizados en la industria textil, liberando efluentes contaminados que afectan a diferentes organismos por su toxicidad y carácter recalcitrante. Reconociendo el papel de las levaduras en la biorremediación de diferentes ambientes contaminados, el objetivo de este estudio fue evaluar el potencial de levaduras nativas aisladas de fuentes hídricas contaminadas en la remoción del colorante azoico azul Novasyn luz BLR. Se aislaron 15 colonias de levaduras con capacidad de crecer en presencia del colorante, con éstas se realizaron ensayos de remoción en medio sintético en los que se obtuvieron porcentajes de remoción superiores al 60%. La colonia MA011 identificada como Hanseniaspora opuntinae fue seleccionada para evaluar el efecto de la composición del medio de cultivo, el pH y la concentración del colorante en su capacidad de remoción. Los resultados demostraron que la concentración de colorante y el pH tienen un efecto significativo sobre el porcentaje de remoción; además se evaluó el efecto de diferentes concentraciones de colorante sobre el crecimiento y la capacidad de remoción de H. opuntinae y no se evidenció un efecto tóxico del colorante hasta 2000 ppm; sin embargo, se observó que a concentraciones más altas del colorante disminuye la capacidad de remoción. Finalmente se evaluó la capacidad de remoción de H. opuntinae en aguas residuales y no se observaron cambios en el perfil espectrofotométrico del colorante antes y después de la interacción con la levadura, lo que permite sugerir que la remoción del colorante por H. opuntinae se da por biosorción.
       
  • Determination of bacterial microbiological quality in Oreochromis
           niloticus and Coptodon rendalli tissue from Porce II and Porce III
           reservoirs, Antioquia - Colombia

    • Abstract: ABSTRACT The Porce II and Porce III reservoirs are located northeastern of the department of Antioquia, have poor water quality due to the entry of chemical and biological contaminants from domestic and industrial wastewater discharge from ten municipalities that are part of the Aburrá Valley. Artisanal fisheries have been reported in the reservoirs with low safety standards for self-consumption and commercialization. Food safety is fundamental for the assurance of public health. Colombian regulations for the consumption of fishery products focus on risk prevention and warn of improper handling and/or contamination of the fishery product (NTC1443:2016 and Resolution:776/2008, modified by Resolution:122/2012). This project sought to determine the bacterial microbiological quality of Oreochromis niloticus and Coptodon rendalli muscle from Porce II and Porce III reservoirs by analyzing the indicators total coliforms, thermo-tolerant Escherichia coli, Staphylococcus aureus and Salmonella spp. in eight samplings between March 2018 and October 2019, 480 specimens were purchased from local fishermen. Total length, standard length, and weight of each fish was determined, and microbiological indicators were analyzed following Colombian standards (NTC4458, NTC4779, NTC4574). Under these criteria, more than 80% of the samples showed non-compliance because they exceeded the permitted limits for microbial load. The health risk for human and wild communities that feed on these contaminated fish is inferred.RESUMEN Los embalses Porce II y Porce III ubicados al nordeste del departamento de Antioquia presentan baja calidad del agua debido al ingreso de contaminantes químicos y biológicos provenientes de las descargas de aguas residuales de origen doméstico e industrial de diez municipios que conforman el Valle de Aburrá. En los embalses se ha reportado el desarrollo de pesquería artesanal con bajos estándares de inocuidad para su autoconsumo y comercialización. La seguridad alimentaria es fundamental para el aseguramiento de la salud pública, la normatividad colombiana para el consumo de productos pesqueros se enfoca en la prevención de riesgos y advierten oportunamente un manejo inadecuado y/o contaminación del producto pesquero (NTC1443:2016 y Resolución:776/2008, modificada por la Resolución:122/2012). En este proyecto se buscó determinar la calidad microbiológica bacteriana del músculo de Oreochromis niloticus y Coptodon rendalli proveniente de los embalses Porce II y Porce III a partir del análisis de indicadores de coliformes totales, Escherichia coli termotolerante, Staphylococcus aureus y Salmonella spp. usando microbiología convencional. En ocho muestreos entre marzo de 2018 y octubre de 2019, se compraron a pescadores locales 480 ejemplares, a los cuáles se les determinó la longitud total, longitud estándar y peso de cada pez y se analizaron los indicadores microbiológicos siguiendo las normativas colombianas (NTC4458, NTC4779, NTC4574). Bajo estos criterios, más del 80% de las muestras demostraron no conformidad ya que sobrepasaron los límites permitidos en cuanto a carga microbiana, por lo tanto, se infiere riesgo para la salud de comunidades humanas y silvestres que se alimenten de estos peces contaminados.
       
  • Inferring the effect of abiotic factors on body temperature and water loss
           in agar models of the Sabanera frog (Dendropsophus molitor) in Cajicá-
           Cundinamarca

    • Abstract: Abstract Amphibians have physiological restrictions on the permeability of their skin due to a high probability of dehydration by evapotranspiration in environments with high temperatures and low water availability.Dendropsophus molitoris a semi-aquatic species with basking behavior that uses thermoregulatory mechanisms to carry out vital processes. Therefore, our objective was to evaluate the effect of environmental variables, microhabitat type, and color on body temperature and water loss inD. molitor. We used agar models with two color patterns placed in two types of microhabitats (wet and dry), each with two conditions (sun and shade), and measured the percentage of weight change and body temperature. We used statistical analyzes such as correlation, linear mixed effects models, and the variance inflation factor method. In our study, the color of the agar models was not significant. However, the variables dew point, relative humidity, solar radiation, substrate temperature, and microhabitat each affected the percentage of weight change and body temperature. Both variables increased between the dry and sunny microhabitat conditions and the dry and shaded conditions between 12:00 and 16:00 hours. Evapotranspiration is closely related to radiation, and the vapor pressure deficit is relevant to amphibian body temperature because they cool by the evapotranspiration of water through their skin. Finally, variables at the microhabitat level are vital for these species and should be incorporated into this kind of work.Resumen La alta permeabilidad de la piel representa una restricción fisiológica en anfibios, debido a un mayor riesgo de deshidratación por evapotranspiración en ambientes con menor disponibilidad de agua y mayor temperatura. Dendropsophus molitor es una especie semiacuática con comportamiento de tomar el sol, mecanismo termorregulatorio, necesario para llevar a cabo sus procesos vitales. El objetivo de este trabajo fue evaluar el efecto de las variables ambientales, tipo de microhábitat y color, sobre la temperatura corporal y pérdida de agua en D. molitor. Para esto, se usaron modelos de agar de dos colores, ubicados en dos tipos de microhábitat (húmedo vs. seco), cada uno en dos condiciones de exposición (sol vs. sombra), midiendo el porcentaje de cambio de peso y temperatura corporal. Se realizaron análisis estadísticos como correlación, modelos de efectos lineares mixtos, y el método del factor de inflación de la varianza. Los resultados del estudio mostraron que el punto de rocío, la humedad relativa, la radiación solar, la temperatura del sustrato y el microhábitat, pero no el color de los modelos de agar, tuvieron un efecto significativo sobre el porcentaje de cambio de peso y la temperatura corporal. Ambas variables incrementaron en la condición microhábitat seco y sol, así como en seco y sombra, entre las 12:00 y 16:00 horas. La evapotranspiración está íntimamente relacionada con la radiación y el déficit de presión de vapor, siendo importante para la temperatura corporal del anfibio, debido a que éste se enfría mediante la evapotranspiración del agua a través de su piel. Por último, se sugiere que las variables a nivel del microhábitat son vitales para estas especies, y deberían ser incorporadas en este tipo de estudios.
       
 
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