Philippe Apparicio¹ , Jérémy Gelb¹, Paula Negron-Poblete², Mathieu Carrier¹, Stéphanie Potvin¹ , Élaine Lesage-Mann¹

Revue Internationale de Géomatique, Vol.30, No.2, pp. 155-179, 2020, DOI:10.3166/rig.2021.00110

Abstract Air pollution and road traffic noise are two important environmental nuisances that could be harmful to the health and well-being of urban populations. In Mexico City, as in many North American cities, there has been an upsurge in bicycle ridership. However, Mexico City is also well known for having high levels of noise and air pollution. The purpose of this study is threefold: 1) evaluate cyclists’ exposure to air pollution (nitrogen dioxide) and road traffic noise; 2) identify local factors that increase or reduce cyclists’ exposure, in paying particular attention to the type of road and bicycle path or lane… More >

Victoria Gonzáles-Gutierrez¹, Aldo Alvarez-Risco², Alfredo Estrada-Merino², María de las Mercedes Anderson-Seminario², Sabina Mlodzianowska², Shyla Del-Aguila-Arcentales³, Jaime A. Yáñez^4,5,*

International Journal of Mental Health Promotion, Vol.24, No.4, pp. 565-581, 2022, DOI:10.32604/ijmhp.2022.021176

Abstract The current study measures the influence of multitasking behavior and self-efficacy for self-regulated learning (SESRL) on perceptions of academic performance and views in university students during the COVID-19 pandemic in Mexico. 264 university students fulfilled an online questionnaire. It was observed that multitasking behavior negatively influences SESRL (−0.203), while SESRL showed a positive influence of 0.537 on perceptions of academic performance, and multitasking behavior had an influence of −0.097 on the perception of academic performance. Cronbach’s alpha and Average Variance Extracted values were 0.809 and 0.577 (multitasking behavior), 0.819 and 0.626 (SESRL), 0.873 and 0.725 (perceptions of academic performance), respectively.… More >

José Carmen Soto-Correa¹, Abraham Saldaña-Vega¹, Víctor Hugo Cambrón-Sandoval¹, Laura Concostrina-Zubiri², Mariela Gómez-Romero^3,*

Phyton-International Journal of Experimental Botany, Vol.91, No.4, pp. 827-840, 2022, DOI:10.32604/phyton.2022.017929

Abstract Lichens are symbiotic organisms that comprise a fungus and a photosynthetic partner wich are recognized as a good indicator of climate change. However, our understanding of how aridity affects the diversity of saxicolous lichens in drylands is still limited. To evaluate the relationship between saxicolous lichen diversity and aridity in a central México dryland, a geographical transect was established of 100 km to build an aridity gradient in the semiarid zone of the State of Querétaro, Mexico, comprising ten sampling sites with a 10 km separation. Species richness, abundance and diversity of soil lichen species were recorded using two sampling methods: the… More >

HAZAEL RAMIRO CEJA-GALVEZ¹, ERANDIS DHENI TORRES-SÁNCHEZ¹, JUAN HERIBERTO TORRES-JASSO², EMMANUEL REYESURIBE¹, JOEL SALAZAR-FLORES^1,*

BIOCELL, Vol.45, No.5, pp. 1241-1250, 2021, DOI:10.32604/biocell.2021.015771

Abstract Paraoxonase-1 (PON-1) is an enzyme that hydrolyzes organophosphate pesticides. The presence of polymorphisms in PON-1 (L55M and Q192R) decreases its enzyme activity and increases the risk of central nervous system (CNS) toxicity in occupationally exposed farmers, leading to chronic degenerative diseases and death. We studied 103 farmers in the region of Cienega Jalisco, Mexico, which were exposed mainly to organophosphate pesticides. We used serum and plasma samples to assay PON-1 activity and perform polymorphism analysis (L55M and Q192R) using qPCR and TaqMan probes, respectively. For both polymorphisms, there was high percentage of heterozygosity (55 LL = 0.19, LM = 0.75,… More >

Carlos Eduardo Ornelas-Ramírez¹, Sergio Hernández-Verdugo^1,*, Jesús Enrique Retes-Manjarrez¹, Angel Valdez-Ortiz², Antonio Pacheco-Olvera¹, Tomás Osuna-Enciso³, Flor Porras¹

Phyton-International Journal of Experimental Botany, Vol.90, No.1, pp. 259-275, 2021, DOI:10.32604/phyton.2020.012476

Abstract The phenotypic variation and its distribution among species, morphotypes, and among and within populations was estimated in 71 populations pertaining to 15 morphotypes of three domesticated species of Capsicum from Mexico. Collections were made in the states of Sinaloa, Nayarit, Oaxaca, Tabasco, and Yucatán in two agroecosystems: Backyard-garden and monoculture. Fifteen phenotypic characteristics were analyzed through one-way variance analysis and multivariate analyses of principal components analysis (PCA) and hierarchical clustering using Ward’s method. The study was performed in a uniform greenhouse experiment. A high variation was found among and within populations in all the measured characteristics. Of the total variation,… More >

Juan Jesús Sánchez‐Barriga

Congenital Heart Disease, Vol.13, No.5, pp. 690-699, 2018, DOI:10.1111/chd.12631

Abstract Background: Congenital heart disease (CHD) represents a global health problem. In Mexico, in children <1 year of age it is the second cause of mortality. The aim was to determine mortality trends from CHD and the great vessels in children and adults nationwide, by state and socioeconomic region.
Methods: Records of mortality associated to CHD and the great vessels for 2000‐2015 were obtained from the National Institute of Statistics and Geography. This information is collected from death certificates issued nationwide. International Classification of Diseases, 10th revision, codes corresponding to the basic cause of death from CHD and the great vessels.… More >

LINDSAY G. ROSS¹, CARLOS A. MARTÍNEZ-PALACIOS², MARIA LUISA RODRÍGUEZ DE SOUSA³, ANTONIO CAMPOS-MENDOZA²

BIOCELL, Vol.30, Suppl.S, pp. 119-120, 2006

Abstract This article has no abstract. More >

MARÍA ESTHER DIUPOTEX-CHONG¹, NÉSTOR J. CAZZANIGA², ALEJANDRA HERNÁNDEZ-SANTOYO³, JOSÉ MIGUEL BETANCOURT-RULE⁴

BIOCELL, Vol.28, No.3, pp. 279-285, 2004, DOI:10.32604/biocell.2004.28.279

Abstract Mitotic chromosomes of the freshwater snail Pomacea patula catemacensis (Baker 1922) were analyzed on gill tissue of specimens from the type locality (Lake Catemaco, Mexico). The diploid number of chromosomes is 2n = 26, including nine metacentric and four submetacentric pairs; therefore, the fundamental number is FN = 52. No sex chromosomes could be identified. The same chromosome number and morphology were already reported for P. flagellata, i.e., the other species of the genus living in Mexico. The basic haploid number for family Ampullariidae was reported to be n° =°14 in the literature; so, its reduction to n° =°13 is… More >

Ávila-Rodríguez V¹, CA Vacio-Fraga¹, U Nava-Camberos², C Márquez-Hernández¹, C García de la Peña¹, V Olalde-Portugal³, JL García-Hernández²

Phyton-International Journal of Experimental Botany, Vol.85, pp. 249-255, 2016, DOI:10.32604/phyton.2016.85.249

Abstract Pecan Carya illinoinensis (Wang.) K. Koch is one of the most important crops in northern Mexico. In the Comarca Lagunera, during 2013, the pecan acre age was 7075 ha, a nut production of 8648 ton, and a value of US$ 29.9 million (US$ 4230/ha). The aphids Monellia caryella Fitch., Monelliopsis pecanis Bissell and Melanocallis caryaefoliae Davis (Hemiptera: Aphididae) are among the most important insect pests associated with the pecan. The objectives of this study were to identify the species of aphids, determine their population dynamics and parasitism, in pecan orchards with different insect pest management programs, in the Comarca Lagunera.… More >

Méndez-Trujillo V¹, M Carrillo-Beltrán¹, B Valdez-Salas¹, D Gonzalez-Mendoza²

Phyton-International Journal of Experimental Botany, Vol.85, pp. 225-230, 2016, DOI:10.32604/phyton.2016.85.225

Abstract The aim of the present study was to isolate autochthonous microorganisms with biosurfactants capacities from the rhizospere of the cotton (Gossypium spp.), cachanilla (Pluchea sericea) and salicornia (Salicornia bigelovii) in the Mexicali valley. The biosurfactant activity and biosurfactant productions by the strains isolated from the rhizosphere of the cotton (Bs-Alg), cachanilla (Bs-Cach) and salicornia (Bs-Cach01) were determined using oil spreading technique and emulsification activity with corn, olive, soybean and diesel oils, respectively. The analysis of the 16S rRNA showed that strains Bs-Alg, Bs-Cach and Bs-Cach01 are closely related among them and with respect to all Bacillus subtilis with more than… More >