Miguel Murguía | Universidad Nacional Autónoma de México (original) (raw)
Papers by Miguel Murguía
Revista Mexicana de Biodiversidad
Las bases de datos florísticos constituyen herramientas clave para enriquecer el conocimiento sob... more Las bases de datos florísticos constituyen herramientas clave para enriquecer el conocimiento sobre la diversidad vegetal de una región. Considerando la información que aportan, se llevó a cabo el registro de las plantas endémicas y características del estado de Guanajuato, dentro de una cuadrícula de 1° × 1° de latitud y longitud, con el objetivo de evaluar sus patrones de riqueza y sus similitudes florísticas. Los registros de presencia de las especies reportadas en la literatura para Guanajuato, se analizaron junto con las bases de datos en el Sistema Nacional de Información sobre Biodiversidad (SNIB), de la Comisión Nacional para el Conocimiento y Uso de la Biodiversidad (Conabio) y la del Instituto de Biología, de la Universidad Nacional Autónoma de México (UNAM). A partir de 29,897 registros únicos, se registraron 3,065 especies de plantas vasculares, distribuidas en 997 géneros, 187 familias y 54 órdenes. De ellas 1,174 especies son endémicas de México y 356 se consideran car...
Contributions to Nephrology, 2018
BACKGROUND High serum uric acid concentration (SUA >6 for women [W] or 7 mg/dL for men [M]) in... more BACKGROUND High serum uric acid concentration (SUA >6 for women [W] or 7 mg/dL for men [M]) in adults is an independent risk factor for causing cardiovascular disease and chronic kidney disease (CKD); the risk of high SUA in young population is still being debated. SUMMARY We conducted an epidemiological study to determine the association between SUA quartiles with cardiometabolic risk factors (CRF) and renal impairment in apparently healthy young adults. CRF (dyslipidemia, overweight [Ow], obesity [Ob], blood pressure [BP], hyperglycemia, insulin resistance [IR]) and renal impairment were defined as glomerular filtration rate (GFR) by CKD-Epidemiology Collaboration formula >130/120, <90 mL/min/1.73 m2, and proteinuria were measured in 18- to 25-year-old students (total n = 5,531). Adjusted ORs by sex were calculated using logistic regression. RESULTS The mean SUA was 4.5 ± 1.04 and 6.2 ± 1.2 mg/dL in W and M respectively. High SUA was found in 13.9% (n = 767); prevalence of Ow/Ob 69% (528 of 767), high BP 9% (67), hyperglycemia 15% (112), IR 47% (214), hypertriglyceridemia 35% (269), high LDL-c 16% (120), low HDL-c 52% (399), and metabolic syndrome 33% (249). Prevalence of high GFR was 13% (103), low GFR 8% (62) and proteinuria 5% (37). All risk factors showed a positive relationship with the SUA quartiles with high LDL-c with lowest risk (OR 1.7) and Ow/Ob with highest risk (OR 4.1), independent of sex. Key Messages: High SUA concentrations (M ≥6.2/W ≥4.5 mg/dL) are associated with CRF and renal impairment in young adults. It is necessary to reevaluate the cutoff points for UA in young adults.
Biodiversity informatics, Feb 1, 2024
The software design process must put users at the core of the process to enable them to meet thei... more The software design process must put users at the core of the process to enable them to meet their specific objectives effectively, efficiently, and successfully. Thus, a software design for a computing system to consult biological collections guided by the concept of usability will result in an effective and efficient biodiversity informatics tool. Here, we introduce IBdata, a web system to consult biological collections, developed using a design approach based on the architecture of three layers: database, business rules, and user interface. The user interface design was guided by the concept of usability focused on four core concepts: simplicity, adaptability, guide the user through the journey, and feedback. The IBdata web system that we developed is composed of three modules (query, capture and editing, and administration), permitting it to query a database with about 1.7 million specimen records. Biodiversity data query systems must be effective and efficient and should meet the user's expectations. Software design methodologies play a central role in achieving these goals, and, in this context, interface design techniques that put the user at the core of development are valuable, as in the development of the IBdata web system.
Archivos Latinoamericanos de Nutrición
Dado que para la población Latinoamericana se cuenta con escasas ecuaciones antropométricas valid... more Dado que para la población Latinoamericana se cuenta con escasas ecuaciones antropométricas validadas para determinar porcentaje de masa grasa (% MG), se diseñaron ecuaciones antropométricas prácticas para calcular el % MG en adultos jóvenes. Se realizaron mediciones antropométricas por técnicas validadas, y se calculó el % MG por densitometría (BodPod) y biompedancia. Se reclutaron 284 voluntarios (18-35 años), de uno y otro sexo. Las ecuaciones se diseñaron por regresión lineal múltiple por el método de todas las regresiones posibles y se validaron por su grado de bondad de ajuste (R2), error estándar de estimación (EEE) y por validación cruzada. En hombres: % MG por densitométría R2 = 0.78, EEE = 3.64 %, p < 0.001; % MG por bioimpedancia R2 = 0.76, EEE = 2.48 %, p < 0.001. En mujeres: % MG por densitométría R2 = 0.98, EEE = 4.02%, p < 0.001; % MG por bioimpedancia R2= 0.99, EEE = 2.37 %, p < 0.001. Las ecuaciones aquí diseñadas presentan sencillez, alta validez y conf...
Current Molecular Medicine
Introduction: Cellular damage by oxidation occurs in numerous chronic diseases, such as obesity, ... more Introduction: Cellular damage by oxidation occurs in numerous chronic diseases, such as obesity, type II diabetes, cardiovascular disease, nonalcoholic fatty liver, etc. The oxidized compound 3-nitrotyrosine is a marker of oxidative stress and protein oxidation damage. Objective: The article aims to assess whether 3-nitrotyrosine levels are higher in young people with obesity than in the same population without obesity. Method: Anthropometry and blood chemistry analyses were performed on 24 young Mexican participants (18-30 years old), categorized into two groups based on their waist circumference: Withobesity (≥ 80 cm women; ≥ 90 cm men) and without-obesity (<80 cm women; <90 cm men). Additionally, 3-nitrotyrosine blood values were quantified by ELISA. Results: Except for HDL-cholesterol, the mean values of lipids increased in women and men with obesity (p<0.05), and 3-nitrotyrosine concentration (nM/μg total protein) was higher by 60% in the group with-obesity compared to...
Environmental Pollutants and Bioavailability
The consumption of commercial bottled water worldwide has increased surprisingly. To ensure that ... more The consumption of commercial bottled water worldwide has increased surprisingly. To ensure that its consumption has no harmful effects on human health, research must be carried out with living organisms. The growth of Nicotiana tabacum plants was analyzed after being irrigated with tap and commercial bottled water. Plants irrigated with commercial bottled water had leaves with chlorosis, smaller number of leaves with a shorter length of stem and leaf, compared to plants irrigated with tap water, and root, stem and leaf showed an increase of reactive oxygen species production with a significant decrease of chlorophylls. Chemical analysis of commercial bottled water showed a low ion concentration, and an acidic pH value (5.5) which is below the minimum of Mexican NOM-127-SSA1-2000 pH value standard (6.5-8.5). The growth, chlorophyll concentration and antioxidant capacity of plants irrigated with bottled water are negatively affected compared to those irrigated with tap water.
Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 2016
Obesity and metabolic syndrome pave the way to type 2 diabetes and cardiovascular disease. Obesit... more Obesity and metabolic syndrome pave the way to type 2 diabetes and cardiovascular disease. Obesity and metabolic syndrome prevalence are high (39% and 13%, respectively) in young Mexican population where feeding habits are one of the main factors leading to these maladies. So, a plausible strategy to address the problem is to suggest young to review and control their feeding habits. We present an internet system to register, self-monitoring, and assess feeding habits for young Mexican to review and control them. This system is organized in eight questionnaires, one of them about food frequencies. Also anthropometrics data such as weight, height, waist and hip circumference are registered to assess and follow-up weight condition, through body mass index, and waist/hip ratio. The user could generate a pdf report that automatically summarizes all the data captured in the questionnaires in two pages. A follow up charts of some parameters are also available for monthly data collection once the user fills the system. More than 2,000 young students have used this system since 2013 and is open universally (www.misalud.abacoac.org) to all young people wanting to self-monitoring her/his feeding habits, and obtaining general health recommendations.
… biogeografía, J. Llorente y …, 2003
Botanical Sciences
Background: The 8th version of the "World Checklist of Vascular Plants" (WCVP) was rece... more Background: The 8th version of the "World Checklist of Vascular Plants" (WCVP) was recently published under the coordination of the Royal Botanic Gardens, Kew. It consists of a list of taxonomic names of species, genera, and families of vascular plants representing the most comprehensive and integrated list available today. Questions: How many accepted species does the WCVP include? Is the quality of the included information acceptable? How has the publication of worldwide species names evolved over time? Does the checklist include the species recorded for Mexico? Studied species: Worldwide species of vascular plants included in the WCVP. Study site: Worldwide and Mexico. Methods: A database was created based on the WCVP to answer the research questions. The number of genera and species by taxonomic status (accepted and synonyms) was quantified, some information quality tests were carried out, and the potential number of undiscovered species in the world was estimated usin...
Revista Mexicana de Biodiversidad
Databases of biological collections contain fundamental information for the study of biodiversity... more Databases of biological collections contain fundamental information for the study of biodiversity, hence the importance of their quality, which includes the data on collectors. For this purpose, a list of the main vascular plant collectors in Mexico was constructed to improve the quality of this information. A total of 3.7 million records of vascular plant specimens collected in Mexico were analyzed from the National System of Biodiversity Information (Sistema Nacional de Información sobre Biodiversidad; SNIB) of the Mexican National Commission for the Knowledge and Use of Biodiversity (Comisión Nacional para el Conocimiento y Uso de la Biodiversidad de México; Conabio) and the database of the National Herbarium of Mexico (Herbario Nacional de México; MEXU) of the Institute of Biology at the National Autonomous University of Mexico (UNAM). A “main collector” was considered anyone with 500 or more unique collection numbers in the database. A total of 610 main collectors were identifi...
International Journal of Environmental Research and Public Health
Although it is common to measure bone lengths for study, methodological errors in data measuremen... more Although it is common to measure bone lengths for study, methodological errors in data measurement and processing often invalidate their clinical and scientific usefulness. This manuscript reviews the validity of several published equations used to determine the maximum height in older adults, since height is an anthropometric parameter widely employed in health sciences. A systematic review of original articles published in the English, Spanish, or Portuguese languages was performed in PubMed, ScienceDirect, EBSCO, Springer Link, and two institutional publisher integrators (UACJ and CONRICYT). The search terms were included in the metasearch engines in a combined way and text form using the Boolean connectors AND and OR {(Determination OR Estimation OR Equation) AND Height AND (Elderly OR “Older adults”)}. Eleven manuscripts were selected from 1935 records identified through database searching after applying the following criteria: (1) original articles that designed and validated ...
Experimental and Therapeutic Medicine, 2019
The oxidation of tyrosine to 3 nitrotyrosine is irre¬versible, and due to this characteristic, 3 ... more The oxidation of tyrosine to 3 nitrotyrosine is irre¬versible, and due to this characteristic, 3 nitrotyrosine is used as a marker for oxidative stress in a range of diverse chronic and degenerative diseases. It has been established that the yeast Debaryomyces hansenii (D. hansenii) can assimilate free 3 nitrotyrosine as unique source of nitrogen, and during saline stress, has a high denitrase activity to detoxify this compound in a reaction that involves the liberation of nitrogen dioxide from 3 nitrotyrosine. However, until now it has not been determined whether D. hansenii can detoxify protein bound 3 nitrotyrosine such as nitrated proteins present in different chronic illnesses. The aim of the present study was to evaluate the denitrase activity of D. hansenii to reduce 3 nitrotyrosine from liver proteins of mice with colitis. Firstly, the levels of reactive oxygen species of liver tissue of colitic and control mice were measured by the reaction with the 2'7' dichloro¬fluorescein diacetate. Denitrase activity of D. hansenii was evaluated by incubating cell extracts of the yeast with protein extracts from livers of mice with colitis. Following incuba¬tion, 3 nitrotyrosine was measured, and to corroborate that denitrase reaction had occurred, the production of nitrites was measured. In samples of liver tissue from mice with colitis, the maximum levels of reactive oxygen species were up to two times higher compared with the control livers. Following the incubation of colitic liver samples with cell extracts of D. hansenii, it was observed that 3 nitrotyrosine decreased to the basal concentration of control liver samples, and that the concentration of nitrites was increased. These results indicate that denitrase of D. hansenii extracts can effectively detoxify 3 nitrotyrosine bound to proteins and that the extracts could be used to decrease protein oxidation damage in chronic degenerative diseases.
Open Journal of Nursing, 2012
Aim: Gastric diseases are a recent trend in morbidity in México. We aimed to identify most freque... more Aim: Gastric diseases are a recent trend in morbidity in México. We aimed to identify most frequent life habits factors as risk for gastritis and colitis occurrence, in a Mexican mestizo population in Chabeklumil, Chiapas. Population: This study was observational, descriptive, transversal and prospective; 346 questionnaires were applied to individuals of both genders from 11 years of age, with low income and socioeconomic status, after they signed the informed consent. An individual file was created by the nurses in Chabeklumil. The predominant gender in the population was female (56.1%), with a distribution of 166 among adulthood (19-59 years of age); among males (43.9%), 133 included adults. Results: We identified the following environmental risk factors to develop gastritis and colitis: long periods of daily fasting > consumption of irritant food and drink > stress, in females; in contrast, males reported alcohol and tobacco consumption > irritant food and drink > long periods of daily fasting > stress. We found statistical differences (P < 0.05) in risk factors between females and males, in drugs and alcohol consumption, fasting, and stress, but not in consumption of irritant foods, nor in colitis and gastritis prevalence. Conclusions: Females are most affected by life habits risk factors for gastritis/colitis, which occurs mainly due to lifestyle and "macho" culture, since women are precluded of a better living standard, they work hard in the field, and start early in the day without consuming a meal, which they eat late in the day once arriving home. People in Chabeklumil eat/drink a lot of irritant food like hot pepper and coffee, which damage the gastrointestinal system leading to gastritis and colitis. Furthermore, men started to consume drugs at early ages, a condition also involved in developing gastritis.
Aim: Gastric diseases are a recent trend in morbidity in México. We aimed to identify most freque... more Aim: Gastric diseases are a recent trend in morbidity in México. We aimed to identify most frequent life habits factors as risk for gastritis and colitis occurrence, in a Mexican mestizo population in Chabeklumil, Chiapas. Population: This study was observational, descriptive, transversal and prospective; 346 questionnaires were applied to individuals of both genders from 11 years of age, with low income and socioeconomic status, after they signed the informed consent. An individual file was created by the nurses in Chabeklumil. The predominant gender in the population was female (56.1%), with a distribution of 166 among adulthood (19-59 years of age); among males (43.9%), 133 included adults. Results: We identified the following environmental risk factors to develop gastritis and colitis: long periods of daily fasting > consumption of irritant food and drink > stress, in females; in contrast, males reported alcohol and tobacco consumption > irritant food and drink > long periods of daily fasting > stress. We found statistical differences (P < 0.05) in risk factors between females and males, in drugs and alcohol consumption, fasting, and stress, but not in consumption of irritant foods, nor in colitis and gastritis prevalence. Conclusions: Females are most affected by life habits risk factors for gastritis/colitis, which occurs mainly due to lifestyle and "macho" culture, since women are precluded of a better living standard, they work hard in the field, and start early in the day without consuming a meal, which they eat late in the day once arriving home. People in Chabeklumil eat/drink a lot of irritant food like hot pepper and coffee, which damage the gastrointestinal system leading to gastritis and colitis. Furthermore, men started to consume drugs at early ages, a condition also involved in developing gastritis.
Revista Panamericana de Salud Pública, May 25, 2017
To understand the prevalence of bullying, by gender and educational level, in Ciudad Juárez, Mexi... more To understand the prevalence of bullying, by gender and educational level, in Ciudad Juárez, Mexico, a city with high rates of violence and migration. This was a cross-sectional, observational study conducted in 2012 - 2014 using a questionnaire known as the Bullying-Mexican. A probabilistic multistage cluster-sampling method obtained a study sample of 2 347 students (10 - 27 years of age) from the 400 000 enrolled in grade 5 - university level at the 611 public schools in Ciudad Juárez. Bullying prevalence and frequency (never, rarely, sometimes, often, every day) were analyzed with descriptive statistics. The statistical differences between males and females was assessed using a chi-square test; associations between frequency and academic level were determined by correspondence analysis and the Spearman Rho correlation. A multinomial logistic regression was performed to analyze whether gender and academic level acted independently in the frequency of bullying. Bullying prevalence ...
Geospatial Health, 2012
The geographical distribution of the metabolic syndrome (MetS) prevalence in young Mexicans (aged... more The geographical distribution of the metabolic syndrome (MetS) prevalence in young Mexicans (aged 17-24 years) was estimated stepwise starting from its prevalence based on the body mass index (BMI) in a study of 3,176 undergraduate students of this age group from Mexico City. To estimate the number of people with MetS by state, we multiplied its prevalence derived from the BMI range found in the Mexico City sample by the BMI proportions (range and state) obtained from the Mexico 2006 national survey on health and nutrition. Finally, to estimate the total number of young people with MetS in Mexico, its prevalence by state was multiplied by the share of young population in each state according to the National Population and Housing Census 2010. Based on these figures, we estimated the national prevalence of MetS at 15.8%, the average BMI at 24.1 (standard deviation = 4.2), and the prevalence of overweight people (BMI ≥25) of that age group at 39.0%. These results imply that 2,588,414 young Mexicans suffered from MetS in 2010. The Yucatan peninsula in the south and the Sonora state in the north showed the highest rates of MetS prevalence. The calculation of the MetS prevalence by BMI range in a sample of the population, and extrapolating it using the BMI proportions by range of the total population, was found to be a useful approach. We conclude that the BMI is a valuable public health tool to estimate MetS prevalence in the whole country, including its geographical distribution.
Revista Mexicana de Biodiversidad
Las bases de datos florísticos constituyen herramientas clave para enriquecer el conocimiento sob... more Las bases de datos florísticos constituyen herramientas clave para enriquecer el conocimiento sobre la diversidad vegetal de una región. Considerando la información que aportan, se llevó a cabo el registro de las plantas endémicas y características del estado de Guanajuato, dentro de una cuadrícula de 1° × 1° de latitud y longitud, con el objetivo de evaluar sus patrones de riqueza y sus similitudes florísticas. Los registros de presencia de las especies reportadas en la literatura para Guanajuato, se analizaron junto con las bases de datos en el Sistema Nacional de Información sobre Biodiversidad (SNIB), de la Comisión Nacional para el Conocimiento y Uso de la Biodiversidad (Conabio) y la del Instituto de Biología, de la Universidad Nacional Autónoma de México (UNAM). A partir de 29,897 registros únicos, se registraron 3,065 especies de plantas vasculares, distribuidas en 997 géneros, 187 familias y 54 órdenes. De ellas 1,174 especies son endémicas de México y 356 se consideran car...
Contributions to Nephrology, 2018
BACKGROUND High serum uric acid concentration (SUA >6 for women [W] or 7 mg/dL for men [M]) in... more BACKGROUND High serum uric acid concentration (SUA >6 for women [W] or 7 mg/dL for men [M]) in adults is an independent risk factor for causing cardiovascular disease and chronic kidney disease (CKD); the risk of high SUA in young population is still being debated. SUMMARY We conducted an epidemiological study to determine the association between SUA quartiles with cardiometabolic risk factors (CRF) and renal impairment in apparently healthy young adults. CRF (dyslipidemia, overweight [Ow], obesity [Ob], blood pressure [BP], hyperglycemia, insulin resistance [IR]) and renal impairment were defined as glomerular filtration rate (GFR) by CKD-Epidemiology Collaboration formula >130/120, <90 mL/min/1.73 m2, and proteinuria were measured in 18- to 25-year-old students (total n = 5,531). Adjusted ORs by sex were calculated using logistic regression. RESULTS The mean SUA was 4.5 ± 1.04 and 6.2 ± 1.2 mg/dL in W and M respectively. High SUA was found in 13.9% (n = 767); prevalence of Ow/Ob 69% (528 of 767), high BP 9% (67), hyperglycemia 15% (112), IR 47% (214), hypertriglyceridemia 35% (269), high LDL-c 16% (120), low HDL-c 52% (399), and metabolic syndrome 33% (249). Prevalence of high GFR was 13% (103), low GFR 8% (62) and proteinuria 5% (37). All risk factors showed a positive relationship with the SUA quartiles with high LDL-c with lowest risk (OR 1.7) and Ow/Ob with highest risk (OR 4.1), independent of sex. Key Messages: High SUA concentrations (M ≥6.2/W ≥4.5 mg/dL) are associated with CRF and renal impairment in young adults. It is necessary to reevaluate the cutoff points for UA in young adults.
Biodiversity informatics, Feb 1, 2024
The software design process must put users at the core of the process to enable them to meet thei... more The software design process must put users at the core of the process to enable them to meet their specific objectives effectively, efficiently, and successfully. Thus, a software design for a computing system to consult biological collections guided by the concept of usability will result in an effective and efficient biodiversity informatics tool. Here, we introduce IBdata, a web system to consult biological collections, developed using a design approach based on the architecture of three layers: database, business rules, and user interface. The user interface design was guided by the concept of usability focused on four core concepts: simplicity, adaptability, guide the user through the journey, and feedback. The IBdata web system that we developed is composed of three modules (query, capture and editing, and administration), permitting it to query a database with about 1.7 million specimen records. Biodiversity data query systems must be effective and efficient and should meet the user's expectations. Software design methodologies play a central role in achieving these goals, and, in this context, interface design techniques that put the user at the core of development are valuable, as in the development of the IBdata web system.
Archivos Latinoamericanos de Nutrición
Dado que para la población Latinoamericana se cuenta con escasas ecuaciones antropométricas valid... more Dado que para la población Latinoamericana se cuenta con escasas ecuaciones antropométricas validadas para determinar porcentaje de masa grasa (% MG), se diseñaron ecuaciones antropométricas prácticas para calcular el % MG en adultos jóvenes. Se realizaron mediciones antropométricas por técnicas validadas, y se calculó el % MG por densitometría (BodPod) y biompedancia. Se reclutaron 284 voluntarios (18-35 años), de uno y otro sexo. Las ecuaciones se diseñaron por regresión lineal múltiple por el método de todas las regresiones posibles y se validaron por su grado de bondad de ajuste (R2), error estándar de estimación (EEE) y por validación cruzada. En hombres: % MG por densitométría R2 = 0.78, EEE = 3.64 %, p < 0.001; % MG por bioimpedancia R2 = 0.76, EEE = 2.48 %, p < 0.001. En mujeres: % MG por densitométría R2 = 0.98, EEE = 4.02%, p < 0.001; % MG por bioimpedancia R2= 0.99, EEE = 2.37 %, p < 0.001. Las ecuaciones aquí diseñadas presentan sencillez, alta validez y conf...
Current Molecular Medicine
Introduction: Cellular damage by oxidation occurs in numerous chronic diseases, such as obesity, ... more Introduction: Cellular damage by oxidation occurs in numerous chronic diseases, such as obesity, type II diabetes, cardiovascular disease, nonalcoholic fatty liver, etc. The oxidized compound 3-nitrotyrosine is a marker of oxidative stress and protein oxidation damage. Objective: The article aims to assess whether 3-nitrotyrosine levels are higher in young people with obesity than in the same population without obesity. Method: Anthropometry and blood chemistry analyses were performed on 24 young Mexican participants (18-30 years old), categorized into two groups based on their waist circumference: Withobesity (≥ 80 cm women; ≥ 90 cm men) and without-obesity (<80 cm women; <90 cm men). Additionally, 3-nitrotyrosine blood values were quantified by ELISA. Results: Except for HDL-cholesterol, the mean values of lipids increased in women and men with obesity (p<0.05), and 3-nitrotyrosine concentration (nM/μg total protein) was higher by 60% in the group with-obesity compared to...
Environmental Pollutants and Bioavailability
The consumption of commercial bottled water worldwide has increased surprisingly. To ensure that ... more The consumption of commercial bottled water worldwide has increased surprisingly. To ensure that its consumption has no harmful effects on human health, research must be carried out with living organisms. The growth of Nicotiana tabacum plants was analyzed after being irrigated with tap and commercial bottled water. Plants irrigated with commercial bottled water had leaves with chlorosis, smaller number of leaves with a shorter length of stem and leaf, compared to plants irrigated with tap water, and root, stem and leaf showed an increase of reactive oxygen species production with a significant decrease of chlorophylls. Chemical analysis of commercial bottled water showed a low ion concentration, and an acidic pH value (5.5) which is below the minimum of Mexican NOM-127-SSA1-2000 pH value standard (6.5-8.5). The growth, chlorophyll concentration and antioxidant capacity of plants irrigated with bottled water are negatively affected compared to those irrigated with tap water.
Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 2016
Obesity and metabolic syndrome pave the way to type 2 diabetes and cardiovascular disease. Obesit... more Obesity and metabolic syndrome pave the way to type 2 diabetes and cardiovascular disease. Obesity and metabolic syndrome prevalence are high (39% and 13%, respectively) in young Mexican population where feeding habits are one of the main factors leading to these maladies. So, a plausible strategy to address the problem is to suggest young to review and control their feeding habits. We present an internet system to register, self-monitoring, and assess feeding habits for young Mexican to review and control them. This system is organized in eight questionnaires, one of them about food frequencies. Also anthropometrics data such as weight, height, waist and hip circumference are registered to assess and follow-up weight condition, through body mass index, and waist/hip ratio. The user could generate a pdf report that automatically summarizes all the data captured in the questionnaires in two pages. A follow up charts of some parameters are also available for monthly data collection once the user fills the system. More than 2,000 young students have used this system since 2013 and is open universally (www.misalud.abacoac.org) to all young people wanting to self-monitoring her/his feeding habits, and obtaining general health recommendations.
… biogeografía, J. Llorente y …, 2003
Botanical Sciences
Background: The 8th version of the "World Checklist of Vascular Plants" (WCVP) was rece... more Background: The 8th version of the "World Checklist of Vascular Plants" (WCVP) was recently published under the coordination of the Royal Botanic Gardens, Kew. It consists of a list of taxonomic names of species, genera, and families of vascular plants representing the most comprehensive and integrated list available today. Questions: How many accepted species does the WCVP include? Is the quality of the included information acceptable? How has the publication of worldwide species names evolved over time? Does the checklist include the species recorded for Mexico? Studied species: Worldwide species of vascular plants included in the WCVP. Study site: Worldwide and Mexico. Methods: A database was created based on the WCVP to answer the research questions. The number of genera and species by taxonomic status (accepted and synonyms) was quantified, some information quality tests were carried out, and the potential number of undiscovered species in the world was estimated usin...
Revista Mexicana de Biodiversidad
Databases of biological collections contain fundamental information for the study of biodiversity... more Databases of biological collections contain fundamental information for the study of biodiversity, hence the importance of their quality, which includes the data on collectors. For this purpose, a list of the main vascular plant collectors in Mexico was constructed to improve the quality of this information. A total of 3.7 million records of vascular plant specimens collected in Mexico were analyzed from the National System of Biodiversity Information (Sistema Nacional de Información sobre Biodiversidad; SNIB) of the Mexican National Commission for the Knowledge and Use of Biodiversity (Comisión Nacional para el Conocimiento y Uso de la Biodiversidad de México; Conabio) and the database of the National Herbarium of Mexico (Herbario Nacional de México; MEXU) of the Institute of Biology at the National Autonomous University of Mexico (UNAM). A “main collector” was considered anyone with 500 or more unique collection numbers in the database. A total of 610 main collectors were identifi...
International Journal of Environmental Research and Public Health
Although it is common to measure bone lengths for study, methodological errors in data measuremen... more Although it is common to measure bone lengths for study, methodological errors in data measurement and processing often invalidate their clinical and scientific usefulness. This manuscript reviews the validity of several published equations used to determine the maximum height in older adults, since height is an anthropometric parameter widely employed in health sciences. A systematic review of original articles published in the English, Spanish, or Portuguese languages was performed in PubMed, ScienceDirect, EBSCO, Springer Link, and two institutional publisher integrators (UACJ and CONRICYT). The search terms were included in the metasearch engines in a combined way and text form using the Boolean connectors AND and OR {(Determination OR Estimation OR Equation) AND Height AND (Elderly OR “Older adults”)}. Eleven manuscripts were selected from 1935 records identified through database searching after applying the following criteria: (1) original articles that designed and validated ...
Experimental and Therapeutic Medicine, 2019
The oxidation of tyrosine to 3 nitrotyrosine is irre¬versible, and due to this characteristic, 3 ... more The oxidation of tyrosine to 3 nitrotyrosine is irre¬versible, and due to this characteristic, 3 nitrotyrosine is used as a marker for oxidative stress in a range of diverse chronic and degenerative diseases. It has been established that the yeast Debaryomyces hansenii (D. hansenii) can assimilate free 3 nitrotyrosine as unique source of nitrogen, and during saline stress, has a high denitrase activity to detoxify this compound in a reaction that involves the liberation of nitrogen dioxide from 3 nitrotyrosine. However, until now it has not been determined whether D. hansenii can detoxify protein bound 3 nitrotyrosine such as nitrated proteins present in different chronic illnesses. The aim of the present study was to evaluate the denitrase activity of D. hansenii to reduce 3 nitrotyrosine from liver proteins of mice with colitis. Firstly, the levels of reactive oxygen species of liver tissue of colitic and control mice were measured by the reaction with the 2'7' dichloro¬fluorescein diacetate. Denitrase activity of D. hansenii was evaluated by incubating cell extracts of the yeast with protein extracts from livers of mice with colitis. Following incuba¬tion, 3 nitrotyrosine was measured, and to corroborate that denitrase reaction had occurred, the production of nitrites was measured. In samples of liver tissue from mice with colitis, the maximum levels of reactive oxygen species were up to two times higher compared with the control livers. Following the incubation of colitic liver samples with cell extracts of D. hansenii, it was observed that 3 nitrotyrosine decreased to the basal concentration of control liver samples, and that the concentration of nitrites was increased. These results indicate that denitrase of D. hansenii extracts can effectively detoxify 3 nitrotyrosine bound to proteins and that the extracts could be used to decrease protein oxidation damage in chronic degenerative diseases.
Open Journal of Nursing, 2012
Aim: Gastric diseases are a recent trend in morbidity in México. We aimed to identify most freque... more Aim: Gastric diseases are a recent trend in morbidity in México. We aimed to identify most frequent life habits factors as risk for gastritis and colitis occurrence, in a Mexican mestizo population in Chabeklumil, Chiapas. Population: This study was observational, descriptive, transversal and prospective; 346 questionnaires were applied to individuals of both genders from 11 years of age, with low income and socioeconomic status, after they signed the informed consent. An individual file was created by the nurses in Chabeklumil. The predominant gender in the population was female (56.1%), with a distribution of 166 among adulthood (19-59 years of age); among males (43.9%), 133 included adults. Results: We identified the following environmental risk factors to develop gastritis and colitis: long periods of daily fasting > consumption of irritant food and drink > stress, in females; in contrast, males reported alcohol and tobacco consumption > irritant food and drink > long periods of daily fasting > stress. We found statistical differences (P < 0.05) in risk factors between females and males, in drugs and alcohol consumption, fasting, and stress, but not in consumption of irritant foods, nor in colitis and gastritis prevalence. Conclusions: Females are most affected by life habits risk factors for gastritis/colitis, which occurs mainly due to lifestyle and "macho" culture, since women are precluded of a better living standard, they work hard in the field, and start early in the day without consuming a meal, which they eat late in the day once arriving home. People in Chabeklumil eat/drink a lot of irritant food like hot pepper and coffee, which damage the gastrointestinal system leading to gastritis and colitis. Furthermore, men started to consume drugs at early ages, a condition also involved in developing gastritis.
Aim: Gastric diseases are a recent trend in morbidity in México. We aimed to identify most freque... more Aim: Gastric diseases are a recent trend in morbidity in México. We aimed to identify most frequent life habits factors as risk for gastritis and colitis occurrence, in a Mexican mestizo population in Chabeklumil, Chiapas. Population: This study was observational, descriptive, transversal and prospective; 346 questionnaires were applied to individuals of both genders from 11 years of age, with low income and socioeconomic status, after they signed the informed consent. An individual file was created by the nurses in Chabeklumil. The predominant gender in the population was female (56.1%), with a distribution of 166 among adulthood (19-59 years of age); among males (43.9%), 133 included adults. Results: We identified the following environmental risk factors to develop gastritis and colitis: long periods of daily fasting > consumption of irritant food and drink > stress, in females; in contrast, males reported alcohol and tobacco consumption > irritant food and drink > long periods of daily fasting > stress. We found statistical differences (P < 0.05) in risk factors between females and males, in drugs and alcohol consumption, fasting, and stress, but not in consumption of irritant foods, nor in colitis and gastritis prevalence. Conclusions: Females are most affected by life habits risk factors for gastritis/colitis, which occurs mainly due to lifestyle and "macho" culture, since women are precluded of a better living standard, they work hard in the field, and start early in the day without consuming a meal, which they eat late in the day once arriving home. People in Chabeklumil eat/drink a lot of irritant food like hot pepper and coffee, which damage the gastrointestinal system leading to gastritis and colitis. Furthermore, men started to consume drugs at early ages, a condition also involved in developing gastritis.
Revista Panamericana de Salud Pública, May 25, 2017
To understand the prevalence of bullying, by gender and educational level, in Ciudad Juárez, Mexi... more To understand the prevalence of bullying, by gender and educational level, in Ciudad Juárez, Mexico, a city with high rates of violence and migration. This was a cross-sectional, observational study conducted in 2012 - 2014 using a questionnaire known as the Bullying-Mexican. A probabilistic multistage cluster-sampling method obtained a study sample of 2 347 students (10 - 27 years of age) from the 400 000 enrolled in grade 5 - university level at the 611 public schools in Ciudad Juárez. Bullying prevalence and frequency (never, rarely, sometimes, often, every day) were analyzed with descriptive statistics. The statistical differences between males and females was assessed using a chi-square test; associations between frequency and academic level were determined by correspondence analysis and the Spearman Rho correlation. A multinomial logistic regression was performed to analyze whether gender and academic level acted independently in the frequency of bullying. Bullying prevalence ...
Geospatial Health, 2012
The geographical distribution of the metabolic syndrome (MetS) prevalence in young Mexicans (aged... more The geographical distribution of the metabolic syndrome (MetS) prevalence in young Mexicans (aged 17-24 years) was estimated stepwise starting from its prevalence based on the body mass index (BMI) in a study of 3,176 undergraduate students of this age group from Mexico City. To estimate the number of people with MetS by state, we multiplied its prevalence derived from the BMI range found in the Mexico City sample by the BMI proportions (range and state) obtained from the Mexico 2006 national survey on health and nutrition. Finally, to estimate the total number of young people with MetS in Mexico, its prevalence by state was multiplied by the share of young population in each state according to the National Population and Housing Census 2010. Based on these figures, we estimated the national prevalence of MetS at 15.8%, the average BMI at 24.1 (standard deviation = 4.2), and the prevalence of overweight people (BMI ≥25) of that age group at 39.0%. These results imply that 2,588,414 young Mexicans suffered from MetS in 2010. The Yucatan peninsula in the south and the Sonora state in the north showed the highest rates of MetS prevalence. The calculation of the MetS prevalence by BMI range in a sample of the population, and extrapolating it using the BMI proportions by range of the total population, was found to be a useful approach. We conclude that the BMI is a valuable public health tool to estimate MetS prevalence in the whole country, including its geographical distribution.