Ignacio Méndez Ramírez

ORCID: 0000-0002-1820-6846
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About
Contact & Profiles
Research Areas
  • Occupational Health and Safety in Workplaces
  • Stress and Burnout Research
  • Accounting and Financial Management
  • Health and Medical Education
  • Botanical Research and Applications
  • Infant Development and Preterm Care
  • Plant tissue culture and regeneration
  • Neonatal and fetal brain pathology
  • Health and Lifestyle Studies
  • Mycotoxins in Agriculture and Food
  • Plant and soil sciences
  • Business, Innovation, and Economy
  • Agricultural and Food Production Studies
  • Innovations in Medical Education
  • Sparse and Compressive Sensing Techniques
  • Developmental and Educational Neuropsychology
  • Business, Education, Mathematics Research
  • Language Development and Disorders
  • Workplace Health and Well-being
  • Chromosomal and Genetic Variations
  • Plant Taxonomy and Phylogenetics
  • Cultural and political discourse analysis
  • Plant Diversity and Evolution
  • Wheat and Barley Genetics and Pathology
  • Environmental and Ecological Studies

Roche (Spain)
2024-2025

Complejo Asistencial Sótero del Río
2022-2023

Universidade de Vigo
2023

Universidad Nacional Autónoma de México
2012-2022

Autonomous University of Tlaxcala
2020

Universidad Alas Peruanas
2019

Universidad de la República
2014-2018

Institute of Applied Mathematics
2008-2016

Instituto Universitario Anglo Español
2016

Institute of Mathematical Sciences
2016

Sparse modeling is a powerful framework for data analysis and processing. Traditionally, encoding in this performed by solving an <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">l</i> <sub xmlns:xlink="http://www.w3.org/1999/xlink">1</sub> -regularized linear regression problem, commonly referred to as Lasso or Basis Pursuit. In work we combine the sparsity-inducing property of at individual feature level, with block-sparsity Group Lasso, where...

10.1109/tsp.2011.2157912 article EN IEEE Transactions on Signal Processing 2011-05-27

1 The clonal cactus Opuntia rastrera shows predominantly sexual reproduction in grasslands (GH) and propagation nopaleras (NH). We assessed the effects of light, herbivory, water availability habitat an offspring came from on survival growth or (i.e. seedlings cladodes), through 3‐ 4‐year common garden short‐term greenhouse experiments. 2 Shading by nurse plants increased seedling field order magnitude, a small additional advantage due to predator protection grasses was observed. Strong...

10.1046/j.1365-2745.1998.00308.x article EN Journal of Ecology 1998-12-01

Wire arc additive manufacturing (WAAM) is renowned for its high deposition rate, enabling the production of large parts. However, process has challenges such as porosity formation, residual stresses, and cracking when aluminum This study focuses on ana-lyzing AA5356 walls manufactured using WAAM with Fronius cold metal transfer system (Wels, Austria). The were machined to obtain specimens tensile testing. used computed tomography test analyze specimens' potential relation strength....

10.3390/ma16072570 article EN Materials 2023-03-23

720 Background: Urothelial cancer (UC) is the tenth most common globally. Standard first-line treatment for metastatic UC (mUC) involves enfotumab-vedotin + pembrolizumab or platinum-based chemotherapies, but some patients are ineligible to standard due significant comorbidities and poor performance status. Atezolizumab, an immune checkpoint inhibitor, has shown activity in clinical trials. This study evaluates real-world effectiveness safety of atezolizumab as a with locally advanced...

10.1200/jco.2025.43.5_suppl.720 article EN Journal of Clinical Oncology 2025-02-10

A thermophilic terephthalate-degrading methanogenic consortium was successfully enriched for 272 days in an anaerobic hybrid reactor, and the microbial structure characterized using terminal RFLPs, clone libraries fluorescence in-situ hybridization with rRNA-targeted oligonucleotide probes. All results suggested that Methanothrix thermophila-related methanogens, Desulfotomaculum-related bacterial populations Gram-positive low-G + C group, OP5-related were key members responsible...

10.1099/mic.0.27193-0 article EN Microbiology 2004-10-01

To describe the methods and analyses of 1999 National Nutrition Survey (NNS-99).The (NNS-99) is a probabilistic survey with nationwide representativity. The NNS-99 included four regions urban rural areas Mexico. last sampling units were households, selected through stratified cluster sampling. study population consisted children under five years age, school-age (6-11 years), women childbearing age (12-49 years). Data collected on anthropometric measurements, hemoglobin levels, morbidity its...

10.1590/s0036-36342003001000012 article EN cc-by-nc-sa Salud Pública de México 2003-01-01

Abstract Rice is an important cereal but it often contaminated with aflatoxins (AFs). The purpose of this study was to identify and quantify AF (B 1 , B 2 G ) in 67 rice samples cultivated Mexico Spain, from imported crops collected 2008 2009. methodology validated, the were concentrated purified immunoaffinity columns quantified by high‐pressure liquid chromatography (HPLC). average total (AFt) Spanish 37.3 μg/kg, range 1.6 1383 most being San Juan de Aznalfarache, Sevilla (AFt = 138.6...

10.1111/1750-3841.12291 article EN Journal of Food Science 2013-11-01

In Mexico, as in other developing countries, micronutrient deficiencies are common infants between 6 and 24 months of age an important public health problem. The objective this study was to determine the prevalence anemia iron, folic acid, zinc Mexican children under 2 years who use care services provided by Institute for Social Security (IMSS).A nationwide survey conducted with a representative sample younger than age, beneficiaries, users IMSS through its regular regimen (located urban...

10.1186/1471-2458-7-345 article EN cc-by BMC Public Health 2007-11-30

In Mexico, maize tortillas are consumed on a daily basis, leading to possible aflatoxin exposure. survey of 396 2-kg samples, taken over four sampling days in 2006 and 2007 from tortilla shops supermarkets Mexico City, levels were quantified by HPLC. the regulatory limit is 12 µg kg⁻¹ total aflatoxins for tortillas. this survey, 17% contained at 3-385 or values below quantification (<LOQ) and, these, 13% >12 87% limit. Average concentrations 56 contaminated samples were: AFB1 (12.1 kg⁻¹);...

10.1080/19393210.2010.533390 article EN Food Additives and Contaminants Part B 2011-02-10

BackgroundThe objective structured clinical examination (OSCE) is a widely used method for assessing competence in health sciences education. Studies using this have shown evidence of validity and reliability. There are no published studies OSCE reliability measurement with generalizability theory (G-theory) Latin America. The aims study were to assess the an medical students G-theory explore its usefulness quality improvement.MethodsAn observational cross-sectional was conducted at National...

10.3402/meo.v21.31650 article EN cc-by-nc Medical Education Online 2016-01-01

Abstract Between 1996 and 1998, 580 litres of milk in Mexico were surveyed for aflatoxin B1 (AFB1) its metabolite aflatoxicol (AFL), which are mutagenic carcinogenic mycotoxins that interconvert AFB1–AFL–AFB1. The seven most consumed brands from different regions included pasteurized ultrapasteurized with four fat levels: whole (28–33 g l−1), half-skimmed (10–20 light (1–4 l−1) vegetable oil (33 l−1). Aflatoxins each sample concentrated total immunoaffinity columns quantitated by...

10.1080/02652030310001594478 article EN Food Additives & Contaminants 2003-11-01

Abstract Flow cytometric analysis of DNA content was performed using nuclei isolated from internal basal parts young leaves in 8 varieties Agave tequilana. The distributions nuclear showed that more than 85% leaf were G0/G1 phase the cell cycle. Nuclei with higher 4C not detected, indicating absence endopolyploidy. A. tequilana lineño, azul listado, azul, moraleño, xiguin, and pata de mula found to be diploid (2n =2x=60). These displayed a 2.5% variation 2C content, which ranged 8.304 pg for...

10.1080/00087114.2003.10589305 article EN Caryologia 2003-01-01

Aflatoxins (AF) are toxic fungal secondary metabolites and known mycotoxins pathological to animals humans. Poultry litter is frequently used as a food supplement for ruminants, when poultry feed contains AF, the becomes contaminated well, thus having an effect on livestock health. This study identified quantified AF (AFB(1), AFB(2), AFG(1), AFG(2)) from their recovery, together with (AFM(1), AFM(2), AFP(1), aflatoxicol) in litter. An experiment 25 Hy-Line W-36 hens, second production stage,...

10.3382/ps.2009-00019 article EN cc-by-nc-nd Poultry Science 2010-04-07

The performance of electrical networks is monitored by expensive Phasor Measurement Units (PMUs). It economically beneficial to determine the optimal placement and minimum number PMUs required effectively monitor an entire network. This problem has a graph theory model involving power dominating sets in graph. A set S vertices called if every vertex edge "observed" according observation rules. domination cardinality In this paper, determined for hypercubes Q <sub...

10.1109/cse.2011.89 article EN 2011-08-01

Abstract Ecological restoration of disturbed areas requires substantial knowledge the germination native plants and creation novel methods to increase seedling establishment in field. We studied effects soil matrix priming on Dodonaea viscosa seeds, which exhibit physical dormancy. To this end, we buried both pre‐scarified (in H 2 SO 4 , 3 min) non‐pre‐scarified seeds Parque Ecológico de la Ciudad México. After were unearthed, they post‐scarified for 0, 2, 6 10 min their percentages compared...

10.1111/plb.12110 article EN Plant Biology 2013-10-22

Aflatoxins (AF) are toxic fungal secondary metabolites that pathological to animals and humans. This study identified quantified AF (AFB1, AFB2, AFG1, AFG2) their hydroxylated (AFM1, AFM2, AFP1) aflatoxicol (AFL) from laying hen breast muscles. pass cereal feed the tissues, causing economic losses, there To detect passage of muscle an experiment included 25 Hy-Line W36 121-wk-old hens was performed for 8 d. Hens in individual cages were distributed into 3 groups: a control group, with free...

10.3382/ps.2014-04240 article EN cc-by-nc-nd Poultry Science 2014-10-29
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