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Moctezuma Victor,Hernández Benjamín,Sánchez-Huerta José Luis,Lizardo Viridiana,Quiroz-Rocha Georgina Adriana,Navarrete-Heredia José Luis 한국응용곤충학회 2023 Journal of Asia-Pacific Entomology Vol.26 No.1
Two new species of Onthophagus Latreille, 1802 from the Pacific Slope of Mexico are described and illustrated: Onthophagus gonzaloi Moctezuma, Hernández & Sánchez-Huerta, sp. nov., and Onthophagus yescaensis Moctezuma, Hernández & Sánchez-Huerta, sp. nov. New records for Onthophagus browni Howden & Cartwright, 1963 from the Mexican states of Jalisco (the southernmost locality known to date) and Zacatecas are provided. urn:lsid:zoobank.org:pub:51AA52C6-41BF-4A8B-9BC9-D78600EDB32E.
Valadez-Moctezuma Ernestina,Samah Samir,Mascorro-Gallardo J. Oscar,Reynoso José J. López,Marbán-Mendoza Nahum,Aranda-Osorio Gilberto,Brito-Nájera Guadalupe 한국식물생명공학회 2023 Plant biotechnology reports Vol.17 No.6
Although Agave angustifolia Haw is one of the most cultural and industrial promising species in Mexico, no extensive genomic resources were available. Herein, we explore the transcriptome data set of this species. Total RNA from stem, roots, young and mature leaves was purified and sequenced by NovaSeq6000 system. From the de novo assembly of A. angustifolia, a total of 358,170 transcripts with average length of 1117 bp, N50 of 858 bp, and GC mean content of 43.5% were obtained. About 48.7% of the transcripts had open reading frame (ORF). Hence, 63.4% and 42.7% of the ORFs were annotated using Blastp and Blastx against UniProtKB database, respectively, uncovering the presence of at least 29,273 genes in the A. angustifolia transcriptome. The six pairwise comparisons between plant tissues resulted in the identification of 123,181 differentially expressed transcripts (23,978 were upregulated and 79,203 were downregulated). Several carbohydrate metabolism pathways were significantly enriched from the comparisons between leaves and stems. Thus, genes regulated for the fructan, starch and sucrose biosynthesis were discussed. Furthermore, genes involved in cellulose synthesis were explored being the members of the cellulose synthase genes subfamily were highly expressed in young leaf, while the members of the cellulose synthase-like subfamily were preferentially expressed in mature leaf. Moreover, A. angustifolia transcriptome served for the identification of 30,766 SSR and 21,686 VNTR potential markers. Overall, the transcriptomic data generated in this study provide an invaluable resource to understand the biology of A. angustifolia, offering new insight to understand their physiology and adaptation.
Elisa Leyva,Carlos Montalvo,Socorro Leyva,Edgar Moctezuma 한양대학교 세라믹연구소 2008 Journal of Ceramic Processing Research Vol.9 No.5
The degradation of pyridine, widely used in the synthesis of vitamins, drugs, rubber chemicals, herbicides and pesticides, can be photocatalyzed by semiconductor catalysts. Since zinc oxide promotes faster pyridine photocatalytic oxidation reactions than TiO2, the former appears to be a suitable alternative to TiO2 for water treatment contaminated with pyridine. The photodegradation efficiency was negligible when the photolysis was carried out in the absence of any catalyst. The formation and eventual disappearance of intermediate organic reaction products during the photocatalytic oxidation of pyridine was monitored by a combination of analytical techniques such as UV-Vis, HPLC, TOC and NMR. Based on experimental observations, an alternative mechanism is proposed for the photocatalytic oxidation of pyridine. In addition, the kinetic parameters of the Langmuir-Hinshelwood model that describe the initial reaction rate for the photocatalytic degradation of pyridine over TiO2 and ZnO are presented. The degradation of pyridine, widely used in the synthesis of vitamins, drugs, rubber chemicals, herbicides and pesticides, can be photocatalyzed by semiconductor catalysts. Since zinc oxide promotes faster pyridine photocatalytic oxidation reactions than TiO2, the former appears to be a suitable alternative to TiO2 for water treatment contaminated with pyridine. The photodegradation efficiency was negligible when the photolysis was carried out in the absence of any catalyst. The formation and eventual disappearance of intermediate organic reaction products during the photocatalytic oxidation of pyridine was monitored by a combination of analytical techniques such as UV-Vis, HPLC, TOC and NMR. Based on experimental observations, an alternative mechanism is proposed for the photocatalytic oxidation of pyridine. In addition, the kinetic parameters of the Langmuir-Hinshelwood model that describe the initial reaction rate for the photocatalytic degradation of pyridine over TiO2 and ZnO are presented.
Mario Ramírez-Neria,Hebertt Sira-Ramírez,Rubén Garrido-Moctezuma,Alberto Luviano-Juárez 제어·로봇·시스템학회 2019 International Journal of Control, Automation, and Vol.17 No.1
A flatness based approach is proposed for the linear Active Disturbance Rejection Control (ADRC) stabilizationof a nonlinear inertia wheel pendulum (IWP) around its unstable equilibrium point, subject to unmodelleddynamics and disturbances. The approach exploits the cascade structure, provided by the flatness property, of thetangent linearization of the underactuated system which allows designing a high gain linear cascaded Extended StateObserver (ESO) of the Generalized Proportional Integral (GPI) type. This class of linear observers is employed tobuild an Active Disturbance Rejection Control controller with a lower order of complexity regarding other ADRCclassic schemes. Experimental results demonstrate the effectiveness and feasibility of the proposed approach, aswell as a better behavior with respect to a classic control technique in the presence of disturbances.
Acute cholecystitis in neutropenic patients
Uriel Clemente-Gutierrez,German Esteban Sanchez Morales,Paulina Moctezuma Velazquez,Alexandra Rueda de Leon Aguirr,Jesus Morales Maza,Ismael Dominguez-Rosado,Heriberto Medina-Franco 한국간담췌외과학회 2019 Annals of hepato-biliary-pancreatic surgery Vol.23 No.3
Backgrounds/Aims: The frequency of acute cholecystitis reported in neutropenic patients is between 0.4-1.65%. Clinical manifestations differ from general population as well as clinical approach, diagnosis and treatment. The aim of this work is to describe clinical characteristics, diagnostic approach, and outcomes of patients with hematological diseases that presented with neutropenia and fever associated with acute cholecystitis in a tertiary referral hospital. Methods: We performed a retrospective analysis of patients with diagnosis of neutropenia and fever associated with acute cholecystitis in the period between January 2000 and January 2017. Quantitative variables were analyzed with mean and standard deviation, and qualitative variables with frequency and percentage. Results: During the study period, 2007 patients presented with neutropenia and fever. Twelve of them (0.59%) had associated acute cholecystitis. The most common hematologic disease among these patients was lymphoblastic leukemia. Acute acalculous cholecystitis was diagnosed in 6 cases (50%). Eleven patients (91.6%) had a severe presentation and cholecystostomy was performed in 9 (75%) cases. The main cause of mortality was septic shock (33.3%). Conclusions: Treatment of acute cholecystitis in patients with neutropenia must be individualized. Cholecystostomy should be considered as a bridge therapy for an interval cholecystectomy.
Alida Ospina-Orejarena,Ricardo Vera-Graziano,Maria Monica Castillo-Ortega,Juan Paulo Hinestroza,Mabel Rodriguez-Gonzalez,Laura Palomares-Aguilera,Marissa Morales-Moctezuma,Alfredo Maciel-Cerda 한국조직공학과 재생의학회 2016 조직공학과 재생의학 Vol.13 No.4
Increasing bioactivity and mechanical properties of polymers to produce more suitable scaffold for tissue engineering is a recurrent goal in the development of new biomedical materials. In this study, collagen-functionalized poly (lactic acid), PLA, was obtained by means of a simple grafting route, and electrospun scaffolds were produced to grow cells in vitro; their bioactivity was compared with scaffolds made of physical blends of PLA and collagen. Grafting was verified via nuclear magnetic resonance, attenuated total reflection-Fourier transform infrared and X-ray photoelectron spectroscopy. The cell adhesion performance of the scaffolds was studied using macrophages. Elastic modulus (74.7 megapascals) and tensile strength (3.0 megapascals) of the scaffold made from PLA grafted with collagen were substantially higher than the scaffolds made from physical blends of collagen and PLA: 32 and 2.16 megapascals, respectively, implying a more resistant material because of the chemical bond of the polypeptide to PLA. Besides, the fibers had more uniform diameter without defects. Scaffolds made from PLA grafted with collagen presented four-fold increase in cell adhesion than those of PLA blended with collagen. Furthermore, cell spreading within the scaffolds occurred only when collagen-functionalized poly (lactic acid) was used. These results open a new option for the easy tailoring of nanofiber-based scaffolds in three dimensions for tissue engineering.