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Tuberculosis in Mexico and the USA, Comparison of Trends Over Time 1990–2010
Eduardo Hernández-Garduño,Fabiola Mendoza-Damián,Salvador Ayón-Garibaldo,Adriana Garduño-Alanís 대한결핵및호흡기학회 2015 Tuberculosis and Respiratory Diseases Vol.78 No.3
Background: The aim was to compare tuberculosis trends in Mexico and United States and to evaluate Mexican diagnostic methods and contact investigation. Methods: Retrospective comparative study of tuberculosis cases and incidence rates between both countries (1990–2010). Diagnostic methods and contact investigations were also evaluated for Mexico. Estimates were obtained from official websites. Results: In Mexico, no clear trend was found over time for cases. Pulmonary (PTB) and all forms of tuberculosis (AFTB) incidence decreased 2.0% annually. There was a negative correlation between the mean contacts examined per case and AFTB incidence (r2=–0.44, p=0.01) with a 33% reduction in AFTB incidence. In United States, PTB and AFTB cases have been decreasing 6.0% and 5.6% annually, respectively. The incidence decreased 7.3% and 6.8%, respectively. Conclusion: The incidence of tuberculosis in Mexico is decreasing slightly over time at 2% annually. In the United States, cases and incidence rates have been decreasing at a higher rate (5% to 7% annually). The inverse association between number of contacts examined per state and incidence rates in Mexico underscore the importance of reinforcing and improving contact investigations with the likely translation of a decrease of TB incidence at a higher rate.
Hernández-Silva Gabriela,López-Torres Aideé S.,Maldonado-Rosas Israel,Mata-Martínez Esperanza,Larrea Fernando,Torres-Flores Víctor,Treviño Claudia L.,Chirinos Mayel 대한남성과학회 2021 The World Journal of Men's Health Vol.39 No.4
Purpose: Andrology research has evolved notoriously in the latest years, particularly since male factor contribution to couple infertility has been undoubtedly demonstrated. However, sperm function investigations results are sometimes contradictory, probably as a result of the use of different sperm processing techniques. In this work, we underwent a systematic functional comparison of human sperm samples simultaneously processed by swim-up and density gradient centrifugation, which are the preferred sperm processing methods used in basic and clinical laboratories. Materials and Methods: To compare functional characteristics of sperm isolated by swim-up and density gradient centrifugation followed by incubation at different times under capacitating conditions. Results: Semen samples processed in parallel by these two procedures resulted in sperm preparations with significant differences in redox state, spontaneous intracellular calcium oscillations, hyperactivation, protein tyrosine phosphorylation, and acrosome reaction responsivity to calcium ionophore. Such differences showed time-dependent specific patterns for spontaneous intracellular calcium oscillations, hyperactivation and protein tyrosine phosphorylation. Sperm retrieved by density gradient centrifugation showed more hyperactivation and tyrosine phosphorylation than swim-up sperm, suggesting a higher degree of capacitation. Conclusions: Our results account for functional differences observed in spermatozoa processed with these two methods and therefore may contribute to a better interpretation of outcomes obtained in different laboratories as well as to improve experimental designs aimed to study sperm physiology and fertility potential.
Mixtures of Cellulose Fibers from Pineapple Leaves, Ionic Liquid, and Alkanolamines for CO2 Capture
María Fernanda Agudelo Hernández,Marisol Fernández Rojas,Franciele Bernard,Sandra Einloft,Luz Angela Carreño Diaz 한국섬유공학회 2020 Fibers and polymers Vol.21 No.12
Researchers around the world are looking for ways to improve or develop new technologies to mitigate theemissions of CO2 present in greenhouse gases. Amines are currently the most used substances to capture CO2. The ionicliquids (ILs), however, have also been considered promising materials. Recently, mixtures of ILs and amines have beenstudied for this purpose. The ILs are also being supported in solid matrices (polymers, zeolites, cellulose, and membranes) toobtain stable, easy to handle, and reusable materials. Cellulose fibers make a promising matrix, considering their affinity withCO2, renewable feature, and thermal, mechanical, and chemical stability. To improve the CO2 capture capacity by usingcellulose and the mixture of ILs and amines, we prepared mixtures of the ionic liquid 1-butyl-3-methylimidazoliumtetrafluoroborate [BMIM][BF4] and monoethanolamine or triethanolamine. Then, we dropped the mixtures on naturalcellulose fibers from pineapple leaves. This paper reports the characterization of the composite materials by FTIR, XRD,XPS, FESEM, and TGA-FTIR in order to evaluate their structure, composition, morphology, and thermal behavior. We alsoreport the CO2 sorption capacity at 25 °C and 25 bar as determined by the pressure-decay technique as well as the CO2selectivity using a CO2/CH4 mixture. We found that the fiber with an alkaline treatment containing 35 % of IL and 35 % ofTEA captures the highest amount of CO2 (141 mg of CO2/g of fiber) and that the mixture TEA/IL is more selective for CO2.
Carrasco-García Apolo A.,Pardío-Sedas Violeta T.,León-Banda Gloria G.,Ahuja-Aguirre Concepción,Paredes-Ramos Pedro,Hernández-Cruz Bertha C.,Murillo Vicente Vega 아세아·태평양축산학회 2020 Animal Bioscience Vol.33 No.10
Objective: This study aimed to determine the effects of stress during slaughter of beef cattle on physiological parameters, carcass, and meat quality at a Federal Inspection Type slaughterhouse located in the southeast of Mexico. Methods: A total of 448 carcasses of male Zebu×European steers with an average age of 36 months were included. Carcass assessment of presence of bruises and bruise characteristics was carried out on each half-carcass. Blood variable indicators of stress (packed cell volume, neutrophil to lymphocyte ratio, glucose, cortisol concentration) and meat quality parameters (pH, color, shear force, drip loss) were evaluated. Results: Of the 448 carcasses evaluated, 81% of the carcasses showed at least one bruise; one bruise was detected in 36.6% and two bruises in 27.0% of animals. Of the 775 bruises found, 69.2% of the bruises were grade 1 in region 3. Of the 448 carcasses studied, 69.6% showed hyperglycemia (6.91 mmol/L); 44.3% and 22.7% showed high (74.7 ng/mL) and extremely high (108.8 ng/mL) cortisol levels, respectively, indicative of inadequate handling of animals during preslaughter and slaughter. Of the carcasses evaluated, 90.4% had a pH ≥5.8 with an average of pH 6.3. In both pH groups, meat samples showed L* values >37.0 (81.6%) and a shear force >54.3 N; meat pH≥5.8 group showed a drip loss of 2.5%. These findings were indicative of dark, firm, and dry (DFD) meat. According to principal component analysis, grades 1 and 2 bruises in region 3 and grade 1 bruises in region 5 were highly associated with cortisol, drip loss, and color parameters b* and h* and were negatively associated with L*, a*, and C*. Conclusion: The bruises probably caused by stress-inducing situations triggered DFD meat. Appropriate changes in handling routines in operating conditions should be made to minimize stress to animals during the slaughter process to improve animal welfare and meat quality.
Regions of the human renal artery: histomorphometric analysis
Blanca Mompeó-Corredera,Pablo Hernández-Morera,Irene Castaño-González,María del Pino Quintana-Montesdeoca,Natalia Mederos-Real 대한해부학회 2022 Anatomy & Cell Biology Vol.55 No.3
The renal artery is frequently involved in the pathogenesis of vasculorenal diseases, and it is a target in kidney surgery and therapeutic techniques for refractory hypertension. However, few detailed structural studies on the human renal artery have been conducted. Using histocytochemistry, immunohistochemistry, and quantitative image analysis, the wall thickness, structure, smooth muscle cells, extracellular matrix, and proportion of elastic tissue in the tunica media of main human renal arteries were used estimated. Ninety-six tissue samples were collected from sections of the right and left main renal arteries. The results showed that the renal artery changed from an elastic vessel in its proximal segment to a muscular artery in its distal part. A critical characteristic of the renal artery was the presence of longitudinal smooth muscle cell formations in the tunica adventitia of middle and distal segments but not in the proximal part of the artery. In addition, the tunica adventitia of the renal artery showed a rich vascularization and the presence of numerous nerves profiles. The artery's regional structural and morphometric features explain that a particular arterial pathology is more frequent in a specific vessel sector than in others. In addition, those characteristics could determine a different therapeutic response attending to the arterial sector.
Miguel Fdo. Salazar,María del Rocío Estrada Hernández,Erick Gómez Apo,Laura G. Chávez Macías,Carlos Alfonso Rodríguez Álvarez 대한병리학회 2015 Journal of Pathology and Translational Medicine Vol.49 No.5
We report a unique case of a 4-year-old girl with an intriguing fibrohistiocytic tumour. Magnetic resonance imaging scans showed a dural mass of variegated intensity compressing the left occipital pole and apparently extending toward the superior sagittal sinus. Grossly, the cut surface of the surgical specimen was yellow, pale, and soft with reddish kernel-like crusts. Histologically, the yellow areas resembled cholesterol granulomas with widespread coagulative necrosis, cholesterol clefts, powdery calcification, foreign body-type giant cells, and foamy macrophages, while the scattered red spots contained numerous multinucleated giant cells of foreign-body and Touton types, the former with amphophilic to slightly eosinophilic cytoplasm. Immunoperoxidase reactions confirmed the expression of histiocytic markers and vimentin. As far as we know, no tumour displaying these peculiar morphological features has yet been described.
Romero-Garay Martha Guillermina,Martínez-Montaño Emmanuel,Hernández-Mendoza Adrián,Vallejo-Cordoba Belinda,González-Córdova Aarón Fernando,Montalvo-González Efigenia,García-Magaña María de Lourdes 한국응용생명화학회 2020 Applied Biological Chemistry (Appl Biol Chem) Vol.63 No.4
In the present study, we evaluated new sources of plant proteases from fruits of Bromelia karatas (BK) and Bromelia pinguin (BP) to obtain antioxidant hydrolyzates/bioactive peptides (BPs) derived from chicken by-products (CH) and fish by-products (FH). The profile of the peptides was identified by reverse-phase high-resolution liquid chromatography (RP-HPLC) and the size weight distribution by molecular exclusion chromatography (SEC). The hydrolysates obtained with BK in both sources of by-products showed greater antioxidant capacity compared to those obtained with BP, presenting similar or higher values when compared to a commercial plant enzyme. The use of new sources of plant proteases allowed to obtain hydrolysates of hydrophilic character with a high percentage (> 50%) of peptides with molecular weights < 17.5 kDa from chicken and fish by-products. Therefore, based on the results obtained in antioxidant capacity it is possible to consider the hydrolysates as potential ingredients, food additives, and pharmaceutical products.
Sorption of BTEX on a nanoporous composite of SBA-15 and a calcined hydrotalcite
Sampieri Alvaro,Pérez-Osorio Gabriela,Hernández-Espinosa Miguel Ángel,Ruiz-López Irving Israel,Ruiz-Reyes Mayra,Arriola-Morales Janette,Narváez-Fernández Rocío Iliana 나노기술연구협의회 2018 Nano Convergence Vol.5 No.21
Benzene, toluene, ethylbenzene, and p-xylene (BTEX) are hazardous volatile organic compounds mostly released from fuel combustion, paint gas emissions, and biomass burning. In this work, it is studied the BTEX sorption influence on the surface reactivity of a new kind of nanoporous composite, prepared via an in situ functionalization of SBA-15 with a Mg–Al calcined hydrotalcite (HTC). During its preparation, Mg/Al mixed oxides are indeed formed and dispersed on the SBA-15 surface with non-blockage porosity. Furthermore, the physicochemical surface properties are exalted from its precursors and it is synergistically favorable for the BTEX sorption at low pressure and temperature.
Ale Ismael González-Casarez1,Santamaría-Montaño Germán Gerardo,Plancarte-Sánchez Ricardo,Guillén-Núñez María Rocío,Juárez-Lemus Ángel Manuel,Hernández-Porras Berenice Carolina,Samano-García Marcela,Ro 대한마취통증의학회 2023 Anesthesia and pain medicine Vol.18 No.2
Background: The Gasserian ganglion is a well-known target for facial pain management, and patients with cancer present an anatomical challenge owing to tumor progression or treatment itself. Computed tomography (CT) is an alternative method for guiding these procedures.Methods: This was an observational retrospective analysis of patients with cancer-related facial pain who underwent CT-guided Gasserian ganglion interventions using local anesthetics, local anesthetics with steroids, phenol, and radiofrequency. Demographic, clinical, and procedure-related variables were collected from January 1, 2015, to December 30, 2018, at the National Cancer Institute. Data distribution was determined using the Kolmogorov–Smirnov test. A paired sample t-test (with a cut-off of P < 0.05 for statistical significance) was used for comparing outcome.Results: We observed a significant reduction in numerical rating scale (NRS) and douleur neuropathique 4 (DN4) scores from 7.6 ± 1.4 and 4.4 ± 1.4 to 3.2 ± 2.0 and 2.2 ± 1.4 points, respectively (P < 0.001). After the procedure, 70.8% of the patients were satisfied; 16.7% were very satisfied, and 12.5% were unsatisfied. No intra- or postoperative complications were observed. The most common neoplasms were head and neck tumors (83.3%).Conclusions: Our data suggest that CT guidance is an effective and safe option for managing cancer-related facial pain in patients with complex anatomy, resulting in a significant reduction in pain, high satisfaction rates, and no mechanical complications. Future research should aim to refine the role of CT guidance in multimodal pain management in this population.