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Huaiquipán R, Quiñones J, Díaz R, Velásquez C, Sepúlveda G, Velázquez L, Paz EA, Tapia D, Cancino D, Sepúlveda N. Review: Effect of Experimental Diets on the Microbiome of Productive Animals. Microorganisms 2023; 11:2219. [PMID: 37764062 PMCID: PMC10536378 DOI: 10.3390/microorganisms11092219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 07/14/2023] [Accepted: 07/24/2023] [Indexed: 09/29/2023] Open
Abstract
The microorganisms that inhabit the gastrointestinal tract are responsible for multiple chains of reactions that affect their environment and modify the internal metabolism, their study receives the name of microbiome, which has become more relevant in recent years. In the near future, the challenges related to feeding are anticipated to escalate, encompassing the nutritional needs to sustain an overpopulated world. Therefore, it is expected that a better understanding of the interactions between microorganisms within the digestive tract will allow their modulation in order to provide an improvement in the immune system, feed efficiency or the promotion of nutritional characteristics in production animals, among others. In the present study, the main effects of experimental diets in production animals were described, emphasizing the diversity of the bacterial populations found in response to the diets, ordering them between polygastric and monogastric animals, and then describing the experimental diets used and their effect on the microorganisms. It is hoped that this study will help as a first general approach to the study of the role of the microbiome in production animals under different diets.
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Affiliation(s)
- Rodrigo Huaiquipán
- Programa de Doctorado en Ciencias Agroalimentarias y Medioambiente, Facultad de Ciencias Agropecuarias y Medioambiente, Universidad de la Frontera, Temuco 4780000, Chile; (R.H.); (C.V.); (G.S.); (L.V.); (D.T.)
| | - John Quiñones
- Facultad de Ciencias Agropecuarias y Medioambiente, Universidad de la Frontera, Temuco 4780000, Chile; (R.D.); (D.C.)
- Centro de Tecnología e Innovación de la Carne, Universidad de La Frontera, Temuco 4780000, Chile
| | - Rommy Díaz
- Facultad de Ciencias Agropecuarias y Medioambiente, Universidad de la Frontera, Temuco 4780000, Chile; (R.D.); (D.C.)
- Centro de Tecnología e Innovación de la Carne, Universidad de La Frontera, Temuco 4780000, Chile
| | - Carla Velásquez
- Programa de Doctorado en Ciencias Agroalimentarias y Medioambiente, Facultad de Ciencias Agropecuarias y Medioambiente, Universidad de la Frontera, Temuco 4780000, Chile; (R.H.); (C.V.); (G.S.); (L.V.); (D.T.)
| | - Gastón Sepúlveda
- Programa de Doctorado en Ciencias Agroalimentarias y Medioambiente, Facultad de Ciencias Agropecuarias y Medioambiente, Universidad de la Frontera, Temuco 4780000, Chile; (R.H.); (C.V.); (G.S.); (L.V.); (D.T.)
| | - Lidiana Velázquez
- Programa de Doctorado en Ciencias Agroalimentarias y Medioambiente, Facultad de Ciencias Agropecuarias y Medioambiente, Universidad de la Frontera, Temuco 4780000, Chile; (R.H.); (C.V.); (G.S.); (L.V.); (D.T.)
| | - Erwin A. Paz
- UWA Institute of Agriculture, The University of Western Australia, Perth 6009, Australia;
| | - Daniela Tapia
- Programa de Doctorado en Ciencias Agroalimentarias y Medioambiente, Facultad de Ciencias Agropecuarias y Medioambiente, Universidad de la Frontera, Temuco 4780000, Chile; (R.H.); (C.V.); (G.S.); (L.V.); (D.T.)
| | - David Cancino
- Facultad de Ciencias Agropecuarias y Medioambiente, Universidad de la Frontera, Temuco 4780000, Chile; (R.D.); (D.C.)
- Centro de Tecnología e Innovación de la Carne, Universidad de La Frontera, Temuco 4780000, Chile
| | - Néstor Sepúlveda
- Facultad de Ciencias Agropecuarias y Medioambiente, Universidad de la Frontera, Temuco 4780000, Chile; (R.D.); (D.C.)
- Centro de Tecnología e Innovación de la Carne, Universidad de La Frontera, Temuco 4780000, Chile
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Velázquez L, Quiñones J, Inostroza K, Sepúlveda G, Díaz R, Scheuermann E, Domínguez R, Lorenzo JM, Velásquez C, Sepúlveda N. Maqui ( Aristotelia chilensis (Mol.) Stuntz): A Natural Antioxidant to Improve Quality of Meat Patties. Antioxidants (Basel) 2022; 11:antiox11071405. [PMID: 35883896 PMCID: PMC9312050 DOI: 10.3390/antiox11071405] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 06/30/2022] [Accepted: 07/11/2022] [Indexed: 11/16/2022] Open
Abstract
Aristotelia chilensis is an endemic shrub of the South Pacific with high concentrations of bioactive compounds in its leaves and, therefore, it is highly valued. The effect of Aristotelia chilensis leaf powders (maqui leaf powders; Ma) on the quality and shelf life of beef patties during 7 days of storage was investigated. Five beef patties treatments were prepared: (1) Control without antioxidants (CT); (2) Beef patties with synthetic antioxidants plus color (250 mg/kg) (PL); (3) Beef patties with 500 ppm of maqui leaf powders (Ma500); (4) Beef patties with 1000 ppm of maqui leaf powders (Ma1000); and (5) Beef patties with 2000 ppm of maqui leaf powders (Ma2000). The quality of the beef patties was evaluated on day 0 and day 7 of storage by physicochemical analysis (moisture, ash and lipid content, color, pH, fatty acid profile and lipid oxidation) and organoleptic analysis. The addition of maqui leaf powders did not produce changes in the proximate composition of the beef patties. The pH for all treatments showed a range of 5.50−5.75 and significant differences (p < 0.05) were observed at the beginning and end of storage. The pH of the control beef patties increased during storage while the pH of the beef patties with synthetic and natural antioxidants decreased. Redness (a*) was the color indicator that was mostly affected by the inclusion of 1000 ppm and 2000 ppm powders. High lipid oxidation was observed in control samples on the seventh day of storage due to the high percentage of fat used in the formulation and the absence of any antioxidant. However, the Ma500, Ma1000, and Ma2000 treatments presented the lowest lipid oxidation rates (42.05%, 40.29%, and 43.14%, respectively) in comparison with the synthetic antioxidant (52.23%). This lipid inhibition is related to the strong antioxidant activity (29.75 µg/mL IC50 DPPH) of the maqui leaf powder due to its high content of total polyphenols (148.76 mg GAE/g), mainly characterized by having great amounts of hydroxybenzoic acids (82.5 mg GAE/g), flavonoids (7.1 mg QE/g), and hydroxycinnamic acids (3.7 mg CAE/g). Although minimal variations were observed in some individual fatty acids, and despite the trend to decrease MUFA and increase SFA with the maqui leaf powder addition, these differences were minimal and, according to the nutritional indices results, without any influence on the nutritional quality of the beef patties. The organoleptic analysis showed that the addition of maqui leaf powders did not affect the general acceptability of the new formulations. This study reports for the first time the substitution of synthetic antioxidants with Aristotelia chilensis leaves extract. Based on the results, it can be concluded that this ingredient can be used as an alternative for the production of raw meat products with clean labels.
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Affiliation(s)
- Lidiana Velázquez
- Centro de Tecnología e Innovación de la Carne (CTI-Carne), Facultad de Ciencias Agropecuarias y Forestales, Universidad de La Frontera, Temuco 4780000, Chile; (L.V.); (J.Q.); (G.S.); (R.D.); (C.V.)
- Programa de Doctorado en Ciencias Agroalimentarias y Medioambiente, Universidad de La Frontera, Temuco 4780000, Chile
| | - John Quiñones
- Centro de Tecnología e Innovación de la Carne (CTI-Carne), Facultad de Ciencias Agropecuarias y Forestales, Universidad de La Frontera, Temuco 4780000, Chile; (L.V.); (J.Q.); (G.S.); (R.D.); (C.V.)
| | - Karla Inostroza
- Departamento de Ciencias Agropecuarias y Acuícolas, Facultad de Recursos Naturales, Universidad Católica de Temuco, Temuco 4780000, Chile;
| | - Gastón Sepúlveda
- Centro de Tecnología e Innovación de la Carne (CTI-Carne), Facultad de Ciencias Agropecuarias y Forestales, Universidad de La Frontera, Temuco 4780000, Chile; (L.V.); (J.Q.); (G.S.); (R.D.); (C.V.)
- Programa de Doctorado en Ciencias Agroalimentarias y Medioambiente, Universidad de La Frontera, Temuco 4780000, Chile
| | - Rommy Díaz
- Centro de Tecnología e Innovación de la Carne (CTI-Carne), Facultad de Ciencias Agropecuarias y Forestales, Universidad de La Frontera, Temuco 4780000, Chile; (L.V.); (J.Q.); (G.S.); (R.D.); (C.V.)
| | - Erick Scheuermann
- Departamento de Ingeniería Química, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco 4780000, Chile;
| | - Rubén Domínguez
- Centro Tecnológico de la Carne de Galicia, Rúa Galicia No. 4, Parque Tecnológico de Galicia, San Cibrao das Viñas, 32900 Ourense, Spain;
| | - José M. Lorenzo
- Centro Tecnológico de la Carne de Galicia, Rúa Galicia No. 4, Parque Tecnológico de Galicia, San Cibrao das Viñas, 32900 Ourense, Spain;
- Área de Tecnoloxía dos Alimentos, Facultade de Ciencias de Ourense, Universidade de Vigo, 32004 Ourense, Spain
- Correspondence: (J.M.L.); (N.S.)
| | - Carla Velásquez
- Centro de Tecnología e Innovación de la Carne (CTI-Carne), Facultad de Ciencias Agropecuarias y Forestales, Universidad de La Frontera, Temuco 4780000, Chile; (L.V.); (J.Q.); (G.S.); (R.D.); (C.V.)
- Programa de Doctorado en Ciencias Agroalimentarias y Medioambiente, Universidad de La Frontera, Temuco 4780000, Chile
| | - Néstor Sepúlveda
- Centro de Tecnología e Innovación de la Carne (CTI-Carne), Facultad de Ciencias Agropecuarias y Forestales, Universidad de La Frontera, Temuco 4780000, Chile; (L.V.); (J.Q.); (G.S.); (R.D.); (C.V.)
- Correspondence: (J.M.L.); (N.S.)
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Pérez-Beteta J, Molina-García D, Villena M, Rodríguez MJ, Velásquez C, Martino J, Meléndez-Asensio B, Rodríguez de Lope Á, Morcillo R, Sepúlveda JM, Hernández-Laín A, Ramos A, Barcia JA, Lara PC, Albillo D, Revert A, Arana E, Pérez-García VM. Morphologic Features on MR Imaging Classify Multifocal Glioblastomas in Different Prognostic Groups. AJNR Am J Neuroradiol 2019; 40:634-640. [PMID: 30923085 DOI: 10.3174/ajnr.a6019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 02/25/2019] [Indexed: 12/30/2022]
Abstract
BACKGROUND AND PURPOSE Multifocal glioblastomas (ie, glioblastomas with multiple foci, unconnected in postcontrast pretreatment T1-weighted images) represent a challenge in clinical practice due to their poor prognosis. We wished to obtain imaging biomarkers with prognostic value that have not been found previously. MATERIALS AND METHODS A retrospective review of 1155 patients with glioblastomas from 10 local institutions during 2006-2017 provided 97 patients satisfying the inclusion criteria of the study and classified as having multifocal glioblastomas. Tumors were segmented and morphologic features were computed using different methodologies: 1) measured on the largest focus, 2) aggregating the different foci as a whole, and 3) recording the extreme value obtained for each focus. Kaplan-Meier, Cox proportional hazards, correlations, and Harrell concordance indices (c-indices) were used for the statistical analysis. RESULTS Age (P < .001, hazard ratio = 2.11, c-index = 0.705), surgery (P < .001, hazard ratio = 2.04, c-index = 0.712), contrast-enhancing rim width (P < .001, hazard ratio = 2.15, c-index = 0.704), and surface regularity (P = .021, hazard ratio = 1.66, c-index = 0.639) measured on the largest focus were significant independent predictors of survival. Maximum contrast-enhancing rim width (P = .002, hazard ratio = 2.05, c-index = 0.668) and minimal surface regularity (P = .036, hazard ratio = 1.64, c-index = 0.600) were also significant. A multivariate model using age, surgery, and contrast-enhancing rim width measured on the largest foci classified multifocal glioblastomas into groups with different outcomes (P < .001, hazard ratio = 3.00, c-index = 0.853, median survival difference = 10.55 months). Moreover, quartiles with the highest and lowest individual prognostic scores based on the focus with the largest volume and surgery were identified as extreme groups in terms of survival (P < .001, hazard ratio = 18.67, c-index = 0.967). CONCLUSIONS A prognostic model incorporating imaging findings on pretreatment postcontrast T1-weighted MRI classified patients with glioblastoma into different prognostic groups.
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Affiliation(s)
- J Pérez-Beteta
- From the Department of Mathematics (J.P.-B., D.M.-G., V.M.P.-G.), Mathematical Oncology Laboratory, Universidad de Castilla-La Mancha, Ciudad Real, Spain
| | - D Molina-García
- From the Department of Mathematics (J.P.-B., D.M.-G., V.M.P.-G.), Mathematical Oncology Laboratory, Universidad de Castilla-La Mancha, Ciudad Real, Spain
| | | | - M J Rodríguez
- Radiology (M.J.R.), Hospital General de Ciudad Real, Ciudad Real, Spain
| | - C Velásquez
- Department of Neurosurgery (J.M., C.V.), Hospital Universitario Marqués de Valdecilla and Fundación, Instituto de Investigación Marqués de Valdecilla, Santander, Spain
| | - J Martino
- Department of Neurosurgery (J.M., C.V.), Hospital Universitario Marqués de Valdecilla and Fundación, Instituto de Investigación Marqués de Valdecilla, Santander, Spain
| | | | | | - R Morcillo
- Radiology (R.M.), Hospital Virgen de la Salud, Toledo, Spain
| | | | | | - A Ramos
- Radiology (A. Ramos), Hospital Universitario 12 de Octubre, Madrid, Spain
| | - J A Barcia
- Department of Neurosurgery (J.A.B.), Hospital Clínico San Carlos, Madrid, Spain
| | - P C Lara
- Department of Radiation Oncology (P.C.L.), San Roque University Hospital/Universidad Fernando Pessoa Canarias, Gran Canaria, Spain
| | - D Albillo
- Department of Radiology (D.A.), Hospital Universitario de Salamanca, Salamanca, Spain
| | - A Revert
- Department of Radiology (A. Revert), Hospital de Manises, Valencia, Spain
| | - E Arana
- Department of Radiology (E.A.), Fundación Instituto Valenciano de Oncología, Valencia, Spain
| | - V M Pérez-García
- From the Department of Mathematics (J.P.-B., D.M.-G., V.M.P.-G.), Mathematical Oncology Laboratory, Universidad de Castilla-La Mancha, Ciudad Real, Spain
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Barrera A, Tzompantzi F, Campa-Molina J, Casillas JE, Pérez-Hernández R, Ulloa-Godinez S, Velásquez C, Arenas-Alatorre J. Photocatalytic activity of Ag/Al 2O 3-Gd 2O 3 photocatalysts prepared by the sol-gel method in the degradation of 4-chlorophenol. RSC Adv 2018; 8:3108-3119. [PMID: 35541204 PMCID: PMC9077698 DOI: 10.1039/c7ra12665d] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 12/30/2017] [Indexed: 11/23/2022] Open
Abstract
The photocatalytic activity in the degradation of 4-chlorophenol (4-ClPh) in aqueous medium (80 ppm) using 2.0 wt% Ag/Al2O3-Gd2O3 (Ag/Al-Gd-x; where x = 2.0, 5.0, 15.0, 25.0 and 50.0 wt% of Gd2O3) photocatalysts prepared by the sol-gel method was studied under UV light irradiation. The photocatalysts were characterized by N2 physisorption, X-ray diffraction, SEM, HRTEM, UV-Vis, XPS, FTIR and fluorescence spectroscopy. About 67.0% of 4-ClPh was photoconverted after 4 h of UV light irradiation using Ag/γ--Al2O3. When Ag/Al-Gd-x photocatalysts were tested, the 4-ClPh photoconversion was improved and more than 90.0% of 4-ClPh was photoconverted after 3 h of UV light irradiation in the materials containing 15.0 and 25.0 wt% of Gd2O3. Ag/Al-Gd-25 was the material with the highest efficacy to mineralize dissolved organic carbon, mineralizing more than 85.0% after 4 h of UV light irradiation. Silver nanoparticles and micro-particles of irregular pentagonal shape intersected by plane nanobelts of Al2O3-Gd2O3 composite oxide were detected in the Ag/Al-Gd-25 photocatalyst. This material is characterized by a lowest recombination rate of electron-hole pairs. The low recombination rate of photo-induced electron-hole pairs in the Ag/Al-Gd-x photocatalysts with high Gd2O3 contents (≥15.0 wt%) confirmes that the presence of silver nanoparticles and microparticles interacting with Al2O3-Gd2O3 composite oxide entities favors the separation of photo-induced charges (e- and h+). These materials could be appropriate to be used as highly efficient photocatalysts to eliminate high concentrations of 4-ClPh in aqueous medium.
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Affiliation(s)
- A Barrera
- Laboratorio de Nanomateriales Catalíticos, Centro Universitario de la Ciénega, Universidad de Guadalajara, Av. Universidad No. 1115, Col. Linda Vista C.P. 47820 Ocotlán Jalisco México +52 392 92 594 00
| | - F Tzompantzi
- Depto. de Química, Área de Catálisis, Universidad Autónoma Metropolitana - Iztapalapa Av. San Rafael Atlixco 189 C.P. 09340 Cd. de México México
| | - J Campa-Molina
- Laboratorio de Materiales Avanzados, Universidad de Guadalajara Depto. De Electrónica Blvd. Marcelino García Barragán 1422 esq. Calzada Olímpica, Col. Olímpica 44430 Guadalajara Jalisco México
| | - J E Casillas
- Laboratorio de Nanomateriales Catalíticos, Centro Universitario de la Ciénega, Universidad de Guadalajara, Av. Universidad No. 1115, Col. Linda Vista C.P. 47820 Ocotlán Jalisco México +52 392 92 594 00
| | - R Pérez-Hernández
- Laboratorio de Nanocatálisis, Depto. de Tecnología de Materiales, Instituto Nacional de Investigaciones Nucleares Carr. México-Toluca S/N, La Marquesa, Ocoyoacac Edo. De México C.P. 52750 México
| | - S Ulloa-Godinez
- Laboratorio de Materiales Avanzados, Universidad de Guadalajara Depto. De Electrónica Blvd. Marcelino García Barragán 1422 esq. Calzada Olímpica, Col. Olímpica 44430 Guadalajara Jalisco México
| | - C Velásquez
- Centro de Investigación en Nanociencia y Nanotecnología, Centro Universitario de los Valles, Universidad de Guadalajara Ameca Jalisco 46600 México
| | - J Arenas-Alatorre
- Universidad Nacional Autónoma de México, Instituto de Física México D.F. México
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Vera L, Pérez-Beteta J, Molina D, Borrás JM, Benavides M, Barcia JA, Velásquez C, Albillo D, Lara P, Pérez-García VM. P09.62 Towards individualized survival prediction in glioblastoma patients using machine learning methods. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox036.317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Molina D, Pérez-Beteta J, Martínez-González A, Velásquez C, Martino J, Luque B, Revert A, Herruzo I, Arana E, Pérez-García VM. P04.19 Recommendations for computation of textural measures obtained from 3D brain tumor MRIs: A robustness analysis points out the need for standardization. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox036.159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Paredes T, Velásquez C, Sánchez E. Virus sincicial respiratorio: presentación, manejo y prevención de un brote intrahospitalario en una unidad de cuidados intensivos neonatales de Lima. An Fac med 2012. [DOI: 10.15381/anales.v73i1.812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
El virus sincicial respiratorio (VSR) es el principal patógeno causante de infecciones del tracto respiratorio bajo durante el primer año de vida y ocasiona un elevado índice de hospitalización en niños menores de 12 meses; la presentación clínica severa y su aparición como brotes epidemiológicos en las unidades con recién nacidos prematuros representa un riesgo elevado de morbimortalidad. Se realiza la presentación de dos casos y el análisis sobre la importancia del diagnóstico precoz, el manejo individualizado y las medidas de control de infecciones como factores que reducen la morbimortalidad en estas situaciones y previenen la diseminación de los casos en una unidad de cuidados intensivos neonatales (UCIN).
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Massardo T, Lavados H, Jaimovich R, Herrera E, Quevedo L, Alfaro L, Assef V, Coll C, Velásquez C, Pereira ME, Olea E, Quintana JC. [Interobserver correlation in the interpretation of 99mTc-sestamibi SPECT in reperfused acute myocardial infarction]. Rev Esp Med Nucl 2008; 27:83-89. [PMID: 18367045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
INTRODUCTION AND OBJECTIVES The correct interpretation of myocardial perfusion single photon emission computed tomography (SPECT) requires knowledge of the technique reproducibility. The objective was analyze the interobserver correlation of different experience in the interpretation of myocardial perfusion SPECT in patients following acute myocardial infarction (AMI) in order to improve the quality of our site. METHODS Sixty cases (56 +/- 11 years, 87 % men) with transmural AMI who had recently undergone successful thrombolysis were included. Resting perfusion with (99m)Tc-sestamibi was performed at one week post-AMI. ANALYSIS Semiquantitative interpretation using 17 segment-model by 2 independent specialists and 5 observers, was performed blindly. Left ventricular ejection fraction (LVEF) was measured with isotopic ventriculography one month after AMI, with a mean of 38 %. RESULTS Using independent and then agreed on perfusion analysis, average involved segments/patient was 9.3 +/- 4 and the sum of severity 25 +/- 13. Readings of other observers ranged from 7 +/- 3.7 to 9.4 +/- 3.9 and 16.7 +/- 9.7 to 24.6 +/- 13, respectively, consistent with the reading of the specialists of between 0.779-0.871 (kappa: 0.565-0.741). There was no significant difference when the number of segments were analyzed in 40 % of the cases and for intensity in 60 % of them in more experienced observers. Correlation with consensus reading for the number of segments ranged from 0.84 to 0.94 and for severity from 0.79 to 0.89. Identification of culprit arteries was acceptable, with r values between 0.612 and 0.683 and kappas between 0.629 and 0.656. Correlation of the number of involved segments and severity with LVEF performed one month after AMI was 0.73 and 0.74, respectively. CONCLUSIONS There was good correlation in the interpretation of myocardial perfusion SPECT, with a significantly better fit in more experienced observers. This academic exercise was also helpful in improving our residents' skills in cardiology.
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Affiliation(s)
- T Massardo
- Sección de Medicina Nuclear, Departamento de Medicina, Hospital Clínico Universidad de Chile, Chile.
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Huerta-Espino J, Constantinescu O, Velásquez C, Herrera-Foessel SA, Figueroa-Lopez P. First Report of Ramularia cercosporelloides on Carthamus tinctorius in Northwestern Mexico. Plant Dis 2006; 90:1552. [PMID: 30780982 DOI: 10.1094/pd-90-1552b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Severe yield losses caused by an unidentified fungal disease occurred on safflower in Sonora, Mexico from 2001 to 2006. Leaf spots were pale at the beginning and became sunken lesions, spots turned brown, and diseased tissue became necrotic. Under continuous presence of dew, new infections occurred and the number of lesions increased, coalesced, and eventually the entire leaf and plant turned brown and dried up. The fungus appears as a whitish mold covering the lesions. Observations with a dissecting microscope revealed fungal growth on both leaf surfaces. Spots had minute, gray-to-pink tufts emerging from the host tissues. Stromata were roughly spherical, 35 to 55 μm in diameter, developed under the epidermis near the edge of the spots from which conidiophores arose. Fascicles of conidiophores emerged through stomata from colorless or slightly yellowish stroma and were simple, colorless, or slightly yellowish, as much as 85 μm long and 2.5 to 3 μm wide, with a pigmented scar at the tip. Conidia, formed in chains at scar sites on conidiophores, were colorless, obclavate, 0 to 1 septate, approximately 24 to 32 μm long, and 4.5 to 7 μm wide at the broadest part with a pigmented scar either at the base or at both ends. On the basis of symptoms and fungal morphology, the pathogen was identified as Ramularia cercosporelloides U. Braun & Crous (=Cercosporella carthami) (1). Seven specimens were deposited at the Uppsala University Herbarium as Nos. UPS F-119998 to 120004. Conidia were transferred to water agar plates from symptomatic leaves after 8 days in a humid chamber. Ten single conidia were plated onto a Septoria tritici medium (4 g each of malt extract, yeast extract, and sucrose, and 18 g of agar per liter of water). Colonies of the fungus were white-to-light pink with irregular margins and very slow in growth. Inoculum was produced by transferring 2 ml of distilled water containing conidia onto petri plates filled with Septoria medium. Plates were incubated at 18°C for 12 days. Water suspension was amended with two drops of Tween 20 per liter of inoculum. Pathogenicity of five isolates was confirmed by spraying a suspension of 1.0 × 105 conidia/ml onto five pots of four direct-seeded adult plants of cv. S-518 per isolate. Plants were kept in a dew chamber (20°C) for 48 h under 16 h of darkness and 8 h of light and then in a greenhouse (20 to 24°C). After 2 weeks, leaves developed the characteristic spots, and R. cercosporelloides was isolated from symptomatic tissue. To our knowledge, this is the first report of R. cercosporelloides on safflower, not only in Mexico, but also on the American continent. Reference: (1) U. Braun. A monograph of Cercosporella, Ramularia and allied genera (Phytopathogenic Hyphomycetes). Vol 2. IHW-Verlag. Eching bei Munchen, 1998.
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Affiliation(s)
| | - O Constantinescu
- Botanical Section, Museum of Evolution, Uppsala University, Norbyvägen 16, SE-752 36 Uppsala, Sweden
| | - C Velásquez
- International Maize and Wheat Improvement Center (CIMMYT), Apdo. Postal 6-641, 06600 México, D.F., México
| | - S A Herrera-Foessel
- International Maize and Wheat Improvement Center (CIMMYT), Apdo. Postal 6-641, 06600 México, D.F., México
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Salinas G, Velásquez C, Saavedra L, Ramírez E, Angulo H, Tamayo JC, Orellana A, Huivin Z, Valdivia C, Rodríguez W. Prevalence and risk factors for gallstone disease. Surg Laparosc Endosc Percutan Tech 2005; 14:250-3. [PMID: 15492651 DOI: 10.1097/00129689-200410000-00003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Gallstone disease is a main public health problem. The overall prevalence data range from 3.9% in the pre-echographic era to 13.7% when ultrasonography was used as a diagnostic tool. This study is aimed to determine the prevalence of gallstone disease in a medium income level population in Lima, as well as the relationship with some risk factors: age, sex, familiar history and obesity. A total of 534 adult men and women from a medium economic level underwent ultrasonographic examination of abdomen for detection of gallstone disease (July 2003). The echographic evaluation was performed by 10 general surgeons trained in ultrasonography. Likewise, 4 risk factors--age, gender, familial history, and obesity--were analyzed. Pearson chi2 test (2-sided) was used with a probability of <0.05 for statistical significance and logistic regression analyses for assessment of confounding factors. The prevalence founded was 15%. Eighty-one of 534 participants had lithiasis. Compared to the age group under 30, the odds ratio for the 31 to 50 years and >50 years of age group was 0.9 and 1.1, respectively. The female-male ratio was 1.07 and the odds ratio 0.8. The prevalence of gallstone disease in people reporting a first-degree relative with lithiasis was 21%, whereas in participants without such a condition, it was 13%. On the other hand, a familial history was present in 38% of the lithiasis group and in 25% of the nonlithiasis group. The odds ratio for familial history was 1.8 (P = 0.01, 95% confidence interval 1.1-2.9). The prevalence of the disease for body mass index <24, 25 to 29, and higher than 30 was 17%, 14% and 13%, respectively. Compared to the reference group (body mass index <24), the other 2 groups (body mass index 25-29 and >30) both had a similar odds ratio, 0.8. Logistic regression analyses showed an odds ratio of 1.9 for familiar history (95% confidence interval 1.1-3.2), whereas the odds ratio of the overweight (body mass index 25-29) and obese group (body mass index >30) when compared to the normal group, BMI <24, was 0.7 and 0.9, respectively. The prevalence data for gallstone disease remain slightly higher than those previously reported. Although the familiar history was the only characteristic with a statistically significant positive relationship with lithiasis, additional studies are needed because few biases could not be completely avoided and some confounding factors were not controlled.
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Affiliation(s)
- G Salinas
- Endoscopìa Quirùrgica, Surco, Lima, Peru
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11
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Velásquez C, Rojas F, Lara VH, Campero A. On the textural and morphological properties of crystalline and amorphous α-tin phosphate. Phys Chem Chem Phys 2004. [DOI: 10.1039/b403830d] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Briceño JC, Rincón IE, Vélez JF, García A, Castro I, Arias M, Velásquez C, Anzola ML, Matallana M, Isaza CE, Arcos MI. Description of a project for the production and evaluation of oxygen-carrying hemosubstitutes. Artif Cells Blood Substit Immobil Biotechnol 1997; 25:473-9. [PMID: 9285049 DOI: 10.3109/10731199709118937] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Scarce availability and risk of transmission of infections and diseases (HIV, hepatitis B, Chagas' disease) limit the use and benefits of homologous blood transfusions for surgical purposes. Recent trials of perfluorocarbon-based hemosubstitutes (PFC-HSs) in experimental cardiopulmonary bypass (CPB) have demonstrated their ability to improve brain oxygenation, as compared with conventional crystalloid priming solutions. The objective of the project described here is to test different formulations of PFC-HSs and optimize their formulation and dosage for use in CPB. The project includes: (1) study the feasibility of implementing a laboratory for small scale production of PFC-HSs; (2) evaluate the efficacy of use of PFC-HSs in an animal model of CPB; and (3) evaluate the safety of use of PFC-HSs in an animal model of hemorrhagic shock. Several in-house PFC-HSs and outside PFC-HSs are being evaluated. The current state of the project is: (1) the feasibility study has been completed and several PFCs, emulsifiers and surfactants are being tested; (2) and (3) the animal models have been implemented are being used to test in-house and outside PFC-HSs as priming solutions in CPB and reinfusion fluids in hemorrhagic shock respectively. Some preliminary results are presented.
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Affiliation(s)
- J C Briceño
- Fundación Cardio-Infantil, Instituto de Cardiología, University of Los Andes, Bogotá, D.C., Colombia
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Cáceres AG, Galati EA, Le Pont F, Velásquez C. [Phlebotomus fauna (Diptera: Psychodidae) of 3 provinces of the northeastern region of Marañon, Peru]. Rev Soc Bras Med Trop 1995; 28:215-21. [PMID: 7480916 DOI: 10.1590/s0037-86821995000300009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Two thousand seven hundred and seventy four sand flies were captured since 1987 to 1992 in endemic areas of human bartonellosis and Peruvian Verruga (district of San José de Lourdes, province of San Ignacio - 05 degrees 03' LS, and district of Lonya Grande, province of Utcubamba - 06 degrees 05'30" LS) belonging to the Northeast region of Marañon, Peru. Thirteen species were identified, 11 belonging to the genus Lutzomyia, 1 to Brumptomyia and the other to Warileya. Lutzomyia sp, close to L. serrana and L. maranonensis n. sp., Galatti, Cáceres & Le Pont are more prevalent (89.74% of the individuals captured). Suggests working of the kind. Lutzomyia verrucarum (Townsend, 1913) is reported in Utcubamba province for the first time.
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Bezares A, Cuca M, Avila E, Velásquez C. [Broad beans (Vicia fava, L.) as an alternative source of protein in chick diets]. Arch Latinoam Nutr 1980; 30:75-87. [PMID: 7447590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Three experiments were conducted to study the possibility of improving the nutritive value of broad beans (Vicia faba, L.) in poultry diets. In the first experiment, raw and autoclaved (1.0 kg/cm2/15 min) beans, with and without antibiotic supplementation, were studied. The results after 21 days showed no significant differences among treatments in regard to body weight. In feed conversion, however, a significant difference was observed when diets prepared with raw beans were supplemented with 20 ppm of flavomycin. In the second experiment raw and autoclaved beans were supplemented with 0, 10, and 20 ppm of virginiamycin and 200 and 400 ppm of flavomycin to study the effect of these two antibiotics. After 28 days, the results indicated no significant differences with antibiotic supplementation in either raw or autoclaved beans. However, a significant difference (P < 0.05) in body weight was found when beans were autoclaved. In the third experiment, two levels, 31 and 76% of raw and autoclaved beans, were included in the chick diets. The results in body weight, after 28 days, did not show any significant differences between raw and autoclaved beans fed at a 31% level. With the 76% level the autoclaved treatment, however, induced a significantly higher body weight than the diets containing raw beans.
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