1
artículo
Publicado 2020
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This work presents a numerical and experimental study to measure local combustion temperature from the combustion reactive zone in an industrial sugarcane. A bagasse boiler furnace is utilized preliminary step towards obtaining online three-dimensional temperature measurements. Two different methods were used for in situ measurement of local temperatures in a sugarcane bagasse flame: Spectral Analysis and Image Processing in the Visible Spectrum. The maximum instantaneous temperatures found in the focused reactive zone area of the bagasse flame were 1623 K and 1520 K by the spectrometric and imaging system respectively and the time average maximum flame temperatures measured were 1443 K and 1496 K. Additionally, a set of flame temperature measurement tests was carried out in a laboratory furnace by the spectrometric method and a time average flame temperature of 1569 K was noted. The fla...
2
artículo
Publicado 2023
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Intradural-intramedullary intervertebral disc extrusion (IIVDE) is a subtype of herniation of the hydrated nucleus pulposus and occurs after extreme exercise or traumatic events. IIVDE is a rare condition, and its diagnosis can be complex since its clinical characteristics and images are poorly characterized. The case of a six-month-old Schnauzer who suffered a fall from a height of two stories is reported. The patient developed spastic tetraplegia and was diagnosed as a fourth-degree acute cervical spinal cord injury. The radiographic and computed tomography studies only reported a simple fracture in the vertebral body of C3. The magnetic resonance study reported intramedullary linear tracts, parenchymal lesions and reduced disc volume in C3-C4. The clinical condition and its evolution, as well as the imaging findings were compatible with IIVDE.
3
artículo
Publicado 2017
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Haemangiosarcoma is a malignant tumour of vascular origin and it is the most frequent of cardiac tumours in dogs. It is presented the case of a 8-year old Rottweiler dog with dyspnea, pale mucous and intolerance to exercise. Cardiac sounds were slightly perceptible with decreased femoral pulse. Lab tests showed thrombocytopenia, and acute kidney failure. Radiographic and echography tests were carried out identifying only pericardial effusion and cardiac obstruction. Pericardiocentesis was performed which cytology study was compatible with bloodstained serum exudate. A computerized axial tomography in thorax only detected enlargement of the right atrium. A right lateral thoracotomy was performed, identifying a neoplastic mass in the right atrium and several metastatic nodules in lungs and pericardium. The histopathological study diagnosed a primary cardiac hemangiosarcoma in the right atr...
4
artículo
Publicado 2020
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The case of a 9-year-old Schnauzer male canine with a history of lack of appetite, lethargy and exercise intolerance is reported. Echocardiography was performed identifying pericardial effusion and a neoplastic mass in the pericardium. The patient presented cardiac tamponade, which was treated with pericardiocentesis. Once the patient was stabilized, a subphrenic partial pericardiectomy was performed, removing the neoplastic mass. The histopathological diagnosis was pleomorphic pericardial rhabdomyosarcoma. The patient had a survival time of 10 weeks. For the present case, the surgical management provided sustained clinical improvement and contributed to the diagnostic process.
5
artículo
Publicado 2020
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The aim of this study was to determine the concordance between the clinical and tomographic diagnosis in dogs with brain and spine illnesses. An analytical retrospective observational study was carried out, evaluating 196 clinical histories and tomographic reports of veterinary clinics in Metropolitan Lima during the period 2009-2015. This included 76 brain and 120 spinal tomography scans. Of the total of patients, 113 were males (58%) and 83 females (42%) and 120 cases (61.2%) corresponded to purebreds. The main diseases diagnosed clinically and by computed tomography (CT) were thoracolumbar hernia, canine epilepsy, hydrocephalus, and cervical hernia. The clinical diagnosis was related to the presence of a pathology diagnosed by CT using the kappa index and the concordance was classified as poor (k = 0.38). It is concluded that the presumptive clinical diagnosis and CT have very low con...
6
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An 8-month-old male American Bully dog was brought to the clinic for an abnormal structure in the ventral region on the left side of the jaw. On palpation, enlargement of the left mandibular ramus was identified, with pain when opening the mouth. In blood biochemistry, alkaline phosphatase and serum phosphorus increased considerably. X-rays identified a marked proliferation of the periosteum with soft tissue invasion in the mandible. Computed tomography ruled out temporomandibular disorders. Treatment with non-steroidal anti-inflammatory drugs was administered orally, allowing the patient to eat without discomfort two weeks after the start of treatment. The clinical, imaging and histopathology evidence was compatible with a case of craniomandibular osteopathy in a non-predisposed breed.
7
artículo
Publicado 2023
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The aim of the present study was to evaluate the productive performance of commercial laying hens supplemented with four commercial sources of inorganic phosphates for four weeks. In total, 960 Hy-Line Brown hens of 56 weeks of age were distributed in 4 treatments with 6 repetitions each and 40 hens per repetition. The treatments were: T1, Diet with dicalcium phosphate (DCP)-Peru; T2, Diet with DCP-China; T3, Diet with mono-dicalcium phosphate (MDCP)-Peru; and T4, Diet with mono-calcium phosphate (MCP)-China. The diets were formulated to contain 0.36% available phosphorus and the other nutrients according to the nutritional specifications of the genetic line. The percentage of egg production, egg mass, feed consumption and feed conversion were recorded. Also, egg weight, eggshell percentage, yolk and albumen percentage, eggshell thickness, specific gravity, eggshell colour, yolk colour a...
8
artículo
Publicado 2017
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El hemangiosarcoma es un tumor maligno de origen vascular y es el más frecuente de los tumores cardiacos de los canes. Se presenta el caso de un perro de raza Rottweiler de ocho años de edad, que presentó disnea, mucosas pálidas e intolerancia al ejercicio. A la auscultación cardiaca, los sonidos fueron levemente audibles y el pulso femoral disminuido. Los exámenes de laboratorio evidenciaron trombocitopenia e insuficiencia renal aguda. Se realizaron radiografías y ecografías, diagnosticándose hidropericardio y taponamiento cardiaco. Se realizó una pericardiocentesis, cuyo estudio citológico fue compatible con exudado serosanguinolento. La tomografía axial computarizada del tórax solo identificó aumento de tamaño de la aurícula derecha. Se realizó una toracotomía lateral derecha, identificándose una masa de tipo neoplásica en la aurícula derecha, así como nódulos m...
9
artículo
Publicado 2020
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The case of a 9-year-old Schnauzer male canine with a history of lack of appetite, lethargy and exercise intolerance is reported. Echocardiography was performed identifying pericardial effusion and a neoplastic mass in the pericardium. The patient presented cardiac tamponade, which was treated with pericardiocentesis. Once the patient was stabilized, a subphrenic partial pericardiectomy was performed, removing the neoplastic mass. The histopathological diagnosis was pleomorphic pericardial rhabdomyosarcoma. The patient had a survival time of 10 weeks. For the present case, the surgical management provided sustained clinical improvement and contributed to the diagnostic process.
10
artículo
Publicado 2020
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The aim of this study was to determine the concordance between the clinical and tomographic diagnosis in dogs with brain and spine illnesses. An analytical retrospective observational study was carried out, evaluating 196 clinical histories and tomographic reports of veterinary clinics in Metropolitan Lima during the period 2009-2015. This included 76 brain and 120 spinal tomography scans. Of the total of patients, 113 were males (58%) and 83 females (42%) and 120 cases (61.2%) corresponded to purebreds. The main diseases diagnosed clinically and by computed tomography (CT) were thoracolumbar hernia, canine epilepsy, hydrocephalus, and cervical hernia. The clinical diagnosis was related to the presence of a pathology diagnosed by CT using the kappa index and the concordance was classified as poor (k = 0.38). It is concluded that the presumptive clinical diagnosis and CT have very low con...
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12
artículo
Publicado 2018
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The objective of this study was to characterize spine injuries in dogs by computed tomography. The tomographic diagnoses were related to the demographic characteristics of dogs under study (sex, size, breed, and age). A total of 79 tomographic diagnoses were evaluated between June 2010 and July 2014. The results showed a greater frequency of lesions in males of defined breed, medium size and in the age group of 4-7 years. Twentytwo tomographic diagnoses were obtained, the most frequent being medial disc herniation (32.8%, 26/79) and laminar calcification of the dural sac (11.4%, 9/79). A total of 115 lesions were identified in the spine, the lower spine being more affected (48.7%, 56/115). At the level of the intervertebral spaces, the thoracic region T12-T13 presented the largest number of lesions (14%, 16/115), especially discopathies.
13
artículo
Publicado 2019
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The aim of this study was to determine encephalic lesions by computed tomography (CT scan) in 71 dogs that were submitted to the encephalic study by medical recommendation between 2011 and 2015 in Lima, Peru. The tomographic diagnoses were related to the sex, age, size and breed of the patients. Thirty-eight positive tomographic diagnoses of brain injury were identified (53.5%). The most frequent positive age group to brain injury was between 1 and 7 years and in medium-size dogs. The most frequent diagnosed lesions were ventricular dilation (29%, 11/38), brain neoformations (15.8%, 6/38) and hydrocephalus (15.8%, 6/38). Ventricular dilation occurred more frequently between 1 and 7 years and in Maltese and Poodle breeds, brain neoformations in dogs older than 7 years and in the Labrador breed, while hydrocephalus in dogs between 1 and 7 years old, mostly in Chihuahua and Pug.
14
artículo
Publicado 2018
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The objective of this study was to characterize spine injuries in dogs by computed tomography. The tomographic diagnoses were related to the demographic characteristics of dogs under study (sex, size, breed, and age). A total of 79 tomographic diagnoses were evaluated between June 2010 and July 2014. The results showed a greater frequency of lesions in males of defined breed, medium size and in the age group of 4-7 years. Twentytwo tomographic diagnoses were obtained, the most frequent being medial disc herniation (32.8%, 26/79) and laminar calcification of the dural sac (11.4%, 9/79). A total of 115 lesions were identified in the spine, the lower spine being more affected (48.7%, 56/115). At the level of the intervertebral spaces, the thoracic region T12-T13 presented the largest number of lesions (14%, 16/115), especially discopathies.
15
artículo
Publicado 2019
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The aim of this study was to determine encephalic lesions by computed tomography (CT scan) in 71 dogs that were submitted to the encephalic study by medical recommendation between 2011 and 2015 in Lima, Peru. The tomographic diagnoses were related to the sex, age, size and breed of the patients. Thirty-eight positive tomographic diagnoses of brain injury were identified (53.5%). The most frequent positive age group to brain injury was between 1 and 7 years and in medium-size dogs. The most frequent diagnosed lesions were ventricular dilation (29%, 11/38), brain neoformations (15.8%, 6/38) and hydrocephalus (15.8%, 6/38). Ventricular dilation occurred more frequently between 1 and 7 years and in Maltese and Poodle breeds, brain neoformations in dogs older than 7 years and in the Labrador breed, while hydrocephalus in dogs between 1 and 7 years old, mostly in Chihuahua and Pug.
16
artículo
Publicado 2024
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EL ESTUDIO TIENE COMO OBJETIVO EVALUAR LA DOSIS ABSORBIDA (DABS) EN TRATAMIENTOS DE BRAQUITERAPIA POR ALTA TASA DE DOSIS CON UNA FUENTE DE 192IR, CONSIDERANDO LAS HETEROGENEIDADES DE LOS TEJIDOS, TIPOS DE APLICADORES Y DIMENSIONES DEL PACIENTE. PARA ESTE FIN, SE REALIZARON CÁLCULOS DE ISODOSIS POR SIMULACIÓN MONTECARLO (MC) Y UNA PRUEBA DE EXACTITUD DE LA DOSIS ENTREGADA A UN OBJETO SIMULADOR, COMPARANDO LA DABS PLANIFICADA EN EL SISTEMA DE PLANIFICACIÓN DE TRATAMIENTO (TPS) CON LA DOSIS REGISTRADA POR EL DOSÍMETRO DE LUMINISCENCIA ÓPTICAMENTE ESTIMULADA. SE OBTUVO QUE EL TPS CALCULA ADECUADAMENTE LA DISTRIBUCIÓN DE DABS, CUANDO EL MEDIO ES AGUA; SIN EMBARGO, ES NECESARIO INCLUIR LAS LIBRERÍAS QUE CONSIDERAN LAS HETEROGENEIDADES PARA REALIZAR CON MAYOR PRECISIÓN EL CÁLCULO DE LA DISTRIBUCIÓN DE DABS EN LOS PACIENTES. SE CONCLUYÓ QUE AL REALIZAR UNA SIMULACIÓN MC ES UNA BUENA ...
17
artículo
Publicado 2012
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Neutrino interaction events in the MINERνA detector are visually represented with a web-based tool called Arachne. Data are retrieved from a central server via AJAX, and client-side JavaScript draws images into the users browser window using the draft HTML 5 "standard". These technologies allow neutrino interactions to be viewed by anyone with a web browser, allowing for easy hand-scanning of particle interactions. Arachne has been used in MINERνA to evaluate neutrino data in a prototype detector, to tune reconstruction algorithms, and for public outreach and education. © 2012 Published by Elsevier B.V.
18
artículo
Publicado 2017
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Charged-current νμ interactions on carbon, iron, and lead with a final state hadronic system of one or more protons with zero mesons are used to investigate the influence of the nuclear environment on quasielasticlike interactions. The transferred four-momentum squared to the target nucleus, Q2, is reconstructed based on the kinematics of the leading proton, and differential cross sections versus Q2 and the cross-section ratios of iron, lead, and carbon to scintillator are measured for the first time in a single experiment. The measurements show a dependence on the atomic number. While the quasielasticlike scattering on carbon is compatible with predictions, the trends exhibited by scattering on iron and lead favor a prediction with intranuclear rescattering of hadrons accounted for by a conventional particle cascade treatment. These measurements help discriminate between different mod...
19
artículo
Publicado 2018
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Construction support also was granted by the United States National Science Foundation under Award PHY-0619727 and by the University of Rochester. Additional support for participating scientists was provided by NSF and DOE (U.S.A.) by CAPES and CNPq (Brazil), by CoNaCyT (Mexico), by Proyecto Basal FB 0821, CONICYT PIA ACT1413, Fondecyt 3170845 and 11130133 (Chile), by PIIC (DGIP-UTFSM), by CONCYTEC, DGI-PUCP and IDI/IGI-UNI (Peru)
20
artículo
Publicado 2017
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The semiexclusive channel νμ þ CH → μ−π0 þ nucleonðsÞ is analyzed using MINERvA exposed to the low-energy NuMI νμ beam with spectral peak at Eν ≃ 3 GeV. Differential cross sections for muon momentum and production angle, π0 kinetic energy and production angle, and for squared four-momentum transfer are reported, and the cross section σðEνÞ is obtained over the range 1.5 GeV ≤ Eν < 20 GeV. Results are compared to GENIE and NuWro predictions and to published MINERvA cross sections for charged-current πþðπ0Þ production by νμðν¯μÞ neutrinos. Disagreements between data and simulation are observed at very low and relatively high values for muon angle and for Q2 that may reflect shortfalls in modeling of interactions on carbon. For π0 kinematic distributions, however, the data are consistent with the simulation and provide support for generator treatments o...
