Revista de la Facultad de Medicina Veterinaria y de Zootecnia最新文献

{"title":"Grado de desarrollo del folículo preovulatorio y su relación con el tamaño del cuerpo lúteo y la producción de progesterona en las razas Romosinuano (RS) y Brahman (Br)T0","authors":"A. Vejarano, A. Hernández","doi":"10.15446/RFMVZ.V68N1.97255","DOIUrl":"https://doi.org/10.15446/RFMVZ.V68N1.97255","url":null,"abstract":"To compare in the preovulatory follicles of bovine females of the Brahman (Br) and Romosinuano (rs) breeds the development of the different follicular components, such as the size of the follicular antrum, the thickness and volume occupied by the granulosa (cg) and theca interna cells (ti) layers and their possible relationships with the deve- lopment of the corpus luteum (cl) and progesterone (P4) production, 5 rs and 5 Br females were used; ultrasound follow-up was performed during 2 estrous cycles and blood serum sampling was carried out to determine progesterone (P4) levels by Elisa, at the third estrus, the ovary containing the preovulatory follicle was removed, and a diametral cut was made on the stigma of the follicle to divide it into 2 equal parts. Histological sections were made of one of the parts and follicular morphometry was determined. Duration of the estrous cycle in Br females ranged between 18 and 21 days, with an average of 19,9 ± 1,6 days and between 18 and 24 with an average of 21,2 ± 1,69 days for rs cows. Estrus duration was 13,9 ± 6,98 and 9,60 ± 4,72 h for rs and Br breeds, respectively. The estrus-ovulation interval was 21,20 ± 5,07 h for the Br breed animals and 24,40 ± 6,43 rs. There were no differences between breeds or in thickness (rs: 55,12 ± 6,46 µm vs. Br: 49,48 ± 17,07 µm) p > 0,05, nor in the volume occupied by the granulosa cells layer (rs: 27,93 ± 6,11 mm3 vs. Br: 25,40 ± 13,85 mm3) of pre-ovulatory follicles; neither in the thickness (rs: 122,50 ± 20,53 µm vs. Br: 129,61 ± 84,85 µm) nor in the volume (rs: 64,97 ± 19,71 mm3 vs. Br: 59,83 ± 25,67 mm3) of the internal theca cells; p < 0,05. The maximum cl development for all the females was observed on day 12,6 ± 4,05 (day 0 = estrus), with an average diameter of 22,92 ± 3,60 mm. For those of the rs breed the maximum diameter was observed on average on day 14,88 ± 3,4, with 23,06 ± 3,9 mm, while for those of the Br breed it was day 10,00 ± 3,16 with an average diameter of 22,75 ± 3,16 mm; at this time the mean progesterone concentration was 5,37 ± 1,38 ng/ml for the rs breed and 5,74 ± 0,89 ng/ml for the Br breed. There were no significant differences between breeds (p-value: 0,5561). It was concluded that there are no differences in the physiological events studied between the studied breeds. Present results, undoubtedly, might serve as basis to future studies in bovines in tropical zones.","PeriodicalId":30232,"journal":{"name":"Revista de la Facultad de Medicina Veterinaria y de Zootecnia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45110492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efecto del ácido alfa lipoico sobre la peroxidación no enzimática en mitocondrias de corazón y cerebro de rata","authors":"Mónica Marmunti, Mariana Gavazza, Alejandro Palacios","doi":"10.15446/RFMVZ.V68N1.97189","DOIUrl":"https://doi.org/10.15446/RFMVZ.V68N1.97189","url":null,"abstract":"Alphalipoc acid (ala) has been characterized as an efficient antioxidant. It has been proposed as a potential therapeutic agent in the treatment or prevention of different pathologies that may be related to an imbalance of the oxido reductive cell state. The objective of this work was to analyze the sensitivity to non-enzymatic peroxidation (nep) (ascorbate-Fe ++ dependent) in heart and brain mitochondria of rats incubated with an ala solution. nep was evaluated by the chemiluminescence method (cl). When the control samples (without the addition of ascorbate-Fe++) were compared with the ascorbate-Fe++ dependent samples, a significant increase in the light emission. Simultaneously, the mitochondria of both organs were incubated with different concentrations of ala (0.05, 0,15 and 0,25 mg/ml), observing a differential protection. Rat brain mitochondria incubated with doses of 0.15 and 0,25 mg/ml of ala were protected from the effects of nep, while in cardiac mitochondria, protection was only observed with the highest dose of ala (0,25 mg/ml). The cl analysis indicated that rat brain mitochondria were protected more efficiently than rat heart mitochondria. In the latter case, it will be necessary to test new doses of ala to demonstrate the effects on these membranes. In conclusion, ala acted as a protective antioxidant of the membranes of both organs against peroxidative damage.","PeriodicalId":30232,"journal":{"name":"Revista de la Facultad de Medicina Veterinaria y de Zootecnia","volume":"68 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42672646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prevalencia y factores de riesgo del comportamiento anormal estereotipado aerofagia en el caballo criollo colombiano","authors":"J. Marulanda, S. Gil, J. Aranzales","doi":"10.15446/RFMVZ.V68N1.97250","DOIUrl":"https://doi.org/10.15446/RFMVZ.V68N1.97250","url":null,"abstract":"Crib-biting is the most common classic stereotype in equines, with a poorly understood etiology; however, it is recognized for being multifactorial in nature. Furthermore, it has been associated with negative effects on the health of horses. The objective of this study was to describe the risk factors and the frequency of presentation of crib-biting in a population of Colombian Creole Horses (ccc by its Spanish acronym). We surveyed Forty-two properties, which meant a total of 1063 ccc (488 males and 575 females). Of this population, 5,27% (56 animals) were fully identified with crib-biting. This prevalence was higher than most other reports in South America. Crib-biting is possibly due to both inherent of the animal and external factors related to management; however, the design of longitudinal studies on management practices and genetic lines within the breed is required to quantify and validate the information related to the possible genetic or racial predisposition for this and other stereotypes and abnormal behaviors observed in horses.","PeriodicalId":30232,"journal":{"name":"Revista de la Facultad de Medicina Veterinaria y de Zootecnia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46056072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Avance de tuberosidad tibial con heteroimplante óseo para el tratamiento de ruptura de ligamento cruzado anterior en caninos","authors":"D. M. Pérez, M. M. Martínez, J. Cardona","doi":"10.15446/RFMVZ.V68N1.97249","DOIUrl":"https://doi.org/10.15446/RFMVZ.V68N1.97249","url":null,"abstract":"The clinical and radiological evaluations are techniques used for the diagnosis of the anterior cruciate ligament rupture (lcar) and the post-operatory assessment of corrective surgeries. It was proposed as an objective to describe the post-operatory results of the advance technique of tibial tuberosity in canines with lcar using bovine bone conserved in 98% glycerin. Five canines were intervened and with no other radiological changed in the related bone columns. The bone heteroimplant was cut in a wedge-like manner and for its size it was taken into account the pre-operatory measurement that the knee needed to reach the advancement angle of the tibial crest. Next, the bone implant was fixated to the local receptor with metallic implants (Kirschner needles and orthopedic wire). In the post-op, the canines were evaluated for 90 days for clinical signs such as claudication, pain when flexing and extending and inflammation according to the knee circumference, and for 120 days the advancement angle of the tibia and the radiopacitry of the heteroimplant in relation to the surrounding bone. The trial established that the clinical and radiological parameters have a statistically significant effect; however, the evaluation of the tibial advancement angle does not have a significant effect between the patient and the post-operatory days. During the evaluation period, the heteroimplant bovine bone proved to be effective to stabilize the knee in canines with lcar.","PeriodicalId":30232,"journal":{"name":"Revista de la Facultad de Medicina Veterinaria y de Zootecnia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45745375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enfermedad podal en bovinos: prevalencia y asociación con algunas variables","authors":"L. M. Arrieta, J. M. Cruz, Luis Gabriel González-Herrera","doi":"10.15446/RFMVZ.V68N1.97257","DOIUrl":"https://doi.org/10.15446/RFMVZ.V68N1.97257","url":null,"abstract":"Foot disease is one of the most difficult syndromes to control in the dairy industry. The goal of this study was to quantify the prevalence of foot disease, evaluating its association with factors such as race, calving order and weight. This is a retrospective study using the health and production records of a dairy herd located in the high tropics of Colombia. The racial components present were F1 Holstein × Blanco Orejinegro, 3/4 Holstein 1/4 Blanco Orejinegro, 5/8 Holstein 3/8 Blanco Orejinegro, Holstein 100%. 6 delivery orders were considered. The variable foot disease presents a binomial distribution. The effect of the factors was verified using a generalized linear model, by means of a logistic regression (PROC GENMOD, sas version 9.4). In the event of significant differences, the sas LSMEANS procedure (version 9.4) and an Odds Ratio were applied between the levels that presented significance. The prevalence of foot disease in the herd was 10,55%. The risk factors considered were statistically significant: racial component (p < 0,0009), calving order (p < 0,0001) and average weight of the cows (p < 0,0001). An increase in the prevalence of the disease was observed associated with the Holstein breed, high calving order and low body weight. The prevalence of foot disease was higher in pure Holstein cows and lower in Holstein cows crossed with Blanco Orejinegro due to the resistance due to heterosis that the creole breed contributes. The increase in the delivery order as well as the low weight are related to a higher prevalence of this disease.","PeriodicalId":30232,"journal":{"name":"Revista de la Facultad de Medicina Veterinaria y de Zootecnia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45836570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluación por gastroscopia simple y cromoendoscopia convencional de la superficie gastroesofágica y duodenal proximal del equino. Estudio piloto","authors":"Alejandro Montoya, J. García, José Ramón Martínez Aranzalez","doi":"10.15446/rfmvz.v67n2.90709","DOIUrl":"https://doi.org/10.15446/rfmvz.v67n2.90709","url":null,"abstract":"Las enfermedades gastrointestinales equinas tienen una alta incidencia con un pronóstico variable en la práctica clínica. La mayoría de los estudios se limitan a describir lesiones ulcerativas y lesiones inflamatorias. El objetivo de este estudio fue evaluar el potencial diagnóstico complementario de la cromoendoscopia convencional en la mucosa gastroesofágica y duodenal proximal del equino. El estudio incluyó 20 caballos criollos colombianos de ambos sexos (12 hembras y 8 machos), con edades entre 5 y 20 años, peso entre 250 y 350 kilogramos, condición corporal 4-5/9 y con historial de alteraciones digestivas en los últimos 3 meses; quienes previo a la evaluación por gastroscopia y cromoendoscopia se sometieron a ayuno (sólidos 12h y líquidos 4h) y sedación (xilacina 0,5 mg/kg/iv). Se utilizaron tinciones como rojo fenol, lugol, índigo carmín, azul de metileno y ácido acético y se tomaron biopsias de los segmentos que mostraron reacción. El azul de metileno reveló 52% de las lesiones, el lugol 19%; por su parte, el rojo fenol, el índigo carmín y el ácido acético revelaron el 9,5% restante. El epitelio escamoso fue el más afectado (66,6%), el glandular (19%), antro pilórico (9,5%) y duodeno proximal (4,7%). Los hallazgos histopatológicos fueron hiperplasia, hipertrofia, hiperqueratosis, congestión, degeneración vacuolar, infiltrados celulares, fibrosis, necrosis y atrofia en diferentes grados de severidad. La cromoendoscopia reveló lesiones prematuras, que pasaron desapercibidas con las técnicas convencionales de endoscopia del tracto digestivo. Este es el primer estudio que emplea la cromoendoscopia en equinos; a pesar de que la técnica mejoró la visualización y facilitó la ubicación y descripción de lesiones ulcerativas prematuras a través de la histopatología, se recomiendan mayores estudios controlados y con un número más amplio de muestras.","PeriodicalId":30232,"journal":{"name":"Revista de la Facultad de Medicina Veterinaria y de Zootecnia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45535914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Uso de perifiton en un sistema de policultivo en agro acuicultura integrada en la comunidad indígena de Jimaín (Colombia)","authors":"J. C. Durán-Izquierdo, R. J. Mindiola-Romo, G. A. Wills-Franco, Sandra C Pardo-Carrasco, A. P. Muñoz-Ramírez","doi":"10.15446/rfmvz.v67n3.93933","DOIUrl":"https://doi.org/10.15446/rfmvz.v67n3.93933","url":null,"abstract":"Los Sistemas de Agro Acuicultura Integrada (SAAI) han sido estudiados como opciónpara la producción de pescado en comunidades con recursos limitados. Así mismo, eluso de perifiton se ha convertido recientemente en una alternativa viable por el aportede alimento natural de bajo costo. El objetivo de este estudio fue evaluar el efecto delperifiton sobre el desempeño productivo del policultivo Piaractus sp. (cachama híbrida)y Prochilodus magdalenae (bocachico) en SAAI en la comunidad Indígena de Jimaín,Colombia. Se sembraron 1,5 alevinos de cachama híbrida y 1,5 bocachicos/m2, con pesopromedio de 0,49 ± 0,14 g y 1,83 ±1,61 g respectivamente, en seis estaques en tierra de90 m2, tres de los cuales contaron con varas de madera (3 varas/m2) para la fijación deperifiton. La duración del cultivo fue de 135 días. Los tratamientos (CS: con sustratoy SS: sin sustratos) recibieron una dieta suplementaria dos veces al día, calculada comoporcentaje de la biomasa con ajuste quincenal. Se realizaron biometrías quincenales. Losdatos productivos por especie y para el policultivo se evaluaron mediante ANOVA conun modelo lineal general (p < 0,05). Los datos de peso (g) y longitud estándar (cm) porespecie se evaluaron mediante un modelo mixto de medidas repetidas. No se encontraronefectos del sustrato sobre los parámetros productivos analizados tanto para cada especie,como para el policultivo. Se presentó interacción significativa para el peso del bocachicoel día 90 (CS: 74,7 y SS: 47,1). Según los resultados obtenidos, la utilización de perifitony el manejo en policultivo de especies nativas requiere más estudios.","PeriodicalId":30232,"journal":{"name":"Revista de la Facultad de Medicina Veterinaria y de Zootecnia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47549721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Parásitos gastrointestinales en mamíferos silvestres cautivos en el Centro de Fauna de San Emigdio, Palmira (Colombia)","authors":"Y. D. Sierra, N. Vence, P. Herrera, A. S. Cañate, J. Vanegas","doi":"10.15446/RFMVZ.V67N3.93930","DOIUrl":"https://doi.org/10.15446/RFMVZ.V67N3.93930","url":null,"abstract":"La parasitosis intestinal en mamíferos silvestres es una de las principales complicaciones debido a las condiciones exógenas del cautiverio. Predisponen al animal a complicaciones fisiológicas o infecciones secundarias que impiden su rehabilitación y reintroducción. El objetivo es determinar la presencia de parásitos gastrointestinales en mamíferos silvestres del Centro de Atención y Valoración de fauna silvestre del Centro de Educación Ambiental San Emigdio, San Emigdio, Palmira, Colombia. Se tomaron muestras fecales de 25 animales cautivos en el Centro de Atención y Valoración, analizándose mediante dos técnicas: a) montaje con solución salina al 0,85 % y solución de lugol al 1% y b) técnica de flotación por solución saturada (Sheather) con densidad de 1.28g/ml, encontrándose un 36% de positividad. Se encontró Enterobius vermicularis, Fasciola sp., Entamoeba sp. y Ancylostoma sp. El grupo de primates no humanos presentó cargas parasitarias más altas con respecto a felinos, caninos y demás mamíferos del estudio. Los microorganismos identificados, son reconocidos como parásitos causantes de complicaciones en animales cautivos y en vida libre; al igual, son catalogados como posibles riesgos zoonóticos.","PeriodicalId":30232,"journal":{"name":"Revista de la Facultad de Medicina Veterinaria y de Zootecnia","volume":"67 1","pages":"230-238"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49148520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prevalencia de trematodos y algunos factores de riesgo en vacas lecheras en Paipa, Boyacá (Colombia)","authors":"R. J. Andrade-Becerra, L. E. Tarazona-Manrique, Julio César Vargas-Abella","doi":"10.15446/RFMVZ.V67N3.93928","DOIUrl":"https://doi.org/10.15446/RFMVZ.V67N3.93928","url":null,"abstract":"Este estudio se llevó a cabo para establecer la prevalencia e identificar los factores de riesgo asociados con las infestaciones por tremátodos en ganado lechero Holstein en el valle de Paipa-Boyacá. Las muestras fecales recogidas de 100 bovinos seleccionados aleatoriamente se examinaron utilizando una técnica de sedimentación simple para el recuento diferencial de huevos tremátodos. Se buscaron huevos de tres grupos de tremátodos, a saber: Fasciola hepatica, Paramphistomum spp., y Cotylophorum spp. La prevalencia específica de trematodos para F. hepática, Paramphistomum spp., y Cotylophorum spp., fue del 12%, 9% y 4%, respectivamente. Se observó una superposición sustancial en el recuento de F. hepatica y Paramphistomum spp. La prevalencia de los tres tremátodos identificados en este estudio se asoció significativamente (P <0,05) con la condición corporal y la raza, mientras que la prevalencia de Fasciola hepatica y Paramphistomum spp., fue asociada con la edad. La prevalencia de los tres principales trematodos de importancia para la salud animal con una alta tasa de infestación mixta junto con una mala condición corporal, sugiere una pérdida económica sustancial incurrida debido a la reducción de la productividad del ganado en el área de estudio.","PeriodicalId":30232,"journal":{"name":"Revista de la Facultad de Medicina Veterinaria y de Zootecnia","volume":"67 1","pages":"205-218"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43806975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efectos de la adición de probiótico Saccharomyces cerevisiae sobre histomorfología intestinal en pollos de engorde","authors":"D. Quevedo, J. E. Ochoa, J. R. Corredor, S. L. Pulecio","doi":"10.15446/rfmvz.v67n3.93931","DOIUrl":"https://doi.org/10.15446/rfmvz.v67n3.93931","url":null,"abstract":"  \u0000Este trabajo describe los efectos del probiótico Saccharomyces cerevisiae sobre el área, número de criptas de Lieberkühn en duodeno y yeyuno, y producción de moco en ambas secciones intestinales. Fueron empleados los tejidos de un total de 27 individuos, clasificados en grupo control – GC (n=12) y grupo suplementado con probióticos – GP (n=15). Los resultados revelaron que los grupos suplementados con el Saccharomyces cerevisiae presentaron una mayor amplitud del área de las criptas en duodeno (p= 0,0119) y yeyuno (p= 0,0355), menor número de criptas por milímetro en duodeno (p= 0,0420) y mayor producción de moco en duodeno respecto al grupo control (p= 0,0185), mientras que en yeyuno no se observaron diferencias significativas. Se concluyó que el uso de Saccharomyces cerevisiae aumentó el tamaño del área de las criptas en ambas secciones intestinales y aumentó la producción de moco en duodeno; lo cual al aumentar la superficie de absorción intestinal seguramente podría resultar en mejoras de los parámetros productivos.","PeriodicalId":30232,"journal":{"name":"Revista de la Facultad de Medicina Veterinaria y de Zootecnia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44997805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}