Abstract Microbial biomass is considered a renewable and environmentally friendly resource. Thus, the research conducted a kinetic study and thermodynamic equilibrium modeling of the cobalt (Co) and manganese (Mn) bioadsorption process using the Rhodococcus opacus (RO) strain as a biosorbent. The inactive biomass subjected to 0.1 M NaOH pretreatment was brought into contact with synthetic solutions of Co and Mn. The experimental data for the Co(II) and Mn(II) bioadsorption process were fit to the Langmuir model with kads of 0.65 and 0.11 L.mg-1, respectively. A better statistical fit was also obtained for the pseudo-second order kinetic model (R2Co(II) = 0.994 and R2Mn(II) = 0.995), with 72.3% Co(II) and 80% Mn(II) removals during the first 10 min. In addition, a higher affinity of RO for the Co(II) ion was observed, with maximum uptake values of 13.42 mg.g-1; however, a higher adsorption rate was observed for Mn(II) ion (k = 0.21 g.mg-1.min-1 at 318 K). The bioadsorption process was spontaneous and dependent on temperature, being endothermic and irreversible for the Co(II) ion (∆H = 2951.91 J.mol-1) and exothermic and reversible for the Mn(II) ion (∆H = -2974.8 J.mol-1). The kinetic and thermodynamic equilibrium modeling allowed to identify the main mechanisms involved in the biosorption process of both metals.

Objective: To evaluate the influence of high altitude on C-reactive protein (CRP) levels in adults with abdominal visceral adiposity. Materials and methods: A quantitative study with quasi-experimental design, which included twenty-four (24) male medical students from the National University of Trujillo, selected by non-probability convenience sampling and study subject, evaluated at 0 and 4,386 m.a.s.l., and classified according to their degree of abdominal visceral adiposity: normal (G1) and high (G2). Results: The CRP level of G1 in relation to G2 showed no significant difference. Regarding CRP levels, Wilcoxon rank-sum (non-parametric) test was used for G2 and Student´s t-test was used for G1, with significance being shown in both cases. Conclusions: Variations on CRP levels in high altitude compared to sea level in both groups were significant

Objetivo: Evaluar la influencia de la altura en los niveles de proteína C reactiva (PCR) en adultos con adiposidad visceral abdominal. Materiales y métodos: Se realizó un estudio cuantitativo con diseño cuasi-experimental, que incluyó veinticuatro estudiantes de medicina de la Universidad Nacional de Trujillo, sexo masculino, seleccionados de manera no probabilística por conveniencia y sujeto participante, que fueron evaluados a 0 y 4386 m s. n. m. y clasificados de acuerdo al grado de adiposidad visceral abdominal: normal (G1) y elevada (G2). Resultados: El nivel de PCR de G1 en relación a G2 no tuvo diferencia significativa. Respecto a los niveles de PCR de G2 se empleó la prueba no paramétrica de Wilcoxon y para G1 se usó la prueba T-student, evidenciándose una significancia en ambos casos. Conclusiones: Las variaciones de los niveles de PCR en altura con respecto al basal de ambos grupos fueron significativos

Objective: To determine the frequency of early and late complications using the Lichtenstein and Nyhus techniques for the management of inguinal hernias in the Peruvian Military Central Hospital. Material and methods: A cross-sectional study was performed, in which we analyzed the all gases of inguinal hernia that underwent surgical repair during the 2012-2014 period. Results: Two hundred and two cases were analyzed (65% from male subjects), of which 11% and 89% were operated using the Nyhus and Lichtenstein techniques, respectively. When comparing both techniques, no differences were found in terms of surgical time (43.0 ± 13.6 vs. 39.1 ± 8.9 minutes; p= 0.140), hospitalization duration (3.9 ± 1.2 vs. 3.8 ± 0.8 days; p= 0.635), and late complications (4% vs. 0%; p= 0.603), but we found significant differences in the frequency of early complications (17% vs. 0%; p= 0.028). The most frequent early and late complications were neuralgia (12% vs. 0%) and recurrence (3% vs. 0%), respectively. Using the logistic regression analysis we found that both the operating time (odds ratio (OR): 1.07; 95% confidence interval (CI): 1.04-1.11) and the length of hospitalization (OR: 1.55; 95% CI: 1.10-2.19), were significantly associated with the occurrence of early complications. Conclusions: In the experience of the Peruvian Military Central Hospital both Lichtenstein and Nyhus techniques proved to be quite safe for the surgical management of inguinal hernias. Early complications were more frequently observed with the Lichtenstein technique; and, with both techniques, complications were more frequent with longer surgical times and prolonged hospitalization times

Objetivo: Determinar la incidencia de complicaciones tempranas y tardías según técnicas de Lichtenstein y Nyhus en el manejo de hernias inguinales en el Hospital Militar Central (HMC). Material y métodos: Transversalmente se analizaron todos los casos de hernia inguinal tratados quirúrgicamente en el HMC durante el período 2012-2014. Resultados: 202 casos (65%, varones) fueron analizados, de los cuales el 11% y el 89% fueron operados con las técnicas de Nyhus y Lichtenstein, respectivamente. Al comparar ambas técnicas no se encontraron diferencias en sus tiempos quirúrgicos (43,0±13,6 vs. 39,1±8,9 minutos; p=0,140), tiempos de hospitalización (3,9±1,2 vs. 3,8±0,8 días; p=0,635) e incidencia de complicaciones tardías (4% vs. 0%; p=0,603), pero sí al comparar la incidencia de complicaciones tempranas (17% vs. 0%; p=0.028). Las complicaciones tempranas y tardías más frecuentes fueron de tipo neuralgias (12% vs. 0%) y recurrencias (3% vs. 0%), respectivamente. Al análisis de regresión se encontró que tanto el tiempo quirúrgico (Odds ratio (OR); 1,07; Intervalo de confianza (IC) al 95%: 1,04-1,11) como el tiempo de hospitalización (OR: 1,55; IC 95%: 1,10-2,19) se encontraban significativamente asociados la ocurrencia de complicaciones tempranas. Conclusiones: En la experiencia del HMC ambas técnicas, Lichtenstein y Nyhus, demostraron ser alternativas seguras en el manejo quirúrgico de hernias inguinales, siendo las complicaciones tempranas más frecuentes con la técnica de Lichtenstein y, en ambos casos, más frecuentes mientras mayor el tiempo quirúrgico y el tiempo de hospitalización