Spectroscopic, crystallographic, and Hirshfeld surface characterization of nine-membered-ring-containing 9-meth-oxy-3,4,5,6-tetra-hydro-1H-benzo[b]azonine-2,7-dione and its parent tetra-hydro-car-ba-zole.

9-Meth-oxy-3,4,5,6-tetra-hydro-1H-benzo[b]azonine-2,7-dione, C13H15NO3, (I), and 6-meth-oxy-1,2,3,4-tetra-hydro-car-ba-zole, C13H15NO, (II), represent the structures of a benzoazonine that contains a nine-membered ring and its parent tetra-hydro-car-ba-zole. The mol-ecules of (I) pack together via strong amide N-H⋯O hydrogen bonding and weak C-H⋯O inter-actions, whereas the parent tetra-hydro-car-ba-zole (II) packs with C/N-H⋯π inter-actions, as visualized by Hirshfeld surface characterization.

Relationship Between Xerostomia and Hyposalivation in Senior Chilean People

ABSTRACT: Background: Hyposalivation is an objective decrease in salivary flow and it can produce xerostomia; which is a subjective sensation of dry mouth, common condition in senior population. Objectives: To identify the association between xerostomia and hyposalivation and its risk factors in people aged 60 years and older, and to investigate the association with medications, habits and other oral complications. Methods: 211 participants were included. Xerostomia data was collected using a validated Spanish-Xerostomia Inventory (XI-sp). Unstimulated whole-salivary flow rates were measured to detect hyposalivation. Results were analyzed using Chi-square, Fisher tests and multivariate logistic regression analysis. p <.05. Results: No significant association was detected between Xerostomia and Hyposalivation (p=.0666). Xerostomia 84.3%(p=.036) and hyposalivation 81.4%(p=.004) occur more frequently in women. A significant association was found between hyposalivation with the female gender (OR = 2.46, 95% confidence interval (CI): 1.19-5.11, p=0.015); denture stomatitis (OR=3.71, 95% CI:1.03-13.3, p=0.045) and atrophic glossitis (OR=3.72, 95% CI:1.78-8.1, p=0.001). Only female gender (OR=2.54; 95% CI:1.19-5.43, p=0.016) was significantly associated with xerostomia. Conclusions: No statistically significant association was found between hyposalivation and xerostomia. A significant association was found between oral candidiasis, denture stomatitis and the atrophic tongue with hyposalivation. Being woman was a risk factor for xerostomia and hyposalivation.

Prevalencia de dolor de hombro y sus factores asociados en lesionados medulares parapléjicos usuarios de silla de ruedas / Shoulder pain prevalence and associated factors in spinal cord-injured paraplegic wheelchair users

INTRODUCCIÓN: la prevalencia de dolor de hombro en pacientes parapléjicos usuarios de silla de ruedas es elevada. existe consenso en que el uso de la silla de ruedas manual es un factor importante en el origen de este dolor. no existen estudios en Chile acerca del tema. OBJETIVO: determinar la prevalencia y factores asociados a dolor de hombro en personas con paraplejia secundaria a lesión medular traumática, usuarios de sillas de ruedas, describiendo también las características del dolor. MATERIALES Y MÉTODOS: estudio descriptivo transversal en personas adultas con paraplejia secundaria a lesión medular traumática, que cumplieron los criterios de inclusión. previo consentimiento informado, se les aplicó un cuestionario ISCIPDS:B, enfocado a dolor de hombro. además de preguntar qué tipo de silla de ruedas utilizan, tiempo de autopropulsión, uso de guantes de propulsión y ocupación previa a la lesión medular. se recuperaron datos de registros en ficha clínica para identificar sexo, edad, fecha del accidente, ASIA impairment scale (AIS) y nivel neurológico de la lesión. RESULTADOS: 59 pacientes cumplieron los criterios de inclusión. de ellos, el 61% de ellos refirió dolor en hombro (s). no hubo una asociación estadísticamente significativa entre el dolor en el hombro y la edad, tiempo de evolución de lesión medular, AIS, nivel de lesión neurológica, tipo de silla de ruedas ni el tiempo de uso de la silla de ruedas manual. hubo una asociación estadísticamente significativa entre uso de guantes de propulsión y el dolor de hombro. la afectación bilateral es más frecuente que unilateral. el dolor promedio fue de NRS 5,6. la duración fue referida principalmente como constante, mayor a 1 hora pero menor a 24 horas. la mayor intensidad de dolor se reportó como vespertina. CONCLUSIONES: la prevalencia de dolor de hombro en pacientes chilenos con paraplejia secundaria a lesión medular traumática es alta. es necesaria mayor investigación para determinar si los hallazgos de este estudio se extrapolan a la población general con lesión medular traumática.

INTRODUCCIÓN: the prevalence of shoulder pain in paraplegic patients using wheelchair is high. there is consensus that the use of manual wheelchair is an important factor in the origin of this pain. there are no studies in Chile about this. OBJECTIVE: to determine the prevalence and factors associated with shoulder pain in paraplegic patients for traumatism with spinal cord injury (SCI) wheelchair users, also describing the characteristics of pain. MATERIALS AND METHODS: descriptive transversal study in adults paraplegic patients for traumatism with SCI, who met inclusion criteria. an ISCIPDS:B questionnaire was previously informed, focused on shoulder pain, also asking what kind of wheelchair is being used, time of propulsion, use of propulsion gloves, and if it was being used before the spinal cord injury. further clinical record data were retrieved to identify gender, age, date of accident, ASIA, and neurological injury level. RESULTS: 59 patients met the inclusion criteria, 61% of them reported shoulder pain. there was no statistically significant association between shoulder pain and age, duration of SCI, ASIA, neurological level of injury, type of wheelchair, nor usage time of the manual wheelchair. there was a statistically significant association between the use of gloves propulsion and shoulder pain. bilateral involvement is more often. the average pain was NRS 5.6. the duration was mainly referred as a constant greater than 1hour but less than 24hours. the greater intensity of pain was reported during the evening. CONCLUSIONS: the prevalence of shoulder pain in chilean paraplegic for spinal cord traumatic injury is high. more research is needed to determine whether the findings of this study are extrapolated to the general population.

Hydrogen production and microbial kinetics of Clostridium termitidis in mono-culture and co-culture with Clostridium beijerinckii on cellulose.

Cellulose utilization by hydrogen producers remains an issue due to the low hydrogen yields reported and the pretreatment of cellulose prior to fermentation requires complex and expensive steps. Clostridium termitidis is able to breakdown cellulose into glucose and produce hydrogen. On the other hand, Clostridium beijerinckii is not able to degrade cellulose but is adept at hydrogen production from glucose; therefore, it was chosen to potentially enhance hydrogen production when co-cultured with C. termitidis on cellulose. In this study, batch fermentation tests were conducted to investigate the direct hydrogen production enhancement of mesophilic cellulolytic bacteria C. termitidis co-cultured with mesophilic hydrogen producer C. beijerinckii on cellulose at 2 g l-1 compared to C. termitidis mono-culture. Microbial kinetics parameters were determined by modeling in MATLAB. The achieved highest hydrogen yield was 1.92 mol hydrogen mol-1 hexose equivalentadded in the co-culture compared to 1.45 mol hydrogen mol-1 hexose equivalentadded in the mono-culture. The maximum hydrogen production rate of 26 ml d-1 was achieved in the co-culture. Co-culture exhibited an overall 32 % enhancement of hydrogen yield based on hexose equivalent added and 15 % more substrate utilization. The main metabolites were acetate, ethanol, lactate, and formate in the mono-culture, with also butyrate in the co-culture. Additionally, the hydrogen yield of C. beijerinckii only in glucose was 2.54 mol hydrogen mol-1 hexose equivalent. This study has proved the viability of co-culture of C. termitidis with C. beijerinckii for hydrogen production directly from a complex substrate like cellulose under mesophilic conditions.

Performance of mesophilic biohydrogen-producing cultures at thermophilic conditions.

In this study, batch tests were conducted to investigate the performance of mesophilic anaerobic digester sludge (ADS) at thermophilic conditions and estimate kinetic parameters for co-substrate fermentation. Starch and cellulose were used as mono-substrate and in combination as co-substrates (1:1 mass ratio) to conduct a comparative assessment between mesophilic (37 °C) and thermophilic (60 °C) biohydrogen production. Unacclimatized mesophilic ADS responded well to the temperature change. The highest hydrogen yield of 1.13 mol H2/mol hexose was observed in starch-only batches at thermophilic conditions. The thermophilic cellulose-only yield (0.42 mol H2/mol hexose) was three times the mesophilic yield (0.13 mol H2/mol hexose). Interestingly, co-fermentation of starch-cellulose at mesophilic conditions enhanced the hydrogen yield by 26% with respect to estimated mono-substrate yields, while under thermophilic conditions no enhancement in the overall yield was observed. Interestingly, the estimated overall Monod kinetic parameters showed higher rates at mesophilic than thermophilic conditions.

Microbial kinetics of Clostridium termitidis on cellobiose and glucose for biohydrogen production.

OBJECTIVE: To determine Monod kinetics parameters (µmax, Ks, kd and YX/S) of the mesophilic H2 producer Clostridium termitidis grown on glucose and cellobiose by modeling in MATLAB. RESULTS: Maximum specific growth rates (µmax) were 0.22 and 0.24 h(-1) for glucose and cellobiose respectively; saturation constants (Ks) were 0.17 and 0.38 g l(-1) respectively and the biomass yields (YX/S) were 0.26 and 0.257 g dry wt g(-1) substrate. H2 yields of 1.99 and 1.11 mol H2 mol(-1) hexose equivalent were also determined for glucose and cellobiose respectively. CONCLUSION: The microbial kinetics of this model microorganism will enhance engineering biofuel production applications.

Síndrome coronario agudo como manifestación clínica de la reestenosis intrastent / Acute coronary syndrome as a clinical presentation of in-stent re-stenosis

Antecedentes: La reestenosis intrastent (RES) es considerada responsable sólo de una mayor necesidad de reintervención. Sin embargo, se ha reportado que 30-60 por ciento de las RES se presentan como un síndrome coronario agudo (SCA). Objetivo: Conocer las incidencias de SCA como manifestación de RES y su relación con mortalidad. Método: Se analizaron pacientes que presentaron SCA como manifestación de RES y se compararon con los de presentación estable (ECE) respecto de la edad, factores de riesgo, evento clínico inicial que motivó la angioplastía coronaria (AC), stent utilizado y las características de la RES. Se comparó mortalidad a 30 días y alejada. Resultados: Entre 2006 y 2011, analizamos 210 pacientes con RES, de los cuales 68 (32 por ciento) se presentaron como SCA y 142 (68 por ciento) como ECE. La edad fue similar en ambos grupos (62,6 vs 62,7 años, NS). La prevalencia de diabetes fue 30 por ciento vs 22 por ciento (p=0,02), respectivamente, sin diferencias en otras características. Del grupo con SCA, 21 pacientes (31 por ciento) tuvieron un infarto con supradesnivel ST (SDST), 20 (29 por ciento) un infarto sin SDST y 27 (40 por ciento) una Angina Inestable (AI). La mortalidad a 30 días fue 2,9 por ciento vs 2,1 por ciento (NS), y la mortalidad alejada fue 12,2 por ciento vs 6,4 por ciento (p=0.4). No se identificaron predictores independientes para la presentación como SCA. Conclusion: El SCA con todas sus manifestaciones clínicas es una presentación frecuente de RES. Estos resultados sugieren que la RES no es una entidad benigna.

In-stent re-stenosis (ISR) has been associated with a high incidence of reintervention, but in addition some reports indicate that acute coronary syndromes (ACS) are a frequent clinical presentation. In this study of 210 patients with ISR we found that ACS was the presenting event in 31 percent of patients while a stable clinical event occurred in 69 per cent. In the ACS group 21 patients (31 percent) had an STEMI, 20 (29 percent) an NSTE-MI and 27 (40 per cent) patients presented with unstable angina. Comparing ACS vs SE groups, clinical characteristics were similar, except for diabetes which was more frequent in ACS (30 percent vs 22 percent, p=0,02). Thirty day mortality was 2,9 percent vs 2,1 per cent (p=ns) and long term mortality was 12,2 per cent vs 6,4 percent, respectively (p=0.18). In multivariate analysis, there were no independent predictors of an SCA presentation. In conclusion, ACS is a frequent clinical presentation of ISR and it is not always a benign condition.

Increased fibroblast density in actinic cheilitis: association with tryptase-positive mast cells, actinic elastosis and epithelial p53 and COX-2 expression.

BACKGROUND: Actinic cheilitis (AC) is characterized by epithelial and connective tissue alterations caused by ultraviolet sunlight overexposure known as photodamage. Fibroblasts have been linked to photodamage and tumor progression during skin carcinogenesis; however, their role in early lip carcinogenesis remains unknown. The aim of this study was to assess the density of fibroblasts in AC and normal lip (NL) samples and determine their association with markers of lip photodamage. METHODS: Fibroblasts, mast cells, p53, COX-2, and elastin were detected in NL (n = 20) and AC (n = 28) biopsies using immunohistochemistry/histochemistry. Mast cell and fibroblast density and epithelial p53 and COX-2 expression scores were then obtained. Elastosis was scored 1-4 according to elastin fiber density and tortuosity. RESULTS: Fibroblasts, mast cells, p53, COX-2, and elastosis were increased in AC as compared to NL (P < 0.001). Multivariate analysis showed an association between fibroblast and mast cell density at the papillary and reticular areas of AC and NL (P < 0.05). Papillary fibroblast density was also associated with epithelial p53 and COX-2 expression (P < 0.05). Increased fibroblast density, both papillary and reticular, was found in the high elastosis group (scores 3-4) as compared to the low elastosis group (scores 1-2) (P < 0.01). Increased reticular mast cell density was detected only in the high elastosis group (P < 0.01). CONCLUSIONS: Fibroblasts are increased in AC, and they are associated with mast cell density, epithelial p53 and COX-2 expression, and actinic elastosis. Therefore, fibroblasts may contribute to lip photodamage and could be considered useful markers of early lip carcinogenesis.

El género femenino como factor predictivo en los resultados de la endarterectomía carotídea / Female gender as a predictive factor in the outcome of carotid endarterectomy

Introducción: Existe evidencia contradictoria acerca del beneficio de la endarterectomía carotídea (EC) en la mujer. Objetivo: Evaluar si el género femenino afecta los resultados inmediatos y alejados de la EC. Material y método: Estudio retrospectivo de 346 EC realizadas entre Enero de 1990 y Julio de 2008 en el Hospital Guillermo Grant Benavente de Concepción. Del total, 137 EC fueron realizadas en mujeres. Como grupo control se consideró a los hombres operados en el mismo período, quienes presentaron características demográficas y otras variables potencialmente adversas en proporción similar a las mujeres. Todas las variables se analizaron en un estudio bivariado y multivariado. Se comparó la morbimortalidad operatoria AVC/muerte), la sobrevida global a 5 y 10 años, el intervalo libre de eventos neurológicos y de reestenosis a 5 años. Se utilizó el método de Kapplan-Meier para la sobrevida actuarial, el Test de Log Rank y Chi Cuadrado para la significación estadística y la regresión logística (Backward Stepwise) para el análisis multivariado. Los resultados alejados se expresan en sobrevida promedio + error estándar. Resultados: El género femenino no mostró ser una variable independiente negativa para los resultados de la EC. La incidencia de AVC/muerte en las mujeres fue 1,5 por ciento.(hombres: 1,4 por ciento) (p= NS). La sobrevida global a 5 y 10 años fue 82,5 por ciento +/- 4,1 y 49,7 por ciento +/- 9,7, respectivamente (hombres: 73,5por ciento + 4,0 y 45 por ciento +/- 7,8) (p= NS). A 5 años, el intervalo libre de eventos neurológicos fue 97 por ciento +/- 1,8 (hombres: 98,3 por ciento +/- 1,0) (p= NS) y el de reestenosis fue 93,9 por ciento +/- 3,6 (hombres: 98,5 por ciento +/- 1,1) (p= NS). Conclusión: El género femenino no afecta los resultados de la EC por lo que no se debe considerar un factor predictivo adverso.

Background: The benefits of carotid endarterectomy (CE) in women have been questioned Aim: to evaluate whether female gender influences the results of CE Methods: 346 procedures of CE performed between January 1990 and July 2008 at Hospital Guillermo Grant Benavente in Concepcion were restrospectively analyzed. 137 CE were performed in women. Demographic characteristics were similar between males and females. A university and multi variate analysis including other adverse factors influencing the results of surgery was performed. Operative morbidity and mortality, global survival, neurologic events free survival and the re stenosis rate at 5 years were analyzed. Actuarial survival was analyzed by the Kapplan-Meir procedure using the Log-rank and Chi square tests; Backward stepwise logistic regression was used in multivariate analysis. Results: Female gender was not found to be an independent risk factor for poorer outcomes of CE. Stroke plus total death in woman was 1,5 percent, versus 1,4 percent in man (P=NS). Survival in woman at 5 and 10 years was 82,5 percent +/- 4,1 and 49,7 percent +/- 9,7, respectively, whereas in man it was 73,5 percent +/- 4,0 and 45 percent +/- 7,8) (p NS). At 5 years follow-up 97 percent +/- 1,8 of woman versus 98,3 percent +/- 1,0 of men were free of neurological events; free of having restenosis were 93,9 percent +/- 3,6 of woman versus 98,5 percent +/- 1,1 of man (p= NS). Conclusion: female gender did not result in poorer results following CE and, therefore, should not be considered an adverse predictive factor for this surgical procedure.

Trends in prevalence, awareness, treatment and control of hypertension in urban communities in Chile.

OBJECTIVES: To evaluate the changes experienced over 15 years in the prevalence, state of awareness, treatment and control of hypertension, in urban communities of the VIII Region of Chile. METHODOLOGY: In order to ensure an objective analysis in comparison of the indicators, the methodological design used in 1988 was replicated: a representative, non-institutionalized sample, considering age, gender and socio-economic level. Blood pressure was measured using mercury manometers during two visits carried out on different days. Hypertension criteria: systolic blood pressure>or=140 mmHg and/or diastolic blood pressure>or=90 mmHg, or patients under treatment. RESULTS: A sample of 8472 residents was obtained, based on the previously defined stratification. Hypertension prevalence increased from 18.6% in 1988 to 21.7% in 2004. This occurred in all age groups and in both genders. The state of awareness remained stable: 66.9% in 1988 and 66.6% in 2004. The state of treatment increased from 35.6% (1988) to 59.9% (2004), and the state of hypertension control from 7.5 to 30.7%, respectively. CONCLUSION: This study demonstrated an increase in hypertension prevalence from 1988 to 2004. Meanwhile the state of awareness remained stable but there was a significant increase in the state of treatment and control, which were in accordance with public policies and changes in antihypertensive treatment.

[Reproductive history of women consulting in emergency services in a southern region of Chile]. / Características reproductivas de las mujeres consultantes en servicios de urgencia general de la VIII Región.

BACKGROUND: The occurrence and timing of menstrual and reproductive events such as menarche, regularity of menses, births, maternal breastfeeding and menopause play an important role in a woman's life. AIM: To study the variability of reproductive live from menarche to menopause in different age groups in Chilean Caucasian and Mapuche aborigine females in a southern location of Chile. SUBJECTS AND METHODS: A questionnaire about reproductive history was answered by 502 women consulting in six general emergency rooms of different public hospitals of the 8th region of Chile, between May and September 2002. RESULTS: The median age at menarche was 12.8 years among adolescents and 13.7 years among older women (p <0.001). Fecundity rate was 5.2, 3.9 and 1.8 among older women, adults and young adults, respectively. Forty seven percent of adolescent had at least one child. The median age for natural menopause was 47 years. Eighty one percent of older women and 65% of adult women had given breastfeeding for more than six months. No statistical differences in reproductive characteristics were observed between Chilean Caucasians and Mapuche aborigines. CONCLUSIONS: Among these women, the age of menarche in younger women is similar to that of women from industrialized countries. Fecundity has been progressively decreasing. Menopause tends to occur sooner than in other geographical regions, probably due to the high number of surgical sterilizations in our population. Adolescent pregnancy still is a problem.

[Prevalence of symptoms associated with blood pressure in normal and hypertensive population]. / Prevalencia de síntomas habitualmente asociados a la hipertensión arterial en población normotensa e hipertensa.

BACKGROUND: High blood pressure should be symptomless. However, popular knowledge attributes some symptoms such as headache, epistaxis or dizziness to high blood pressure. AIM: To compare the prevalence of headache, epistaxis, subconjunctival hemorrhages and dizziness in people with normal or high blood pressure. SUBJECTS AND METHODS: A representative sample of an urban population in Chile was studied. Each subject with high blood pressure was paired with a non-related individual of the same sex and age. These subjects were interrogated about the presence of symptoms. RESULTS: One thousand forty eight subjects with high blood pressure (481 male) and 1052 individuals with normal pressure (483 male), were studied. In subjects with high or normal blood pressure, the prevalence of headache was 22 and 21.8% respectively, epistaxis was 11.6 and 11% respectively, dizziness was 7.4 and 7.6% respectively, tinnitus was 9.1 and 9.4% respectively and subconjunctival hemorrhage was 2.9 and 3.1% respectively (p = NS). CONCLUSIONS: No differences in the prevalence of symptoms, popularly attributed to hypertension, were observed between subjects with normal or high blood pressure.

Estudio del paciente con genitales ambiguos / Patients with ambiguous genitalia

El estudio de un paciente con genitales ambiguos, requiere por lo menos 3 etapas de estudio. En la primera se deben identificar las alteraciones genitales, los antecedentes gestacionales y heredofamiliares, realizar un cariotipo en sangre periférica o en fibroblastos, determinar los niveles séricos de 17-OH progesterona y testosterona y realizar un ultrasonido abdominal y pélvico. En la segunda etapa se realizan pruebas de estimulación para demostrar la función gonadal y se determinan acciones enzimáticas y características de receptores hormonales. En ocasiones es necesario realizar una laparoscopia o una laparotomía. La tercera etapa requiere la identificación de los genes y hormonas involucrados en el proceso de diferenciación sexual

¿Es la obesidad el resultado de un epigenotipo equivocado? / Is obesity the consequence of an inadequate epigenotype?

Los individuos con obesidad asociada a sobrenutrición, manifiestan características genotípicas que modifican diversas funciones: Ingesta de alimentos condicionada por el ingreso calórico, composición de los macronutrientes, patabilidad, y control neuroendócrino del hambre y la saciedad; asimismo muestran una disminución en el egreso calórico producido por el metabolismo basal, el efecto térmico de los alimentos, el gasto calórico en ejercicio y la regulación de la termogénesis en situaciones de estrés. Existen además diferencias en la velocidad de oxidación de los nutrientes, tanto para cubrir las necesidades energéticas como para mantener la forma y la función. Es probable que muchos obesos, por seleción natural, presenten diferncias funcionales, algunas ocacionadas por mutaciones géneticas, que desde el punto de vista filogenético hayan facilitado la supervivencia de poblaciones nómadas y cazadoras con consumos alimentarios irregulares e inconstantes, pero que en la actualidad no sólo son innecesarias, sino que su asociación con sobrenutrición aumenta la morbimortalidad

Hiperplasia papilomatosa inflamatoria: aspectos clínicos, histopatológicos y terapéuticos / Inflammatory papillomatous hyperplasia: clinical, histopathological and therapeutic aspects

Este estudio fue realizado sobre la hiperplasia papilomatosa inflamatoria. El objetivo es descubrir la historia natural de la lesión, aspectos clínicos y microscópicos, además de sugerir los métodos terapéuticos y recomendaciones para prevenir la hiperplasia papilomatosa inflamatoria. Si el protesista ha practicado una disciplina preventiva para asegurar en lo posible la preservación de los tejidos remanentes, la adecuada actitud del paciente es muy necesaria para lograr este fin. La hiperplasia papilomatosa inflamatoria es una lesión benigna del paladar duro, que se observa frecuentemente en pacientes con historia de dentaduras inestables, pobre higiene bucal, hipersensibilidad a los materiales de base, el uso continuo de la dentadura, factores sistémicos e infecciones por Cándida albicans. El diagnóstico temprano de la lesión es esencial para aseegurar una adecuada terapia. El mejor tratamiento es la remoción quirúrgica. El pronóstico es excelente una vez que la lesión ha sido removida