ECONOMIC VALUE OF THE CARBON SINK SERVICES OF TROPICAL SECONDARY FORESTS AND ITS MANAGEMENT IMPLICATIONS

This paper explores the economic feasibility secondary forest regeneration and conservation as an alternative to help address global warming. Detailed measurements of tropical secondary forests through time, in different ecological zones of Costa Rica, are used for estimating carbon storage models. The paper addresses key issues in the international discussion about cross- and within-country compensation for carbon storage services and illustrates a method to compute/predict their economic value through time under a variety of scenarios. The procedure is applicable to other developing countries where secondary forest growth is increasingly important.Tropical Forests, Carbon Sequestration, Global Warming, Activities Implemented Jointly., Environmental Economics and Policy, Resource /Energy Economics and Policy, Q23, Q25, Q28.,

The Potential of Collective Behavior in Improving Sustainability of Seaweeds Value Chain in the Philippines

Seaweed farming has been a major source of income for fisherfolks in the Philippines. The farms’ generally small production volume essentially limits the value chain potential. The low output of the farmers confines them to marketing their seaweeds to the small traders who do not have minimum volume requirements despite lower buying prices compared to bigger traders and deductions imposed for farmers who borrowed capital for farm inputs. The emergence of collective behavior is, however, breaking through the traditional value chain of seaweeds. This paper thus capitalized on value chain analysis in an attempt to examine the potential of cooperativism in upgrading the seaweeds value chain in Agutaya, Palawan, and in Talibon, Bohol. Data were collected using rapid appraisal techniques within the value chain framework where market maps, value chain analysis, and upgrading strategies were developed. The study exhibits that with the collective behavior of farmers, the conventional, relatively long seaweeds value chain that passes through multiple traders from farmers to carrageenan processors has been transformed to a much straightforward chain of farmer groups to processors. Accordingly, the estimation of value added reveals that the distribution of value added across segments is more equitable in the new value chain structure. Cooperativism improves bargaining power. This offers an advantageous position for farmers, translating to significant adjustments in profits that enables them to repay debts and gain freedom to scout for other market options. Therefore, this signifies that cooperativism is promising for the sustainability of seaweeds value chain, particularly in the aspect of production

Crystallization and preliminary X-ray diffraction analysis of levansucrase (LsdA) from Gluconacetobacter diazotrophicus SRT4

The endophytic bacterium Gluconacetobacter diazotrophicus SRT4 secretes a constitutively expressed levansucrase (LsdA; EC 2.4.1.10), which converts sucrose to fructo-oligosaccharides and levan. Fully active LsdA was purified to high homogeneity by non-denaturing reversed-phase HPLC and was crystallized at room temperature by the hanging-drop vapour-diffusion method using ammonium sulfate and ethanol as precipitants. The crystals are extremely sensitive, but native data have been collected to 2.5 A under cryogenic conditions using synchrotron radiation. LsdA crystals belong to the orthorhombic space group P22(1)2(1) or P2(1)2(1)2, with unit-cell parameters a = 53.80, b = 119.39, c = 215.10 A

Peritoneal dialysis associated-peritonitis: a preventable complication

Peritoneal dialysis is useful renal replacement therapy for patients with end-stage chronic kidney disease. Latin America has 30% of the world population in peritoneal dialysis and within these countries Mexico covers 73% of them. In our country, the Mexican institute of social security (IMSS by its Spanish acronym) serves more than half of the Mexican population that requires renal replacement therapy. In 2014 it represented 15% of total annual cost of the institution. Peritonitis in peritoneal dialysis is the main complication seen in this renal replacement therapy with morbidity and mortality from 2 to 6%. The epidemiology of peritonitis associated with peritoneal dialysis varies according to the continent, country and dialysis center. The rate of peritonitis per year of each center reflects their quality of care. The prevention, diagnosis and treatment of peritonitis impact in the quality of life of the patient, the success of renal replacement therapy, public health costs and associated mortality. This review addresses the epidemiology, diagnosis, treatment, and preventive measures of peritonitis, focused on the procedures for improving the standards of care

La educación universitaria: rendimiento académico, reprobación, mercado de trabajo y políticas públicas

“La educación universitaria: rendimiento académico, reprobación, mercado de trabajo y políticas públicas atiende varios retos y consigue distintos aportes en sus diferentes capítulos. Este libro propone una mirada general, nueva, aunque fincada en varias tradiciones articuladas, sobre la educación superior en nuestro país, en particular, en la educación profesional que se imparte en el Centro Universitario UAEM Valle de México, a través del Modelo de Innovación Curricular, el cual contempla, dentro de sus objetivos, un marco estructural sistémico basado en planes educativos flexibles, con sistemas de créditos para la promoción, permanencia y egreso del alumno, y la decisión de éste sobre su propio proceso de formación.”Universidad Autónoma del Estado de México

La prospectiva como marco de análisis para el aprovechamiento turístico de los hongos comestibles silvestres (HCS) en el centro de México

Los hongos comestibles silvestres (HCS) han sido aprovechados históricamente por las comunidades forestales, pues constituyen un componente fundamental de su cultura alimentaria y un recurso estratégico de subsistencia. Además, representan una oportunidad para la diversificación productiva local a partir del impulso del turismo rural orientado al micoturismo. Por este motivo, se delinea un marco de análisis teórico metodológico desde el enfoque de prospectiva. Como procedimiento metodológico se realizó una revisión de literatura del micoturismo y de los HCS en revistas científicas. Como resultado se identificaron 48 variables que inciden en la conformación del sistema micoturístico y que son una aproximación para generar escenarios futuros del aprovechamiento recreativo de los hongos comestibles silvestres.CONACYT- Universidad Autónoma del Estado de Méxic

Ancho de distribución plaquetaría como predictor de preeclampsia severa

Introduction: The pathophysiology of preeclampsia is notcompletely elucidated. Different platelet indices, including theplatelet distribution width (PDW), could be used to predict theseverity of this condition.Objective: To analyze the behavior of PDW in the severitydevelopment of preeclampsia in women treated in thematernal-fetal medicine unit of Hospital Simón Bolívar inBogotá, Colombia.Materials and methods: This is an analytical cross-sectionalstudy in 105 patients with hypertensive disorder associatedwith pregnancy, preeclampsia and severe preeclampsia. Weanalyzed the behavior of PDW in a population of hypertensivewomen with preeclampsia using a curve of analysis ‘’ ReceiverOperating Characteristic ‘’ (ROC) to estimate the sensitivity,false positive rate, positive and negative likelihood ratio of thetest as a marker of development of severityResults: PDW had a higher significant increase inpatients where their disease progression developed severitycharacteristics. In the ROC curve, the area under the curve forPDW as a predictor of severity in preeclampsia was 0.68.Conclusion: PDW is a platelet index that increasedsignificantly in women with preeclampsia with severitycharacteristics. PDW could be a marker for the prediction ofseverity of preeclampsiaIntroducción: La fisiopatología de la preeclampsia no está dilucidada por completo, diferentes índices plaquetarios dentro de los que se incluye el ancho de distribución plaquetaria (ADP) podrían ser utilizado para predecir la severidad en esta condición. Objetivo: Analizar el comportamiento del ADP en el desarrollo de severidad en preeclampsia en mujeres atendidas en la unidad de medicina materno-fetal del Hospital Simón Bolívar de Bogotá, Colombia. Materiales y métodos: Estudio de corte trasversal analítico en 105 pacientes con trastorno hipertensivo asociado al embarazo, preeclampsia y preeclampsia severa. Se analizó el comportamiento del ADP en una población de mujeres hipertensas con preeclampsia mediante una curva de análisis ''Receiver Operating Characteristic'' (ROC) para estimar la sensibilidad, tasa de falsos positivos, razón de probabilidad positiva y negativa de la prueba como marcador de desarrollo de severidad Resultados: El ADP tuvo un ascenso significativo mayor en pacientes donde su progresión de enfermedad desarrollaron características de severidad. En la curva ROC el área bajo la curva para del ADP como predictor de severidad en la preeclampsia fué de 0.68 Conclusión: El ADP es un índice plaquetario que aumentó significativamente en las mujeres con preeclampsia con características de severidad. El ADP podría ser un marcador para la predicción de severidad de la preeclampsia

Ancho de distribución plaquetaría como predictor de preeclampsia severa

Introduction: The pathophysiology of preeclampsia is notcompletely elucidated. Different platelet indices, including theplatelet distribution width (PDW), could be used to predict theseverity of this condition.Objective: To analyze the behavior of PDW in the severitydevelopment of preeclampsia in women treated in thematernal-fetal medicine unit of Hospital Simón Bolívar inBogotá, Colombia.Materials and methods: This is an analytical cross-sectionalstudy in 105 patients with hypertensive disorder associatedwith pregnancy, preeclampsia and severe preeclampsia. Weanalyzed the behavior of PDW in a population of hypertensivewomen with preeclampsia using a curve of analysis ‘’ ReceiverOperating Characteristic ‘’ (ROC) to estimate the sensitivity,false positive rate, positive and negative likelihood ratio of thetest as a marker of development of severityResults: PDW had a higher significant increase inpatients where their disease progression developed severitycharacteristics. In the ROC curve, the area under the curve forPDW as a predictor of severity in preeclampsia was 0.68.Conclusion: PDW is a platelet index that increasedsignificantly in women with preeclampsia with severitycharacteristics. PDW could be a marker for the prediction ofseverity of preeclampsiaIntroducción: La fisiopatología de la preeclampsia no está dilucidada por completo, diferentes índices plaquetarios dentro de los que se incluye el ancho de distribución plaquetaria (ADP) podrían ser utilizado para predecir la severidad en esta condición. Objetivo: Analizar el comportamiento del ADP en el desarrollo de severidad en preeclampsia en mujeres atendidas en la unidad de medicina materno-fetal del Hospital Simón Bolívar de Bogotá, Colombia. Materiales y métodos: Estudio de corte trasversal analítico en 105 pacientes con trastorno hipertensivo asociado al embarazo, preeclampsia y preeclampsia severa. Se analizó el comportamiento del ADP en una población de mujeres hipertensas con preeclampsia mediante una curva de análisis ''Receiver Operating Characteristic'' (ROC) para estimar la sensibilidad, tasa de falsos positivos, razón de probabilidad positiva y negativa de la prueba como marcador de desarrollo de severidad Resultados: El ADP tuvo un ascenso significativo mayor en pacientes donde su progresión de enfermedad desarrollaron características de severidad. En la curva ROC el área bajo la curva para del ADP como predictor de severidad en la preeclampsia fué de 0.68 Conclusión: El ADP es un índice plaquetario que aumentó significativamente en las mujeres con preeclampsia con características de severidad. El ADP podría ser un marcador para la predicción de severidad de la preeclampsia

Neurilemoma quístico del nervio ciático: reporte de caso

Cystic neurilemmoma from sciatic nerve: case reportForma de citar: Sandoval Martinez Dk, Ortis Montañez LJ, García Ramírez CA. Neurilemoma quístico del nervio ciático: reporte de caso. rev.univ.ind.santander.salud 2013; 45 (3): 81-85RESUMENEl schwannoma benigno o neurilemoma, forma parte del grupo de las neoplasias benignas de origen neural. Se reporta un caso de un paciente con masa en región postero-lateral del muslo derecho que provoca dolor neuropático y hallazgo de masa quística en los estudios imagenológicos, con impresión diagnóstica de tumor de tejidos blandos. Al examen anátomo-patológico se hace diagnóstico de neurilemoma benigno clásico (Schwannoma) con degeneración quística, lo cual corresponde a una presentación poco común. Su diagnóstico defnitivo requirió  análisis histopatológico, sin necesidad de inmunohistoquímica.Palabras clave: Schwannoma, Neurilemoma, quiste, Nervio CiáticoABSTRACTBenign schwannoma or neurilemmoma, belongs to the group of benign neural origin neoplasms. The case of a patient with a mass of the thigh posterior-lateral region  that produces neurophatic pain found at imagenological studies was reported, the differential diagnose was as a soft tissue tumor. Classic benign neurilemmoma (Schwannoma) with cystic degeneration diagnosis was made at anatomo-pathological examination, which corresponds to an unusual presentation. Its defnitive diagnosis was by histopathological analysis, without using immunohistochemistry.Keywords:  Schwannoma, Neurilemmoma, cystic, sciatic nerve

Neurilemoma quístico del nervio ciático: reporte de caso

Cystic neurilemmoma from sciatic nerve: case reportForma de citar: Sandoval Martinez Dk, Ortis Montañez LJ, García Ramírez CA. Neurilemoma quístico del nervio ciático: reporte de caso. rev.univ.ind.santander.salud 2013; 45 (3): 81-85RESUMENEl schwannoma benigno o neurilemoma, forma parte del grupo de las neoplasias benignas de origen neural. Se reporta un caso de un paciente con masa en región postero-lateral del muslo derecho que provoca dolor neuropático y hallazgo de masa quística en los estudios imagenológicos, con impresión diagnóstica de tumor de tejidos blandos. Al examen anátomo-patológico se hace diagnóstico de neurilemoma benigno clásico (Schwannoma) con degeneración quística, lo cual corresponde a una presentación poco común. Su diagnóstico defnitivo requirió  análisis histopatológico, sin necesidad de inmunohistoquímica.Palabras clave: Schwannoma, Neurilemoma, quiste, Nervio CiáticoABSTRACTBenign schwannoma or neurilemmoma, belongs to the group of benign neural origin neoplasms. The case of a patient with a mass of the thigh posterior-lateral region  that produces neurophatic pain found at imagenological studies was reported, the differential diagnose was as a soft tissue tumor. Classic benign neurilemmoma (Schwannoma) with cystic degeneration diagnosis was made at anatomo-pathological examination, which corresponds to an unusual presentation. Its defnitive diagnosis was by histopathological analysis, without using immunohistochemistry.Keywords:  Schwannoma, Neurilemmoma, cystic, sciatic nerve