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1
artículo
Peru’s Amazon rainforest is being destroyed because the timber industry only uses 3% of trees per hectare. Therefore, timber companies cannot be established in the forest, and 97% of trees are unused. These trees are eventually burned to clear land for formal and informal agriculture. This article proposes to use more trees given that records of the last 40 years show that all tree species can be used for some purpose if they are processed appropriately with simple sawmill and drying techniques. The analysis shows that if less than 7% of the available trees is used, it will be financially and economically feasible to establish primary industries in the forest itself. This creates permanent job positions and enables a sustainable use and renovation of the forest; thus ensuring the preservation of the Amazon rainforest, which does not allow growing any foreign tree species.
2
artículo
Peru’s Amazon rainforest is being destroyed because the timber industry only uses 3% of trees per hectare. Therefore, timber companies cannot be established in the forest, and 97% of trees are unused. These trees are eventually burned to clear land for formal and informal agriculture. This article proposes to use more trees given that records of the last 40 years show that all tree species can be used for some purpose if they are processed appropriately with simple sawmill and drying techniques. The analysis shows that if less than 7% of the available trees is used, it will be ?nancially and economically feasible to establish primary industries in the forest itself. This creates permanent job positions and enables a sustainable use and renovation of the forest; thus ensuring the preservation of the Amazon rainforest, which does not allow growing any foreign tree species.
3
artículo
Peru’s Amazon rainforest is being destroyed because the timber industry only uses 3% of trees per hectare. Therefore, timber companies cannot be established in the forest, and 97% of trees are unused. These trees are eventually burned to clear land for formal and informal agriculture. This article proposes to use more trees given that records of the last 40 years show that all tree species can be used for some purpose if they are processed appropriately with simple sawmill and drying techniques. The analysis shows that if less than 7% of the available trees is used, it will be financially and economically feasible to establish primary industries in the forest itself. This creates permanent job positions and enables a sustainable use and renovation of the forest; thus ensuring the preservation of the Amazon rainforest, which does not allow growing any foreign tree species.
4
artículo
Publicado 2017
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The Camaná-Mollendo Basin is an active-margin depression ~NW-SE elongated, which is located in the forearc of southern Perú and extends from the Coastal Cordillera to the Perú-Chile Trench. This basin consists of a grabens and half-graben complex, filled with deltaic and fluvial sedimentary rocks of the Oligocene-Pliocene Camaná Formation (~500 m thick). An integration of compiled onshore stratigraphic logs, reinterpreted 2D seismic offshore information, sediment provenance data, and previous zircon U-Pb geochronology on volcanic reworked ash supports a refined tectono-chronostratigraphic framework for the whole Camaná-Mollendo Basin fill. To complete this integration we needed firstly to elaborate a geological reinterpretation of seismic offshore data and highlight their most prominent features (i.e., erosive surfaces). This step allowed establishing a first correlation between ons...
5
artículo
Publicado 2017
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The Camaná-Mollendo Basin is an active-margin depression ~NW-SE elongated, which is located in the forearc of southern Perú and extends from the Coastal Cordillera to the Perú-Chile Trench. This basin consists of a grabens and half-graben complex, filled with deltaic and fluvial sedimentary rocks of the Oligocene-Pliocene Camaná Formation (~500 m thick). An integration of compiled onshore stratigraphic logs, reinterpreted 2D seismic offshore information, sediment provenance data, and previous zircon U-Pb geochronology on volcanic reworked ash supports a refined tectono-chronostratigraphic framework for the whole Camaná-Mollendo Basin fill. To complete this integration we needed firstly to elaborate a geological reinterpretation of seismic offshore data and highlight their most prominent features (i.e., erosive surfaces). This step allowed establishing a first correlation between ons...
6
artículo
Publicado 2025
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Introduction. Virtual obstetric psychoprophylaxis enhances prenatal care by improving maternal and neonatal health outcomes. Objectives. To evaluate virtual obstetric psychoprophylaxis and its association with maternal and perinatal outcomes. Methods. An observational, descriptive, and correlational study was conducted at the EsSalud Aurelio Díaz Ufano Hospital (Lima, Peru) from September 2020 to September 2021. A total of 132 nulliparous pregnant women without comorbidities were included, divided into two groups: 66 who received virtual psychoprophylaxis and 66 who did not. Non-probabilistic convenience sampling was applied. Data were collected from electronic medical records and labor ward logs. Statistical analysis was performed using SPSS v22, employing Pearson’s chi-square and Fisher’s exact test, with statistical significance set at p<0.05. Variables included sociodemograph...
7
artículo
Publicado 2025
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Introducción: La psicoprofilaxis obstétrica virtual optimiza el cuidado prenatal al mejorar la salud materna y neonatal. Objetivos: Evaluar la psicoprofilaxis obstétrica virtual y su asociación con resultados materno perinatales. Métodos: Estudio observacional, descriptivo y correlacional realizado en el Hospital EsSalud Aurelio Díaz Ufano (Lima, Perú) entre setiembre 2020 y setiembre 2021. Se incluyeron 132 gestantes nulíparas sin antecedentes mórbidos, distribuidas en dos grupos: 66 con psicoprofilaxis obstétrica virtual y 66 sin esta intervención. Se utilizó muestreo no probabilístico por conveniencia. Se recolectaron datos de historias clínicas y libros de sala de partos. Se empleó el software SPSS v22 para el análisis estadístico, aplicando pruebas chi-cuadrado y de Fisher, considerando significancia estadística con p<0,05. Las variables analizadas incluyeron c...
8
tesis de maestría
Publicado 2015
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El presente trabajo de investigación se realizó en el departamento de Loreto, provincia de Maynas, en los aserraderos que se encontraban en actividad, las mismas que recayeron en: Netrimac SAC, Raúl Oswaldo Oliveira García E.I.R.L, Zambito E.I.R.L.y Sico Maderas S.A.C. La información fue recolectada en los meses de Marzo - Abril del presente año. El estudio tuvo como finalidad cuantificar la generación residuos sólidos en los aserraderos de Iquitos y proponer alternativas de aprovechamiento con tecnologías limpias. Los resultados muestran que las cuatro empresas en estudio, presentan sus flujo de transformación de la madera en troza en madera aserrada de manera similar, tal como se describe: boya, aserrío principal, reaserrado, canteando, despuntado, preservado, secado y almacenamiento. 204 personas laboran en los aserraderos, tres son profesionales con 0.75 (1.29 %) por aserr...
9
tesis de grado
Publicado 2024
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El objetivo del estudio fue describir el conocimiento sobre la exposición a los accidentes por la araña casera (Loxosceles laeta) y los casos de loxoscelismo notificados en el departamento de Lima durante el 2022. La información del conocimiento fue extraída de la Encuesta Nacional de Programas Presupuestales 2022, identificando como variables: a) reconocimiento de la araña como venenosa, b) lugares donde se esconde, c) síntomas, d) acciones ante un accidente y (e) formas de evitar la mordedura. La información de los casos fue tomada del Centro Nacional de Epidemiología, Prevención y Control de Enfermedades. Se utilizó la correlación de Spearman para determinar la asociación entre el conocimiento y la tasa de incidencia (TI). Con relación al conocimiento, 58.2% de los encuestados reconocieron a la araña como venenosa, los lugares de escondite más señalados fueron los rinc...
10
artículo
Deforestation of flooded (várzea) and non-flooded (terra firme) forests caused by firewood consumption at tile factories (olaria) was investigated in Abaetetuba Island at the Amazon estuary. Várzea is spatially limited, the area is only 3% of the whole Amazon, however, it is heavily influenced by human activities, especially by the cultivation of acaí palm (Euterpe oleracea Mart.). The trees are cut down for the olarias. The number of tree species are small, and they have less wood density than terra firme tree species because the várzea is flooded twice a day throughout the year. Terra firme forests, which are also secondary forests, receive less human impact, and have more tree species and more individual trees with a growth extension that exceeds the species in the várzea forests. The deforestation was examined by comparing forest biomass in a unit area to firewood consumption at...
11
tesis de grado
Publicado 2016
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The diabetic maculopathy is the pathophysiological consequence of VEGF action. The use of anti-VEGF (Bevacizumab) intravitreal has demonstrated efficacy and safety. Objectives: To determine the effect of treatment with anti-VEGF (Bevacizumab) intravitreal on visual acuity in patients with diabetic maculopathy. Method: A case-control study was conducted. The population are patients with diabetic maculopathy. Patients found improvement in visual acuity (logMAR delta greater than or equal to 0.3) and no improvement in visual acuity (delta less than 0.3 logMAR). Medical records were reviewed and cases (n = 50) who were treated with intravitreal injection of 1 or more doses of Bevacizumab and controls (n = 50), who they did not receive Bevacizumab (other treatments) were identified. Descriptive statistics, chi-square test of association and Z test for proportions was used. Results: 58 men and...
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objeto de conferencia
Previous studies have demonstrated that attenuation coefficients can be useful towards characterizing thyroid tissues. In this work, ultrasonic attenuation coefficients were estimated from healthy human thyroids in vivo using a clinical scanner. The selected subjects were five young, healthy volunteers (age: 26 ± 6 years old, gender: three females, two males) with no reported history of thyroid diseases, no palpable thyroid nodules, no smoking habits, and body mass index less than 30 kg/m2. Echographic examinations were conducted by a trained sonographer using a SonixTouch system (Ultrasonix Medical Corporation, Richmond, BC) equipped with an L14-5 linear transducer array (nominal center frequency of 10 MHz, transducer footprint of 3.8 cm). Radiofrequency data corresponding to the collected echographic images in both transverse and longitudinal views were digitized at a sampling rate of...
13
objeto de conferencia
Publicado 1998
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Trabajo presentado en el Workshop on Carbon Pools and Dynamics of Tropical Ecosystems, Belem, Brazil. Del 1 al 5 de diciembre, 1997.
14
informe técnico
Publicado 2021
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The liquid product obtained from tire pyrolysis process, called tire pyrolysis oil (TPO), has a great attraction as an alternative fuel, as it has a viscosity of 5.43 cSt (Sharma et al., 2016), density of 921 kg/m³ (Gamboa et al., 2020), surface tension of 0.028 N/m (Chumpitaz et al., 2019), and higher heating value of 46.32 MJ/kg (Das et al., 2017), which are similar to diesel oil. These physical and chemical properties have motivated research into its application in furnaces, boilers and compression ignition engines. Generally, TPO is blended with diesel or biodiesel in order to decrease the percentage of sulfur and improve the cetane number of the fuel blend (Sharma et al., 2016). However, the evaluation of the quality and applicability of TPO has been focused mainly on combustion emissions and the performance of thermal equipment fueled with this fuel (and diesel/biodiesel blends), ...
15
informe técnico
Publicado 2021
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The liquid product obtained from tire pyrolysis process, called tire pyrolysis oil (TPO), has a great attraction as an alternative fuel, as it has a viscosity of 5.43 cSt (Sharma et al., 2016), density of 921 kg/m³ (Gamboa et al., 2020), surface tension of 0.028 N/m (Chumpitaz et al., 2019), and higher heating value of 46.32 MJ/kg (Das et al., 2017), which are similar to diesel oil. These physical and chemical properties have motivated research into its application in furnaces, boilers and compression ignition engines. Generally, TPO is blended with diesel or biodiesel in order to decrease the percentage of sulfur and improve the cetane number of the fuel blend (Sharma et al., 2016). However, the evaluation of the quality and applicability of TPO has been focused mainly on combustion emissions and the performance of thermal equipment fueled with this fuel (and diesel/biodiesel blends), ...
16
artículo
Publicado 2015
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En este artículo presentamos una actualización del estado de conservación del “cortarramas peruano”, indicando su escasa presencia dentro del área de distribución de la especie y sus amenazas. Desde Tumbes hasta Ancash se han identificado solo seis lugares donde existen poblaciones de más de 10 individuos y tres sitios en los que se reproduce. Los resultados indican que en total la población actual sería inferior a 500 individuos. Estos sitios contienen especies de flora representativa del matorral desértico peruano, varias de las cuales están amenazadas. Los sitios son muy pequeños (entre 5 y 150 ha), están muy fragmentados y se encuentran en inminente peligro de destrucción debido a la expansión urbana y agrícola, tala ilegal, sobre pastoreo e introducción de especies vegetales exóticas.
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artículo
Publicado 2015
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In this article, we present an update on the conservation statuts of the Peruvian Plantcutter. We find little presence of the species within its distribution area we catalog threats to the remaining populations. From Tumbes to Ancash only six sites have been identified with populations of more than 10 individuals and only three sites where the species is known to reproduce. Results indicate that the current total population is less than 500 individuals. These sites where the species is found contain floral species typical of the Peruvian desert scrub, several of which are threatened. Sites are very small (between 5 to 150 ha), highly fragmented and are under immediate threat of destruction due to agriculture, urban expansion, illegal logging, livestock foraging, and the introduction of exotic plant species.
18
tesis de grado
Publicado 2024
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Demostrar si el tamaño tumoral mayor de 5 cm es un factor pronóstico para la disminución de sobrevida actuarial de los pacientes con sarcoma primario de mama. Materiales y métodos: Estudio de casos y controles anidado a cohorte, donde se incluyó 20 historias clínicas de pacientes adultas con diagnóstico de sarcoma primario de mama entre los años 2010 al 2020, de los cuales se dividió en 2 grupos: 13 con tamaño tumoral mayor igual a 5 cm y 7 con tamaño tumoral menor a 5 centímetros. Las pruebas estadísticas fueron Regresión de Cox, test de Log rank, prueba de t Student y la prueba de Fisher. Resultados: Los pacientes con sarcoma primario de cáncer de mama con un tamaño tumoral menor a 5 cm tuvieron una sobrevida de 51.7 semanas, mientras que la sobrevida de los pacientes con sarcoma primario de cáncer de mama con un tamaño tumoral mayor a 5 cm fue de 95.6 semanas, estad...
19
tesis de grado
Publicado 2024
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La Comunidad Nativa de Tres Islas experimentó alteraciones debido a actividades de tala y minería que se realizaban dentro de su territorio, lo que resultó en la degradación del medio ambiente y un aumento en la criminalidad. El problema principal en el fallo que se está analizando es si la decisión de la Corte Superior de anular los actos administrativos inconsultos infringe los derechos y garantías de los administrados. Los problemas secundarios incluyen la aplicabilidad de la consulta previa en Perú, los derechos colectivos de los pueblos indígenas que podrían haber sido afectados y los derechos de los administrados que podrían haber sido violados. Así como la proporcionalidad de la anulación de los actos administrativos. Se destaca el derecho en discusión es un derecho fundamental. Sin embargo, la decisión de la Corte Superior de anular los actos administrativos, prote...
20
artículo
Publicado 2022
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Objective. The purpose of this study is to determine the prognostic value of the absolute decrease in the N-terminal portion of pro-B-type natriuretic peptide (NT-proBNP) to prevent fewer clinical events, in the population of CLUSTER-HF (efficacy of ultrasound lung to guide therapy and prevent readmissions in heart failure). Materials and methods. This study was conducted in a subgroup of ninety-four patients with available NT-proBNP information at hospital discharge and prior to randomization in the CLUSTER-HF study. The primary objective of the study was to determine the prognostic value of absolute NT-proBNP decline below which fewer events of all-cause death, emergency room visits, and rehospitalization for heart failure at 180 days. Results. The absolute decrease in NT-proBNP below 3,350 pg/mL has a moderate discriminative capacity with AUC= 0.602, with a prognostic value in the com...
