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Se determinó la bioacumulación de Arsénico III (As III) en la microalga Chlorella vulgaris en muestras de efluentes de Parque Industrial Río Seco (PIRS), a escala de laboratorio, para ello mediante diluciones sucesivas se obtuvo el cultivo puro de la microalga de efluentes de la planta de tratamiento de Chilpina, se evaluó la resistencia mediante el crecimiento de C. vulgaris, en matraces de 250 mL con la aplicación de As III en forma de Na HAsO La capacidad de 2 3. bioacumulación de As de C. vulgaris de efluentes del PIRS, se evaluó mediante la concentración de clorofila “a” y mediante la concentración residual de As después de someter a las muestras de -1efluentes a velocidades de flujo de 20, 40 y 80 mL·min en un sistema de flujo por gravedad. La evaluación de la toxicidad se realizó para la muestra de efluente que presentó la menor concentración residual de As en ...

Objective: Synovial sarcomas are tumors of mesenchymal origin that can arise anywhere in the body. Sarcomas of the head and neck are uncommon, accounting for approximately 1 % of all malignant neoplasms in this location. It is a therapeutic challenge both for surgical resection and radiation therapy, given the morbidity and risk of injury to the structures adjacent to the tumor. The purpose of our case series is to share the experience of four patients treated with radiotherapy at Instituto Nacional de Cancerología, making a correlation of clinical, imaging, and histopathological presentation and the response to treatment. Methods: Four patients with a histologically confirmed diagnosis of synovial sarcoma of the head and neck treated with radiation therapy are described, emphasizing local control and treatment-associated morbidity reported on medical records. Results: Patients were bet...

OBJECTIVE. To predict intrauterine fetal pulmonary maturity through certain ultrasound parameters in order to avoid potential risks inherent to invasive and more expensive procedures, like amniocentesis and phospholipids determination. METHOD. Clinical and experimental study to determine hoth predictive value and sensitivity of this diagnostic procedure. RESULTS. Prospective study of 5O non-diabetic and non-Rb sensitized high-risk pregnant women with delivery before 48 hours from the last ultrasound control; evaluation of perinatal result. Ten cases were preterm pregnancies, gestational age was 30 to 38 weeks at delivery. Best correlation with pulmonary maturity were the following: placenta grade III, distal femoral and proximal tibial epiphysis 11 cm, presence of proximal humerus epiphysis, renal length above 40 mm, lung/liver ultrasound relation above 1, intestinal status 3 or 4 and co...

En esta investigación se sintetizaron películas de ZnO dopadas con Au, a través del método sol-gel; evaluando el efecto del porcentaje molar (3, 5 y 7%) de dopante y de la temperatura de recocido (400, 500 y 600°C) sobre las propiedades estructurales, de absorbancia, de sensibilidad a los gases H2 y CO, y eléctricas. Las mediciones de difracción de rayos X y la intensidad de las bandas de absorción ultravioleta-visible evidencian que, con el método utilizado, las películas delgadas de ZnO presentan la fase wurtzita. El aumento del porcentaje molar de Au disminuye el tamaño del cristal, mientras que la temperatura de recocido lo hace aumentar. Así también, con el incremento de Au y de la temperatura de recocido, disminuye el ancho de la banda prohibida y desplaza el pico del excitón hacia mayores energías. Con el aumento de porcentaje de dopante y de la temperatura de recoc...

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Se evaluó el efecto de la testosterona sobre las adherencias pene-prepuciales y producción de fibra. Se usaron 30 alpacas de 18 meses de edad, distribuidas al azar en tres grupos: machos sin tratamiento (T0), machos tratados con enantato de testosterona (0.5 mg/kg/peso vivo) cada dos semanas durante 12 semanas (T2E), y machos castrados (C0). Las adherencias pene-prepuciales, tamaño testicular, comportamiento sexual y peso corporal se evaluaron cada dos semanas, y muestras de fibra se recolectaron al inicio delestudio y al final de tres periodos experimentales. Se tuvo una fase pre-experimental de cuatro semanas donde se evaluaron los parámetros en estudio para ajustar los datos de la fase experimental. La liberación de las adherencias pene-prepuciales fue mayor en T2E que en T0 y C0 entre la semana 8 (p<0.001) y la semana 12 (0.006>p<0.001). El incremento testicular (largo,...

This article presents a general vision of the history of the university of San Marcos and exposes the institutional mechanisms across which it was granting academic degrees to the graduating students in fulfillment of a set of educational intentions raised between 1860 and 1928. The aim of the text is to reconstruct the role that fulfills the university in the society in a historical conjuncture and to revise the negative image left by the generations of Nine hundred and of the Centenary. Finally, it postulates a few brief reflections on the value of the graduation theses as historical documents and the use of contemporary historiography.

No presenta resumen.

No presenta resumen

The migration of creators from other platforms and the emergence of new lines of content are contributing to the thematic diversification of Twitch.tv beyond its leadership in gaming. This article explores the potential for collaboration, education, and creation of live-streaming platforms by analyzing the online coworking experience of the JaimeAltozano ‘working room’ on Twitch, launched after the outbreak of the Covid-19 pandemic. An initiative that gathered 222,172 hours worked by the community in three months. Using a mixed methods research design, the experience was studied on the basis of quantitative data, 67 in-depth interviews with users and ethnographic techniques for content analysis. The results obtained in the three phases of the research process show that experiences like the JaimeAltozano ‘working room’ are useful virtual spaces for productivity. Based on these res...

This article describes interaction among constitutional law, international law of human rights and family law based on human rights extensive role. In family law field, involving family model and constitutional protection, it is clear to notice the influence of permanent dialogue among those three areas becoming as the main factor of family law evolution. The author emphasizes the deep transformation experienced by “family” notion through history and in fact that change shall keep happening, which does not necessarily mean that all forms of living in family shall have the same level of legal coverage. However, it should result in a minimum level of protection marked by human rights recognition.

El surgimiento de nuevas tecnologías y el desarrollo del Internet hacen posible que la publicidad, a través de sus distintas modalidades, llegue a los consumidores de una manera más rápida y fácil; sin embargo, muchas veces este tipo de publicidad es considerada como publicidad encubierta o ilícita. Es así que, en el presente artículo, el autor se centrará en desarrollar las distintas modalidades publicitarias, como lo son por ejemplo el advergaming (publicidad en videojuegos) o la publicidad testimonial en redes sociales (como a través de tuits), con la finalidad de analizar el principio de autenticidad y su posible vulneración.

Un tema común entre las investigaciones sobre las economías indígenas amazónicas ha consistido en el cambio de su carácter ‘tradicional’ por procesos de inserción al mercado. El caso del pueblo Yánesha, que habita el valle del Palcazú, no ha sido la excepción. En este espacio, al desarrollo de la producción ganadera comercial y el establecimiento de tres grandes áreas naturales protegidas, le han seguido proyectos en torno a la sostenibilidad ambiental en los últimos 30 años. En esa línea, el presente ensayo pretende tomar una ruta distinta para la interpretación sobre el cambio económico y social de este pueblo. Basándose en la revisión de tres momentos históricos y en una salida de campo exploratoria, este texto atiende los cambios en los procesos productivos, y contempla modos de relacionamiento con la alteridad de las poblaciones indígenas amazónicas, caracte...

In this article, the author develops the problem ofs exist advertising and he sets out self-regulation as an alternative to sanction it. Along these lines, he introduces CONAR as an institution responsible for self-regulation within advertising, and he highlights the issuance of an objective criterion for evaluation and eventual sanction of sexist advertising, this within the framework of the validity of its Advertising Code of Ethics 2007, but after a series of modifications to regulatory framework, the author criticizes its lack of application, and he culminates affirming the advantages of an advertising self-regulation, represented through CONAR.

In the current online advertising market, economic operators seek to divert demand of consumers to their offers through programmatic advertising. One of the most persuasive and effective is Google Ads. In this article, we shall analyse whether the unauthorized use of third-party trademarks as keywords on “Google Ads” constitute an act of unfair competition or a trademark infringement.

This article describes interaction among constitutional law, international law of human rights and family law based on human rights extensive role. In family law field, involving family model and constitutional protection, it is clear to notice the influence of permanent dialogue among those three areas becoming as the main factor of family law evolution. The author emphasizes the deep transformation experienced by “family” notion through history and in fact that change shall keep happening, which does not necessarily mean that all forms of living in family shall have the same level of legal coverage. However, it should result in a minimum level of protection marked by human rights recognition.

A common theme among research on Amazonian indigenous economies has been the change of its 'traditional' character by processes of market insertion. The case of the Yánesha people, that inhabits the Palcazu valley, has not been the exception. In this space, the development of commercial livestock production and the establishment of three large protected natural areas have been followed by projects around environmental sustainability in the last 30 years. The present essay intends to take a different route for the interpretation on the economic and social change of this town. Based on the review of three historical moments, and an exploratory field trip, this text deals with the changes in the productive processes, contemplating ways of relating to the otherness of the indigenous Amazonian populations, characterized by a disposition of 'openness to the other'. In this way, the need to qu...

Objective. Synovial sarcomas are tumors of mesenchymal origin that can arise anywhere in the body. Sarcomas of the head and neck are uncommon, accounting for approximately 1 % of all malignant neoplasms in this location. It is a therapeutic challenge both for surgical resection and radiation therapy, given the morbidity and risk of injury to the structures adjacent to the tumor. The purpose of our case series is to share the experience of four patients treated with radiotherapy at Instituto Nacional de Cancerología, making a correlation of clinical, imaging, and histopathological presentation and the response to treatment. Methods. Four patients with a histologically confirmed diagnosis of synovial sarcoma of the head and neck treated with radiation therapy are described, emphasizing local control and treatment-associated morbidity reported on medical records. Results. Patients were bet...

Primary peritoneal serous carcinoma (PSC) is a rare, aggressive, malignant neoplasm that is usually diagnosed incidentally, after having excluded an ovarian primary. Another rare entity is uterine smooth muscle tumor of uncertain malignant potential (STUMP), which is a borderline pathology between leiomyomas and leiomyosarcomas. Its synchronism has not been reported in the literature. We present the case of a 50-year-old woman with a twelve-month illness characterized by progressive abdominal distention, pain, weight loss, and edema in the lower limbs. The patient underwent surgery for a uterine tumor, to rule out sarcoma, finding, in addition to the gynecological neoplasia, solid peritoneal lesions. The histological diagnosis was STUMP synchronous with CSP. The evolution was unfavorable, dying three weeks after surgery. In the literature we don’t find cases of coexistence of these pat...