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297.912  Articles
1 of 29.792 pages  |  10  records  |  more records»
Binary Ni-Co compounds, namely oxyhydroxides and cobaltates of nickel, are promising active compounds for supercapacitors. The characteristics of binary Ni-Co oxyhydroxides synthesized using the method of high-temperature two-stage synthesis with hot and ... see more

The two-stage 6-8 multi-anvil (MA8) apparatus is an important large-volume, high-pressure technique that has been widely used in the high pressure mineralogy and material synthesis, mainly at room temperature or above. Recently, we have successfully devel... see more

The distribution and abundance of emperor fishes (Lethrinidae) along the Arabian Sea  coast of Oman were analysed from commercial catch-per-unit-effort data for the periods 1996–2004 and 2005,  respectively. Two-stage generalized additive models... see more

The possibility of using the wastes of the oil and fat industry – phosphatide concentrates as components of lubricating materials was demonstrated in this paper. At the first stage, amidation of phosphatide concentrate from the purification of rapeseed oi... see more

Intermittent hydrothermal treatment was introduced into the synthesis of SAPO-34 molecular sieves to control the nucleation and the growth in the crystallization. The effect of the crystallization time, the order of long-time and short-time crystallizatio... see more

Valoración cualitativa sobre la “sensación térmica” en aulas del edificio de Premédico de la Escuela Latinoamericana de Medicina / Qualitative assessment on the “thermal sensation” in the building’s classrooms Premedic of the Latin American School of Medi Valoración cualitativa sobre la “sensación térmica” en aulas del edificio de Premédico de la Escuela Latinoamericana de Medicina / Qualitative assessment on the “thermal sensation” in the building’s classrooms Premedic of the Latin American School of MediObjetivo: valorar cualitativamente el rango de la sensación térmica durante los horarios docentes en las aulas seleccionadas del edificio de Premédico de la Escuela Latinoamericana de Medicina en días con condiciones climáticas características.Métodos: para la determinación de los valores aproximados de la “sensación térmica” en las aulas seleccionadas, se tomaron los datos de la temperatura del aire, humedad relativa y velocidad del viento dentro del local, medidos a las 7:30 a.m y 1:00 p.m, respectivamente en días húmedos de verano correspondientes al mes de junio de 2017. Se consideró a priori que ambos horarios eran representativos de los momentos más fríos y cálidos del día. Se realizó revisión de documentos, análisis y síntesis e inducción y deducción sistematización. Resultados: se efectuaron valoraciones cualitativas de la ventilación natural, y aproximadas de las temperaturas y humedad del aire en las aulas PM-II-1, PM-II-9, PM-II-10, PM-II-11, PM-II-12, PM-II-13 y PM-II-14, en días húmedos de verano cuya temperatura ambiente era de 290C - 340C y la humedad rela-tiva entre el 90% y 95%, correspondientes al mes de junio, en dos horarios: 7:30 a.m y 1:00 p.m. A partir de las valoraciones obtenidas se determinó la temperatura de sensación que mostró valores por encima de los 500C.Conclusiones: en días de condiciones climáticas características de alta humedad y temperatura, la sensación térmica en los locales estudiados alcanza los valores descritos por la literatura especializada como peligrosos para la salud de las personas. Palabras clave: sensación térmica; temperatura de sensación; aulas calurosas.ABSTRACT Objective: to assess qualitatively the range of the thermal sensation during teaching hours in selected classrooms of the Premedic building of the Latin American School of Medicine on days with characteristic climatic conditions.Methods: for the determination of the approximate values of the “thermal sensation” in the selected classrooms, the data of the air temperature, relative humidity and wind speed inside the premises were taken, measured at 7:30 a.m and 1:00 p.m, respectively on humid summer days corresponding to the month of June 2017. It was considered a priori that both schedules were representative of the coldest and hottest times of the day. A review of documents, analysis and synthesis, induction, systematization deduction was carried out.Results: qualitative assessments of natural ventilation were made, and approximate of air temperatures and humidity in rooms PM-II-1, PM-II-9, PM-II-10, PM-II-11, PM-II -12, PM-II-13 and PM-II-14, on humid summer days whose ambient temperature was 290C - 340C and the relative humidity between 90% and 95%, corresponding to the month of june, in two opening hours: 7:30 a.m and 1:00 p.m. From the obtained valuations the temperature of sensation that showed values over 500C was determined.Conclusions: in days of climatic conditions characteristic of high humidity and temperature, the thermal sensation in the studied premises reaches the values described by the specialized literature as dangerous for the health of people. Keywords: thermal sensation; sensation temperature; warm classrooms.

ABSTRACT Objective: to assess qualitatively the range of the thermal sensation during teaching hours in selected classrooms of the Premedic building of the Latin American School of Medicine on days with characteristic climatic conditions.Methods: for the ... see more

Nuclear energy presents key challenges to be successful as a sustainable energy source. Currently, the viability of the use thorium-based fuel cycles in an innovative nuclear energy generation system is being investigated in order to solve these key chall... see more

Recently, two-dimensional (2D) charge density wave (CDW) materials have attracted extensive interest due to potential applications as high performance functional nanomaterials. As other 2D materials, 2D CDW materials are layered materials with strong in-p... see more

In this work, we obtained polycalciumphenylsiloxane (PCPS) by the interaction of calcium bis (acetylacetonate) with polyphenylsiloxane. The first method consisted in boiling the starting reagents in toluene for several hours; the second was as follows: th... see more

1 of 29.792 pages  |  10  records  |  more records»