Mechanical properties related to use of glass waste as a raw material in porcelain stoneware tile mixtures

Porcelain represents one of the most complex ceramics, formulated from a mix of clay, feldspar and quartz are sintered to conform a glass-ceramic composite. Porcelain stoneware tile has excellent technical characteristics. Nowadays, research of new materials, for example non-hazardous wastes, that are able to replace the traditional fluxing agent with out changing the process or quality of the final products has been realized. The aim of this work is to study the possibility of the use of glass powder waste, in ceramic mixtures, for manufacturing of porcelain stoneware tiles. It was prepared by mixtures containing different amount of fireclay, glass waste, feldspar and quartz. The samples were fired reaching different maximum temperatures in the range 900-12000 C, with a soaking time of 1 hour. The fired samples were characterized and the use of small amounts of glass powder in addition with feldspar and quartz showed good results of mechanical technological properties. The 10F5Q5G was the only product that can be classified as a porcelain stoneware tile due to its properties

Measurement of Natural Radioactivity in Porcelain Stoneware Tiles

This paper presents the results of the measurement of natural radio activity present in the Porcelain stoneware tiles samples collected from the ceramic firms of Government Ceramic institute, Virudhachalam.  Natural radioactivity in the porcelain stoneware tiles samples in mainly due to 226Ra, 232Th and 40K and their daughter products.  In this study, these measurements have been estimated in Gamma-ray spectrometry and their levels for six samples are compared and also the Radium equivalent concentration (Raeq) is calculated. The gamma index is calculated and compared well with the reported values

Preparation and characterisation of Nylon/PEG/PAN composite membrane for liquid filtration

A novel method has been proposed to prepare a Nylon/PEG/PAN composite membrane for the improvement of electrospun PAN fibre properties and filtration efficiency. Polyacrylonitrile fibre has been prepared by electrospinning technique. Different proportions of blended mixture of Nylon and PEG are prepared separately. Blended mixture of Nylon and PEG is poured over the electrospun PAN to prepare a Nylon/PEG/PAN composite membrane. The prepared Nylon/PEG/PAN composite membrane and Nylon/PEG membrane are characterized by using optical microscope, porosimeter, X-ray diffractometer and thermogravimetric analysis. Filtration efficiency of the prepared Nylon/PEG/PAN composite membrane is studied using pure water flux and oil water emulsion methods. The 50/50 proportion of Nylon and PEG has been identified for getting uniform and evenly distributed pores and also it shows around 80% of solute rejection, whereas 60/40 proportion shows little bit higher percentage due to higher proportion of Nylon. Thus, the pure water flux of 60/40 and 50/50 PAN/PEG/Nylon membranes met with the recommended pure water flux

Real-Time Tracking of Wildlife with IoT Solutions in Movement Ecology

Movement ecology has grown increasingly significant in the backdrop of global environmental changes, emphasizing the importance of understanding animal mobility patterns. The integration of Internet of Things (IoT) technology offers transformative potential for real-time wildlife tracking, addressing limitations of traditional methods like radio telemetry. Through IoT devices, researchers can acquire immediate, high-resolution datasets spanning vast distances, capturing multiple data points such as environmental conditions and physiological parameters. Existing implementations range from monitoring elephant movements in Africa to observing bird migrations. However, while promising, challenges like battery longevity, device weight, data management, and animal safety persist. As technological advances emerge, future prospects include more efficient, integrated solutions combining IoT with other technologies, poised to reshape and enrich our understanding of wildlife movement

Nanocontainers for Self-Healing Coatings on Mild Steel

Mild steel is an important material in construction, automobile, and other engineering applications. Long exposure to a corrosive environment causes damage to the material and makes it less efficient for usage. Various methodologies such as barrier coatings and self-healing coatings are employed to prevent corrosion to occur. To increase the performance of the coatings, modifications are carried out by the addition of corrosion inhibitors into the coating matrix. Direct addition leads to unwanted reactions with the coating matrix and loss of corrosion inhibitor itself. In order to prevent this problem, nanocontainers are used to encapsulate the self-healing agent/corrosion inhibitor. Therefore, recent corrosion prevention methods involve the fabrication of multifunctional coatings using different nanocontainers such as halloysite nanotubes, polymeric microcapsules, layered double hydroxide, etc. loaded with corrosion inhibitors. The release of corrosion inhibitors works on trigger mechanism arising due to change in external stimuli and thus increasing the durability of the coatings

Eficácia do herbicida amicarbazone no controle de cordas-de-viola na cultura da cana-de-açúcar (Saccharum spp.)

The objective of the work was to evaluate the selectivity and efficiency of amicarbazone herbicide in pre-emergency, in controlling Ipomoeas species in sugarcane crop. The experiment was developed between November, 2005 to November, 2006, in Santa Terezinha Farm, Pereira Barreto County, São Paulo State, cultivated by Pioneiros Bioenergia Company. The soil of the area is classified as LVE sandy texture. The experiment was developed in area of sugarcane crop of second year (first cut), with RB 86-5486 genotype and spacing of 1.4 m between lines. Ipomoeas species selected for the experiment: Ipomoea grandifolia, Ipomoea hederifolia, Ipomoea nil, Ipomoea quamoclit and Merremia cissoides, were sowed in parallel lines to the crop lines, after sugarcane cultivation operation. The experimental design was randomized complete blocks, with five treatments and four replications, with plots of 20 m2(5m x 4m). Treatments were constituted by amicarbazone (1050, 1225 and 1400 g ha-1) and checks, with and without weeds. Applications were accomplished in weeds pre-emergency, at 25 days after sugarcane harvest, by using a CO2 pressurized sprayer (45 lb pol-2), with bar equipped with four bar branding tips Teejet XR110.03, spaced of 0.5 m and spray volume of 200 L ha-1. It was concluded that amicarbazone herbicide (1050, 1225 and 1400 g ha-1) was selective to sugarcane plants and highly efficient in controlling I. grandifolia, I. hederifolia, I. nil, I. quamoclit and M. cissoides.O objetivo do trabalho foi avaliar a seletividade e a eficácia do herbicida amicarbazone em pré-emergência, no controle de espécies de cordas-de-viola na cultura da cana-de-açúcar. O experimento foi desenvolvido no período de novembro/2005 a novembro/2006, na Fazenda Santa Terezinha, Pereira Barreto-SP, cultivada pela Usina Pioneiros Bioenergia. O solo do local é do tipo LVE textura média. O experimento foi desenvolvido em área de cana-soca (1o corte), com a variedade RB 86-5486 e espaçamento de 1,4 m entrelinhas. As espécies de cordas-de-viola selecionadas para o experimento: Ipomoea grandifolia, Ipomoea hederifolia, Ipomoea nil, Ipomoea quamoclit e Merremia cissoides foram semeadas em linhas paralelas às linhas da cultura, após a operação de cultivo da cana-de-açúcar. O delineamento experimental foi o de blocos ao acaso, com cinco tratamentos e quatro repetições, com parcelas de 20 m2 (5 x 4 m). Os tratamentos foram: amicarbazone (1050, 1225 e 1400 g ha-1) e testemunhas no mato e no limpo. As aplicações foram realizadas em pré-emergência das plantas daninhas, aos 25 dias após a colheita da cana-de-açúcar, utilizando-se um pulverizador pressurizado a CO2 (45 lb pol-2), com barra equipada com quatro pontas da marca Teejet XR110.03, espaçados de 0,5 m e volume de calda de 200 L ha-1. Concluiu-se que o herbicida amicarbazone (1050, 1225 e 1400 g ha-1) foi seletivo às plantas de cana-de-açúcar e altamente eficiente no controle das cordas-de-viola: I. grandifolia, I. hederifolia, I. nil, I. quamoclit e M. cissoides

Mesospheric Gravity Waves Observed Near Equatorial and Low-Middle Latitude Stations: Wave Characteristics and Reverse Ray Tracing Results

Gravity wave signatures were extracted from OH airglow observations using all-sky CCD imagers at four different stations: Cachoeira Paulista (CP) (22.7° S, 45° W) and São João do Cariri (7.4° S, 36.5° W), Brazil; Tanjungsari (TJS) (6.9° S, 107.9° E), Indonesia and Shigaraki (34.9° N, 136° E), Japan. The gravity wave parameters are used as an input in a reverse ray tracing model to study the gravity wave vertical propagation trajectory and to estimate the wave source region. Gravity waves observed near the equator showed a shorter period and a larger phase velocity than those waves observed at low-middle latitudes. The waves ray traced down into the troposphere showed the largest horizontal wavelength and phase speed. The ray tracing results also showed that at CP, Cariri and Shigaraki the majority of the ray paths stopped in the mesosphere due to the condition of m2\u3c0, while at TJS most of the waves are traced back into the troposphere. In summer time, most of the back traced waves have their final position stopped in the mesosphere due to m2\u3c0 or critical level interactions (|m|→∞), which suggests the presence of ducting waves and/or waves generated in-situ. In the troposphere, the possible gravity wave sources are related to meteorological front activities and cloud convections at CP, while at Cariri and TJS tropical cloud convections near the equator are the most probable gravity wave sources. The tropospheric jet stream and the orography are thought to be the major responsible sources for the waves observed at Shigaraki

Sexto reporte de eventos adversos con tratamientos biológicos en Argentina. Informe del registro BIOBADASAR

Objetivo: actualizar los resultados del registro BIOBADASAR sobre seguridad, duración y causas de interrupción del tratamiento luego de 8 años de seguimiento. Métodos: BIOBADASAR es un registro de seguridad de terapias biológicas establecido por la Sociedad Argentina de Reumatología. Se presenta la descripción de BIOBADASAR 3.0, una cohorte compuesta por 53 centros de Argentina seguidos prospectivamente desde agosto de 2010 hasta enero de 2018