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Trials of cast steel filtration using two types of newly-developed foam filters in which carbon was the phase binding ceramic particles have been conducted. In one of the filters the source of carbon was flake graphite and coal-tar pitch, while in the other one graphite was replaced by a cheaper carbon precursor. The newly-developed filters are fired at 1000°C, i.e. at a much lower temperature than the currently applied ZrO2-based filters. During filtration trials the filters were subjected to the attack of a flowing metal stream having a temperature of 1650°C for 30 seconds.

This study aimed to investigate the level of environmental culture among Earth and environment sciences teachers in the northern Jordan valley brigade schools in light of some variables, and the positive practices towards the environment. The study sample consisted of (86) teachers, (55) female teachers and (31) male teachers, who taught Earth and environment sciences. Questionnaires were designed and were applied to the study sample to measure the positive practices towards the environment. The study results showed that the level of environmental knowledge among teachers was of moderate level with a score of (76%). The level of environmental practice among earth and environmental science teachers was moderate with a score of (63%), and there were no statistically significant differences in the level of environmental knowledge among teachers and their practice according to variables of gender, scientific qualification, and experience. The results indicated that there was a positive and strong relationship between the level of environmental knowledge of teachers and the level of environmental practice. The study recommended that earth and environment sciences teachers from different schools should be encouraged to exchange ideas, information and experiences related to environmental culture.

In the pseudo ternary MgO-Si3N4-Al2O3 system at 1800 °C the occurrence of liquid phase is limited to areas near the MgO-Si3N4 line, close to Si3N4. The area near the MgO-Al2O3 line is interesting from the point of view of refractory materials. The results of investigations into the properties and microstructure of magnesia-spine! materials with oxynitride and nitride matrix obtained bysintering are presented. The materials with a matrix composed of AIN polytypoids were characterized by very high refractoriness under load (RUL) in reducing conditions (T0.6>1700°C) and relatively high RUL in air (mm T0.5> 1620°C). The TG curves showed that the oxidation course was similar to and depended on the composition and mixture of samples. A very good correlation was found between the calculated values of R coefficient and resistance to thermal shocks sustained by the cylinders subjected to sudden heating up to 950 °C and cooling. [ABSTRACT FROM AUTHOR]

Abstract: The effect of milling was studied for the SrTiO3 samples. We show that by solid state reaction and subsequent milling it is possible to produce SrTiO3 powders with high specific surface area exceeding 10m2/g. However, grinding process induced changes in chemical composition and electronic structure of surface layers of SrTiO3 crystal grains. The changes are discussed in the context of kinetic demixing phenomena and partial amorphization of the surface region. [Copyright &y& Elsevier]

This research aims to estimate the relationship between green bond financing and the OECD nations' performance on the renewable energy indices. The study attempted to quantify the relationship between concepts by analyzing data from OECD countries for 2011-2019. Padroni unit root test, FMOLS, and DOLS method provide evidence for the study's results and convey broad policy implications on this important topic. The robustness is consequently examined through a long-term sensitivity analysis employing the FMOLS, and green bond financing nexus concerning the renewable energy indices is shown for comparison. The study showed that financing of green bonds had a predictable impact on renewable energy indices variables. Green bonds' unequal implications for renewable energy measures across the study period bear out this interpretation. The study's findings call for full suppot from government institutions, energy agencies, and departments to optimize energy efficiency, as green bond financing played a 32% role in OECD nation's renewable energy index constructions and increased per unit improvement in renewable energy sources by 9.6%. The research offers many policy recommendations for improving energy efficiency through renewable energy generation. Recent studies extend and contribute to the existing body of literature, although the scientific discussion on this subject matter still needs to be more detailed and understudied. Financial unpredictability may be transformed into a tremendous opportunity if the renewable energy business is appropriately regulated., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2024 The Authors. Published by Elsevier Ltd.)