New chemical procedures for preparation of manganese(II), cobalt(II), zinc(II) and cadmium(II) carbonates under the catalytic behavior of metal ions: Discussion of infrared spectral bands

Abstract: Mn(II), Co(II), Zn(II) and Cd(II) carbonates, respectively, were achieved by a new chemical procedure under the reaction of aqueous solutions of metal ions (MnCl 2 , Co(NO 3 ) 2 , Zn(NO 3 ) 2 or CdCl 2 ), potassium iodide and urea with molar ratio 1:2:10, respectively, at ~ 90 o C for 3 hrs. The infrared spectra of the results indicate absence of the essential bands of urea, but existed of the characteristic bands of ionic carbonate, CO 3 2-. An important chemical mechanisms discussed the preparation of Mn(II), Co(II), Zn(II) and Cd(II) carbonate compounds were suggested

Computational-based Generative Design Exploration, Multi-Agent System as an Approach

Architecture design problems are known for their sequential steps that address a series of several interweaving, competing and/or aligning requirements. Describing them as open-ended, uncertain, solution searching processes makes them complex and ill-structured design problems. One of the methods to deal with nonlinear complex systems is that their components’ properties and features must not be pre-determined and studied linearly in isolation. Instead, it is essential to consider the system as a whole, even if it means considering it generally and roughly, and then allow possible simplifications to occur from the dynamic interactions between components. Computational design methods that encounter distributed computation and artificial intelligence, such as Multi Agent System (MAS), showed promising abilities in addressing complexity and uncertainty faced with architecture design problems, as well as they proved positive effect on expanding architecture design exploration (ADE). This study has an interest in MAS capabilities in creating aesthetically innovative and performable architecture solutions. Therefore, this research intends to investigate the use of MAS in Architecture in the years between 2010 to 2020. It contributes with a detailed examination of research papers to orient future research in the field of MAS. Hence, the applied literature review raises the question of what the proved capacities of MAS are and how future research can challenge it further to widen and develop the use of MAS in ADE and their possible capabilities when addressing building performances such as structural, functional, and environmental. The databases used for selecting these papers are Scopus, Web of Science, SAGE, Science Direct, Google Scholar, Connected Papers, CUMINCAD, IEEXplore, and ACM Digital Library. These studies are organized, analyzed, and compared to pinpoint key innovations in MAS’s variable usage, study its applied methods, interesting results, important sources of data, implementation strategies, and shed the light on the gaps and shortcomings to draw a perspective of MAS in architecture. The examined studies are arranged chronographically. Then, each paper is analyzed and classified according to the aim of the methodology, domain, level, scale of application (experimentation level), model generation and optimization methods. Afterwards, a critical review is proposed

Fabrication and characterization of cellulose acetate-based nanofibers and nanofilms for H2S gas sensing application

Electrospun nanofibers and solution-casting nanofilms were produced from an environmentally friendly cellulose acetate (CA) blended with glycerol (as an ionic liquid (IL)), mixed with polypyrrole (PPy, a conducting polymer) and doped with tungsten oxide (WO3) nanoparticles. The sensing membranes fabricated were used to detect H2S gas at room temperature and shown to exhibit high performance. The results revealed that the lowest operating temperature of both nanofiber and nanofilm sensors was 20oC, with a minimum gas detection limit of 1 ppm. Moreover, the sensor exhibits a reasonably fast response, with a minimum average response time of 22.8 and 31.7 s for the proposed nanofiber and nanofilm based sensors, respectively. Furthermore, the results obtained indicated an excellent reproducibility, long-term stability, and low humidity dependence. Such distinctive properties coupled with an easy fabrication technique provide a promising potential to achieve a precise monitoring of harmful H2S gas in both indoor and outdoor atmospheres

(Z)-3-(4-Fluoro­phen­yl)-1-[4-(methyl­sulfon­yl)phen­yl]-2-tosyl­prop-2-en-1-one

In the title compound, C23H19FO5S2, two of the phenyl ring C atoms and a sulfonyl O atom of the phenyl(methylsulfonyl) group are disordered over two positions with occupancies 0.522 (17):0.478 (17). The methyl­phenyl and fluoro­phenyl rings are essentially planar, with maximum deviations of 0.0059 (8) and 0.0047 (9) Å, respectively. The crystal packing is stabilized by C—H⋯F inter­actions

Technological behavior of porcelain stoneware bodies with Egyptian syenites

The progressive depletion of the main feldspathic flux deposits in the World is forcing the ceramic industry to search for suitable substitutes. The aim of this study is to assess the potential of some feldspar sources in the Egyptian Eastern Desert, particularly syenites from Abu Khruq, in the manufacture of ceramic tiles. Beneficiated samples obtained by laboratory-scale mineral processing were tested into porcelain stoneware batches (from 10% to 30% wt in replacement of feldspars) and compared with a reference body through a laboratory reproduction of the industrial processing. The technological behavior of unfired tiles does not suffer any significant alteration due to the use of syenites. On the other hand, syenite-bearing bodies exhibit some changes in the phase composition and the chemistry of the melt, that turns richer in alkali, especially K2O. The consequently increased sintering rate depends mainly on the viscosity of the liquid phase formed during firing. In conclusion, syenites can be used without technological hindrances to manufacture porcelain stoneware tiles. The firing behavior of syenite-bearing batches can be reasonably adjusted by setting key parameters (eg, the feldspar amount and the Na/K ratio), but the darker color of fired bodies requires to further lower the iron oxide

Permeability evolution in sandstone due to injection of CO2-saturated brine or supercritical CO2 at reservoir conditions

We measured the change in permeability of two selected sandstones (Berea, Fonteinebleau) due to injection of CO2-saturated (“live”) brine, unsaturated (“dead”) brine or supercritical (sc) CO2 at reservoir conditions. We found that the permeability did not significantly change in a clean sandstone consisting of pure quartz (Fonteinemebleau) due to live or dead brine injection, although permeability changed due to scCO2 injection by ~23%. The permeability in the Berea sandstone, however, changed due to live or dead brine injection, by up to 35%; this permeability reduction in Berea sandstone was likely caused by fines release and subsequent pore throat plugging as the damage was more significant at higher injection rates. We expect that this phenomenon – i.e. rock permeability reduction due to CO2 injection into the formation – can have a significant and detrimental influence on CO2 injectivity, which would be reduced accordingly

Systematic review and meta-analysis of the value of initial biomarkers in predicting adverse outcome in febrile neutropenic episodes in children and young people with cancer

Background: Febrile neutropenia is a frequently occurring and occasionally life-threatening complication of treatment for childhood cancer. Many biomarkers have been proposed as predictors of adverse events. We aimed to undertake a systematic review and meta-analysis to summarize evidence on the discriminatory ability of initial serum biomarkers of febrile neutropenic episodes in children and young people. Methods: This review was conducted in accordance with the Center for Reviews and Dissemination Methods, using three random effects models to undertake meta-analysis. It was registered with the HTA Registry of systematic reviews, CRD32009100485. Results: We found that 25 studies exploring 14 different biomarkers were assessed in 3,585 episodes of febrile neutropenia. C-reactive protein (CRP), pro-calcitonin (PCT), and interleukin-6 (IL6) were subject to quantitative meta-analysis, and revealed huge inconsistencies and heterogeneity in the studies included in this review. Only CRP has been evaluated in assessing its value over the predictive value of simple clinical decision rules. Conclusions: The limited data available describing the predictive value of biomarkers in the setting of pediatric febrile neutropenia mean firm conclusions cannot yet be reached, although the use of IL6, IL8 and procalcitonin warrant further study