JBCS

This graphical abstract illustrates a novel methodology for real-time LHV (lower heating value) prediction in petrochemical plants using Poisson regression. The approach optimizes combustion efficiency in cracking furnaces, reducing energy consumption and emissions.

Blends of poly(methyl methacrylate)/polystyrene (PMMA/PS) with octadecylamine (ODA) that act in the interfacial region of the mixture and increase the charge density through the formation of the aggregates.

The novel polymer PAMNC12 synergizes with viscoelastic surfactants (VESs) to form a dense network structure, endowing the fracturing fluid with excellent sand-carrying capacity, drag reduction, temperature and shear resistance, and low formation damage.

Radon and its progeny account for 50% of exposure from natural sources. This study developed a simulator for indoor Rn monitoring. A concentration of 3,200 ± 324 and 4,654 ± 467 Bq m^-3 was obtained with passive and active methods, respectively.

The study used two classical models to analyze the infrared (IR) absorption of NaCl. The reduced mass linear diatomic model (RMLDM) showed no activity in IR, while linear diatomic model (LDM) suggests weak IR absorption. LDM combines elements of classical and quantum physics to obtain accurate estimates for IR absorption.

In this study, a novel berberine derivative featuring a substituted o-diaminobenzene moiety at the 9-position, strategically linked via an oxadiazole and alkyl chain, was rationally designed and synthesized based on the structural framework of histone deacetylase 6 (HDAC6) inhibitors. To elucidate its therapeutic potential, a comprehensive evaluation was conducted, integrating molecular docking, molecular dynamics simulations, and cytotoxicity assays. These studies collectively aimed to assess its binding affinity, stability, and anticancer efficacy, positioning this derivative as a promising HDAC6 inhibitor with potential therapeutic implications.

The use of multivariate tools for calibration and exploratory analysis was promisingly combined with the standard addition to characterize the content of Fe³⁺ ions available in medicinal herbal teas through digital image colorimetry.

The image illustrates the extraction of a biosurfactant from Citrus reticulata to synthesize and stabilize silver nanoparticles (AgNPs), which were characterized and tested for toxicity and surfactant properties. The AgNPs showed antimicrobial activity, mainly against two bacteria.

Pharmaceutical contaminants found in the Sangão River indicate inefficiency in the water treatment system impacting the environment.

The use of bioprospecting makes it possible to identify plant species that produce essential oils containing valuable chemical compounds, with potential for commercial applications.

This study evaluated the effects of the concentrations of the cross-linking agent sodium trimetaphosphate (STMP), alkalizing agent (sodium sulfate, SS) and cassava starch on the physical, chemical and mechanical properties of films based on cross-linked cassava starch.

The graphical abstract illustrates how the mesoporous structure of KIT-6, impregnated with cobalt oxide, acts as a catalyst in the production of biofuel from Jatropha curcas L. biomass, highlighting the reduction of CO₂ emissions and the use of sustainable energy.

Ionic liquid-based dispersive liquid-liquid microextraction (ILs-DLLME) followed by high-performance liquid chromatography (HPLC) under ultrasound assisted extraction was established as an effective analytical technique for the determination of Silybum marianum.

The flowchart outlines the principal steps and key aspects of the proposed prediction model utilizing artificial intelligence (AI) for the electrodeposition of zinc on low carbon steel substrates.

Tomato (L. esculentum Miller) cultivated in soil contaminated with fluorescent lamp powder absorbed potentially toxic elements, leading to its adaptation and the production of 5-O-feruloylquinic acid.

The proposed method aims at the multiresidue determination of pesticides from various classes in açaí pulp using a fast and efficient method based on modified QuEChERS (quick, easy, cheap, effective, rugged, and safe) and UHPLC-MS/MS (ultra-high performance liquid chromatography with tandem mass spectrometry).

Modifying the surface of TiO₂ with phosphate (PO₄^3-) increases the number of hydroxyl groups on the TiO₂ surface. This enhancement provides numerous Lewis basic sites that promote the adsorption and activation of CO₂. Additionally, the creation of P-O-Ti electron transfer channels aids in the crucial intermediate *COOH, improving the CO production efficiency.

Natural extracts of coffee leaves, yerba mate and jambolan pulp were evaluated, in the presence and absence of metallic ions of manganese, chromium and cobalt, in mixture with biodiesel.

Nitrosyl ruthenium complexes containing polypyridyl ligands were characterized and presented antibacterial action against Pseudomonas aeruginosa.

Evaluation of natural photodegradation in a semi-arid climate in the Sertão region of Pernambuco of pure poly (butylene adipate-co-terephthalate) (PBAT) films and additives with 5% of clove essential oil (Syzygium aromaticum (L.) Merr.).

The influence of different pressures of homogenization during the production of whole milk powder with crystallized lactose on free fat content and particle size.

The process begins with the collection of rice and rice husk. Through chemical processes, silica is extracted and subsequently adsorbed onto the bacterial cellulose membrane, which can be used for the controlled release of silica into the soil.

Propanol, butanol and pentanol were used as raw materials to obtain high-value products through the Guerbet reaction, using heterogeneous catalysts such as mixed metal oxides with copper.

This is a representation of a test well where a ceramic artifact was located and this fragment was characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray fluorescence spectroscopy (FRX), X-ray diffraction (XRD) and optical microscopy to determine composition characteristics and manufacturing method of the piece.

Stereoselective synthesis of α-aryl enaminones was developed by TfOH-promoted cascade reactions via 1,3-dipolar cycloaddition of alkyl azides with dibenzylidene ketones, aziridine formation, and 1,2-aryl migration. Starting materials are readily available and TfOH is easy to handle.

An alumina supported NiNb metal oxide prepared from hydrothermal method was successfully applied for ethane oxidative dehydrogenation (ODH) to ethylene. The hydrothermal method led to the feasible formation of active sites over the NiNb sample, which presented the highest selectivity toward ethylene due to the special nature of surface oxygen with low reducible sites.

Compounds 2 and 4 are novel via bromination. Compound 2 has inhibited well against Staphylococcus aureus and Bacillus cereus bacteria with minimal inhibitory concentration (MIC) values of 13.20 and 6.6 µM, respectively, and 2 inhibited stronger than parent compound 1.

Multivariate curve resolution is used to quantify the content of palm oil methyl biodiesel in diesel blends. This tool recovers the pure profiles of analytes in complex mixtures, managing to determine the concentration of the species of interest even in the presence of interferents.

KBiO₃ and BiOCl form the p-n heterojunction that makes the photo-induced electrons and holes efficiently separated and the recombination of electron-hole pairs hindered under visible light. Therefore, the photocatalytic effect can be greatly improved.

Chemistry has been revolutionized by the use of organic molecules as stereo selective catalysts. Experimental and computational studies clarified the reaction mechanisms. Now, statistical modeling has emerged as a powerful tool to fine-tune the selectivity of organocatalysts.

Main databases used to search for articles about Remijia, and some of their biological activities and chemical substances.

N-Sulfonyl-1,2,3-triazoles obtained by "click" reactions are in equilibrium with acyclic diazoimines. In the presence of transition metals, these species generate α-imino metal carbenes, which are versatile species in the synthesis of alkaloids.

This graphical abstract summarizes the key topics of the review article. The process of raw biogas contaminated with siloxanes involves three critical steps: sampling, analysis, and purification. These steps result in purified biogas, which can be used for various applications.

The scheme shows the image of the constructed photoreactor, with its main characteristics inside a circle that represents the colors of the visible spectrum.

Hybrid educational activities, which combine digital games and low-cost materials, can be effective in motivating students in challenging subjects. This article presents one of these activities, which used digital games on stereochemistry and nomenclature of organic compounds, encouraging interaction and facilitating learning.

One of the best ways to consolidate the experimentation seen in laboratory classes of Qualitative Analytical Chemistry classes is to demonstrate to the students how the knowledge is present in everyday situations, and popular science texts are important tools for learning and debating it.

This article presents an epistemological perspective on the construction of the concept of chemical bonds proposed by Gilbert Lewis, considering the ideas that contributed to the development of this concept.

Benzyl isothiocyanate (BITC) is a bioactive compound formed in papaya seeds from fruit lesions. The state of Espírito Santo stands out in the cultivation of this fruit. The context was used to address and apply chemical knowledge in the training of chemistry teachers.

Six categories of arguments proposed by prospective teachers on the importance of Chemistry in the secondary school curriculum and its implications for chemistry teacher preparation in Brazil.

The acetylsalicylic acid produced in the experimental classes, which would typically be discarded, is recycled through purification and characterization for later use as a fingerprint developer.

Graphical summary of the theoretical aspects (one-pot synthesis) that will be explored in this work, which aims to contribute to the chemistry teaching in Brazilian higher education.

Chemistry education focused on citizenship education, ethics in interpersonal relationships and mainly criticism of social and cultural inequalities.

Berthelot and Afonso Celso: two outstanding examples of 19^th century denialists. This study examines persistent denialism extending from the beginning of the modern period to our own days, across various fields.

In this article, we present a ChemTech acceleration program where the academic participants (researchers and students) develop entrepreneurial skills while taking their chemical technologies from universities to the market/industry.