Heterogeneous reactions in a HFCVD reactor: simulation using a 2D model.

In this study, a simulation of the elementary chemical reactions during SiO film growth in a hot filament chemical vapor deposition (HFCVD) reactor was carried out using a 2D model. For the 2D simulation, the continuity, momentum, heat, and diffusion equations were solved numerically by the software COMSOL Multiphysics based on the finite element method. The model allowed for the simulation of the key parameters of the HFCVD reactor.

An experimental and numerical model of the behavior of cytosine in aqueous solution under gamma radiation. Relevance in prebiotic chemistry.

Cytosine is an essential chemical molecule in living systems, such as DNA and RNA, it is essential in astrobiology to study how it behaves under probable primitive conditions. We looked at how cytosine broke down in aqueous solutions exposed to high radiation levels to learn more about how stable it might have been on the early Earth. We conducted various types of analysis, such as ultraviolet-visible spectroscopy and high-pressure liquid chromatography.

Effect of reactive extrusion processing conditions on the production of potato-resistant starch and its use as an additive in yogurt.

Starch has multiple uses in the food industry as a stabilizer, adhesive, gelling agent, thickener, and water retention agent. Nonetheless, native starch presents limitations that restrict its applications. Thus, starch can be chemically modified by reactive extrusion (REX) to overcome these disadvantages.

Recessivity of deltamethrin resistance, kdr mutations, and detoxifying enzymes in hybrids of Triatoma phyllosoma subcomplex from Mexico.

Triatoma species from the phyllosoma subcomplex are sympatrically distributed and include some of the main vectors of Chagas disease in Mexico. Species within this subcomplex, including Triatoma pallidipennis, T. mazzottii, T.

Regulation of Catalase Expression and Activity by Hog1 in the Halotolerant Yeast Under Saline and Oxidative Conditions.

Efficient transcriptional regulation of the stress response is critical for microorganism survival. In yeast, stress-related gene expression, particularly for antioxidant enzymes like catalases, mitigates reactive oxygen species such as hydrogen peroxide (HO), preventing cell damage. The halotolerant yeast shows oxidative stress tolerance, largely due to high catalase activity from and genes.

Temperature and external fields in conceptual density functional theory.

Until quite recently, Conceptual DFT (CDFT) was mainly based on the energy functional, [,], where the number of electrons and the external potential are state variables. One of the strengths of CDFT, however, is the ease with which additional and/or different state variables can be incorporated. Here, the incorporation of new variables-namely temperature and external fields-is discussed, outlining the motivation for these extensions, sketching their theoretical/computational context, and presenting some elucidative examples.

Glycyrrhizic Acid Formulated in Hydrotalcite Nanocarriers Intended to Act as a Hepatoprotective Agent.

The article focuses on preparing a nanoformulation based on hydrotalcite and glycyrrhizic acid (GA), seeking a hepatoprotective effect. For this purpose, hydrotalcite-GA formulations were prepared by varying the following conditions to obtain optimal systems in terms of size and PDI (the lowest values), and Z potential (the highest values): (i) type of hydrotalcite (obtained by co-precipitation or calcined hydrotalcite); method used (ultrasound or high shear stirring), and (iii) type of stabilizer (Tween®80 or Pluronic® F-127). The best results were obtained using hydrotalcite obtained by co-precipitation, with high shear stirring and adding a stabilizer, either Tween®80 (HT-T80-GA: mean particle size = 315 nm, PDI = 0.

Toxicological and environmental risks of enalapril and their possible transformation products generated under phototransformation reactions.

Pharmaceutical active compounds (PACs) in the concentration range of hundreds of ng/L to μg/L have been identified in urban surface water, groundwater, and agricultural land where they cause various health risks. These pollutants are classified as emerging and cannot be efficiently removed by conventional wastewater treatment processes. The use of nano-enabled photocatalysts in the removal of pharmaceuticals in aquatic systems has recently received research attention owing to their enhanced properties and effectiveness.

Biomass-derived substrate hydrogenation over rhodium nanoparticles supported on functionalized mesoporous silica.

The use of supported rhodium nanoparticles (RhNPs) is gaining attention due to the drive for better catalyst performance and sustainability. Silica-based supports are promising for RhNP immobilization because of their thermal and chemical stability. Functionalizing silica allows for the design of catalysts with improved activity for biomass transformations.

Effect of land use and land cover changes on land surface warming in an intensive agricultural region.

Deforestation and alterations in land use are key factors contributing to rises in both local and global temperatures. However, the effect of these alterations on land surface temperature (LST) remains understudied in many areas that have experienced significant changes in land use. To address this gap, a spatial and temporal evaluation of land use and land cover (LULC) was performed to identify potential changes in LST using satellite imagery and statistical analysis.

Chromium Complex of Macrocyclic Ligands as Precursor for Nitric Oxide Release: A Theoretical Study.

Our research on the chromium complex of macrocyclic ligands as a precursor for nitric oxide release makes a significant contribution to the field of chemistry. We conduct a detailed analysis of nitrito chromium complexes, specifically trans-[M(III)L(ONO)], where M=Cr(III) and L-L represent different ligands such as L=1,4,8,11-tetraazacyclotetradecane, L= (5,7-dimethyl-6-benzylcyclam), L= (5,7-dimethyl-6-anthracylcyclam), L= (5,7-dimethyl-6-(p-hydroxymethylbenzyl)-1,4, 8,11-cyclam) and L= (5,7-dimethyl-6-(1¢-methyl-4'-(1"-carboxymethylpyrene) benzyl)-1,4,8,11-tetraazacyclotetradecane). Our objective is to comprehensively understand the mechanism of NO release and identify the key factors influencing NO delivery.

Unveiling the impact of enhanced hydrophobicity of ZIF-71 on butanol purification: insights from experimental and molecular simulations.

Biofuels offer significant potential for reducing carbon emissions and enhancing energy sustainability, but their efficient purification remains a significant challenge. In this study, the performance of a hydrophobic zeolitic imidazolate framework, ZIF-71(ClBr)-SE, in the adsorptive separation of butanol from single- and ternary-component systems (acetone, butanol, and ethanol) was investigated and compared with ZIF-8 and ZIF-71. Physicochemical characterization techniques, including XRD, SEM, BET, TGA, and DVS, confirmed that the modified ZIF-71 is hydrophobic, isostructural with ZIF-71, and has a higher surface area.

Pyrolysis and Physicochemical, Thermokinetic and Thermodynamic Analyses of (Kunth) Britt and Baker Waste to Evaluate Its Bioenergy Potential.

is an important species in Mexico that generates significant amounts of biomass waste during its exploitation, which can be utilized to produce energy. This study presents the characterization of this waste based on chemical (proximal and elemental) and thermal analyses (TGA-DTG) at different heating rates (β = 10-30 °C/min (283-303 K/min)) in the presence of nitrogen and in a temperature range of 25-900 °C. Kinetic parameters were calculated and analyzed as well.

A maternal diet high in carbohydrates causes bradyarrhythmias and changes in heart rate variability in the offspring sex-dependent in mice.

Background: Maternal obesity prepregnancy, as well as gestational overweight produced by high-sucrose diet, could be evolved to the cardiometabolic diseases in offspring during adulthood. Until then, the cardiometabolic diseases were ignored that have been presented or inherited in the offspring for overnutrition were ignored, depend on gender. We proposed that maternal prepregnancy obesity in CD1 mice, as well as gestational overweight produced by a high sucrose diet, develop to cardiometabolic disease in offspring and even if gender.

Alkaline saline lakes: A chemical evolution experiment evaluating the stability of formaldehyde in an aqueous saline environment.

Formaldehyde condensation in the presence of a mineral catalyst and under alkaline conditions is considered to be a "messy" chemical system due to its dependence on the complex chemical equilibrium between the reaction intermediates, which has a significant impact on the final products. This chemical system is extremely important in prebiotic chemistry and has been proposed as a potential pathway for carbohydrate formation in the early Earth. Saline and soda lakes are alkaline systems that could concentrate and accumulate a wide variety of ions (such as phosphate) and clay minerals, which can catalyze prebiotic chemical reactions.

In Vitro Antiprotozoal Activity of Extract, Partitions, and Fractions against .

Chagas disease, caused by the protozoan , represents an important and worldwide public health issue, particularly in Latin America. Limitations of conventional treatment with benznidazole and nifurtimox underscore the urgent need for new therapeutic strategies for this disease. , a tree used in traditional medicine for various ailments, has demonstrated promising antiparasitic activity.

Genomic Characterization of Sonora, a Strain with Inhibitory Activity against -AHPND and Probiotic Candidate for Shrimp Aquaculture.

Acute hepatopancreatic necrosis disease, caused by strains carrying the A and B toxin genes (VpAHPND), has been causing great economic losses in Asia and America in the shrimp farming industry. Numerous strains are resistant to antibiotics. However, supplementation with probiotic antagonists has become a more desirable treatment alternative.

Repurposing Insecticides for Mosquito Control: Evaluating Spiromesifen, a Lipid Synthesis Inhibitor against (L.).

The growing resistance of (L.) to conventional insecticides presents a major challenge in arbovirus control, necessitating the exploration of alternative insecticidal chemistries. Spiromesifen, derived from spirocyclic tetronic acids, is widely used against agricultural pests and is crucial in resistance management due to its unique lipid synthesis inhibition.

Radiolytic degradation of 4-hydroxybenzoate in aerated and deoxygenated aqueous solutions.

The radiolytic degradation of 4-hydroxybenzoate (4-HBA) in aerated, oxygen-free and NO-saturated aqueous solutions at concentrations of 0.10 and 0.25 mmol/dm were gamma irradiated at different doses in a source of Co-60.

RNA or DNA? Revisiting the Chemical Nature of the Cenancestral Genome.

One of the central issues in the understanding of early cellular evolution is the characterisation of the cenancestor. This includes the description of the chemical nature of its genome. The disagreements on this question comprise several proposals, including the possibility that AlkB-mediated methylation repair of alkylated RNA molecules may be interpreted as evidence of a cenancestral RNA genome.

Understanding Species Boundaries that Arise from Complex Histories: Gene Flow Across the Speciation Continuum in the Spotted Whiptail Lizards.

-Gene flow between diverging lineages challenges the resolution of species boundaries and the understanding of evolutionary history in recent radiations. Here, we integrate phylogenetic and coalescent tools to resolve reticulate patterns of diversification and use a perspective focused on evolutionary mechanisms to distinguish interspecific and intraspecific taxonomic variation. We use this approach to resolve the systematics for one of the most intensively studied but difficult to understand groups of reptiles: the spotted whiptail lizards of the genus Aspidoscelis (A.

Bionanomining: bioengineered CuO nanoparticles from mining and organic waste for photo-catalytic dye degradation.

The novel bioengineered CuO nanoparticles were successfully synthesized directly using green chemistry, the nontoxic and renewable aqueous extract of waste papaya peel (Carica papaya) as a precursor. The XRD analysis indicated a monoclinic phase of CuO nanoparticles and a size of 20 nm, and the optical absorption analysis showed a peak in the 264 nm range. In TEM, the morphology of the NPs was observed to be almost spherical with a particle size of 15 nm.

Priority list of pharmaceutical active compounds in aquatic environments of Mexico considering their occurrence, environmental and human health risks.

Pharmaceutical active compounds (PhACs) are detected pollutants in aquatic environments worldwide at concentrations ranging from ng L to µg L. Currently, PhAC monitoring is poorly realized in Mexico. This study proposes a priority list of PhACs in Mexican aquatic environments, considering their occurrence and environmental and human health risks.

Influence of the Water Model on the Structure and Interactions of the GPR40 Protein with the Lipid Membrane and the Solvent: Rigid versus Flexible Water Models.

G protein-coupled receptors (GPCR) are responsible for modulating various physiological functions and are thus related to the pathophysiology of different diseases. Being potential therapeutic targets, multiple computational methodologies have been developed to analyze their behavior and interactions with other species. The solvent, on the other hand, has received much less attention.