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Abstract2-Benzanine, also recognized as isoquinoline or benzo pyridine, acts as a weak tertiary base with diverse biological and pharmacological effects. These include potential activities against Parkinson’s disease, antimalarial, anti-HIV, insect growth, anticancer, antibiotic, antileukemic properties, and the ability to serve as a chiral ligand scaffold. In this study, the B3LYP technique and the basis set 6-311++G(d, p) were employed for both computational and experimental examinations of isoquinoline using density functional theory (DFT). The findings revealed that isoquinoline possesses a dipole moment of 2.004 D and rotational constants (GHz) of 3.101, 1.22, and 0.875. Various tests, including IR, UV–visible, HNMR, and binding energies, corroborated the experimental results. Analyzing the computed energy difference between the highest occupied molecular orbital (HOMO) at −5.581 eV and the lowest unoccupied molecular orbital (LUMO) at 1.801 eV indicated the stability of isoquinoline, with an energy gap of 3.78 eV. The electron polarizability and chemical hardness values were found to be 1.89 and 0.529, respectively. Drug-likeness tests suggest that isoquinoline could function as an antibiotic, given its similarity in effects to other compounds such as isoquinoline, quinolone, debrisoquine, palmatine, columbamine, and jatropine. [ABSTRACT FROM AUTHOR]

The Total reflection X-ray Fluorescence technique is increasingly popular for its simplicity and rapid elemental screening. This study evaluates the various analytical parameters including spectroscopic resolution, absolute sensitivity, relative element sensitivity, lowest limits of detection, accuracy and precision of the Total reflection X-ray Fluorescence spectrometer. This evaluation is conducted using quartz and acrylic sample carriers with mono and multi-element standards. Notably, the quartz sample carrier demonstrated excellent values of spectroscopic resolution, absolute sensitivity, the lowest limits of detection, a recovery rate of 90–110% and a coefficient of variation of 3–6% for the quantified elements from mono and multi-element standards. These findings underscore the robust analytical capability of the Total reflection X-ray Fluorescence technique for multi-trace elemental analysis. This research article not only provides practical and straightforward guidelines for handling Total reflection X-ray Fluorescence spectrometer but also confirms the practicality and effectiveness of the sample carriers for rapid and reliable elemental screening applications. [ABSTRACT FROM AUTHOR]

In our work, analcime has a crystallite size of 90.54 nm was synthesised using the hydrothermal method in the presence of urea as organic structure-directing agent. Then, Mn(II) ions were removed from aqueous media using the synthesised analcime sample. Some analytical parameters affecting the removal of Mn(II) ions were studied such as contact time, pH, concentration, and temperature. The results of the effect of contact time confirmed that the pseudo-second-order kinetic model was the best for describing the adsorption process. Also, the equilibrium time and optimum pH were 60 min and 6.5, respectively. Besides, the results of the effect of concentration confirmed that the Langmuir isotherm was the best for describing the adsorption process where the maximum adsorption capacity was 81.169 mg/g. Moreover, the results of the effect of temperature confirmed that the removal of Mn(II) ions was exothermic. [ABSTRACT FROM AUTHOR]

Poor flavor in tomato fruit is a serious consumer concern. It could be said that tomato flavor has declined as variety selection and tomato production has placed emphasis on yield, fruit size, firmness, disease resistance, and processing performance and not on aspects of organoleptic fruit quality. Consumers frequently associate recent varieties with a lack of flavor, although such an association has not been proven. We have reviewed the scarce available literature on the influence of recent genetic improvement on quality attributes of tomato. As a case study, we have analyzed several parameters related to fruit quality in some traditional Spanish cultivars and commercial F1 hybrids of tomato. Organic acids and sugars were determined by high performance liquid chromatography (HPLC). Sodium (Na), potassium (P), and phosphorus (K) were analyzed by atomic absorption spectroscopy. Levels of respiration and ethylene production were measured, and fruit firmness was determined using a texture analyzer. All determinations were performed at two maturity stages, representing two frequent consumption stages. Differences between traditional cultivars and hybrids were found for respiration rates, ethylene production, P and K fruit contents. We also found important differences between “old” and “modern” cultivars for their organic acids profile. All cultivars showed similar levels of malic and succinic acids, but the modern hybrids showed a ∼⃒75% higher content of citric acid. This could be due to the F1 hybrids carrying chromosomal segments recently introgressed from wild Lycopersicon species. The influence of recent genetic improvement on quality attributes of tomato fruit is discussed. [ABSTRACT FROM AUTHOR]