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Acetamido-bridged 2-substituted benzoxazole and N-ethyl piperazine derivatives: Synthesis, antimicrobial evaluation, molecular modeling, and DFT studies
No full textComparison of the Effectiveness of Nutritional Risk Score-2002 and Royal Free Hospital-Nutritional Prioritizing Tool Nutrition Screening Tools in Liver Cirrhosis
No full textMagnetic Dispersive Micro-Solid Phase Extraction of Pb(II) Using Core–Shell mMWCNTs@CoNiFe-LDH Nanoflowers From Food and Water Samples
No full textA new magnetic dispersive micro-solid-phase extraction method was developed for the detection of Pb(II) ions, using hierarchical nanocomposite (mMWCNTs@CoNiFe-LDH). This adsorbent synergistically combines magnetic multi-walled carbon nanotubes with flower-like CoNiFe-layered double hydroxide (LDH), providing rapid extraction within 3 min and simple magnetic separation. The extensive characterization validated its porous core–shell design, elevated surface functioning, and thermal stability. Under optimal conditions, this method demonstrated good sensitivity (LOD: 0.142 µg L⁻1, LOQ: 0.431 µg L⁻1), and precision (RSD ≤ 4.2%). The nanocomposite exhibited high reusability and selectivity in the presence of significant concentrations of interfering ions. The approach, validated with certified reference materials (90–94% recovery) and used for several matrices (water, food and tobacco), indicated worrisome Pb concentrations in curry powder (22.1 µg kg⁻1) and tobacco (71.8 µg kg⁻1). Evaluations of greenness confirmed environmental sustainability. This method provides a fast and dependable option for analyzing Pb(II) in food and water samples
Investigating the Mediating Role of Social Support in the Relationship Between Death Anxiety and Stress in Chronic Illness
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Cellulose fibers production from agricultural waste and use as functional cellulose additive in polylactic acid bioplastic films
No full textThis study explores a sustainable method for bioplastic production using agricultural waste. Polylactic acid (PLA)-based films were developed by incorporating cellulose extracted from rice husks (RH) and sunflower stalks (SS). The cellulose extraction process achieved an average efficiency of 85% based on total agricultural waste mass. Chemical structures of PLA and composite films were examined using FTIR spectroscopy. All films were flexible and transparent, with pure PLA films exhibiting higher transparency. Such properties make PLA films ideal for packaging, biomedical, and electronic applications due to their lightweight and adaptable nature. Films containing SS-derived cellulose showed slightly greater thickness (0.197–0.232 mm) compared to those with RH cellulose. FTIR analysis revealed interactions between PLA and cellulose, indicated by reduced intensity of the –OH stretching band at 3338 cm-1 and PLA characteristic peaks at 1452, 1748, and 1181 cm-1. These changes suggest hydrogen bonding and limited polymer chain mobility due to conformational adjustments. The spectra of composite films resembled those of PLA and cellulose, confirming enhanced crystallinity and molecular interactions. This is the first comparative study using cellulose from both RH and SS in PLA-based bioplastics, demonstrating their combined potential as sustainable reinforcements for biodegradable materials
Kırgızistan Orjinli Bazı Süs Bitkisi ve Tıbbi Aromatik Bitkilerin Moleküler, Morfolojik ve Biyokimyasal Karakterizasyonu
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Low-Cost and High-Performance ITO/ZnO/ITO Multilayer Structure for Silicon Heterojunction Solar Cells
No full textBazı yerli ve yabancı kayısı çeşitlerinin Kayseri ekolojisinde pomolojik ve biyokimyasal özelliklerin belirlenmesi
No full textDFT quantum chemical calculations and statistical analysis of 2-amino-6-arylsulfonylbenzonitrile derivatives and their electrical properties
No full textQuantum chemicalcalculations were performed for gas and water phases using theDFT/B3LYP/6-311G(d,p) basis set to determine some molecular properties of2-amino-6-arylsulfonylbenzonitrile derivatives (1-61). The quantum chemicalproperties of these compounds such as EHOMO (highest occupied molecularorbital energy), ELUMO(lowest unoccupied molecular orbital energy), HOMO-LUMO energy gap(∆E), ionization potential (I), chemical hardness (η) and softness (σ),etc. values were calculated and the results were discussed. This research aims toconstruct the relationship between HIV-reverse transcriptase inhibitoryactivity (pIC50) values and classical-quantum descriptors(attributes) of 61 compounds. The values of the attributes are extracted byutilizing B3LYP/6-311G(d,p) method. This endeavour leads to differentstatistical models since the data contain both nonlinearity and clusteredstructure. In this study, 2-amino-6-arylsulfonylbenzonitrile derivatives (1-61)were classified into three subsets based on the atom or group attached at the Xposition: Subset S (compounds 1-19), Subset SO (compounds 20-32), and SubsetSO₂ (compounds 33-61). Then each subgroup is split into more statisticallyhomogeneous subsets using statistical models suggesting that the ratio denotedby ∆EI is the most significant variable that accounts for pIC50 for both groups of S and SO2with 95 and 90 percent coefficients of determination, respectively. On theother hand, for the group SO, we have a more complicated significant variablethat accounts for pIC50, which is I+DMEN*Electrophily . Moreover,In the context of2-amino-6-arylsulfonylbenzonitrile derivatives, compounds 2, 24, and50 for gas phase, and compounds 15, 30, and 50 forwater phase exhibit higher HOMO energies and smaller ΔE values compared toother molecules in the series. This suggests that, according to theΔE values, these compounds have a higher tendency to donate electrons and havea more effective reactivity than the other compounds in the series.</p