Freely suspended and porous basket restrained granules of palladium nanoparticles supported on polymer-grafted Macadamia nutshell biomass (Pd@Polym-MNS) composite were used for the treatment chromium(VI)-containing water. In the presence of formic acid, the Pd@Polym-MNS demonstrated its activity in the adsorption-reduction-based conversion of noxious chromium(VI) to less toxic chromium(III) with a low activation energy of 13.4 kJ mol, ΔH (+ 10.8 kJ mol), ΔS (-270.0 J mol K), and ΔG (+ 91.3 to + 98.0 kJ mol) indicated the exothermic, endergonic and non-spontaneous nature of the catalytic redox reaction. In addition to facilitating easy recovery, rinsing, and reuse, restraining the Pd@Polym-MNS in the basket reactor helped maintain the integrity of the catalysts by preventing violent collisions of suspended granules with the mixing apparatus and the walls of the reaction vessel. Whereas the pseudo-first-order rate constant was recorded as 0.157 min upon initial use, values of the mean and relative standard deviation for the second, third and fourth consecutive uses were found to be 0.219 min and 1.3%, respectively. According to a response surface methodological approach to batch experimentation, the initial concentration of chromium(VI) and catalyst dosage had the greatest impact on the redox reaction rate, accounting for 85.7% and 11.6% of the variability in the value of the pseudo-first-order rate constant, respectively. Mutually beneficial effects of the combinations of high formic acid and low chromium(VI) concentration, high temperature and catalyst dosage as well as high formic acid and catalyst dosage were recorded.
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http://dx.doi.org/10.1038/s41598-021-03473-8 | DOI Listing |
Alzheimers Dement
December 2024
Johns Hopkins University School of Medicine, Baltimore, MD, USA.
Background: Arc is a synaptic immediate early gene that mediates two distinct pathways at excitatory synapses. Canonically, Arc accelerates endocytosis of AMPA receptors by direct binding to TARPgs and endocytic machinery and thereby contributes to mGluR-LTD. Arc also acts at recently potentiated synapses, where it is phosphorylated by CaMKII and binds NMDAR subunits NR2A and NR2B and recruits the PI3K adaptor p55PIK to assemble a signaling complex that activates AKT and inhibits GSK3β.
View Article and Find Full Text PDF3 Biotech
January 2025
Department of Agronomy, Abdul Wali Khan University, Mardan, 23200 Khyber Pakhtunkhwa Pakistan.
Soil contamination with toxic heavy metals [such as aluminum (Al)] is becoming a serious global problem due to the rapid development of the social economy. Although plant growth-promoting rhizo-bacteria (PGPR) are the major protectants to alleviate metal toxicity, the study of these bacteria to ameliorate the toxic effects of Al is limited. Therefore, the present study was conducted to investigate the combined effects of different levels of (5 ppm and 10 ppm) of accession number of MT123456 on plant growth and biomass, photosynthetic pigments, gas exchange attributes, oxidative stress and response of antioxidant compounds (enzymatic and nonenzymatic), and their specific gene expression, sugars, nutritional status of the plant, organic acid exudation pattern and Al accumulation from the different parts of the plants, which was spiked with different levels of Al [0 µM (i.
View Article and Find Full Text PDFJ Pharm Biomed Anal
January 2025
Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou 221004, China; Department of Pharmacy, Suining People's Hospital Affiliated to Xuzhou Medical University, Suining 221202, China; Department of Pharmaceutical Analysis, Xuzhou Medical University, Xuzhou 221204, China. Electronic address:
Currently, treatment with antiepileptic drugs (AEDs) is still the first choice for epileptic patients, while monitoring their blood concentrations is undoubtedly beneficial for minimizing their adverse side effects and optimizing their therapeutic effects. In this study, an ultra-high performance liquid chromatography coupled with tandem mass spectrometry with polarity switching was developed and validated for simultaneous determination of 14 AEDs and 2 active metabolites in human serum. Olanzapine was selected as the internal standard.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
January 2025
Inner Mongolia University, College of Chemistry and Chemical Engineering, 235 West University Street, Saihan District, 010021, Hohhot, CHINA.
Electrocatalytic glycerol oxidation reaction (GOR) to produce high-value formic acid (FA) is hindered by high formation potential of active species and sluggish C-C bond cleavage kinetics. Herein, Ni single-atom (NiSA) and Co single-atom (CoSA) dual sites anchored on nitrogen-doped carbon nanotubes embedded with Ni0.1Co0.
View Article and Find Full Text PDFSci Rep
January 2025
Leibniz Institute of Photonic Technology (Member of Leibniz Health Technologies, Member of the Leibniz Centre for Photonics in Infection Research, LPI), 07745, Jena, Germany.
Bone tissue, with its complex structure, often necessitates decalcification of the hard tissue for ex vivo morphological studies. The choice of a suitable decalcification method plays a crucial role in preserving desired features and ensuring compatibility with diverse imaging techniques. The search for a universal decalcification method that is suitable for a range of biophotonic analyses remains an ongoing challenge.
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