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29 results for “green synthesis”
Dataset of "Asparagine-Modified Magnetic Graphene Oxide: An Efficient and Green Nanocatalyst for Synthesis of 5-oxodihydropyrano[3,2-c]chromenes and dihydropyrano[2,3- c]pyrazole derivatives and the Density functional theory calculation".
<p>The primary focus of this study involved the fabrication of a novel nanocatalyst Fe3O4-supported asparagine functionalized graphene oxide (Fe3O4@GO-N-(Asparagine)). The catalyst was synthesized through a four-step procedure.</p>
Design of a Green Chemoenzymatic Cascade for Scalable Synthesis of Bio-based Styrene Alternatives
<p>As renewable lignin building blocks, hydroxystyrenes are particularly appealing as either a replacement or addition to styrene-based polymer chemistry. These monomers are obtained by decarboxylation of phenolic acids and often subjected to chemical modifications of their phenolic hydroxy groups to improve polymerization behaviour. Despite efforts, a simple, scalable, and purely (chemo)catalytic synthesis of acetylated hydroxystyrenes remains elusive. We thus propose a custom-made chemoenzymatic route that utilizes a phenolic acid decarboxylase (PAD). Our process development strategy encompasses a computational solvent assessment informing about solubilities and viable reactor operation modes, experimental solvent screening, cascade engineering, heterogenization of biocatalyst, tailoring of acetylation conditions, and reaction upscale in a rotating bed reactor. By this means, we established a clean one-pot two-step process that uses the renewable solvent CPME, bio-based phenolic acid educts and reusable immobilised PAD. The overall chemoenzymatic reaction cascade was demonstrated on a 1 L scale to yield 18.3 g 4-acetoxy-3-methoxystyrene in 96% isolated yield.</p>
Raw data of publication: Towards a greener synthesis of dianhydrohexitol esters (Green Chemistry, 2023)
<p>These are the raw data of all graphs shown in the publication:</p> <p>Katrin Städtke, Andreas W. Göpfert, Alexandra Inayat, Towards a greener synthesis of dianhydrohexitol esters, Green Chemistry, 2023</p> <p>DOI: 10.1039/d3gc01795h</p> <p>All raw data file names refer to the respective figures in this publication and its supplementary information file.</p>
Lichen biomass for green synthesis of silver nanocolloids
<p>Lichen is one of the most abundant non-vascular biomasses, however, a systematic study on application of the biomass in nanomaterial synthesis is very limited. In this study, aqueous lichen extract was obtained from <em>Hypotrachyna cirrhata, </em>one of the most abundant Himalayan Lichen biomass,<em> </em>following a simple cold percolation method. The effect of extract to silver nitrate mixing ratio, pH, and waiting time in growth and stability of nanoparticle was systematically explored. The rate constant for bio-reduction was found to be 5.3×10<sup>-3</sup> min<sup>-1</sup>. Transmission electron microscopy (TEM) showed a narrow particle size distribution with mean particle size of 11.1±3.6 nm (n=200) The X-ray diffraction (XRD) and selected area electron diffraction (SAED) techniques confirmed the formation of cubic crystals. The synthesized colloidal solution showed excellent response for Hg<sup>2+</sup> and Cu<sup>2+</sup> ions in spiked water samples. The limit of detection and calibration sensitivity for Hg<sup>2+</sup> and Cu<sup>2+</sup> ions were found to be 1 mg/L and 5 mg/L, and 2.9×10<sup>-3</sup> units/ppm and 1.6×10<sup>-3</sup> units/ppm; respectively. These findings suggested that green synthesis of spherical silver nanoparticles having narrow size distribution is possible using the aqueous lichen extract and the nanoparticles can be used for detection of selected heavy metals.</p>
Raw Data of the plots presented in the article entitled "Minute-Made, High-Efficiency Nanostructured Bi2Te3 via High-Throughput Green Solution Chemical Synthesis"
<p>This is the collection of raw data for the graphical items presented in the article with given details. </p> <p>This research has received funding from the Swedish Energy Agency (43521-1) and in part by Swedish Research Agency Council (VR, 2018-03462) and the European Union’s Horizon 2020 research and innovation program under the grant agreement No 863222.</p>
Figure 6 in Green synthesis of gold nanaoparticles using Delphinium Chitralense tuber extracts, their characterization and enzyme inhibitory potential
Figure 6. Comparative %age inhibition of AChE by Au NPs, crud extract and allanzanthane.
Figure 5 in Green synthesis of gold nanaoparticles using Delphinium Chitralense tuber extracts, their characterization and enzyme inhibitory potential
Figure 5. UV-Visible spectra of green synthesized gold nanoparticles.
Figure 7 in Green synthesis of gold nanaoparticles using Delphinium Chitralense tuber extracts, their characterization and enzyme inhibitory potential
Figure 7. Comparative %age inhibition of BChE by Au NPs, crude extract and Allanzanthane.
Figure 2 in Green synthesis of gold nanaoparticles using Delphinium Chitralense tuber extracts, their characterization and enzyme inhibitory potential
Figure 2. TEM images of green synthesized Au NPs at different magnifications.
Figure 1 in Green synthesis of gold nanaoparticles using Delphinium Chitralense tuber extracts, their characterization and enzyme inhibitory potential
Figure 1. SEM images of green synthesized of Au NPs at different magnifications.
Figure 3 in Green synthesis of gold nanaoparticles using Delphinium Chitralense tuber extracts, their characterization and enzyme inhibitory potential
Figure 3. FTIR spectrum of green synthesized gold nanoparticles.
Raw data files for the "The Mechanism of Rapid and Green Metal–Organic Framework Synthesis by In Situ Spectroscopy and Diffraction" manuscript
<p>All files are organized by figures in the main text of the original publication: https://doi.org/10.1021/acs.chemmater.4c00879, in the form of .csv files.</p>
Green synthesis of ZnO nanoparticles using Cocos nucifera leaf extract: Characterization, antimicrobial, antioxidant, and photocatalytic activity
<p>Zinc oxide nanoparticles (ZnO NPs) have been successfully prepared using <em>Cocos nucifera</em> leaf extract and investigated with their antimicrobial, antioxidant, and photocatalytic activity. The structural, compositional, and morphological properties of the NPs were recorded and studied systematically to confirm the synthesis. The aqueous suspension of NPs showed a UV-Vis. absorption maxima of 370 nm indicating primarily its formation. The XRD analysis identified the NPs with hexagonal wurtzite structure with an average particle size of 16.6 nm. The FTIR analysis identified some biomolecules and functional groups in the leaf extract as responsible for the encapsulation and stabilization of ZnO NPs. The EDX analysis showed the desired elemental compositions in the material. A flower-shaped morphology of ZnO NPs was observed by SEM with a grain size of around 15 nm. The optical properties of the NPs were studied by UV-Vis spectroscopy and the bandgap was calculated as 3.37 eV. The Prepared ZnO NPs have demonstrated antimicrobial activity against <em>T. harzianum</em>, and <em>S. aureus</em> with a ZOI (zone of inhibition) of 14 and 10 mm, respectively. The photocatalytic behavior of ZnO NPs showed absorbance degradation at around 640 nm and discolored methylene blue dye after one hour with a degradation maximum of 84.29 %. Thus, the prepared ZnO NPs could be used potentially in antibiotic development, pharmaceutical industries, and as photocatalysts. </p>
Green Synthesis of Copper Oxide Nanoparticles and its Efficiency in Degradation of Rifampicin Antibiotic
<p>The datasets came from synthesizing copper oxide nanoparticles from <em>Parthenium hysterophorus </em>aqueous extract, their characterization, and application in the degradation of rifampicin antibiotic. The data is presented in images and Microsoft Office Excel data sheets.</p>
Green Synthesis of Zinc Oxide (ZnO) Nanoparticles Using Aqueous Extract of Shilajit: Their Characterization and Anticancer Activity
<p>UV analysis of aqueous extract of shilajit and zinc oxide nanoparticles (ZnO NPs) of shilajit extract showed the absorbance peaks at 422.40 nm and 357.90 nm. The abosrbance peaks confirms the presence of ZnO NPs in the reaction mixture.</p> <p>The FTIR spectrum of shilajit extract and ZnO NPs of shilajith extract showed the strong broad absorbance at 3428 cm−1 are due to the stretching vibration of hydroxyl (OH) functional groups. The absorption band at 1633 cm-1 corresponded the stretching vibration of N-H groups. The peak at 1414 cm<sup>-1</sup> observed in the spectrum indicate the presence of mono-substituted alkynes. The peak at 1163 cm<sup>-1</sup> showed the presence of C-O bonds.</p> <p>The XRD pattern of ZnO NPs of shilajith extract, characterized by their high intensity, were observed at specific 2θ peak values, namely 31.69°, 34.33°, 36.17°, 47.45°, 56.52°, 62.77°, 67.87° and 68.99°, and can be attributed to the lattice planes (100), (002), (101), (102), (110), (103), (112), and (201), respectively.</p> <p>The particle size of ZnO NPs of shilajit extract was measured to be 348 nm and the polydispersity index was found to be 0.322.</p>
Bacterial mediated green synthesis of silver nanoparticles and their antibacterial and antifungal activities against drug-resistant pathogens
<p>In the healthcare sector, the production of bioactive silver nanoparticles (AgNPs) with antimicrobial properties is of great importance. In this study, a novel bacterial strain, <em>Paenibacillus</em> sp. MAHUQ-63, was identified as a potential candidate for facile and rapid biosynthesis of AgNPs. The synthesized AgNPs were used to control the growth of human pathogens, <em>Salmonella</em> Enteritidis and <em>Candida</em> <em>albicans</em>. The bacterial culture supernatant was utilized to synthesize the nanoparticles. FE-TEM examination showed spherical-shaped nanoparticles with 15 to 55 nm in size. FTIR analysis identified various functional groups. The synthesized AgNPs demonstrated remarkable activity against <em>S</em>. Enteritidis and <em>C. albicans</em>. The zone of inhibition (ZOI) for 100 µL (0.5 mg/mL) of AgNPs against <em>S</em>. Enteritidis and <em>Candida</em> <em>albicans</em> were 18.0 ± 1.0 and 19.5 ± 1.3 mm, respectively. The minimum inhibitory concentrations (MICs) were 25.0 and 12.5 μg/mL against <em>S</em>. Enteritidis and <em>Candida albicans</em>, respectively. Additionally, the minimum bactericidal concentrations (MBC) were 25.0 μg/mL against both pathogenic microbes. The FE-SEM analysis showed that the treatment of AgNPs caused morphological and structural damage to both <em>S</em>. Enteritidis and <em>Candida albicans</em>. Therefore, these AgNPs can be used as a new and effective antimicrobial agent.</p>
Bacterial mediated green synthesis of silver nanoparticles and their antibacterial and antifungal activities against drug-resistant pathogens
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Green synthesis of ZnO nanoparticles using Cocos nucifera leaf extract: Characterization, antimicrobial, antioxidant, and photocatalytic activity
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Lichen biomass for green synthesis of silver nanocolloids
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Dataset: Green synthesis of 1,3,5-triazine derivatives using a sonochemical protocol
<p>Dataset for publication Green synthesis of 1,3,5-triazine derivatives using a sonochemical protocol</p> <p>converted bio-chromoatographic experiments</p> <p> </p> <p>1) experiment desription</p> <p>2) chromatographic data</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.