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Total 4747 results found since Jan 2013.
Insight on the deterioration of cultural objects: a multi-analytical approach to characterize degradation products of lead weights from a Steinway & amp; sons piano
Environ Sci Pollut Res Int. 2023 Sep 14. doi: 10.1007/s11356-023-29790-1. Online ahead of print.ABSTRACTThe identification of the degradation products in objects of cultural significance, including musical instruments (e.g., a piano), is a key issue for the preservation and valorisation processes of cultural heritage. The aim of this study is to characterize the degradation products of lead weights from an important Steinway & sons piano using a multi-analytical approach that includes ionic chromatography (IC), X-ray diffraction (XRD) and Fourier transform-infrared (FTIR) spectroscopy analyses. These techniques allowed...
Source: Environmental Science and Pollution Research International - September 14, 2023 Category: Environmental Health Authors: Antonio Faggiano Concetta Pironti Oriana Motta Ylenia Miele Antonino Fiorentino Nadia Marchettini Maria Ricciardi Antonio Proto Source Type: research
Hesperidin: Enrichment, forced degradation, and structural elucidation of potential degradation products using spectral techniques
CONCLUSIONS: Hesperidin was labile under acidic and basic stress conditions. The potential DPs were characterized using LC-ESI-MS/MS and NMR spectral techniques. The proposed mechanism of formation was hypothesized. In addition, to identify and characterize the DPs, a SIAM, which has broad biomedical applications, was successfully developed.PMID:37706431 | DOI:10.1002/rcm.9615
Source: Rapid Communications in Mass Spectrometry : RCM - September 14, 2023 Category: Chemistry Authors: Amol Chhatrapati Bisen Priyanka Rawat Gaurav Sharma Sachin Nashik Sanap Sristi Agrawal Shiv Kumar Ashok Kumar Abhijit Deb Choudhury Sakshi Kamboj Tadigoppula Narender Sanjeev K Shukla Sanjeev Kanojiya Rabi Sankar Bhatta Source Type: research
Insight on the deterioration of cultural objects: a multi-analytical approach to characterize degradation products of lead weights from a Steinway & amp; sons piano
Environ Sci Pollut Res Int. 2023 Sep 14. doi: 10.1007/s11356-023-29790-1. Online ahead of print.ABSTRACTThe identification of the degradation products in objects of cultural significance, including musical instruments (e.g., a piano), is a key issue for the preservation and valorisation processes of cultural heritage. The aim of this study is to characterize the degradation products of lead weights from an important Steinway & sons piano using a multi-analytical approach that includes ionic chromatography (IC), X-ray diffraction (XRD) and Fourier transform-infrared (FTIR) spectroscopy analyses. These techniques allowed...
Source: Environmental Science and Pollution Research International - September 14, 2023 Category: Environmental Health Authors: Antonio Faggiano Concetta Pironti Oriana Motta Ylenia Miele Antonino Fiorentino Nadia Marchettini Maria Ricciardi Antonio Proto Source Type: research
Hesperidin: Enrichment, forced degradation, and structural elucidation of potential degradation products using spectral techniques
CONCLUSIONS: Hesperidin was labile under acidic and basic stress conditions. The potential DPs were characterized using LC-ESI-MS/MS and NMR spectral techniques. The proposed mechanism of formation was hypothesized. In addition, to identify and characterize the DPs, a SIAM, which has broad biomedical applications, was successfully developed.PMID:37706431 | DOI:10.1002/rcm.9615
Source: Rapid Communications in Mass Spectrometry : RCM - September 14, 2023 Category: Chemistry Authors: Amol Chhatrapati Bisen Priyanka Rawat Gaurav Sharma Sachin Nashik Sanap Sristi Agrawal Shiv Kumar Ashok Kumar Abhijit Deb Choudhury Sakshi Kamboj Tadigoppula Narender Sanjeev K Shukla Sanjeev Kanojiya Rabi Sankar Bhatta Source Type: research
Oxidized of chitosan with different molecular weights for potential antifungal and plant growth regulator applications
Int J Biol Macromol. 2023 Sep 11:126862. doi: 10.1016/j.ijbiomac.2023.126862. Online ahead of print.ABSTRACTThe application of Chitosan (CS) in drug delivery systems, plant growth promotion, antibacterial potentiality and plant defense is significantly limited by its inability to dissolve in neutral solutions. In this work, CS with different molecular weights (Mw) has been oxidized, yielding five kinds of oxidized chitosan (OCS 1-5) with solubilities in neutral solutions. The results obtained from Fourier Transform Infrared Spectroscopy clearly showed the successful oxidation of the hydroxyl group to form aldehyde and carb...
Source: International Journal of Biological Macromolecules - September 13, 2023 Category: Biochemistry Authors: Haoyang Du Fengkun Gao Shu Yang Hongxia Zhu Caihong Cheng Fei Peng Wenjing Zhang Zhe Zheng Xiuping Wang Yuedong Yang Wenlong Hou Source Type: research
Selective edge etching of Pd metallene for enhanced formic acid electrooxidation
Chem Commun (Camb). 2023 Sep 11. doi: 10.1039/d3cc03278g. Online ahead of print.ABSTRACTWe develop a facile, selective edge etching strategy to create edge sites in Pd metallene using acetic acid. The created edge sites remarkably increase the electrochemically active surface area but reduce the charge transfer resistance, resulting in significant enhancement of catalytic activity and stability toward formic acid oxidation.PMID:37694727 | DOI:10.1039/d3cc03278g
Source: Chemical Communications - September 11, 2023 Category: Chemistry Authors: Ze Liu Xiaohang Ge Yanrui Wang Mang Niu Weiyong Yuan Lian Ying Zhang Source Type: research
Metal-Free Tunable 1,2-Difunctionalization of Terminal Alkynes: Synthesis of β-Substituted α,β-Unsaturated Ketones
Chemistry. 2023 Sep 11:e202302294. doi: 10.1002/chem.202302294. Online ahead of print.ABSTRACTA metal-free tunable 1,2-difunctionalization of the terminal alkynes showcasing a tandem installation of C-C and C-S bonds has been developed. The key enabling factor for the approach is the use of acetic acid as an acyl source to synthesize β-substituted α,β-unsaturated ketones. The reaction at room temperature leads to the regioselective acylation at the terminal carbon of alkynes, whereas at -78 oC, the acylation occurs at the more substituted carbon.PMID:37691543 | DOI:10.1002/chem.202302294
Source: Chemistry - September 11, 2023 Category: Chemistry Authors: Muneer-Ul Shafi Bhat Majid Ahmad Ganie Bhahwal Ali Shah Source Type: research
New indole alkaloid Morucolletotricin from endophytic fungus < em > Colletotrichum queenslandicum < /em > associated with < em > Morus australis < /em > Poir. Leaf
Nat Prod Res. 2023 Sep 10:1-6. doi: 10.1080/14786419.2023.2250520. Online ahead of print.ABSTRACTSix compounds were isolated from the ethyl acetate extract of endophytic fungus Colletotrichum queenslandicum derived from Morus australis Poir. leaf. Based on NMR and MS data led to characterised of these compounds including one new indole alkaloid Morucolletotricin (1) along with two other indole alkaloids; tryptopol (2) and indole-3-acetic acid (3), phomopyronol (4), 2-(3-aminophenyl)acetic acid (5) and ergosterol (6). phomopyronol (4) and 2-(3-aminophenyl)acetic acid (5) were first reported from Colletotrichum fungi. The cy...
Source: Natural Product Research - September 10, 2023 Category: Biochemistry Authors: Kurnia Nastira Ningsih Euis Holisotan Hakim Source Type: research
Synthesis of Some Benzothiazole Derivatives Based on 3-hydroxypyridine-4-one and Benzaldehyde and Evaluation of their β-amyloid Aggregation Inhibition using both Experimental Methods and Molecular Dynamic Simulation
Chem Biodivers. 2023 Sep 10:e202301113. doi: 10.1002/cbdv.202301113. Online ahead of print.ABSTRACTSome novel inhibitors based on the (benzo[d]thiazol-2-yl)-1-phenylmethanimine derivatives were designed to reduce the aggregation process in Alzheimer's disease. These structures seem to mimic stilbene-like scaffold, while the benzothiazole moiety "locks" the thioflavin T binding site. Other inhibitors were designed based on 2-((benzo[d]thiazol-2-ylimino)methyl)-5-(benzyloxy)-1-methylpyridin-4(H)-one derivatives. Benzo[d]thiazol-2-amine derivatives were prepared by the reaction of aniline derivatives with ammonium thiocyanate...
Source: Chemistry and Biodiversity - September 10, 2023 Category: Biochemistry Authors: Mohammad Hossein Asgarshamsi Mehrdad M Dehkordi Afshin Fassihi Hossein Mohammad-Beigi Lotfollah Saghaie Source Type: research
New indole alkaloid Morucolletotricin from endophytic fungus < em > Colletotrichum queenslandicum < /em > associated with < em > Morus australis < /em > Poir. Leaf
Nat Prod Res. 2023 Sep 10:1-6. doi: 10.1080/14786419.2023.2250520. Online ahead of print.ABSTRACTSix compounds were isolated from the ethyl acetate extract of endophytic fungus Colletotrichum queenslandicum derived from Morus australis Poir. leaf. Based on NMR and MS data led to characterised of these compounds including one new indole alkaloid Morucolletotricin (1) along with two other indole alkaloids; tryptopol (2) and indole-3-acetic acid (3), phomopyronol (4), 2-(3-aminophenyl)acetic acid (5) and ergosterol (6). phomopyronol (4) and 2-(3-aminophenyl)acetic acid (5) were first reported from Colletotrichum fungi. The cy...
Source: Natural Product Research - September 10, 2023 Category: Biochemistry Authors: Kurnia Nastira Ningsih Euis Holisotan Hakim Source Type: research
Addition of Saccharomyces eubayanus to SCOBY fermentations modulates the chemical and volatile compound profiles in kombucha
This study highlights the potential for exploring different S. eubayanus strains for kombucha fermentation, and the significant yeast genotype effect in the profile differentiation in this process.PMID:37689417 | DOI:10.1016/j.fm.2023.104357
Source: Food Microbiology - September 9, 2023 Category: Food Science Authors: Camila A Venegas Luis A Saona Kamila Urbina Pablo Quintrel Tom ás A Peña Wladimir Mardones Francisco A Cubillos Source Type: research
Engineering natural isolates of Saccharomyces cerevisiae for consolidated bioprocessing of cellulosic feedstocks
This study therefore highlights the potential of these natural isolates to be used as chassis organisms in CBP bioethanol production. KEY POINTS: • Process-related fermentation stresses influence heterologous protein production. • Transformants produced up to 4.5 g/L ethanol, ~ 40% of the theoretical yield in CBP. • CRISPR/Cas9 was feasible for integrating genes in natural S. cerevisiae isolates.PMID:37688599 | DOI:10.1007/s00253-023-12729-4
Source: Applied Microbiology and Biotechnology - September 9, 2023 Category: Microbiology Authors: Letitia Minnaar Riaan den Haan Source Type: research
Rice Big Grain1 enhances biomass and plant growth-promoting traits in rhizospheric yeast Candida tropicalis
Appl Microbiol Biotechnol. 2023 Sep 9. doi: 10.1007/s00253-023-12740-9. Online ahead of print.ABSTRACTThe Big Grain1 (BG1) gene of rice (Oryza sativa L.) is reported to increase the yield of rice crops; however, its molecular mechanism is largely concealed. To explore its functional prospects, we have taken a structure-function-based approach. In silico analyses suggest OsBG1 is a DNA- and phytohormone-binding protein. Heterologous expression of OsBG1 with galactose-inducible promoter GAL1p in the rhizospheric yeast Candida tropicalis SY005 revealed 7.9- and 1.5-fold higher expression of the gene at 12 and 24 h, respective...
Source: Applied Microbiology and Biotechnology - September 9, 2023 Category: Microbiology Authors: None Ekta Debarati Biswas Gayatri Mukherjee Mrinal K Maiti Source Type: research
