Month: November 2022

On June 1, 2020, Mukherjee, Manjistha; Dey, Abhishek published an article.Recommanded Product: 143-10-2 The title of the article was Catalytic C-H Bond Oxidation Using Dioxygen by Analogues of Heme Superoxide. And the article contained the following:

Heme active sites are capable of oxidizing organic substrates by four electrons using mol. oxygen (heme dioxygenases), where a dioxygen (O2) adduct of heme (FeIII-O2•-) acts as the primary oxidant, in contrast to monooxygenases, where high-valent species are involved. This chem., although lucrative, is difficult to access using homogeneous synthetic systems. Over the past few years using a combination of self-assembly and in situ resonance Raman spectroscopy, the distribution of different reactive intermediates formed during the electrochem. reduction of oxygen has been elucidated. An FeIII-O2•- species, which is the reactive species of dioxygenase, is an intermediate in heterogeneous electrochem. O2 reduction by iron porphyrins and its population, under electrochem. conditions, may be controlled by controlling the applied potential. Iron porphyrins having different axial ligands are constructed on a self-assembled monolayer of thiols on an electrode, and these constructs can activate O2 and efficiently catalyze the dioxygenation of 3-methylindole and oxidation of a series of organic compounds having C-H bond energies between 80 and 90 kcal mol-1 at potentials where FeIII-O2•- species are formed on the electrode. Isotope effects suggest that hydrogen-atom transfer from the substrate is likely to be the rate-determining step. Axial thiolate ligands are found to be more efficient than axial imidazoles or phenolates with turnover numbers above 60000 and turnover frequencies over 60 s-1. These results highlight a new reaction engineering approach to harness O2 as a green oxidant for efficient chem. oxidation Four-electron oxidation of a substrate by oxygen catalyzed by iron porphyrins. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Recommanded Product: 143-10-2

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On November 30, 2022, Kulkarni, Jayant; Sharma, Sandeep; Sahoo, Sripati A.; Mishra, Shefali; Nikam, Tukaram D.; Borde, Mahesh; Penna, Suprasanna; Srivastava, Ashish K. published an article.Computed Properties of 473-81-4 The title of the article was Resilience in primary metabolism contributes to salt stress adaptation in Sesuvium portulacastrum (L.). And the article contained the following:

Abstract: Sesuvium portulacastrum (L.) is a facultative halophyte that grows in subtropical coastal sides of the eastern and western regions of India. In the present study, the activation of antioxidant machinery was observed at 8 and 24 h after 250 mM NaCl stress treatment. Further, GC-MS/MS based metabolomics was performed, independently in root (NR8 and NR24) and shoot (NS8 and NS24). A total of 53 and 62 metabolites were detected in roots and shoots, resp., that mainly included sugars, amino acids, organic acids and polyols. On the basis of statistical significance, sucrose and ethanolamine were identified as differentially altered metabolites (DAMs) shared under all the treatment conditions. Heat-map based clustering anal. substantiated the role of sugars and amino acids in NR8; while, sugars in NS8/NS24 treatments. For most of the DAMs, extent of change at NR24 was significantly dampened than NR8, which also coincided with reduced correlation strength between different metabolite groups, indicating partial metabolite restoration. The enrichment anal. identified sugars, amino acid and TCA cycle metabolism as major pathways altered under salt stress conditions. A total of 30 metabolomic datasets from 7 different halophytes, including the present study, were utilized to perform meta-anal. On the basis of cumulative pathway score (CPS) of both root and shoot, aspartate-alanine-glutamate (290.62) was identified as the most significant pathway followed by arginine biosynthesis (0.62) and glyoxylate-dicarboxylate metabolism (0.46) that significantly contributed to salt-adaptation in halophytes. Thus, the holistic anal. of salt-responsive metabolites/pathways from halophytes will pave the way for enhancing salt-tolerance in crop plants. The experimental process involved the reaction of 2,3-Dihydroxypropanoic acid(cas: 473-81-4).Computed Properties of 473-81-4

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On November 18, 1980, Liepins, E.; Popelis, J.; Birgele, I.; Urtane, I.; Zelcans, G.; Lukevics, E. published an article.Recommanded Product: 2160-93-2 The title of the article was The conformations of N-substituted 2,2-diaryl-1,3-dioxa-6-aza-2-silacyclooctanes in solution. And the article contained the following:

1H, 13C and 29Si NMR data obtained for 2,2-diaryl-1,3-dioxa-6-aza-2-silacyclooctanes indicate the occurrence in solution of an equilibrium between the conformations boat-boat ⇄ chair-chair which are determined by the presence or absence of a transannular N → Si bond. The equilibrium is greatly affected by the electronic and steric effects of the N- and Si-substituents. The experimental process involved the reaction of 2,2′-(tert-Butylazanediyl)diethanol(cas: 2160-93-2).Recommanded Product: 2160-93-2

The Article related to conformation diaryldioxaazasilacyclooctane nmr, Physical Organic Chemistry: Stereochemistry and other aspects.Recommanded Product: 2160-93-2

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On January 31, 2022, Vrancheva, Radka; Dincheva, Ivayla; Aneva, Ina; Georgiev, Vasil; Pavlov, Atanas published an article.Application of 473-81-4 The title of the article was GC-MS-based metabolite profiling of wild and in vitro growing plants of Satureja montana L.. And the article contained the following:

Satureja montana L. is used as a traditional culinary spice in the Balkan Peninsula cuisine, as well as in the folk and traditional medicine for treatment of different diseases. The supply of secondary metabolites from naturally growing plants has many restrictions, such as biomass availability and variations in the chem. composition, which is most strongly affected by seasonal and environmental- mental factors. These disadvantages could be overcome by cultivating plants in optimized and controlled in vitro conditions. The purpose of the current study was to compare the phytochem. compositions of newly developed in vitro plants and intact plants of S. montana used for production of secondary metabolites. The GC-MS anal. revealed the presence of a number of primary (carbohydrates, amino acids, organic acids and lipids) and secondary metabolites (phenolic acids) with pharmacol. and biol. activities beneficial to humans. The results revealed that in vitro S. montana plants are a potential biotechnol. matrix for the production of valuable biol. active substances for the food, pharmaceutical and cosmetic industries. The experimental process involved the reaction of 2,3-Dihydroxypropanoic acid(cas: 473-81-4).Application of 473-81-4

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On July 12, 2022, Zaitsu, Kei; Asano, Tomomi; Kawakami, Daisuke; Chang, Jiarui; Hisatsune, Kazuaki; Taniguchi, Masaru; Iguchi, Akira published an article.Safety of 3-Hydroxyphenylacetic acid The title of the article was Metabolomics and Data-Driven Bioinformatics Revealed Key Maternal Metabolites Related to Fetal Lethality via Di(2-ethylhexyl)phthalate Exposure in Pregnant Mice. And the article contained the following:

We performed serum metabolome anal. of di(2-ethylhexyl)phthalate (DEHP)-exposed and control pregnant mice. Pregnant mice (n = 5) were fed a DEHP-containing diet (0.1% or 0.2% DEHP) or a normal diet (control) from gestational days 0-18. After maternal exposure to 0.2% DEHP there were no surviving fetuses, indicating its strong fetal lethality. There were no significant differences in the numbers of fetuses and placentas between the 0.1% DEHP and control groups, although fetal viability differed significantly between them, suggesting that maternal exposure to 0.1% DEHP could inhibit fetal growth. Metabolomics successfully detected 169 metabolites in serum. Principal component anal. (PCA) demonstrated that the three groups were clearly separated on PCA score plots. The biol. interpretation of PC1 was fetal lethality, whereas PC2 meant metabolic alteration of pregnant mice via DEHP exposure without fetal lethality. In particular, the first component was significantly correlated with fetal viability, demonstrating that maternal metabolome changes via DEHP exposure were strongly related to fetal lethality. Levels of some amino acids were significantly increased in the DEHP-exposed groups, whereas those of some fatty acids, nicotinic acid, and 1,5-anhydroglucitol were significantly decreased in the DEHP groups. DEHP-induced increases in glycine levels could cause fetal neurol. disorders, and decreases in nicotinic acid could inhibit fetal growth. In addition, a machine-learning Random forest could determine 16 potential biomarkers of DEHP exposure, and data-driven network anal. revealed that nicotinic acid was the most influential hub metabolite in the metabolic network. These findings will be useful for understanding the effects of DEHP on the maternal metabolome in pregnancy and their relationship to fetal lethality. The experimental process involved the reaction of 3-Hydroxyphenylacetic acid(cas: 621-37-4).Safety of 3-Hydroxyphenylacetic acid

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Malecki, Jan; Tomasevic, Igor; Solowiej, Bartosz G. published an article in 2022, the title of the article was The influence of the syrup type on rheology, color differences, water activity, and nutritional and sensory aspects of high-protein bars for sportsmen.Recommanded Product: SweetPearlR P300 DC Maltitol And the article contains the following content:

Most often, high-protein bars consist of a protein preparation in the form of a loose powder, stuck together with a syrup mixture, ensuring a stable mass. According to the legal regulations in force, at least 20% of the energy value must come from protein for the product to be called high-protein. The objective of this study was to evaluate the impact of different syrup sources (oligofructose, maltitol, tapioca fiber, and chickpea-maize fiber) on rheol., water activity, color, and nutritional and sensorial properties of high-protein bars. Texture has changed depending on the type of syrup used. A significant increase of the hardness parameter referring to the control sample was noted for bars containing chickpea-maize liquid fiber in chocolate (311.65 N), with low adhesiveness simultaneously (54.71 N). Samples without chocolate made with the use of oligofructose syrup had apparently higher dynamic viscosities than other bars (226.67 mPas · g/cm3). The water activity of all tested bars indicated the high stability of samples over time (<0.80), except for samples without chocolate made of PM syrup. The color of the tested bars was from light cream to Earth yellow. Bars obtained with tapioca liquid fiber had the lowest nutritional value. Results presented in this study suggest that selecting the correct type of syrup may significantly influence the functional properties of high-protein bars. The experimental process involved the reaction of SweetPearlR P300 DC Maltitol(cas: 585-88-6).Recommanded Product: SweetPearlR P300 DC Maltitol

The Article related to syrup rheol water activity high protein bar human, Placeholder for records without volume info and other aspects.Recommanded Product: SweetPearlR P300 DC Maltitol

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On August 15, 2022, Ma, Jian; Ma, Yanhong; Zhang, Hongzhi; Chen, Zhiling; Wen, Bo; Wang, Yu; Huang, Wuyang published an article.Safety of 2,4-Di-tert-butylphenol The title of the article was The quality change of fig wine fermented by RV171 yeast during the six-month aging process. And the article contained the following:

In the present study, the objective was to determine the quality changes of fig wine fermented with single yeast during six months of aging process. The suitable single yeast was screened, and the optimal fermentation process was determined through single-factor exptl. anal. and response surface methodol. The fig wine prepared by the optimal fermentation process then aged for six months. The results showed that the strain RV171 was the most suitable yeast among six evaluated yeast strains. The optimal process conditions were yeast addition 0.3%, fermentation temperature 28 °C, and fermentation time 9 days. During the aging process, the contents of vitamin C, total phenolics and flavonoids, as well as antioxidant activity of fig wine changed significantly. There was a pos. correlation between these bioactive substances and antioxidant capacity. In addition, significant differences existed for volatile aroma compounds in fig wine at different aging times. When fig wine is aged for one month, the content of ester volatile components was the highest, while the aroma is better than the others. The present study could provide theor. basis for the production and aging process of fig wine, which would be helpful for further investigation and application of figs to functional foods. The experimental process involved the reaction of 2,4-Di-tert-butylphenol(cas: 96-76-4).Safety of 2,4-Di-tert-butylphenol

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On June 15, 2022, Armbruster, Michael R.; Grady, Scott F.; Arnatt, Christopher K.; Edwards, James L. published an article.Product Details of 473-81-4 The title of the article was Isobaric 4-Plex Tagging for Absolute Quantitation of Biological Acids in Diabetic Urine Using Capillary LC-MS/MS. And the article contained the following:

Isobaric labeling in mass spectrometry enables multiplexed absolute quantitation and high throughput, while minimizing full scan spectral complexity. Here, we use 4-plex isobaric labeling with a fixed pos. charge tag to improve quantitation and throughput for polar carboxylic acid metabolites. The isobaric tag uses an isotope-encoded neutral loss to create mass-dependent reporters spaced 2 Da apart and was validated for both single- and double-tagged analytes. Tags were synthesized inhouse using deuterated formaldehyde and Me iodide in a total of four steps, producing cost-effective multiplexing. No chromatog. deuterium shifts were observed for single- or double-tagged analytes, producing consistent reporter ratios across each peak. Perfluoropentanoic acid was added to the sample to drastically increase retention of double-tagged analytes on a C18 column. Excess tag was scavenged and extracted using hexadecyl chloroformate after reaction completion. This allowed for removal of excess tag that typically causes ion suppression and column overloading. A total of 54 organic acids were investigated, producing an average linearity of 0.993, retention time relative standard deviation (RSD) of 0.58%, and intensity RSD of 12.1%. This method was used for absolute quantitation of acid metabolites comparing control and type 1 diabetic urine. Absolute quantitation of organic acids was achieved by using one isobaric lane for standards, thereby allowing for anal. of six urine samples in two injections. Quantified acids showed good agreement with previous work, and six significant changes were found. Overall, this method demonstrated 4-plex absolute quantitation of acids in a complex biol. sample. The experimental process involved the reaction of 2,3-Dihydroxypropanoic acid(cas: 473-81-4).Product Details of 473-81-4

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On June 15, 2022, Armbruster, Michael R.; Grady, Scott F.; Arnatt, Christopher K.; Edwards, James L. published an article.Quality Control of 3-Hydroxyphenylacetic acid The title of the article was Isobaric 4-Plex Tagging for Absolute Quantitation of Biological Acids in Diabetic Urine Using Capillary LC-MS/MS. And the article contained the following:

Isobaric labeling in mass spectrometry enables multiplexed absolute quantitation and high throughput, while minimizing full scan spectral complexity. Here, we use 4-plex isobaric labeling with a fixed pos. charge tag to improve quantitation and throughput for polar carboxylic acid metabolites. The isobaric tag uses an isotope-encoded neutral loss to create mass-dependent reporters spaced 2 Da apart and was validated for both single- and double-tagged analytes. Tags were synthesized inhouse using deuterated formaldehyde and Me iodide in a total of four steps, producing cost-effective multiplexing. No chromatog. deuterium shifts were observed for single- or double-tagged analytes, producing consistent reporter ratios across each peak. Perfluoropentanoic acid was added to the sample to drastically increase retention of double-tagged analytes on a C18 column. Excess tag was scavenged and extracted using hexadecyl chloroformate after reaction completion. This allowed for removal of excess tag that typically causes ion suppression and column overloading. A total of 54 organic acids were investigated, producing an average linearity of 0.993, retention time relative standard deviation (RSD) of 0.58%, and intensity RSD of 12.1%. This method was used for absolute quantitation of acid metabolites comparing control and type 1 diabetic urine. Absolute quantitation of organic acids was achieved by using one isobaric lane for standards, thereby allowing for anal. of six urine samples in two injections. Quantified acids showed good agreement with previous work, and six significant changes were found. Overall, this method demonstrated 4-plex absolute quantitation of acids in a complex biol. sample. The experimental process involved the reaction of 3-Hydroxyphenylacetic acid(cas: 621-37-4).Quality Control of 3-Hydroxyphenylacetic acid

The Article related to diabetes urine isobaric plex tagging biol acid lc ms, Placeholder for records without volume info and other aspects.Quality Control of 3-Hydroxyphenylacetic acid

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Pereira-Caro, Gema; Gaillet, Sylvie; Ordonez, Jose Luis; Mena, Pedro; Bresciani, Letizia; Bindon, Keren A.; Del Rio, Daniele; Rouanet, Jean-Max; Moreno-Rojas, Jose Manuel; Crozier, Alan published an article in 2020, the title of the article was Bioavailability of red wine and grape seed proanthocyanidins in rats.Application of 621-37-4 And the article contains the following content:

This study explored plasma levels and urinary and fecal excretion of metabolites and microbial-derived catabolites over a 24 h period following the ingestion of red wine (RWP) or grape seed (GSP) proanthocyanidin-rich extracts by rats. In total, 35 structurally-related (epi)catechin metabolites (SREMs) and 5-carbon side chain ring fission metabolites (5C-RFMs) (phenyl-γ-valerolactones and phenylvaleric acids), and 50 phenolic acid and aromatic catabolites were detected after intakes of both extracts The consumption of the RWP extract, but not the GSP extract, led to the appearance of a ∼200 nmol L-1 peak plasma concentration of SREMs formed from flavan-3-ol monomers. In contrast, ingestion of the GSPs, but not the RWPs, resulted in a substantial increase in microbiota-derived 5-carbon side chain ring fission metabolites (5C-RFMs) in plasma. 5C-RFMs, along with low mol. weight phenolic catabolites were detected in urine after ingestion of both extracts The GSP and RWP extracts had resp. mean degrees of polymerization 5.9 and 6.5 subunits, and the RWP extract had an upper polymer size of 21 subunits compared to 44 subunits for the GSP extract The differences in plasma metabolite profiles might, therefore, be a consequence of this polydispersity impacting on the microbiota-mediated rates of cleavage of the proanthocyanidin subunits and their subsequent metabolism and absorption. Urinary excretion of phenolic catabolites indicated that 11% of RWPs and 7% for GSPs were subjected to microbial degradation In all probability these figures, rather than representing the percentage of proanthocyanidins that are completely degraded, indicate partial cleavage of monomer subunits producing a much higher percentage of shortened proanthocyanidin chains. Obtaining more detailed information on the in vivo fate of proanthocyanidins is challenging because of the difficulties in analyzing unabsorbed parent proanthocyanidins and their partially degraded flavan-3-ol subunit chains in feces. Further progress awaits the development of improved purification and anal. techniques for proanthocyanidins and their use in feeding studies, and in vitro fecal and bacterial incubations, with radio and/or stable isotope-labeled substrates. The experimental process involved the reaction of 3-Hydroxyphenylacetic acid(cas: 621-37-4).Application of 621-37-4

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