Month: October 2022

Guo, Huan; Yuan, Qin; Fu, Yuan; Liu, Wen; Su, Ya-Hong; Liu, Hui; Wu, Chao-Yi; Zhao, Li; Zhang, Qing; Lin, De-Rong; Chen, Hong; Qin, Wen; Wu, Ding-Tao published the artcile< Extraction optimization and effects of extraction methods on the chemical structures and antioxidant activities of polysaccharides from snow chrysanthemum (Coreopsis tinctoria)>, SDS of cas: 3458-28-4, the main research area is coreopsis polysaccharide uronic acid monosaccharide antioxidant UAE MAE; Coreopsis tinctoria; antioxidant activity; chemical structure; extraction optimization; polysaccharide.

In order to explore snow chrysanthemum polysaccharides (SCPs) as functional food ingredients and natural antioxidants for industrial applications, both microwave-assisted extraction (MAE) and ultrasonic-assisted extraction (UAE) were firstly optimized for the extraction of SCPs. Furthermore, the effects of conventional hot water extraction, UAE, and MAE on the chem. structures and antioxidant activities of SCPs were investigated. The maximum extraction yields of SCPs extracted by UAE (4.13 ± 0.24%) and MAE (4.26 ± 0.21%) were achieved at the optimized extraction parameters as follows: ultrasound amplitude (68%) and microwave power (500 W), ultrasound extraction time (21 min) and microwave extraction time (6.5 min), and ratio of liquid to raw material (42.0 mL/g for UAE and 59.0 mL/g for MAE). In addition, different extraction methods significantly affected the contents of uronic acids, the mol. weights, the molar ratio of constituent monosaccharides, and the degree of esterification of SCPs. SCPs exhibited remarkable DPPH (IC50 = 1.702 mg/mL), ABTS (IC50 = 1.121 mg/mL), and nitric oxide (IC50 = 0.277 mg/mL) radical scavenging activities, as well as reducing power (= 80.17 ± 4.8μg Trolox/mg), which suggested that SCPs might be one of the major contributors toward the antioxidant activities of snow chrysanthemum tea. The high antioxidant activities (DPPH, IC50 = 0.693 mg/mL; ABTS, IC50 = 0.299 mg/mL; nitric oxide, IC50 = 0.105 mg/mL; and reducing power, 127.79 ± 2.57μg Trolox/mg) observed in SCP-M extracted by the MAE method might be partially attributed to its low mol. weight and high content of unmethylated galacturonic acids. Results suggested that the MAE method could be an efficient technique for the extraction of SCPs with high antioxidant activity, and SCPs could be further explored as natural antioxidants for industrial application.

Polymers (Basel, Switzerland) published new progress about Antioxidants. 3458-28-4 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H12O6, SDS of cas: 3458-28-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Gabriel, Christopher M.; Lee, Nicholas R.; Bigorne, Florence; Klumphu, Piyatida; Parmentier, Michael; Gallou, Fabrice; Lipshutz, Bruce H. published the artcile< Effects of Co-solvents on Reactions Run under Micellar Catalysis Conditions>, Name: 2-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine, the main research area is cosolvent water micelle organic reaction TPGS750M green E factor.

The impact of varying percentages of an organic solvent added to reactions run in aqueous nanomicelles as the reaction medium was studied. Issues such as rates of reaction, percent conversion, and yield, as well as various practical aspects (e.g., effect on stirring, etc.), are discussed, leading to an operationally simple method for the general improvement of potentially problematic systems across a broad range of reaction types, in particular for reactions run at scale.

Organic Letters published new progress about Amidation. 660867-80-1 belongs to class alcohols-buliding-blocks, and the molecular formula is C12H18BNO2, Name: 2-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Tan, Zhenda; Ci, Chenggang; Yang, Jian; Wu, Yang; Cao, Liang; Jiang, Huanfeng; Zhang, Min published the artcile< Catalytic Conversion of N-Heteroaromatics to Functionalized Arylamines by Merging Hydrogen Transfer and Selective Coupling>, HPLC of Formula: 5344-90-1, the main research area is azaarene alkyl bromide amino arylmethanol ruthenium hydrogen transfer coupling; alkylaminoaryl methylazaarene preparation chemoselective.

A ruthenium-catalyzed deconstruction of N-heteroaromatics to functionalized arylamines with 2-aminoaryl methanols via hydrogen transfer and selective coupling was reported. The reaction was achieved via sequential functionalization of the β and α-sites of the initially formed N-heteroarenium salts followed by a C-N cleavage, proceeding with the striking features of broad substrate scope, excellent functional groups tolerance, high chemoselectivity and atom-efficiency, and applicable for streamline synthesis of some biomedical mols. The strategy utilized will pave the avenues for further development of catalytic transformations of inert organo-systems to functional frameworks.

ACS Catalysis published new progress about Amino alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 5344-90-1 belongs to class alcohols-buliding-blocks, and the molecular formula is C7H9NO, HPLC of Formula: 5344-90-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kiourtzidis, Mikis; Kuehn, Julia; Brandsch, Corinna; Stangl, Gabriele I. published the artcile< Vitamin d status of mice deficient in scavenger receptor class B Type 1, cluster determinant 36 and ATP-binding cassette proteins G5/G8>, Recommanded Product: (3S,9S,10R,13R,14R,17R)-10,13-Dimethyl-17-((R)-6-methylheptan-2-yl)-2,3,4,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol, the main research area is kidney liver heart vitamin D Srb1 Cd36 Abcg5; ATP-binding cassette transporters G5/G8; cluster determinant 36; mice; scavenger receptor class B type 1; vitamin D.

Classical lipid transporters are suggested to modulate cellular vitamin D uptake. This study investigated the vitamin D levels in serum and tissues of mice deficient in SR-B1 (Srb1-/-), CD36 (Cd36-/-) and ABC-G5/G8 (Abcg5/g8-/-) and compared them with corresponding wild-type (WT) mice. All mice received triple-deuterated vitamin D3 (vitamin D3-d3) for six weeks. All knockout mice vs. WT mice showed specific alterations in their vitamin D concentrations Srb1-/- mice had higher levels of vitamin D3-d3 in the serum, adipose tissue, kidney and heart, whereas liver levels of vitamin D3-d3 remained unaffected. Addnl., Srb1-/- mice had lower levels of deuterated 25-hydroxyvitamin D3 (25(OH)D3-d3) in the serum, liver and kidney compared to WT mice. In contrast, Cd36-/- and WT mice did not differ in the serum and tissue levels of vitamin D3-d3, but Cd36-/- vs. WT mice were characterized by lower levels of 25(OH)D3-d3 in the serum, liver and kidney. Finally, Abcg5/g8-/- mice tended to have higher levels of vitamin D3-d3 in the serum and liver. Major alterations in Abcg5/g8-/- mice were notably higher levels of 25(OH)D3-d3 in the serum and kidney, accompanied by a higher hepatic mRNA abundance of Cyp27a1 hydroxylase. To conclude, the current data emphasize the significant role of lipid transporters in the uptake, tissue distribution and activation of vitamin D.

Nutrients published new progress about Adipose tissue. 434-16-2 belongs to class alcohols-buliding-blocks, and the molecular formula is C27H44O, Recommanded Product: (3S,9S,10R,13R,14R,17R)-10,13-Dimethyl-17-((R)-6-methylheptan-2-yl)-2,3,4,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chaudhuri, Susri Ray; Modak, Arindam; Bhaumik, Asim; Swarnakar, Snehasikta published the artcile< Phloroglucinol derivatives as potential anti-ulcer compound that inhibits matrix metalloproteinase-9>, Related Products of 4396-13-8, the main research area is antiulcer phloroglucinol derivative matrix metalloproteinase 9 gastric ulceration.

Three phloroglucinol based polyphenolic compounds have been synthesized and their potential efficacy against gastric ulceration in mice was investigated. Polyphenol (I, II, III) were synthesized through Vilsmeier-Haack formylation, Schiff-base condensation of diformyl- phloroglucinol with 4-amino salicylic acid and Duff formylation reactions resp. We administered indomethacin, a non-steroidal anti inflammatory drug (NSAID), to induce gastric ulceration in Balb/c mice and tested antiulcer efficacy of synthesized phloroglucinol derivatives The pathogenesis of NSAID-induced ulceration is known to be associated to upregulation of matrix metalloproteinase (MMP)-9. All derivatives of phloroglucinol were found to prevent gastric ulceration in mice through depletion of oxidative stress in gastric tissue. Phloroglucinol derivatives also possessed antioxidant activity and they suppressed antioxidant enzymes in gastric tissues to almost normalcy during gastroprotection. Compound III was found to be most efficient anti-ulcer agent among others that inhibited the MMP-9 activity near to control value during prevention of NSAID-induced gastric ulceration. Thus, new polyphenolic compounds derived from phloroglucinol have antioxidant as well as anti-ulcer activity. We conclude that phloroglucinol derivatives as potent anti-ulcer compound in prevention of indomethacin induced gastric ulceration via attenuation of MMP-9 activity.

International Journal of Pharmaceutical Applications published new progress about Antioxidants. 4396-13-8 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H6O5, Related Products of 4396-13-8.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chen, Qincao; Zhu, Yin; Dai, Weidong; Lv, Haipeng; Mu, Bing; Li, Pengliang; Tan, Junfeng; Ni, Dejiang; Lin, Zhi published the artcile< Aroma formation and dynamic changes during white tea processing>, Product Details of C10H18O, the main research area is aroma compound white tea withering drying; Amino acid; Aroma; GC × GC-TOFMS; Glycosidically bound volatile; White tea.

The formation of and dynamic changes in aroma during white tea processing have not previously been systematically investigated. In this study, advanced comprehensive two-dimensional gas chromatog.-time-of-flight mass spectrometry was employed to investigate the mechanism of white tea aroma formation. A total of 172 volatiles were identified and mainly comprising endogenous volatiles, which displayed diverse change trends during the withering period. In this process, free aroma precursor amino acids and glycosidically bound volatiles (GBVs) were found to contribute to the formation of white tea aroma, with the differential expression of aroma-related key genes accounting for various accumulation of endogenous volatiles and GBVs. In addition, the drying was also shown to play an important role in the formation of white tea aroma. Our study provides the first characterization of white tea aroma formation and establishes a theor. basis for quality control during white tea processing operations.

Food Chemistry published new progress about Drying process. 78-70-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C10H18O, Product Details of C10H18O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Soares da Costa, Diana; Sousa, Joao C.; Da Mesquita, Sandro; Petkova-Yankova, Nevena I.; Marques, Fernanda; Reis, Rui L.; Sousa, Nuno; Pashkuleva, Iva published the artcile< Bioorthogonal labeling reveals different expression of glycans in mouse hippocampal neuron cultures during their development>, Related Products of 5505-63-5, the main research area is glycan hippocampus neuron cell maturation glucose metabolism; glycosylation, biorthogonal chemistry, neuronal development, imaging..

The expression of different glycans at the cell surface dictates cell interactions with their environment and other cells, being crucial for the cell fate. The development of the central nervous system is associated with tremendous changes in the cell glycome that is tightly regulated. Herein, we have employed bioorthogonal Cu-free click chem. to image temporal distribution of different glycans in live mouse hippocampal neurons during their maturation in vitro. We show development-dependent glycan patterns with increased fucose and decreased mannose expression at the end of the maturation process. We also demonstrate that this approach is biocompatible and does not affect glycan transport although it relies on an administration of modified glycans. The applicability of this strategy to tissue sections unlocks new opportunities to study the glycan dynamics under more complex physiol. conditions.

Molecules published new progress about Carbohydrate transporters Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 5505-63-5 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H14ClNO5, Related Products of 5505-63-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Hazra, Anindita; Das, Susmita published the artcile< Comparative metabolomics analysis and radical scavenging activity of Saraca asoca (Roxb.) de wilde flowers in different stages of maturity>, HPLC of Formula: 87-73-0, the main research area is Saraca flower maturity metabolomics radical scavenging.

The flower extracts of Saraca asoca were evaluated in their three different phenol. stages of flowering [bud (S1), mature (S2) and senescent (S3)] in terms of chem. composition and antioxidant activity. The GC/MS based fingerprinting led to identification of 85 metabolites, including 9 amino acids, 20 organic acids, 7 fatty acids, 20 sugar and sugar acids, 8 sugar alcs., 13 phenols and phenolic acids and 8 others compounds The three flowering stages showed prominent changes in their metabolite profile during the process of maturation of the flowering stages from bud to mature to senescence stages determined via GC/MS based metabolomics and chemometric approaches. The amounts and composition of metabolites in each stage showed statistically significant differences, which were reflected in their antioxidant capacities. The three phenol. stages showed antioxidant activities in a dose dependent manner, but the senescent stage showed highest superoxide radical scavenging activity (IC50 = 65.17 ± 2.647 mg/mL) and metal chelating effect (6.65 ± 0.331 mg/mL) in agreement with their high content of phenolic acids. These differences were strongly reproduced in the chemometric analyses (PCA, PLS-DA and s-PLS-DA), identifying the most distinctive features of the three flowering stages. This study might be beneficial to select the most potent flowering stage for incorporation in functional food.

Jordan Journal of Biological Sciences published new progress about Alditols Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 87-73-0 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H10O8, HPLC of Formula: 87-73-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Yuan, Li; Zhou, Mengmeng; Huang, Dawei; Wasan, Harpreet S; Zhang, Kai; Sun, Leitao; Huang, Hong; Ma, Shenglin; Shen, Minhe; Ruan, Shanming published the artcile< Resveratrol inhibits the invasion and metastasis of colon cancer through reversal of epithelial‑ mesenchymal transition via the AKT/GSK‑3β/Snail signaling pathway.>, Quality Control of 501-36-0 , the main research area is .

The identification of safe and effective drugs that inhibit tumor invasion and metastasis is required to improve the clinical outcome of patients with colon cancer. The present study aimed to investigate the inhibitory effects and possible mechanisms of action of resveratrol against the invasion and metastasis of colon cancer. AKT1‑knockdown SW480 and SW620 colon cancer cells were used to detect the effects of resveratrol on cell invasion and metastasis, as well as changes in the expression of epithelial‑mesenchymal transition (EMT) markers and serine/threonine kinase (AKT)/glycogen synthase kinase (GSK)‑3β/Snail signaling pathway‑related molecules in vitro. Furthermore, nude mice were inoculated with SW480 cells in the tail vein to establish an in vivo lung metastasis model of colon cancer, to investigate the effects of resveratrol on lung metastasis in colon cancer. The results revealed that resveratrol treatment and AKT1 knockdown significantly inhibited cell migration and invasion in colon cancer, and markedly increased E‑cadherin expression and decreased that of N‑cadherin, phospho (p)‑AKT1, p‑GSK‑3β, and Snail in colon cancer both in vitro and in vivo. Furthermore, the effects of resveratrol were significantly weaker in the AKT1‑knockdown cells. In conclusion, resveratrol may suppress the invasion and metastasis of colon cancer through reversal of EMT via the AKT/GSK‑3β/Snail signaling pathway. AKT1 may therefore be a key regulator of EMT in colon cancer cells and a potential therapeutic target for this disease.

Molecular medicine reports published new progress about 501-36-0 . 501-36-0 belongs to class alcohols-buliding-blocks, and the molecular formula is C14H12O3, Quality Control of 501-36-0 .

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Molaei, Somayeh; Ghadermazi, Mohammad published the artcile< Heterogeneously catalyzed selective aerobic oxidation of sulfides with supported Dy on SBA-15 as recyclable catalyst under green condition>, COA of Formula: C8H10OS, the main research area is dysprosium oxopyrrolidine carboxylic acid silica catalyst sulfide green oxidation.

This manuscript presents a simple, efficient and environmentally benign room temperature aerobic catalytic process to the selective oxidation of sulfides to sulfoxides by Dy (III)-substituted 5-oxopyrrolidine-2-carboxylic acid (Glp) immobilized on SBA-15(SBA-15-Glp-Dy). The catalyst could be reused seven cycles without any loss in performance. This is the first selective aerobic oxidation of sulfides using a Dy-based heterogeneous system.

Solid State Sciences published new progress about Green chemistry. 699-12-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H10OS, COA of Formula: C8H10OS.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts