Month: December 2022

Galimberti, Maurizio published the artcileThermal stability of ammonium salts as compatibilizers in polymer/layered silicate nanocomposites, Name: 2-Ethyl-N,N-dimethylhexan-1-amine, the publication is e-Polymers (2009), No pp. given, database is CAplus.

Thermal stability of alkyl and arylalkyl quaternary ammonium cation (onium) in starting chloride salt, in organoclay obtained after exchange with montmorillonite (MMT) and after mixing of the organoclay with isoprene rubber was examined using conventional TGA and by mass spectrometry pyrolysis/GC-MS. Degradation was observed to occur at T ¡Ý 170 ¡ãC for organoclays and the main volatile compounds were identified as tertiary amines, chloroalkanes and alkenes. Mechanisms for their formation are proposed and the role of residual onium chloride and basic centers of layered silicate is discussed.

e-Polymers published new progress about 28056-87-3. 28056-87-3 belongs to catalysis-chemistry, auxiliary class Amine,Aliphatic hydrocarbon chain, name is 2-Ethyl-N,N-dimethylhexan-1-amine, and the molecular formula is C10H23N, Name: 2-Ethyl-N,N-dimethylhexan-1-amine.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Wilkinson, Matthew R. published the artcileImages of chemical structures as molecular representations for deep learning, Name: 2-Methylbenzoic acid, the publication is Journal of Materials Research (2022), 37(14), 2293-2303, database is CAplus.

Implementing Artificial Intelligence for chem. applications provides a wealth of opportunity for materials discovery, healthcare and smart manufacturing For such applications to be successful, it is necessary to translate the properties of mols. into a digital format so they can be passed to the algorithms used for smart modeling. The literature has shown a wealth of different strategies for this task, yet there remains a host of limitations. To overcome these challenges, we present two-dimensional images of chem. structures as mol. representations. This methodol. was evaluated against other techniques in both classification and regression tasks. Images unlocked (1) superior augmentation strategies, (2) application of specialist network architectures and (3) transfer learning, all contributing to superior performance and without prior specialised knowledge on cheminformatics required. This work takes advantage of image feature maps which do not rely on chem. properties and so can represent multi-component systems without further property calculations

Journal of Materials Research published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C6H5NO, Name: 2-Methylbenzoic acid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Guilleme, Julia published the artcileDirect Access to Axially Substituted Subphthalocyanines from Trimethylsilyl-Protected Nucleophiles, Related Products of catalysis-chemistry, the publication is Organic Letters (2015), 17(19), 4722-4725, database is CAplus and MEDLINE.

A new synthetic one-step approach to perform the axial ligand exchange reaction in subphthalocyanines that employs trimethylsilyl-protected nucleophiles as starting materials is reported. Theor. calculations indicate that the exchange reaction proceeds through a similar 4-centered ¦Ò-bond metathesis transition state as the substitution with phenols. This direct method allowed us to synthesize new axial derivatives of singular importance within the chem. of subphthalocyanines, for which the reactivity and x-ray crystalline structure were studied.

Organic Letters published new progress about 1206-46-8. 1206-46-8 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Trimethyl(perfluorophenyl)silane, and the molecular formula is C9H9F5Si, Related Products of catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Herrera-Marcos, Luis V. published the artcileHepatic galectin-3 is associated with lipid droplet area in non-alcoholic steatohepatitis in a new swine model, Category: catalysis-chemistry, the publication is Scientific Reports (2022), 12(1), 1024, database is CAplus and MEDLINE.

Non-alc. fatty liver disease (NAFLD) is currently a growing epidemic disease that can lead to cirrhosis and hepatic cancer when it evolves into non-alc. steatohepatitis (NASH), a gap not well understood. To characterize this disease, pigs, considered to be one of the most similar to human exptl. animal models, were used. To date, all swine-based settings have been carried out using rare predisposed breeds or long-term experiments Herein, we fully describe a new exptl. swine model for initial and reversible NASH using cross-bred animals fed on a high saturated fat, fructose, cholesterol, cholate, choline and methionine-deficient diet. To gain insight into the hepatic transcriptome that undergoes steatosis and steatohepatitis, we used RNA sequencing. This process significantly up-regulated 976 and down-regulated 209 genes mainly involved in cellular processes. Gene expression changes of 22 selected transcripts were verified by RT-qPCR. Lipid droplet area was pos. associated with CD68, GPNMB, LGALS3, SLC51B and SPP1, and neg. with SQLE expressions. When these genes were tested in a second experiment of NASH reversion, LGALS3, SLC51B and SPP1 significantly decreased their expression. However, only LGALS3 was associated with lipid droplet areas. Our results suggest a role for LGALS3 in the transition of NAFLD to NASH.

Scientific Reports published new progress about 63-68-3. 63-68-3 belongs to catalysis-chemistry, auxiliary class Natural product, name is (S)-2-Amino-4-(methylthio)butanoic acid, and the molecular formula is C5H11NO2S, Category: catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Nascimento, Madson M. published the artcileDetermination of 3-nitrobenzanthrone, its metabolites, and 41 polycyclic aromatic compounds (16 PAHs, 19 nitro-PAHs, and 6 oxy-PAHs) in ascidians (Phallusia nigra), SDS of cas: 191-07-1, the publication is Microchemical Journal (2022), 107081, database is CAplus.

This work demonstrates an effective solid-liquid extraction procedure, in combination with a microscale dispersive solid-phase extraction cleanup, for the determination of 44 polycyclic aromatic compounds, including the potent mutagenic compound 3-nitrobenzathrone and its metabolites 3-aminobenzanthrone and 3-acethyl-aminobenzanthrone, in Phallusia nigra. A new customized device was constructed using borosilicate glass to perform the ultrasound-assisted extraction of the compounds The dispersive solid-phase extraction cleanup was carried out in a microscale device filter and optimized though multivariate statistical tools. The optimum conditions were determined as 93 mg of activated alumina/silica gel (1:1, weight/weight) and vortex-assisted agitation for 3.50 min. The limit of detection ranged from 5.47 to 9.89 ng g-1, 7.27 to 1,524 ng g-1, and 42.7 to 108 ng g-1 for PAHs, oxy-PAHs, and nitro-PAHs, resp. The ANOVA test (p < 0.05) indicated no evidence of lack-of-fit for the matrix-matched anal. curves, with R2 > 0.990. The recoveries on the DORM-3 reference standard material ranged from 75.3% to 120%, 77.6% to 117%, and 70% to 124% for PAHs, oxy-PAHs, and nitro-PAHs, resp. The developed procedure was applied to nine ascidians samples. PAHs, oxy-PAHs, and nitro-PAHs were detected in the samples at concentrations ranging from 5.02 to 489 ng g-1 dw, 28.8 to 6,587 ng g-1, and 32.3 to 1,635 ng g-1, resp. Thus, the proposed procedure was comprehensive, precise, accurate, and suitable for the determination of these compounds in ascidians samples.

Microchemical Journal published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C24H12, SDS of cas: 191-07-1.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Calixto-Rodriguez, M. published the artcileStructural, optical, and electrical properties of tin sulfide thin films grown by spray pyrolysis, Application In Synthesis of 6972-05-0, the publication is Thin Solid Films (2009), 517(7), 2497-2499, database is CAplus.

Sn sulfide (SnS) thin films have been prepared by spray pyrolysis (SP) technique using Sn chloride and N,N-dimethylthiourea as precursor compounds Thin films prepared at different temperatures have been characterized using several techniques. X-ray diffraction studies showed that substrate temperature (T _s) affects the crystalline structure of the deposited material as well as the optoelectronic properties. The calculated optical band gap (E_g) value for films deposited at T_s = 320-396¡ã was 1.70 eV (SnS). Addnl. phases of SnS₂ at 455¡ã and SnO₂ at 488¡ã were formed. The measured elec. resistivity value for SnS films was ?1 ¡Á 10⁴ ¦¸-cm.

Thin Solid Films published new progress about 6972-05-0. 6972-05-0 belongs to catalysis-chemistry, auxiliary class Thiourea,Amine,Aliphatic hydrocarbon chain,Amide, name is 1,1-Dimethylthiourea, and the molecular formula is C3H8N2S, Application In Synthesis of 6972-05-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Menci, Ruggero published the artcileSupplementing goats’ diet with sainfoin pellets (versus alfalfa) modifies cheese sensory properties and fatty acid profile, Recommanded Product: Docosahexaenoic Acid, the publication is International Dairy Journal (2022), 105398, database is CAplus.

In two different goat farms, producing Picodon and Mutschli cheese resp., two groups of lactating goats were fed alfalfa pellets (ALF) or sainfoin pellets (SNF) for 6 wk. The cheeses produced at the end of the trial were analyzed for sensory properties, composition, fatty acid profile, proteolysis, and rheol. The SNF Picodon had higher ”goat” and ”farm” aroma and odor, and higher bitter taste, compared with the ALF Picodon. The SNF Picodon showed lower dry matter than the ALF Picodon, leading to differences in texture and mouthfeel. The SNF Mutschli had a different mouthfeel than the ALF Mutschli. In a triangle test, consumers were able to perceive a difference in both Picodon and Mutschli between ALF and SNF groups. In both Picodon and Mutschli, feeding sainfoin increased cheese proteolysis and modified cheese fatty acid profile, resulting in higher polyunsaturated fatty acids proportion and lower n-6/n-3 ratio.

International Dairy Journal published new progress about 6217-54-5. 6217-54-5 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Aliphatic hydrocarbon chain,Metabolic Enzyme,RAR/RXR,Natural product, name is Docosahexaenoic Acid, and the molecular formula is C22H32O2, Recommanded Product: Docosahexaenoic Acid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Webb, Nicola J. published the artcileRhodium(III)-Catalyzed C-H Activation/Annulation with Vinyl Esters as an Acetylene Equivalent, Formula: C6H12F3NO5S, the publication is Organic Letters (2014), 16(18), 4718-4721, database is CAplus and MEDLINE.

The behavior of electron-rich alkenes in rhodium-catalyzed C-H activation/annulation reactions is investigated. Vinyl acetate emerges as a convenient acetylene equivalent, facilitating the synthesis of sixteen 3,4-unsubstituted isoquinolones, as well as select heteroaryl-fused pyridones. E.g., in presence of [Cp^*RhCl₂]₂ and CsOAc in MeOH, reaction of 4-NCC₆H₄CONHOPiv with vinyl acetate gave 81% isoquinolone derivative (I). The complementary regiochem. preferences of enol ethers vs. enol esters/enamides is discussed.

Organic Letters published new progress about 1293990-73-4. 1293990-73-4 belongs to catalysis-chemistry, auxiliary class Aliphatic Chain, name is O-Pivaloylhydroxylamine trifluoromethanesulfonate, and the molecular formula is C9H10O3S, Formula: C6H12F3NO5S.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Haglund, Aasa C. published the artcileHydrophobic and polar contributions to solute affinity for a highly crosslinked water-swollen (sephadex) gel, SDS of cas: 6972-05-0, the publication is Journal of Polymer Science, Polymer Letters Edition (1980), 18(4), 271-9, database is CAplus.

Adsorption affinity was studied on Sephadex gels, which are commonly used in gel chromatog. The studies support the hypothesis of a hydrophobic interaction in the adsorption of nonpolar and weakly polar aliphatic solutes, suggest that ¦Ð electrons in the solute promote affinity, suggest that a reduced affinity in hydroxyl derivatives of paraffins is caused by lowered hydrophobicity due to the polarity of the OH group, show that there are stringent demands on solute structure if mol. sieve behavior is to be manifest, and also show that, whereas the gel has an affinity for hydrocarbons, both aliphatic and aromatic, it does not prefer the latter; a higher aromatic affinity requires an addnl. condition. The studies included distribution coefficients, heat of adsorption, entropy of adsorption, and free energy of adsorption. The compounds studied included hydrocarbons, aldehydes, alcs., phenols, ketone, amides, urea derivatives, and thiourea derivatives

Journal of Polymer Science, Polymer Letters Edition published new progress about 6972-05-0. 6972-05-0 belongs to catalysis-chemistry, auxiliary class Thiourea,Amine,Aliphatic hydrocarbon chain,Amide, name is 1,1-Dimethylthiourea, and the molecular formula is C3H8N2S, SDS of cas: 6972-05-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Wang, Qiang published the artcileFormation of nickel-thiolate aggregates via reaction with CH₂Cl₂, Synthetic Route of 22693-41-0, the publication is Chemical Communications (Cambridge, United Kingdom) (2003), 2776-2777, database is CAplus and MEDLINE.

Reaction of newly prepared Ni-dithiolate complex [Ni(L¹)(dppe)] with CH₂Cl₂ affords the novel pentanuclear complex [Ni₅Cl₂(L¹)₄(dppe)₂] (1) (H₂L¹ = 1,2-mercaptomethyl-3,4-dimethylbenzene), while [Ni(L¹)(dcpe)] (dcpe = 1,2-bis(cyclohexylphosphino)ethane) reacts with CH₂Cl₂ to give binuclear [Ni₂Cl₂(L²)(dcpe)₂] (2) in which two L¹ units are linked through a sulfur by a methylene group derived from CH₂Cl₂ to form L² (H₂L = I). 1 And 2 are characterized by crystal structure anal. When [NiCl₂(PP)] (PP = dppe, dcpe) is reacted with 2,4,6-triisopropylthiophenol (HL³) or 2-mercaptomethylbenzenethiol (H₂L⁴) n the presence of NaOMe in MeOH, the corresponding mononuclear Ni thiolate complexes [Ni(L³)₂(PP)] and [Ni(L³)(PP)] were obtained.

Chemical Communications (Cambridge, United Kingdom) published new progress about 22693-41-0. 22693-41-0 belongs to catalysis-chemistry, auxiliary class Other Functionalization Reagent, name is 2,4,6-Triisopropylbenzenethiol, and the molecular formula is C11H8N2O2, Synthetic Route of 22693-41-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia