Catalysis-chemistry

Brown, Robert W. published the artcileNutrient (C, N and P) enrichment induces significant changes in the soil metabolite profile and microbial carbon partitioning, Name: Docosahexaenoic Acid, the publication is Soil Biology & Biochemistry (2022), 108779, database is CAplus.

The cycling of soil organic matter (SOM) and carbon (C) within the soil is governed by the presence of key macronutrients, particularly nitrogen (N) and phosphorus (P). The relative ratio of these nutrients has a direct effect on the potential rates of microbial growth and nutrient processing in soil and thus is fundamental to ecosystem functioning. However, the effect of changing soil nutrient stoichiometry on the small organic mol. (i.e., metabolite) composition and cycling by the microbial community remains poorly understood. Here, we aimed to disentangle the effect of stoichiometrically balanced nutrient addition on the soil metabolomic profile and apparent microbial carbon use efficiency (CUE) by adding a labile C source (glucose) in combination with N and/or P. After incorporation of the added glucose into the microbial biomass (48 h), metabolite profiling was undertaken by ultra-performance liquid chromatog.-tandem mass spectrometry (UPLC-MS/MS). 494 metabolites were identified across all treatments mainly consisting of lipids (n = 199), amino acids (n = 118) and carbohydrates (n = 43), >97% of which showed significant changes in concentration between at least one treatment. Overall, glucose-C addition generally increased the synthesis of other carbohydrates in soil, while addition of C and N together increased peptide synthesis, indicative of protein formation and turnover. The combination of C and P significantly increased the number of fatty acids synthesized. There was no significant change in the PLFA-derived microbial community structure or microbial biomass following C, N and P addition Further, N addition led to an increase in glucose-C partitioning into anabolic processes (i.e., increased CUE), suggesting the microbial community was N, but not P limited. Based on the metabolomic profiles observed here, we conclude that inorganic nutrient enrichment causes substantial shifts in both primary and secondary metabolism within the microbial community, leading to changes in resource flow and thus soil functioning, however, the microbial community illustrated significant metabolic flexibility.

Soil Biology & Biochemistry 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, Name: Docosahexaenoic Acid.

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

Sefi, Mediha published the artcileAntioxidant role of selenium against maneb-induced cardiotoxicity in mice, Quality Control of 6217-54-5, the publication is Environmental Science and Pollution Research (2022), 29(36), 54827-54841, database is CAplus and MEDLINE.

The current study was conducted to assess the beneficial effect of selenium (Se) on maneb-induced cardiotoxicity and fatty acid alterations in adult mice. Swiss albino male mice were assigned into four exptl. groups. The first group consisted of neg. controls. The second group represented the pos. controls where mice received daily, via the diet, sodium selenite at a dose of 0.2 mg/kg. For the third group, mice were subjected to i.p. injections of maneb (30 mg/kg BW). The fourth group (MB+Se) received daily the same dose of maneb as group 3 along with sodium selenite at the same dose as group 2. Mice exposure to maneb caused cardiotoxicity as indicated by an increase in malondialdehyde, hydrogen peroxide, and protein carbonyl levels, and an alteration of the antioxidant defense system (catalase, glutathione peroxidase, superoxide dismutase, glutathione, and vitamin C). Plasma lactate dehydrogenase activity and total cholesterol, triglyceride, and low-d. lipoprotein cholesterol levels increased, while high-d. lipoprotein cholesterol level decreased. Results showed also a decrease in the amount of n-3 PUFA, docosahexaenoic, docosapentaenoic, and eicosapentaenoic acids. However, an increase in the levels of MUFA, cis-vaccenic, and palmitoleic acids was observed Co-administration of Se restored the parameters indicated above to near control values. The histopathol. findings confirmed the biochem. results. Selenium could be a useful and efficient agent against maneb-induced cardiotoxicity.

Environmental Science and Pollution Research 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 C9H8BNO2, Quality Control of 6217-54-5.

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

Jiang, Bo published the artcileGreen fabrication of hierarchically-structured Pt/bio-CeO₂ nanocatalysts using natural pollen templates for low-temperature CO oxidation, Related Products of catalysis-chemistry, the publication is Molecular Catalysis (2022), 112251, database is CAplus.

Herein, natural rape pollen was utilized as biotemplates to synthesize hierarchically structured bio-CeO₂ and the supported M/bio-CeO₂ nanocatalysts (M = Pt, Pd, Au, and Ag). Under the optimal synthetic conditions, the resultant bio-CeO₂ could fully maintain the hierarchically porous morphol. of the rape pollen template, with a high specific BET surface area of 71 m² g^-1, much higher than the com. CeO₂ (7.7 m² g^-1). Among the different supported M/bio-CeO₂ catalysts, the Pt/bio-CeO₂ exhibited the best CO oxidation performance with good oxidative catalytic activity and stable performance in five consecutive recycling experiments In-situ DRIFTS demonstrated that the linearly adsorbed CO-Pt⁰ was more stable than CO-Pt^¦Ò+ (especially at high temperature), and the Pt⁰ site (51% in the total amount of Pt) was more active than the Pt^¦Ò+ site (49%) for CO oxidation Furthermore, the DFT calculations suggested the varied CO oxidation mechanisms over the supported nanocatalysts which are depending on the loaded metals associated with both geometric and electronic perspectives.

Molecular Catalysis published new progress about 13822-56-5. 13822-56-5 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is 3-(Trimethoxysilyl)propan-1-amine, and the molecular formula is C6H17NO3Si, Related Products of catalysis-chemistry.

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

Schwalm, Cristiane S. published the artcileMetal halide hydrates as Lewis acid catalysts for the conjugated Friedel-Crafts reactions of indoles and activated olefins, Safety of 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, the publication is Journal of the Brazilian Chemical Society (2011), 22(4), 623-636, database is CAplus.

Metal halide hydrates, such as SnCl₂.2H₂O, MnCl₂.4H₂O, SrCl₂.6H₂O, CrCl₃.6H₂O, CoCl₂.6H₂O, and CeCl₃.7H₂O, were investigated as mild Lewis acid catalysts for the conjugate Friedel-Crafts reaction between indoles and activated olefins. The reactions were carried out with aliphatic unsaturated ketones over a period of days at room temperature, while chalcones reacted only under reflux conditions. The reactions with nitrostyrenes were either performed in solvent or under solventless conditions. In all cases reasonable to good yields were obtained.

Journal of the Brazilian Chemical Society published new progress about 4230-93-7. 4230-93-7 belongs to catalysis-chemistry, auxiliary class Alkenyl,Nitro Compound,Benzene,Ether, name is 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, and the molecular formula is C11H10N4, Safety of 1,2-Dimethoxy-4-(2-nitrovinyl)benzene.

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

Stolarova, Monika published the artcile¦Ï-Phenylenedioxydiacetate complexes of Gd(III) and Ce(III): syntheses, crystal structures, and magnetic properties, Recommanded Product: 2,2-(1,2-Phenylenebis(oxy))diacetic acid, the publication is Journal of Coordination Chemistry (2014), 67(6), 1046-1060, database is CAplus.

{[Ln₂(PDOA)₃(H₂O)₆]?2H₂O}_n (Ln = Gd, 1; Ln = Ce, 2; H₂PDOA = ¦Ï-phenylenedioxydiacetic acid) has been synthesized and characterized by chem. analyses, IR spectroscopy, and thermal analyses. Single-crystal X-ray structure analyses revealed that both 1 and 2 are polymeric and built up of a ladder-like arrangement of Ln(III) ions linked by short syn-anti carboxylate bridges and long bridges (legs of the ladder) formed by a second crystallog. independent PDOA. Ln(III) in both 1 and 2 is nine-coordinate with an O₉ donor set formed by one chelating/bridging and one bridging PDOA, and an addnl. three waters. In the asym. unit, there is one crystallog. independent water of crystallization, which is involved in a rich system of hydrogen bonds of the O-H¡¤¡¤¡¤O type. The identities of the bulk and single crystal phases were corroborated by powder X-ray diffraction. Variable temperature (2-300 K) magnetic studies indicate the presence of only weak antiferromagnetic interactions between pairs of paramagnetic Ln(III) ions with J/hc = -0.004 and -0.13 cm^-1, for 1 and 2.

Journal of Coordination Chemistry published new progress about 5411-14-3. 5411-14-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2,2-(1,2-Phenylenebis(oxy))diacetic acid, and the molecular formula is C10H7NO3, Recommanded Product: 2,2-(1,2-Phenylenebis(oxy))diacetic acid.

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

Stolarova, Monika published the artcileTwo novel coordination polymers in the family of lanthanide complexes with o-phenylenedioxydiacetato as ligand, Synthetic Route of 5411-14-3, the publication is Polyhedron (2015), 149-155, database is CAplus.

Two novel coordination polymers [Ce(PDOA)(NO₃)(H₂O)₂]_n (1) and {[Ce(PDOA)(NO₃)(H₂O)₃]¡¤H₂O}_n (2) (PDOA = o-phenylenedioxydiacetato) have been prepared using hydrothermal conditions and have been structurally characterized. In both crystal structures 1 and 2 the Ce(III) atoms are decacoordinated by oxygen atoms from PDOA ligands with chelating and bridging functions, chelating nitrato ligands and aqua ligands. While in 1 the PDOA ligand presents a hexadentate coordination mode, in 2 it is coordinated in a pentadentate manner; this difference leads to different types of one-dimensional structural motifs: in 2 there are zig-zag chains of the -Ce-O-C-O-Ce- type with syn-anti carboxylate bridges and in 1 these chains are addnl. interlinked by further syn-anti carboxylate bridges leading to a strip- or ribbon-like arrangement formed of {Ce₃} fused triangles. The endothermic dehydration of 1 within the temperature range 69-199 ¡ãC is at least a two-step process as suggested by TG and DTA methods. A variable temperature (2-300 K) magnetic study reveals Curie-Weiss behavior for 1 with ¦È = -35.5 K observed above 50 K. The origin of the observed behavior is discussed.

Polyhedron published new progress about 5411-14-3. 5411-14-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2,2-(1,2-Phenylenebis(oxy))diacetic acid, and the molecular formula is C11H16BNO3, Synthetic Route of 5411-14-3.

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

Lopez Cisneros, Carmen Lucia published the artcileStudy of a Selected Series of 3- and 4-Arylcoumarins as Antifungal Agents against Dermatophytic Fungi: T. rubrum and T. mentagrophytes, Formula: C8H7NO4, the publication is ChemistrySelect (2021), 6(37), 9981-9989, database is CAplus.

The main etiol. agents in dermatophytosis of human skin and nails are Trichophyton, in particular Trichophyton rubrum (T. rubrum) and Trichophyton mentagrophytes (T. mentagrophytes). A new series of twenty-three 3- and 4-arylcoumarins was synthesized and the antifungal activities against clin. isolates of T. rubrum and T. mentagrophytes were evaluated. Sixteen out of twenty-three mols. exhibited antifungal activity against one or both fungi strains. In some cases, the activity against T. rubrum has been comparable to fluconazole, one of the standards, being 8-methoxy-3-(4¡ä-nitrophenyl)coumarin (16) the best compound within this series (min. inhibitory concentration, MIC=6.25 ¦¬g/mL). The preliminary structure-activity relationship study showed that the antifungal activity depends on the position and nature of the substitution patterns. The cytotoxicity of eleven compounds on D-384 (astrocytoma), A-549 (lung cancer) and RKO (colorectal cancer) cell lines was also performed. With the aim of deeply understand the potential of these mols. as hits to develop new drugs, the theor. absorption, distribution, metabolism and excretion (ADME) properties of the active compounds were calculated

ChemistrySelect published new progress about 104-03-0. 104-03-0 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Carboxylic acid,Benzene, name is 4-Nitrophenylacetic acid, and the molecular formula is C8H7NO4, Formula: C8H7NO4.

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

Bruno, Claudio published the artcileThe chemosensitizing agent lubeluzole binds calmodulin and inhibits Ca²⁺/calmodulin-dependent kinase II, SDS of cas: 140-28-3, the publication is European Journal of Medicinal Chemistry (2016), 36-45, database is CAplus and MEDLINE.

An affinity capillary electrophoresis (ACE) method to estimate apparent dissociation constants between bovine brain calmodulin (CaM) and nonpeptidic ligands was developed. The method was validated reproducing the dissociation constants of a number of well-known CaM ligands. In particular, the potent antagonist 125-C9 was ad hoc synthesized through an improved synthetic procedure. The ACE method was successfully applied to verify CaM affinity for lubeluzole, a well-known neuroprotective agent recently proved useful to potentiate the activity of anticancer drugs. Lubeluzole was slightly less potent than 125-C9 (K_d = 2.9¡À0.7 and 0.47¡À0.06 ¦ÌM, resp.) and displayed Ca²⁺/calmodulin-dependent kinase II (CaMKII) inhibition (IC₅₀ = 40¡À1 ¦ÌM). Possible binding modes of lubeluzole to CaM were explored by docking studies based on the x-ray crystal structures of several trifluoperazine-CaM complexes. An estimated dissociation constant in good agreement with the exptl. one was found and the main aminoacidic residues and interactions contributing to complex formation were highlighted. The possibility that interference with Ca²⁺ pathways may contribute to the previously observed chemosensitizing effects of lubeluzole on human ovarian adenocarcinoma and lung carcinoma cells are discussed.

European Journal of Medicinal Chemistry published new progress about 140-28-3. 140-28-3 belongs to catalysis-chemistry, auxiliary class Benzenes, name is N1,N2-Dibenzylethane-1,2-diamine, and the molecular formula is C16H20N2, SDS of cas: 140-28-3.

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

Verardo, Giancarlo published the artcileRevisitation of the reaction between aniline and formaldehyde. Observation of a stable monomeric N-methylene aromatic amine, Application In Synthesis of 2909-77-5, the publication is Journal of the Chemical Society, Chemical Communications (1985), 1787-8, database is CAplus.

Reaction of 2,6-(Me₂CH)₂C₆H₃NH₂ with poly(oxymethylene) (I) at ?100¡ã gave 2,6-(Me₂CH)₂C₆H₃N:CH₂ (II), characterized by spectroscopic and anal. data. Hydrolysis, reduction, and acetylation reactions of II are reported. Analogous reaction of I with 2,6-Me₂C₆H₃NH₂ gave an equilibrium mixture of 2,6-Me₂C₆H₃N:CH₂ and an oligomeric species.

Journal of the Chemical Society, Chemical Communications published new progress about 2909-77-5. 2909-77-5 belongs to catalysis-chemistry, auxiliary class Amine,Benzene, name is 2,6-Diisopropyl-N,N-dimethylaniline, and the molecular formula is C7H10O4, Application In Synthesis of 2909-77-5.

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

Stoica, Ligia published the artcileSeparation of recovery by flotation of molybdenum from residual waters, Recommanded Product: Dodecylamineacetate, the publication is Revistade Chimie (Bucharest, Romania) (1990), 41(7-8), 586-90, database is CAplus.

The flotation recovery of Mo from wastewaters containing 10-150 mg MoO₄^2- was optimized by using Fe(OH)₃ as a carrier and laurylamine acetate and romegal as a collector. The recovery of MoO₄^2- was 95-99% at pH 9-11. Exptl. data related to the effects of surface tension, electrokinetic potential, pH and Mo concentration on the flotation effectiveness are given.

Revistade Chimie (Bucharest, Romania) published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C13H15NO6S, Recommanded Product: Dodecylamineacetate.

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