Catalysis-chemistry

Sinha, Sujata published the artcileEffect of organic counter-ions on the surface activity, micellar formation and dye solubilization behaviour of cationic surfactants, Category: catalysis-chemistry, the publication is Indian Journal of Chemistry, Section A: Inorganic, Bio-inorganic, Physical, Theoretical & Analytical Chemistry (2002), 41A(5), 914-920, database is CAplus.

The effect of eight organic counterions (aliphatic, both mono and dicarboxylates) on the surface and micellar behavior of decyl and dodecyl ammonium carboxylates in aqueous solution has been examined by different physicochem. techniques such as surface tension, dye solubilization, conductance viscosity and NMR. The effect of these counter-ions as observed from surface activity, and critical micelle concentration (CMC) is explained in terms of their condensation /penetration onto/into the micelles. The decrease in CMC and increase in counter-ion binding of cationic surfactants is attributed to the increased hydrophobicity in alkyl chain of counter-ions. In the case of monocarboxylate counter-ions, CMC decreases significantly in the order: n-butyrate < propionate < acetate <formate, while for dicarboxylates decrease in CMC with increase in number of carbon atoms in the counter-ion is less substantial. Compared to monocarboxylates, dicarboxylate counter-ions condense strongly onto the micelle surface and thus are capable of being easily incorporated into the micelles and consequently show greater surface activity, and lower CMC of cationic surfactant. The effect of temperature on surface activity and micellar behavior of decyl ammonium succinate is also reported.

Indian Journal of Chemistry, Section A: Inorganic, Bio-inorganic, Physical, Theoretical & Analytical Chemistry 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 C7H13BrSi, Category: catalysis-chemistry.

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

Mohammadi Ziarani, Ghodsi published the artcileSpiroindeno-pyridineindoles (SIPIs) as new visible colorimetric pH indicators, Quality Control of 13822-56-5, the publication is Chemosphere (2022), 135630, database is CAplus and MEDLINE.

Some new, highly selective, and sensitive colorimetric pH indicators, spiro[4H-indeno-[1,2-b]pyridine-4,3′-[3H]indoles] I (R¹ = H, Bn; R² = Me, Ph; R³ = Et; X = Br, I, F, etc.) (SIPIs) in aqueous solution were developed. SIPIs I were synthesized via a one-pot four-component condensation of isatin derivatives, II β-diketones R₂C(O)CH₂C(O)OEt, 1,3-indandione, and ammonium acetate using FSi-PrNH-BuSO₃H as a nanocatalyst in EtOH. According to the exptl. evaluations, it was found that SIPI derivatives are pH indicators for naked-eye detection of OH ion with intense color changes from orange to purple in the pH range of 10.3-12.

Chemosphere 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, Quality Control of 13822-56-5.

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

Musa, Musiliyu A. published the artcileIdentification of 7,8-dihydroxy-3-phenylcoumarin as a reversible monoamine oxidase enzyme inhibitor, HPLC of Formula: 104-03-0, the publication is Journal of Biochemical and Molecular Toxicology (2021), 35(2), e22651, database is CAplus and MEDLINE.

We herein report the biol. evaluation of 3-arylcoumarin derivatives (3a-l) as potential human monoamine oxidase-A and -B (hMAO-A and hMAO-B) inhibitors. The result indicated that 7,8-dihydroxy-3-(4-nitrophenyl)coumarin (3j) was most effective against MAO-A (inhibition concentration [IC₅₀] = 6.46 ± 0.02μM) and MAO-B (IC₅₀ = 3.8 ± 0.3μM) enzymes than other synthesized compounds and reference compounds (pargyline and moclobemide). Furthermore, compound (3j) showed (a) nonselectivity against hMAO enzymes, (b) reversible hMAO enzymes inhibition, and (c) neuroprotection against H₂O2-treated human neuroblastoma (N2a) cells. Finally, a mol. modeling study revealed that the hMAO enzymes inhibitory activity of the compound (3j) may be due to the orientation where the nitro (NO2) group lies deep into the receptor and the Ph ring directed toward flavin adenosine dinucleotide via hydrogen bond interaction, and possible π-π interaction with various important residues. Thus, the results of the present study demonstrate that compound (3j) can be considered as a promising scaffold for the development of hMAO-A and hMAO-B inhibitors.

Journal of Biochemical and Molecular Toxicology 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, HPLC of Formula: 104-03-0.

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

Courage-Maguire, Carol published the artcileCorrelation of in vitro anti-proliferative potential with in vivo teratogenicity in a series of valproate analogs, Product Details of C10H20O2, the publication is International Journal of Developmental Neuroscience (1997), 15(1), 37-43, database is CAplus and MEDLINE.

The prediction that an anti-proliferative effect coupled with a pro-differentiative action will detect a neural tube teratogen has been validated by comparison of these in vitro endpoints with in vivo teratogenicity in a series of closely allied valproate structural analogs. The majority of the compounds significantly inhibited C6 glioma proliferation, the most potent compounds being ranked as octanoic acid > 2-propylhexanoic acid â‰?2-ethylhexanoic acid â‰?valproic acid. The anti-proliferative potency of these compounds did not correlate strictly to their relative in vivo teratogenic potential. Valproic acid exhibited an anti-proliferative IC₅₀ of 1.45 mM, whereas 2-propyl-2-pentenoic acid and 2-propyl-4-pentenoic acid were virtually indistinguishable, exhibiting significantly lower IC₅₀ values of 2.5 and 2.55 mM, resp. The Con A lectin affinity assay was employed to establish whether an anti-proliferative action was coupled with an increased state of cell differentiation. In this lectin affinity assay, the most potent analogs to significantly attenuate the affinity of exposed C6 glioma cells for Con A lectin-coated plastic included 2-butylhexanoic acid, 2-propyl-4-pentenoic acid, 2-propylhexanoic acid, and 2-ethylhexanoic acid in a manner which can be related to their relative teratogenic potencies in vivo. All compounds screened pos. in both the anti-proliferative and pro-differentiative assays exhibited in vivo exencephalic rates of 5-44%. These included valproic acid, 2-ethylhexanoic acid, 2-propylhexanoic acid, and 2-butylhexanoic acid. It would appear that combined anti-proliferative and pro-differentiative screens provide a promising detection system for teratogenic status in a series of valproate analogs.

International Journal of Developmental Neuroscience published new progress about 3115-28-4. 3115-28-4 belongs to catalysis-chemistry, auxiliary class Aliphatic Chain, name is 2-Butylhexanoic acid, and the molecular formula is C10H20O2, Product Details of C10H20O2.

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

Tanaka, Tetsuaki published the artcileA new sulfenylation reagent, 3-phenylsulfenyl-2-(N-cyanoimino)thiazolidine, and its optically active version, COA of Formula: C10H15NS, the publication is Synlett (2000), 33-36, database is CAplus.

A new sulfenylation reagent, 3-(phenylthio)-2-(N-cyanoimino)thiazolidine (I), was developed, which is readily available and stable upon storage. Compound I easily reacts with amines or thiols to give the corresponding sulfenamides or asym. disulfides in excellent yields. The α-sulfenylation of carbonyl compounds with I proceeds smoothly. Furthermore, the optically active 4-diphenylmethyl derivative of I was synthesized as an asym. sulfenylation reagent, which realized 96% ee upon α-sulfenylation of a cyclic β-keto ester.

Synlett published new progress about 19117-31-8. 19117-31-8 belongs to catalysis-chemistry, auxiliary class Oxidant, name is N-(tert-Butyl)-S-phenylthiohydroxylamine, and the molecular formula is C6H12O2, COA of Formula: C10H15NS.

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

Saadat, Mostafa published the artcileSulfonic acid-functionalized magnetic carbon nitride as highly efficient ionic composite for sustainable assembly of 1,2,3-triazoles, Product Details of C10H11NO4, the publication is Journal of the Iranian Chemical Society (2021), 18(8), 2057-2064, database is CAplus.

An efficient and straightforward method for constructing of biol. active 4-aryl-NH-1,2,3-triazoles I [Ar = Ph, 2-BrC₆H₄, 2-thienyl, etc.] by the 1,3-dipolar cycloaddition reaction of β-nitrostyrene and sodium azide in the presence of acidic graphitic carbon nitride (Fe₃O₄@g-C₃N₄-SO₃H) ionic nanocomposite had developed. Using a magnetically recoverable acidic ionic catalyst allows eco-friendly and facile conversion and simplifies exptl. setup and work-up procedure that enables the direct synthesis of triazole derivatives under mild conditions. The designed catalytic system provided a broader scope under short reaction times in good to excellent yields. Fe₃O₄@g-C₃N₄-SO₃H could be simply recovered by magnetic separation using an external magnet, maintaining stable activity up to five cycles without appreciable loss of activity.

Journal of the Iranian 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 C10H11NO4, Product Details of C10H11NO4.

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

Zhang, Nan published the artcileSynthesis and SAR of 6-chloro-4-fluoroalkylamino-2-heteroaryl-5-(substituted)phenylpyrimidines as anti-cancer agents, Recommanded Product: 1,1,1-Trifluoropropan-2-amine, the publication is Bioorganic & Medicinal Chemistry (2009), 17(1), 111-118, database is CAplus and MEDLINE.

The synthesis and SAR of a series of 6-chloro-4-fluoroalkylamino-2-heteroaryl-5-(substituted)phenylpyrimidines as anti-cancer agents are described. This series of 2-heteroarylpyrimidines was developed by modifying a series of anti-tumor [1,2,4]triazolo[1,5-a]pyrimidines and 2-cyanoaminopyrimidines we reported earlier. For the 2-heteroaryl group, the best activity is obtained when the heteroaryl group has a nitrogen atom at the ortho-position to the pyrimidyl core. The structure-activity relationship for the rest of the mol. in this 2-heteroarylpyrimidine series mimics that of the [1,2,4]triazolo[1,5-a]pyrimidine series. Like triazolopyrimidines and 2-cyanoaminopyrimidines, the 2-heteroarylpyrimidines retain the capability to overcome multidrug resistance due to Pgp. Mechanism of action studies showed that the lead compounds behaved in the same manner as triazolopyrimidines and 2-cyanoaminopyrimidines. The lead compounds in this series are more potent than the corresponding triazolopyrimidines in vitro and in vivo. Compound 21 (PTI-868) showed tumor growth inhibition in several nude mouse xenograft models, and was selected to advance to preclin. development.

Bioorganic & Medicinal Chemistry published new progress about 421-49-8. 421-49-8 belongs to catalysis-chemistry, auxiliary class Trifluoromethyl,Fluoride,Amine,Aliphatic hydrocarbon chain, name is 1,1,1-Trifluoropropan-2-amine, and the molecular formula is C6H12N2O, Recommanded Product: 1,1,1-Trifluoropropan-2-amine.

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

Polster, Jake W. published the artcileRectified and Salt Concentration Dependent Wetting of Hydrophobic Nanopores, SDS of cas: 13822-56-5, the publication is Journal of the American Chemical Society (2022), 144(26), 11693-11705, database is CAplus and MEDLINE.

Nanopores lined with hydrophobic groups function as switches for water and all dissolved species, such that transport is allowed only when applying a sufficiently high transmembrane pressure difference or voltage. Here we show a hydrophobic nanopore system whose wetting and ability to transport water and ions is rectified and can be controlled with salt concentration The nanopore we study contains a junction between a hydrophobic zone and a pos. charged hydrophilic zone. The nanopore is closed for transport at low salt concentrations and exhibits finite current only when the concentration reaches a threshold value that is dependent on the pore opening diameter, voltage polarity and magnitude, and type of electrolyte. The smallest nanopore studied here had a 4 nm diameter and did not open for transport in any concentration of KCl or KI examined A 12 nm nanopore was closed for all KCl solutions but conducted current in KI at concentrations above 100 mM for neg. voltages and opened for both voltage polarities at 500 mM KI. Nanopores with a hydrophobic/hydrophilic junction can thus function as diodes, such that one can identify a range of salt concentrations where the pores transport water and ions for only one voltage polarity. Mol. dynamics simulations together with continuum models provided a multiscale explanation of the observed phenomena and linked the salt concentration dependence of wetting with an electrowetting model. Results presented are crucial for designing next-generation chem. and ionic separation devices, as well as understanding fundamental properties of hydrophobic interfaces under nanoconfinement. Pore opening probability for nanopores in a wide range of KCl and KI concentrations (a-d) TEM images of as prepared pores are shown on the left. The middle and right-hand side panels show data for KCl and KI, resp.

Journal of the American Chemical Society 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, SDS of cas: 13822-56-5.

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

Nwachukwu, Blessing Chidinma published the artcileEffects of soil properties and carbon substrates on bacterial diversity of two sunflower farms, Recommanded Product: (S)-2-Amino-4-(methylthio)butanoic acid, the publication is AMB Express (2022), 12(1), 47, database is CAplus and MEDLINE.

The sustainable production of sunflower (Helianthus annuus) is crucial and one way to accomplish this feat is to have an understanding of the beneficial bacteria of sunflower rhizosphere. Similarly, the respiratory response of these bacteria needs to be studied to understand their roles in the ecosystem. This study was therefore conceptualized to gain insights into the effects of soil properties and carbon substrate utilization on bacterial community diversity of sunflower rhizosphere grown in Ditsobottla and Kraaipan, North West Province, South Africa. Extracted DNA from sunflower rhizosphere and bulk soils was subjected to 16S amplicon sequencing. Significant differences were observed in the alpha and beta diversities of the soil bacterial communities (p < 0.05). At the order level, among all the bacterial taxa captured in the farms, Bacillales were the most dominant. The abundance of Lactobacillales, Bacillales, Rhizobiales, Enterobacteriales, Burkholderiales, Flavobacteriales, Sphingomonadales, Myxococcales, and Nitrosomonadales obtained from Ditsobottla rhizosphere soil (R1) was pos. influenced by organic matter (OM), while the abundance of Planctomycetales, Cytophagales, Gemmatimonadales, Nitrospirales and Caulobacteriales from Kraaipan rhizosphere soil (R2) was pos. influenced by total N and pH. Bacterial communities of all the soil samples utilized the different carbon substrates (three amino acids, six carbohydrates, and three carboxylic acids) as an energy source. Significant differences (p < 0.05) were only observed in tryptophan and methionine amended soils. Unclassified bacteria were also captured in this study, such bacteria can further be harnessed for sustainable production of sunflower and other agricultural crops.

AMB Express 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, Recommanded Product: (S)-2-Amino-4-(methylthio)butanoic acid.

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

Fathy, E. S. published the artcileFabrication and characterization of gamma-irradiated nanomarble/acrylonitrile and styrene butadiene rubber nanocomposites, Recommanded Product: 3-(Trimethoxysilyl)propan-1-amine, the publication is Polymer Engineering & Science (2022), 62(5), 1538-1548, database is CAplus.

A comparative study on two nanocomposites based namely on acrylonitrile-butadiene (NBR) and styrene-butadiene (SBR) synthetic rubbers, reinforced by varying ratios of waste nanomarble particles (WM) was carried out. Silane which served as coupling agent was applied in treating waste marble (TWM) and the characters of the prepared nanocomposites before and after treatments were examined Nanocomposites were fabricated using a laboratory roll mill and pressed under heat, then irradiated with γ-rays at 100 kGy. Filler characterization, using the techniques transmission electron microscopy (TEM), FTIR spectroscopy, and X-ray diffraction (XRD) were discussed. TEM micrographs revealed that though untreated WM particles were within the nanometer scale, however showed incremental reduction in size via silane treatment. Mech. parameters, thermal stability, FTIR and SEM (SEM) of the advanced NBR and SBR nanocomposites have been studied. Filler loading with 5 wt% led to remarked improvement in the tensile strength (TS), modulus of elasticity (M₁₀₀), and tearing strength of the NBR nanocomposite samples. Meanwhile, elongation at break of SBR nanocomposites exhibited regressive behavior. Thermal stability testing of pristine NBR and SBR specimens demonstrated adverse features by compounding with untreated and treated waste nanomarble. Furthermore, gamma irradiated NBR nanocomposites reinforced with TWM indicated appreciable development at all thermogravimetric stages. Whereas, irradiation of SBR nanocomposites with a gamma integral dose of 100 kGy resulted in slight enhancement in thermal stability.

Polymer Engineering & Science 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, Recommanded Product: 3-(Trimethoxysilyl)propan-1-amine.

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