Day: December 2, 2022

Barbosa-Pereira, Letricia published the artcileAssessment of volatile fingerprint by HS-SPME/GC-qMS and E-nose for the classification of cocoa bean shells using chemometrics, SDS of cas: 21834-92-4, the main research area is Theobroma shell volatile fingerprint headspace SPME GC mass spectrometry; Chemical markers; Cocoa bean shell; Cocoa by-product; Cocoa flavour; E-nose; HS-SMPE/GC-qMS; Principal component analysis; Volatile fingerprint.

The cocoa bean shell (CBS) is a main byproduct of cocoa processing, with great potential to be used as an ingredient for functional foods because of its nutritional and flavor properties. This study aimed to characterize and classify CBSs obtained from cocoa beans of diverse cultivars and collected in different geog. origins through their volatile profile assessed using headspace solid-phase microextraction gas chromatog.-mass spectrometry (HS-SPME/GC-qMS) and E-nose combined with principal component anal. (PCA). The study provides, for the first time in a representative set of samples, a comprehensive fingerprint and semi-quant. data for >100 volatile organic compounds (VOCs), such as aldehydes, ketones, pyrazines, alcs., and acids. Through PCA, a clear separation of the Criollo cultivar from the other cultivars was achieved with both GC-qMS and E-nose anal. techniques because of the high content of key-aroma VOCs. Several biomarkers identified by GC-qMS, such as 2-hepanol, 2-methylpropanoic acid, and 2,3,5-trimethylpyrazine, recognized as key-aroma compounds for cocoa beans, were found suitable for the classification of CBSs according to their quality and origin. GC-qMS and E-nose appeared to be suitable anal. approaches to classify CBSs, with a high correlation between both anal. techniques. The volatile fingerprint and classification of CBSs could allow for the selection of samples with a specific flavor profile according to the food application and, therefore, constitute an interesting approach to valorise this byproduct as a food ingredient.

Food Research International published new progress about Biomarkers. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, SDS of cas: 21834-92-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Devaraj, Harish published the artcileProfiling of headspace volatiles from Escherichia coli cultures using silicone-based sorptive media and thermal desorption GC-MS, COA of Formula: C13H16O, the main research area is headspace volatile Escherichia culture silicone sorptive media GCMS; bacterial volatiles; gas chromatography; sorptive extraction; stir bar; thermal desorption.

Headspace sorptive extraction technique using silicone based sorptive media coated stir bars is used for the first time here to extract, identify, and quantify heavy volatile organic compounds present in Escherichia coli culture headspace. Detection of infection presence is largely accomplished in laboratories through phys. sampling and subsequent growth of cultures for biochem. testing. The use of volatile biomarkers released from pathogens as indicators for pathogenic presence can vastly reduce the time needed while improving the success rates for infection detection. To validate this, by using a contactless headspace sorptive extraction technique, the volatile compounds released from E. coli, grown in vitro, have been extracted and identified. Two different sorptive media for extracting these headspace volatiles were compared in this study and the identified volatiles were quantified. The large phase volume and wider retention of this sorptive technique compared to traditional sampling approach enabled preconcentration and collection of wider range of volatiles towards developing an extensive database of such heavy volatiles associated with E. coli. This supplements the existing data of potential bacterial markers and use of internal standards in these tests allows semi-quant. estimation of these compounds towards the development and optimization of novel pathogen sensing devices.

Journal of Separation Science published new progress about Biomarkers. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, COA of Formula: C13H16O.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Wasilewski, Tomasz published the artcileDetermination of long-chain aldehydes using a novel quartz crystal microbalance sensor based on a biomimetic peptide, HPLC of Formula: 1205-17-0, the main research area is aliphatic aldehyde quartz crystal microbalance biosensor biomimetic peptide.

This study presents investigation on usefulness of the peptide mimicking HarmOBP7 region as a receptor element of the piezoelec. sensor for selective anal. of long-chain aldehydes. Identification of odorant binding proteins creates new possibilities for design of peptides mimicking binding properties of their volatile compounds Exploration of OBPs and new peptide sequences capable to effectively bind volatile compounds is necessary to enhance artificial olfaction. For the development of biosensors where simple detection is crucial rather than identification of subsequent metabolic activity, the use of sub-protein components (e.g. ligand-binding regions or synthetic peptides) is still escalating. Bearing all this in mind, a segment of a peptide sequence associated with a specific function of HarmOBP7 (involved in binding the long-chain aldehydes) has been designed, synthesized and immobilized on a piezoelec. transducer. The results of in silico investigations were correlated with the exptl. measurements of gas substances. The correlated results confirm a high selectivity of the KLLFDSLTDLKKKMSEC-based sensor with respect to long-chain aliphatic aldehydes including octanal, decanal, undecanal, nonanal and helional. Odorant mols. interact with recognition peptide with specific affinities. The results can throw a new light on the possibility of synthetic peptide application as a receptor layer in biosensors in odorants anal.

Microchemical Journal published new progress about Biomarkers. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, HPLC of Formula: 1205-17-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Gao, Tong published the artcileMechanochemical synthesis of three-component metal-organic frameworks for large scale production, Application of 3,5-Diamino-1,2,4-triazole, the main research area is zinc amino triazolate isophthalate MOF mechanochem preparation gas adsorption; XPS zinc amino triazolate isophthalate MOF.

Two pillared-layer metal-organic frameworks with pcu network were synthesized by the mechanochem. reaction of three components (ZnO, 3-amino-1,2,4-triazole (Hatz) or 3,5-diamino-1,2,4-triazole (Hdatz), and isophthalic acid (H2ipa)) at room temperature with space-time yield up to 4800 kgm-3 day-1. The mechanochem.-synthesized [Zn2(atz)2(ipa)] (Zn-atz-ipa) and [Zn2(datz)2(ipa)] (Zn-datz-ipa) exhibit the high purity and porosity with BET surface areas of 655 and 572 m2g-1, resp., which are comparable with those synthesized by the traditional solvothermal method. In C2H4/C2H6 (volume/volume = 1/1) breakthrough experiment, Zn-datz-ipa can preferentially adsorb C2H6 over C2H4, showing a great potential for one-step purification of C2H4. In addition, this mechanochem. method can be scaled up to 100 mmol magnitude with single-pass production up to 20.0 g.

Journal of Solid State Chemistry published new progress about Ball mills. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Application of 3,5-Diamino-1,2,4-triazole.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Gao, Tong published the artcileMechanochemical synthesis of three-component metal-organic frameworks for large scale production, Category: isoquinoline, the main research area is zinc amino triazolate isophthalate MOF mechanochem preparation gas adsorption; XPS zinc amino triazolate isophthalate MOF.

Two pillared-layer metal-organic frameworks with pcu network were synthesized by the mechanochem. reaction of three components (ZnO, 3-amino-1,2,4-triazole (Hatz) or 3,5-diamino-1,2,4-triazole (Hdatz), and isophthalic acid (H2ipa)) at room temperature with space-time yield up to 4800 kgm-3 day-1. The mechanochem.-synthesized [Zn2(atz)2(ipa)] (Zn-atz-ipa) and [Zn2(datz)2(ipa)] (Zn-datz-ipa) exhibit the high purity and porosity with BET surface areas of 655 and 572 m2g-1, resp., which are comparable with those synthesized by the traditional solvothermal method. In C2H4/C2H6 (volume/volume = 1/1) breakthrough experiment, Zn-datz-ipa can preferentially adsorb C2H6 over C2H4, showing a great potential for one-step purification of C2H4. In addition, this mechanochem. method can be scaled up to 100 mmol magnitude with single-pass production up to 20.0 g.

Journal of Solid State Chemistry published new progress about Ball mills. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Category: isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Jiang, Haihua published the artcileVapor-Liquid Phase Equilibrium for Separation of Isopropanol from Its Aqueous Solution by Choline Chloride-Based Deep Eutectic Solvent Selected by COSMO-SAC Model, Quality Control of 598-50-5, the main research area is vapor liquid phase equilibrium separation isopropanol aqueous solution; choline chloride deep eutectic solvent COSMO SAC model.

To sep. isopropanol from its aqueous solution by distillation, the deep eutectic solvents (DESs) with choline chloride, which were screened using the COSMO-SAC mode, were applied to eliminate the azeotropic point. The charge d. distribution over the mol. surface was calculated for isopropanol, water, and DESs to analyze the interactions between different species. Based on the screening results, a DES consisting of choline chloride and triethylene glycol in a molar ratio of 1:3 was selected. To validate the selected DES for the separation of isopropanol from its aqueous solution, the isobaric vapor-liquid equilibrium (VLE) data for the system of isopropanol + water + DES were measured at a pressure of 101.3 kPa. According to the measured VLE data, the azeotropic point of isopropanol and water can be eliminated by the DES at a concentration of 10 wt %. Meanwhile, the thermodn. consistency of the VLE data was checked by the van Ness test. The non-random two-liquid model was employed to correlate the VLE data, which were in agreement with the measured VLE data.

Journal of Chemical & Engineering Data published new progress about Azeotropes. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Quality Control of 598-50-5.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zhao, Xiaodan published the artcileEnhanced abatement of organic contaminants by zero-valent copper and sulfite, Formula: C11H9I3N2O4, the main research area is copper sulfite iohexol organic contaminant oxidation waste water treatment.

Sulfate radicals (SO4·-) are highly efficient for the degradation organic pollutants. SO4·- can be produced by activation of sulfites, yet actual heterogeneous activators exhibit a lower reactivity for activation of sulfite to SO4·- at pH 7.0-8.0. Here we hypothesized that zero-valent copper can activate sulfite under mild conditions. We tested the reaction with iohexol, diatrizoate, atrazine, benzoic acid, and p-chlorobenzoic acid contaminants. Reactive radicals were identified by ESR, fluorescence spectrometry, and radical scavenging experiments Results show up to 90% abatement of contaminants by combining sulfite with zero-valent copper at pH 8.0. Moreover, zero-valent copper maintains a crystalline stability and satisfactory reusability with iohexol abatement efficiency up to 80% after five runs.

Environmental Chemistry Letters published new progress about Atmosphere. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Formula: C11H9I3N2O4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Chen, Dongxu published the artcileIntroduction of the acylamino group to bridged bis(nitroamino-1,2,4-triazole): a strategy for tuning the sensitivity of energetic materials, Formula: C2H5N5, the main research area is energetic material nitroaminotriazole acylamino introduction sensitivity tuning.

In this work, the acylamino group has been introduced into energetic materials to build acylamino-bridged bis(1,2,4-triazole) 3 and its nitration derivative 4. Both 3 and 4 were thoroughly characterized via spectroscopic and structural methods. In addition, their sensitivities toward friction and impact were determined and the energetic performances of 3 and 4 were calculated using the EXPLO5 code. Compound 3 is insensitive to mech. stimulation (IS: 40 J, FS: 320 N). Besides, compared with the C-C-bonded compound DNABT (IS: 3 J, D: 8355 m s-1) without any bridging group, 4 achieves a balance between the sensitivity (IS: 18 J, FS: 200 N) and the detonation velocity (D: 8564 m s-1). The effect of introducing an acylamino group into 3 and 4 was elucidated using HOM: O-LUMO anal. and the anisotropy of the induced current-d. method.

New Journal of Chemistry published new progress about Anisotropy. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Formula: C2H5N5.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Bhat, Mashooq A. published the artcileNovel sulindac derivatives: synthesis, characterisation, evaluation of antioxidant, analgesic, anti-inflammatory, ulcerogenic and COX-2 inhibition activity, Product Details of C9H10O3, the main research area is sulindac acetohydrazide synthesis NSAID analgesic antioxidant COX2 ulcer; COX-2 activity; Sulindac hydrazide; analgesic; anti-inflammatory; antioxidant; hydrazones.

A new series of N’-(substituted phenyl)-2-(1-(4-(methylsulfinyl) benzylidene)-5-fluoro-2-methyl-1H-inden-3-yl) acetohydrazide derivatives were prepared in good yields in an efficient manner. All the compounds were fully characterised by the elemental anal. and spectral data. Synthesized compounds were evaluated for antioxidant activity by DPPH method. Compounds (R = 3-methoxyphenyl), (R = 4-dimethylaminophenyl) and (R = 2,4,5-trimethoxy phenyl) substitutions were found to be having highly potent antioxidant activity. Compound , with para dimethylaminophenyl substitution was found to be having highest antioxidant activity. It was further evaluated in vivo for various analgesic, anti-inflammatory, ulcerogenic and COX-2 inhibitory activity in different animal models. Lead compound was found to be significant anti-inflammatory and analgesic agent. It was also evaluated for ulcerogenic activity and demonstrated significant ulcerogenic reduction activity in ethanol and indomethacin model. The LD50 of compound was found to be 131 mg/kg. The animals treated with compound prior to cisplatin treatment resulted in a significant reduction in COX-2 protein expression when compared to cisplatin-treated group. Sulindac derivative with para dimethylaminophenyl substitution was found to be the most potent antioxidant, anti-inflammatory and analgesic agent as well as with significant gastric sparing activity as compared to standard drug sulindac. Compound significantly downregulated liver tissue COX-2 gene expression.

Journal of Enzyme Inhibition and Medicinal Chemistry published new progress about Analgesics. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Product Details of C9H10O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Alsaif, Nawaf A. published the artcileSynthesis of novel diclofenac hydrazones: molecular docking, anti-inflammatory, analgesic and ulcerogenic activity, Formula: C9H10O3, the main research area is dichloroanilinophenyl methylidene acetohydrazide preparation antiinflammatory analgesic ulcerogenic SAR docking.

This study was aimed to design novel diclofenac hydrazones I [R = 2,4-dimethoxyphenyl, 3,5-dimethoxy-4-hydroxyphenyl, 2,5-dihydroxyphenyl, Etc] having anti-inflammatory and analgesic activity with gastric sparing effect. A new series of 2-[2-(2,6-dichloroanilino)phenyl]-N’-[(substituted phenyl)methylidene] acetohydrazide derivatives I were synthesized and evaluated for their anti-inflammatory, analgesic, and ulcerogenic activity. The compounds I were identified and confirmed by elemental anal. and spectral data. During anti-inflammatory activity by carrageenan-induced paw edema method, compounds I [R = 2,3-dimethoxyphenyl, 2,4-dimethoxyphenyl, 3-ethoxy-2-hydroxyphenyl, 3,5-dimethoxy-4-hydroxyphenyl, 3-methoxy-4-ethoxyphenyl, 2,5-dihydroxyphenyl] were found to be most promising. Compounds I [R = 2,4-dimethoxyphenyl, 3,5-dimethoxy-4-hydroxyphenyl, 2,5-dihydroxyphenyl] have been found to have significant analgesic activity compared to the reference drug diclofenac in analgesic activity by both the hot plate method and acetic acid-induced writhing method. The compounds I which presented highly significant anti-inflammatory and analgesic activity were further tested for their ulcerogenic activity. Compounds I [R = 2,4-dimethoxyphenyl, 3,5-dimethoxy-4-hydroxyphenyl] showed maximum ulcerogenic reduction activities. Compound I [R = 3,5-dimethoxy-4-hydroxyphenyl] was found to have LD50 of 168 mg/kg. Compound I [R = 3,5-dimethoxy-4-hydroxyphenyl] with 3,5-dimethoxy-4-hydroxyphenyl substitution was found to be the most promising anti-inflammatory and analgesic agent with gastric sparing activity. Mol. docking of compounds I was performed for COX-1/COX-2 binding site. Lead compound I [R = 3,5-dimethoxy-4-hydroxyphenyl] showed better binding affinities of -9.4 kJ/mol with both COX-1 and COX-2 as compared to the standard drug, diclofenac with binding affinities of -6.6 kJ/mol and -8.1 kJ/mol for COX-1 and COX-2, resp.

Journal of Chemistry published new progress about Analgesics. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Formula: C9H10O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem