Category: isoquinoline

Rottiers, Hayley published the artcileA multipronged flavor comparison of Ecuadorian CCN51 and Nacional cocoa cultivars, Recommanded Product: 5-Methyl-2-phenylhex-2-enal, the main research area is Theobroma nacional cocoa flavor sensory property odor.

Two cocoa types are predominantly being cultivated in Ecuador, the highly appreciated fine Nacional and the high-yielding and disease-resistant CCN51, classified as bulk. With the introduction of foreign germplasm in Ecuador and the international demand for high-quality Nacional cocoa, the present study aims to characterize and compare the flavor profile of Nacional hybrids (EET103, EET559, EET576 and EET577) and CCN51, and to assess the effect of the genotype. The fermented dried beans were processed into liquor and their sensory properties, volatile composition and odor fingerprint were analyzed by trained panelists, headspace-solid phase microextraction gas chromatog.-mass spectrometry (HS-SPME-GC-MS), and GC electronic nose (e-nose), resp., combined with multivariate statistics. Seventy volatiles were identified and semi-quantified, among them, 16 and 14 volatiles conferring fruity and floral aroma notes, resp. CCN51 was mainly characterized by undesirable odor-active volatiles, whereas the EET cultivars contained the highest concentration of most fruity and floral volatiles, with differences in between EET cultivars. Sensory data highlighted organoleptic differences between the fine and bulk liquors, i.e. the fruity and acid EET flavor strongly differed from the bitter, astringent and off-flavor attributes of CCN51. Principal component anal. (PCA) discriminated firstly between fine and bulk, and secondly between EET identity. Partial least squares anal. identified possible correlations between sensory attributes and volatile compounds Besides, e-nose proved its usefulness for rapid assessment of the liquors’ sensory profile. The results provide a foundation for understanding the genotype’s contribution to and the compositional basis of Ecuadorian fine and bulk cocoa flavor.

European Food Research and Technology published new progress about Acidity. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Recommanded Product: 5-Methyl-2-phenylhex-2-enal.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Karabagias, Ioannis K. published the artcileCharacterization and classification of Thymus capitatus (L.) honey according to geographical origin based on volatile compounds, physicochemical parameters and chemometrics, Formula: C13H16O, the main research area is Thymus honey volatile compound.

Greek thyme honeys (Thymus capitatus L.) were characterized and classified according to geog. origin based on the determination of volatile compounds and physicochem. parameters using MANOVA and Linear Discriminant Anal. Forty two thyme honey samples were collected during the harvesting period in 2011 from 5 different regions in Greece known to produce thyme honey of good quality. The anal. of volatile compounds was performed by Headspace Solid Phase Microextraction coupled to Gas chromatog./Mass spectroscopy. Forty seven volatile compounds were identified and semi-quantified. Physicochem. anal. included the determination of pH, free, lactonic and total acidity, elec. conductivity, moisture, ash, lactonic/free acidity ratio and color parameters: L*, a*, b*. Using 9 volatile compounds and 11 physicochem. parameters the honey samples were satisfactorily classified according to geog. origin using volatile compounds (64.3% correct prediction), physicochem. parameters (92.7% correct prediction), and the combination of both (92.9% correct prediction).

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

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Pasini, Federica published the artcileBuckwheat honeys: Screening of composition and properties, Recommanded Product: 5-Methyl-2-phenylhex-2-enal, the main research area is buckwheat honey flavor physicochem property; Buckwheat honey; GC–MS; HPLC–DAD–MS; Phenolic compounds; Physicochemical parameters; Solid-phase microextraction (SPME); Volatile compounds.

The quality of 10 buckwheat honeys, collected from Italian and east European beekeepers declaring to produce monofloral honey, were evaluated by means of their pollen, physicochem., phenolic and volatile composition data. The results of the traditional analyses and in particular elec. conductivity, optical rotation, pH and sugar composition revealed some poorly pure samples that could not fit in the buckwheat tipol. Honey volatiles, analyzed by solid phase microextraction (SPME) and gas chromatog.-mass-spectrometry (GC/MS), showed more than 100 volatile compounds, most of them present in all honey samples but with quant. variation. Besides many furfural derivates, 3-methylbutanoic acid was the main volatile compound found in most of honeys. Also the presence of 2- and 3-methylbutanal and phenylacetaldehyde confirmed the typical buckwheat aroma of some studied samples, corroborating physicochem. data. The HPLC phenolic profile was similar across the samples and p-hydroxybenzoic and p-coumaric acids proved to be the main components.

Food Chemistry published new progress about Acidity. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Recommanded Product: 5-Methyl-2-phenylhex-2-enal.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Rudmann, Daniel published the artcileUsing Deep Learning Artificial Intelligence Algorithms to Verify N-Nitroso-N-Methylurea and Urethane Positive Control Proliferative Changes in Tg-RasH2 Mouse Carcinogenicity Studies, Application of 1-Methylurea, the main research area is nitrosomethylurea urethane TgRasH carcinogenicity deep learning artificial intelligence algorithm; Tg-rasH2; artificial intelligence; carcinogenicity; convolutional neural network; deep learning; safety assessment.

In Tg-rasH2 carcinogenicity mouse models, a pos. control group is treated with a carcinogen such as urethane or N-nitroso-N-methylurea to test study validity based on the presence of the expected proliferative lesions in the transgenic mice. We hypothesized that artificial intelligence-based deep learning (DL) could provide decision support for the toxicol. pathologist by screening for the proliferative changes, verifying the expected pattern for the pos. control groups. Whole slide images (WSIs) of the lungs, thymus, and stomach from pos. control groups were used for supervised training of a convolutional neural network (CNN). A single pathologist annotated WSIs of normal and abnormal tissue regions for training the CNN-based supervised classifier using INHAND criteria. The algorithm was evaluated using a subset of tissue regions that were not used for training and then addnl. tissues were evaluated blindly by 2 independent pathologists. A binary output (proliferative classes present or not) from the pathologists was compared to that of the CNN classifier. The CNN model grouped proliferative lesion pos. and neg. animals at high concordance with the pathologists. This process simulated a workflow for review of these studies, whereby a DL algorithm could provide decision support for the pathologists in a nonclin. study.

Toxicologic Pathology published new progress about Adenoma. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Application of 1-Methylurea.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Asturiol, D. published the artcileConsensus of classification trees for skin sensitization hazard prediction, Category: isoquinoline, the main research area is consensus classification tree skin sensitization hazard; Decision tree; In silico; In vitro; Prediction; QSAR; Skin sensitisation.

Since March 2013, it is no longer possible to market in the European Union (EU) cosmetics containing new ingredients tested on animals. Although several in silico alternatives are available and achievements have been made in the development and regulatory adoption of skin sensitization non-animal tests, there is not yet a generally accepted approach for skin sensitization assessment that would fully substitute the need for animal testing. The aim of this work was to build a defined approach (i.e. a predictive model based on readouts from various information sources that uses a fixed procedure for generating a prediction) for skin sensitization hazard prediction (sensitizer/non-sensitizer) using Local Lymph Node Assay (LLNA) results as reference classifications. To derive the model, we built a dataset with high quality data from in chemico (DPRA) and in vitro (KeratinoSens and h-CLAT) methods, and it was complemented with predictions from several software packages. The modeling exercise showed that skin sensitization hazard was better predicted by classification trees based on in silico predictions. The defined approach consists of a consensus of two classification trees that are based on descriptors that account for protein reactivity and structural features. The model showed an accuracy of 0.93, sensitivity of 0.98, and specificity of 0.85 for 269 chems. In addition, the defined approach provides a measure of confidence associated to the prediction.

Toxicology In Vitro published new progress about Allergy. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Category: isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Natsch, Andreas published the artcileDeriving a no expected sensitization induction level for fragrance ingredients without animal testing: an integrated approach applied to specific case studies, Recommanded Product: 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, the main research area is fragrance ingredient sensitization complimentary alternative testing risk assessment.

Cosmetic regulations prohibit animal testing for the purpose of safety assessment and recent registration, evaluation and authorization of chems. guidance states that the local lymph node assay (LLNA) in mice shall only be conducted if in vitro data cannot give sufficient information for classification and labeling. However, Quant. Risk Assessment for fragrance ingredients requires an NESIL (no expected sensitization induction level), a dose not expected to cause induction of skin sensitization in humans. In absence of human data, this is derived from the LLNA and it remains a key challenge for risk assessors to derive this value from nonanimal data. Here we present a workflow using structural information, reactivity data and KeratinoSens results to predict an LLNA result as a point of departure. Specific addnl. tests (metabolic activation, complementary reactivity tests) are applied in selected cases depending on the chem. domain of a mol. Finally, in vitro and in vivo data on close analogs are used to estimate uncertainty of the prediction in the specific chem. domain. This approach was applied to three mols. which were subsequently tested in the LLNA and 22 mols. with available and sometimes discordant human and LLNA data. Four addnl. case studies illustrate how this approach is being applied to recently developed mols. in the absence of animal data. Estimation of uncertainty and how this can be applied to determine a final NESIL for risk assessment is discussed. We conclude that, in the data-rich domain of fragrance ingredients, sensitization risk assessment without animal testing is possible in most cases by this integrated approach.

Toxicological Sciences published new progress about Allergy. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Recommanded Product: 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Miyazaki, Hiroshi published the artcileDevelopment of a chromophore-solid phase peptide reaction assay (C-SPRA) for assessing skin sensitization in vitro, Application of 5-Methyl-2-phenylhex-2-enal, the main research area is chromophore solid phase peptide skin sensitization.

The authors developed an in vitro chromophore-solid phase peptide reaction assay (C-SPRA) using microbead-immobilized peptides and chromophores. Peptide-resins (microbeads) reacted with 14 representative chems. to demonstrate the test′s capacity to predict skin sensitization. C-SPRA enables accurate and high-throughput assessments of various chems., including poorly water-soluble sensitizers that are regarded as weakly potent by other methods.

Analyst (Cambridge, United Kingdom) published new progress about Allergy. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Application of 5-Methyl-2-phenylhex-2-enal.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Li, Wen published the artcileAnalysis of volatile compounds of Lentinula edodes grown in different culture substrate formulations, HPLC of Formula: 21834-92-4, the main research area is Lentinula volatile compound culture substrate formulation; (E)-2-nonenal (PubChem CID: 5283335); 1-Octen-3-ol (PubChem CID: 18827); 1-Octen-3-one (PubChem CID: 61346); 1-Propanethiol (PubChem CID: 7848); 2-Methylbutanal (PubChem CID: 7284); 3-Methylbutanal (PubChem CID: 11552); Dimethyl disulfide (PubChem CID: 12232); Enzyme activity; Gene expression; Hexanal (PubChem CID: 6184); Lentinula edodes; Odor activity value; Volatile compound.

Volatile compounds of Lentinula edodes grown in different culture substrate (CS) formulations were analyzed to reveal (i) the relationship between volatile compound production and CS formulations, (ii) the contribution of volatile compounds to L. edodes flavor, (iii) the activities of LOX and γ-GGT enzymes, (iv) γ-GGT gene expression, and (v) the correlation between enzyme activity and volatile compound production Our results showed that 82 kinds of volatile compounds were analyzed; 25 volatile compounds were considered key flavor components, and sulfur containing compounds, eight-carbon compounds, and aldehyde compounds also had great contributions to mushroom flavor. Bagasse could be used as a partial substitute for sawdust as a carbon source. LOX and γ-GGT activities showed a weak correlation with the volatile end products. The results indicated that the mechanisms by which CS formulations influence volatile compounds production were complex.

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

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Meinel, F. published the artcilePilot-scale study of powdered activated carbon recirculation for micropollutant removal, Safety of Diatrizoic Acid, the main research area is diclofenac removal efficiency powd activated carbon wastewater treatment.

Adsorption onto powd. activated carbon (PAC) is a promising technique for the removal of organic micropollutants (OMPs) from treated wastewater. To enhance the adsorption efficiency, PAC is recycled back into the adsorption stage. This technique was examined in pilot scale in comparison to a reference without recirculation. Coagulation with Fe3+ was carried out simultaneously to adsorption. Extensive OMP measurements showed that recirculation significantly increased OMP eliminations. Thus, significant PAC savings were feasible. The PAC concentration in the contact reactor proved to be an important operating parameter that can be surrogated by the easily measurable total suspended solids (TSS) concentration OMP eliminations increased with increasing TSS concentrations At 20 mg PAC L-1 and 2.8 g TSS L-1 in the contact reactor, well-adsorbable carbamazepine was eliminated by 97%, moderately adsorbable diclofenac was eliminated by 92% and poorly-adsorbable acesulfame was eliminated by 54% in comparison to 49%, 35% and 18%, resp., without recirculation. The recirculation system represents an efficient technique, as the PAC’s adsorption capacity is practically completely used. Small PAC dosages yield high OMP eliminations. Poorly-adsorbable gabapentin was eliminated to an unexpectedly high degree. A laboratory-scale biomass inhibition study showed that aerobic biodegradation removed gabapentin in addition to adsorption.

Water Science and Technology published new progress about Biomass. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Safety of Diatrizoic Acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Niu, Haoxin published the artcilePhosphorus-Free Vanillin-Derived Intrinsically Flame-Retardant Epoxy Thermoset with Extremely Low Heat Release Rate and Smoke Emission, Formula: C2H5N5, the main research area is vanillin intrinsically flame retardant epoxy thermoset.

Recently, the development of bio-based intrinsically flame-retardant epoxy thermosets has attracted increasing interest for the replacement of petroleum-based epoxy thermosets in fields that demand high anti-flammability. In this work, we synthesized a Schiff base triazole-containing epoxy monomer (Triazole-VA-EP) using vanillin (from a renewable source) and 3,5-diamino-1,2,4-triazole. The mol. structure of Triazole-VA-EP was confirmed by the proton and carbon NMR. The Triazole-VA-EP monomer was cured by 4,4′-diaminodiphenylmethane (DDM) to obtain a bio-based epoxy thermoset, with a petroleum-based diglycidyl ether of bisphenol A (DGEBA) cured by DDM as a contrastive sample. The cured Triazole-VA-EP/DDM product displayed higher tensile strength and glass transition temperature than the cured DGEBA/DDM system. The cured Triazole-VA-EP/DDM product showed an outstanding intrinsic flame resistance, with a relatively high limited oxygen index (LOI) value of 39.5% and UL-94 V-0 rating, whereas the cured DGEBA/DDM system displayed a low LOI value of 23.5% and no rating in the UL-94 vertical burning measurement. Furthermore, the cured Triazole-VA-EP/DDM system exhibited 82.3, 52.8, and 71.7% decline in peak heat release rate (199.6 vs. 1125.2 kW/m2), total heat release (47.04 vs. 99.73 MJ/m2), and total smoke production (5.70 vs. 20.12 m2), resp., compared to the cured DGEBA/DDM system. The super anti-flammability of the cured Triazole-VA-EP/DDM system was attributed to its excellent charring ability, which not only cut off the fuel supply by reducing the amount of thermal decomposition volatiles but also served as a barrier to retard the heat release and smoke emission. This work provides a new strategy to synthesize a bio-based fire-safe epoxy monomer by Schiff base reaction without using phosphorus-containing compounds

ACS Sustainable Chemistry & Engineering published new progress about Biomass. 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