Month: November 2022

Gasinski, Alan published the artcileMalting procedure and its impact on the composition of volatiles and antioxidative potential of naked and covered oat varieties, Recommanded Product: 5-Methyl-2-phenylhex-2-enal, the main research area is naked covered oat volatile compound antioxidant malting.

Grains from four naked oat varieties (Amant, Maczo, Polar and Siwek) and one covered oat variety (Kozak) grown with three different nitrogen fertilization regimes were malted in a laboratory setting using specifications typical for barley malt production (45% moisture content, temperature of germination equal to 15 °C, germination time equal to 120 h). The goal was to determine, whether malting process could be used to improve pro-health properties and aroma of the covered oat and naked oat grain. Malting increased concentration of phenolic compounds (from 44.92 to 64.39 mg GAE per 100 g of grain to 158.06-393.69 mg GAE per 100 g of malt) and increased the antioxidative potential of grains (analyzed by ABTS, DPPH and FRAP assays) by 200-300%. Malting also had an effect on the changes in composition of volatile compounds: the HS-SPME-GC-MS detected 23 compounds in grain samples and 34 compounds were detected in malt samples. The total concentration of volatiles in malts was significantly higher (1659.70-39708.33 ng per 100 g) than in grain samples (882.45-2098.74 ng per 100 g). Malting mostly increased concentration of aldehydes, such as nonanal, decanal and undecanal and pyrazines, such as trimethyl- and tetramethylpyrazine in the acquired malts.

Journal of Cereal Science published new progress about Alcohols Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 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

Xue, Jinjin published the artcileIdentification of aroma-active compounds responsible for the floral and sweet odors of Congou black teas using gas chromatography-mass spectrometry/olfactometry, odor activity value, and chemometrics, Computed Properties of 21834-92-4, the main research area is black tea aroma compound odor GC MS olfactometry chemometrics; aroma-active compounds; congou black tea; floral odor; gas chromatography-mass spectrometry/olfactometry; sweet odor; terpenoid.

Floral and sweet odors are two typical characteristic aromas of Congou black tea, but their aroma-active compounds are still unclear. Characterizing the key aroma-active compounds can provide a theor. foundation for the practical aroma quality evaluation of Congou black tea and directional processing technol. of high-quality black tea with floral or sweet odors. Gas chromatog.-olfactometry (GC-O) combined with odor activity value (OAV) is often used to screen key aroma-active substances, but the interaction between aroma components and their impact on the overall sensory quality is ignored. Therefore, in this study, OAV combined with variable importance in projection (VIP) and Spearman correlation anal. (SCA) were used to characterize the aroma-active components of Congou black teas with floral and sweet odors. Eighty-five volatiles were identified in these samples using gas chromatog.-mass spectrometry (GC-MS). Twenty-three compounds were identified as potential markers for the floral and sweet odors of Congou black teas from orthogonal partial least squares discriminant anal. (OPLS-DA). Eighteen compounds were selected as candidate aroma compounds based on GC-O anal. and OAV calculations In addition, 26 compounds were screened as crucial aroma compounds based on SCA. Finally, 19 compounds were evaluated as key aroma compounds by the comprehensive evaluation of VIP, OAV, and SCA. Terpenoids are the main active compounds that contribute to the floral odor of Congou black tea, whereas aldehydes are the key compounds for the sweet odor. The proposed method can effectively screen the aroma-active compounds and can be used for comprehensive quality control of products. 2022 Society of Chem. Industry.

Journal of the Science of Food and Agriculture published new progress about Alcohols Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Computed Properties of 21834-92-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Wei, Quanzeng published the artcileSearch for potential molecular indices for the fermentation progress of soy sauce through dynamic changes of volatile compounds, Synthetic Route of 21834-92-4, the main research area is soy sauce fermentation volatile compound.

To date, the fermentation progress and maturity of soy sauce are mainly judged by olfactory and individual experiences, which are subjective and lack quality control. In this study, dynamic changes of volatile compounds during soy sauce fermentation were profiled to search for mol. indexes of fermentation progression. In total, 119 volatile compounds were identified and quantified by headspace solid-phase microextraction gas chromatog.-mass spectrometry. Principal component anal. (PCA) revealed the compounds that contributed most to the distinction of various stages of fermentation progression; the list included 2-methoxy-4-vinylphenol, phenylethyl alc., phenylacetaldehyde, and benzaldehyde. The degradation of 2-methoxy-4-vinylphenol and the generation of phenylethyl alc. could remarkably discriminate between the discrete stages of soy sauce fermentation It therefore suggests that their group was a refined and potential index to indicate the progression of the soy sauce fermentation This work furthers our understanding of the mol. changes occurring during soy sauce fermentation and improves its quality control and process management.

Food Research International published new progress about Alcohols Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Synthetic Route of 21834-92-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zhen, Zong-Yuan published the artcileDetermination of volatile flavor compounds in raw and treated duck meats of different body parts, SDS of cas: 1455-77-2, the main research area is volatile flavor compound body part duck meat; duck meat; gas chromatography-mass spectrometry (GC-MS); headspace solid-phase micro-extraction (SPME); volatile flavor substance.

The compounds in volatile flavor substances in duck meats of three different body parts (breast, leg, and wing) were extracted by headspace solid-phase micro-extraction and determined by gas chromatog.-mass spectrometry. A total of 16 main volatile compounds including 4 hydrocarbons, 4 alcs., 2 acids, 3 aldehydes, and 3 others (N-containing, S-containing) were identified in raw duck meats from three different body parts. The hydrocarbon compounds account for more than 50% of all volatile substances in all three body parts. And the percentage of hydrocarbon compounds in raw duck breast meat reaches 82.76%. A total of 81 volatile compounds including 15 hydrocarbons, 10 alcs., 7 acids, 12 aldehydes, 4 esters, 19 S-containing and N-containing compounds, and 14 others were isolated and identified in 1 h-marinated and cooked duck meats. A total of 101 kinds of volatile flavor compounds including 13 hydrocarbons, 14 alc., 7 acids, 8 aldehydes, 12 esters, 23 S-containing and N-containing compounds, and 24 others were detected in 3 h-marinated duck meats of the three body parts. It was proved in this study that under the same conditions, the volatile compounds in duck legs are more than those in duck breasts and wings, and the types of volatile flavor substances increase significantly in duck meats after cooked. Practical applications Prepared and cooked duck meat, especially wings and legs are popular food in China. The results suggest that Pickling makes duck meat more flavory while proper pickling time is less than 3 h. Duck wings are better for marinating and cooking compared with duck breasts and legs. The acceptance study of duck meat from different body parts and the anal. of volatile flavor compounds are beneficial for optimizing utilization of whole parts of duck meat.

Journal of Food Biochemistry published new progress about Alcohols Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, SDS of cas: 1455-77-2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zhen, Zong-Yuan published the artcileDetermination of volatile flavor compounds in raw and treated duck meats of different body parts, Computed Properties of 1455-77-2, the main research area is volatile flavor compound body part duck meat; duck meat; gas chromatography-mass spectrometry (GC-MS); headspace solid-phase micro-extraction (SPME); volatile flavor substance.

The compounds in volatile flavor substances in duck meats of three different body parts (breast, leg, and wing) were extracted by headspace solid-phase micro-extraction and determined by gas chromatog.-mass spectrometry. A total of 16 main volatile compounds including 4 hydrocarbons, 4 alcs., 2 acids, 3 aldehydes, and 3 others (N-containing, S-containing) were identified in raw duck meats from three different body parts. The hydrocarbon compounds account for more than 50% of all volatile substances in all three body parts. And the percentage of hydrocarbon compounds in raw duck breast meat reaches 82.76%. A total of 81 volatile compounds including 15 hydrocarbons, 10 alcs., 7 acids, 12 aldehydes, 4 esters, 19 S-containing and N-containing compounds, and 14 others were isolated and identified in 1 h-marinated and cooked duck meats. A total of 101 kinds of volatile flavor compounds including 13 hydrocarbons, 14 alc., 7 acids, 8 aldehydes, 12 esters, 23 S-containing and N-containing compounds, and 24 others were detected in 3 h-marinated duck meats of the three body parts. It was proved in this study that under the same conditions, the volatile compounds in duck legs are more than those in duck breasts and wings, and the types of volatile flavor substances increase significantly in duck meats after cooked. Practical applications Prepared and cooked duck meat, especially wings and legs are popular food in China. The results suggest that Pickling makes duck meat more flavory while proper pickling time is less than 3 h. Duck wings are better for marinating and cooking compared with duck breasts and legs. The acceptance study of duck meat from different body parts and the anal. of volatile flavor compounds are beneficial for optimizing utilization of whole parts of duck meat.

Journal of Food Biochemistry published new progress about Alcohols Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Computed Properties of 1455-77-2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Yang, Yang published the artcileStructure-activity relationship study of DEL-22379: ERK dimerization inhibitors with increased safety, Synthetic Route of 104-01-8, the main research area is lung liver cancer DEL22379 anticancer agent ERK signaling; Anti-cancer activity; ERK dimerization inhibitor; Indolin-2-one; Structure–activity relationship; Synthesis.

Abstract: Aberrant activation of ERK signaling pathway usually leads to oncogenesis, and small mol. agents targeting this pathway are impeded by the emergence of drug resistance due to reactivation of ERK signaling. Compound DEL-22379 has been reported to inhibit ERK dimerization which was unaffected by drug-resistant mechanism reactivating the ERK signaling. Here, we discussed a structure-activity relationship study of DEL-22379. Forty-seven analogs were designed and synthesized. Each synthesized compound was biol. evaluated for their inhibitory rates on several tumor cell lines and compounds with high inhibitory rates were further evaluated for IC50 values. The structure-activity relationship of idolin-2-one scaffold and the impact of Z/E configuration on potency were discussed. Potential safety of two synthesized analogs was investigated and in silico docking study of five compounds was performed to understand the structural basis of ERK dimerization inhibition. Graphic abstract: [graphic not available: see fulltext].

Molecular Diversity published new progress about Albumins Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Synthetic Route of 104-01-8.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Wang, Weigang published the artcileOrganic compounds evolution and sludge properties variation along partial nitritation and subsequent anammox processes treating reject water, Safety of 2,3-Dimethoxybenzaldehyde, the main research area is organic compound sludge nitritation anammox wastewater treatment; Denitrification; Nitrogen removal; Organic compounds evolution; Partial nitritation-anammox; Reject water.

Reject water contains complex components of organic compounds, which have significant influences on the nitrogen removal performance when treated using biol. autotrophic nitrogen removal technol. In this study, a two-stage partial nitritation (PN)-anammox (floc-granule) system was established to treat reject water (COD/NH+4-N = 0.97 ± 0.15), and the evolution of organic compounds along PN and annamox bioreactors was investigated using gas chromatog.-mass spectrometry and excitation-emission matrix. Also, the variation of PN and anammox sludge properties relating to COD reduction was examined The PN-anammox system removed approx. 80% of total inorganic nitrogen and COD with hydraulic reaction time of 16 h. The influent organics (330-600 mg COD/L) in reject water were primarily composed of volatile, protein-like and humic acid-like organic compounds PN process contributed 53 ± 18% of the overall COD removal, primarily including oxygen-containing organics (e.g. phenol), proteins and humic acids. Anammox process contributed 22 ± 15% of the overall COD removal, but large mol. acids (e.g. lactic acid) and small mol. alcs. (e.g. glycerol) were reoccurred, contributing to the effluent COD with recalcitrant hydrocarbons (e.g. n-Octadecane). Reject water increased the extracellular proteins/polysaccharides ratio of PN and anammox sludge, promoting the adsorption and degradation of organic compounds High-throughput sequencing results showed that denitrifying bacteria of Ottowia increased from 0.03% to 14.4% in PN reactor, and of Denitratisoma increased from 9.6% to 15.4% in anammox reactor. The occurrence of these denitrifiers might mitigate the neg. impact of organics to functional organisms. This study highlights the organics fate during PN-anammox treatment system, which is important to maintain the robust nitrogen removal when treating organics-containing and high ammonium concentration wastewater.

Water Research published new progress about 16S rRNA Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Safety of 2,3-Dimethoxybenzaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

van Bergen, Tamara J. H. M. published the artcileDo initial concentration and activated sludge seasonality affect pharmaceutical biotransformation rate constants?, SDS of cas: 117-96-4, the main research area is activated sludge pharmaceutical biotransformation rate constant seasonality affect; Bacterial community; Kinetics; Nitrification; Organic micropollutants; Sorption; Wastewater treatment plants.

Pharmaceuticals find their way to the aquatic environment via wastewater treatment plants (WWTPs). Biotransformation plays an important role in mitigating environmental risks; however, a mechanistic understanding of involved processes is limited. The aim of this study was to evaluate potential relationships between first-order biotransformation rate constants (kb) of nine pharmaceuticals and initial concentration of the selected compounds, and sampling season of the used activated sludge inocula. Four-day bottle experiments were performed with activated sludge from WWTP Groesbeek (The Netherlands) of two different seasons, summer and winter, spiked with two environmentally relevant concentrations (3 and 30 nM) of pharmaceuticals. Concentrations of the compounds were measured by LC-MS/MS, microbial community composition was assessed by 16S rRNA gene amplicon sequencing, and kb values were calculated The biodegradable pharmaceuticals were acetaminophen, metformin, metoprolol, terbutaline, and phenazone (ranked from high to low biotransformation rates). Carbamazepine, diatrizoic acid, diclofenac, and fluoxetine were not converted. Summer and winter inocula did not show significant differences in microbial community composition, but resulted in a slightly different kb for some pharmaceuticals. Likely microbial activity was responsible instead of community composition In the same inoculum, different kb values were measured, depending on initial concentration In general, biodegradable compounds had a higher kb when the initial concentration was higher. This demonstrates that Michealis-Menten kinetic theory has shortcomings for some pharmaceuticals at low, environmentally relevant concentrations and that the pharmaceutical concentration should be taken into account when measuring the kb in order to reliably predict the fate of pharmaceuticals in the WWTP. Key points: • Biotransformation and sorption of pharmaceuticals were assessed in activated sludge. • Higher initial concentrations resulted in higher biotransformation rate constants for biodegradable pharmaceuticals. • Summer and winter inocula produced slightly different biotransformation rate constants although microbial community composition did not significantly change.

Applied Microbiology and Biotechnology published new progress about 16S rRNA Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, SDS of cas: 117-96-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Sadamitsu, Yuta published the artcileKolbe-Schmitt type reaction under ambient conditions mediated by an organic base, Computed Properties of 151-10-0, the main research area is salicylic acid preparation; resorcinol carbon dioxide DBU Kolbe Schmitt type reaction.

The combined use of an organic base for resorcinols realized a Kolbe-Schmitt type reaction under ambient conditions. When resorcinols (3-hydroxyphenol derivatives) were treated with DBU under a carbon dioxide atm., nucleophilic addition to carbon dioxide proceeded to afford the corresponding salicylic acid derivatives in high yields.

Chemical Communications (Cambridge, United Kingdom) published new progress about Hydroxycarboxylic acids Role: SPN (Synthetic Preparation), PREP (Preparation). 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, Computed Properties of 151-10-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Murugesan, Kathiravan published the artcileReusable Nickel Nanoparticles-Catalyzed Reductive Amination for Selective Synthesis of Primary Amines, Safety of 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, the main research area is primary amine preparation nickel nanoparticle catalyst; carbonyl compound ammonia mol hydrogen reductive amination; ammonia; carbonyl compounds; nickel nanoparticles; primary amines; reductive amination.

The preparation of nickel nanoparticles as efficient reductive amination catalysts by pyrolysis of in situ generated Ni-tartaric acid complex on silica is presented. The resulting stable and reusable Ni-nanocatalyst enables the synthesis of functionalized and structurally diverse primary benzylic, heterocyclic and aliphatic amines starting from inexpensive and readily available carbonyl compounds and ammonia in presence of mol. hydrogen. Applying this Ni-based amination protocol, -NH2 moiety can be introduced in structurally complex compounds, for example, steroid derivatives and pharmaceuticals.

Angewandte Chemie, International Edition published new progress about Carbonyl compounds (organic) Role: RCT (Reactant), RACT (Reactant or Reagent). 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Safety of 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem