Category: Pyrazines

Dong, Yuanyuan published the artcileComparative analysis of thermal processing on aroma-active compounds of egg curd, Formula: C7H10N2, the main research area is thermal aroma active compound egg curd.

Egg curd is a favorite snack in China. For a better understanding of aroma formation, the changes of volatile compounds during thermal process were analyzed by headspace solid-phase microextraction and gas chromatog.-olfactometry-mass spectrometry. After thermal coagulation, the total concentration of odorants increased by 17 times, in which aldehyde compounds were the most preponderant. Based on aroma extract dilution anal., eight predominant aroma compounds were identified, most of which were the products of the lipid oxidation and enhanced with the increase of coagulation temperature After sterilization, total concentration of odorants increased by 7.96-folds. 13 new odorants generated, seven of them were heterocyclic compounds, which accounted for 78.6% of total volatiles. About 12 aroma-active compounds were identified as predominant compounds, which were most likely to be generated in Maillard reaction. Hence, most of the key odorants of sterilized egg curd increased with the elevated temperature Practical applications : This research revealed different aroma characters in different thermal processing methods, which would help to better understand and control the critical quality-determining parameters for egg curd processing.

Journal of Food Processing and Preservation published new progress about Alcohols Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 14667-55-1 belongs to class pyrazines, name is 2,3,5-Trimethylpyrazine, and the molecular formula is C7H10N2, Formula: C7H10N2.

Referemce:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Yang, Yini published the artcileFlavor characteristics of peanut butter pretreated by radio frequency heating, explosion puffing, microwave, and oven heating, Name: 2,3,5-Trimethylpyrazine, the main research area is peanut butter flavor radio frequency microwave oven heating; Aroma identification; Electronic sensing; Electronic tongue; Heating pretreatment; Peanut butter; Sensory evaluation.

Currently, the effect of different pretreatments (i.e., radio frequency (RF), explosion puffing (EP), microwave (MW) and oven heating (OH)) on the flavor characteristics of peanut butter is unclear. Consequently, this study identified volatile aroma and non-volatile taste using HS-SPME/GC-MS combined with the use of an electronic nose, electronic tongue, and sniffing. 53 volatile compounds in four peanut butters were identified, MW-treated samples exhibited the most aroma-active compounds (43), followed by samples treated using OH (42), EP (38) and RF (21). Different pretreatment resulted in significant flavor differences in the aroma and taste. The peanut butter under MW pretreatment had a strongest nutty notes among the treatments. RF methods yielded smaller particle sizes and better texture compared to conventional OH. However, instantaneous heating using EP did not result in improvements to the aroma or taste. A combination of MW and RF may improve the flavor quality of peanut butter.

Food Chemistry published new progress about Alcohols Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 14667-55-1 belongs to class pyrazines, name is 2,3,5-Trimethylpyrazine, and the molecular formula is C7H10N2, Name: 2,3,5-Trimethylpyrazine.

Referemce:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Qian, Dun published the artcileEffects of hot and cold-pressed processes on volatile compounds of peanut oil and corresponding analysis of characteristic flavor components, Name: 2,3,5-Trimethylpyrazine, the main research area is peanut oil volatile compound flavor hot cold pressing.

The volatile compounds are concentrated from hot-pressed and cold-pressed peanut oils by HS-SPME and were analyzed by GC-MS-O. In the present study, 101 volatiles were identified in the hot-pressed peanut oil samples, mainly including pyrazines, aldehydes, furans, alcs. and pyrroles, of which characteristic flavor compounds present fresh, fatty, nutty and baking flavor. Sixty-four volatiles were obtained from the cold-pressed peanut oil samples, mainly consisting of aldehydes, alcs., hydrocarbons, furans and ketones, of which characteristic flavor compounds show fresh and nutty flavor. The results indicated that hot-pressed peanut oil has an advantage over cold-pressed peanut oil in the retention of flavor components. Hence, the process method has a significant effect on the flavor components of peanut oil, and the present study may be helpful in evaluating peanut oil quality, as well as discrimination of hot-pressed and cold-pressed peanut oil.

LWT–Food Science and Technology published new progress about Alcohols Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 14667-55-1 belongs to class pyrazines, name is 2,3,5-Trimethylpyrazine, and the molecular formula is C7H10N2, Name: 2,3,5-Trimethylpyrazine.

Referemce:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Li, Xinran published the artcileMechanism of aroma compounds changes from sea cucumber peptide powders (SCPPs) under different storage conditions, Related Products of pyrazines, the main research area is sea cucumber peptide powder food storage; Aroma compounds; Headspace-gas chromatography-ion mobility spectrometry (HS-GC-IMS); Peptide; Sea cucumber; Storage.

A rapid and sensitive measurement technique was used to investigate the mechanism of aroma compounds changes in SCPPs under the storage conditions with hygroscopicity and no-microorganism (HNM), nonhygroscopicity and no-microorganism (NHNM) and hygroscopicity and microorganism (HM) by HS-GC-IMS. The types and signal of aroma compounds increased obviously at the 5th day under the storage condition (HNM and HM). The signal of majority of aroma compounds decreased gradually since the 5th day. However, during the storage of SCPPs for 15 days, the total signals of aldehydes, ketones and alcs. gradually increased and reached a maximum Thereinto, the saturated aldehydes such as hexanal had been produced as an off-flavor. These off-flavor compounds principally including aldehydes and ketones could be generated through Maillard reaction, while alcs. could be generated by microbial fermentation The study discovered moisture adsorption and microorganism during storage could affect aroma compounds of SCPPs and the effect of moisture absorption was greater than microorganisms.

Food Research International published new progress about Alcohols Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 14667-55-1 belongs to class pyrazines, name is 2,3,5-Trimethylpyrazine, and the molecular formula is C7H10N2, Related Products of pyrazines.

Referemce:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Li, Juan published the artcileComparative analysis of aroma compounds in Chinese traditional dry-rendered fat by HS/GC-IMS, SPME/GC-MS, and SPME/GC-O, Recommanded Product: 2,3,5-Trimethylpyrazine, the main research area is aroma traditional dry rendered fat China.

Aroma compositions of Chinese traditional dry-rendered s.c. chicken, pork, beef, and sheep fats were analyzed by HS/GC-IMS, SPME/GC-MS, and SPME/GC-O. HS/GC-IMS and SPME/GC-MS identified 53 and 86 volatile compounds, resp. SPME/GC-O anal. identified 35 odor-active compounds The identifications included fatty aldehydes, ketones, alcs., acids, and esters from lipid degradation and compounds from the Maillard reaction (e.g., trimethylpyrazine) or other sources (e.g., p-cresol from animal feeds). PCA anal. showed all three approaches could discriminate aroma compositions of the four fats. PCA loading plot suggested the aroma compounds related to each of the four fats and PLS-DA model anal. screened the marker compounds differentiating aroma of the four fats. Notably, SPME/GC-O approach behaved the best in differing aromas of the four fats by PCA. The HS/GC-IMS anal. was biased for the chicken fat and pork fat, and the SPME/GC-MS anal. was biased towards the beef fat and sheep fat in differing the aroma compositions by PCA. PLS-DA model anal. showed that for the SPME/GC-O anal., the marker compounds (VIP scores >1) discriminating aromas of the four fats were hexanal, (E,E)-2,4-decadienal, 2-butanone, 4,5-epoxy-2(E)-decenal, γ-octalactone, γ-undecalactone, heptanal, octanal, 4-ethyloctanoic acid, etc.

Journal of Food Composition and Analysis published new progress about Alcohols Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 14667-55-1 belongs to class pyrazines, name is 2,3,5-Trimethylpyrazine, and the molecular formula is C7H10N2, Recommanded Product: 2,3,5-Trimethylpyrazine.

Referemce:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Wen, Rongxin published the artcileEvaluation the potential of lactic acid bacteria isolates from traditional beef jerky as starter cultures and their effects on flavor formation during fermentation, Safety of 2,3,5-Trimethylpyrazine, the main research area is lactic acid bacteria beef jerky flavor fermentation.

The effects of the inoculation with autochthonous lactic acid bacteria (LAB) strains (Lactobacillus sakei BL6, Pediococcus acidilactici BP2, and Lactobacillus fermentum BL11) on the pH, lipid oxidation, protein oxidation, volatile compounds, and sensory evaluation of beef jerky were investigated. The pH, thiobarbituric acid reactive substances, and carbonyl contents of the inoculated jerky were significantly lower than those of the control (P < 0.05). A total of 61 volatile compounds were identified and quantified. L. sakei BL6 inoculation led to higher carbohydrate fermentation-derived volatile compound contents, whereas P. acidilactici BP2 inoculation led to higher contents of volatile compounds derived from lipid β-oxidation, amino acid metabolism, and esterase activity. According to the sensory anal., the jerky inoculated with P. acidilactici BP2 had the highest acceptability score. In conclusion, inoculation with P. acidilactici BP2 enhanced the flavor profile and acceptability of beef jerky. LWT--Food Science and Technology published new progress about Alcohols Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 14667-55-1 belongs to class pyrazines, name is 2,3,5-Trimethylpyrazine, and the molecular formula is C7H10N2, Safety of 2,3,5-Trimethylpyrazine.

Referemce:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Guevara-Avendano, Edgar published the artcileAvocado rhizobacteria emit volatile organic compounds with antifungal activity against Fusarium solani, Fusarium sp. associated with Kuroshio shot hole borer, and Colletotrichum gloeosporioides, COA of Formula: C7H10N2, the main research area is sequence Fusarium Colletotrichum volatile organic compound antifungal; Bacillus spp.; Bacterial volatiles; Biological control; Persea americana; Pseudomonas sp.; Rhizosphere.

Recent studies showed that bacterial volatile organic compounds (VOCs) play an important role in the suppression of phytopathogens. The ability of VOCs produced by avocado (Persea americana Mill.) rhizobacteria to suppress the growth of common avocado pathogens was therefore investigated. We evaluated the antifungal activity of VOCs emitted by avocado rhizobacteria in a first screening against Fusarium solani, and in subsequent antagonism assays against Fusarium sp. associated with Kuroshio shot hole borer, Colletotrichum gloeosporioides and Phytophthora cinnamomi, responsible for Fusarium dieback, anthracnosis and Phytophthora root rot in avocado, resp. We also analyzed the composition of the bacterial volatile profiles by solid phase microextraction (SPME) gas chromatog. coupled to mass spectrometry (GC-MS). Seven isolates, belonging to the bacterial genera Bacillus and Pseudomonas, reduced the mycelial growth of F. solani with inhibition percentages higher than 20%. Isolate HA, related to Bacillus amyloliquefaciens, significantly reduced the mycelial growth of Fusarium sp. and C. gloeosporioides and the mycelium d. of P. cinnamomi. Isolates SO and SJJ, also members of the genus Bacillus, reduced Fusarium sp. mycelial growth and induced morphol. alterations of fungal hyphae while isolate HB, close to B. mycoides, inhibited C. gloeosporioides. The anal. of the volatile profiles revealed the presence of ketones, pyrazines and sulfur-containing compounds, previously reported with antifungal activity. Altogether, our results support the potential of avocado rhizobacteria to act as biocontrol agents of avocado fungal pathogens and emphasize the importance of Bacillus spp. for the control of emerging avocado diseases such as Fusarium dieback.

Microbiological Research published new progress about Alcohols Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 14667-55-1 belongs to class pyrazines, name is 2,3,5-Trimethylpyrazine, and the molecular formula is C7H10N2, COA of Formula: C7H10N2.

Referemce:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Assi-Clair, Brice J. published the artcileEffect of aroma potential of Saccharomyces cerevisiae fermentation on the volatile profile of raw cocoa and sensory attributes of chocolate produced thereof, HPLC of Formula: 14667-55-1, the main research area is chocolate odor flavor ester aldehyde pyrazine Saccharomyces fermentation.

This research describes on-farm-inoculated cocoa bean fermentation with two selected strains of high aroma-producing Saccharomyces cerevisiae isolated from wine fermentation and their effects on volatile profile of resulted raw cocoa material and sensory characteristics of chocolates produced. Both strains produced suitably flavor-active esters, aldehydes, ketones and pyrazines in raw cocoa. Inoculation of S. cerevisiae at 0.5 g kg-1 significantly improved the volatile profile of raw cocoa beans and enabled production of chocolate with enhanced intense fresh fruits and floral notes. Chocolate produced thereof presented better overall quality attributed whatever the fermentation time in comparison to the chocolate issued from spontaneous fermentation Our results suggested the ways of using selected enhanced yeasts as S. cerevisiae for on-farm implementation of bean fermentation as promising alternative possibilities to improve the cocoa fermentation process, desirable flavorful raw cocoa material and high-aroma-quality chocolates produced.

European Food Research and Technology published new progress about Aldehydes Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 14667-55-1 belongs to class pyrazines, name is 2,3,5-Trimethylpyrazine, and the molecular formula is C7H10N2, HPLC of Formula: 14667-55-1.

Referemce:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Hinneh, Michael published the artcileComparing flavor profiles of dark chocolates refined with melanger and conched with Stephan mixer in various alternative chocolate production techniques, Related Products of pyrazines, the main research area is dark chocolate flavor food processing.

The use of alternative equipment for chocolate production is gaining attention in recent times in many countries. This is due to the lower cost of investment and maintenance, multi-functionality, and lower throughput. This study was conducted to investigate the applicability of two of such equipment; melanger and Stephan mixer. In the first set-up, the possibility of refining chocolate with the melanger in comparison with the conventional 3-roll refiner was explored. Whereas in the second set-up, the applicability of the Stephan mixer (aided with a vacuum pump) for a conching-like application was also investigated. From each set-up, 70% dark chocolates produced through various alternative means were then evaluated on the basis of their flavor profiles. Specific groups of volatiles such as aldehydes, ketones, terpenes and terpenoids, showed significant (p < 0.05) differences due to the different refining techniques applied. However, this effect was not reflected in terms of the overall volatile concentrations of these chocolates. For chocolates which were conched with Stephan mixer, the decreasing effect of vacuum duration and its interaction with dry conching temperature on the total volatile concentration also proved significant (p < 0.05). Finally, an agglomerative hierarchical clustering of all chocolates on the basis of their aroma volatiles revealed three distinct clusters. Nonetheless, a 112-member consumer preference testing showed statistically similar (p > 0.05) preference for these representative chocolates from the clusters. These findings stimulate various practical application possibilities for tuning chocolate flavor through alternative processing for both industries and various artisans worldwide.

European Food Research and Technology published new progress about Aldehydes Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 14667-55-1 belongs to class pyrazines, name is 2,3,5-Trimethylpyrazine, and the molecular formula is C7H10N2, Related Products of pyrazines.

Referemce:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Li, Qian published the artcileCharacterization of the flavor compounds in wheat bran and biochemical conversion for application in food, Computed Properties of 14667-55-1, the main research area is wheat bun enzymic hydrolysis flavor steam; Millard reaction; enzymatic hydrolysis; flavor profiles; steamed wheat bun; wheat bran.

Wheat bran, an abundant and low-cost byproduct from agricultural processing, can be used as an alternative food resource. Biochem. conversion of wheat bran to food ingredient involves pretreatments of bran to enhance its acceptability. In this work, the effects of the Maillard reaction and enzymolysis on flavor properties of wheat bran and sensory evaluation of steamed buns fortified with wheat bran were analyzed using GC-MS combined with sensory evaluation. The results showed that the Maillard reaction and enzymic hydrolysis, as well as flavoring process, could effectively improve the flavor profiles of wheat bran. The flavor compounds in modified wheat bran products as well as its fuzzy sensory score increased significantly (P < 0.05) compared with those in com. available dry malt extract Addnl., steamed buns fortified with wheat bran had enhanced flavor and overall acceptability. The study can be useful in valorization a plethora of grain bran (waste) into valuable resources. Journal of Food Science published new progress about Aldehydes Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 14667-55-1 belongs to class pyrazines, name is 2,3,5-Trimethylpyrazine, and the molecular formula is C7H10N2, Computed Properties of 14667-55-1.

Referemce:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem