Tag: M.W=150-200

Murakami, Hiroki published the artcileNovel Aza-Michael Addition-Asymmetric Protonation to α,β-Unsaturated Carboxylic Acids with Chiral Thiourea-Boronic Acid Hybrid Catalysts, Synthetic Route of 104-01-8, the main research area is propenoic acid hydroxylamine chiral thiourea tandem aza Michael protonation; hydroxyamino propanoic acid preparation enantioselective.

In this study, an efficient method was developed for controlling carbonyl α-chirality with functionalizing β-position by the conjugate addition-asym. protonation (CAAP) of α,β-unsaturated carboxylic acids using chiral thiourea-amino boronic acid hybrid catalysts. In addition, the method was applied to the asym. synthesis of biol. active compounds

Asian Journal of Organic Chemistry published new progress about Aliphatic amino acids Role: SPN (Synthetic Preparation), PREP (Preparation). 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

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

Li, Yuan-Yuan published the artcileVolatile organic compounds from a Tuber melanosporum fermentation system, Synthetic Route of 21834-92-4, the main research area is volatile organic compound flavor Tuber fermentation.

A total of 59 volatile organic compounds (VOCs) were identified from Tuber melanosporum fermentation: 53 from its fermented mycelia and 32 from the fermentation broth. Alc.-derived compounds were predominant in both the fermentation mycelia and the broth, although long chain fatty acids and isoprenoids were, for the first time, also found in the mycelia. The intense wine bouquet properties of the broth arose from several specific flavor substances, including sulfur compounds, pyrazines, furans and jasmones. Comparing the VOCs identified in this work with those previously reported, our results are more similar to the composition of the Tuber fruiting-body than previous Tuber fermentations The composition and accumulation of flavor volatiles (e.g., pyrazines, sulfur compounds, and esters) and major constituents (e.g., 3-methyl-1-butanol and 2-phenylethanol) in this fermentation were significantly influenced by the sucrose concentration in the medium. The obtained information could therefore be useful in applications to convert the flavors of truffle mycelia similar to those of the fruiting-body by optimizing the fermentation process.

Food Chemistry 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

Hong, Yeun published the artcileAroma characteristics of fermented Korean soybean paste (Doenjang) produced by Bacillus amyloliquefaciens, Recommanded Product: 5-Methyl-2-phenylhex-2-enal, the main research area is aroma Doenjang Bacillus flavor.

Four strains of Bacillus amyloliquefaciens with high proteolytic, fibrinolytic, and angiotensin converting enzyme (ACE) inhibitory activities were used to make Bacillus-koji suitable for the production of functional doenjang. Volatile compounds in Bacillus-koji doenjang were analyzed by headspace-solid phase microextraction-GC-MS (HS-SPME-GC-MS) to compare the aroma profile with those of com. produced doenjang made with traditional meju and with modified koji. Extraction temperatures for SPME were adjusted to 30 and 90°C. Com. samples contained significantly more esters than Bacillus-koji doenjang and demonstrated a more complex volatile compound profile. Pentanoic acid, butanoic acid, or 2/3-Me butanoic acid, known as off-flavor compounds in doenjang, were not detected in one of the Bacillus-koji doenjang when extracted at 30°C. From the sensory test results, the cheese character was less intense in Bacillus-koji doenjang than com. samples, although not all sensory properties projected a significant difference.

Food Science and Biotechnology 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

Azokpota, Paulin published the artcileVolatile compounds profile and sensory evaluation of Beninese condiments produced by inocula of Bacillus subtilis, COA of Formula: C13H16O, the main research area is flavor volatile condiment fermentation Parkia Bacillus.

Three Beninese food condiments (ABS124h, IBS248h and SBS348h) were produced by controlled fermentation of African locust beans using inocula of pure cultures of Bacillus subtilis, BS1, BS2 and BS3, resp. Quant. and qual. assessments of the volatile compounds in the condiments produced have been performed using the Likens-Nickerson simultaneous distillation-extraction method and GC-MS anal., followed by a sensory evaluation in comparison with the spontaneously fermented condiments. A total of 94 volatile compounds were found including 53 compounds identified in relatively high concentrations and were subdivided into 7 main groups with the predominance of 4 major groups: pyrazines, aldehydes, ketones and alcs. Compared to the spontaneously fermented condiments, volatile compounds identified in controlled fermented condiments have been found in high number and in concentrations which varied according to the inoculum of B. subtilis used. The condiments produced with starter cultures scored significantly (P < 0.05) higher for odor than the spontaneously fermented condiments. But the overall acceptability (7/10) of the two types of condiments was similar. CONCLUSION: The investigated B. subtilis, BS1, BS2 and BS3 can be considered as potential starter cultures for the fermentation of African locust beans to produce good quality of Beninese food condiments. Copyright © 2009 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, COA of Formula: C13H16O.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Simon Amoikon, Tiemele Laurent published the artcileA study on the potential of yeasts isolated from palm wines to produce flavouring compounds, COA of Formula: C13H16O, the main research area is Saccharomyces Debaryomyces palm wine synthetic flavouring agent.

Despite the increasing importance of palm wines as a key element in Ivorian socio-cultural practices, and the high involment of yeasts in the production of these beverages, no studies have been devoted to aroma production of yeasts and their potential uses in biotechnol. applications. In this work, aroma profiles of 20 non pathogenic yeast strains (11 from raffia and 9 from ron, representing 13 species) among the 21 yeasts isolated were established using HS-SPME-GC/MS anal. A total of 50 Volatile Organic Compounds (VOCs) produced by these yeasts were identified and grouped into five main families, namely higher alcs., aldehydes, ketones, organic acids and esters. Among these VOCs, esters were the most abundant (28 compounds). Some strains produced specific compounds of technol. interest which could be used for diverse applications, such as beverages, ice creams, baked goods and desserts and synthetic flavouring ingredient. Among them, Hanseniaspora jakobsenii CLIB 3083 produced the highest number of VOCs.

LWT–Food Science and Technology 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, COA of Formula: C13H16O.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Ba, Hoa Van published the artcileFlavor characteristics of Hanwoo beef in comparison with other Korean foods, Related Products of isoquinoline, the main research area is meat Hanwoo beef flavor fatty acid sesame oil volatile; Chungukjang; Doenjang; Hanwoo Beef; Sesame Oil; Volatile Flavor Component.

The present study identified volatile flavor components of Hanwoo longissimus muscle and other Korean foods (Doenjang, Chungukjang, sesame oil) and their traits were compared in relation with flavor precursors that include fatty acids and protein degradation products. Hanwoo longissimus muscle was purchased from a com. abattoir while the other foods were sampled from three sep. households. The results showed totals of 68 (9.94 μg/g), 60 (15.75 μg/g), 49 (107.61 μg/mL) and 50 (7.20 μg/g) volatile components for Doenjang, Chungukjang, sesame oil and Hanwoo beef longissimus, resp. (p<0.05). Aldehydes were the most predominant components in beef, but alcs., acids and esters, and pyrazines are probably the major contributors to the flavor characteristics of other foods. SDS-PAGE revealed that beef longissimus muscle and Doenjang showed higher protein degradation than other foods which could be likely related to chiller ageing and ripening process. The total polyunsaturated fatty acids were approx. 50, 60, 41 and 5% for Doenjang, Chungukjang, sesame oil and beef longissimus muscle, resp. Based on the mechanism(s) of generation of the volatile compounds and the chem. composition of each food sample, differences and traits of volatile flavor components among the four food types are likely due to fatty acid profiles, proteolytic activity and processing conditions. Aroma intense compounds like pyrazines and sulfur-containing compounds were limited in cooked beef in the current exptl. condition (i.e., relatively low heating temperature). This suggests that higher heating temperature as in the case of roasting is needed for the generation of high aroma notes in meat. Furthermore, proteolytic activity and stability of fatty acids during ageing have a great influence on the generation of flavor components in cooked beef. Asian-Australasian Journal of Animal Sciences 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, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Garcia-Cayuela, Tomas published the artcileExpression in Lactococcus lactis of functional genes related to amino acid catabolism and cheese aroma formation is influenced by branched chain amino acids, Recommanded Product: 5-Methyl-2-phenylhex-2-enal, the main research area is Lactococcus araT bcaT kivD aroma branched chain amino acid.

Formation of cheese aroma compounds by Lactococcus lactis from amino acid catabolism depends on a complex network of reactions, which involve enzymes such as aminotransferases, dehydrogenases, lyases, and decarboxylases, among others. Based on the ability of some L. lactis strains to grow with low requirements of amino acids, we have studied in L. lactis IFPL730 the effect of the branched chain amino acid (BCAA) content on the expression of functional genes related to amino acid catabolism and aroma compound formation (araT, bcaT, kivD, ytjE and panE). L. lactis IFPL730 growth rate decreased under leucine, valine or isoleucine starvation but the strain reached similar viable counts at the stationary phase in all culture conditions studied. The level of expression of some genes encoding enzymes involved in amino acid catabolism changed significantly (P < 0.05) when those conditions were compared. Specially, α-ketoisovalerate decarboxylase (kivD), BCAA-specific aminotransferase (bcaT) and C-S lyase (yjtE) gene expressions increased markedly by both isoleucine and valine starvation. In addition to gene expression, formation of volatile compounds was determined in all growth conditions. The results showed that BCAA starvation conditions caused a significant increase (P < 0.05) in the formation of metabolic end products related to cheese aroma, such as 3-methylbutanal and 3-methylbutanol. International Journal of Food Microbiology 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

Owusu, Margaret published the artcileEffect of fermentation method, roasting and conching conditions on the aroma volatiles of dark chocolate, Application of 5-Methyl-2-phenylhex-2-enal, the main research area is fermentation roasting conching volatile dark chocolate.

The combined effect of two cocoa fermentation methods – heap and tray – and different roasting and conching conditions on aroma compounds of dark chocolate were investigated. Dynamic headspace sampling/gas chromatog.-mass spectrometry (GC-MS) was used to isolate and identify aroma volatiles. Odor-active volatiles were detected and identified by gas chromatog.-olfactometry/GC-MS. Fermentation method, roasting and conching conditions influenced mostly the levels of aroma volatiles identified. Principal component anal. based on a reduced data set of 16 important odorants resulted in a total variance explained by two principal components of 81% accounting for fermentation method, roasting and conching conditions. The levels of most important odorants were generally higher at high roasting temperature (150C) but decreased significantly (P < 0.05) with increased conching duration from 6-10 h at 80C. Roasting at high temperature (120C or 150C), coupled with short-time conching (6-8 h) or no conching, makes the difference between heap- and tray-fermented samples more pronounced. Journal of Food Processing and Preservation 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, Application of 5-Methyl-2-phenylhex-2-enal.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Menon, A. Nirmala published the artcileFree and glycosidically bound volatiles of cardamom (Eletteria cardamomum Maton var. miniscula Burkill), Synthetic Route of 1205-17-0, the main research area is cardamom aroma volatiles; terpene cardamom aroma.

The bound aroma compounds from fresh green cardamom (Eletteria cardamomum Maton) were isolated by adsorption on Amberlite XAD-2. The free volatiles were eluted with ether: pentane (1:1) and the bound compounds with methanol. After hydrolysis of the latter fraction with β-glucosidase, the aglycons were identified by GC and GC-MS. The major compounds in this fraction were 3-methylpentan-2-ol, linalool and the cis- and trans-isomers of nerolidol and farnesol.

Flavour and Fragrance Journal published new progress about Alcohols Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Synthetic Route of 1205-17-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem