Category: esters-buliding-blocks

Li, Junxing published the artcileAssessment of the taro-like aroma of pumpkin fruit (Cucurbita moschata D.) via E-nose, GC-MS and GC-O analysis, Synthetic Route of 106-32-1, the main research area is Cucurbita E nose gas chromatog mass spectrometry olfactometry; 2-Acetyl-1-pyrroline; E-nose; GC-O; GC–MS; Pumpkin; Volatile compounds; ‘taro-like’ aroma.

Taro-like aroma is a pleasant flavor and value-added trait in pumpkin species imparted by unknown key volatile compounds In this study, we used the electronic nose (E-nose), gas chromatog.-mass spectrometry (GC-MS), and GC-Olfactometry (GC-O) to study the aroma profile, volatile compounds, and key contributors, resp. By E-nose and GC-MS, we found significant differences in the aroma profiles and volatile compounds between fruits from five samples with/without taro-like aroma. According to the anal. of differential volatile compounds obtained from GC-MS and the GC-O anal. of the sample with taro-like aroma, we found that 2-acetyl-1-pyrroline representing the taro odor was only identified in the sample with taro-like aroma. Therefore, we conclude that 2-acetyl-1-pyrroline is the key contributor to the taro-like aroma. Moreover, the relationship between 2-acetyl-1-pyrroline and taro-like aroma was further verified via other pumpkin samples. Our results provide a theor. basis for understanding the aroma characteristics of pumpkin fruit.

Food Chemistry: X published new progress about Aldehydes Role: ANT (Analyte), BSU (Biological Study, Unclassified), ANST (Analytical Study), BIOL (Biological Study). 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Synthetic Route of 106-32-1.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Xagoraris, Marinos published the artcileUnifloral Autumn Heather Honey from Indigenous Greek Erica manipuliflora Salisb.: SPME/GC-MS Characterization of the Volatile Fraction and Optimization of the Isolation Parameters, Name: Methyl octanoate, the main research area is Erica norisoprenoid benzaldehyde safranal honey 4methoxybenzoate ethyl anisate; Erica manipuliflora Salisb.; autumn heather honey; gas chromatography-mass spectrometry; optimization; response surface methodology; solid-phase microextraction; volatiles.

For long heather honey has been a special variety due to its unique organoleptic characteristics. This study aimed to characterize and optimize the isolation of the dominant volatile fraction of Greek autumn heather honey using solid-phase microextraction (SPME) followed by gas chromatog.-mass spectrometry (GC-MS). The described approach pointed out 13 main volatile components more closely related to honey botanical origin, in terms of occurrence and relative abundance. These volatiles include phenolic compounds and norisoprenoids, with benzaldehyde, safranal and p-anisaldehyde present in higher amounts, while Et 4-methoxybenzoate is reported for the first time in honey. Then, an exptl. design was developed based on five numeric factors and one categorical factor and evaluated the optimum conditions (temperature: 60 °C, equilibration time: 30 min extraction time: 15 min magnetic stirrer velocity: 100 rpm sample volume: 6 mL water: honey ratio: 1:3 (v/w)). Addnl., a validation test set reinforces the above methodol. investigation. Honey is very complex and variable with respect to its volatile components given the high diversity of the floral source. As a result, customizing the isolation parameters for each honey is a good approach for streamlining the isolation volatile compounds This study could provide a good basis for future recognition of monofloral autumn heather honey.

Foods published new progress about Aldehydes Role: ANT (Analyte), BSU (Biological Study, Unclassified), ANST (Analytical Study), BIOL (Biological Study). 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Name: Methyl octanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Xagoraris, Marinos published the artcileUnifloral Autumn Heather Honey from Indigenous Greek Erica manipuliflora Salisb.: SPME/GC-MS Characterization of the Volatile Fraction and Optimization of the Isolation Parameters, Synthetic Route of 110-42-9, the main research area is Erica norisoprenoid benzaldehyde safranal honey 4methoxybenzoate ethyl anisate; Erica manipuliflora Salisb.; autumn heather honey; gas chromatography-mass spectrometry; optimization; response surface methodology; solid-phase microextraction; volatiles.

For long heather honey has been a special variety due to its unique organoleptic characteristics. This study aimed to characterize and optimize the isolation of the dominant volatile fraction of Greek autumn heather honey using solid-phase microextraction (SPME) followed by gas chromatog.-mass spectrometry (GC-MS). The described approach pointed out 13 main volatile components more closely related to honey botanical origin, in terms of occurrence and relative abundance. These volatiles include phenolic compounds and norisoprenoids, with benzaldehyde, safranal and p-anisaldehyde present in higher amounts, while Et 4-methoxybenzoate is reported for the first time in honey. Then, an exptl. design was developed based on five numeric factors and one categorical factor and evaluated the optimum conditions (temperature: 60 °C, equilibration time: 30 min extraction time: 15 min magnetic stirrer velocity: 100 rpm sample volume: 6 mL water: honey ratio: 1:3 (v/w)). Addnl., a validation test set reinforces the above methodol. investigation. Honey is very complex and variable with respect to its volatile components given the high diversity of the floral source. As a result, customizing the isolation parameters for each honey is a good approach for streamlining the isolation volatile compounds This study could provide a good basis for future recognition of monofloral autumn heather honey.

Foods published new progress about Aldehydes Role: ANT (Analyte), BSU (Biological Study, Unclassified), ANST (Analytical Study), BIOL (Biological Study). 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Synthetic Route of 110-42-9.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Leng, Peng published the artcileHS-GC-IMS with PCA to analyze volatile flavor compounds of honey peach packaged with different preservation methods during storage, Formula: C10H20O2, the main research area is Amygdalus HSGCIMS PCA storage isoamyl acetate benzaldehyde hexanal nhexanol.

In this study, the flavor fingerprint of post-harvest peach fruits from Amygdalus persica L. Yingshuanghong (YSH) was developed and volatile organic compounds (VOCs) were investigated via headspace-gas chromatog.-ion mobility spectrometry (HS-GC-IMS) combining with principal component anal. (PCA). Results identified 52 signal peaks corresponding to 32 compounds were classify as esters, aldehydes, ketones, and alcs. However, 10 compounds were unknown. Differences in the VOCs of peach fruits packaged with different preservation methods during storage were revealed in topog. plots and fingerprints. Increased storage time increase the YSH’s VOCs content produced due to ripening, especially esters, such as isoamyl acetate, Et octanoate, and Et butyrate. In contrast, the content of aldehydes and alcs. contents decreased, including benzaldehyde, (E)-2-hexenal, 2-methylbutanal, hexanal and n-hexanol. Subsequently, PCA was performed based on the signal intensity of the identified VOCs, and the results clearly showed that these samples would be well distinguished in a relatively independent space. The Y2 group (nano-composition packaging materials) had a good application prospect in the post-harvest preservation of honey peaches. Flavor visual spectrum could be of great potential to predict the maturity of the fruits and evaluate preservation efficiency differences in the future.

LWT–Food Science and Technology published new progress about Aldehydes Role: ANT (Analyte), BSU (Biological Study, Unclassified), ANST (Analytical Study), BIOL (Biological Study). 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Formula: C10H20O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Abubaker, Mohamed Aamer published the artcileGas chromatography-mass spectrum and fourier-transform infrared spectroscopy analysis of fixed oil from Sudanese Ziziphus spina Christi fruits pulp, Product Details of C23H46O2, the main research area is Ziziphus spina Christi fixed oil GC MS FTIR analysis.

The study was carried out in reason of investigating the phytochem. constituents that could be present in the Ziziphus spina Christi Sudanese plant, by using two different anal. methods such as the Gas Chromatog.-Mass spectrum (GC-MS) and the Fourier-transform IR spectroscopy (FTIR). The Z. spina Christi Fruit pulp oil was extracted with four solvents methanol, petroleum ether, acetone, and iso-Pr alc., using Soxhlet apparatus, The Gas Chromatog.-Mass Spectrum (GC-MS) was carried out to analyze the methanolic fruit pulp oil extract, the results indicated to the presence of thirty-two phytochem. compounds Ten of them are majors, namely9-Octadecenoic acid compounds, Me ester, (E) – (17.07%), 7-Oxabicyclo[4.1.0]heptane,1-methyl-4-(2-methyloxiranyl)- (16.43%), 9-Octadecenoic acid (Z) -, Me ester (10.6%), Hexadecanoic acid, Me ester (8.78%), Me stearate (6.71%), Docosanoic acid, Me ester (4.22%), cis-13-Eicosenoic acid, Me ester (3.43%)%, Me 18-methylnonadecanoate (2.98%), squalene (2.38%), 9-tricosine, (Z) – (2.4%). While the Fourier-transform IR spectroscopy (FTIR) anal. was carried out for (methanol, petroleum ether, acetone, and iso-Pr alc.) fruit pulp oil extract the result showed the presence of many active functional groups such as alcs., phenols, alkanes, alkenes, carbonyls, and Carboxylic acids and aromatic compounds in the extracts with different peak types and correspondences. The GC-MS and FTIR anal. showed the availability of bioactive compounds in the Ziziphus spina fruits pulp oil extracts, and these ingredients may be responsible for pharmaceutical value and could lead to the discovery a novel drugs.

Progress in Chemical and Biochemical Research published new progress about Aliphatic compounds Role: ANT (Analyte), BSU (Biological Study, Unclassified), ANST (Analytical Study), BIOL (Biological Study). 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, Product Details of C23H46O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Lopes, Ana Claudia Alencar published the artcileProduction and characterization of a new distilled beverage from green coffee seed residue, Formula: C11H22O2, the main research area is green coffee seed residue beverage; Coffee byproducts; Coffee spirit; Volatile compounds.

This study evaluated green coffee seed residue (GCSR) as an alternative substrate for producing distilled beverages. Two proportions of GCSR, 10% and 20% (w/v), were fermented and distilled in a copper alembic still. The spirits were characterized by GC-FID, HS-SPME GC-MS, and sensory anal. by trained panelists. Most of the 62 identified volatile compounds were affected by the GCSR concentration Total terpenes, higher alcs., and acetals showed the highest concentrations in the 10% GCSR spirit. Esters, acetates, and aldehydes were most abundant in the 20% GCSR. In the sensory anal., the 10% GCSR spirit was characterized by floral, dairy, and almond aromas, while the 20% GCSR spirit was embodied coffee, vegetable, hazelnut, cooked cabbage, and nut descriptors. The results demonstrate the potential of GCSR as a substrate for producing coffee spirits with chem. and sensory qualities, with the 10% GCSR being the better option for fermentation

Food Chemistry published new progress about Almond. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Formula: C11H22O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Qian, Heying published the artcileMetabolic characterization of hemolymph in Bombyx mori varieties after Bombyx mori nucleopolyhedrovirus infection by GC-MS-based metabolite profiling, SDS of cas: 110-42-9, the main research area is BmNPV infection hemolymph oxidative phosphorylation GC MS.

The “”Huakang 2″” silkworm variety, bred by the Sericulture Research Institute of the Chinese Academy of Agricultural Sciences, is highly resistant to Bombyx mori nucleopolyhedrovirus (BmNPV) and effectively solves the issue of frequent Bombyx mori nuclear polyhedrosis in sericultural production The mol. mechanism of its resistance to BmNPV, however, is still unknown. The purpose of the present study was therefore to identify these anti-BmNPV mechanisms by using metabolomics in combination with transcriptomics after s.c. injection of budded virus (BV) with high concentrations of BmNPV from specimens of the Baiyu N variety (which is highly resistant to BmNPV) and the Baiyu variety (which is sensitive to BmNPV). A total of 375 differential metabolites were identified, which mainly included sugars, acids, amines, alcs., glycosides, and other small mols. KEGG enrichment anal. and functional clustering of differential metabolites identified possible metabolic pathways, including tyrosine metabolism, oxidative phosphorylation, and alanine, aspartate, and glutamate metabolism The differentially expressed genes (DEGs) identified by transcriptome anal. were annotated in KEGG. Association anal. showed that the metabolic pathways of different silkworm varieties are affected differently by BmNPV infection, triggering a series of complex physiol. and biochem. changes in the organism. In particular, oxidative phosphorylation might be an essential pathway involved in regulation of disease resistance.

Archives of Virology published new progress about Amines Role: ANT (Analyte), BSU (Biological Study, Unclassified), ANST (Analytical Study), BIOL (Biological Study). 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, SDS of cas: 110-42-9.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Qian, Heying published the artcileMetabolic characterization of hemolymph in Bombyx mori varieties after Bombyx mori nucleopolyhedrovirus infection by GC-MS-based metabolite profiling, COA of Formula: C9H18O2, the main research area is BmNPV infection hemolymph oxidative phosphorylation GC MS.

The “”Huakang 2″” silkworm variety, bred by the Sericulture Research Institute of the Chinese Academy of Agricultural Sciences, is highly resistant to Bombyx mori nucleopolyhedrovirus (BmNPV) and effectively solves the issue of frequent Bombyx mori nuclear polyhedrosis in sericultural production The mol. mechanism of its resistance to BmNPV, however, is still unknown. The purpose of the present study was therefore to identify these anti-BmNPV mechanisms by using metabolomics in combination with transcriptomics after s.c. injection of budded virus (BV) with high concentrations of BmNPV from specimens of the Baiyu N variety (which is highly resistant to BmNPV) and the Baiyu variety (which is sensitive to BmNPV). A total of 375 differential metabolites were identified, which mainly included sugars, acids, amines, alcs., glycosides, and other small mols. KEGG enrichment anal. and functional clustering of differential metabolites identified possible metabolic pathways, including tyrosine metabolism, oxidative phosphorylation, and alanine, aspartate, and glutamate metabolism The differentially expressed genes (DEGs) identified by transcriptome anal. were annotated in KEGG. Association anal. showed that the metabolic pathways of different silkworm varieties are affected differently by BmNPV infection, triggering a series of complex physiol. and biochem. changes in the organism. In particular, oxidative phosphorylation might be an essential pathway involved in regulation of disease resistance.

Archives of Virology published new progress about Amines Role: ANT (Analyte), BSU (Biological Study, Unclassified), ANST (Analytical Study), BIOL (Biological Study). 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, COA of Formula: C9H18O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Jeong, Yun-Kyung published the artcileIntramolecular hydroalkoxylation in Bronsted acidic ionic liquids and its application to the synthesis of (±)-centrolobine, Computed Properties of 86549-27-1, the main research area is sulfonic acid substituted triazolium imidazolium ionic liquid preparation; cyclic ether preparation; racemic centrolobine stereoselective preparation; hydroalkoxylation unsaturated alc sulfonic acid substituted ionic liquid catalyst; stereoselective cyclization unsaturated alc sulfonic acid substituted ionic liquid; Bronsted acidic ionic liquid preparation catalyst stereoselective cyclization.

Sulfonic acid-substituted triazolium and imidazolium ionic liquids such as I·CF3SO3- (X = N, CH) are prepared; I·CF3SO3- (X = N, CH) act as catalysts for the cyclization reactions of alkenyl alcs. such as HOCH2CMe2CH2CH:CH2 to give cyclic ethers such as 2,4,4-trimethyltetrahydrofuran. (±)-Centrolobine II (R = H) is prepared using the stereoselective cyclization of III to II (R = PhCH2) in the presence of I·CF3SO3- (X = N or CH) as the key step; III is prepared in three steps from p-anisaldehyde and 4-benzyloxyphenylethyl bromide. I·CF3SO3- (X = N) can be used three times for the cyclization of 2,2-diphenyl-4-penten-1-ol to 2-methyl-4,4-diphenyltetrahydrofuran.

Organic & Biomolecular Chemistry published new progress about Cyclic ethers Role: SPN (Synthetic Preparation), PREP (Preparation). 86549-27-1 belongs to class esters-buliding-blocks, name is Ethyl 2,2-dimethylpent-4-enoate, and the molecular formula is C9H16O2, Computed Properties of 86549-27-1.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Jiang, Xiaohui published the artcileEffects of pectinase treatment on the physicochemical and oenological properties of red dragon fruit wine fermented with Torulaspora delbrueckii, Name: Ethyl nonanoate, the main research area is Torulaspora Hylocereus fruit wine pectinase fermentation.

Red dragon fruit is a popular tropical fruit that has been highly prized for its health benefits partially attributed to the high antioxidant content. Nevertheless, besides being consumed fresh, further processing into juice or other products is scarce due to its high pectin content that presents a challenge in industrial processing. In this study, we evaluated the effects of pectinase pre-treatment on red dragon fruit wine fermented with Torulaspora delbrueckii. Pectinase enzyme (Pectinex Ultra SP-L, added at 0.1% volume/volume) was applied after pasteurization of juice followed by fermentation with T. delbrueckii at 20°C for 14 days. Pectinase pre-treatment did not affect the yeast growth, nor the production of ethanol (8% volume/volume) and glycerol (6 g/L), but significantly increased juice/wine yield by 16% volume/volume In addition, pectinase treated samples after fermentation remained significantly higher levels of residual nitrogen containing compounds, indicating unfavorable fermentation conditions and impaired metabolism of the yeast. Moreover, fermented pectinase treated samples possessed the aroma compound profiles with enriched esters and terpenes but decreased higher alcs. Furthermore, pectinase treatment increased the total phenolic content, but decreased betacyanins content and color intensity compared to control sample. The findings would have practical significance for diversifying products from red dragon fruit.

LWT–Food Science and Technology published new progress about Fermentation. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Name: Ethyl nonanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics