Month: December 2022

Vivian Goh, Rui Min published the artcileComparative analysis of pomelo volatiles using headspace-solid phase micro-extraction and solvent assisted flavour evaporation, Formula: C11H22O2, the main research area is Citrus volatile compound headspace solid phase microextraction SAFE.

In this work, headspace solid-phase microextraction (HS-SPME) was applied for a comparative study of the volatile profiles of flower, leaf, peel and juice from Malaysia pomelo. Different volatile profiles were observed in these different plant parts based on the anal. results obtained from HS-SPME analyzed by gas chromatog.-mass spectrometry coupled with a flame ionisation detector (GC-MS/FID). Pomelo peel contained the greatest abundance of volatiles, followed by the leaf, flower and juice. Moreover, the temperature parameters for solvent assisted flavor evaporation (SAFE) were systematically optimized using pomelo juice. The optimized water bath temperature was 20 ± 0.5 °C and condenser temperature was 20 ± 0.1 °C. In general, separation of pomelos by country was observed by principal component anal. (PCA). From the PCA loadings plot, compounds such as citronellol and α-terpineol were identified as contributors to separation in HS-SPME peel and juice resp., while nootkatone was identified in SAFE extracts Finally, the sugar and organic acid content of the pomelos were measured by high performance liquid chromatog. (HPLC).

LWT–Food Science and Technology published new progress about Carbohydrates Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 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

Vivian Goh, Rui Min published the artcileComparative analysis of pomelo volatiles using headspace-solid phase micro-extraction and solvent assisted flavour evaporation, Product Details of C11H22O2, the main research area is Citrus volatile compound headspace solid phase microextraction SAFE.

In this work, headspace solid-phase microextraction (HS-SPME) was applied for a comparative study of the volatile profiles of flower, leaf, peel and juice from Malaysia pomelo. Different volatile profiles were observed in these different plant parts based on the anal. results obtained from HS-SPME analyzed by gas chromatog.-mass spectrometry coupled with a flame ionisation detector (GC-MS/FID). Pomelo peel contained the greatest abundance of volatiles, followed by the leaf, flower and juice. Moreover, the temperature parameters for solvent assisted flavor evaporation (SAFE) were systematically optimized using pomelo juice. The optimized water bath temperature was 20 ± 0.5 °C and condenser temperature was 20 ± 0.1 °C. In general, separation of pomelos by country was observed by principal component anal. (PCA). From the PCA loadings plot, compounds such as citronellol and α-terpineol were identified as contributors to separation in HS-SPME peel and juice resp., while nootkatone was identified in SAFE extracts Finally, the sugar and organic acid content of the pomelos were measured by high performance liquid chromatog. (HPLC).

LWT–Food Science and Technology published new progress about Carbohydrates Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Product Details of C11H22O2.

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

Canonico, Laura published the artcileVolatile profile of reduced alcohol wines fermented with selected non-Saccharomyces yeasts under different aeration conditions, Application In Synthesis of 106-32-1, the main research area is Saccharomyces yeast wine aeration condition; Ethanol reduction; Non-saccharomyces yeasts; Oxygen; Wine.

Over the last decades there has been an increase in ethanol concentration in wine. High ethanol concentration may impact neg. wine flavor and can be associated with harmful effects on human health. In this study, we investigated a microbiol. approach to reduce wine ethanol concentration, using three non-Saccharomyces yeast strains (Metschnikowia pulcherrima, Torulaspora delbrueckii and Zygosaccharomyces bailii) in sequential fermentations with S. cerevisiae under different aeration conditions. At the same time, we evaluated the volatile profile of the resulting reduced alc. Chardonnay wines. Results showed that the non-Saccharomyces yeasts tested were able to reduce wine ethanol concentration when oxygen was provided. Compared to S. cerevisiae wines, ethanol reduction was 1.6% volume/volume, 0.9% volume/volume and 1.0% volume/volume for M. pulcherrima, T. delbrueckii and Z. bailii sequential fermentations, resp. Under the conditions evaluated here, aeration did not affect acetic acid production for any of the non-Saccharomyces strains tested. Although aeration affected wine volatile profiles, this was depended on yeast strain. Thus, wines produced with M. pulcherrima under aeration of 0.05 volume of air per volume of culture per min (VVM) showed excessive Et acetate content, while Z. bailli wines produced with 0.05 VVM aeration had increased concentrations of higher alcs. and volatile acids. Increased concentrations of these compounds over their sensory thresholds, are likely to impact neg. on wine sensory profile. Contrarily, all three non-Saccharomyces strains under 0.025 VVM aeration conditions produced wines with reduced ethanol concentration and acceptable chem. volatile profiles.

Food Microbiology published new progress about Carbohydrates Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Application In Synthesis of 106-32-1.

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

Kona, Rajesh published the artcileLutein and β-carotene biosynthesis in Scenedesmus sp. SVMIICT1 through differential light intensities, COA of Formula: C23H46O2, the main research area is Scenedesmus lutein beta carotene light intensity; Biosynthesis Pathway; GC/MS; LC/MS; Lipids; OJIP curve.

The study evaluated the biosynthesis of lutein and β-carotene by Scenedesmus sp. SVMIICT1 under five different light intensities (50, 250, 500, 750 and 1000 μE/m2/s). Liquid chromatog./mass spectrometry (LC/MS) was used to determine relative quantities of lutein and β-carotene. Relatively, high lutein content of 1.43 ± 0.04 and 0.70 ± 0.02 mg/g was found with 50 and 500 μE/m2/s conditions resp. β-Carotene content was quantified as 0.15 ± 0.01, 0.1 ± 0.01 and 0.12 ± 0.02 mg/g with 50, 250 and 500 μE/m2/s conditions resp. The light intensities altered photosystem II and photosystem I. At 50 μE intensity, high chlorophyll content and high photosystem II quantum efficiency (FV/FM) was observed Low FV/FM ratio of around 0.3 was detected in high light intensities (750 μE and 1000 μE) due to photoinhibition. Lipid fraction increased with increasing light intensity and the fatty acid profiles were similar in all five conditions.

Bioresource Technology published new progress about Carbohydrates Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, COA of Formula: C23H46O2.

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

Kona, Rajesh published the artcileLutein and β-carotene biosynthesis in Scenedesmus sp. SVMIICT1 through differential light intensities, Application In Synthesis of 111-11-5, the main research area is Scenedesmus lutein beta carotene light intensity; Biosynthesis Pathway; GC/MS; LC/MS; Lipids; OJIP curve.

The study evaluated the biosynthesis of lutein and β-carotene by Scenedesmus sp. SVMIICT1 under five different light intensities (50, 250, 500, 750 and 1000 μE/m2/s). Liquid chromatog./mass spectrometry (LC/MS) was used to determine relative quantities of lutein and β-carotene. Relatively, high lutein content of 1.43 ± 0.04 and 0.70 ± 0.02 mg/g was found with 50 and 500 μE/m2/s conditions resp. β-Carotene content was quantified as 0.15 ± 0.01, 0.1 ± 0.01 and 0.12 ± 0.02 mg/g with 50, 250 and 500 μE/m2/s conditions resp. The light intensities altered photosystem II and photosystem I. At 50 μE intensity, high chlorophyll content and high photosystem II quantum efficiency (FV/FM) was observed Low FV/FM ratio of around 0.3 was detected in high light intensities (750 μE and 1000 μE) due to photoinhibition. Lipid fraction increased with increasing light intensity and the fatty acid profiles were similar in all five conditions.

Bioresource Technology published new progress about Carbohydrates Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Application In Synthesis of 111-11-5.

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

Kona, Rajesh published the artcileLutein and β-carotene biosynthesis in Scenedesmus sp. SVMIICT1 through differential light intensities, Quality Control of 110-42-9, the main research area is Scenedesmus lutein beta carotene light intensity; Biosynthesis Pathway; GC/MS; LC/MS; Lipids; OJIP curve.

The study evaluated the biosynthesis of lutein and β-carotene by Scenedesmus sp. SVMIICT1 under five different light intensities (50, 250, 500, 750 and 1000 μE/m2/s). Liquid chromatog./mass spectrometry (LC/MS) was used to determine relative quantities of lutein and β-carotene. Relatively, high lutein content of 1.43 ± 0.04 and 0.70 ± 0.02 mg/g was found with 50 and 500 μE/m2/s conditions resp. β-Carotene content was quantified as 0.15 ± 0.01, 0.1 ± 0.01 and 0.12 ± 0.02 mg/g with 50, 250 and 500 μE/m2/s conditions resp. The light intensities altered photosystem II and photosystem I. At 50 μE intensity, high chlorophyll content and high photosystem II quantum efficiency (FV/FM) was observed Low FV/FM ratio of around 0.3 was detected in high light intensities (750 μE and 1000 μE) due to photoinhibition. Lipid fraction increased with increasing light intensity and the fatty acid profiles were similar in all five conditions.

Bioresource Technology published new progress about Carbohydrates Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Quality Control of 110-42-9.

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

Jing, Zheng published the artcileLuteolin attenuates glucocorticoid-induced osteoporosis by regulating ERK/Lrp-5/GSK-3β signaling pathway in vivo and in vitro, Name: 2′,7′-Dichloro-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-diyl diacetate, the main research area is luteolin attenuate glucocorticoid osteoporosis; extracellular signal-regulated kinases (ERK); glucocorticoid-induced osteoporosis (GIO); glycogen synthase kinase 3β (GSK-3β); lipoprotein-receptor-related protein 5 (Lrp-5); luteolin (LUT).

Glucocorticoid-induced osteoporosis (GIO) is a secondary osteoporosis with extensive use of glucocorticoids (GCs). GCs can increase bone fragility and fracture via inhibiting osteoblastic proliferation and differentiation. Luteolin (LUT), a kind of plant flavonoid, has been reported to exhibit the antioxidant activity, but the effects of LUT on GIO still remain unclear. This study aimed to investigate the effects of LUT on GIO both in vivo and in vitro and elaborate the potential mol. mechanisms. LUT increased the superoxide dismutase activity, glutathione level and decreased reactive oxygen species (ROS) level and lactate dehydrogenase release in GIO. Meanwhile, LUT decreased caspase-3, caspase-9, and Bax protein expressions and increased Bcl-2 protein expression in GIO. LUT also enhanced the extracellular signal-regulated kinases (ERK) phosphorylation, glycogen synthase kinase 3β (GSK-3β) phosphorylation, mRNA expression levels of lipoprotein-receptor-related protein 5 (Lrp-5) and β-catenin. These results indicated that LUT promoted proliferation by attenuating oxidative stress and promoted osteoblastic differentiation by regulating the ERK/Lrp-5/GSK-3β pathway in GIO. This study may bring to light the possible mechanisms involved in the action of LUT in GIO treatment, and benefit for further research on GIO.

Journal of Cellular Physiology published new progress about Bone minerals Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 2044-85-1 belongs to class esters-buliding-blocks, name is 2′,7′-Dichloro-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-diyl diacetate, and the molecular formula is C24H14Cl2O7, Name: 2′,7′-Dichloro-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-diyl diacetate.

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

Cadena-Aizaga, M. Isabel published the artcileOccurrence and environmental hazard of organic UV filters in seawater and wastewater from Gran Canaria Island (Canary Islands, Spain), Application of Isopentyl 3-(4-methoxyphenyl)acrylate, the main research area is environmental hazard organic UV filters seawater wastewater; Environmental hazard assessment; Organic ultraviolet filters; Seawater; Solid phase extraction; Wastewater.

Organic UV filters are used in personal care products, but they are also added to industrial products and are constantly released to the environment. This study analyses the occurrence of 8 widely used organic UV filters in seawater from three beaches on the Gran Canaria Island (Spain) and in three wastewater treatment plants (WWTPs) by taking samples from influents and effluents. It also discusses the target compounds’ post-treatment removal efficiencies. Sampling was carried out for 6 mo and analytes were extracted by solid phase extraction with Sep-pak C18 cartridges. They were determined by ultra-high performance liquid chromatog. coupled to mass spectrometry in tandem. The potential environmental hazard associated with the found concentrations was also assessed for marine organisms. Different target compounds were detected on the analyzed beaches and in the wastewater. Benzophenone-3 (BP3) was the most recurrent compound in the seawater samples (frequency detection of 83%) and also in wastewater influents and effluents (measured in all the samples). However, the highest concentrations for seawater (172μg L-1) and influent wastewater (208μg L-1) corresponded to octocrylene, while methylene bis-benzotriazolyltetramethylbutylphenol was the compound most concentrated in secondary treatment effluent (34.0μg L-1) and BP3 in tertiary treatment effluent (8.07μg L-1). All the analyzed samples showed that at least one target UV filter was present. Regarding the removal efficiencies of these compounds in the studied WWTPs, consistent differences between the target compounds were observed in influent concentration terms, where the average removal rates were higher than 50% for most of the compounds Conventional treatment is unable to completely remove many studied compounds, while tertiary treatment acts as an addnl. elimination for some of them. An environmental hazard quotient above 1 was found for octocrylene, benzophenone-3 and 4-methylbenzylidene camphor, which indicates a potential high hazard for living species if these compounds are present.

Environmental Pollution (Oxford, United Kingdom) published new progress about Benzophenones Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 71617-10-2 belongs to class esters-buliding-blocks, name is Isopentyl 3-(4-methoxyphenyl)acrylate, and the molecular formula is C15H20O3, Application of Isopentyl 3-(4-methoxyphenyl)acrylate.

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

Lu, Peng-fei published the artcilePeach volatile emission and attractiveness of different host plant volatiles blends to Cydia molesta in adjacent peach and pear orchards, Quality Control of 111-11-5, the main research area is butyl acetate benzaldehyde monitoring Cydia.

The oriental fruit moth (OFM), Cydia (= Grapholitha) molesta, is a highly damaging pest; peaches are its primary host, and pears serve as post-peach secondary hosts during the late season in China. We collected volatiles from detached peach shoots and fruits, and identified them with gas chromatog.-mass spectrometry (GC-MS). Antennally active compounds were identified by gas chromatog.-electroantennogram detection (GC-EAD), and these were further tested in the laboratory and field. We detected consistent electroantennog. activity was for ten compounds Significantly more C. molesta females were caught with a mixture of female EAD-active compounds identified from the detached matured peach fruits (nonanal, Bu acetate, 3-methylbutyl acetate, hexyl acetate, (Z)-3-hexenyl acetate, linalool and farnesene) than other mixtures mimicking the volatile profile from detached matured fruits or shoots. We identified a new GC-EAD active mixture from intact peach shoots composed of nonanal, (Z)-3-hexenyl acetate, (E)-β-ocimene, and 6-methyl-5-hepten-2-one. In the field test, the background odor of orchards could affect trap catches, and two peach-derived blends together with two previously known pear-derived blends were proven to be able to monitor the seasonal OFM population dispersal in adjacent orchards. These host plant blends will be effective for further designing candidate attractants for season-long C. molesta population dynamic monitoring.

Scientific Reports published new progress about Benzaldehydes Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Quality Control of 111-11-5.

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

Ayestaran, Belen published the artcileEffect of the winemaking process on the volatile composition and aromatic profile of Tempranillo Blanco wines, Name: Ethyl octanoate, the main research area is volatile wine aromatic; Carbonic maceration; PLS; Sensory properties; Tempranillo Blanco wine; Volatile compounds.

The effects of the carbonic maceration and conventional winemaking on the volatile composition and aromatic sensory characteristics of Tempranillo Blanco wines were studied for the first time, during three consecutive vintages. Relationships between instrumental (volatiles) and sensory variables were analyzed applying partial least squares regression (PLS). Carbonic macerated wines had higher contents of alcs. and carbonyl compounds, yet lower concentrations of C6 alcs. and volatile acids than wines conventionally produced. The Odor Activity Values (OAV) exhibited an increase in wines when carbonic maceration was applied. According to the geometric mean (% GM) obtained from aroma descriptors the effect of the winemaking process was significant for seed fruit, ripe fruit and floral notes. When subjected to PLS the data from the instrumental anal. yielded a satisfactory model for the prediction of aroma descriptors in this set of wines.

Food Chemistry published new progress about Aromatic compounds Role: ANT (Analyte), PRP (Properties), ANST (Analytical Study). 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Name: Ethyl octanoate.

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