Category: esters-buliding-blocks

Rajabi, Mehdi published the artcileQSAR Models for Predicting Aquatic Toxicity of Esters Using Genetic Algorithm-Multiple Linear Regression Methods, SDS of cas: 111-11-5, the main research area is Tetrahymena ester decyl acetate aquatic toxicity QSAR model; GA-MLR; Molecular descriptors; QSAR models; Tetrahymena pyriformis; toxicity of aliphatic esters; validation..

Esters are of great importance in industry, medicine, and space studies. Therefore, studying the toxicity of esters is very important. In this research, a Quant. Structure-Activity Relationship (QSAR) model was proposed for the prediction of aquatic toxicity (log 1/IGC50) of aliphatic esters towards Tetrahymena pyriformis using mol. descriptors. A data set of 48 aliphatic esters was separated into a training set of 34 compounds and a test set of 14 compounds A large number of mol. descriptors were calculated with Dragon software. The Genetic Algorithm (GA) and Multiple Linear Regression (MLR) methods were used to select the suitable descriptors and to generate the correlation models that relate the chem. structural features to the biol. activities. The predictive powers of the MLR models are discussed by using Leave-One-Out (LOO) cross-validation and external test set. The best QSAR model is obtained with R2 value of 0.899, Q2 LOO = 0.928, F = 137.73, RMSE = 0.263. The predictive ability of the GA-MLR model with two selected mol. descriptors is satisfactory and it can be used for designing similar group and predicting of toxicity (log 1/IGC50) of ester derivatives

Combinatorial Chemistry & High Throughput Screening published new progress about Aliphatic esters 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, SDS of cas: 111-11-5.

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

McGovern, Toby published the artcileOrganic dust, causing both oxidative stress and Nrf2 activation, is phagocytized by bronchial epithelial cells, Related Products of esters-buliding-blocks, the main research area is organic dust oxidative stress Nrf phagocyte bronchial epithelial cell; airway hyperresponsiveness; bronchial epithelial cells; nuclear factor (erythroid-derived 2)-like 2; organic dust; oxidative stress; phagocytosis.

We sought to determine a mechanism by which OD could induce oxidative stress in bronchial epithelial cells. Human bronchial epithelial cells (BEAS-2B or NHBE) were treated with various concentrations of OD, followed by evaluation of intracellular oxidative stress using 2′,7′-dichlorofluorescein diacetate (DCFDA). After stimulation with OD, gene expression of antioxidant genes was assessed by real-time quant. PCR followed by quantification of Nrf2 nuclear translocation using a luciferase reporter assay. Phagocytic markers (CD36 and CD68) were analyzed by FACS. Cells were treated with an actin inhibitor, cytochalasin D, before OD exposure and evaluated for Nrf2 nuclear translocation and DCFDA. Mice were pretreated with sulforaphane, the Nrf2 activator, before OD exposure and evaluated for pulmonary inflammation and airway reactivity. OD induced a time- and concentration-dependent increase in DCFDA. mRNA expression levels of Nrf2-dependent genes and Nrf2 nuclear translocation were increased after OD exposure. OD exposure increased the expression of CD68 and CD36. Cytochalasin D prevented oxidative stress and Nrf2 nuclear translocation after OD. Pretreatment with sulforaphane prevented OD-induced inflammation and AHR while increasing the uptake of OD in bronchial epithelial cells. Bronchial epithelial cells can phagocytose OD, resulting in an increase in endogenous oxidative stress. Nrf2-dependent mechanisms mediate the antioxidant response to OD.

American Journal of Physiology published new progress about Allophycocyanins 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, Related Products of esters-buliding-blocks.

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

Mifsud, Edin J. published the artcileProphylaxis of ferrets with nitazoxanide and oseltamivir combinations is more effective at reducing the impact of influenza a virus infection compared to oseltamivir monotherapy, Recommanded Product: 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate, the main research area is influenza A virus infection kidney cell oseltamivir nitazoxanide.

Combination therapy is an alternative approach to reduce viral shedding and improve clin. outcomes following influenza virus infections. In this study we used oseltamivir (OST), a neuraminidase inhibitor and nitazoxanide (NTZ), a host directed drug, and found in vitro that the combination of these two antivirals have a synergistic relationship. Using the ferret model of (A/Perth/265/2009, (H1N1)pdm09), virus infections, we found that the combination of NTZ and OST was more effective than either NTZ or OST independently in preventing infection and reducing duration of viral shedding. However, these benefits were only seen if treatment was administered prophylactically, as opposed to therapeutically. We also found that if prophylactically treated ferrets that had detectable virus in the upper respiratory tract, no virus was detected in the lower respiratory tract. This benefit was not observed with NTZ or OST alone. The combination of NTZ and OST enhances the antiviral effect of OST, which is the standard of care in most settings.

Antiviral Research published new progress about Antiviral agents Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 55981-09-4 belongs to class esters-buliding-blocks, name is 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate, and the molecular formula is C12H9N3O5S, Recommanded Product: 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate.

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

Li, Linyi published the artcileSalidroside ameliorated intermittent hypoxia-aggravated endothelial barrier disruption and atherosclerosis via the cAMP/PKA/RhoA signaling pathway, Application of 2′,7′-Dichloro-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-diyl diacetate, the main research area is salidroside cAMP PKA RhoA endothelial barrier disruption atherosclerosis pathway; atherosclerosis; endothelial barrier; intermittent hypoxia; obstructive sleep apnea-hypopnea syndrome; salidroside.

Endothelial barrier dysfunction plays a key role in atherosclerosis progression. The primary pathol. of obstructive sleep apnea-hypopnea syndrome is chronic intermittent hypoxia (IH), which induces reactive oxygen species (ROS) overproduction, endothelial barrier injury, and atherosclerosis. Salidroside, a typical pharmacol. constituent of Rhodiola genus, has documented antioxidative, and cardiovascular protective effects. However, whether salidroside can improve IH-aggravated endothelial barrier dysfunction and atherosclerosis has not been elucidated. In normal chow diet-fed ApoE-/- mice, salidroside (100 mg/kg/d, p. o.) significantly ameliorated the formation of atherosclerotic lesions and barrier injury aggravated by 7-wk IH (21%-5%-21%, 120 s/cycle). In human umbilical vein endothelial cells (HUVECs), exposure to IH (21%-5%-21%, 40 min/cycle, 72 cycles) decreased transendothelial elec. resistance and protein expression of vascular endothelial cadherin (VE-cadherin) and zonula occludens 1. In addition, IH promoted ROS production and activated ras homolog gene family member A (RhoA)/Rho-associated protein kinase (ROCK) pathway. All of these effects of IH were reversed by salidroside. Similar to salidroside, ROCK-selective inhibitors Y26732, and Fasudil protected HUVECs from IH-induced ROS overproduction and endothelial barrier disruption. Furthermore, salidroside increased intracellular cAMP levels, while the PKA-selective inhibitor H-89 attenuated the effects of salidroside on IH-induced RhoA/ROCK suppression, ROS scavenging, and barrier protection. Our findings demonstrate that salidroside effectively ameliorated IH-aggravated endothelial barrier injury and atherosclerosis, largely through the cAMP/PKA/RhoA signaling pathway.

Frontiers in Pharmacology published new progress about Apolipoprotein E 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, Application of 2′,7′-Dichloro-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-diyl diacetate.

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

Kanter, Jean-Philippe published the artcileThe impact of hybrid yeasts on the aroma profile of cool climate Riesling wines, Product Details of C10H20O2, the main research area is Saccharomyces cerevisia aroma climate wine; Aroma; Citronellol (PubChem CID8842); Hotrienol (PubChem CID5366264); Hybrid yeasts; Isoamyl acetate (PubChem CID31276); Linalool (PubChem CID6549); Monoterpenes; Riesling; Saccharomyces cerevisiae var. bayanus; Saccharomyces kudriavzevii; Saccharomyces paradoxus; Sulphur dioxide (PubChem CID1119); Wine flavour; l-Malic acid (PubChem CID222656); α – Terpineol (PubChem CID, 17100).

The current study highlights the effects of intra- and interspecific hybrid yeasts of the genus Saccharomyces (S.) on the alc. fermentation and formation of aroma compounds in cool climate Riesling wines. Three different hybrid yeasts: S. cerevisiae x S. paradoxus (SC x SP), S. cerevisiae x S. kudriavzevii (SC x SK) and S. cerevisiae var. cerevisiae x S. cerevisiae var. bayanus (SC x SB) were investigated. The species S. cerevisiae var. bayanus (SB) was chosen as control variant. It has been demonstrated that the hybrid yeasts have the ability to preserve pos. properties while, suppressing undesired properties from the parental yeast species. The hybrid SC x SK showed an increase of desired acetate esters and monoterpenes. The concentrations of higher alcs. were higher in wines fermented by SC x SP, compared to the other variants. SC x SP fermentations resulted in decreased concentrations of L-malate and sulfites.

Food Chemistry: X published new progress about Esters Role: BSU (Biological Study, Unclassified), BIOL (Biological Study) (acetate). 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Product Details of C10H20O2.

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

Yang, Weiwei published the artcileMechanisms dissection of the combination GRS derived from ShengMai preparations for the treatment of myocardial ischemia/reperfusion injury, Quality Control of 2044-85-1, the main research area is ginsenoside ruscogenin schisandrin combination ShengMai myocardial ischemia reperfusion injury; 23915); 441893); 441922); Ajor chemical compounds studied in this article; Anti-inflammation; Antioxidation; Energy modulation; Ginsenoside Rb1 (PubChem CID; Multiple pathways; Myocardial ischemia/reperfusion injury; Ruscogenin (PubChem CID; Schisandrol a (PubChem CID; Shengmai combination GRS.

Recently, a new drug combination GRS comprising ginsenoside Rb1 (G-Rb1), ruscogenin (R-Rus) and schisandrin (S-SA) was screened based on ShengMai preparations, which exhibited a prominent cardioprotective effects against myocardial ischemia/reperfusion (MI/R) injury. To investigate their systemic and individual mechanism of each compound in combination GRS. The mice model of MI/R and hypoxia/reoxygenation (H/R)-induced cardiomyocytes injury were performed to explore the resp. characteristics of each compound in GRS against myocardial injury. Each component in the combination GRS attenuated MI/R injury as evidenced by decreased myocardial infarct size, ameliorated histol. features, and improved biochem. indicators. Meanwhile, ingredient G, R and S in combination also individually performed a significant decrease of apoptotic index in MI/R mice and H/R-induced cardiomyocytes injury. Mechanistically, component G in GRS could markedly increase the ATP content in cardiomyocytes through activation of AMPKα phosphorylation. Interestingly, the anti-apoptotic actions of G were profoundly attenuated by knockdown of AMPKα, while no alteration was observed on composition R and S. Moreover, component R in GRS significantly reduced the IL-6 and TNF-α mRNA expression, as well as the content of IL-6 via the modulation of NF-κB signaling pathway. Further, component S exhibited the most powerful anti-oxidative capacity in GRS and remarkably decreased the production of MDA and ROS, and potential mechanisms might at least in part through activating the Akt-14-3-3 signaling pathway and inhibiting the phosphorylation of Bad and ERK1/2. Our results indicated that the resp. mechanism of each compound in combination GRS against MI/R injury might closely associated with energy metabolism modulation, suppression of inflammation and oxidative stress.

Journal of Ethnopharmacology published new progress about 14-3-3 Proteins 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, Quality Control of 2044-85-1.

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

Wang, Luyao published the artcileVolatile organic compounds of Hanseniaspora uvarum increase strawberry fruit flavor and defense during cold storage, HPLC of Formula: 111-11-5, the main research area is Hanseniaspora uvarum volatile organic compound flavor cold storage; GC‐MS; Hanseniaspora uvarum; defense‐related enzymes; strawberry; volatile organic compounds.

Volatile organic compounds (VOCs) of antagonistic yeasts are considered as environmental safe fumigants to promote the resistance and quality of strawberry (Fragaria ananassa). By GC-MS assays, VOCs of Hanseniaspora uvarum (H. uvarum) fumigated strawberry fruit showed increased contents of Me caproate (5.8%), Me octanoate (5.1%), and Me caprylate (10.9%) in postharvest cold storage. Possible mechanisms of H. uvarum VOCs involved in regulations of the defense-related enzymes and substances in strawberry were investigated during postharvest storage in low temperature and high humidity (2 ± 1°C, RH 90%-95%). Defense-related enzymes assays indicated H. uvarum VOCs stimulated the accumulation of CAT, SOD, POD, APX, PPO, and PAL and inhibited biosynthesis of MDA in strawberry fruit under storage condition. Moreover, the expression levels of related key enzyme genes, such as CAT, SOD, APX42, PPO, and PAL6, were consistently increased in strawberry fruit after H. uvarum VOCs fumigation.

Food Science & Nutrition (Hoboken, NJ, United States) published new progress about Alcohols, C6-10 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, HPLC of Formula: 111-11-5.

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

Zhang, Lei published the artcilePreharvest spraying calcium ameliorated aroma weakening and kept higher aroma-related genes expression level in postharvest ‘Nanguo’ pears after long-term refrigerated storage, Synthetic Route of 5405-41-4, the main research area is Pyrus calcium chloride aroma weakening LOX HPL ACS storage.

Refrigerated storage postponed the post-ripening of ‘Nanguo’ pears (Pyrusussuriensis Maxim.), but the aromatic esters of the pears were apt to weaken when the fruit was transferred to room temperature CaCl2 treatment, in which the pears were sprayed with 4% CaCl2 during the days before harvest, inhibited the appearance of aromatic weakening of the postharvest pears after long-term refrigerated storage in the study. CaCl2-treated pears presented higher respiration rate, ethylene production and aliphatic acids during ripening in shelf life at room temperature Higher genes expression of lipoxygenase (LOX), and hydroperoxide lyase (HPL), which were associated with LOX pathway, were found in the CaCl2-treated fruit during the ripening in shelf life. The expression levels of genes ACS, ACC, PuEIN4 and PuEIN2 were up-regulated, which were related to ethylene-related pathway. These results demonstrated that the aroma weakening of ‘Nanguo’ pears can be effectively inhibited by CaCl2 treatment and the potential inherent mechanisms are discussed.

Scientia Horticulturae (Amsterdam, Netherlands) published new progress about Aliphatic acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 5405-41-4 belongs to class esters-buliding-blocks, name is Ethyl 3-hydroxybutanoate, and the molecular formula is C6H12O3, Synthetic Route of 5405-41-4.

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

Tondini, Federico published the artcileLinking gene expression and oenological traits: Comparison between Torulaspora delbrueckii and Saccharomyces cerevisiae strains, Application of Ethyl octanoate, the main research area is Torulaspora Saccharomyces acetic acid alc fermentation esterase; BAP2; Indigenous yeast; Transcripts profile; Wine isolates.

Wine fermentations typically involve the yeast Saccharomyces cerevisiae. However, many other yeast species participate to the fermentation process, some with interesting oenol. traits. In this study the species Torulaspora delbrueckii, used occasionally in mixed or sequential fermentation with S. cerevisiae to improve wine sensory profile, was investigated to understand the physiol. differences between the two. Next generation sequencing was used to characterize the transcriptome of T. delbrueckii and highlight the different genomic response of these yeasts during growth under wine-like conditions. Of particular interest were the basic differences in the glucose fermentation pathway and the formation of aromatic and flavor compounds such as glycerol, esters and acetic acid. Paralog genes were missing in glycolysis and glycerol biosynthesis in T. delbrueckii. Results indicate the tendency of T. delbrueckii to produce less acetic acid relied on a higher expression of alc. fermentation related genes, whereas acetate esters were influenced by the absence of esterases, ATF1-2. Addnl., in the Δbap2 S. cerevisiae strain, the final concentration of short branched chain Et esters (SBCEEs) was related to branched chain amino acid (BCAA) uptake. In conclusion, different adaptation strategies are apparent for T. delbrueckii and S. cerevisiae yeasts, an understanding of which will allow winemakers to make better use of such microbial tools to achieve a desired wine sensory outcome.

International Journal of Food Microbiology published new progress about Aromatic compounds 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 of Ethyl octanoate.

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

Javed, Hafiz Umer published the artcileDrying treatments change the composition of aromatic compounds from fresh to dried centennial seedless grapes, Recommanded Product: Ethyl nonanoate, the main research area is hexenal ethyl alc beta damascenone seedless grape drying; SPME-GS/MS (solid-phase microextraction condition-gas chromatography/mass spectrometry) 5; aromatic profile; centennial seedless; free-form volatile compounds; glycosidically bound-form volatile compound.

Raisin aroma is a vital sensory characteristic that determines consumers’ acceptance. Volatile organic compounds (VOCs) in fresh grapes, air-dried (AD), pre-treated air-dried (PAD), sun-dried (SD), and pre-treated sun-dried (PSD) raisins were analyzed, with 99 and 77 free- and bound-form compounds identified in centennial seedless grapes, resp. The hexenal, (E)-2- hexenal, 1-hexanol, Et alc., and Et acetate in free-form while benzyl alc., β-damascenone, gerenic acid in bound-form were the leading compounds Overall, the concentration of aldehydes, alcs., esters, acids, terpenoids, ketones, benzene, and phenols were abundant in fresh grapes but pyrazine and furan were identified in raisin. Out of 99 VOCs, 30 compounds had an odor active value above 1. The intensity of green, floral, and fruity aromas were quite higher in fresh grapes followed by AD-raisins, PAD-raisins, SD-raisins, and PSD-raisins. The intense roasted aroma was found in SD-raisins due to 2,6-diethylpyrazine and 3-ethyl-2,5-dimethylpyrazine. Among raisins, the concentration of unsaturated fatty acid oxidized and Maillard reaction volatiles were higher in SD-raisins and mainly contributed green, fruity and floral, and roasted aromas, resp.

Foods published new progress about Aromatic compounds 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, Recommanded Product: Ethyl nonanoate.

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