13,354 results match your criteria ethyl ester


Phthalic acid esters degradation by a novel marine bacterial strain Mycolicibacterium phocaicum RL-HY01: Characterization, metabolic pathway and bioaugmentation.

Sci Total Environ 2021 Jun 5;791:148303. Epub 2021 Jun 5.

Shenzhen Research Institute of Guangdong Ocean University, Shenzhen 518108, China; College of Coastal Agricultural Sciences, School of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, China. Electronic address:

Phthalic acid esters (PAEs) are one of the most widely used plasticizers and the well-studied environmental pollutants with endocrine disrupting properties. Investigation about PAEs in terrestrial ecosystem has been extensively conducted while the fate of PAEs in marine environment remains underexplored. In this study, a novel di-(2-ethylhexyl) phthalate (DEHP) degrading marine bacterial strain, Mycolicibacterium phocaicum RL-HY01, was isolated and characterized from intertidal sediments. Read More

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Synthesis of lipophilic arbutin ester by enzymatic transesterification in high pressure carbon dioxide.

Authors:
Kuan-Ju Liu

Enzyme Microb Technol 2021 Aug 13;148:109818. Epub 2021 May 13.

Department of Food Science, National Penghu University of Science and Technology, Makung City, Penghu, 880011, Taiwan, ROC. Electronic address:

In this study, a novel one-step enzymatic acylation was developed for the synthesis of hydrophobic arbutin ester, by using supercritical carbon dioxide (SC-CO) as the reaction solvent. Immobilized Novozym 435 from Candida antarctica was identified as the best biocatalyst for producing arbutin palmitate through transesterification between arbutin and palmitic acid ethyl ester in SC-CO. A transesterification yield of 85. Read More

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Aroma characteristics of traditional Huangjiu produced around Winter Solstice revealed by sensory evaluation, gas chromatography-mass spectrometry and gas chromatography-ion mobility spectrometry.

Food Res Int 2021 Jul 19;145:110421. Epub 2021 May 19.

Department of Food Science and Technology, Shanghai Institute of Technology, Shanghai, China. Electronic address:

Traditional Huangjiu (a kind of traditional Chinese rice wine) produced around Winter Solstice has higher quality and a more harmonious aroma than those produced during other periods. To determine the specific differences in aroma characteristics, sensory evaluation, gas chromatography-mass spectrometry (GC-MS) and gas chromatography-ion mobility spectrometry (GC-IMS) were used to analyze the volatile profiles of the traditional Huangjiu samples produced under different ambient temperature conditions. The sensory evaluation results showed that the aroma attributes of wheat, sweet, ester, alcoholic and sauce were stronger for the samples fermented near Winter Solstice than those for the other samples. Read More

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In vitro intestinal digestion of lipids from the marine diatom Porosira glacialis compared to commercial LC n-3 PUFA products.

PLoS One 2021 9;16(6):e0252125. Epub 2021 Jun 9.

Norwegian College of Fishery Science, UiT The Arctic University of Norway, Tromsø, Norway.

Marine sources of long chain omega-3 polyunsaturated fatty acids (LC n-3 PUFA) are in high demand for use in health supplements. Mass cultivated marine microalgae is a promising and sustainable source of LC n-3 PUFA, which relieves pressure on natural fish stocks. The lipid class profile from cultivated photosynthetic algae differ from the marine organisms currently used for the production of LC n-3 PUFA. Read More

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A comparative GC-MS analysis of bioactive secondary metabolites produced by halotolerant Bacillus spp. isolated from the Great Sebkha of Oran.

Int Microbiol 2021 Jun 7. Epub 2021 Jun 7.

Laboratory of Applied Microbiology in Food, Biomedical and Environment (LAMAABE), Faculty of Nature and Life, Earth and Universe Sciences, Department of Biology, Aboubekr Belkaïd University of Tlemcen, Tlemcen, Algeria.

The reemergence of infectious diseases and resistant pathogens represents a serious problem for human life. Hence, the screening for new or alternative antimicrobial compounds is still urgent. Unusual ecosystems such as saline habitats are considered promising environments for the purposes of isolating bacterial strains able to produce potent natural products. Read More

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Evolution of volatile profile and aroma potential of 'Gold Finger' table grapes during berry ripening.

J Sci Food Agric 2021 Jun 6. Epub 2021 Jun 6.

Shaanxi Engineering Research Center for Viti-Viniculture, College of Enology, Northwest A&F University, Yangling, Shaanxi, 712100, China.

Background: 'Gold Finger' is a grape cultivar with a finger-like shape and milk flavor. The evolution process of its aroma profile during ripening is unclear. Thus, changes in the free and bound volatile compounds present in 'Gold Finger' grapes during ripening were investigated using headspace sampling-solid-phase microextraction-gas chromatography-mass spectroscopy (HS-SPME-GC-MS). Read More

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The Potential of as a Pigment-Stabilizer to Improve the Pigments Preservation, Flavor Profiles, and Sensory Characteristic of Huangjiu.

Front Microbiol 2021 20;12:678903. Epub 2021 May 20.

Shanghai Engineering Research Center of Food Microbiology, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, China.

Hong Qu Huangjiu (HQW) is distinguished by its inclusion of pigments, meaning that photosensitivity strongly affects the sensory quality of the wine. In this study, the effects of () on the stability of pigments, the flavor profiles, and the sensory characteristics of HQW were investigated. After sterilization, the addition of increased the preservation rate of pigments in HQW by up to 93. Read More

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Fate of Protonated Formates in the Gas Phase.

J Phys Chem A 2021 Jun 4. Epub 2021 Jun 4.

Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa K1N 6N5, Canada.

Formates are a class of organic molecules emitted into the atmosphere from fuel additives and industrial solvents. Formate-derived esters can undergo a vast range of chemical reactions in the atmosphere, most of which are initiated by oxidation by hydroxyl radicals. One potential reaction upon their interaction with atmospheric water is proton transfer to form protonated formates. Read More

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Characterization of allelochemicals from Pistia stratiotes extracts and their effects on the growth and physiology of Microcystis aeruginosa.

Environ Sci Pollut Res Int 2021 Jun 4. Epub 2021 Jun 4.

Institute of Chemistry, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil.

Due to the public and environmental health impact of cyanotoxins, investigations have been focused on finding environmental friendly algaecides from aquatic plants. The present study had the objective to evaluate the population control and physiological response of Microcystis aeruginosa (Kützing) Kützing (strain BCCUSP232) exposed to Pistia stratiotes L. extracts. Read More

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Prenatal phthalate exposure reduction through an integrated intervention strategy.

Environ Sci Pollut Res Int 2021 Jun 4. Epub 2021 Jun 4.

School of Laboratory Medicine, Hubei University of Chinese Medicine, 16 Huangjia Lake West Road, Wuhan, 430065, China.

Pregnancy represents a sensitive susceptibility window to phthalate esters (PAEs). In this study, we develop an intervention strategy for reducing the exposure of pregnant women to phthalates. Thirty-five pregnant women, who initially underwent maternity examination, were recruited from an ongoing longitudinal prospective prenatal cohort study. Read More

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Multi-Statistical Approach for the Study of Volatile Compounds of Industrial Spoiled Manzanilla Spanish-Style Table Olive Fermentations.

Foods 2021 May 24;10(6). Epub 2021 May 24.

Food Biotechnology Department, Instituto de la Grasa (CSIC), University Pablo de Olavide, Building 46, Crta, Utrera km 1, 41013 Seville, Spain.

Table olives can suffer different types of spoilage during fermentation. In this work, a multi-statistical approach (standard and compositional data analysis) was used for the study of the volatile organic compounds (VOCs) associated with altered (butyric, sulfidic, and putrid) and non-altered (normal) Manzanilla Spanish-style table olive fermentations. Samples were collected from two industrial fermentation yards in Seville (Spain) in the 2019/2020 season. Read More

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Phytochemical Fingerprinting and In Vitro Antimicrobial and Antioxidant Activity of the Aerial Parts of Willd. and Klokov Growing Widely in Southern Kazakhstan.

Molecules 2021 May 26;26(11). Epub 2021 May 26.

Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Medical University of Lublin, Chodźki Street 1, 20-093 Lublin, Poland.

The chemical composition of the hydroethanolic extracts (60% ) from the aerial parts of Willd (TM) and Klokov (TS) from Southern Kazakhstan flora was analyzed together with their hexane fractions. Determination of antibacterial, antifungal and antioxidant activities of both extracts was also performed. RP-HPLC/PDA and HPLC/ESI-QTOF-MS showed that there were some differences between the composition of both extracts. Read More

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Highly Water Dispersible Functionalized Graphene by Thermal Thiol-Ene Click Chemistry.

Materials (Basel) 2021 May 25;14(11). Epub 2021 May 25.

School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA 5005, Australia.

Functionalization of pristine graphene to achieve high water dispersibility remains as a key obstacle owing to the high hydrophobicity and absence of reactive functional groups on the graphene surface. Herein, a green and simple modification approach to prepare highly dispersible functionalized graphene via thermal thiol-ene click reaction was successfully demonstrated on pristine graphene. Specific chemical functionalities (-COO, -NH and -S) on the thiol precursor (L-cysteine ethyl ester) were clicked directly on the sp carbon of graphene framework with grafting density of 1 unit L-cysteine per 113 carbon atoms on graphene. Read More

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Triterpenoids from Stem Barks Reduce Nitrite Levels in LPS-Stimulated Macrophages.

Plants (Basel) 2021 May 18;10(5). Epub 2021 May 18.

Department of Pharmacy, School of Medicine and Surgery, University of Naples Federico II, Via Domenico Montesano 49, 80131 Naples, Italy.

C. F. Gaertn is widely used in African traditional medicine as an anti-inflammatory remedy to treat rheumatism, gastric problems, diarrhea, and dysentery. Read More

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Caffeic Acid Phenyl Ester (CAPE) Protects against Iron-Mediated Cellular DNA Damage through Its Strong Iron-Binding Ability and High Lipophilicity.

Antioxidants (Basel) 2021 May 18;10(5). Epub 2021 May 18.

State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, The Chinese Academy of Sciences, Beijing 100085, China.

Caffeic acid phenethyl ester (CAPE) and its structurally-related caffeic acid (CA), ferulic acid (FA) and ethyl ferulate (EF) are constituents of honeybee propolis that have important pharmacological activities. This study found that CAPE-but not CA, FA, and EF-could effectively prevent cellular DNA damage induced by overloaded iron through decreasing the labile iron pool (LIP) levels in HeLa cells. Interestingly, CAPE was found to be more effective than CA in protecting against plasmid DNA damage induced by Fe(II)-HO or Fe(III)-citrate-ascorbate-HO via the inhibition of hydroxyl radical (•OH) production. Read More

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3,3'-Diindolylmethane Suppresses the Growth of Hepatocellular Carcinoma by Regulating Its Invasion, Migration, and ER Stress-Mediated Mitochondrial Apoptosis.

Cells 2021 May 12;10(5). Epub 2021 May 12.

Laboratory of Liver Regeneration, Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju 54907, Korea.

Hepatocellular carcinoma (HCC) is the leading cause of cancer-related death worldwide with limited treatment options. Biomarker-based active phenolic flavonoids isolated from medicinal plants might shed some light on potential therapeutics for treating HCC. 3,3'-diindolylmethane (DIM) is a unique biologically active dimer of indole-3-carbinol (I3C), a phytochemical compound derived from Brassica species of cruciferous vegetables-such as broccoli, kale, cabbage, and cauliflower. Read More

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Lipase immobilization on biodegradable film with sericin.

Biotechnol Appl Biochem 2021 May 30. Epub 2021 May 30.

Universidade Tecnológica Federal do Paraná, Câmpus Apucarana - Coordenação de Licenciatura em Química (COLIQ), Apucarana, PR, Brazil.

An ecofriendly and low-cost film composed by cassava starch, polyvinyl alcohol, and sericin blend (CS-PVA-SS) was synthesized, characterized, and applied as a novel support for Botryosphaeria ribis EC-01 lipase immobilization by enzyme-film-enzyme adsorption. Film revealed thickness between 230 and 309 μm and higher flexibility and malleability in comparison with film without SS. Based on p-nitrophenyl palmitate hydrolysis reaction, the activity retention of immobilized lipase was 987%. Read More

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Phosphate functionalised titania for heavy metal removal from acidic sulfate solutions.

J Colloid Interface Sci 2021 May 12;600:719-728. Epub 2021 May 12.

ANSTO, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia. Electronic address:

Adsorbent materials based on titania and phosphate are ideal for treatment of solutions contaminated with heavy metals under acidic conditions, due to their inherent chemical stability and low pKa. Herein, phosphate functionalised titania has been investigated for the first time for removal of heavy metals (Cr, Fe, Cu, Eu, U) under conditions relevant to acid mine drainage (pH 2-5 sulfuric acid). Successful functionalisation was found to depend on the phase of titania used, with anatase preferred according to computational results from density functional theory. Read More

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Antifungal activity and molecular docking of phenol, 2,4-bis(1,1-dimethylethyl) produced by plant growth-promoting actinobacterium Kutzneria sp. strain TSII from mangrove sediments.

Arch Microbiol 2021 May 28. Epub 2021 May 28.

Department of Microbiology, Science Campus, Alagappa University, Karaikudi, Tamilnadu, India.

The present study reveals the plant growth-promoting (PGP) potentials and characterizes the antifungal metabolites of Kutzneria sp. strain TSII isolated from mangrove sediment soil through in vitro and in silico studies. In this study, Kutzneria sp. Read More

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Chemical profiling and in-vitro anti-inflammatory activity of bioactive fraction(s) from Trichodesma indicum (L.) R.Br. against LPS induced inflammation in RAW 264.7 murine macrophage cells.

J Ethnopharmacol 2021 May 24:114235. Epub 2021 May 24.

Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru-570015, Karnataka, India; Centre for Experimental Pharmacology & Toxicology, Central Animal Facility, JSS Academy of Higher Education & Research, Mysuru-570015, Karnataka, India. Electronic address:

Ethnopharmacological Relevance: Trichodesma indicum (L.) R.Br. Read More

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Effects of Obligate Heterofermentative Lactic Acid Bacteria Alone or in Combination on the Conservation of Sugarcane Silage.

Front Microbiol 2021 10;12:643879. Epub 2021 May 10.

Department of Animal Science, State University of Maringá, Maringá, Brazil.

Our objective was to determine the effects of two strains of obligate heterofermentative bacteria, alone or in combination, on the fermentation profile, gas production kinetics, chemical composition, and aerobic stability of sugarcane silage. A plot of sugarcane was manually harvested, mechanically chopped and treated with: distilled water (5 mL kg; Control), CNCM I-4785 [3 × 10 colony-forming units (cfu) g; LH], NCIMB 40788 (3 × 10 cfu g; LB), and LH+LB (1.5 × 10 cfu g of each strain). Read More

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-Nitroso--acetyl-l-cysteine Ethyl Ester (SNACET) Catheter Lock Solution to Reduce Catheter-Associated Infections.

ACS Appl Mater Interfaces 2021 Jun 24;13(22):25813-25824. Epub 2021 May 24.

School of Chemical, Materials and Biomedical Engineering, University of Georgia, Athens, Georgia 30602, United States.

Antimicrobial-lock therapy is an economically viable strategy to prevent/reduce the catheter-related bloodstream infections (CRBSI) that are associated with central venous catheters (CVCs). Herein, we report the synthesis and characterization of the -nitroso--acetyl-l-cysteine ethyl ester (SNACET), a nitric oxide (NO)-releasing molecule, and for the first time its application as a catheter lock solution to combat issues of bacterial infection associated with indwelling catheters. Nitric oxide is an endogenous gasotransmitter that exhibits a wide range of biological properties, including broad-spectrum antimicrobial activity. Read More

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The crystal structures of three disordered 2-substituted benzimidazole esters.

Acta Crystallogr E Crystallogr Commun 2021 May 9;77(Pt 5):473-479. Epub 2021 Apr 9.

School of Chemistry, University of St Andrews, St Andrews, Fife KY16 9ST, UK.

The crystal structures of three benzimidazole esters containing aryl or heterocyclic substituents at position 2 are reported, and all three exhibit disorder of mol-ecular entities. In ethyl 1-methyl-2-[4-(prop-2-yn-oxy)phen-yl]-1-benzimidazole-5-carboxyl-ate, CHNO, (I), the prop-2-yn-1-oxyphenyl unit is disordered over two sets of atomic sites having effectively equal occupancies, 0.506 (5) and 0. Read More

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Characteristic fingerprints and volatile flavor compound variations in Liuyang Douchi during fermentation via HS-GC-IMS and HS-SPME-GC-MS.

Food Chem 2021 May 13;361:130055. Epub 2021 May 13.

College of Food Science and Technology, Hunan Agricultural University, Changsha 410128, China. Electronic address:

The present study investigates volatile organic compound (VOC) compositional changes in Liuyang Douchi during fermentation via a HS-GC-IMS and HS-SPME-GC-MS combination approach. A total of 115 VOCs were identified from Douchi, most of which were accumulated during pile fermentation. Notably, most alcohols and acids decreased with fermentation, while esters, ketones, pyrazines, and phenols accumulated during pile fermentation. Read More

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FOXG1 promotes aging inner ear hair cell survival through activation of the autophagy pathway.

Autophagy 2021 May 19:1-22. Epub 2021 May 19.

Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.

Presbycusis is the cumulative effect of aging on hearing. Recent studies have shown that common mitochondrial gene deletions are closely related to deafness caused by degenerative changes in the auditory system, and some of these nuclear factors are proposed to participate in the regulation of mitochondrial function. However, the detailed mechanisms involved in age-related degeneration of the auditory systems have not yet been fully elucidated. Read More

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The effects of glutathione ethyl ester in in vitro maturation on the developmental ability of oocytes derived from cattle with liver abnormalities.

Theriogenology 2021 Aug 6;170:85-90. Epub 2021 May 6.

University Farm, Faculty of Agriculture, Utsunomiya University, Tochigi, 321-4415, Japan; Department of Animal Production Science, United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan. Electronic address:

The main objectives of this study was to identify the effects of a relationship of hyper-concentration of Gamma-glutamyltransferase (γ-GTP) in follicle fluid (FF) on the levels of glutathione (GSH)/reactive oxygen species (ROS) in oocytes and subsequent embryo development in cattle with abnormal livers. Furthermore, we investigated the effect of supplementing in vitro maturation medium with glutathione ethyl ester (GSH-OEt) on the subsequent developmental potential of oocytes from such cattle. We used a control group of cattle (with normal livers) and a liver disorder (LD) group, in which the liver was diagnosed as being abnormal. Read More

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Chemical fuel-driven transient polymeric micelle nanoreactors toward reversible trapping and reaction acceleration.

Chem Commun (Camb) 2021 Jun 17;57(47):5786-5789. Epub 2021 May 17.

Institute of Fundamental and Frontier Sciences (IFFS), University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China.

In most synthetic nanoreactor systems, catalysed products do not promptly diffuse away from the nanoreactor, which leads to lower than expected catalytic efficiencies. To address the diffusion problem, transient polymer micelle nanoreactor systems were achieved using 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) as the fuel and activated esters as the energy dissipating units. These demonstrated pathway-dependent catalytic properties for transient micelles: product inhibition was observed or efficiently eliminated depending on EDC reloading in the metastable stage or after full dissipation for transient micelles. Read More

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Predominance of indigenous non-Saccharomyces yeasts in the traditional fermentation of greengage wine and their significant contribution to the evolution of terpenes and ethyl esters.

Food Res Int 2021 May 9;143:110253. Epub 2021 Mar 9.

College of Food Science & Nutritional Engineering, China Agricultural University, No. 17 Tsinghua Dong Road, 100083 Beijing, PR China. Electronic address:

Greengage wine is a popular drink in Southeast Asia. Salt maceration and sugar addition in traditional fermentation caused plasmolysis of greengage skin cell. In this case, the development of indigenous microbiota can use the nutrition of exosmosis of cell tissue fluid. Read More

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Evolution of volatile profile and aroma potential of table grape Hutai-8 during berry ripening.

Food Res Int 2021 May 22;143:110330. Epub 2021 Mar 22.

College of Enology, Northwest A&F University, Yangling, Shaanxi 712100, China; Heyang Experimental and Demonstrational Stations for Grape, Northwest A&F University, Heyang, Shaanxi 715300, China. Electronic address:

Hutai-8 (Vitis vinifera × Vitis labrusca) is a table grape widely cultivated in China. In order to determine the changes in volatile profile and aroma potential during berry ripening, a total of 84 free and 73 bound aroma compounds were identified and quantified using headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry (HS-SPME-GC-MS). Aldehydes and esters were found to be the main volatile compounds in Hutai-8. Read More

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Fabrication, characterization and properties of DHA-loaded nanoparticles based on zein and PLGA.

Food Chem 2021 Apr 28;360:129957. Epub 2021 Apr 28.

College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.

This study focused on the feasibility of delivering docosahexaenoic acid (DHA) via zein/ Poly(lactic-co-glycolic) acid stabilized nanoparticles (ZPDNPs). ZPDNPs with good encapsulation efficiency, water solubility, and chemical instability were prepared by the antisolvent precipitation method. The structure and interaction force of ZPDNPs was evaluated using transmission electron microscopy, circular dichroism, X-ray powder diffraction, and FTIR. Read More

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