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Journal articles on the topic 'Oak lactones'

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Published: 4 June 2021
Last updated: 1 February 2022

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1

Maga, Joseph A. "Oak lactones in alcoholic beverages." Food Reviews International 12, no. 1 (February 1996): 105–30. http://dx.doi.org/10.1080/87559129609541069.

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2

Stegăruș, Diana Ionela, Anamaria Călugăr, Corneliu Tanase, Adriana Muscă, Oana Romina Botoran, Mihail Manolache, Anca Cristina Babeș, et al. "Influence of Oak Chips and Oak Barrel Ageing on Volatile Profile in Chardonnay Wine of Romania." Applied Sciences 11, no. 8 (April 19, 2021): 3691. http://dx.doi.org/10.3390/app11083691.

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The influence of the addition of oak chips and barrel ageing on basic wine parameters and volatile compounds of Chardonnay wines has been studied. Chardonnay wines were obtained by the traditional wine-making process. Oak chips (4 g/L—non-toasted and light toasted) were added at the final stage of the winemaking process for ageing 1, 2 and 3 months, respectively. Also, the control wine was aged in non-toasted barrels for the same period of time. Following Liquid-liquid extraction-gas chromatography-mass spectrometry analysis, alcohols, esters, fatty acids, lactones, and phenolic compounds were identified and quantified. The light toasted wine was clearly separated by phenolic compounds (vanillin, p-vinyl guaiacol and acetovanillone). The floral aroma supplied by 2-phenylethanol was slowly increased by ageing with odor activity values (OAV) higher in aged samples than control wine (1.07). The vanilla scent could be easily perceived in all aged samples, mainly for light toasted chip-treated samples with OAV values between 2.30 and 2.37. After 3 months, the volatile compounds of wine from non-toasted medium (chips and barrels) were almost similar from the volatile profile point of view. This could have economic and vinification management implications since oak barrels are expensive and the wine oak barrel aging is a long process. All wines studied in this research can provide a viable alternative to young varietal wines.
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3

Pollnitz, Alan P., Graham P. Jones, and Mark A. Sefton. "Determination of oak lactones in barrel-aged wines and in oak extracts by stable isotope dilution analysis." Journal of Chromatography A 857, no. 1-2 (October 1999): 239–46. http://dx.doi.org/10.1016/s0021-9673(99)00785-2.

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4

Călugăr, Anamaria, Teodora Emilia Coldea, Carmen Rodica Pop, Tiberia Ioana Pop, Anca Cristina Babeș, Claudiu Ioan Bunea, Mihail Manolache, and Emese Gal. "Evaluation of Volatile Compounds during Ageing with Oak Chips and Oak Barrel of Muscat Ottonel Wine." Processes 8, no. 8 (August 17, 2020): 1000. http://dx.doi.org/10.3390/pr8081000.

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The aim of this work was to compare the variations of alcohols compounds in white wine Muscat Ottonel variety aged in the presence of untoasted oak chips, toasted oak chips and untoasted barrel, considering three ageing periods—30, 60, and 90 days. The liquid-liquid extraction and gas chromatography coupled to mass spectrometry were used to compare the concentrations of the volatile constituents of Muscat Ottonel wines. A total of 51 volatile compounds were quantified. Alcohols, terpenic and carboxylic acids decreased with ageing time, whereas esters, lactones, and phenolic compounds increased due esterification processes. The chips toast level, method, and duration of ageing, significantly influenced the content of aromatic compounds. Partial least squares regression (PLS-R) clearly discriminated the initial wine and also the wines aged with toasted and untoasted medium. The compounds (alcohols and terpenes) that impart distinctive aroma of Muscat Ottonel were enhanced by untoasted medium. Light toasted oak chips enhanced wood volatile components (acetovanillone and p-vinyl guaiacol). This study provides important scientific results on the ageing of Muscat Ottonel wines with practical economic benefits to winemakers. Alternative less expensive ageing methods and improved control on the wood components extraction process, may contribute to obtaining high-quality wines.
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5

Marino, J. P., and Roberto Fernández de la Pradilla. "Stereospecific synthesis of γ-butyrolactones from acyclic vinyl sulfoxides: an asymmetric synthesis of optically pure oak lactones." Tetrahedron Letters 26, no. 44 (January 1985): 5381–84. http://dx.doi.org/10.1016/s0040-4039(00)98213-3.

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6

Pino, Jorge A., and Elda Roncal. "Validation of a HS-SPME-GC Method for Determining Higher Fatty Esters and Oak Lactones in White Rums." Food Analytical Methods 9, no. 7 (December 3, 2015): 1958–62. http://dx.doi.org/10.1007/s12161-015-0368-3.

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7

Mosedale, J. "Variation of heartwood phenolics and oak lactones between the species and phenological types of Quercus petraea and Q. robur." Forestry 69, no. 1 (January 1, 1996): 47–56. http://dx.doi.org/10.1093/forestry/69.1.47.

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8

Perestrelo, Rosa, Catarina Silva, and José S. Câmara. "Madeira Wine Volatile Profile. A Platform to Establish Madeira Wine Aroma Descriptors." Molecules 24, no. 17 (August 21, 2019): 3028. http://dx.doi.org/10.3390/molecules24173028.

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In the present study we aimed to investigate the volatile organic compounds (VOCs) that may potentially be responsible for specific descriptors of Madeira wine providing details about Madeira wine aroma notes at molecular level. Moreover, the wine aroma profile, based on the obtained data, will be a starting point to evaluate the impact of grape variety (Malvasia, Bual, Sercial, Verdelho and Tinta Negra), type (sweet, medium sweet, dry and medium dry), and age (from 3 to 20 years old) on Madeira wine sensorial properties. Firstly, a comprehensive and in-depth Madeira wine volatile profiling was carried out using headspace solid-phase microextraction combined with gas chromatography-mass spectrometry (HS–SPME/GC–qMS). Secondly, a relation among the varietal, fermentative and aging aroma compounds, and their aroma descriptors with the Madeira wine sensorial properties was assessed. A total of 82 VOCs, belonging to different chemical families were identified, namely 21 esters, 13 higher alcohols, ten terpenic compounds, nine fatty acids, seven furanic compounds, seven norisoprenoids, six lactones, four acetals, four volatile phenols and one sulphur compound. From a sensorial point of view, during the aging process the wine lost its freshness and fruitiness odor related to the presence of some varietal and fermentative compounds, whereas other descriptors such as caramel, dried fruits, spicy, toasty and woody, arose during ageing. The Maillard reaction and diffusion from the oak were the most important pathways related with these descriptors. A relationship-based approach was used to explore the impact of grape variety, wine type, and age on Madeira wine sensorial properties based on shared number of VOCs and their odors.
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9

Ghosh, Manju, Sritama Bose, and Subrata Ghosh. "A simple route to the syntheses of both enantiomers of trans-oak lactone and (+)-cis-oak lactone." Tetrahedron Letters 49, no. 37 (September 2008): 5424–26. http://dx.doi.org/10.1016/j.tetlet.2008.07.026.

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10

Dumitriu (Gabur), Georgiana-Diana, Carmen Teodosiu, Iulian Gabur, Valeriu V. Cotea, Rafael A. Peinado, and Nieves López de Lerma. "Evaluation of Aroma Compounds in the Process of Wine Ageing with Oak Chips." Foods 8, no. 12 (December 10, 2019): 662. http://dx.doi.org/10.3390/foods8120662.

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Many modern alcoholic beverages are subjected to ageing processes during which compounds extracted from wood contribute decisively to the overall beverage character. Wines represent a perfect example of beverage in which ageing is a crucial technological manufacturing step. During winemaking, producers accelerate chemical changes in wine composition by traditional and alternative methods, such as the use of oak wood barrels and/or oak wood chips. Our research aimed to investigate the overall volatile composition and sensory quality of red wines aged for two timeframes, namely, 1.5 and 3 months, and with two technological variants, i.e., American and French oak wood chips. Red grapes from the Fetească neagră (Vitis vinifera) variety were harvested from a vineyard in the North-East region of Romania. Stir bar sorptive extraction and gas chromatography coupled with mass spectrometry (SBSE–GC–MS) was used to extract minor aromas present in wine samples. The results showed clear differences between wines treated with American and French oak chips. Furthermore, ageing for 3 months increased the concentration of cis-whiskey lactone and guaiacol in American oak-treated wine samples. For wines aged with French oak chips, we observed higher concentrations of furfural, 5-methylfurfural, 4-vinylguaiacol, and trans-whiskey lactone. The increased presence of chemical compounds in wine aged with French oak chips generated prominent smoky, licorice, and toasty aromas, whereas in wines aged with American oak chips, notes of vanilla, toasty, and cacao aromas were noticed. Moreover, red wines aged with American and French oak chips were discriminated by chemometric analysis, which confirmed the evolution of aroma compounds.
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11

Villecco, Margarita B., Julieta V. Catalán, Marta I. Vega, Francisco M. Garibotto, Ricardo D. Enriz, and César A. N. Catalán. "Synthesis and Antibacterial Activity of Highly Oxygenated 1,8-Cineole Derivatives." Natural Product Communications 3, no. 3 (March 2008): 1934578X0800300. http://dx.doi.org/10.1177/1934578x0800300301.

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Seventeen mono-, di- and trifunctionalized 1,8-cineole derivatives carrying OH, OAc, keto and lactone functions at C-5, C-8 and C-9 were synthesized from 1,8-cineole with fair to excellent yields. The antibacterial activity of these synthetic compounds against Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa and Staphylococcus aureus using the agar dilution method was examined. Lactones 1,3-dimethyl-2-oxabicyclo[2.2.2]octan-8- endo-acetyloxy-5→9-olide (15) and 1,3-dimethyl-2-oxabicyclo[2.2.2]octan-8- endo-ol-5→9-olide (16) showed the highest antibacterial activity against all the three Gram negative bacteria assayed. A structure-activity relationship (SAR) study on the oxygenated 1,8-cineole derivatives has allowed a model to be proposed for the recognition of the minimal structural requirements for the antimicrobial effect.
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12

Lamarque, Laurent, Alain Méou, and Pierre Brun. "Mn(OAc)3-promoted hydroxylation of α-carbomethoxy-γ-lactones by molecular oxygen." Canadian Journal of Chemistry 78, no. 1 (January 15, 2000): 128–32. http://dx.doi.org/10.1139/v99-227.

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The Mn(OAc)3-mediated hydroxylation of a series of α-carbomethoxy-γ-lactones by molecular oxygen is described. The reaction is regio- and stereoselective and gives α-carbomethoxy-α-hydroxy-γ-lactones. Key words: manganese acetate, γ-lactones, hydroxylation, molecular oxygen.
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13

Waterhouse, Andrew L., and John P. Towey. "Oak Lactone Isomer Ratio Distinguishes between Wine Fermented in American and French Oak Barrels." Journal of Agricultural and Food Chemistry 42, no. 9 (September 1994): 1971–74. http://dx.doi.org/10.1021/jf00045a026.

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14

Martínez, Rosa M., Carmen Barba, Guillermo Santa-María, and Marta Herraiz. "Stereodifferentiation of oak lactone by using multidimensional chromatographic techniques." Analytical Methods 8, no. 7 (2016): 1505–12. http://dx.doi.org/10.1039/c5ay02404h.

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This work reports for the first time the use of on-line coupling of reversed phase liquid chromatography with gas chromatography for the stereodifferentiation of oak lactone, which is considered to be one of the main constituents of the aroma of different products.
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15

Hidayet, Hoger M., and Kamal N. Mustafa. "EFFECT OF FEEDING OAK (Quercus aegilops) ACORNS ON MILK PRODUCTION, MILK COMPOSITION AND SOME BLOOD BIOCHEMICAL PARAMETERS OF BLACK GOATS." IRAQI JOURNAL OF AGRICULTURAL SCIENCES 52, no. 1 (February 24, 2021): 28–35. http://dx.doi.org/10.36103/ijas.v52i1.1233.

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Twenty four Black goat does at 1st week post kidding were adapted to control diet for 2 weeks and then blocked into 4 groups (6 does/group) to be fed on one of the experimental diets (0, 5, 10 and 15% oak acorns) to study the effect of different levels of oak acorns on milk yield, milk composition and some serum biochemical traits. Results revealed that at 10th week of lactation, there was a significant increase in daily milk yield in does fed on 15% oak acorns. In contrast the group fed on 15% oak acorns exhibited a significant decrease in milk protein and solid non-fat contents at 10th week of lactation. The milk lactose yield was significantly higher in group fed on 15% oak acorns at 10th week of lactation. The serum glucose concentration at 8th week of lactation was significantly higher in does fed on 10% oak acorns while at 10th week; it was significantly higher in does fed 5% oak acorns. It could be concluded that feeding does on diets containing 15% oak acorns caused a significant increase in daily milk yield of Black goats and a significant decrease in milk protein content.
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16

De Rosso, Mirko, Christine Mayr Marangon, and Riccardo Flamini. "Characterization of ellagitannins and oak lactone precursors in oak wood-aged grappa by high-resolution mass spectrometry." Journal of Mass Spectrometry 55, no. 7 (November 28, 2019): e4472. http://dx.doi.org/10.1002/jms.4472.

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17

Michalczuk, Bartosz, Martin Sabo, Katarína Jatzová, Ladislav Moravský, Martina Gregorová, and Štefan Matejčík. "Fast quantification of whisky lactone in oak wood by ion mobility spectrometer." Talanta 209 (March 2020): 120567. http://dx.doi.org/10.1016/j.talanta.2019.120567.

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18

Hayasaka, Yoji, Kerry L. Wilkinson, Gordon M. Elsey, Michael Raunkjær, and Mark A. Sefton. "Identification of Natural Oak Lactone Precursors in Extracts of American and French Oak Woods by Liquid Chromatography–Tandem Mass Spectrometry." Journal of Agricultural and Food Chemistry 55, no. 22 (October 2007): 9195–201. http://dx.doi.org/10.1021/jf072171u.

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19

Wilkinson, Kerry L., Andrei Prida, and Yoji Hayasaka. "Role of Glycoconjugates of 3-Methyl-4-hydroxyoctanoic Acid in the Evolution of Oak Lactone in Wine during Oak Maturation." Journal of Agricultural and Food Chemistry 61, no. 18 (April 24, 2013): 4411–16. http://dx.doi.org/10.1021/jf400175h.

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20

Wilkinson, Kerry L., Gordon M. Elsey, Rolf H. Prager, Alan P. Pollnitz, and Mark A. Sefton. "Rates of Formation ofcis- andtrans-Oak Lactone from 3-Methyl-4-hydroxyoctanoic Acid." Journal of Agricultural and Food Chemistry 52, no. 13 (June 2004): 4213–18. http://dx.doi.org/10.1021/jf0496550.

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21

Chattopadhyay, Angshuman, Dibakar Goswami, and Bhaskar Dhotare. "Crotylation of (R)-2,3-O-cyclohexylideneglyceraldehyde: a simple synthesis of (+)-trans-oak lactone." Tetrahedron Letters 51, no. 30 (July 2010): 3893–96. http://dx.doi.org/10.1016/j.tetlet.2010.05.070.

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22

Bai, Meng, Guo-Lei Huang, Rong-Qing Mei, Bin Wang, You-Ping Luo, Xu-Hua Nong, Guang-Ying Chen, and Cai-Juan Zheng. "Bioactive Lactones from the Mangrove-Derived Fungus Penicillium sp. TGM112." Marine Drugs 17, no. 8 (July 24, 2019): 433. http://dx.doi.org/10.3390/md17080433.

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Three new lactones penicilactones A−C (1−3) were obtained from the mangrove-derived fungus Penicillium sp. TGM112. Their structures and absolute configurations were determined by detailed NMR, MS spectroscopic data, Mo2(OAc)4-induced electronic circular dichroism (ECD), and circular dichroism (CD) spectroscopy. Compound 1 showed antibacterial activity against Staphylococcus aureus with an MIC value of 6.25 μg/mL. Compound 2 showed insecticidal activity against newly hatched larvae of Culex quinquefasciatus with the LC50 value of 78.5 (±0.58) μg/mL.
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23

Abdelgaleil, Samir A. M., Neama Abdel-Razeek, and Salah A. Soliman. "Herbicidal Activity of Three Sesquiterpene Lactones on Wild Oat (Avena fatua) and Their Possible Mode of Action." Weed Science 57, no. 1 (February 2009): 6–9. http://dx.doi.org/10.1614/ws-08-093.1.

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Inhibitory effects of two sesquiterpene lactones, costunolide and parthenolide, isolated from dichloromethane extract of the stem bark of southern magnolia and a parthenolide derivative, 1,10-epoxyparthenolide, were evaluated on germination and seedling growth of wild oat. The sesquiterpene lactones effected a significant reduction of seed germination, particularly at the highest concentrations of 200, 400, and 600 mg L−1, with costunolide being the most active one. Furthermore, the three sesquiterpenes strongly inhibited root and shoot growth of the weed. However, the inhibition of root growth by all compounds was greater than that of shoot growth. Parthenolide inhibited growth of both root and shoot more strongly than the other compounds and a reference herbicide imazamethabenz. At a concentration of 100 mg L−1, parthenolide caused 87 and 41% growth inhibition of root and shoot, respectively. Parthenolide was tested for its effect on acetolactate synthase (ALS) activity. The compound inhibited the enzyme in a concentration-dependent manner, with 50% inhibition of 51.44 µM. The results of this study indicated that the herbicidal activity of the isolated sesquiterpene may be attributed to inhibition of ALS. The promising phytotoxic activity of sesquitepene lactones reported here could be considered a starting point for developing environmentally safer herbicides.
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24

Fang, Xianhe, Lei Shen, and Xiangdong Hu. "Asymmetric total synthesis of (+)-ovafolinins A and B." Chemical Communications 54, no. 54 (2018): 7539–41. http://dx.doi.org/10.1039/c8cc03456g.

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Benefiting from a highly diastereoselective alkylation of (S)-Taniguchi lactone, a double Friedel–Crafts reaction, a global debenzylation and a Cu(OAc)2-enabled benzylic oxidative cyclization, an efficient synthetic approach to (+)-ovafolinins A and B has been developed.
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25

Breniaux, Marion, Philippe Renault, and Rémy Ghidossi. "Impact of High-Power Ultrasound for Barrel Regeneration on the Extraction of Wood Volatile and Non-Volatile Compounds." Processes 9, no. 6 (May 28, 2021): 959. http://dx.doi.org/10.3390/pr9060959.

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High-power ultrasound (HPU) is an innovative cleaning method used in wineries for oak barrel sanitation and regeneration. The process is associated with hot water (HPUhw) to ensure microbial stabilization and has been proved to be highly effective in recent years. This study thus examines the impact of different cleaning treatments on the subsequent extraction of wood compounds in wine and their impact on organoleptic properties. Red wines aging in barrels treated (HPUhw and steam) in different years (1, 2, and 3 years) were examined during the first 12 months for chemical exchange from wood to wine. Specific analyses were realized on ellagitannins, the physicochemical composition, and oak wood volatile compounds. Only a small increase in some wood volatile compounds occurred in the case of HPUhw, including furfural, 5-methylfurfural, trans-whisky lactone, vanillin, and syringaldehyde. The sensory analysis carried out by a panel of experts showed that the impact on the organoleptic properties of wines is similar with both processes (HPUhw and steam). However, since HPUhw treatment requires lower energy for the same efficiency, it could be an interesting alternative to steam treatment, given the promising prior microbial results.
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26

Raunkjær, Michael, D. Sejer Pedersen, Gordon M. Elsey, Mark A. Sefton, and George K. Skouroumounis. "Precursors to oak lactone: synthesis of gallate ester derivatives of 3-methyl-4-hydroxyoctanoic acid." Tetrahedron Letters 42, no. 49 (December 2001): 8717–19. http://dx.doi.org/10.1016/s0040-4039(01)01890-1.

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27

Imrei, Zoltán, Zsófia Lohonyai, György Csóka, József Muskovits, Szabolcs Szanyi, Gábor Vétek, József Fail, Miklós Tóth, and Michael J. Domingue. "Improving trapping methods for buprestid beetles to enhance monitoring of native and invasive species." Forestry: An International Journal of Forest Research 93, no. 2 (February 12, 2020): 254–64. http://dx.doi.org/10.1093/forestry/cpz071.

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Abstract Most of the current understanding of the orientation and communication of jewel beetles arose from research on the Asian emerald ash borer (EAB), Agrilus planipennis, which has become one of the most destructive invasive forest insect pests in history following its introduction to North America and European Russia. From a European perspective, a number of jewel beetles have a high invasive risk similar to that of the emerald ash borer, including the potential threat of the bronze birch borer Agrilus anxius, the goldspotted oak borer Agrilus auroguttatus, and the twolined chestnut borer Agrilus bilineatus. Native jewel beetles expanding their geographic range include the cypress jewel beetle Ovalisia festiva and the black-banded oak borer Coraebus florentinus. Other native species are increasing in their importance, including the flathead oak borer Coraebus undatus, the two-spotted oak borer Agrilus biguttatus, the flatheaded beech borer Agrilus viridis and Agrilus cuprescens. Commonly used prism and multi-funnel trap designs and other promising experimental trap designs have been tested and compared in the US and in Europe. One factor considered has been colouration, typically purple and green. Another is olfactory attraction, both to plant volatiles and extracts such as (Z)-3-hexenol, Manuka oil, Phoebe oil and Cubeb oil, and also to pheromones such as (Z)-3-lactone, for emerald ash borer. Field observations have been made of mating and host-finding behaviours of oak buprestids based upon visual stimuli in North America and Europe. By using pinned dead EAB models, visual mating approaches have been observed by males of Agrilus biguttatus, Agrilus sulcicollis and Agrilus angustulus, which is a behaviour similar to that previously observed in EAB. Green plastic-covered branch-traps significantly out-performed other trap designs and caught more Agrilus jewel beetles if an artificial visual decoy that copies a beetle body was included. A higher fidelity decoy offered the same distinctive light-scattering pattern as real resting EAB females and elicited the full sequence of stereotypical male mating flight behaviour of EAB and A. biguttatus from up to 1 m away. An optimization of visual, olfactory and other possible stimuli has likely not yet been achieved. More sophisticated trap designs could lead to more sensitive detection capabilities with increased selectivity.
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28

Brown, Rachel C., Dennis K. Taylor, and Gordon M. Elsey. "Utilization of a 1,2-Dioxine for the Synthesis of the Four Possible Stereoisomers of Oak Lactone." Organic Letters 8, no. 3 (February 2006): 463–66. http://dx.doi.org/10.1021/ol052754u.

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29

Lamarque, Laurent, Alain Méou, and Pierre Brun. "Synthesis of bicyclic γ-lactones promoted by Mn(OAc)3: Regio- and diastereoselectivities." Tetrahedron 54, no. 23 (June 1998): 6497–506. http://dx.doi.org/10.1016/s0040-4020(98)00288-9.

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30

Pardo-Garcia, Ana I., Kerry L. Wilkinson, Julie A. Culbert, Natoiya D. R. Lloyd, Gonzalo L. Alonso, and M. Rosario Salinas. "Accumulation of Glycoconjugates of 3-Methyl-4-hydroxyoctanoic Acid in Fruits, Leaves, and Shoots of Vitis vinifera cv. Monastrell following Foliar Applications of Oak Extract or Oak Lactone." Journal of Agricultural and Food Chemistry 63, no. 18 (May 4, 2015): 4533–38. http://dx.doi.org/10.1021/acs.jafc.5b01043.

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31

Liu, Ying, Xiaoqin Chen, Yongxian Cheng, and Guangbiao Zhou. "Small Compound 6-O-Angeloylplenolin Induces Mitotic Arrest and Exhibits Therapeutic Potential In Multiple Myeloma." Blood 116, no. 21 (November 19, 2010): 5043. http://dx.doi.org/10.1182/blood.v116.21.5043.5043.

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Abstract Abstract 5043 Multiple myeloma (MM), the second most frequent hematological malignancy that remains incurable, is a disease of cell cycle dysregulation and loss of apoptotic control. Here we report that 6-O-angeloylplenolin (6-OAP), a sesquiterpene lactone extracted from Centipeda minima L. (Compositae), suppresses the proliferation of drug-sensitive and drug-resistant cell lines and primary CD138+ MM cells, but does not affect normal peripheral blood mononuclear cells. 6-OAP caused mitotic arrest, accompanied by upregulation of cyclin B1 and downregulation of phospharylated Cdc2, indicating activation of cyclin B1/Cdc2 complex which is critical to the control of G2-M transition. We show that 6-OAP activates spindle assembly checkpoint, enhances Mad2/Cdc20 binding activity, leading to inhibition of ubiquitiniation and subsequent proteasomal degradation of cyclin B1. 6-OAP potentiates cytotoxicity of dexamethasone, doxorubicin and bortezomib, and overcomes the protective effects of interleukin-6 and insulin-like growth factor-2 on MM cells. Moreover, 6-OAP inhibits tumor growth but does not affect animal body weight in an in vivo xenograft model for human MM. Taken together, these results indicate that 6-OAP is a new cell cycle inhibitor which shows therapeutic potential for treating MM. Disclosures: No relevant conflicts of interest to declare.
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32

LAMARQUE, L., A. MEOU, and P. BRUN. "ChemInform Abstract: Synthesis of Bicyclic γ-Lactones Promoted by Mn(OAc)3: Regio- and Diastereoselectivities." ChemInform 29, no. 39 (June 19, 2010): no. http://dx.doi.org/10.1002/chin.199839097.

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33

Lamarque, Laurent, Alain Méou, and Pierre Brun. "Mn(OAc)3-promoted hydroxylation of α-carbomethoxy-g-lactones by molecular oxygen." Canadian Journal of Chemistry 78, no. 1 (2000): 128–32. http://dx.doi.org/10.1139/cjc-78-1-128.

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34

Prida, Andrei, Alexis Ducousso, Rémy J. Petit, Gérard Nepveu, and Jean-Louis Puech. "Variation in wood volatile compounds in a mixed oak stand: strong species and spatial differentiation in whisky-lactone content." Annals of Forest Science 64, no. 3 (April 2007): 313–20. http://dx.doi.org/10.1051/forest:2007008.

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35

Pino, Jorge Antonio, and Clara Elizabeth Quijano. "Study of the volatile compounds from plum (Prunus domestica L. cv. Horvin) and estimation of their contribution to the fruit aroma." Food Science and Technology 32, no. 1 (January 31, 2012): 76–83. http://dx.doi.org/10.1590/s0101-20612012005000006.

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Simultaneous Distillation-Extraction (SDE) and headspace-solid phase microextraction (HS-SPME) combined with GC-FID and GC-MS were used to analyze volatile compounds from plum (Prunus domestica L. cv. Horvin) and to estimate the most odor-active compounds by application of the Odor Activity Values (OAV). The analyses led to the identification of 148 components, including 58 esters, 23 terpenoids, 14 aldehydes, 11 alcohols, 10 ketones, 9 alkanes, 7 acids, 4 lactones, 3 phenols, and other 9 compounds of different structures. According to the results of SDE-GC-MS, SPME-GC-MS and OAV, ethyl 2-methylbutanoate, hexyl acetate, (E)-2-nonenal, ethyl butanoate, (E)-2-decenal, ethyl hexanoate, nonanal, decanal, (E)-β-ionone, Γ-dodecalactone, (Z)-3-hexenyl acetate, pentyl acetate, linalool, Γ-decalactone, butyl acetate, limonene, propyl acetate, Δ-decalactone, diethyl sulfide, (E)-2-hexenyl acetate, ethyl heptanoate, (Z)-3-hexenol, (Z)-3-hexenyl hexanoate, eugenol, (E)-2-hexenal, ethyl pentanoate, hexyl 2-methylbutanoate, isopentyl hexanoate, 1-hexanol, Γ-nonalactone, myrcene, octyl acetate, phenylacetaldehyde, 1-butanol, isobutyl acetate, (E)-2-heptenal, octadecanal, and nerol are characteristic odor active compounds in fresh plums since they showed concentrations far above their odor thresholds.
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36

BROWN, RACHEL C., MARK A. SEFTON, DENNIS K. TAYLOR, and GORDON M. ELSEY. "An odour detection threshold determination of all four possible stereoisomers of oak lactone in a white and a red wine." Australian Journal of Grape and Wine Research 12, no. 2 (July 2006): 115–18. http://dx.doi.org/10.1111/j.1755-0238.2006.tb00050.x.

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37

Smani, Tarik, Tina Patel, and Victoria M. Bolotina. "Complex regulation of store-operated Ca2+ entry pathway by PKC-ε in vascular SMCs." American Journal of Physiology-Cell Physiology 294, no. 6 (June 2008): C1499—C1508. http://dx.doi.org/10.1152/ajpcell.00365.2007.

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The role of PKC in the regulation of store-operated Ca2+ entry (SOCE) is rather controversial. Here, we used Ca2+-imaging, biochemical, pharmacological, and molecular techniques to test if Ca2+-independent PLA2β (iPLA2β), one of the transducers of the signal from depleted stores to plasma membrane channels, may be a target for the complex regulation of SOCE by PKC and diacylglycerol (DAG) in rabbit aortic smooth muscle cells (SMCs). We found that the inhibition of PKC with chelerythrine resulted in significant inhibition of thapsigargin (TG)-induced SOCE in proliferating SMCs. Activation of PKC by the diacylglycerol analog 1-oleoyl-2-acetyl- sn-glycerol (OAG) caused a significant depletion of intracellular Ca2+ stores and triggered Ca2+ influx that was similar to TG-induced SOCE. OAG and TG both produced a PKC-dependent activation of iPLA2β and Ca2+ entry that were absent in SMCs in which iPLA2β was inhibited by a specific chiral enantiomer of bromoenol lactone ( S-BEL). Moreover, we found that PKC regulates TG- and OAG-induced Ca2+ entry only in proliferating SMCs, which correlates with the expression of the specific PKC-ε isoform. Molecular downregulation of PKC-ε impaired TG- and OAG-induced Ca2+ influx in proliferating SMCs but had no effect in confluent SMCs. Our results demonstrate that DAG (or OAG) can affect SOCE via multiple mechanisms, which may involve the depletion of Ca2+ stores as well as direct PKC-ε-dependent activation of iPLA2β, resulting in a complex regulation of SOCE in proliferating and confluent SMCs.
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38

Wilkinson, Kerry L., Gordon M. Elsey, Rolf H. Prager, Takashi Tanaka, and Mark A. Sefton. "Precursors to oak lactone. Part 2: Synthesis, separation and cleavage of several β-d-glucopyranosides of 3-methyl-4-hydroxyoctanoic acid." Tetrahedron 60, no. 29 (July 2004): 6091–100. http://dx.doi.org/10.1016/j.tet.2004.05.070.

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39

Fudge, Anthea L., Gordon M. Elsey, Yoji Hayasaka, and Kerry L. Wilkinson. "Quantitative analysis of β-d-glucopyranoside of 3-methyl-4-hydroxyoctanoic acid, a potential precursor to cis-oak lactone, in oak extracts using liquid chromatography–tandem mass spectrometry based stable isotope dilution analysis." Journal of Chromatography A 1215, no. 1-2 (December 2008): 51–56. http://dx.doi.org/10.1016/j.chroma.2008.10.109.

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40

Tolmacheva, Anna A., Eugene A. Rogozhin, and Dmitry G. Deryabin. "Antibacterial and quorum sensing regulatory activities of some traditional Eastern-European medicinal plants." Acta Pharmaceutica 64, no. 2 (June 1, 2014): 173–86. http://dx.doi.org/10.2478/acph-2014-0019.

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Abstract The objective of this study was to screen extracts of twenty Eastern European medicinal plants, using wild-type and reporter Chromobacterium violaceum bioassays, for novel components that target bacterial cells and their quorum sensing (QS) communication systems. Three types of activity and their combinations were revealed: (i) direct antimicrobial growth-inhibitory activity, (ii) non-specific and specific pro-QS activities, (iii) anti-QS activity. Among seven plant extracts showing direct growth-inhibitory activity, the strongest effect was shown by Arctostaphylos uva- -ursi (bearberry) leaves. Many plants stimulated violacein production by wild-type C. violaceum ATCC 31532 in a non-specific manner, and only the herb Bidens tripartita (three-lobe beggarticks) contained compounds that mimic acyl-homoserine lactone and operated as a QS agonist. Anti-QS activity was found in eleven plants including Quercus robur (oak) cortex, Betula verrucosa (birch) buds and Eucalyptus viminalis (Manna Gum) leaves. Subsequent statistical analysis showed differences between antimicrobial and anti-QS activities, whereas both activities were defined by phylogenetic position of medical resource plant. Finally, extract from Quercus robur cortex revealed at least two fractions, showing different anti-QS mechanisms. These data confirm that multicomponent anti-infectious mechanisms are used by plants, which may be useful for drug development
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41

Maeda, Hajime, Narumi Kakoki, Mami Ayabe, Yuki Koga, Tomoko Oribe, Yosuke Matsuo, Takashi Tanaka, and Isao Kouno. "ent-Eudesmane sesquiterpenoids, galloyl esters of the oak lactone precursor, and a 3-O-methylellagic acid glycoside from the wood of Platycarya strobilacea." Phytochemistry 72, no. 8 (June 2011): 796–803. http://dx.doi.org/10.1016/j.phytochem.2011.02.020.

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42

Reeves, D. Wayne, Andrew J. Price, and Michael G. Patterson. "Evaluation of Three Winter Cereals for Weed Control in Conservation-Tillage Nontransgenic Cotton." Weed Technology 19, no. 3 (September 2005): 731–36. http://dx.doi.org/10.1614/wt-04-245r1.1.

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The increased use of conservation tillage in cotton production requires that information be developed on the role of cover crops in weed control. Field experiments were conducted from fall 1994 through fall 1997 in Alabama to evaluate three winter cereal cover crops in a high-residue, conservation-tillage, nontransgenic cotton production system. Black oat, rye, and wheat were evaluated for their weed-suppressive characteristics compared to a winter fallow system. Three herbicide systems were used: no herbicide, preemergence (PRE) herbicides alone, and PRE plus postemergence (POST) herbicides. The PRE system consisted of pendimethalin at 1.12 kg ai/ha plus fluometuron at 1.7 kg ai/ha. The PRE plus POST system contained an additional application of fluometuron at 1.12 kg/ha plus DSMA at 1.7 kg ai/ha early POST directed (PDS) and lactofen at 0.2 kg ai/ha plus cyanazine at 0.84 kg ai/ha late PDS. No cover crop was effective in controlling weeds without a herbicide. However, when black oat or rye was used with PRE herbicides, weed control was similar to the PRE plus POST system. Rye and black oat provided more effective weed control than wheat in conservation-tillage cotton. The winter fallow, PRE plus POST input system yielded significantly less cotton in 2 of 3 yr compared to systems that included a winter cover crop. Use of black oat or rye cover crops has the potential to increase cotton productivity and reduce herbicide inputs for nontransgenic cotton grown in the Southeast.
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43

Naranjo, Ana, Leticia Martínez-Lapuente, Belén Ayestarán, Zenaida Guadalupe, Irene Pérez, Clara Canals, and Elena Adell. "Aromatic and Sensory Characterization of Maturana Blanca Wines Made with Different Technologies." Beverages 7, no. 1 (February 2, 2021): 10. http://dx.doi.org/10.3390/beverages7010010.

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Vitis vinífera L. cv. Maturana Blanca is an autochthonous minor variety recently recovered in the Rioja Qualified Denomination of Origin (D.O.Ca Rioja, Spain) for the production of monovarietal white wines with singular and differentiated characteristics. In this paper, Maturana Blanca wines made with different technologies were analyzed by sensory analysis and aromatic profile by gas chromatography-mass detector. Maturana Blanca wines were characterized by low pH, high acidity, and yellowish tonalities. The compounds that most influenced the aroma of Maturana Blanca wines were those related to fruity (acetates and ethyl esters), floral aromas (2-phenylethanol), and spicy notes (γ-decalactone). These wines were mainly characterized by volatile compounds of fruity aromas of banana and apple. The use of pre-fermentative maceration increased the concentration of ethyl esters and acetates and produced wines with higher odor activity values, indicating a greater aromatic intensity. The aromatic profile of Maturana Blanca wines fermented in oak barrels showed a greater complexity as they were also characterized by the presence of important amounts of furfural, whiskey lactone, and eugenol. The sensory analysis confirmed the results obtained in the aromatic analysis, and described the wines as fresh and balanced in mouth, with notes of acidity and medium to high persistence. These results will contribute to a better knowledge of this white variety.
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Oster, Ulrike, Inge Bios, and Wolfhart Rüdiger. "Natural Inhibitors of Germination and Growth IV Compounds from Fruit and Seeds of Mountain Ash (Sorbus aucuparia)." Zeitschrift für Naturforschung C 42, no. 11-12 (December 1, 1987): 1179–84. http://dx.doi.org/10.1515/znc-1987-11-1207.

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Extracts from ripe fruit and seeds of Sorbus aucuparia inhibit germination of other seeds, tested with Amaranthus caudatus and Lepidium sativum. The main compound of the “neutral fraction” of fruit extracts is the lactone compound parasorbic acid (4 -7 mg/g fresh weight) which inhibits germination at concentrations ≧ 5 × 10-4 ᴍ. The “acid fraction” contains abscisic acid (1.3-2.5 µg/g fresh weight) and isopropylmalic acid (1.0-1.5 µg/g fresh weight) as germination inhibitors. Whereas abscisic acid inhibits germination of L. sativum at concentration ≧ 5 × 10-7 ᴍ, germination of A. caudatus is inhibited only at concentrations ≧ 10-5 ᴍ. This is probably due to differences in uptake of the acid because abscisic acid methylester inhibits germination of both species at concentrations ≧ 5 × 10-7 ᴍ. Isopropylmalic acid belongs to a structural type of germination inhibitors which had already been detected in oat extracts.
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45

Lam, Ka-Lung, Wai-Yin Cheng, Fan Yang, Shaoling Lin, Lijun You, Jiachi Chiou, Hoi-Shan Kwan, and Peter Chi-Keung Cheung. "Framework as a Service, FaaS: Personalized Prebiotic Development for Infants with the Elements of Time and Parametric Modelling of In Vitro Fermentation." Microorganisms 8, no. 5 (April 25, 2020): 623. http://dx.doi.org/10.3390/microorganisms8050623.

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We proposed a framework with parametric modeling to obtain biological relevant parameters from the total probiotic growth pattern and metabolite production curves. The lag phase, maximum increase rate, and maximum capacity were obtained via a 205-h exploratory In vitro fermentation of a library of 13 structural-characterized prebiotic candidates against an exclusively breastfed infant fecal inoculum. We also conducted 16S rRNA amplicon sequencing of the infant fecal inoculum. Moreover, we introduce a robust composite metabolite-based indicator that reflects the eubiosis/dysbiosis of microbiota to complement the conventional microbial markers. In terms of short-chain fatty acid, we discovered that polymeric beta-glucans from barley demonstrated potential as prebiotic candidates, while alpha-glucans as glycogen showed the least dissolved ammonia production. In terms of total probiotic, beta-glucans from oat and mushroom sclerotia of Pleurotus tuber-regium showed comparable sustainability when compared to alpha-glucans after 48 h. Being classical prebiotic, galacto-oligosaccharides gave the second-highest metabolite-based indicator, followed by lactose. While limited improvement could be made to lactose and oligosaccharides, polymeric beta-glucans from barley avails more capacity for novel prebiotic development, such as structural modification. We anticipate that more similar parallel screening with the element of time and parametric modeling will provide more novel insights.
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46

Yadav, Dev Kumar, Veerakyathappa H.C, Prakash Eknath Patki, and Gopal Kumar Sharma. "Optimisation of Processing Parameters for the Preparation of Vegetable Curd from Decorticated Sesame Seeds (Sesamum indicum)." Defence Life Science Journal 5, no. 1 (February 19, 2020): 38–44. http://dx.doi.org/10.14429/dlsj.5.14415.

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Current study aims to develop and optimise the processing parameters for the preparation of imitated curd by using vegetable milk extracted from decorticated sesame seeds (Sesamum indicum). Experiments were planned to optimise curdling process for sesame milk with respect to inoculum (1-5%), lactose (1-5%), added proteins (1-3%). It was established that total solid content in a range of 9-10%, dispersion stability with 30-45% scored well (7.8±0.2) on preferential sensory test i.e. nine-point hedonic scale. Sesame milk supplemented with 5% lactose, 1% electrolyte salt mix, 1% sucrose was subjected to fermentation (10±1.0) hrs at 35±2°C) with 5% inoculum (lactic acid bacteria culture) resulted into a vegetable curd with desired consistency (855.6±47.5 g.sec), acidity (0.57±0.02% lactic acid equivalent; LAE), flavor and overall acceptability (OAA). The Solid Not Fat (SNF) content of optimised vegetable curd was found to be 22.20±0.40%, with protein, fat and ash content as 6.70±0.06%, 6.91±0.06% and 0.92±0.01% respectively. The characteristics of vegetable milk (non-dairy) and toned milk (dairy) were well comparable on various aesthetic parameters (fluidity, color, flavor and taste). Proportional characterisation of vegetable (non-dairy) curd with dairy curd relating to its nutritional profile, color analysis, textural and rheological parameters established its similarity. Such dairy analogues may be considered as substitute to various dairy products where milk-based products are scanty or non-available.
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47

Zhang, Xingwang, Ping-Lin Li, Guo-Fei Qin, Shengying Li, Nicole de Voogd, Xu-Li Tang, and Guo-Qiang Li. "Isolation and Absolute Configurations of Diversiform C17, C21 and C25 Terpenoids from the Marine Sponge Cacospongia sp." Marine Drugs 17, no. 1 (December 28, 2018): 14. http://dx.doi.org/10.3390/md17010014.

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Chemical investigation of MeOH extract of a South China Sea sponge Cacospongia sp. yielded 15 terpenoids belonging to three different skeleton-types, including the unusual C17 γ-lactone norditerpenoids (1–3), the rare C21 pyridine meroterpenoid (7), and the notable C25 manoalide-type sesterterpenoids (4–6, 8–10). Compounds 1–5 were initially obtained as enantiomers, and were further separated to be optically pure compounds (1a, 1b, 2a, 2b, 3a-r, 3b-r, 4a, 4b, 5a and 5b) by chiral HPLC, with a LiAlH4 reduction aid for 3. Compounds 3a/3b (a pair of inseparable enantiomers), 4a, 5a, 6, and 7 were identified as new compounds, while 1a/1b and 2a/2b were obtained from a natural source and were determined for their absolute configurations for the first time. This is also the first time to encounter enantiomers of the well-known manoalide-type sesterterpenoids from nature. The structures with absolute configurations of the new compounds were unambiguously determined by comprehensive methods including HR-ESI-MS and NMR data analysis, optical rotation comparison, experimental and calculated electronic circular dichroism (ECD), and Mo2(OAc)4 induced circular dichroism (ICD) methods. The cytotoxicity of the isolates against selected human tumor cell lines was evaluated, however, the tested compounds showed no activity against selected cell lines.
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48

Li, Xin-Liang, Christopher D. Skory, Michael A. Cotta, Vladimir Puchart, and Peter Biely. "Novel Family of Carbohydrate Esterases, Based on Identification of the Hypocrea jecorina Acetyl Esterase Gene." Applied and Environmental Microbiology 74, no. 24 (October 31, 2008): 7482–89. http://dx.doi.org/10.1128/aem.00807-08.

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ABSTRACT Plant cell walls have been shown to contain acetyl groups in hemicelluloses and pectin. The gene aes1, encoding the acetyl esterase (Aes1) of Hypocrea jecorina, was identified by amino-terminal sequencing, peptide mass spectrometry, and genomic sequence analyses. The coded polypeptide had 348 amino acid residues with the first 19 serving as a secretion signal peptide. The calculated molecular mass and isoelectric point of the secreted enzyme were 37,088 Da and pH 5.89, respectively. No significant homology was found between the predicated Aes1 and carbohydrate esterases of known families, but putative aes1 orthologs were found in genomes of many fungi and bacteria that produce cell wall-degrading enzymes. The aes1 transcript levels were high when the fungal cells were induced with sophorose, cellulose, oat spelt xylan, lactose, and arabinose. The recombinant Aes1 produced by H. jecorina transformed with aes1 under the cellobiohydrolase I promoter displayed properties similar to those reported for the native enzyme. The enzyme hydrolyzed acetate ester bond specifically. Using 4-nitrophenyl acetate as substrate, the activity of the recombinant enzyme was enhanced by d-xylose, d-glucose, cellobiose, d-galactose, and xylooligosaccharides but not by arabinose, mannose, or lactose. With the use of 4-nitrophenyl-β-d-xylopyranoside monoacetate as substrate in a β-xylosidase-coupled assay, Aes1 hydrolyzed positions 3 and 4 with the same efficiency while the H. jecorina acetylxylan esterase 1 exclusively deacetylated the position 2 acetyl group. Aes1 was capable of transacetylating methylxyloside in aqueous solution. The data presented demonstrate that Aes1 and other homologous microbial proteins may represent a new family of esterases for lignocellulose biodegradation.
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Torii, Marcelo Shizuo, Júlio César Damasceno, Luciano da Rocha Ribeiro, Eduardo Shiguero Sakaguti, Geraldo Tadeu dos Santos, Makoto Matsushita, and Nelson Massaru Fukumoto. "Physical-chemical characteristics and fatty acids composition in dairy goat milk in response to roughage diet." Brazilian Archives of Biology and Technology 47, no. 6 (November 2004): 903–9. http://dx.doi.org/10.1590/s1516-89132004000600010.

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The objective of the present work was to evaluate the physical-chemical characteristics (density, pH, acidity, fat, protein, lactose and total of solids contents) and milk fatty acids composition (C: 4 to C: 20) in response to roughage sources (alfalfa hay T1; oat hay T2 and maize silage T3). Nine Saanen lactating goats were used, in a triple Youden square design (3 animals x 2 periods). There was no treatment effects in the physical-chemical variables in the univariate analyses; by multivariate analyses three distinct patterns of fatty acids could be defined: milk with greater quantity of short chain fatty acids and acids C17:1omega7 e C18:2omega6 (T1); milk with equivalent amounts of short, medium and long chain fatty acids (T2); and milk with greater amounts of acids C16:1omega7, C17:0, C18:1omega9 and C20:0 (T3). These results indicated that the roughage sources used in the diet of lactating dairy goats affected the fatty acids composition, without altering the milk physical-chemical characteristics. The acids more sensitive to the treatment effects were: C10:0, C12:0, C14:0, C16:0, C16:1omega7, C18:0 and C18:3omega6.
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50

Aljewicz, Marek, Małgorzata Majcher, and Beata Nalepa. "A Comprehensive Study of the Impacts of Oat β-Glucan and Bacterial Curdlan on the Activity of Commercial Starter Culture in Yogurt." Molecules 25, no. 22 (November 19, 2020): 5411. http://dx.doi.org/10.3390/molecules25225411.

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This study provides important information about the impacts of various levels of oat (OBG) and bacterial (curdlan) β-glucan and fat contents in milk on survivability and metabolism of yogurt starter cultures. The results show that addition of β-glucans in the concentration higher than 0.25% reduced starter bacterial counts during storage and prolonged the milk acidification process. A significant increase in lactose consumption by starter cultures was noted in the yogurt samples with OBG addition up to 0.75%. The highest (by 567% on average) increase in lactic acid content was noted in the control yogurts. Whereas the lowest (by 351%) increase in lactic acid content was noted in yogurts with OBG. After 28-day storage, the acetic aldehyde content was significantly influenced by fat content, type and addition level of polysaccharide. A higher increase in acetoin content was noted in samples with 0.25% than in samples with 1% of polysaccharides. In turn, significantly lower increases in diacetyl and 2,3-pentanedione contents were observed in the yogurt samples with OBG than in these with curdlan, with diacetyl production increase along with the higher concentration of the polysaccharide. The addition of OBG and curdlan to milk contributed to differences in the starter culture metabolism, consequently, in the milk acidification dynamics.
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