Journal articles: 'Phenylacetaldehyd'

1

Hertenstein, Ulrich. "Umsetzung von α-Cyan-phenylacetaldehyd mit Sulfonylchlorid." Angewandte Chemie 94, no. 7 (January 16, 2006): 548. http://dx.doi.org/10.1002/ange.19820940718.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Tóth, M., A. Nagy, I. Szarukán, K. Ary, A. Cserenyec, B. Fenyődi, D. Gombás, et al. "One Decade’s Research Efforts in Hungary to Develop a Bisexual Lure for the Cotton Bollworm Helicoverpa armigera Hübner." Acta Phytopathologica et Entomologica Hungarica 55, no. 1 (August 31, 2020): 79–88. http://dx.doi.org/10.1556/038.55.2020.005.

Full text

Abstract:

The addition of synthetic (E)-anethol to the known attractant phenylacetaldehyde synergized attraction of the cotton bollworm Helicoverpa armigera, the blend invariably catching 4 to 6 times more than phenylacetaldehyde on its own. Highest catches were recorded by the 1:1-3:1 blends. The addition of salicyl aldehyde, ±linalool, (R)-(+)-limonene, 2-methoxybenzyl alcohol and 4-methoxybenzyl alcohol (compounds described earlier in the literature as co-attractants for H. armigera), increased catches when added to phenylacetaldehyde. However, the addition of these compounds did not increase catches of the (E)-anethol+pheny- lacetaldehyde blend. When directly compared with performance of the synthetic pheromone, the (E)-anethol +phenylacetaldehyde blend caught an average of 27% of the catch in pheromone baited traps. On an average 79% of moths caught in traps with the (E)-anethol+phenylacetaldehyde blend were females, while traps with pheromone caught only males. The (E)-anethol+phenylacetaldehyde blend described in this study may form the basis for the development of an efficient bisexual lure for H. armigera AFTER further optimization.

APA, Harvard, Vancouver, ISO, and other styles

3

Panoutsopoulos, Georgios I. "Phenylacetaldehyde Oxidation by Freshly Prepared and Cryopreserved Guinea Pig Liver Slices: The Role of Aldehyde Oxidase." International Journal of Toxicology 24, no. 2 (March 2005): 103–9. http://dx.doi.org/10.1080/10915810590936373.

Full text

Abstract:

Phenylacetaldehyde is formed when the xenobiotic and biogenic amine 2-phenylethylamine is inactivated by a monoamine oxidase–catalyzed oxidative deamination. Exogenous phenylacetaldehyde is found in certain foodstuffs such as honey, cheese, tomatoes, and wines. 2-Phenylethylamine can trigger migraine attacks in susceptible individuals and can become fairly toxic at high intakes from foods. It may also function as a potentiator that enhances the toxicity of histamine and tyramine. The present investigation examines the metabolism of phenylacetaldehyde to phenylacetic acid in freshly prepared and in cryopreserved guinea pig liver slices. In addition, it compares the relative contribution of aldehyde oxidase, xanthine oxidase, and aldehyde dehydrogenase in the oxidation of phenylacetaldehyde using specific inhibitors for each oxidizing enzyme. The inhibitors used were isovanillin for aldehyde oxidase, allopurinol for xanthine oxidase, and disulfiram for aldehyde dehydrogenase. In freshly prepared liver slices, phenylacetaldehyde was converted mainly to phenylacetic acid, with traces of 2-phenylethanol being present. Disulfiram inhibited phenylacetic acid formation by 80% to 85%, whereas isovanillin inhibited acid formation to a lesser extent (50% to 55%) and allopurinol had little or no effect. In cryopreserved liver slices, phenylacetic acid was also the main metabolite, whereas the 2-phenylethanol production was more pronounced than that in freshly prepared liver slices. Isovanillin inhibited phenylacetic acid formation by 85%, whereas disulfiram inhibited acid formation to a lesser extent (55% to 60%) and allopurinol had no effect. The results in this study have shown that, in freshly prepared and cryopreserved liver slices, phenylacetaldehyde is converted to phenylacetic acid by both aldehyde dehydrogenase and aldehyde oxidase, with no contribution from xanthine oxidase. Therefore, aldehyde dehydrogenase is not the only enzyme responsible in the metabolism of phenylacetaldehyde, but aldehyde oxidase may also be important and thus its role should not be ignored.

APA, Harvard, Vancouver, ISO, and other styles

4

Sun, Zhirong, Xiang Hu, and Ding Zhou. "Wastewater Minimization in Indirect Electrochemical Synthesis of Phenylacetaldehyde." Scientific World JOURNAL 2 (2002): 48–52. http://dx.doi.org/10.1100/tsw.2002.76.

Full text

Abstract:

Wastewater minimization in phenylacetaldehyde production by using indirect electrochemical oxidation of phenylethane instead of the seriously polluting traditional chemical process is described in this paper. Results show that high current efficiency of Mn(III) and high yield of phenylacetaldehyde can be obtained at the same sulfuric acid concentration (60%). The electrolytic mediator can be recycled and there will be no waste discharged.

APA, Harvard, Vancouver, ISO, and other styles

5

Makino, Y., T. Dairi, and N. Itoh. "Directed evolution of phenylacetaldehyde reductase." Seibutsu Butsuri 43, supplement (2003): S80. http://dx.doi.org/10.2142/biophys.43.s80_3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Hoshino, Yujiro, Kiyoshi Honda, Kenta Tanaka, Mami Kishimoto, Naoya Ohtsuka, Yoshinori Iwama, and Hiroki Wada. "Highly Selective One-Pot Synthesis of Polysubstituted Isoflavanes using Styryl Ethers and Electron-Withdrawing ortho-Quinone Methides Generated In Situ." Synlett 30, no. 02 (December 17, 2018): 189–92. http://dx.doi.org/10.1055/s-0037-1611361.

Full text

Abstract:

A highly selective one-pot synthesis of polysubstituted isoflavanes has been developed. The reaction proceeds through the cycloaddition of methyl styryl ethers, derived from phenylacetaldehyde dimethyl acetals under acidic conditions, with electron-withdrawing ortho-quinone methides generated in situ. When phenylacetaldehyde dimethyl acetals were reacted with salicylaldehydes, the reaction proceeded smoothly to afford the corresponding isoflavanes stereoselectively in high yields and with excellent regioselectivities. The present reaction provides versatile access to functionalized isoflavanes, and constitutes a useful tool for the synthesis of biologically active molecules.

APA, Harvard, Vancouver, ISO, and other styles

7

Gou, Ming-Lei, Junqing Cai, Wensheng Song, Zhen Liu, Yun-Lai Ren, and Qingshan Niu. "Performance and coke species of HZSM-5 in the isomerization of styrene oxide to phenylacetaldehyde." RSC Advances 7, no. 70 (2017): 44247–53. http://dx.doi.org/10.1039/c7ra09007b.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Brown, Carla E., James McNulty, Claudia Bordón, Robert Yolken, and Lorraine Jones-Brando. "Enol ethers as carbonyl surrogates in a modification of the Povarov synthesis of 3-aryl quinolines and their anti-Toxoplasma activity." Organic & Biomolecular Chemistry 14, no. 25 (2016): 5951–55. http://dx.doi.org/10.1039/c6ob01083k.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Zhang, Xinyi, Nikolaos Kontoudakis, John W. Blackman, and Andrew C. Clark. "Copper(II) and Sulfur Dioxide in Chardonnay Juice and Shiraz Must: Impact on Volatile Aroma Compounds and Cu Forms in Wine." Beverages 5, no. 4 (December 10, 2019): 70. http://dx.doi.org/10.3390/beverages5040070.

Full text

Abstract:

This work outlines the influence of Cu(II) and SO2 concentrations in Chardonnay juice or Shiraz must on the respective wine composition. Analyses were conducted pre- and post-fermentation, after cold stabilization, after bentonite treatment (Chardonnay only), at bottling, and 15 months after bottling. The quantification of total Cu was conducted by inductively coupled plasma optical emission spectrometry and free Cu by stripping potentiometry. Low molecular weight sulfur compounds, volatile aldehyde compounds, and general volatile compounds, including esters and terpenes, were quantified with gas-chromatography- or liquid-chromatography-QQQ-mass spectrometry. For Chardonnay, increased Cu concentration in the juice resulted in higher concentrations of Cu in the respective wine, while Shiraz wines showed no significant difference. Increased Cu addition to Chardonnay juice also produced significantly higher concentrations of H2S, 3-methylbutanal, and methional, but lower concentrations of methanethiol and phenylacetaldehyde, while SO2 addition increased 3-methylbutanal and phenylacetaldehyde, and decreased methanethiol production from post-fermentation to post-bottle aging. For the Shiraz, SO2 led to higher concentrations of H2S, and both SO2 and Cu addition increased the concentrations of hexanal, 3-methylbutanal, and phenylacetaldehyde in wine, but this effect diminished after cold stabilization. This study shows that SO2 and Cu in grape juice/must can have long-term implications for wine composition.

APA, Harvard, Vancouver, ISO, and other styles

10

Ren, Xiaopu, Wei Wang, Yingjie Bao, Yuxia Zhu, Yawei Zhang, Yaping Lu, Zengqi Peng, and Guanghong Zhou. "Isorhamnetin and Hispidulin from Tamarix ramosissima Inhibit 2-Amino-1-Methyl-6-Phenylimidazo[4,5-b]Pyridine (PhIP) Formation by Trapping Phenylacetaldehyde as a Key Mechanism." Foods 9, no. 4 (April 3, 2020): 420. http://dx.doi.org/10.3390/foods9040420.

Full text

Abstract:

Tamarix has been widely used as barbecue skewers to obtain a good taste and a unique flavor of roast lamb in China. Many flavonoids have been identified from Tamarix, which is an important strategy employed to reduce the formation of heterocyclic amines (HAs) in roast meat. Isorhamnetin, hispidulin, and cirsimaritin from Tamarix ramosissima bark extract (TRE) effectively inhibit the formation of 2-amino-1-methyl-6-phenylimidazo[4,5-b] pyridine (PhIP), the most abundant HAs in foods, both in roast lamb patties and in chemical models. According to the results of the GC-MS analysis, TRE and the three flavonoids significantly reduced the contents of phenylacetaldehyde, an important intermediate involved in PhIP formation at three levels. A subsequent ultra performance liquid chromatography-mass spectrometry (UPLC-MS) analysis revealed that these flavonoids trapped phenylacetaldehyde by forming interaction adducts. The formation of three postulated adducts, 8-C-(E-phenylethenyl)isorhamnetin, 6-C-(E-phenylethenyl)isorhamnetin and 8-C-(E-phenylethenyl)hispidulin, in the chemical models and roast lamb patties was further confirmed by a TOF-MS/MS analysis. Our results demonstrate that TRE and the corresponding flavonoids trap phenylacetaldehyde to form adducts and thus inhibit PhIP formation, suggesting their great potential beneficial effects on human health.

APA, Harvard, Vancouver, ISO, and other styles

11

Oelschlägel, Michel, Janosch A. D. Gröning, Dirk Tischler, Stefan R. Kaschabek, and Michael Schlömann. "Styrene Oxide Isomerase of Rhodococcus opacus 1CP, a Highly Stable and Considerably Active Enzyme." Applied and Environmental Microbiology 78, no. 12 (April 13, 2012): 4330–37. http://dx.doi.org/10.1128/aem.07641-11.

Full text

Abstract:

ABSTRACTStyrene oxide isomerase (SOI) is involved in peripheral styrene catabolism of bacteria and converts styrene oxide to phenylacetaldehyde. Here, we report on the identification, enrichment, and biochemical characterization of a novel representative from the actinobacteriumRhodococcus opacus1CP. The enzyme, which is strongly induced during growth on styrene, was shown to be membrane integrated, and a convenient procedure was developed to highly enrich the protein in active form from the wild-type host. A specific activity of about 370 U mg−1represents the highest activity reported for this enzyme class so far. This, in combination with a wide pH and temperature tolerance, the independence from cofactors, and the ability to convert a spectrum of substituted styrene oxides, makes a biocatalytic application imaginable. First, semipreparative conversions were performed from which up to 760 μmol of the pure phenylacetaldehyde could be obtained from 130 U of enriched SOI. Product concentrations of up to 76 mM were achieved. However, due to the high chemical reactivity of the aldehyde function, SOI was shown to be the subject of an irreversible product inhibition. A half-life of 15 min was determined at a phenylacetaldehyde concentration of about 55 mM, indicating substantial limitations of applicability and the need to modify the process.

APA, Harvard, Vancouver, ISO, and other styles

12

Egorov, Maxim, Bernard Delpech, Geneviève Aubert, Thierry Cresteil, Maria Concepcion Garcia-Alvarez, Pascal Collin, and Christian Marazano. "A concise formation of N-substituted 3,4-diarylpyrroles – synthesis and cytotoxic activity." Org. Biomol. Chem. 12, no. 9 (2014): 1518–24. http://dx.doi.org/10.1039/c3ob42309c.

Full text

Abstract:

Sequential condensation of a phenacyl halide with a primary amine and a phenylacetaldehyde led to N-substituted 3,4-diarylpyrroles. Synthesis of analogs of the marine alkaloid halitulin and cytotoxic studies are reported.

APA, Harvard, Vancouver, ISO, and other styles

13

Al-Smadi, Derar, Thilak Enugala, Thomas Norberg, Jan Kihlberg, and Mikael Widersten. "Synthesis of Substrates for Aldolase-Catalysed Reactions: A Comparison of Methods for the Synthesis of Substituted Phenylacetaldehydes." Synlett 29, no. 09 (March 19, 2018): 1187–90. http://dx.doi.org/10.1055/s-0036-1591963.

Full text

Abstract:

Methods for the synthesis of phenylacetaldehydes (oxidation, one-carbon chain extension) were compared by using the synthesis of 4-methoxyphenylacetaldehyde as a model example. Oxidations of 4-methoxyphenylethanol with activated DMSO (Swern oxidation) or manganese dioxide gave unsatisfactory results; whereas oxidation with 2-iodoxybenzoic acid (IBX) produced 4-methoxyphenylacetaldehyde in reasonable (75%) yield. However, Wittig-type one-carbon chain extension with methoxymethylene-triphenylphosphine followed by hydrolysis gave an excellent (81% overall) yield of 4-methoxyphenylacetaldehyde from 4-methoxybenzaldehyde (a cheap starting material). This approach was subsequently used to synthesise a set of 10 substituted phenylacetaldehydes in good to excellent yields.

APA, Harvard, Vancouver, ISO, and other styles

14

Jiang, Yuqin, Xingfeng Li, Yaru Zhao, Shuhong Jia, Mingrui Li, Zhiqi Zhao, Ruili Zhang, Wei Li, and Weiwei Zhang. "An efficient CuI/DBU-catalyzed one-pot protocol for synthesis of 1,4-disubstituted 1,2,3-triazoles." RSC Advances 6, no. 111 (2016): 110102–7. http://dx.doi.org/10.1039/c6ra23789d.

Full text

Abstract:

A convenient CuI/DBU catalyzed one-pot method has been developed for the synthesis of 1,4-disubstituted 1,2,3-triazoles from aryl iodides, sodium azide and phenylacetaldehyde derivatives or from aryl iodides, sodium azide and alkynes in DMSO.

APA, Harvard, Vancouver, ISO, and other styles

15

Contini, Alessandro, Emanuela Erba, and Pasqualina Trimarco. "Synthesis of phenylacetaldehyde amidines and their intramolecular cyclization." Arkivoc 2008, no. 12 (April 14, 2008): 136–47. http://dx.doi.org/10.3998/ark.5550190.0009.c16.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Sanchez-Politta, S., A. Campanelli, F. Pashe-Koo, J. H. Saurat, and P. Piletta. "Allergic contact dermatitis to phenylacetaldehyde: a forgotten allergen?" Contact Dermatitis 56, no. 3 (March 2007): 171–72. http://dx.doi.org/10.1111/j.1600-0536.2007.01030.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Cecotti, Roberto, Emanuele Carpana, Patrizia Bergomi, and Aldo Tava. "Volatile Constituents of Trifolium pratense spp. nivale Quantified at Different Growth Stages, and Evaluation of their Antimicrobial Activity." Natural Product Communications 8, no. 11 (November 2013): 1934578X1300801. http://dx.doi.org/10.1177/1934578x1300801131.

Full text

Abstract:

The composition of the volatile fraction of Trifolium pratense L. ssp. nivale (Sieber) Asch. et Gr. from the southwestern Alps was investigated. Fresh aerial parts were collected in the summer at three different growth stages, namely vegetative, flowering and fruiting. The oils obtained by steam-distillation accounted for 0.006 to 0.011% of the fresh plant material and their composition was determined by GC/FID and GC/MS. Several classes of compounds were found, with a predominance of alcohols in all phases, followed by aldehydes, hydrocarbons, terpenes, phenolics, ketones, acids and esters. The oil composition varied both in quantity and quality; the most abundant compounds were oct-1-en-3-ol and phenylacetaldehyde in the vegetative and flowering phases, and phenylacetaldehyde and 2-phenylethanol in the fruiting phase. The essential oils obtained were tested for activity against two major bee pests, i.e. Paenibacillus larvae and Melissococcus plutonius, and against a reference bacterial species, Bacillus subtilis.

APA, Harvard, Vancouver, ISO, and other styles

18

Sahu, Archana K., Ramanjaneyulu Unnava, Bipin K. Behera, and Anil K. Saikia. "Synthesis of dibenzocyclohepta[1,2-a]naphthalene derivatives from phenylacetaldehyde and alkynyl benzyl alcohols via sequential electrophilic addition and double Friedel–Crafts reactions." Organic & Biomolecular Chemistry 19, no. 11 (2021): 2430–35. http://dx.doi.org/10.1039/d1ob00057h.

Full text

Abstract:

A simple methodology for the regioselective synthesis of substituted dibenzocyclohepta[1,2-a]naphthalenes from phenylacetaldehydes and ortho-alkynyl benzyl alcohols in the presence of a Lewis acid has been developed.

APA, Harvard, Vancouver, ISO, and other styles

19

Marrufo-Curtido, Almudena, Arancha de-la-Fuente-Blanco, María-Pilar Sáenz-Navajas, Vicente Ferreira, Mónica Bueno, and Ana Escudero. "Sensory Relevance of Strecker Aldehydes in Wines. Preliminary Studies of Its Removal with Different Type of Resins." Foods 10, no. 8 (July 23, 2021): 1711. http://dx.doi.org/10.3390/foods10081711.

Full text

Abstract:

The orthonasal quality of two synthetic contexts of wine (young wine and oaked wine) spiked with six different levels of the Strecker aldehydes (isobutyraldehyde, 2-methylbutanal, 3-methylbutanal, methional and phenylacetaldehyde) was evaluated by a panel of wine experts. The aldehyde levels simulated the concentrations present in wines protected from oxidation during production and storage and after severe oxidation. Significant quality detriments were observed at concentrations of 13 µg/L of methional, 49 µg/L of phenylacetaldehyde, 17 µg/L of isobutyraldehyde, 12 µg/L of 2-methylbutanal and 24 µg/L of 3-methylbutanal. The presence of these levels of aldehyde concentrations induced the reduction of fruitiness in young wines and of woody notes in oaked wines as well as the appearance of the typical attributes that define wine oxidation. More than 75% of recently opened commercial wines contain total levels of Strecker aldehydes higher than those, however their effect is not always noticeable as they are forming inodorous adducts with SO2. Nevertheless, this content is a potential risk for the shelf life of the wine, as once SO2 is depleted, these aldehydes could release back into their odour-active forms. Thus, in order to reduce the presence of Strecker aldehydes, eight different resins were studied (two scavengers, four mixed-mode anion exchange and two pure anion exchange) in white wine at two levels of SO2. After 24-h contact, the mixed mode Strata X-A resin was able to significantly reduce aldehydes’ percentages: between 11% for isobutyraldehyde and 86% for phenylacetaldehyde. On the other hand, wine colour was affected and therefore the applicability of the treatment should be further studied. However, this work can be considered a starting point to solve the technological challenge involved in the elimination of aldehydes from wine.

APA, Harvard, Vancouver, ISO, and other styles

20

Szalárdi, T., A. Nagy, F. Oláh, M. Tóth, and S. Koczor. "Preliminary data on attractiveness of phenylacetaldehyde-based lures on economically important plant bug pests (Hemiptera: Miridae)." International Journal of Horticultural Science 27 (July 21, 2021): 87–94. http://dx.doi.org/10.31421/ijhs/27/2021/8259.

Full text

Abstract:

Several plant bug species (Miridae) are important pests of crops and vegetables, thus monitoring them is of essential importance for effective pest control. During the current, preliminary study synthetic plant volatile combinations were tested in field conditions in Hungary in alfalfa fields. Beside semiochemical baited traps, sweep-netting was also performed. In the experiments three plant bug species were found in higher numbers: Adelphocoris lineolatus, Lygus rugulipennis and L. pratensis. As a novel, interesting finding L. pratensis was attracted to phenylacetaldehyde baited traps. For all species, both males and females were trapped in all combinations. Sweep-netting and semiochemical baited traps showed different efficacy in case of the three species, as sweep-netting catches were highly biased for A. lineolatus, which indicates the higher efficacy of this method as compared to the tested semiochemical-baited traps. On the other hand, semiochemical baited showed better performance for L. rugulipennis and L. pratensis. For these species none of the tested combinations performed better than phenylacetaldehyde baited traps. The potential implication of results in view of monitoring are discussed.

APA, Harvard, Vancouver, ISO, and other styles

21

Paparatto, G., and G. Gregorio. "A highly selective method for the synthesis of phenylacetaldehyde." Tetrahedron Letters 29, no. 12 (January 1988): 1471–72. http://dx.doi.org/10.1016/s0040-4039(00)80328-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Ferrández, Abel, Marı́a A. Prieto, José L. Garcı́a, and Eduardo Dı́az. "Molecular characterization of PadA, a phenylacetaldehyde dehydrogenase fromEscherichia coli." FEBS Letters 406, no. 1-2 (April 7, 1997): 23–27. http://dx.doi.org/10.1016/s0014-5793(97)00228-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Donadío, Lucía Gandolfi, Mariana A. Galetti, Gianluca Giorgi, Marcello Rasparini, and Maria J. Comin. "Anti-Selective Organocatalytic Michael Addition between Phenylacetaldehyde and Nitrostyrene." Journal of Organic Chemistry 81, no. 17 (August 2016): 7952–57. http://dx.doi.org/10.1021/acs.joc.6b01061.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Manzoni, Matilde, Francesco Molinari, Antonio Tirelli, and Fabrizio Aragozzini. "Phenylacetaldehyde by acetic acid bacteria oxidation of 2-phenylethanol." Biotechnology Letters 15, no. 4 (April 1993): 341–46. http://dx.doi.org/10.1007/bf00128273.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Wang, Libin, Elizabeth A. Baldwin, Zhifang Yu, and Jinhe Bai. "The Impact of Kitchen and Food Service Preparation Practices on the Volatile Aroma Profile in Ripe Tomatoes: Effects of Refrigeration and Blanching." HortScience 50, no. 9 (September 2015): 1358–64. http://dx.doi.org/10.21273/hortsci.50.9.1358.

Full text

Abstract:

Both refrigeration and blanching of red-stage tomatoes are common practices in Japan home kitchens and in food service operations. However, little is reported on the impact of such practices on aroma profiles in tomato fruits. In this study, ‘FL 47’ tomatoes at red stage were dipped in 50 °C hot water for 5 minutes or exposed to 5 °C for 4 days to simulate consumer handling of tomato in food service or home kitchens, respectively. Of the 42 volatile compounds detected, refrigeration generally suppressed production of aldehydes, alcohols, oxygen-containing heterocyclic compounds, and nitrogen- and oxygen-containing heterocyclic compounds, including the following abundant and/or important volatiles: pentanal, 3-methylbutanal, 2-methylbutanal, hexanal, cis-3-hexenal, trans-2-hexenal, 2-phenylacetaldehyde, pentanol, 3-methylbutanol, 2-phenylethanol, 1-penten-3-one, geranial, and geranylacetone. On the other hand, the production of aldehydes, alcohols, hydrocarbons, oxygen-containing heterocyclic compounds, and nitrogen- and oxygen-containing heterocyclic compounds was reduced by blanching, associated with low concentrations of 2-methylbutanal, pentanal, cis-3-hexenal, trans-2-hexenal, 2-phenylacetaldehyde, pentanol, 2-methylbutanol, and 2-phenylethanol. These results indicate that a short blanching or refrigeration of tomatoes substantially impacts tomato aroma quality.

APA, Harvard, Vancouver, ISO, and other styles

26

Makino, Y., T. Dairi, and N. Itoh. "3P073 Optimization of amino-acid substitutions in engineered phenylacetaldehyde dehydrogenase." Seibutsu Butsuri 45, supplement (2005): S222. http://dx.doi.org/10.2142/biophys.45.s222_1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Wood, William F., Brian D. Foy, and David L. Largent. "Hexanoic acid and phenylacetaldehyde in the false truffle, Truncocolumella citrina." Biochemical Systematics and Ecology 26, no. 5 (July 1998): 589–91. http://dx.doi.org/10.1016/s0305-1978(98)00014-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Arthurs, Steven P., Nastaran Tofangsazi, Robert L. Meagher, and Ron Cherry. "Attraction ofPlecia nearctica(Diptera: Bibionidae) to Floral Lures Containing Phenylacetaldehyde." Florida Entomologist 95, no. 1 (March 2012): 199–201. http://dx.doi.org/10.1653/024.095.0132.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Shimizu, Eiichi, Hideyuki Ichise, Takuya Odawara, and Takamitsu Yorlfuji. "NADP-Dependent Phenylacetaldehyde Dehydrogenase for Degradation of Phenylethylamine inArthrobacter globiformis." Bioscience, Biotechnology, and Biochemistry 57, no. 5 (January 1993): 852–53. http://dx.doi.org/10.1271/bbb.57.852.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Farhi, Moran, Orly Lavie, Tania Masci, Keren Hendel-Rahmanim, David Weiss, Hagai Abeliovich, and Alexander Vainstein. "Identification of rose phenylacetaldehyde synthase by functional complementation in yeast." Plant Molecular Biology 72, no. 3 (November 1, 2009): 235–45. http://dx.doi.org/10.1007/s11103-009-9564-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Oelschlägel, Michel, Anika Riedel, Aurelia Zniszczoł, Katarzyna Szymańska, Andrzej B. Jarzębski, Michael Schlömann, and Dirk Tischler. "Immobilization of an integral membrane protein for biotechnological phenylacetaldehyde production." Journal of Biotechnology 174 (March 2014): 7–13. http://dx.doi.org/10.1016/j.jbiotec.2014.01.019.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

BOWLES, BOBBY L., and ARTHUR J. MILLER. "Antibotulinal Properties of Selected Aromatic and Aliphatic Aldehydes." Journal of Food Protection 56, no. 9 (September 1, 1993): 788–94. http://dx.doi.org/10.4315/0362-028x-56.9.788.

Full text

Abstract:

Aromatic and aliphatic aldehydes were tested for their effectiveness against Clostridium botulinum spores and cells. Six-tenths millimolar benzaldehyde, piperonal, phenylacetaldehyde, α-amylcinnamaldehyde, vanillin, or phenylglyoxal delayed germination in botulinal assay medium (BAM) broth after 6 h exposure at 32°C. Sporicidal activity was observed with 1.25 mM vanillin, 39 mM isobutyraldehyde, 156 mM pyruvaldehyde or valeraldehyde, 625 mM benzaldehyde, and 2,500 mM α-amylcinnamaldehyde. Twenty-five millimolars of cinnamaldehyde, phenylacetaldehyde, pyruvaldehyde, and vanillin were most active against vegetative cells at pH 7.0 in BAM broth, while 125 mM was required for benzaldehyde, acetaldehyde, piperonal, or phenylglyoxal. Three millimolars benzaldehyde, 5.0 mM phenylglyoxal, 150 mM cinnamaldehyde, 200 mM pyruvaldehyde and vanillin, and 300 mM piperonal inhibited 9 h dipicolinic acid release in BAM broth at 32°C. Spore resistance to a 20-min 80°C thermal treatment was reduced when challenged with prior exposure to 100 mM cinnamaldehyde, piperonal, pyruvaldehyde, vanillin, or phenylglyoxal. Inhibition by cinnamaldehyde, piperonal, and phenylglyoxal was retained in commercial canned chicken and in beef broths. Five millimolars of benzaldehyde, cinnamaldehyde, piperonal, pyruvaldehyde, or phenylglyoxal delayed neurotoxin production for 48 h at 32°C, while 25 mM was required for vanillin. These results indicate that certain aldehydes inhibit C. botulinum, and aromaticity improves efficacy.

APA, Harvard, Vancouver, ISO, and other styles

33

Ceia, T. F., A. G. Silva, J. V. Pinto, M. H. Casimiro, A. M. Ramos, and J. Vital. "Catalytic Composite PVA Membranes for Acetalisation of Phenylacetaldehyde in Membrane Reactors." Procedia Engineering 44 (2012): 1612–18. http://dx.doi.org/10.1016/j.proeng.2012.08.886.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Yun, Sock-Sung, IL-Hwan Suh, Sung-San Choi, and Samkeun Lee. "Stereospecific Double Aldol Reaction of Phenylacetaldehyde Catalyzed by Group 4 Metallocene." Chemistry Letters 27, no. 10 (October 1998): 985–86. http://dx.doi.org/10.1246/cl.1998.985.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Motsios, Georgios, Mohammed Ahmar, Abdel-Ilah Nadi, and Joelle Paris. "One-Pot Preparation of 3,5-Hexadienoic Acid Compounds from Phenylacetaldehyde Derivatives." Synthetic Communications 21, no. 6 (March 1991): 819–26. http://dx.doi.org/10.1080/00397919108019763.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Costa, Vinícius V., Kelly A. da Silva Rocha, Ivan V. Kozhevnikov, and Elena V. Gusevskaya. "Isomerization of styrene oxide to phenylacetaldehyde over supported phosphotungstic heteropoly acid." Applied Catalysis A: General 383, no. 1-2 (July 31, 2010): 217–20. http://dx.doi.org/10.1016/j.apcata.2010.06.005.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

SALLA, I., O. BERGADA, P. SALAGRE, Y. CESTEROS, F. MEDINA, J. SUEIRAS, and T. MONTANARI. "Isomerisation of styrene oxide to phenylacetaldehyde by fluorinated mordenites using microwaves." Journal of Catalysis 232, no. 1 (May 15, 2005): 239–45. http://dx.doi.org/10.1016/j.jcat.2004.10.011.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Choo, Joel P. S., Richard A. Kammerer, Xiaodan Li, and Zhi Li. "High‐Level Production of Phenylacetaldehyde using Fusion‐Tagged Styrene Oxide Isomerase." Advanced Synthesis & Catalysis 363, no. 6 (February 5, 2021): 1714–21. http://dx.doi.org/10.1002/adsc.202001500.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Al-Amsyar, Syed Muhammad, Nur Hanis Zubir, Nur Azila Abdullah, Nur Aqilah Saleh, Anis Amalina Amir Nurddin Fakri, Nurul Aqilah Mohd Razib, Afifa Nadiera Tarmidi, Hasyiya Karimah Adli, Noor Azlina Ibrahim, and Mohammed Aurifullah. "Synthesis of silica/carbon composite from agricultural waste as heterogeneous acid catalysts to produce dioxolane moieties from a biodiesel-derived waste compound." Journal of Tropical Resources and Sustainable Science (JTRSS) 6, no. 2 (July 17, 2021): 73–76. http://dx.doi.org/10.47253/jtrss.v6i2.565.

Full text

Abstract:

Silica/carbon composites from the carbonization of rice husk have been employed to act asheterogeneous Brønsted acid catalysts. These composites have been used to catalyze theacetalization of phenylacetaldehyde, vanillin, and 2-acetonaphthone with propylene glycol toproduce hyacinth, vanilla, and orange blossom scent fragrances. As the carbonization temperaturesaffect the physicochemical properties and hence their catalytic activity, several characterizationtechniques and data manipulation have been performed to understand the correlations. Acid densityand hydrophilicity has been proved to play a crucial part to obtain an optimized yield of desiredproducts.

APA, Harvard, Vancouver, ISO, and other styles

40

Kružík, Vojtěch, Adéla Grégrová, Aleš Rajchl, and Helena Čížková. "Study on Honey Quality Evaluation and Detection of Adulteration by Analysis of Volatile Compounds." Journal of Apicultural Science 61, no. 1 (June 27, 2017): 17–27. http://dx.doi.org/10.1515/jas-2017-0002.

Full text

Abstract:

Abstract Fast evaluation of honey quality is a topical and significant problem of the food industry, bee keepers and consumers. In this work, 22 samples of commercially available honey aromas (with methyl and ethyl esters of phenylacetic acid predominated), 13 samples of authentic honey collected directly from bee keepers (characterised by high content of benzaldehyde, 2-phenylethanol, hotrienol and 2-phenylacetaldehyde) and 63 honeys purchased from an outdoor market were evaluated based on volatiles profiles determined through solid-phase microextraction coupled with gas chromatography-mass spectrometry (SPME-GC/MS) and then suspicious samples were identified. The results were statistically processed and compared with results of a sensory analysis. Six honeys, which differed significantly in volatiles profiles (outliers detected by Factor Analysis), selected volatile substance representation (furan-2-carbaldehyde, 1,4-dimethylpyrazole, benzaldehyde, 2-phenylacetaldehyde) and honey aroma intensity and pleasantness were subjected to targeted analyses (i.e. determination of 5-(hydroxymethyl)-2-furaldehyde, diastase activity, unauthorized additive presence). Four of these suspicious samples were found to have high content of 5-(hydroxymethyl)-2-furaldehyde (more than 40 mg/kg), three honeys had low values for diastase activity (less than 8) and three samples positive for triacetin addition. The fact that all these samples revealed a breach of least one of the selected quality parameters defined by the Codex Alimentarius standard proved the proposed methodology to be a useful tool for fast quality evaluation of honey.

APA, Harvard, Vancouver, ISO, and other styles

41

Penner, Glenn H. "Conformational preference and internal rotation about the C1—Cα bond in phenylacetaldehyde and some benzyl alkyl ketones from 1H nuclear magnetic resonance and abinitio molecular orbital calculations." Canadian Journal of Chemistry 65, no. 3 (March 1, 1987): 538–40. http://dx.doi.org/10.1139/v87-094.

Full text

Abstract:

Analysis of the 1H nuclear magnetic resonance spectra of the benzyl moieties in phenylacetaldehyde, benzyl methyl ketone, benzyl ethyl ketone, benzyl isopropyl ketone, and 3,5-dichlorobenzyl tert-butyl ketone yields the long-range couplings between ring and α protons. These stereospecific couplings change very little upon replacement of the aldehydic hydrogen by various alkyl groups. The couplings for all the molecules studied fall within the ranges 4J(CH2, Ho) = −0.566 ± 0.008 Hz, 5J(CH2, Hm) = 0.278 ± 0.002 Hz, and 6J(CH2, Hp) = −0.409 ± 0.010 Hz, suggesting that in the ketones the alkyl group prefers to be trans to the phenyl ring and does not interfere with rotation about the C1—Cα bond. The long-range couplings are consistent with a potential function V(θ) = 8.4 ± 1.2 sin2 θ for two-fold rotation about the C1—Cα bond; θ is the angle between the carbonyl and benzene ring plane. Abinitio molecular orbital calculations on phenylacetaldehyde at the STO-3G level with the C=O bond cis to the phenyl group yield a potential of V(θ) = (8.65 ± 0.73) sin2 θ + (1.27 ± 0.80) sin2 2θ, rather close to the experimental potential but with a small fourfold component. The spin–spin coupling constant between the aldehydic and α protons displays a solvent dependence consistent with previously reported values. The insensitivity of 4J(CH2, Ho), 5J(CH2, Hm), and 6J(CH2, Hp) to solvent suggests that [Formula: see text] is very weakly dependent on the rotation of the aldehyde group.

APA, Harvard, Vancouver, ISO, and other styles

42

Gou, Bo-Bo, Hang-Fan Liu, Jie Chen, and Ling Zhou. "Palladium-Catalyzed Site-Selective C(sp3)–H Arylation of Phenylacetaldehydes." Organic Letters 21, no. 17 (August 28, 2019): 7084–88. http://dx.doi.org/10.1021/acs.orglett.9b02650.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Mohd-Hairu, Ab Rahim, Chan Wai Sun, Parameswari Namasivaya, Gwendoline Ee Cheng Lian, and Janna Ong Abdull. "Putative Phenylacetaldehyde Synthase Transcript of Vanda Mimi Palmer: Sequence and Expression Analysis." International Journal of Botany 6, no. 4 (September 15, 2010): 424–32. http://dx.doi.org/10.3923/ijb.2010.424.432.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Meagher, R. L., and J. H. Frank. "Larra bicolor (Hymenoptera: Sphecidae: Larrinae) Collected in Pheromone- and Phenylacetaldehyde-Baited Traps." Florida Entomologist 81, no. 4 (December 1998): 555. http://dx.doi.org/10.2307/3495957.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Meagher, Robert L. "Collection of Soybean Looper and Other Noctuids in Phenylacetaldehyde-Baited Field Traps." Florida Entomologist 84, no. 1 (March 2001): 154. http://dx.doi.org/10.2307/3496678.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Le Guenic, Sarah, Claire Ceballos, and Christophe Len. "Simple green dehydration in biphasic medium: Application to the synthesis of phenylacetaldehyde." Journal of Molecular Catalysis A: Chemical 411 (January 2016): 72–77. http://dx.doi.org/10.1016/j.molcata.2015.10.001.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Sato, Tsuneo, Junzo Otera, and Hitosi Nozaki. "Mechanistic insight into allylmetal-thioacetal reactions employing 2-acetoxy-2-phenylacetaldehyde thioacetals." Journal of Organic Chemistry 55, no. 25 (December 1990): 6116–21. http://dx.doi.org/10.1021/jo00312a016.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Makino, Yoshihide, Kousuke Inoue, Tohru Dairi, and Nobuya Itoh. "Engineering of Phenylacetaldehyde Reductase for Efficient Substrate Conversion in Concentrated 2-Propanol." Applied and Environmental Microbiology 71, no. 8 (August 2005): 4713–20. http://dx.doi.org/10.1128/aem.71.8.4713-4720.2005.

Full text

Abstract:

ABSTRACT Phenylacetaldehyde reductase (PAR) is suitable for the conversion of various aryl ketones and 2-alkanones to corresponding chiral alcohols. 2-Propanol acts as a substrate solvent and hydrogen donor of coupled cofactor regeneration during the conversion of substrates catalyzed by PAR. To improve the conversion efficiency in high concentrations of substrate and 2-propanol, selection of a PAR mutant library and the subsequent rearrangement of mutations were attempted. With only a single selection round and following the manual combination of advantageous mutations, PAR was successfully adapted for the conversion of high concentrations of substrate with concentrated 2-propanol. This method will be widely applicable for the engineering of enzymes potentially valuable for industry.

APA, Harvard, Vancouver, ISO, and other styles

49

Cheng, Ka-Wing, Chi Chun Wong, Jianfei Chao, Clive Lo, Feng Chen, Ivan K. Chu, Chi-Ming Che, Chi-Tang Ho, and Mingfu Wang. "Inhibition of mutagenic PhIP formation by epigallocatechin gallate via scavenging of phenylacetaldehyde." Molecular Nutrition & Food Research 53, no. 6 (May 12, 2009): 716–25. http://dx.doi.org/10.1002/mnfr.200800206.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Nascimento, Ana Lucia T. O., and Giuseppe Cilento. "GENERATION OF ELECTRONICALLY EXCITED STATES IN SITU. POLYMORPHONUCLEAR LEUKOCYTES TREATED WITH PHENYLACETALDEHYDE." Photochemistry and Photobiology 46, no. 1 (July 1987): 137–41. http://dx.doi.org/10.1111/j.1751-1097.1987.tb04747.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Phenylacetaldehyd'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles