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Sinapic acid

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https://www.readbyqxmd.com/read/28091680/protective-effects-of-dietary-glycine-and-glutamic-acid-toward-the-toxic-effects-of-oxidized-mustard-oil-in-rabbits
#1
Alam Zeb, Saleem Ur Rahman
The protective role of glycine and glutamic acid against the toxic effects of oxidized oil was studied for the first time. Mustard seed oil was thermally oxidized and characterized for quality characteristics and polyphenolic composition using reversed phase HPLC-DAD. Significant changes in the quality characteristics occurred with thermal oxidation. Fourteen polyphenolic compounds were identified and quantified in oils. Quercetin-3-glucoside, quercetin-3-feruloylsophoroside, catechin, quercetin-3-rutinoside, quercetin-3,7-diglucoside, sinapic acid and vanillic acid hexoside were the major compounds in the fresh and oxidized oil...
January 16, 2017: Food & Function
https://www.readbyqxmd.com/read/28045228/syringaresinol-a-renewable-and-safer-alternative-to-bisphenol-a-for-epoxy-amine-resins
#2
Marine Janvier, Louis Hollande, Abdus Samad Jaufurally, Miguel Pernes, Raphaël Ménard, Marina Grimaldi, Johnny Beaugrand, Patirck Balaguer, Paul-Henri Ducrot, Florent Allais
A renewable bis-epoxy, SYR-EPO, has been prepared from syringaresinol, a naturally occurring bisphenol deriving from sinapic acid, using a chemo-enzymatic synthetic pathway. Estrogenic activity test revealed no endocrine disruption for syringaresinol. Its glycidylation afforded bis-epoxy SYR-EPO with excellent yield and purity. This biobased safer epoxy precursor was then cured with conventional and renewable diamines for the preparation of epoxy-amine resins. The resulting thermosets were thermally and mechanically characterized (TGA, DSC and DMA)...
January 3, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28035161/composition-bioactive-compounds-and-antioxidant-activity-of-common-indian-fruits-and-vegetables
#3
Jatinder Pal Singh, Amritpal Kaur, Khetan Shevkani, Narpinder Singh
The present work was undertaken to evaluate the chemical composition (proximate, minerals and dietary fibre), colour parameters, antioxidant activity and polyphenol profiles of different fruits (pomegranate, kinnow, mango, banana, jambolan, grapes and sapodilla) and vegetables (beetroot, brinjal, orange carrot, bitter gourd, mentha and spinach). The amount of insoluble dietary fibre was higher than soluble dietary fibre for all fruits and vegetables. Vegetables showed superior mineral composition (higher amounts of K, Ca and Fe) as compared to fruits...
November 2016: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28012309/development-of-new-efficient-method-for-isolation-of-phenolics-from-sea-algae-prior-to-their-rapid-resolution-liquid-chromatographic-tandem-mass-spectrometric-determination
#4
Bořivoj Klejdus, Merichel Plaza, Marie Šnóblová, Lea Lojková
The extraction of phenolic compounds from 4 different sea algae samples, three brown algae (Cystoseira abies-marina, C. abies-marina grinded under cryogenic conditions with liquid nitrogen, Undaria pinnatifida and Sargassum muticum) and one red algae (Chondrus crispus) via solid phase extraction using micro-elution solid-phase extraction (μ-SPE) plate method was studied. Prior to μ-SPE, 50mg of algae with 80% methanol mixture was extracted in hyphenated series by various extraction techniques, such as pressurized liquid extraction and Ika Ultra-Turrax(®) Tube Drive, in combination with ultrasound assisted extraction...
December 14, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/27987995/chitosan-hydrogel-formation-using-laccase-activated-phenolics-as-cross-linkers
#5
Daniela Huber, Gregor Tegl, Martina Baumann, Eva Sommer, Elham Ghorbani Gorji, Nicole Borth, Gerhard Schleining, Gibson S Nyanhongo, Georg M Guebitz
Chitosan hydrogels are gaining increasing interest for biomedical applications due to attractive properties such as biocompatibility. In order to replace toxic chemical cross-linkers for hydrogel formation, we investigated the cross-linking potential of laccase oxidized phenolics. HPLC-TOF-MS and ATR-FTIR demonstrated that phenolics were bond to glucosamine as chitosan model substrate. Phenolics concentrations required for hydrogel formation varied from 500μM for catechol to 5000μM for sinapic acid. The hydrogels showed different swelling and release properties assessed using methylene blue release as a model...
February 10, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/27982141/hydrogen-bond-dynamics-governs-the-effective-photoprotection-mechanism-of-plant-phenolic-sunscreens
#6
Fang Liu, Likai Du, Zhenggang Lan, Jun Gao
Sinapic acid derivatives are important sunscreen species in natural plants, which could provide protection from solar UV radiation. Using a combination of ultrafast excited state dynamics, together with classical molecular dynamics studies, we demonstrate that there is direct coupling of hydrogen bond motion with excited state photoprotection dynamics as part of the basic mechanism in solution. Beyond the intra-molecular degree of freedom, the inter-molecular motions on all timescales are potentially important for the photochemical or photophysical events, ranging from the ultrafast hydrogen bond motion to solvent rearrangements...
December 16, 2016: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/27979256/synthesis-and-in-vitro-antioxidant-and-antimicrobial-studies-of-novel-structured-phosphatidylcholines-with-phenolic-acids
#7
Marrapu Balakrishna, Shiva Shanker Kaki, Mallampalli S L Karuna, Sripada Sarada, C Ganesh Kumar, R B N Prasad
Novel phenoylated phosphatidylcholines were synthesized from 1,2-dipalmitoyl phosphatidylcholine/egg 1,2-diacyl phosphatidylcholine and phenolic acids such as ferulic, sinapic, vanillic and syringic acids. The structures of phenoylated phosphatidylcholines were confirmed by spectral analysis. 2-acyl-1-lyso phosphatidylcholine was synthesized from phosphatidylcholine via regioselective enzymatic hydrolysis and was reacted with hydroxyl protected phenolic acids to produce corresponding phenoylated phosphatidylcholines in 48-56% yields...
April 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27979063/spectral-and-colorimetric-characteristics-of-metal-chelates-of-acylated-cyanidin-derivatives
#8
G T Sigurdson, R J Robbins, T M Collins, M M Giusti
Colorants derived from nature are increasingly popular due to consumer demand. Anthocyanins are a class of naturally occurring pigments that produce red-purple-blue hues in nature, especially when interacting with metal ions and co-pigments. The role of various acylations of cyanidin (Cy) derivatives on color expression and stability of Al(3+) and Fe(3+) chelates in pH 6-7 were evaluated by spectrophotometry (380-700nm) and colorimetry (CIE-L(∗)a(∗)b(∗)) during dark, ambient storage (48h). Increased substitution generally increased λmax of Cy chelates: malonic acid monoacylation<triglycosylated Cy<Cy monoacylated with hydroxycinnamic acids<diacylated Cy...
April 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27976011/sinapic-acid-as-inhibitor-of-the-sos-response-in-eschericha-coli-induced-by-ciprofloxacin
#9
L C Nascimento da Silva, S R Madsen, C Crocoll, B Halkier, A Løbner-Olesen
No abstract text is available yet for this article.
December 2016: Planta Medica
https://www.readbyqxmd.com/read/27910755/comparison-of-the-composition-and-antioxidant-activities-of-phenolics-from-the-fruiting-bodies-of-cultivated-asian-culinary-medicinal-mushrooms
#10
Shaoling Lin, Lai Tsz Ching, Xinxin Ke, Peter Chi Keung Cheung
The composition profile and the antioxidant properties of phenolics in water extracts obtained from the fresh fruiting bodies of 4 common cultivated Asian edible mushrooms-Agrocybe aegerita, Pleurotus ostreatus, P. eryngii, and Pholiota nameko were compared. The water extract from A. aegerita (AaE) had the highest total phenolic content (TPC) at 54.18 ± 0.27 gallic acid equivalents (μmol/L)/mg extract (P < 0.05), as measured by the Folin-Ciocalteu method, and consisted of the largest number (including gallic acid, protocatechuic acid, chlorogenic acid, ferulic acid, and sinapic acid) and total amounts of phenolic acids identified by Fourier transform-ion cyclotron resonance mass spectrometry...
2016: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/27888422/enzymatic-activities-for-lignin-monomer-intermediates-highlight-the-biosynthetic-pathway-of-syringyl-monomers-in-robinia-pseudoacacia
#11
Jun Shigeto, Yukie Ueda, Shinya Sasaki, Koki Fujita, Yuji Tsutsumi
Most of the known 4-coumarate:coenzyme A ligase (4CL) isoforms lack CoA-ligation activity for sinapic acid. Therefore, there is some doubt as to whether sinapic acid contributes to sinapyl alcohol biosynthesis. In this study, we characterized the enzyme activity of a protein mixture extracted from the developing xylem of Robinia pseudoacacia. The crude protein mixture contained at least two 4CLs with sinapic acid 4-CoA ligation activity. The crude enzyme preparation displayed negligible sinapaldehyde dehydrogenase activity, but showed ferulic acid 5-hydroxylation activity and 5-hydroxyferulic acid O-methyltransferase activity; these activities were retained in the presence of competitive substrates (coniferaldehyde and 5-hydroxyconiferaldehyde, respectively)...
January 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/27880018/drought-related-secondary-metabolites-of-barley-hordeum-vulgare-l-leaves-and-their-mqtls
#12
Anna Piasecka, Aneta Sawikowska, Anetta Kuczyńska, Piotr Ogrodowicz, Krzysztof Mikołajczak, Karolina Krystkowiak, Kornelia Gudyś, Justyna Guzy-Wróbelska, Paweł Krajewski, Piotr Kachlicki
Determination of the role of plant secondary metabolites in stress conditions is problematic due to diversity of their structures and complexity of interdependence with different biological pathways. Correlation of the metabolomic data with the genetic background provides essential information on the features of metabolites. LC-MS analysis of leaf metabolites from 100 barley recombinant inbred lines (RILs) revealed that 98 traits among 135 detected phenolic and terpenoid compounds significantly changed the level as a result of drought stress...
November 23, 2016: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/27876336/inhibition-of-protein-glycation-antioxidant-and-antiproliferative-activities-of-carpobrotus-edulis-extracts
#13
Jawhar Hafsa, Khaoula Mkadmini Hammi, Med Raâfet Ben Khedher, Med Ali Smach, Bassem Charfeddine, Khalifa Limem, Hatem Majdoub
Carpobrotus edulis is an important South African medicinal plants used as a food and therapeutic agent in traditional medicine. The aim of this study was to determine the phytochemical content, antioxidant, antiglycation and cytotoxic effect against Human Colon Cancer Cell Line (HCT-116) of aqueous and ethanol-water (1:1v/v) extracts of Carpobrotus edulis.The content of total phenolics and flavonoids in aqueous and ethanol-water extract were 151.99μg and 66.35μg gallic acid equivalents/mg of dry extract, and 38...
December 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27815071/cloning-and-functional-characterization-of-a-phenolic-acid-decarboxylase-from-the-liverwort-conocephalum-japonicum
#14
Shuai Gao, Hai-Na Yu, Yi-Feng Wu, Xin-Yan Liu, Ai-Xia Cheng, Hong-Xiang Lou
Some commercially important vinyl derivatives are produced by the decarboxylation of phenolic acids. Enzymatically, this process can be achieved by phenolic acid decarboxylases (PADs), which are able to act on phenolic acid substrates such as ferulic and p-coumaric acid. Although many microbial PADs have been characterized, little is known regarding their plant homologs. Transcriptome sequencing in the liverworts has identified seven putative PADs, which share a measure of sequence identity with microbial PADs, but are typically much longer proteins...
November 1, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27798665/active-sites-of-reduced-epidermal-fluorescence1-ref1-isoforms-contain-amino-acid-substitutions-that-are-different-between-monocots-and-dicots
#15
Tagnon D Missihoun, Simeon O Kotchoni, Dorothea Bartels
Plant aldehyde dehydrogenases (ALDHs) play important roles in cell wall biosynthesis, growth, development, and tolerance to biotic and abiotic stresses. The Reduced Epidermal Fluorescence1 is encoded by the subfamily 2C of ALDHs and was shown to oxidise coniferaldehyde and sinapaldehyde to ferulic acid and sinapic acid in the phenylpropanoid pathway, respectively. This knowledge has been gained from works in the dicotyledon model species Arabidopsis thaliana then used to functionally annotate ALDH2C isoforms in other species, based on the orthology principle...
2016: PloS One
https://www.readbyqxmd.com/read/27719885/contribution-of-individual-phenolics-to-antioxidant-activity-and-in-vitro-digestibility-of-wild-rices-zizania-aquatica-l
#16
Daniela Sumczynski, Eva Kotásková, Jana Orsavová, Pavel Valášek
Zizania aquatica L. was analysed for total flavonoids, phenolics and HPLC profile in both free and bound phenolic fractions. The highest content of flavonoids (378-455mgRE/kg) was detected in bound fractions, while the highest polyphenols content (1061-2988mgGAE/kg) was determined in free fractions. Additionally, predominant phenolics were identified. To understand the contribution of individual phenolics to an antioxidant activity their mutual correlations were evaluated. Regarding free flavonoids, the main contributors to an antioxidant activity (r>0...
March 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27677829/plant-phenyl-propanoids-conjugated-silver-nanoparticles-from-edible-plant-suaeda-maritima-l-dumort-inhibit-proliferation-of-k562-human-myeloid-leukemia-cells
#17
Narendran Rajendran, Shankar Subramaniam, Mamilla R Charan Raja, Pemaiah Brindha, Santanu Kar Mahapatra, Aravind Sivasubramanian
The present study portrays the isolation of four phenylpropanoids - ferulic acid (FA), sinapic acid (SA), caffeic acid (CA), and chlorogenic acid (CHA) from the water extract of Suaeda maritima (L.) Dumort, a phytochemically less explored Indian medicinal plant. Further, synthesis and characterization of silver and gold nanoparticles using the isolated phenylpropanoids were done. The silver nanoparticles synthesized from S. maritima water extract along with silver nano-conjugated forms of the isolated compounds exhibited appreciable anti-leukemic activity against K562 cells (human myeloid leukemia)...
September 28, 2016: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/27664833/sinapic-acid-mitigates-gentamicin-induced-nephrotoxicity-and-associated-oxidative-nitrosative-stress-apoptosis-and-inflammation-in-rats
#18
Mushtaq Ahmad Ansari, Mohammad Raish, Ajaz Ahmad, Sheikh Fayaz Ahmad, Shahid Mudassar, Kazi Mohsin, Faiyaz Shakeel, Hesham M Korashy, Saleh A Bakheet
AIMS: In this study, the renoprotective functions of sinapic acid (SA), a polyphenol, on gentamicin-induced nephrotoxicity and the pathway that mediates this function were examined. MAIN METHODS: Kidney function markers (serum urea, uric acid, creatinine, LDH, and γ-GGT) and histopathological examinations of the kidney were used to evaluate gentamicin-induced nephrotoxicity. Oxidative stress markers (lipid peroxidation and total protein), renal nitrosative stress (nitric oxide), antioxidant enzymes (catalase and NP-SH), inflammation markers (NF-κB [p65], TNF-α, IL-6, and myeloperoxidase [MPO]), and apoptotic markers (caspase 3, Bax, and Bcl-2) were also assessed...
November 15, 2016: Life Sciences
https://www.readbyqxmd.com/read/27649250/phenolic-compounds-and-antioxidant-activity-of-phalaenopsis-orchid-hybrids
#19
Truong Ngoc Minh, Do Tan Khang, Phung Thi Tuyen, Luong The Minh, La Hoang Anh, Nguyen Van Quan, Pham Thi Thu Ha, Nguyen Thanh Quan, Nguyen Phu Toan, Abdelnaser Abdelghany Elzaawely, Tran Dang Xuan
Phalaenopsis spp. is the most commercially and economically important orchid, but their plant parts are often left unused, which has caused environmental problems. To date, reports on phytochemical analyses were most available on endangered and medicinal orchids. The present study was conducted to determine the total phenolics, total flavonoids, and antioxidant activity of ethanol extracts prepared from leaves and roots of six commercial hybrid Phalaenopsis spp. Leaf extracts of "Chian Xen Queen" contained the highest total phenolics with a value of 11...
September 14, 2016: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/27641473/effect-of-fermentation-and-cooking-on-soluble-and-bound-phenolic-profiles-of-finger-millet-sour-porridge
#20
Molly Gabaza, Habtu Shumoy, Maud Muchuweti, Peter Vandamme, Katleen Raes
The aim of this study was to evaluate the soluble and bound phenolic content of finger millet and the impact of process induced changes on phenolic profiles of their sour porridge. Finger millet porridge and intermediate products were collected from four groups of households in the Hwedza communal area, Zimbabwe, after which soluble and bound phenolic compounds (PC) including condensed tannins (CT) were quantified. Bound PC and CT contributed 95% of the total PC and CT. The CT were only detected in the red varieties...
October 12, 2016: Journal of Agricultural and Food Chemistry
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