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Syringic acid

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https://www.readbyqxmd.com/read/28449398/feeding-induced-phenol-production-in-capsicum-annuum-l-influences-spodoptera-litura-f-larval-growth-and-physiology
#1
Vijaya Movva, Usha Rani Pathipati
We studied the role of induced plant phenols as a defense response to insect herbivory. Phenolic compounds were induced in Capsicum annuum L., the source of many culinary peppers, after feeding by different stages of the insect pest, Spodoptera litura F. The phenols were identified and quantified using high performance liquid chromatography (HPLC) and effects produced by these phenols on larval development were studied. Vanillic acid was identified in plants challenged by second, fourth, and fifth instar larvae, but not in plants challenged by third instar nor unchallenged plants...
May 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28444960/in-vivo-absorption-and-metabolism-of-leptosperin-and-methyl-syringate-abundantly-present-in-manuka-honey
#2
Akari Ishisaka, Shinichi Ikushiro, Mie Takeuchi, Yukako Araki, Maki Juri, Yui Yoshiki, Yoshichika Kawai, Toshio Niwa, Noritoshi Kitamoto, Toshiyuki Sakaki, Hirohito Ishikawa, Yoji Kato
SCOPE: Manuka honey, which shows strong non-peroxide-dependent antibacterial activity, contains unique components, such as methyl syringate 4-O-β-D-gentiobioside (leptosperin) and its aglycone, methyl syringate (MSYR). To determine the potential for biological activity evoked by the ingestion of leptosperin and MSYR, we investigated the absorption and metabolism of these components in manuka honey. METHODS AND RESULTS: The incubation of MSYR with liver microsomes or S9 fractions in vitro resulted in the formation of MSYR-glucuronide (MSYR-GA), MSYR-sulfate (MSYR-S), and syringic acid as metabolites...
April 26, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28416417/in-vitro-evaluation-of-nasogastric-ng-tube-delivery-performance-of-esomeprazole-magnesium-delayed-release-capsules
#3
Alicia Hoover, Dajun Sun, Hong Wen, Wenlei Jiang, Minglei Cui, Xiaojian Jiang, David Keire, Changning Guo
Enteral feeding tubes are used to deliver food or drugs to patients that cannot swallow. To deliver delayed-release drugs that are formulated as enteric coated granules to these patients via feeding tubes requires that they be suspended in water prior to administration. Importantly, the suspension of enteric granules in water of varying pH can cause damage to the enteric coating and affect the bioavailability of the drug. Here, analytical methods for testing acid resistance stability and particle size distribution (PSD) of esomeprazole granules were utilized to monitor the integrity of the granule enteric coating after water pretreatment and delivery through an oral syringe and nasogastric (NG) tube...
April 14, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28401458/purification-characterization-and-thermostability-improvement-of-xylanase-from-bacillus-amyloliquefaciens-and-its-application-in-pre-bleaching-of-kraft-pulp
#4
Sharad Kumar, Izharul Haq, Jyoti Prakash, Sudheer Kumar Singh, Shivaker Mishra, Abhay Raj
Xylanases have important industrial applications but are most extensively utilized in the pulp and paper industry as a pre-bleaching agent. We characterized a xylanase from Bacillus amyloliquefaciens strain SK-3 and studied it for kraft pulp bleaching. The purified enzyme had a molecular weight of ~50 kDa with optimal activity at pH 9.0 and 50 °C. The enzyme showed good activity retention (85%) after 2 h incubation at 50 °C and pH 9.0. This enzyme obeyed Michaelis-Menten kinetics with regard to beechwood xylan with K m and V max values of 5...
May 2017: 3 Biotech
https://www.readbyqxmd.com/read/28391725/identification-and-in-vitro-antioxidant-activities-of-phenolic-compounds-isolated-from-cynoglossum-cheirifolium-l
#5
Bensaid Ilhem, Atik Bekkara Fawzia, El Haci Imad Abdelhamid, Belarbi Karima, Beddou Fawzia, Bekhechi Chahrazed
In an extensive search for bioactive compounds from plant sources, the quantitative and qualitative characterisation of the compounds present in Cynoglossum cheirifolium extracts was studied. Total phenolic and flavonoid contents were determined by spectrophotometric techniques. In vitro antioxidant and radical scavenging profiling was determined through DPPH(•) scavenging activity and Ferric reducing antioxidant power (FRAP). Our study showed that leaves produce more phenolic compounds, followed by flowering aerial part...
April 9, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28391711/phenolic-content-and-antioxidant-properties-of-seeds-from-different-grape-cultivars-grown-in-iran
#6
Vasigheh Sadat Mirbagheri, Ebrahim Alizadeh, Mostafa Yousef Elahi, Sedigheh Esmaeilzadeh Bahabadi
This study investigated the antioxidant activity and phenolic composition of seed extracts from three grape cultivars grown in Iran. Folin Ciocalteu method was used for the determination of the total phenolic contents and GC-MS was used for the analysis of phenolic compositions. 1,1-diphenyl-2-picrylhydrazyl (DPPH) method was used to evaluate the antioxidant activity. The highest and the lowest total phenolic contents of seed extract were found in the black and green grape, respectively. The content of individual phenols such as Frulic acid, Gentistic acid, Syringic acid, (+) Catechin, Chlorogenic acid and (-)- Epicatchin gallate was cultivars dependent...
April 10, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28390277/enhancement-in-multiple-lignolytic-enzymes-production-for-optimized-lignin-degradation-and-selectivity-in-fungal-pretreatment-of-sweet-sorghum-bagasse
#7
Vartika Mishra, Asim K Jana, Mithu Maiti Jana, Antriksh Gupta
The objective of this work was to study the increase in multiple lignolytic enzyme productions through the use of supplements in combination in pretreatment of sweet sorghum bagasse (SSB) by Coriolus versicolor such that enzymes act synergistically to maximize the lignin degradation and selectivity. Enzyme activities were enhanced by metallic salts and phenolic compound supplements in SSF. Supplement of syringic acid increased the activities of LiP, AAO and laccase; gallic acid increased MnP; CuSO4 increased laccase and PPO to improve the lignin degradations and selectivity individually, higher than control...
March 27, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28373573/structure-of-aryl-o-demethylase-offers-molecular-insight-into-a-catalytic-tyrosine-dependent-mechanism
#8
Amanda C Kohler, Matthew J L Mills, Paul D Adams, Blake A Simmons, Kenneth L Sale
Some strains of soil and marine bacteria have evolved intricate metabolic pathways for using environmentally derived aromatics as a carbon source. Many of these metabolic pathways go through intermediates such as vanillate, 3-O-methylgallate, and syringate. Demethylation of these compounds is essential for downstream aryl modification, ring opening, and subsequent assimilation of these compounds into the tricarboxylic acid (TCA) cycle, and, correspondingly, there are a variety of associated aryl demethylase systems that vary in complexity...
April 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28361245/detoxification-of-sap-from-felled-oil-palm-trunks-for-the-efficient-production-of-lactic-acid
#9
Balakrishnan Kunasundari, Takamitsu Arai, Kumar Sudesh, Rokiah Hashim, Othman Sulaiman, Natra Joseph Stalin, Akihiko Kosugi
The availability of fermentable sugars in high concentrations in the sap of felled oil palm trunks and the thermophilic nature of the recently isolated Bacillus coagulans strain 191 were exploited for lactic acid production under non-sterile conditions. Screening indicated that strain 191 was active toward most sugars including sucrose, which is a major component of sap. Strain 191 catalyzed a moderate conversion of sap sugars to lactic acid (53%) with a productivity of 1.56 g/L/h. Pretreatment of oil palm sap (OPS) using alkaline precipitation improved the sugar fermentability, providing a lactic acid yield of 92% and productivity of 2...
March 30, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/28342478/interactions-between-the-tetrasodium-salts-of-edta-and-1-hydroxyethane-1-1-diphosphonic-acid-with-sodium-hypochlorite-irrigants
#10
Philippe Biel, Dirk Mohn, Thomas Attin, Matthias Zehnder
INTRODUCTION: A clinically useful all-in-one endodontic irrigant with combined proteolytic and decalcifying properties is still elusive. In this study, the chemical effects of dissolving the tetrasodium salts of 1-hydroxyethane 1,1-diphosphonic acid (Na4HEDP) or Na4EDTA directly in sodium hypochlorite (NaOCl) irrigants in polypropylene syringes were assessed during the course of 1 hour. METHODS: The solubility of the salts in water was determined. Their compatibility with 1% and 5% NaOCl was measured by iodometric titration and in a calcium complexation experiment by using a Ca(2+)-selective electrode...
April 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28338616/a-comparative-study-of-phenols-in-apulian-italian-wines
#11
Andrea Ragusa, Carla Centonze, Maria E Grasso, Maria F Latronico, Pier F Mastrangelo, Federica Sparascio, Francesco P Fanizzi, Michele Maffia
Nutraceutics is a growing research field in which researchers study and attempt to improve the biological properties of metabolites in food. Wine is one of the most consumed products in the world and contains a plethora of molecules biologically relevant to human health. In this article, several polyphenols with potential antioxidant activity were measured in wines from Apulia, in Southeast Italy. Hydroxytyrosol, gallic and syringic acids, luteolin, quercetin, and trans-resveratrol were identified and quantified by HPLC...
March 24, 2017: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28335967/an-innovative-monolithic-zwitterionic-stationary-phase-for-the-separation-of-phenolic-acids-in-coffee-bean-extracts-by-capillary-electrochromatography
#12
Adele Murauer, Rania Bakry, Herwig Schottenberger, Christian Huck, Markus Ganzera
A methacrylate based monolith, containing the innovative zwitterionic monomer (3-allyl-1-imidazol)propane sulfonate, was prepared in 100 μm I.D. silica capillaries by UV initiated photo-polymerization. Composition of the porogen, i.e. a mixture of 1-propanol, 1,4 butanediol and water, was of great importance to obtain a homogeneous monolith with satisfactory permeability and good electrochromatographic performance. Morphology of the stationary phase was studied in Scanning Electron Microscopy and IR experiments, which revealed a good attachment to the capillary wall, flowthrough-pores in the range of 0...
April 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28328707/the-sterility-of-partially-used-hyaluronic-acid-fillers-after-long-storage
#13
Mohammed Al-Haddab, Amr Abduljabbar, Ali Al-Somaily
BACKGROUND: Hyaluronic acid (HA) gel fillers represent most soft tissue augmentation procedures currently used, because they have lower rates of complications compared with other materials. Many patients do not consume an entire syringe of filler but may require a retouch or intermittent augmentation after some time. The remaining material is commonly stored in a specific environment for reuse by the same patient. OBJECTIVE: There are an insufficient number of recommendations concerning the safety of storing and reusing dermal fillers in the literature because of the paucity of studies...
March 21, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28326842/two-new-terpenoids-from-kalimeris-indica
#14
Guo-Kai Wang, Yang Yu, Zheng Wang, Bai-Xiang Cai, Zhong-Yu Zhou, Gang Wang, Jin-Song Liu
A new nor-sesquiterpene kalimeristone A (1), a new nor-triterpenoid kalimerislactone B (2) and eight known compounds 7-hydroxy-4'methoxyisoflavone (3), episyringaresinol (4), epipinoresinol (5), rhamnetin (6), vanillin (7), p-hydroxybenzaldehyde (8), syringic acid (9) and 3, 4-dihydroxybenzaldehyde (10) were isolated from the herbs of Kalimeris indica. The structures of these compounds were elucidated using spectroscopic techniques, such as NMR and MS. All of the compounds were isolated from this genus for the first time...
March 22, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28287476/absorption-metabolism-and-excretion-of-cranberry-poly-phenols-in-humans-a-dose-response-study-and-assessment-of-inter-individual-variability
#15
Rodrigo P Feliciano, Charlotte E Mills, Geoffrey Istas, Christian Heiss, Ana Rodriguez-Mateos
The beneficial health effects of cranberries have been attributed to their (poly)phenol content. Recent studies have investigated the absorption, metabolism and excretion of cranberry (poly)phenols; however, little is known about whether they follow a dose response in vivo at different levels of intake. An acute double-blind randomized controlled trial in 10 healthy men with cranberry juices containing 409, 787, 1238, 1534 and 1910 mg total (poly)phenols was performed. Blood and urine were analyzed by UPLC-Q-TOF-MS...
March 11, 2017: Nutrients
https://www.readbyqxmd.com/read/28285179/expanding-the-feruloyl-esterase-gene-family-of-aspergillus-niger-by-characterization-of-a-feruloyl-esterase-faec
#16
Adiphol Dilokpimol, Miia R Mäkelä, Sadegh Mansouri, Olga Belova, Martin Waterstraat, Mirko Bunzel, Ronald P de Vries, Kristiina S Hildén
A feruloyl esterase (FAE) from Aspergillus niger N402, FaeC was heterologously produced in Pichia pastoris X-33 in a yield of 10mg/L. FaeC was most active at pH 7.0 and 50°C, and showed broad substrate specificity and catalyzed the hydrolysis of methyl 3,4-dimethoxycinnamate, ethyl ferulate, methyl ferulate, methyl p-coumarate, ethyl coumarate, methyl sinapate, and methyl caffeate. The enzyme released both ferulic acid and p-coumaric acid from wheat arabinoxylan and sugar beet pectin (up to 3mg/g polysaccharide), and acted synergistically with a commercial xylanase increasing the release of ferulic acid up to six-fold...
July 25, 2017: New Biotechnology
https://www.readbyqxmd.com/read/28281361/simultaneous-determination-and-anti-inflammatory-effects-of-four-phenolic-compounds-in-dendrobii-herba
#17
Sae-Rom Yoo, Soo-Jin Jeong, Na-Ri Lee, Hyeun-Kyoo Shin, Chang-Seob Seo
Dendrobii Herba, a traditional Korean medicine, is used for treating atrophic gastritis, diabetes and cardiovascular diseases. Phytochemical studies of Dendrobium species and their compounds have been conducted. However, the pharmaceutical effects of these compounds have not yet been elucidated. We performed quantitative determination of four phenolic compounds, - (1) 4-hydroxybenzoic acid, (2) vanillic acid (3) syringic acid and (4) ferulic acid - in Dendrobii Herba using high-performance liquid chromatography coupled with a photodiode array detector...
March 10, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28264523/a-kinetic-approach-in-the-evaluation-of-radical-scavenging-efficiency-of-sinapic-acid-and-its-derivatives
#18
Neda Nićiforović, Tomaž Polak, Damjan Makuc, Nataša Poklar Ulrih, Helena Abramovič
A kinetic approach was used to determine the radical scavenging activities of sinapic acid and its derivatives: sinapine, 4-vinylsyringol, syringic acid, syringaldehyde, and ethyl, propyl and butyl sinapate. The responses were expressed as rates of 2,2-diphenyl-1-picrylhydrazyl radical (DPPH˙) scavenging (RS), superoxide radical (O₂˙(-)) scavenging (RFF), and β-carotene bleaching in the emulsion system (RB). For RS and RB, the esters of sinapic acid showed the highest responses while, for RFF, this was seen for syringic acid...
February 28, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28262421/improvement-of-selective-lignin-degradation-in-fungal-pretreatment-of-sweet-sorghum-bagasse-using-synergistic-cuso4-syringic-acid-supplements
#19
Vartika Mishra, Asim K Jana, Mithu Maiti Jana, Antriksh Gupta
Sweet sorghum bagasse (SSB) generated in large quantities could be hydrolyzed to sugar and then fermented to green fuels. The hydrolysis of SSB polysaccharides interlocked in recalcitrant lignin network is the major problem. Pretreatment of SSB in SSF by using Coriolus versicolor with CuSO4-syringic acid supplements for effects on production of ligninocellulolytic enzymes, lignin degradation and selectivity values (SV) were studied. C. versicolor was selected based on high ligninolytic and low cellulolytic abilily...
May 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28257665/bioassay-guided-fractionation-of-ethyl-acetate-extract-from-armillaria-mellea-attenuates-inflammatory-response-in-lipopolysaccharide-lps-stimulated-bv-2-microglia
#20
Yan Geng, Shuiling Zhu, Peng Cheng, Zhen-Ming Lu, Hong-Yu Xu, Jin-Song Shi, Zheng-Hong Xu
BACKGROUND: Armillaria mellea (A. mellea) is a traditional Chinese medicinal and edible mushroom, which is proved to possess a lot of biological activities, including anti-oxidation, immunopotentiation, anti-vertigo and anti-aging activities. However, little information is available in regard to its neuroprotection activity in inflammation-mediated neurodegenerative diseases. PURPOSE: We have found that A. mellea has an anti-inflammatory activity in LPS-induced RAW264...
March 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
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