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Syringic acid

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https://www.readbyqxmd.com/read/29763357/comparative-evaluation-of-endovac-and-conventional-irrigating-syringe-on-apical-extrusion-in-primary-molars-an-in-vitro-study
#1
Nilaya Reddy Venumbaka, Porselvi Baskaran, Jayanthi Mungara, Madhan Chenchugopal, Arun Elangovan, Poornima Vijayakumar
OBJECTIVES: The present study was undertaken to evaluate and compare the apical extrusion of irrigant and depth of irrigant penetration into dentine using the EndoVac irrigating system and manual irrigation system in primary molar teeth. STUDY DESIGN: Twenty five extracted primary molars satisfying the inclusion and exclusion criteria were divided into two groups with 29 roots in each group with an equal distribution of apical foramen area. The teeth were mounted in pre-weighed glass bottles and the canals were irrigated with 5...
May 15, 2018: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/29759243/polymer-brushes-containing-coordination-polymer-networks-on-monolith-for-rapid-solid-phase-extraction-of-multi-class-drug-residues-in-meat-samples
#2
Nan Li, Yue Song, Jing Qiu, Yue-Chen Zhao, Yong-Zhong Qian
A new solid phase extraction sorbent, based on poly(methacrylic acid) brushes-containing coordination polymer networks on monolith, was in-situ synthesized in a commercial syringe filter via surface grafting. Extraction of twenty model analytes, including nine sulfonamides, eight steroid hormones, and three quinolones, could be efficiently achieved by the monolithic hybrid filter due to multi-interactions. Through simple filtering steps, fast extraction (60 s of adsorption and 60 s of desorption) could be achieved...
August 1, 2018: Talanta
https://www.readbyqxmd.com/read/29752077/tissue-adhesive-rapid-forming-and-sprayable-ecm-hydrogel-via-recombinant-tyrosinase-crosslinking
#3
Su-Hwan Kim, Sang-Hyuk Lee, Ju-Eun Lee, Sung Jun Park, Kyungmin Kim, In Seon Kim, Yoon-Sik Lee, Nathaniel S Hwang, Byung-Gee Kim
We report on a tissue adhesive hydrogel based on novel recombinant tyrosinase mediated crosslinking. The adhesive hydrogels were fabricated by the site-directed coupling of tyramine-conjugated hyaluronic acid (HA_t, 1% w/v) and gelatin (3% w/v) (HG_gel) with novel tyrosinase derived from Streptomyces avermitilis (SA_Ty). The enzyme-based crosslinking by SA_Ty was fast, with less than 50 s for complete gelation, and the SA_Ty based crosslinking enhanced the physical properties and adhesive strength of the hydrogel significantly with the native tissue samples...
May 3, 2018: Biomaterials
https://www.readbyqxmd.com/read/29750329/biodegradation-of-lignin-monomers-vanillic-p-coumaric-and-syringic-acid-by-the-bacterial-strain-sphingobacterium-sp-hy-h
#4
Jinxing Wang, Jidong Liang, Sha Gao
Many bacterial strains have been demonstrated to biodegrade lignin for contaminant removal or resource regeneration. The goal of this study was to investigate the biodegradation amount and associated pathways of three lignin monomers, vanillic, p-coumaric, and syringic acid by strain Sphingobacterium sp. HY-H. Vanillic, p-coumaric, and syringic acid degradation with strain HY-H was estimated as 88.71, 76.67, and 72.78%, respectively, after 96 h. Correspondingly, the same three monomers were associated with a COD removal efficiency of 87...
May 10, 2018: Current Microbiology
https://www.readbyqxmd.com/read/29740227/comparative-analysis-of-bioactive-phenolic-compounds-composition-from-26-medicinal-plants
#5
Oksana Sytar, Irene Hemmerich, Marek Zivcak, Cornelia Rauh, Marian Brestic
Bioactive phenolic compounds are powerful antioxidants in traditionally used medicinal and industrial crop plants and have attracted increased interest in the last years in their application and role in non-destructive methodology for pre-screening analysis of some stress factors. In this study the qualitative target was linked with future possible applications of received data for improving non-destructive methodology as well as for improving existing knowledge regarding antioxidant content in some plant species...
May 2018: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/29739608/phenolic-compounds-as-beneficial-phytochemicals-in-pomegranate-punica-granatum-l-peel-a-review
#6
Balwinder Singh, Jatinder Pal Singh, Amritpal Kaur, Narpinder Singh
Pomegranate peel (PoP), a juice byproduct often considered as a waste, comprises nearly around 30-40% portion of the fruit. Phenolic compounds (one class of bioactive phytochemicals) are primarily concentrated in the peel portion of pomegranate fruit. In PoP, the main phenolic compounds reported in the literature include flavonoids (anthocyanins such as pelargonidin, delphinidin, cyanidin along with their derivatives and anthoxanthins such as catechin, epicatechin and quercetin), tannins (ellagitannins and ellagic acid derivatives such as punicalagin, punicalin and pedunculagin) and phenolic acids (such as chlorogenic, caffeic, syringic, sinapic, p-coumaric, ferulic, ellagic, gallic and cinnamic acid)...
September 30, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29738464/allelopathic-responses-of-rice-seedlings-under-some-different-stresses
#7
Tran Dang Khanh, La Hoang Anh, La Tuan Nghia, Khuat Huu Trung, Pham Bich Hien, Do Minh Trung, Tran Dang Xuan
The objective of this study was to evaluate the allelopathic responses of rice seedlings under submergence stress at different temperatures (10, 25, 32, and 37 °C). The results showed that a wide range of allelopathic responses of rice seedlings depended on varieties and stress conditions, with temperature was being a key factor. It showed that the extracts of rice seedlings induced significant suppression on lettuce and radish seedling germination, but had negligible allelopathic effects on growth of barnyardgrass, whilst the emergence and growth of natural weeds was stimulated...
May 8, 2018: Plants (Basel, Switzerland)
https://www.readbyqxmd.com/read/29736887/transfer-behavior-of-the-weakly-acidic-bcs-class-ii-drug-valsartan-from-the-stomach-to-the-small-intestine-during-fasted-and-fed-states
#8
Rania Hamed, Sabreen Hasan Alnadi
The objective of this study was to investigate the transfer behavior of the weakly acidic BCS class II drug valsartan from the stomach to the small intestine during fasted and fed states. An in vitro transfer model previously introduced by Kostewicz et al. (J Pharm Pharmacol 56(1):43-51, 2004) based on a syringe pump and a USP paddle apparatus was used to determine the concentration profiles of valsartan in the small intestine. Donor phases of simulated gastric fluid during fasted (FaSSGF) and fed (FeSSGF) states were used to predisperse Diovan® tablets (160 mg valsartan)...
May 7, 2018: AAPS PharmSciTech
https://www.readbyqxmd.com/read/29733951/bioinspired-co-crystals-of-imatinib-providing-enhanced-kinetic-solubility
#9
Maude Reggane, Johannes Wiest, Marco Saedtler, Cornelius Harlacher, Marcus Gutmann, Sven H Zottnick, Philippe Piechon, Ina Dix, Klaus Müller-Buschbaum, Ulrike Holzgrabe, Lorenz Meinel, Bruno Galli
Realizing the full potential of co-crystals enhanced kinetic solubility demands a comprehensive understanding of the mechanisms of dissolution, phase conversion, nucleation and crystal growth, and of the complex interplay between the active pharmaceutical ingredient (API), the coformer and co-existing forms in aqueous media. One blueprint provided by nature to keep poorly water-soluble bases in solution is the complexation with phenolic acids. Consequently, we followed a bioinspired strategy for the engineering of co-crystals of a poorly water-soluble molecule - Imatinib - with a phenolic acid, syringic acid (SYA)...
May 4, 2018: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/29691745/identification-of-phytotoxins-in-different-plant-parts-of-brassica-napus-and-their-influence-on-mung-bean
#10
Azhar Mehmood, Muhammad Naeem, Farhan Khalid, Yousaf Saeed, Tasawer Abbas, Khawar Jabran, Muhammad Aqeel Sarwar, Asif Tanveer, Muhammad Mansoor Javaid
Plants in Brassica genus have been found to possess strong allelopathic potential. They may inhibit seed germination and emergence of subsequent crops following them in a rotation system. Series of laboratory and greenhouse experiments were conducted to determine the allelopathic impacts of Brassica napus L. against mung bean. We studied (1) the effects of aqueous extract (5%) of different plant parts (root, stem, leaf, flower, and whole plant) of B. napus, (2) the effects of leaf and flower extracts of B. napus at 0, 1, 2, 3, and 4% concentrations, and (3) the effect of residues of different B...
April 24, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29682801/dynamic-hyaluronan-hydrogels-with-temporally-modulated-high-injectability-and-stability-using-a-biocompatible-catalyst
#11
Junzhe Lou, Fang Liu, Christopher D Lindsay, Ovijit Chaudhuri, Sarah C Heilshorn, Yan Xia
Injectable and biocompatible hydrogels have become increasingly important for cell transplantation to provide mechanical protection of cells during injection and a stable scaffold for cell adhesion post-injection. Injectable hydrogels need to be easily pushed through a syringe needle and quickly recover to a gel state, thus generally requiring noncovalent or dynamic cross-linking. However, a dilemma exists in the design of dynamic hydrogels: hydrogels with fast exchange of cross-links are easier to eject using less force, but lack long-term stability; in contrast, slow exchange of cross-links improves stability, but compromises injectability and thus the ability to protect cells under flow...
April 23, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29677369/targeted-drug-delivery-in-the-suprachoroidal-space-by-swollen-hydrogel-pushing
#12
Jae Hwan Jung, Patcharin Desit, Mark R Prausnitz
Purpose: The purpose is to target model drug particles to the posterior region of the suprachoroidal space (SCS) of the eye controlled via pushing by hydrogel swelling. Methods: A particle formulation containing 1% hyaluronic acid (HA) with fluorescent polymer particles and a hydrogel formulation containing 4% HA were introduced in a single syringe as two layers without mixing, and injected sequentially into the SCS of the rabbit eye ex vivo and in vivo using a microneedle...
April 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29674021/solid-phase-microextraction-method-using-a-novel-polystyrene-oleic-acid-imidazole-polymer-in-micropipette-tip-of-syringe-system-for-speciation-and-determination-of-antimony-in-environmental-and-food-samples
#13
Abdul Haleem Panhwar, Mustafa Tuzen, Baki Hazer, Tasneem Gul Kazi
A simple, rapid and sensitive solid phase microextraction method was used for the speciation of inorganic antimony (Sb) by using a novel synthesized polymeric material in micropipette tip of syringe system. In present methodology, the specie of Sb (III) made hydrophobic complex with diethyl dithiocarbamate (DDTC) at pH 5.5 and subsequently adsorbed on polystyrene oleic acid imidazole polymer (POIP), whereas Sb(V) did not made complex and adsorbed on the polymer, remained in aqueous solutions. The strategy of multivariate was carried out to screen out the different variables and assessed the optimum values of their experimental values for the extraction efficiency of analyte...
July 1, 2018: Talanta
https://www.readbyqxmd.com/read/29665961/orchestration-of-the-expression-of-the-laccase-multigene-family-in-white-rot-basidiomycete-trametes-hirsuta-072-evidences-of-transcription-level-subfunctionalization
#14
Konstantin V Moiseenko, Daria V Vasina, Katerina T Farukshina, Olga S Savinova, Olga A Glazunova, Tatiana V Fedorova, Tatiana V Tyazhelova
Laccase (benzenediol:oxygen oxidoreductase, EC 1.10.3.2) is an enzyme that has been studied for over 100 y and is present in virtually all fungi. As increasing numbers of fungal genomes have been sequenced, it has become apparent that the laccase genes in white-rot fungi commonly form multigene families consisting of many nonallelic genes. Although a number of reports focussing on laccase gene expression in different fungal species were published over the decades, the fundamental questions of why fungi need such a redundant array of genes and how they manage this array to perform biological function(s) remain far from answered...
May 2018: Fungal Biology
https://www.readbyqxmd.com/read/29658045/potential-of-borojoa-patinoi-cuatrecasas-water-extract-to-inhibit-nosocomial-antibiotic-resistant-bacteria-and-cancer-cell-proliferation-in-vitro
#15
Clemencia Chaves-López, Donatella Usai, Matthew Gavino Donadu, Annalisa Serio, Robert Tulio González-Mina, Maria Chiara Simeoni, Paola Molicotti, Stefania Zanetti, Antonio Pinna, Antonello Paparella
Borojó (Borojoa patinoi Cuatrec.) is a fruit used in Colombian traditional medicine with supposed antihypertensive, antitumoral, diuretic, healing, immunological, anti-inflammatory and aphrodisiac effects. To explore the relative merits in terms of biological activities of borojó aqueous extract (BAE), we investigated in vitro its antimicrobial activity on nosocomial pathogenic and multidrug resistant (MDR) strains of Pseudomonas aeruginosa (6), Staphylococcus aureus (1) and Candida species (6), as well as its cytotoxicity on human conjunctive Wong-Kilbourne derivative (WKD) cells and Caco-2 cells from heterogeneous human epithelial colorectal adenocarcinoma...
April 16, 2018: Food & Function
https://www.readbyqxmd.com/read/29645049/the-inhibitory-effect-of-manuka-honey-on-human-colon-cancer-hct-116-and-lovo-cell-growth-part-1-the-suppression-of-cell-proliferation-promotion-of-apoptosis-and-arrest-of-the-cell-cycle
#16
Sadia Afrin, Francesca Giampieri, Massimiliano Gasparrini, Tamara Y Forbes-Hernández, Danila Cianciosi, Patricia Reboredo-Rodriguez, Adolfo Amici, Josè L Quiles, Maurizio Battino
Numerous investigations have been made on plant phenolic compounds and cancer prevention in recent decades. Manuka honey (MH) represents a good source of phenolic compounds such as luteolin, kaempferol, quercetin, gallic acid and syringic acid. The aim of this work was to evaluate the chemopreventive effects of MH on human colon cancer HCT-116 and LoVo cells. Both cells were exposed to different concentrations of MH (0-20 mg mL-1 for HCT-116 cells and 0-50 mg mL-1 for LoVo cells) for 48 h to measure apoptosis and cell cycle arrest as well as apoptosis and cell cycle regulatory gene and protein expression...
April 12, 2018: Food & Function
https://www.readbyqxmd.com/read/29642867/antiproliferative-activities-and-phenolic-acid-content-of-water-and-ethanolic-extracts-of-the-powdered-formula-of-houttuynia-cordata-thunb-fermented-broth-and-phyllanthus-emblica-linn-fruit
#17
Piyawan Kumnerdkhonkaen, Somprasong Saenglee, Md Ali Asgar, Gulsiri Senawong, Kanoknan Khongsukwiwat, Thanaset Senawong
BACKGROUND: Houttuynia cordata Thunb. and Phyllanthus emblica Linn. are native plants with medicinal and nutritive significance in Asia. The present study was aimed at evaluating antiproliferative effects on human cancer cell lines and identifying the phenolic acid composition of water and ethanolic extracts of the powdered formula of H. cordata fermented broth and P. emblica fruit. METHODS: Anticancer activity of the extracts was evaluated against HeLa, HT29, HCT116, MCF7 and Jurkat cells using an MTT assay and flow cytometric analysis of apoptosis induction and cell cycle arrest...
April 11, 2018: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29642422/chemical-characterization-of-an-encapsulated-red-wine-powder-and-its-effects-on-neuronal-cells
#18
Diego Rocha-Parra, Jorge Chirife, Clara Zamora, Sonia de Pascual-Teresa
Red wine polyphenols are known for their implications for human health protection, although they suffer from high instability. For this reason, a red wine powder was prepared by freeze-drying encapsulation in maltodextrin/arabic gum matrix, and its composition was determined by means of high-performance liquid chromatography coupled quadrupole time-of-flight mass spectrometry (HPLC-MS-QTOF). More than thirty polyphenols, including anthocyanins, flavanols, flavonols, phenolic acids and stilbenoids, were identified...
April 7, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29628246/preparation-of-elastic-diglycolamic-acid-modified-chitosan-sponges-and-their-application-to-recycling-of-rare-earth-from-waste-phosphor-powder
#19
Ruixi Bai, Fan Yang, Yang Zhang, Zhigang Zhao, Qiuxia Liao, Peng Chen, Panpan Zhao, Wanghuan Guo, Chunqing Cai
Inspired by the phenomenon of sponges soaking up water, a novel syringe-like adsorption device used diglycolamic-acid modified chitosan sponges (CSs-DGAA) as adsorbents is reported for recycling of rare-earth elements (REEs) by Squeezing & Soaking (S&S) operation. Integrating the elasticity of sponges and selective extraction ability of diglycolamic acid groups, the new device can efficiently recycle REEs from aqueous solutions. This device only needs 10 min to achieve adsorption equilibrium; squeezing the water from the sponges achieves solid-liquid separation...
June 15, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29622199/phenolic-profile-and-effect-of-growing-area-on-pistacia-lentiscus-seed-oil
#20
Faten Mezni, Awatef Slama, Riadh Ksouri, Ghaith Hamdaoui, Mohamed Larbi Khouja, Abdelhamid Khaldi
In this investigation, we aimed to study, for the first time, the phenolic composition of Pistacia lentiscus seed oils from different growing areas. Extraction of the phenolic fraction from oils was done by methanol/water. Phenolic profiles were determined using chromatographic analysis by High Performance Liquid Chromatography (HPLC-DAD/MSD) and its quantification was done using an internal standard which is unidentified in the studied oil (syringic acid). Forty phenolic compounds were quantified and only eighteen of them were identified...
August 15, 2018: Food Chemistry
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