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https://www.readbyqxmd.com/read/28032102/evaluation-of-oxalic-acid-treatments-against-the-mite-varroa-destructor-and-secondary-effects-on-honey-bees-apis-mellifera
#1
Noureddine Adjlane, El-Ounass Tarek, Nizar Haddad
BACKGROUND: The Varroa destructor varroasis is a very serious parasite of honeybee Apis mellifera. The objective of this study was to evaluate the effectiveness of Varroa treatment using organic acid (oxalic acid) in Algeria identifying its side effects on bee colonies. METHODS: Treatment was conducted in one apiary consisting 30 colonies kept in Langstroth hives kind. Oxalic acid dripped directly on bees 5ml of this solution of oxalic acid per lane occupied by a syringe...
December 2016: Journal of Arthropod-borne Diseases
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
#2
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/27979256/synthesis-and-in-vitro-antioxidant-and-antimicrobial-studies-of-novel-structured-phosphatidylcholines-with-phenolic-acids
#3
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/27979114/wheat-bread-enriched-with-green-coffee-in-vitro-bioaccessibility-and-bioavailability-of-phenolics-and-antioxidant-activity
#4
Michał Świeca, Urszula Gawlik-Dziki, Dariusz Dziki, Barbara Baraniak
The potential bioaccessibility and bioavailability of phenolics, caffeine and antioxidant activity of wheat bread enriched with green coffee were studied. Supplementation enhanced nutraceutical potential by improving phenolic content and lipid protecting capacity. The simulated-digestion-released phenolics (mainly caffeic acid, syringic acid and vanillic acid) from bread, also caused significant qualitative changes (chlorogenic acids were cleaved and significant amounts of caffeic acid and ferulic acid were determined)...
April 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27960275/phenolics-of-selected-cranberry-genotypes-vaccinium-macrocarpon-ait-and-their-antioxidant-efficacy
#5
Gihan Abeywickrama, Samir C Debnath, Priyatharini Ambigaipalan, Fereidoon Shahidi
Free, esterified, and bound phenolic fractions of berries from five different cranberry genotypes and two market samples were evaluated for their total phenolic, flavonoid, and monomeric anthocyanin contents as well as their antioxidant efficacy using TEAC, ORAC, DPPH radical, reducing power, and ferrous ion chelation capacity assays. HPLC-MS/MS analysis was performed for two of the rich sources (Pilgrim and wild clone NL2) of phenolics and high antioxidant activity. Among the genotypes, Pilgrim showed the highest phenolic and flavonoid contents and wild clones NL3 and NL2 showed the highest monomeric anthocyanin and proanthocyanidin content, respectively...
December 14, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27914721/corrigendum-to-reversal-of-ethanol-induced-hepatotoxicity-by-cinnamic-and-syringic-acids-in-mice-food-chem-toxicol-98-pt-b-2016-oct-25-119-126
#6
Sheng-Lei Yan, Zhi-Hong Wang, Hsiu-Fang Yen, Yi-Ju Lee, Mei-Chin Yin
No abstract text is available yet for this article.
January 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/27914260/the-extent-of-fermentative-transformation-of-phenolic-compounds-in-the-bioanode-controls-exoelectrogenic-activity-in-a-microbial-electrolysis-cell
#7
Xiaofei Zeng, Maya A Collins, Abhijeet P Borole, Spyros G Pavlostathis
Phenolic compounds in hydrolysate/pyrolysate and wastewater streams produced during the pretreatment of lignocellulosic biomass for biofuel production present a significant challenge in downstream processes. Bioelectrochemical systems are increasingly recognized as an alternative technology to handle biomass-derived streams and to promote water reuse in biofuel production. Thus, a thorough understanding of the fate of phenolic compounds in bioanodes is urgently needed. The present study investigated the biotransformation of three structurally similar phenolic compounds (syringic acid, SA; vanillic acid, VA; 4-hydroxybenzoic acid, HBA), and their individual contribution to exoelectrogenesis in a microbial electrolysis cell (MEC) bioanode...
February 1, 2017: Water Research
https://www.readbyqxmd.com/read/27877156/a-chitosan-coating-containing-essential-oil-from-origanum-vulgare-l-to-control-postharvest-mold-infections-and-keep-the-quality-of-cherry-tomato-fruit
#8
Tainá A Barreto, Sonalle C A Andrade, Janeeyre F Maciel, Narciza M O Arcanjo, Marta S Madruga, Bruno Meireles, Ângela M T Cordeiro, Evandro L Souza, Marciane Magnani
The efficacy of an edible chitosan coating (CHI; 4 mg/mL) and Origanum vulgare L. essential oil (OVEO; 1.25 μL/mL) for maintaining the quality of cherry tomato fruit during storage at room (25°C; 12 days) and cold (12°C; 24 days) temperatures was assessed. CHI and OVEO in combination showed in vitro fungicidal effects against R. stolonifer and Aspergillus niger. CHI-OVEO coating reduced the incidence of black mold and soft rot caused by these fungi in artificially contaminated cherry tomato fruit during storage at both temperatures...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27862112/qualitative-and-quantitative-analysis-of-major-constituents-from-dazhu-hongjingtian-capsule-by-uplc-q-tof-ms-ms-combined-with-uplc-qqq-ms-ms
#9
Guang-Da Liu, Yi-Wu Zhao, Yan-Jing Li, Xue-Jing Wang, Hai-Hong Si, Wen-Zhe Huang, Zhen-Zhong Wang, Shi-Ping Ma, Wei Xiao
In this work, a sensitive and efficient method was established and validated for qualitative and quantitative analysis of major bioactive constituents in Dazhu Hongjingtian capsule by liquid chromatography tandem mass spectrometry (LC-MS). A total of 32 compounds were tentatively identified using ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UPLC/Q-TOF MS/MS). Furthermore, twelve constituents, namely gallic acid, 3,4-dihydroxybenzoic acid, salidroside, p-coumaric acid-4-O-β-D-glucopyranoside, bergeninum, 4-hydroxybenzoic acid, 4-hydroxyphenylacetic acid, syringate, 6''-O-galloylsalidroside, rhodiosin, rhodionin and kaempferol-7-O-α-L-rhamnoside, were simultaneously quantified by the developed ultra-performance liquid chromatography coupled with a triple quadrupole mass spectrometry (UPLC-QQQ-MS/MS) method in 9 min...
November 9, 2016: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/27860429/antibacterial-nanocomposite-bone-filler-based-on-silver-nanoparticles-and-polysaccharides
#10
Davide Porrelli, Andrea Travan, Turco Gianluca, Matteo Crosera, Borgogna Massimiliano, Ivan Donati, Sergio Paoletti, Gianpiero Adami, Eleonora Marsich
Injectable bone fillers represent an attractive strategy for the treatment of bone defects. These injectable materials should be biocompatible, capable of supporting cell growth and possibly able to exert antibacterial effects. In this work, nanocomposite microbeads based on alginate, chitlac, hydroxyapatite and silver nanoparticles were prepared and characterized. The dried microbeads displayed a rapid swelling in contact with simulated body fluid and maintained their integrity for more than 30 days. The evaluation of silver leakage from the microbeads showed that the antibacterial metal is slowly released in saline solution, with less than 6% of silver released after 1 week...
November 15, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27818668/an-approach-based-on-hplc-fingerprint-and-chemometrics-to-quality-consistency-evaluation-of-matricaria-chamomilla-l-commercial-samples
#11
Agnieszka Viapiana, Wiktoria Struck-Lewicka, Pawel Konieczynski, Marek Wesolowski, Roman Kaliszan
Chamomile has been used as an herbal medication since ancient times and is still popular because it contains various bioactive phytochemicals that could provide therapeutic effects. In this study, a simple and reliable HPLC method was developed to evaluate the quality consistency of nineteen chamomile samples through establishing a chromatographic fingerprint, quantification of phenolic compounds and determination of antioxidant activity. For fingerprint analysis, 12 peaks were selected as the common peaks to evaluate the similarities of commercial samples of chamomile obtained from different manufacturers...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27806168/safety-and-efficacy-of-a-volumizing-hyaluronic-acid-filler-for-treatment-of-hiv-associated-facial-lipoatrophy
#12
Derek Ho, Jared Jagdeo
Importance: Facial lipoatrophy (FLA) is associated with human immunodeficiency virus (HIV) disease and the use of highly active antiretroviral therapy. The condition is primarily characterized by facial volume loss that affects the contours of the cheeks, temples, and orbits and may negatively affect patients' adherence to highly active antiretroviral therapy, psychological health, and quality of life. A single treatment of hyaluronic acid (HA) filler, 20 mg/mL, may provide an immediate, natural-appearing facial enhancement outcome...
January 1, 2017: JAMA Dermatology
https://www.readbyqxmd.com/read/27793734/reversal-of-ethanol-induced-hepatotoxicity-by-cinnamic-and-syringic-acids-in-mice
#13
Sheng-Lei Yan, Zhi-Hong Wang, Hsiu-Fang Yen, Yi-Ju Lee, Mei-Chin Yin
Ethanol was used to induce acute hepatotoxicity in mice. Effects of cinnamic acid (CA) and syringic acid (SA) post-intake for hepatic recovery from alcoholic injury was investigated. Ethanol treated mice were supplied by CA or SA at 40 or 80 mg/kg BW/day for 5 days. Results showed that ethanol stimulated protein expression of CYP2E1, p47(phox), gp91(phox), cyclooxygenase-2 and nuclear factor kappa B in liver. CA or SA post-intake restricted hepatic expression of these molecules. Ethanol suppressed nuclear factor erythroid 2-related factor (Nrf2) expression, and CA or SA enhanced Nrf2 expression in cytosolic and nuclear fractions...
December 2016: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/27790915/exploring-the-colonic-metabolism-of-grape-and-strawberry-anthocyanins-and-their-in-vitro-apoptotic-effects-in-ht-29-colon-cancer-cells
#14
Maria-Carmen López de Las Hazas, Juana I Mosele, Alba Macià, Iziar A Ludwig, Maria-Jose' Motilva
Beneficial properties attributed to the intake of fruit and red wine have been associated with the presence of significant amounts of anthocyanins. However, their low absorption and consequent accumulation in the gut have generated the suspicion that colonic metabolites of anthocyanins are probably involved in their protective effects. Grape pomace and strawberries extracts, rich in malvidin- and pelargonidin-glucoside, respectively, were fermented in-vitro using human feces as microbial inoculum. After 8 h of anaerobic incubation, the anthocyanins were almost completely degraded while their microbial metabolites concentration was highest at 24 h...
October 28, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27777458/antioxidant-properties-and-uplc-ms-ms-profiling-of-phenolics-in-jacquemont-s-hazelnut-kernels-corylus-jacquemontii-and-its-byproducts-from-western-himalaya
#15
Ashish Kumar, Pawan Kumar, Rajkesh Koundal, Vijai K Agnihotri
A rapid and selective analytical method was developed to simultaneously quantify seven polyphenolic compounds (gallic acid, catechin, epicatechin, quercetin, kaempferol, syringic acid and p-coumaric acid). 15 phenolics of diverse groups in 80 % ethanolic extracts of jacquemont's hazelnut (Corylus jacquemontii) kernels and its byproducts from western Himalaya using ultra-performance liquid chromatography coupled with tandem mass spectrometry (UPLC-MS/MS) were identified. The developed analytical method showed excellent linearity, repeatability and accuracy...
September 2016: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/27777455/effect-of-microwave-drying-and-oven-drying-on-the-water-activity-color-phenolic-compounds-content-and-antioxidant-activity-of-coconut-husk-cocos-nucifera-l
#16
Lourdes Valadez-Carmona, Rosa María Cortez-García, Carla Patricia Plazola-Jacinto, Hugo Necoechea-Mondragón, Alicia Ortiz-Moreno
The coconut (Cocos nucifera L.) husk is basically composed by fiber and pith material and remained under-utilized. This is an important source of phenolic compounds that could be used as functional ingredients. The aim of this study was to determine the effect of: oven-drying (OD) and microwave drying (MD), on the water activity, color, phenolic compound content and antioxidant activity of coconut husk. The OD was performed at 60 °C for 12 h and MD was performed at 900 W for 10 min. The total phenolic content (TPC) in fresh coconut husk was 64...
September 2016: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/27775667/potential-anticancer-effects-of-polyphenols-from-chestnut-shell-extracts-modulation-of-cell-growth-and-cytokinomic-and-metabolomic-profiles
#17
Angela Sorice, Francesco Siano, Francesca Capone, Eliana Guerriero, Gianluca Picariello, Alfredo Budillon, Gennaro Ciliberto, Marina Paolucci, Susan Costantini, Maria Grazia Volpe
In this study, a hydroalcoholic chestnut shell extract was characterized and tested on six different human cell lines. Gallic, ellagic, and syringic acids were the most abundant non-condensed compounds in the chestnut extract, as determined by high performance liquid chromatography (HPLC). Tannins were mainly represented by condensed monomeric units of epigallocatechin and catechin/epicatechin. After 48 h of treatment, only the human hepatoblastoma HepG2 cells reached an inhibition corresponding to IC50 with an increase of apoptosis and mitochondrial depolarization...
October 21, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27771100/centrifuge-less-dispersive-liquid-liquid-microextraction-base-on-the-solidification-of-switchable-solvent-for-rapid-on-site-extraction-of-four-pyrethroid-insecticides-in-water-samples
#18
Lu Hu, Huazi Wang, Heng Qian, Chaoran Liu, Runhua Lu, Sanbing Zhang, Wenfeng Zhou, Haixiang Gao, Donghui Xu
An on-site dispersive liquid liquid microextraction base on the solidification of switchable solvent has been developed as a simple, rapid and eco-friendly sample extraction method for the fast determination of pyrethroid insecticides in aqueous samples using high-performance liquid chromatography with ultraviolet detection. In this extraction method, medium-chain saturated fatty acids (n≥10), which can rapidly solidify at low temperatures (<20°C), were investigated as switchable hydrophilic solvents...
October 11, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/27770779/eugenia-aurata-and-eugenia-punicifolia-hbk-inhibit-inflammatory-response-by-reducing-neutrophil-adhesion-degranulation-and-net-release
#19
Mírian Feliciano Costa, Tais Iara Jesus, Bruno Rafael Pereira Lopes, Célio Fernando Figueiredo Angolini, Abner Montagnolli, Lorraine de Paula Gomes, Gabriela Sterle Pereira, Ana Lucia Tasca Gois Ruiz, João Ernesto Carvalho, Marcos Nogueira Eberlin, Catarina Dos Santos, Karina Alves Toledo
BACKGROUND: Eugenia spp. are used in popular medicine in the treatment of pain, diabetes, intestinal disorders and cough. The aim of the work is to evaluate, ex vivo and in vivo, the anti-inflammatory activity of the hydroethanolic extracts of the leaves of Eugenia aurata (EA) and Eugenia punicifolia HBK (EP) upon neutrophils. METHODS: Ex vivo, isolated human neutrophils were sensitized by Eugenia extracts (0.1-1000 μg/mL) and stimulated by PMA. In these conditions, different neutrophil activities related to inflammatory process were measured: adhesion, degranulation and NET release...
October 22, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27770725/transformation-and-products-of-captopril-with-humic-constituents-during-laccase-catalyzed-oxidation-role-of-reactive-intermediates
#20
Penghui Du, He Zhao, Chenming Liu, Qingguo Huang, Hongbin Cao
The transformation of captopril (CAP), a widely-used thiol drug, was studied with the presence of dissolved model humic constituents (HCs) in a laccase-catalyzed system. Reaction products were analyzed by ultra-performance liquid chromatography coupled to time-of-flight mass spectrometry and condensed fukui function computation. CAP reacted with different model HCs in the enzymatic system for 1 h, ranging from 75% (syringic acid) to 96% (p-coumaric acid). In the absence of HCs, only 15% of CAP was removed through self-coupling...
October 14, 2016: Water Research
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