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https://www.readbyqxmd.com/read/29149996/coupling-of-two-centrifugeless-ultrasound-assisted-dispersive-solid-liquid-phase-microextractions-as-a-highly-selective-clean-and-efficient-method-for-determination-of-ultra-trace-amounts-of-non-steroidal-anti-inflammatory-drugs-in-complicated-matrices
#1
Somayeh Arghavani-Beydokhti, Maryam Rajabi, Alireza Asghari
In this work, a new, simple, rapid, and environmentally friendly method with a high sample clean-up capability termed as centrifugeless ultrasound-assisted dispersive micro solid-phase extraction coupled with salting-out ultrasound-assisted liquid-liquid microextraction based on solidification of a floating organic droplet followed by high performance liquid chromatography is introduced for the first time. In this method, the three non-steroidal anti-inflammatory drugs diclofenac, ibuprofen, and mefenamic acid are first extracted based on an effective nanoadsorbent named as the layered double hydroxide-carbon nanotube nanohybrid...
January 2, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29139309/polyphenolic-characterisation-of-plant-mixture-lisosan%C3%A2-reduction-and-its-hypocholesterolaemic-effect-in-high-fat-diet-fed-mice
#2
Rossella Russo, Laura Pucci, Lucia Giorgetti, Július Árvay, Francesco Vizzarri, Vincenzo Longo, Luisa Pozzo
Lisosan® Reduction is a plant mixture produced from powder of fermented Triticum aestivum (Lisosan® G), Desmodium adscendens, Malus domestica, Picrorhiza kurroa and Hordeum vulgare. The aim of this study was to characterise the phenolic profile of Lisosan® Reduction and to evaluate the effects of aqueous extract on mice fed a high fat diet (HFD). Syringic acid, trans sinapic acid and neochlorogenic acid were identified by HPLC-DAD to be the dominant polyphenols of Lisosan® Reduction, followed by vitexin, trans p-coumeric acid and trans ferulic acid...
November 15, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29137712/hydrophilic-interaction-liquid-chromatography-of-hydroxy-aromatic-carboxylic-acid-positional-isomers
#3
Ashley E Richardson, Neil D Danielson
Hydrophilic interaction liquid chromatography (HILIC) has become increasingly popular as an alternative to reversed phase LC due to its ease of separating complex polar compound mixtures and the compatibility of the mobile phase with mass spectrometry (MS). Using a plain silica column (150  mm × 4.6  mm), we have shown a mixture containing three hydroxybenzoic acid isomers plus syringic and vanillic acid and three hydroxycinnamic acid isomers plus ferulic and sinapic acid can be separated using a mobile phase comprised of 90% acetonitrile (MeCN) and 10% 20 mM ammonium acetate at pH 6 in under 45 min...
December 15, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29117733/analysis-of-17-polyphenolic-compounds-in-organic-and-conventional-legumes-by-high-performance-liquid-chromatography-diode-array-detection-hplc-dad-and-evaluation-of-their-antioxidant-activity
#4
Federica Giusti, Giovanni Caprioli, Massimo Ricciutelli, Elisabetta Torregiani, Sauro Vittori, Gianni Sagratini
Consumption of legumes has become popular among health-conscious consumers due to the high levels of nutrients such as proteins, dietary fibres, minerals, vitamins and micronutrients like polyphenols. Ten legumes cultivars organically and conventionally grown were compared regarding their chemical profiles in terms of total phenolic content (TPC), total anthocyanin content (TAC), total flavonoid content (TFC) and their antioxidant capacity. The chemical profiles (i.e. free phenolics and anthocyanins) were determined with aid of new high-performance liquid chromatography-diode array detection (HPLC-DAD) method able to identify two individual anthocyanins and 15 polyphenols...
November 8, 2017: International Journal of Food Sciences and Nutrition
https://www.readbyqxmd.com/read/29104269/characterization-of-free-conjugated-and-bound-phenolic-acids-in-seven-commonly-consumed-vegetables
#5
Yuan Gao, Shuai Ma, Meng Wang, Xiao-Yuan Feng
Phenolic acids are thought to be beneficial for human health and responsible for vegetables' health-promoting properties. Free, conjugated, and bound phenolic acids of seven commonly consumed vegetables, including kidney bean, cow pea, snow pea, hyacinth bean, green soy bean, soybean sprouts and daylily, from the regions of Beijing, Hangzhou, and Guangzhou, were identified and quantified by ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). Three vegetables, namely green soy bean, soybean sprouts, and daylily (Hemerocallisfulva L...
November 1, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29081461/rapid-lc-ms-determination-of-acromelic-acids-a-and-b-toxic-constituents-of-the-mushroom-paralepistopsis-acromelalga
#6
Naoki Yoshioka, Hitoshi Ouchi, Toshiyuki Kan, Masashi Yoshida, Motoyuki Nomura
A rapid LC-MS method was developed for determination of acromelic acids A and B, which are toxic constituents of Paralepistopsis acromelalga (=Clitocybe acromelalga), in mushroom samples. Acromelic acids were extracted twice with 50% methanol and the extract was passed through a syringe filter, and then analyzed by LC-MS. The LC separation was performed on a multi-mode ODS column. The recoveries of acromelic acids A and B spiked into blank mushroom samples at 2.5 μg/g were 93 and 74%, respectively. This method was applied to the remaining mushroom sample from a food poisoning case...
2017: Shokuhin Eiseigaku Zasshi. Journal of the Food Hygienic Society of Japan
https://www.readbyqxmd.com/read/29069980/immunotherapeutic-effect-of-bcg-polysaccharide-nucleic-acid-powder-on-mycobacterium-tuberculosis-infected-mice-using-microneedle-patches
#7
Qinying Yan, Houming Liu, Zhigang Cheng, Yun Xue, Zhide Cheng, Xuyong Dai, Wanshui Shan, Fan Chen
Polysaccharide nucleic acid fractions of bacillus Calmette-Guérin, termed BCG-PSN, have traditionally been used as immunomodulators in the treatment of dermatitis and allergic diseases. While the sales of injectable BCG-PSN have shown steady growth in recent years, no reports of using BCG-PSN powder or its immunotherapeutic effects exist. Here, BCG-PSN powder was applied directly to the skin to evaluate the immunotherapeutic effects on mice infected with Mycobacterium tuberculosis (MTB). In total, 34 μg of BCG-PSN powder could be loaded into a microneedle patch (MNP)...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/29052962/bacterial-catabolism-of-lignin-derived-aromatics-new-findings-in-a-recent-decade
#8
Naofumi Kamimura, Kenji Takahashi, Kosuke Mori, Takuma Araki, Masaya Fujita, Yudai Higuchi, Eiji Masai
Lignin is the most abundant phenolic polymer; thus, its decomposition by microorganisms is fundamental to carbon cycling on earth. Lignin breakdown is initiated by depolymerization catalyzed by extracellular oxidoreductases secreted by white-rot basidiomycetous fungi. On the other hand, bacteria play a predominant role in the mineralization of lignin-derived heterogeneous low-molecular-weight aromatic compounds. The outline of bacterial catabolic pathways for lignin-derived bi- and monoaryls are typically composed of the following sequential steps: i) funneling of a wide variety of lignin-derived aromatics into vanillate and syringate, ii) O demethylation of vanillate and syringate to form catecholic derivatives, and iii) aromatic ring-cleavage of the catecholic derivatives to produce tricarboxylic acid cycle intermediates...
October 20, 2017: Environmental Microbiology Reports
https://www.readbyqxmd.com/read/29048336/proanthocyanidin-characterization-antioxidant-and-cytotoxic-activities-of-three-plants-commonly-used-in-traditional-medicine-in-costa-rica-petiveria-alliaceae-l-phyllanthus-niruri-l-and-senna-reticulata-willd
#9
Mirtha Navarro, Ileana Moreira, Elizabeth Arnaez, Silvia Quesada, Gabriela Azofeifa, Diego Alvarado, Maria J Monagas
The phenolic composition of aerial parts from Petiveria alliaceae L., Phyllanthus niruri L. and Senna reticulata Willd., species commonly used in Costa Rica as traditional medicines, was studied using UPLC-ESI-TQ-MS on enriched-phenolic extracts. Comparatively, higher values of total phenolic content (TPC), as measured by the Folin-Ciocalteau method, were observed for P. niruri extracts (328.8 gallic acid equivalents/g) than for S. reticulata (79.30 gallic acid equivalents/g) whereas P. alliaceae extract showed the lowest value (13...
October 19, 2017: Plants (Basel, Switzerland)
https://www.readbyqxmd.com/read/29037664/simultaneous-optimization-of-the-ultrasound-assisted-extraction-for-phenolic-compounds-content-and-antioxidant-activity-of-lycium-ruthenicum-murr-fruit-using-response-surface-methodology
#10
Shasha Chen, Zhi Zeng, Na Hu, Bo Bai, Honglun Wang, Yourui Suo
Lycium ruthenicum Murr. (LR) is a functional food that plays an important role in anti-oxidation due to its high level of phenolic compounds. This study aims to optimize ultrasound-assisted extraction (UAE) of phenolic compounds and antioxidant activities of obtained extracts from LR using response surface methodology (RSM). A four-factor-three-level Box-Behnken design (BBD) was employed to discuss the following extracting parameters: extraction time (X1), ultrasonic power (X2), solvent to sample ratio (X3) and solvent concentration (X4)...
March 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29034200/promising-effect-of-rosa-damascena-extract-on-high-fat-diet-induced-nonalcoholic-fatty-liver
#11
Ida Davoodi, Roja Rahimi, Mohammad Abdollahi, Fatemeh Farzaei, Mohammad Hosein Farzaei, Zahra Memariani, Fariba Najafi
NAFLD is a chronic liver disease that affects a high proportion of the world's population which causes metabolic and hepatic damages. Rosa damascena Mill is traditionally used as a dietary supplement for liver disorders. This study was carried out to determine the beneficial effect of standardized extract of R. damascena on animal model of nonalcoholic fatty liver disease (NAFLD). NAFLD was induced by high-fat diet (HFD) in Wistar rats. HFD rats showed an increase (p < 0.05) in the plasma lipid levels of total cholesterol (TC), triglyceride (TG), low-density lipoprotein (LDL), and reduced the high-density lipoprotein (HDL) levels...
October 2017: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/28993145/an-inhibitory-mechanism-of-action-of-a-novel-syringic-acid-derivative-on-%C3%AE-melanocyte-stimulating-hormone-%C3%AE-msh-induced-melanogenesis
#12
Yoon Ju Jeong, Jae-Young Lee, Jino Park, Soo Nam Park
AIMS: To report the effects of a novel syringic-acid derivative, (R)-ethyl-2-acetamido-3-(4-hydroxy-3,5-dimethoxybenzoylthio)propanoate (EABTO), on melanin synthesis and to identify its mechanism of action in B16F1 melanoma cells. METHODS: The effects of EABTO on melanin synthesis in B16F1 cells and human epidermal melanocytes and the influence on cell-free tyrosinase activity were evaluated. EABTO-induced cellular signaling cascades were studied by western blotting...
December 15, 2017: Life Sciences
https://www.readbyqxmd.com/read/28953245/potential-use-of-plant-waste-from-the-moth-orchid-phalaenopsis-sogo-yukidian-v3-as-an-antioxidant-source
#13
Truong Ngoc Minh, Phung Thi Tuyen, Do Tan Khang, Nguyen Van Quan, Pham Thi Thu Ha, Nguyen Thanh Quan, Yusuf Andriana, Fan Xinyan, Truong Mai Van, Tran Dang Khanh, Tran Dang Xuan
This research was conducted to exploit the waste of used plant parts from the widely marketed moth orchid cultivar (Phalaenopsis Sogo Yukidian "V3"). Various extracts of roots, stems, and leaves were evaluated for total phenolics, total flavonoids, and antioxidant capacity. The bound extract from stems contained the highest total phenolics (5.092 ± 0.739 mg GAE (gallic acid equivalent)/g DW (dry weight)). The maximum total flavonoids (2.218 ± 0.021 mg RE (rutin equivalent)/g DW) were found in the hexane extract of leaves...
September 27, 2017: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28930578/identification-of-bioactive-glucose-lowering-compounds-of-methanolic-extract-of-hodgsonia-heteroclita-fruit-pulp
#14
Talambedu Usha, Arvind Kumar Goyal, Derhasat Narzary, Lokesh Prakash, Gulshan Wadhwa, Dinesh Babu, Divya Shanmugarajan, Sushil Kumar Middha
We have investigated the anti-oxidative and glucose-lowering effects of 70% methanolic extract of H. heteroclita fruit pulp (MHE). Anti-oxidative property of MHE was assessed by free radical scavenging assays and compound level screening by LC-MS profiling. In silico analysis and in vivo preclinical validation were also performed using molecular docking and alloxan-induced diabetic model, respectively. MHE showed high anti-oxidant activity in DPPH radical scavenging assay with an IC50 of 0.37 μg/mL. The LC-MS profile of MHE substantiated the presence of p-hydroxy acids including benzoic, salicylic, p-coumaric, o-coumaric, caffeic, protocatechuic, gentisic, 2,4-dihydroxybenzoic, gallic, vanillic, syringic, and ferulic acids...
January 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28927288/a-new-sesquiterpene-from-kalimeris-integrifolia
#15
Guo-Kai Wang, Zheng Wang, Yang Yu, Nan Zhang, Zhong-Yu Zhou, Gang Wang, Jin-Song Liu
A new sesquiterpene kalinturoside A (1), and 17 known compounds friedelan-3-ol (2), 24-ethyl-5a-cholesta-7, 22(E)-dien-3-one (3), friedelin (4), syringaresinol (5), α-spinasterol (6), ciwujiatone (7), syringic acid (8), scopoletin (9), apocynin (10), 1-(3-hydroxy-4, 5-dimethoxyphenyl)ethan-1-one (11), apigenin (12), 5-hydroxymethylfurfural (13), stigmasterol-3-O-β-d-glucopy-ranoside (14), bidenoside C (15), citrusin (16), irioresinol A (17) and syringaresinol-4-O-β-d-glucopyranoside (18) were isolated from the herbs of Kalimeris integrifolia...
September 19, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28926983/expression-of-the-grape-vasts19-gene-in-arabidopsis-improves-resistance-to-powdery-mildew-and-botrytis-cinerea-but-increases-susceptibility-to-pseudomonas-syringe-pv-tomato-dc3000
#16
Yaqiong Wang, Dejun Wang, Fan Wang, Li Huang, Xiaomin Tian, Steve van Nocker, Hua Gao, Xiping Wang
Stilbene synthase (STS) is a key enzyme that catalyzes the biosynthesis of resveratrol compounds and plays an important role in disease resistance. The molecular pathways linking STS with pathogen responses and their regulation are not known. We isolated an STS gene, VaSTS19, from a Chinese wild grape, Vitis amurensis Rupr. cv. "Tonghua-3", and transferred this gene to Arabidopsis. We then generated VaSTS19-expressing Arabidopsis lines and evaluated the functions of VaSTS19 in various pathogen stresses, including powdery mildew, B...
September 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28926682/development-of-a-simple-and-valid-method-for-the-trace-determination-of-phthalate-esters-in-human-plasma-using-dispersive-liquid-liquid-microextraction-coupled-with-gc-ms
#17
Karim Ebrahim, Parinaz Poursafa, Mohammad Mehdi Amin
A new method was developed for the trace determination of phthalic acid esters in plasma using dispersive liquid-liquid microextraction and gas chromatography with mass spectrometry analysis. Plasma proteins were efficiently precipitated by trichloroacetic acid and then a mixture of chlorobenzene (as extraction solvent) and acetonitrile (as dispersive solvent) rapidly injected to clear supernatant using a syringe. After the centrifuging, chlorobenzene were sedimented in the bottom of the test tube. 1 μL of this sedimented phase was injected into the gas chromatograph for phthalic acid esters analysis...
September 19, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28917736/off-line-microextraction-by-packed-sorbent-combined-with-on-solid-support-derivatization-and-gc-ms-application-for-the-analysis-of-five-pyrethroid-metabolites-in-urine-samples
#18
Anna Klimowska, Bartosz Wielgomas
A novel, fast and eco-friendly analytical method using microextraction by packed sorbent coupled to large volume injection-gas chromatography-mass spectrometry (MEPS-LVI-GC-MS) was developed for the determination of five pyrethroid metabolites (cis-2,2-dimethyl-3-(2-chloro-3,3,3-trifluoro-1-propenyl)-cyclopropanecarboxylic acid, cis/trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane-1-carboxylic acids, cis-(2,2-dibromovinyl)-2,2-dimethylcyclopropane-1-carboxylic acid and 3-phenoxybenzoic acid) in human urine...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28883300/irrigation-effectiveness-of-continuous-ultrasonic-irrigation-system-an-ex-vivo-study
#19
Ahmed Jamleh, Hideaki Suda, Carlos G Adorno
This study evaluated the irrigation extrusion and smear layer (SL) removal of continuous ultrasonic irrigation (CUI). Forty root canals were shaped, embedded in warm sterile saline agar colored with 1% acid red, and distributed into four groups; three groups had the final irrigation sequence of sodium hypochlorite and EDTA solutions performed by using syringe irrigation (SI), EndoVac (EV), and CUI, respectively. Group 4 had the canals ultrasonically irrigated with saline (CUIS). Irrigant extrusion was verified by a color change of the agar...
September 7, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28880243/simultaneous-determination-of-seven-phenolic-acids-in-rat-plasma-using-uhplc-esi-ms-ms-after-oral-administration-of-echinacea-purpurea-extract
#20
Yan Du, Zhibin Wang, Libo Wang, Mingjie Gao, Liqian Wang, Chunli Gan, Chunjuan Yang
A rapid and sensitive Ultra High Performance Liquid Chromatography Electrospray Ionization Tandem Mass Spectrometry (UHPLC-ESI-MS/MS) method was developed and validated to simultaneously determine the concentration of seven phenolic acids (syringic acid, ferulic acid, caffeic acid, vanillic acid, p-coumaric acid, 3,4-dihydroxybenzoic acid and 4-hydroxybenzoic acid) in rat plasma after oral administration of Echinacea purpurea extract. After mixing with the internal standard (IS), butylparaben, plasma samples were prepared by liquid-liquid extraction with ethyl acetate...
September 7, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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