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https://www.readbyqxmd.com/read/28098940/characterization-of-date-deglet-nour-seed-free-and-bound-polyphenols-by-high-performance-liquid-chromatography-mass-spectrometry
#1
Sameera Sirisena, Dimitrios Zabaras, Ken Ng, Said Ajlouni
Date (Pheonix dactylifera L.) seeds are a valuable and abundant by-product with various potential food applications. Free polyphenols (FPPs) and bound polyphenols (BPPs) of date seeds from Deglet Nour variety grown in Australia were investigated using high-performance liquid chromatography-mass spectrometry. The FPP fraction contained the following main phenolic compounds per gram of date seed powder; procyanidin B1 (499.8 ± 7.8 μg), procyanidin B2 (288.6 ± 6.1 μg), catechin (167.6 ± 2.1 μg), epicatechin (39...
January 18, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28098848/identification-of-phenolic-compounds-from-hancornia-speciosa-apocynaceae-leaves-by-uhplc-orbitrap-hrms
#2
Katherine Xavier Bastos, Clarice Noleto Dias, Yuri Mangueira Nascimento, Marcelo Sobral da Silva, Silvana Maria Zucolotto Langassner, Ludger A Wessjohann, Josean Fechine Tavares
Apocynaceae is a botanical family distributed mainly in tropical and subtropical regions of the world. In Brazil, they comprise about 90 genera and 850 species, inhabiting various types of vegetation. Within this large botanical family, the genus Hancornia is considered monotypic, with its only species Hancornia speciosa Gomes. Antihypertensive, antidiabetic, and antiviral activities are described for this species. Despite having been the target of some studies, knowledge of its chemical composition is still limited...
January 15, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28098847/polish-yellow-sweet-clover-melilotus-officinalis-l-honey-chromatographic-fingerprints-and-chemical-markers
#3
Izabela Jasicka-Misiak, Ewa Makowicz, Natalia Stanek
A case study of Polish Melilotus officinalis honey was presented for the first time. Gas chromatography-mass spectrometry (GC-MS) (after steam distillation, Soxhlet extraction, ultrasonic solvent extraction, and solid phase extraction (SPE)) and targeted high performance liquid chromatography with a photodiode array detector (HPLC-PAD) were applied to determine the characteristic components of honey. While ubiquitous in most honeys, carbohydrates, terpene derivatives, and phenylacetic acid dominated in the Soxhlet extracts (25...
January 15, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28098506/capsicum-annuum-var-grossum-bell-pepper-inhibits-%C3%AE-secretase-activity-and-%C3%AE-amyloid1-40-aggregation
#4
Omodesola Oluwafisayo Ogunruku, Ganiyu Oboh, Sabina Passamonti, Federica Trammer, Aline Augusti Boligon
The deposition of amyloid protein as senile plaques is the major signature of Alzheimer's disease (AD). It is produced by the sequential cleavage of the amyloid precursor protein by secretases. Moreover, peppers are noted for their antiaging and cognitive enhancing properties. Thus, in this study, the effects of polyphenol-rich extracts from bell pepper on amyloid production and aggregation in vitro were investigated. Bell pepper (ripe and unripe) was extracted with methanol-1 N HCl (1:1 v/v). Thereafter, the inhibitory potentials of the extracts on β-secretase and β-amyloid1-40 aggregation were determined...
January 18, 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28098355/a-comparative-study-on-composition-and-antioxidant-activities-of-supercritical-carbon-dioxide-hexane-and-ethanol-extracts-from-blackberry-rubus-fruticosus-growing-in-poland
#5
Anna Wajs-Bonikowska, Agnieszka Stobiecka, Radosław Bonikowski, Agnieszka Krajewska, Magdalena Sikora, Józef Kula
BACKGROUND: Large quantities of blackberry seeds are produced as a pomace during the processing of juice and jam production - this by-product is a very interesting raw material both for oil manufacturing and as a source of bioactive compounds. In this work the composition, yield and antioxidant activity of three types of Rubus fructicosus pomace extracts isolated by liquid-extraction using solvents of different polarity, as well with supercritical CO2 fluid extraction have been compared...
January 18, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28098264/assessment-of-coulometric-array-electrochemical-detection-coupled-with-hplc-uv-for-the-absolute-quantitation-of-pharmaceuticals
#6
Michael B Hicks, Leah Salituro, Ian Mangion, Wes Schafer, Rong Xiang, Xiaoyi Gong, Christopher J Welch
The use of a coulometric array detector in tandem with HPLC-UV was evaluated for the absolute quantitation of pharmaceutical compounds without standards, an important capability gap in contemporary pharmaceutical research and development. The high-efficiency LC flow-through electrochemical detector system allows for the rapid evaluation of up to 16 different potentials, aiding in the identification and quantitation of electrochemically reactive species. By quantifying the number of electrons added or removed from an analyte during its passage through the detector, the number of moles of the analyte can be established...
January 18, 2017: Analyst
https://www.readbyqxmd.com/read/28098229/novel-synthesis-of-zno-pmma-nanocomposites-for-photocatalytic-applications
#7
Alessandro Di Mauro, Maria Cantarella, Giuseppe Nicotra, Giovanna Pellegrino, Antonino Gulino, Maria Violetta Brundo, Vittorio Privitera, Giuliana Impellizzeri
The incorporation of nanostructured photocatalysts in polymers is a strategic way to obtain novel water purification systems. This approach takes the advantages of: (1) the presence of nanostructured photocatalyst; (2) the flexibility of polymer; (3) the immobilization of photocatalyst, that avoids the recovery of the nanoparticles after the water treatment. Here we present ZnO-polymer nanocomposites with high photocatalytic performance and stability. Poly (methyl methacrylate) (PMMA) powders were coated with a thin layer of ZnO (80 nm thick) by atomic layer deposition at low temperature (80 °C)...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28097907/the-lignicolous-fungus-trametes-versicolor-l-lloyd-1920-a-promising-natural-source-of-antiradical-and-ache-inhibitory-agents
#8
Ljiljana Janjušević, Maja Karaman, Filip Šibul, Giuseppina Tommonaro, Carmine Iodice, Dragica Jakovljević, Boris Pejin
This study aimed to determine antiradical (DPPH(•) and (•)OH) and acetylcholinesterase (AChE) inhibitory activities along with chemical composition of autochtonous fungal species Trametes versicolor (Serbia). A total of 38 phenolic compounds with notable presence of phenolic acids were identified using HPLC/MS-MS. Its water extract exhibited the highest antiradical activity against (•)OH (3.21 μg/mL), among the rest due to the presence of gallic, p-coumaric and caffeic acids. At the concentration of 100 μg/mL, the same extract displayed a profound AChE inhibitory activity (60...
December 2017: Journal of Enzyme Inhibition and Medicinal Chemistry
https://www.readbyqxmd.com/read/28097757/palladium-catalyzed-hydrolytic-cleavage-of-aromatic-c-o-bonds
#9
Meng Wang, Hui Shi, Donald M Camaioni, Johannes A Lercher
Metallic palladium surfaces are highly selective in promoting the reductive hydrolysis of aromatic ethers in aqueous phase at relatively mild temperatures and pressures of H2 . At quantitative conversions, the selectivity to hydrolysis products of PhOR ethers was observed to range from 50 % (R=Ph) to greater than 90 % (R=n-C4 H9 , cyclohexyl, and PhCH2 CH2 ). By analysis of the evolution of products with and without incorporation of H2(18) O, the pathway was concluded to be initiated by palladium metal catalyzed partial hydrogenation of the phenyl group to an enol ether...
January 18, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28097599/biosynthesis-characterization-and-bioactivities-evaluation-of-silver-and-gold-nanoparticles-mediated-by-the-roots-of-chinese-herbal-angelica-pubescens-maxim
#10
Josua Markus, Dandan Wang, Yeon-Ju Kim, Sungeun Ahn, Ramya Mathiyalagan, Chao Wang, Deok Chun Yang
A facile synthesis and biological applications of silver (DH-AgNps) and gold nanoparticles (DH-AuNps) mediated by the aqueous extract of Angelicae Pubescentis Radix (Du Huo) are explored. Du Huo is a medicinal root belonging to Angelica pubescens Maxim which possesses anti-inflammatory, analgesic, and antioxidant properties. The absorption spectra of nanoparticles in varying root extract and metal ion concentration, pH, reaction temperatures, and time were recorded by ultraviolet-visible (UV-Vis) spectroscopy...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28096967/volatile-compounds-analysis-and-antioxidant-antimicrobial-and-cytotoxic-activities-of-mindium-laevigatum
#11
Abdolrasoul Haghir Ebrahimabadi, Mohammad Mahdi Movahedpour, Hossain Batooli, Ebrahim Haghir Ebrahimabadi, Asma Mazoochi, Maryam Mobarak Qamsari
OBJECTIVES: Mindium laevigatum is an endemic plant of Iran and Turkey and is widely used as blood purifier, antiasthma and antidyspnea in traditional medicine. Chemical composition of volatile materials of the plant and its antioxidant, antimicrobial and cytotoxic activities were reported in this study. MATERIALS AND METHODS: Simultaneous distillation-extraction (SDE) and GC-Mass-FID analysis were used for the plant volatile materials chemical composition identification and quantification...
December 2016: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28095842/cactus-opuntia-humifusa-water-extract-ameliorates-loperamide-induced-constipation-in-rats
#12
Sung Hee Han, Kyungmi Park, Eun Young Kim, So Hyun Ahn, Hyun-Sun Lee, Hyung Joo Suh
BACKGROUND: Korean cactus Cheonnyuncho (Opuntia humifusa) is rich in pectin, phenols, flavonoids, and minerals such as calcium and phosphorus. Some Koreans drink Cheonnyuncho juice prepared by grinding Cheonnyuncho with water. Cheonnyuncho is well known for its functional properties and antioxidant effects, but its effect on constipation has not been sufficiently studied. METHODS: Loperamide (2 mg/kg) was injected subcutaneously to induce constipation in rats. The animals were divided into four groups: a normal group (NOR), constipation control group (CON), and two constipation groups receiving the Cheonnyuncho extract (CE) at two different concentrations in drinking water, 3% (L-CE group) and 6% (H-CE group), for 25 days...
January 17, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28095737/induction-purification-and-characterization-of-a-thermo-and-ph-stable-laccase-from-abortiporus-biennis-j2-and-its-application-on-the-clarification-of-litchi-juice
#13
Liang Yin, Jiayin Ye, Sibi Kuang, Yanqing Guan, Rong You
A fungus J2 producing laccase with high yield was screened in soils and identified as Abortiporus biennis. The production of laccase was induced by 0.1 mM Cu(2+), 0.1 mM tannic acid, and 0.5 M ethanol. The laccase from Abortiporus biennis J2 was purified to electrophoretic homogeneity by a couple of steps. The N-terminal amino acid sequence of the enzyme was AIGPTADLNISNADI. The properties of the purified laccase were investigated. The result showed the laccase from Abortiporus biennis J2 is a thermo and pH stable enzyme...
January 18, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28095717/functional-constituents-of-wild-and-cultivated-goji-l-barbarum-l-leaves-phytochemical-characterization-biological-profile-and-computational-studies
#14
Andrei Mocan, Gökhan Zengin, Mario Simirgiotis, Michaela Schafberg, Adriano Mollica, Dan C Vodnar, Gianina Crişan, Sascha Rohn
Goji (Lycium barbarum L.) leaves are emphasized as a functional tea or as dietary supplements. The phenolic compound profile, antioxidant, enzyme inhibitory, antimicrobial, and antimutagenic activities of leaf extracts from two selected cultivars in comparison with wild-growing plants have been evaluated. HPLC-DAD/ESI-ToF-MS analysis revealed the presence of phenolic acids and flavonoids with chlorogenic acid and rutin being the dominant compounds in the cultivated plants, whereas rutin and kaempeferol-3-O-rutinoside for wild growing ones...
December 2017: Journal of Enzyme Inhibition and Medicinal Chemistry
https://www.readbyqxmd.com/read/28095510/screening-and-identifying-antioxidative-components-in-ginkgo-biloba-pollen-by-dpph-hplc-pad-coupled-with-hplc-esi-ms2
#15
Jiying Qiu, Xiangyan Chen, A I Netrusov, Qingxin Zhou, Danyang Guo, Xiaoyong Liu, Hailun He, Xue Xin, Yifen Wang, Leilei Chen
The Ginkgo biloba is one of ancient trees that exists from billions of years ago, its leaf and nut are used as herbs and foods in China, while so far its pollen does not have any application except pollination. In order to evaluate the antioxidant activity of Ginkgo biloba pollen, and rapidly screen its antioxidative components, the 1,1-diphenyl-2-picrylhydrazyl (DPPH) scavenging ability, total flavonoid, total phenol, and proanthocyanidin of Ginkgo biloba pollen were determined and compared with those of Ginkgo biloba leaf and nut, and the off-line DPPH-HPLC-PAD and HPLC-ESI-MS2 were applied for screening and identifying the antioxidant flavonoids in Ginkgo biloba pollen...
2017: PloS One
https://www.readbyqxmd.com/read/28095107/bioremediation-of-petroleum-wastewater-by-hyper-phenol-tolerant-bacillus-cereus-preliminary-studies-with-laboratory-scale-batch-process
#16
Aditi Banerjee, Aloke K Ghoshal
Petroleum wastewater samples from oil refinery and oil exploration site were treated by hyper phenol-tolerant Bacillus cereus (AKG1 and AKG2) in laboratory-scale batch process to assess their bioremediation efficacy. Quality of the treated wastewater samples were analyzed in terms of removal of chemical oxygen demand (COD), total organic carbon (TOC) and ammonium nitrogen content, and improvement of biological oxygen demand (BOD). Adaptation of these bacteria to the toxic environment through structural changes in their cell membranes was also highlighted...
January 17, 2017: Bioengineered
https://www.readbyqxmd.com/read/28094929/effect-of-in-vitro-gastrointestinal-digestion-on-encapsulated-and-nonencapsulated-phenolic-compounds-of-carob-ceratonia-siliqua-l-pulp-extracts-and-their-antioxidant-capacity
#17
Siham Ydjedd, Sihem Bouriche, Rubén López-Nicolás, Teresa Sánchez-Moya, Carmen Frontela-Saseta, Gaspar Ros-Berruezo, Farouk Rezgui, Hayette Louaileche, Djamel-Edine Kati
To determine the effect of in vitro gastrointestinal digestion on the release and antioxidant capacity of encapsulated and nonencapsulated phenolics carob pulp extracts, unripe and ripe carob pulp extracts were microencapsulated with polycaprolactone via double emulsion/solvent evaporation technique. Microcapsules' characterization was performed using scanning electron microscopy and Fourier transform infrared spectrometry analysis. Total phenolics and flavonoids content and antioxidant activities (ORAC, DPPH, and FRAP) were evaluated after each digestion step...
January 17, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28094470/mechanistic-studies-of-dmap-initiated-cyclohexene-oxide-co2-copolymerization-by-a-chromium-iii-pyridylamine-bis-phenolate-complex
#18
Christopher Mark Kozak, Katalin Devaine-Pressing
Chromium(III) chlorido amine-bis(phenolate) complexes paired with nucleophilic co-catalysts are a promising family of catalysts for the copolymerization of CO2 and epoxides to selectively produce polycarbonates with a very high degree of carbonate linkages. Single component catalyst systems can be prepared, where the neutral nucleophile, 4-dimethylaminopyridine (DMAP), is coordinated to the metal site to provide a stable octahedral CrIII complex. These complexes possess the potentional for both anionic (from the chlorido ligand) or neutral (DMAP) nucleophilic epoxide ring-opening during the proposed rate-determining initation step...
January 17, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28093828/a-systematic-review-on-ethnomedicines-of-anti-cancer-plants
#19
REVIEW
Akash Tariq, Sehrish Sadia, Kaiwen Pan, Ihteram Ullah, Sakina Mussarat, Feng Sun, Olatunji Olusanya Abiodun, Altanzagas Batbaatar, Zilong Li, Dagang Song, Qinli Xiong, Riaz Ullah, Suliman Khan, Buddha Bahadur Basnet, Brawin Kumar, Rabiul Islam, Muhammad Adnan
Cancer is a serious health problem and the second leading cause of death around the globe. Present review is an attempt to provide utmost information based on ethno-pharmacological and toxicological aspects of anti-cancer plants of the world. A total of 276 articles published in English journals and containing maximum ethnomedicinal information were reviewed using several data sources such as; Google scholar, Web of Science, Scopus, PubMed and floras of different countries. A total of 199 anti-cancer plants were recorded in present review and results indicated that traditional medicines are mostly being use in developing countries for cancer treatment...
January 17, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28093333/characterization-of-oral-disintegrating-film-of-peanut-skin-extract-potential-route-for-buccal-delivery-of-phenolic-compounds
#20
Marcela Tedesco, Carla Monaco, Rosemary A Carvalho
This paper aimed to develop and characterize oral disintegrating films (ODF) based on gelatin and hydroxypropyl methylcellulose (HPMC) incorporated with peanut skin extract (PSE) as phenolic compounds vehicle. Films were prepared by casting technique varying the polymer ratio (GEL:HPMC 100:0, 25:75, 50:50, 75:25, 0:100) and PSE concentration (20 and 30g/100g film-forming solution). Formulations with high content of gelatin presented insoluble complex possibly due to cross-linking between gelatin and polyphenols...
January 13, 2017: International Journal of Biological Macromolecules
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